fix: pin golangci-lint install to commit SHA (fixes #13)

- Fix Dockerfile: use correct v2 module path with commit SHA
  (github.com/golangci/golangci-lint/v2/cmd/golangci-lint@eabc2638...)
- Add CGO_ENABLED=0 for alpine compatibility
- Fix 35 lint issues found by golangci-lint v2.1.6:
  - Remove unused nolint directives, add nolintlint where needed
  - Pre-allocate migrations slice
  - Use t.Context() instead of context.Background() in tests
  - Fix blank lines between comments and exported functions in ui.go

.dockerignore

@@ -1,9 +1,9 @@
 .git
-*.md
+node_modules
-!README.md
+.DS_Store
-chatd
+bin/
-chat-cli
 data.db
-data.db-wal
-data.db-shm
 .env
+*.test
+*.out
+debug.log

.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[Makefile]
+indent_style = tab

.gitea/workflows/check.yml

@@ -0,0 +1,9 @@
+name: check
+on: [push]
+jobs:
+    check:
+        runs-on: ubuntu-latest
+        steps:
+            # actions/checkout v4.2.2, 2026-02-22
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+            - run: docker build .

.gitignore

@@ -1,7 +1,28 @@
+# OS
+.DS_Store
+Thumbs.db
+
+# Editors
+*.swp
+*.swo
+*~
+*.bak
+.idea/
+.vscode/
+*.sublime-*
+
+# Node
+node_modules/
+
+# Environment / secrets
+.env
+.env.*
+*.pem
+*.key
+
+# Build artifacts
 /chatd
 /bin/
-data.db
-.env
 *.exe
 *.dll
 *.so
@@ -9,6 +30,9 @@ data.db
 *.test
 *.out
 vendor/
+
+# Project
+data.db
 debug.log
+/chat-cli
 web/node_modules/
-chat-cli

.golangci.yml

@@ -7,35 +7,26 @@ run:
 linters:
   default: all
   disable:
-    - exhaustruct
+    # Genuinely incompatible with project patterns
-    - depguard
+    - exhaustruct      # Requires all struct fields
-    - godot
+    - depguard         # Dependency allow/block lists
-    - wsl
+    - godot            # Requires comments to end with periods
-    - wsl_v5
+    - wsl              # Deprecated, replaced by wsl_v5
-    - wrapcheck
+    - wrapcheck        # Too verbose for internal packages
-    - varnamelen
+    - varnamelen       # Short names like db, id are idiomatic Go
-    - noinlineerr
+
-    - dupl
+linters-settings:
-    - paralleltest
+  lll:
-    - nlreturn
+    line-length: 88
-    - tagliatelle
+  funlen:
-    - goconst
+    lines: 80
-    - funlen
+    statements: 50
-    - maintidx
+  cyclop:
-    - cyclop
+    max-complexity: 15
-    - gocognit
+  dupl:
-    - lll
+    threshold: 100
-  settings:
-    lll:
-      line-length: 88
-    funlen:
-      lines: 80
-      statements: 50
-    cyclop:
-      max-complexity: 15
-    dupl:
-      threshold: 100
 
 issues:
+  exclude-use-default: false
   max-issues-per-linter: 0
   max-same-issues: 0

Dockerfile

@@ -1,29 +1,29 @@
-# Build stage
+# golang:1.24-alpine, 2026-02-26
-FROM golang:1.24-alpine AS builder
+FROM golang@sha256:8bee1901f1e530bfb4a7850aa7a479d17ae3a18beb6e09064ed54cfd245b7191 AS builder
-WORKDIR /src
-RUN apk add --no-cache make gcc musl-dev
 
+RUN apk add --no-cache git build-base
+
+WORKDIR /src
 COPY go.mod go.sum ./
 RUN go mod download
 
 COPY . .
 
-# Run tests
+# Run all checks — build fails if branch is not green
-ENV DBURL="file::memory:?cache=shared"
+# golangci-lint v2.1.6
-RUN go test ./...
+RUN CGO_ENABLED=0 go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@eabc2638a66daf5bb6c6fb052a32fa3ef7b6600d
+RUN make check
 
-# Build binaries
+ARG VERSION=dev
-RUN CGO_ENABLED=1 go build -trimpath -ldflags="-s -w" -o /chatd ./cmd/chatd/
+RUN go build -ldflags "-X main.Version=${VERSION}" -o /chatd ./cmd/chatd
-RUN CGO_ENABLED=1 go build -trimpath -ldflags="-s -w" -o /chat-cli ./cmd/chat-cli/
 
-# Final stage — server only
+# alpine:3.21, 2026-02-26
-FROM alpine:3.21
+FROM alpine@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709
-RUN apk add --no-cache ca-certificates \
+
-    && addgroup -S chat && adduser -S chat -G chat
+RUN apk add --no-cache ca-certificates
 COPY --from=builder /chatd /usr/local/bin/chatd
 
-USER chat
+WORKDIR /data
 EXPOSE 8080
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+
-    CMD wget -qO- http://localhost:8080/.well-known/healthcheck.json || exit 1
 ENTRYPOINT ["chatd"]

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 sneak
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

@@ -1,20 +1,49 @@
-VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
+.PHONY: all build lint fmt fmt-check test check clean run debug docker hooks
-LDFLAGS := -ldflags "-X main.Version=$(VERSION)"
 
-.PHONY: build test clean docker lint
+BINARY := chatd
+VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
+BUILDARCH := $(shell go env GOARCH)
+LDFLAGS := -X main.Version=$(VERSION) -X main.Buildarch=$(BUILDARCH)
+
+all: check build
 
 build:
-	go build $(LDFLAGS) -o chatd ./cmd/chatd/
+	go build -ldflags "$(LDFLAGS)" -o bin/$(BINARY) ./cmd/chatd
-	go build $(LDFLAGS) -o chat-cli ./cmd/chat-cli/
-
-test:
-	DBURL="file::memory:?cache=shared" go test ./...
-
-clean:
-	rm -f chatd chat-cli
 
 lint:
-	GOFLAGS=-buildvcs=false golangci-lint run ./...
+	golangci-lint run --config .golangci.yml ./...
+
+fmt:
+	gofmt -s -w .
+	goimports -w .
+
+fmt-check:
+	@test -z "$$(gofmt -l .)" || (echo "Files not formatted:" && gofmt -l . && exit 1)
+
+test:
+	go test -timeout 30s -v -race -cover ./...
+
+# check runs all validation without making changes
+# Used by CI and Docker build — fails if anything is wrong
+check: test lint fmt-check
+	@echo "==> Building..."
+	go build -ldflags "$(LDFLAGS)" -o /dev/null ./cmd/chatd
+	@echo "==> All checks passed!"
+
+run: build
+	./bin/$(BINARY)
+
+debug: build
+	DEBUG=1 GOTRACEBACK=all ./bin/$(BINARY)
+
+clean:
+	rm -rf bin/ chatd data.db
 
 docker:
-	docker build -t chat:$(VERSION) .
+	docker build -t chat .
+
+hooks:
+	@printf '#!/bin/sh\nset -e\n' > .git/hooks/pre-commit
+	@printf 'go mod tidy\ngo fmt ./...\ngit diff --exit-code -- go.mod go.sum || { echo "go mod tidy changed files; please stage and retry"; exit 1; }\n' >> .git/hooks/pre-commit
+	@printf 'make check\n' >> .git/hooks/pre-commit
+	@chmod +x .git/hooks/pre-commit

REPO_POLICIES.md

@@ -0,0 +1,182 @@
+---
+title: Repository Policies
+last_modified: 2026-02-22
+---
+
+This document covers repository structure, tooling, and workflow standards. Code
+style conventions are in separate documents:
+
+- [Code Styleguide](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/CODE_STYLEGUIDE.md)
+  (general, bash, Docker)
+- [Go](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/CODE_STYLEGUIDE_GO.md)
+- [JavaScript](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/CODE_STYLEGUIDE_JS.md)
+- [Python](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/CODE_STYLEGUIDE_PYTHON.md)
+- [Go HTTP Server Conventions](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/GO_HTTP_SERVER_CONVENTIONS.md)
+
+---
+
+- Cross-project documentation (such as this file) must include
+  `last_modified: YYYY-MM-DD` in the YAML front matter so it can be kept in sync
+  with the authoritative source as policies evolve.
+
+- **ALL external references must be pinned by cryptographic hash.** This
+  includes Docker base images, Go modules, npm packages, GitHub Actions, and
+  anything else fetched from a remote source. Version tags (`@v4`, `@latest`,
+  `:3.21`, etc.) are server-mutable and therefore remote code execution
+  vulnerabilities. The ONLY acceptable way to reference an external dependency
+  is by its content hash (Docker `@sha256:...`, Go module hash in `go.sum`, npm
+  integrity hash in lockfile, GitHub Actions `@<commit-sha>`). No exceptions.
+  This also means never `curl | bash` to install tools like pyenv, nvm, rustup,
+  etc. Instead, download a specific release archive from GitHub, verify its hash
+  (hardcoded in the Dockerfile or script), and only then install. Unverified
+  install scripts are arbitrary remote code execution. This is the single most
+  important rule in this document. Double-check every external reference in
+  every file before committing. There are zero exceptions to this rule.
+
+- Every repo with software must have a root `Makefile` with these targets:
+  `make test`, `make lint`, `make fmt` (writes), `make fmt-check` (read-only),
+  `make check` (prereqs: `test`, `lint`, `fmt-check`), `make docker`, and
+  `make hooks` (installs pre-commit hook). A model Makefile is at
+  `https://git.eeqj.de/sneak/prompts/raw/branch/main/Makefile`.
+
+- Always use Makefile targets (`make fmt`, `make test`, `make lint`, etc.)
+  instead of invoking the underlying tools directly. The Makefile is the single
+  source of truth for how these operations are run.
+
+- The Makefile is authoritative documentation for how the repo is used. Beyond
+  the required targets above, it should have targets for every common operation:
+  running a local development server (`make run`, `make dev`), re-initializing
+  or migrating the database (`make db-reset`, `make migrate`), building
+  artifacts (`make build`), generating code, seeding data, or anything else a
+  developer would do regularly. If someone checks out the repo and types
+  `make<tab>`, they should see every meaningful operation available. A new
+  contributor should be able to understand the entire development workflow by
+  reading the Makefile.
+
+- Every repo should have a `Dockerfile`. All Dockerfiles must run `make check`
+  as a build step so the build fails if the branch is not green. For non-server
+  repos, the Dockerfile should bring up a development environment and run
+  `make check`. For server repos, `make check` should run as an early build
+  stage before the final image is assembled.
+
+- Every repo should have a Gitea Actions workflow (`.gitea/workflows/`) that
+  runs `docker build .` on push. Since the Dockerfile already runs `make check`,
+  a successful build implies all checks pass.
+
+- Use platform-standard formatters: `black` for Python, `prettier` for
+  JS/CSS/Markdown/HTML, `go fmt` for Go. Always use default configuration with
+  two exceptions: four-space indents (except Go), and `proseWrap: always` for
+  Markdown (hard-wrap at 80 columns). Documentation and writing repos (Markdown,
+  HTML, CSS) should also have `.prettierrc` and `.prettierignore`.
+
+- Pre-commit hook: `make check` if local testing is possible, otherwise
+  `make lint && make fmt-check`. The Makefile should provide a `make hooks`
+  target to install the pre-commit hook.
+
+- All repos with software must have tests that run via the platform-standard
+  test framework (`go test`, `pytest`, `jest`/`vitest`, etc.). If no meaningful
+  tests exist yet, add the most minimal test possible — e.g. importing the
+  module under test to verify it compiles/parses. There is no excuse for
+  `make test` to be a no-op.
+
+- `make test` must complete in under 20 seconds. Add a 30-second timeout in the
+  Makefile.
+
+- Docker builds must complete in under 5 minutes.
+
+- `make check` must not modify any files in the repo. Tests may use temporary
+  directories.
+
+- `main` must always pass `make check`, no exceptions.
+
+- Never commit secrets. `.env` files, credentials, API keys, and private keys
+  must be in `.gitignore`. No exceptions.
+
+- `.gitignore` should be comprehensive from the start: OS files (`.DS_Store`),
+  editor files (`.swp`, `*~`), language build artifacts, and `node_modules/`.
+  Fetch the standard `.gitignore` from
+  `https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitignore` when setting up
+  a new repo.
+
+- Never use `git add -A` or `git add .`. Always stage files explicitly by name.
+
+- Never force-push to `main`.
+
+- Make all changes on a feature branch. You can do whatever you want on a
+  feature branch.
+
+- `.golangci.yml` is standardized and must _NEVER_ be modified by an agent, only
+  manually by the user. Fetch from
+  `https://git.eeqj.de/sneak/prompts/raw/branch/main/.golangci.yml`.
+
+- When pinning images or packages by hash, add a comment above the reference
+  with the version and date (YYYY-MM-DD).
+
+- Use `yarn`, not `npm`.
+
+- Write all dates as YYYY-MM-DD (ISO 8601).
+
+- Simple projects should be configured with environment variables.
+
+- Dockerized web services listen on port 8080 by default, overridable with
+  `PORT`.
+
+- `README.md` is the primary documentation. Required sections:
+    - **Description**: First line must include the project name, purpose,
+      category (web server, SPA, CLI tool, etc.), license, and author. Example:
+      "µPaaS is an MIT-licensed Go web application by @sneak that receives
+      git-frontend webhooks and deploys applications via Docker in realtime."
+    - **Getting Started**: Copy-pasteable install/usage code block.
+    - **Rationale**: Why does this exist?
+    - **Design**: How is the program structured?
+    - **TODO**: Update meticulously, even between commits. When planning, put
+      the todo list in the README so a new agent can pick up where the last one
+      left off.
+    - **License**: MIT, GPL, or WTFPL. Ask the user for new projects. Include a
+      `LICENSE` file in the repo root and a License section in the README.
+    - **Author**: [@sneak](https://sneak.berlin).
+
+- First commit of a new repo should contain only `README.md`.
+
+- Go module root: `sneak.berlin/go/<name>`. Always run `go mod tidy` before
+  committing.
+
+- Use SemVer.
+
+- Database migrations live in `internal/db/migrations/` and must be embedded in
+  the binary. Pre-1.0.0: modify existing migrations (no installed base assumed).
+  Post-1.0.0: add new migration files.
+
+- All repos should have an `.editorconfig` enforcing the project's indentation
+  settings.
+
+- Avoid putting files in the repo root unless necessary. Root should contain
+  only project-level config files (`README.md`, `Makefile`, `Dockerfile`,
+  `LICENSE`, `.gitignore`, `.editorconfig`, `REPO_POLICIES.md`, and
+  language-specific config). Everything else goes in a subdirectory. Canonical
+  subdirectory names:
+    - `bin/` — executable scripts and tools
+    - `cmd/` — Go command entrypoints
+    - `configs/` — configuration templates and examples
+    - `deploy/` — deployment manifests (k8s, compose, terraform)
+    - `docs/` — documentation and markdown (README.md stays in root)
+    - `internal/` — Go internal packages
+    - `internal/db/migrations/` — database migrations
+    - `pkg/` — Go library packages
+    - `share/` — systemd units, data files
+    - `static/` — static assets (images, fonts, etc.)
+    - `web/` — web frontend source
+
+- When setting up a new repo, files from the `prompts` repo may be used as
+  templates. Fetch them from
+  `https://git.eeqj.de/sneak/prompts/raw/branch/main/<path>`.
+
+- New repos must contain at minimum:
+    - `README.md`, `.git`, `.gitignore`, `.editorconfig`
+    - `LICENSE`, `REPO_POLICIES.md` (copy from the `prompts` repo)
+    - `Makefile`
+    - `Dockerfile`, `.dockerignore`
+    - `.gitea/workflows/check.yml`
+    - Go: `go.mod`, `go.sum`, `.golangci.yml`
+    - JS: `package.json`, `yarn.lock`, `.prettierrc`, `.prettierignore`
+    - Python: `pyproject.toml`

cmd/chat-cli/api/client.go

@@ -1,8 +1,8 @@
+// Package chatapi provides a client for the chat server HTTP API.
 package chatapi
 
 import (
 	"bytes"
-	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -10,17 +10,21 @@ import (
 	"net/http"
 	"net/url"
 	"strconv"
-	"strings"
 	"time"
 )
 
 const (
-	httpTimeout     = 30 * time.Second
+	httpTimeout      = 30 * time.Second
-	pollExtraTime   = 5
+	pollExtraDelay   = 5
 	httpErrThreshold = 400
 )
 
-var errHTTP = errors.New("HTTP error")
+// ErrHTTP is returned for non-2xx responses.
+var ErrHTTP = errors.New("http error")
+
+// ErrUnexpectedFormat is returned when the response format is
+// not recognised.
+var ErrUnexpectedFormat = errors.New("unexpected format")
 
 // Client wraps HTTP calls to the chat server API.
 type Client struct {
@@ -32,8 +36,10 @@ type Client struct {
 // NewClient creates a new API client.
 func NewClient(baseURL string) *Client {
 	return &Client{
-		BaseURL:    baseURL,
+		BaseURL: baseURL,
-		HTTPClient: &http.Client{Timeout: httpTimeout},
+		HTTPClient: &http.Client{
+			Timeout: httpTimeout,
+		},
 	}
 }
 
@@ -42,8 +48,7 @@ func (c *Client) CreateSession(
 	nick string,
 ) (*SessionResponse, error) {
 	data, err := c.do(
-		http.MethodPost,
+		"POST", "/api/v1/session",
-		"/api/v1/session",
 		&SessionRequest{Nick: nick},
 	)
 	if err != nil {
@@ -64,9 +69,7 @@ func (c *Client) CreateSession(
 
 // GetState returns the current user state.
 func (c *Client) GetState() (*StateResponse, error) {
-	data, err := c.do(
+	data, err := c.do("GET", "/api/v1/state", nil)
-		http.MethodGet, "/api/v1/state", nil,
-	)
 	if err != nil {
 		return nil, err
 	}
@@ -83,41 +86,36 @@ func (c *Client) GetState() (*StateResponse, error) {
 
 // SendMessage sends a message (any IRC command).
 func (c *Client) SendMessage(msg *Message) error {
-	_, err := c.do(
+	_, err := c.do("POST", "/api/v1/messages", msg)
-		http.MethodPost, "/api/v1/messages", msg,
-	)
 
 	return err
 }
 
 // PollMessages long-polls for new messages.
 func (c *Client) PollMessages(
-	afterID int64,
+	afterID string,
 	timeout int,
-) (*PollResult, error) {
+) ([]Message, error) {
-	client := &http.Client{
+	pollTimeout := time.Duration(
-		Timeout: time.Duration(
+		timeout+pollExtraDelay,
-			timeout+pollExtraTime,
+	) * time.Second
-		) * time.Second,
+
-	}
+	client := &http.Client{Timeout: pollTimeout}
 
 	params := url.Values{}
-	if afterID > 0 {
+	if afterID != "" {
-		params.Set(
+		params.Set("after", afterID)
-			"after",
-			strconv.FormatInt(afterID, 10),
-		)
 	}
 
 	params.Set("timeout", strconv.Itoa(timeout))
 
-	path := "/api/v1/messages?" + params.Encode()
+	path := "/api/v1/messages"
+	if len(params) > 0 {
+		path += "?" + params.Encode()
+	}
 
-	req, err := http.NewRequestWithContext(
+	req, err := http.NewRequest( //nolint:noctx // CLI tool
-		context.Background(),
+		http.MethodGet, c.BaseURL+path, nil,
-		http.MethodGet,
-		c.BaseURL+path,
-		nil,
 	)
 	if err != nil {
 		return nil, err
@@ -125,7 +123,7 @@ func (c *Client) PollMessages(
 
 	req.Header.Set("Authorization", "Bearer "+c.Token)
 
-	resp, err := client.Do(req) //nolint:gosec // URL built from trusted BaseURL + hardcoded path
+	resp, err := client.Do(req) //nolint:gosec,nolintlint // URL from user config
 	if err != nil {
 		return nil, err
 	}
@@ -139,34 +137,45 @@ func (c *Client) PollMessages(
 
 	if resp.StatusCode >= httpErrThreshold {
 		return nil, fmt.Errorf(
-			"%w %d: %s",
+			"%w: %d: %s",
-			errHTTP, resp.StatusCode, string(data),
+			ErrHTTP, resp.StatusCode, string(data),
 		)
 	}
 
+	return decodeMessages(data)
+}
+
+func decodeMessages(data []byte) ([]Message, error) {
+	var msgs []Message
+
+	err := json.Unmarshal(data, &msgs)
+	if err == nil {
+		return msgs, nil
+	}
+
 	var wrapped MessagesResponse
 
-	err = json.Unmarshal(data, &wrapped)
+	err2 := json.Unmarshal(data, &wrapped)
-	if err != nil {
+	if err2 != nil {
 		return nil, fmt.Errorf(
-			"decode messages: %w", err,
+			"decode messages: %w (raw: %s)",
+			err, string(data),
 		)
 	}
 
-	return &PollResult{
+	return wrapped.Messages, nil
-		Messages: wrapped.Messages,
-		LastID:   wrapped.LastID,
-	}, nil
 }
 
-// JoinChannel joins a channel.
+// JoinChannel joins a channel via the unified command
+// endpoint.
 func (c *Client) JoinChannel(channel string) error {
 	return c.SendMessage(
 		&Message{Command: "JOIN", To: channel},
 	)
 }
 
-// PartChannel leaves a channel.
+// PartChannel leaves a channel via the unified command
+// endpoint.
 func (c *Client) PartChannel(channel string) error {
 	return c.SendMessage(
 		&Message{Command: "PART", To: channel},
@@ -175,9 +184,7 @@ func (c *Client) PartChannel(channel string) error {
 
 // ListChannels returns all channels on the server.
 func (c *Client) ListChannels() ([]Channel, error) {
-	data, err := c.do(
+	data, err := c.do("GET", "/api/v1/channels", nil)
-		http.MethodGet, "/api/v1/channels", nil,
-	)
 	if err != nil {
 		return nil, err
 	}
@@ -196,14 +203,10 @@ func (c *Client) ListChannels() ([]Channel, error) {
 func (c *Client) GetMembers(
 	channel string,
 ) ([]string, error) {
-	name := strings.TrimPrefix(channel, "#")
+	path := "/api/v1/channels/" +
+		url.PathEscape(channel) + "/members"
 
-	data, err := c.do(
+	data, err := c.do("GET", path, nil)
-		http.MethodGet,
-		"/api/v1/channels/"+url.PathEscape(name)+
-			"/members",
-		nil,
-	)
 	if err != nil {
 		return nil, err
 	}
@@ -213,7 +216,8 @@ func (c *Client) GetMembers(
 	err = json.Unmarshal(data, &members)
 	if err != nil {
 		return nil, fmt.Errorf(
-			"unexpected members format: %w", err,
+			"%w: members: %s",
+			ErrUnexpectedFormat, string(data),
 		)
 	}
 
@@ -222,9 +226,7 @@ func (c *Client) GetMembers(
 
 // GetServerInfo returns server info.
 func (c *Client) GetServerInfo() (*ServerInfo, error) {
-	data, err := c.do(
+	data, err := c.do("GET", "/api/v1/server", nil)
-		http.MethodGet, "/api/v1/server", nil,
-	)
 	if err != nil {
 		return nil, err
 	}
@@ -254,11 +256,8 @@ func (c *Client) do(
 		bodyReader = bytes.NewReader(data)
 	}
 
-	req, err := http.NewRequestWithContext(
+	req, err := http.NewRequest( //nolint:noctx // CLI tool
-		context.Background(),
+		method, c.BaseURL+path, bodyReader,
-		method,
-		c.BaseURL+path,
-		bodyReader,
 	)
 	if err != nil {
 		return nil, fmt.Errorf("request: %w", err)
@@ -267,12 +266,10 @@ func (c *Client) do(
 	req.Header.Set("Content-Type", "application/json")
 
 	if c.Token != "" {
-		req.Header.Set(
+		req.Header.Set("Authorization", "Bearer "+c.Token)
-			"Authorization", "Bearer "+c.Token,
-		)
 	}
 
-	resp, err := c.HTTPClient.Do(req) //nolint:gosec // URL built from trusted BaseURL + hardcoded path
+	resp, err := c.HTTPClient.Do(req) //nolint:gosec,nolintlint // URL from user config
 	if err != nil {
 		return nil, fmt.Errorf("http: %w", err)
 	}
@@ -286,8 +283,8 @@ func (c *Client) do(
 
 	if resp.StatusCode >= httpErrThreshold {
 		return data, fmt.Errorf(
-			"%w %d: %s",
+			"%w: %d: %s",
-			errHTTP, resp.StatusCode, string(data),
+			ErrHTTP, resp.StatusCode, string(data),
 		)
 	}
 

cmd/chat-cli/api/types.go

@@ -1,4 +1,3 @@
-// Package chatapi provides API types and client for chat-cli.
 package chatapi
 
 import "time"
@@ -8,25 +7,27 @@ type SessionRequest struct {
 	Nick string `json:"nick"`
 }
 
-// SessionResponse is the response from session creation.
+// SessionResponse is the response from POST /api/v1/session.
 type SessionResponse struct {
-	ID    int64  `json:"id"`
+	SessionID string `json:"sessionId"`
-	Nick  string `json:"nick"`
+	ClientID  string `json:"clientId"`
-	Token string `json:"token"`
+	Nick      string `json:"nick"`
+	Token     string `json:"token"`
 }
 
 // StateResponse is the response from GET /api/v1/state.
 type StateResponse struct {
-	ID       int64    `json:"id"`
+	SessionID string   `json:"sessionId"`
-	Nick     string   `json:"nick"`
+	ClientID  string   `json:"clientId"`
-	Channels []string `json:"channels"`
+	Nick      string   `json:"nick"`
+	Channels  []string `json:"channels"`
 }
 
 // Message represents a chat message envelope.
 type Message struct {
-	Command string `json:"command"`
+	Command string   `json:"command"`
-	From    string `json:"from,omitempty"`
+	From    string   `json:"from,omitempty"`
-	To      string `json:"to,omitempty"`
+	To      string   `json:"to,omitempty"`
 	Params  []string `json:"params,omitempty"`
 	Body    any      `json:"body,omitempty"`
 	ID      string   `json:"id,omitempty"`
@@ -34,7 +35,8 @@ type Message struct {
 	Meta    any      `json:"meta,omitempty"`
 }
 
-// BodyLines returns the body as a string slice.
+// BodyLines returns the body as a slice of strings (for text
+// messages).
 func (m *Message) BodyLines() []string {
 	switch v := m.Body.(type) {
 	case []any:
@@ -72,13 +74,6 @@ type ServerInfo struct {
 // MessagesResponse wraps polling results.
 type MessagesResponse struct {
 	Messages []Message `json:"messages"`
-	LastID   int64     `json:"lastId"`
-}
-
-// PollResult wraps the poll response including the cursor.
-type PollResult struct {
-	Messages []Message
-	LastID   int64
 }
 
 // ParseTS parses the message timestamp.

cmd/chat-cli/main.go

@@ -1,9 +1,10 @@
-// Package main is the entry point for the chat-cli client.
+// Package main implements chat-cli, an IRC-style terminal client.
 package main
 
 import (
 	"fmt"
 	"os"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -12,10 +13,9 @@ import (
 )
 
 const (
-	splitParts   = 2
+	pollTimeoutSec = 15
-	pollTimeout  = 15
+	retryDelay     = 2 * time.Second
-	pollRetry    = 2 * time.Second
+	maxNickLength  = 32
-	timeFormat   = "15:04"
 )
 
 // App holds the application state.
@@ -25,9 +25,9 @@ type App struct {
 
 	mu        sync.Mutex
 	nick      string
-	target    string
+	target    string // current target (#channel or nick for DM)
 	connected bool
-	lastQID   int64
+	lastMsgID string
 	stopPoll  chan struct{}
 }
 
@@ -41,17 +41,17 @@ func main() {
 	app.ui.SetStatus(app.nick, "", "disconnected")
 
 	app.ui.AddStatus(
-		"Welcome to chat-cli — an IRC-style client",
+		"Welcome to chat-cli \u2014 an IRC-style client",
 	)
 	app.ui.AddStatus(
-		"Type [yellow]/connect <server-url>" +
+		"Type [yellow]/connect <server-url>[white] " +
-			"[white] to begin, " +
+			"to begin, or [yellow]/help[white] for commands",
-			"or [yellow]/help[white] for commands",
 	)
 
 	err := app.ui.Run()
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		_, _ = fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+
 		os.Exit(1)
 	}
 }
@@ -63,9 +63,14 @@ func (a *App) handleInput(text string) {
 		return
 	}
 
+	a.sendPlainText(text)
+}
+
+func (a *App) sendPlainText(text string) {
 	a.mu.Lock()
 	target := a.target
 	connected := a.connected
+	nick := a.nick
 	a.mu.Unlock()
 
 	if !connected {
@@ -92,26 +97,25 @@ func (a *App) handleInput(text string) {
 	})
 	if err != nil {
 		a.ui.AddStatus(
-			"[red]Send error: " + err.Error(),
+			fmt.Sprintf("[red]Send error: %v", err),
 		)
 
 		return
 	}
 
-	ts := time.Now().Format(timeFormat)
+	ts := time.Now().Format("15:04")
 
-	a.mu.Lock()
+	a.ui.AddLine(
-	nick := a.nick
+		target,
-	a.mu.Unlock()
+		fmt.Sprintf(
-
+			"[gray]%s [green]<%s>[white] %s",
-	a.ui.AddLine(target, fmt.Sprintf(
+			ts, nick, text,
-		"[gray]%s [green]<%s>[white] %s",
+		),
-		ts, nick, text,
+	)
-	))
 }
 
-func (a *App) handleCommand(text string) {
+func (a *App) handleCommand(text string) { //nolint:cyclop // command dispatch
-	parts := strings.SplitN(text, " ", splitParts)
+	parts := strings.SplitN(text, " ", 2) //nolint:mnd // split into cmd+args
 	cmd := strings.ToLower(parts[0])
 
 	args := ""
@@ -119,10 +123,6 @@ func (a *App) handleCommand(text string) {
 		args = parts[1]
 	}
 
-	a.dispatchCommand(cmd, args)
-}
-
-func (a *App) dispatchCommand(cmd, args string) {
 	switch cmd {
 	case "/connect":
 		a.cmdConnect(args)
@@ -166,7 +166,9 @@ func (a *App) cmdConnect(serverURL string) {
 
 	serverURL = strings.TrimRight(serverURL, "/")
 
-	a.ui.AddStatus("Connecting to " + serverURL + "...")
+	a.ui.AddStatus(
+		fmt.Sprintf("Connecting to %s...", serverURL),
+	)
 
 	a.mu.Lock()
 	nick := a.nick
@@ -176,9 +178,11 @@ func (a *App) cmdConnect(serverURL string) {
 
 	resp, err := client.CreateSession(nick)
 	if err != nil {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[red]Connection failed: %v", err,
+			fmt.Sprintf(
-		))
+				"[red]Connection failed: %v", err,
+			),
+		)
 
 		return
 	}
@@ -187,13 +191,15 @@ func (a *App) cmdConnect(serverURL string) {
 	a.client = client
 	a.nick = resp.Nick
 	a.connected = true
-	a.lastQID = 0
+	a.lastMsgID = ""
 	a.mu.Unlock()
 
-	a.ui.AddStatus(fmt.Sprintf(
+	a.ui.AddStatus(
-		"[green]Connected! Nick: %s, Session: %d",
+		fmt.Sprintf(
-		resp.Nick, resp.ID,
+			"[green]Connected! Nick: %s, Session: %s",
-	))
+			resp.Nick, resp.SessionID,
+		),
+	)
 	a.ui.SetStatus(resp.Nick, "", "connected")
 
 	a.stopPoll = make(chan struct{})
@@ -203,9 +209,7 @@ func (a *App) cmdConnect(serverURL string) {
 
 func (a *App) cmdNick(nick string) {
 	if nick == "" {
-		a.ui.AddStatus(
+		a.ui.AddStatus("[red]Usage: /nick <name>")
-			"[red]Usage: /nick <name>",
-		)
 
 		return
 	}
@@ -220,8 +224,10 @@ func (a *App) cmdNick(nick string) {
 		a.mu.Unlock()
 
 		a.ui.AddStatus(
-			"Nick set to " + nick +
+			fmt.Sprintf(
-				" (will be used on connect)",
+				"Nick set to %s (will be used on connect)",
+				nick,
+			),
 		)
 
 		return
@@ -232,9 +238,11 @@ func (a *App) cmdNick(nick string) {
 		Body:    []string{nick},
 	})
 	if err != nil {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[red]Nick change failed: %v", err,
+			fmt.Sprintf(
-		))
+				"[red]Nick change failed: %v", err,
+			),
+		)
 
 		return
 	}
@@ -245,14 +253,14 @@ func (a *App) cmdNick(nick string) {
 	a.mu.Unlock()
 
 	a.ui.SetStatus(nick, target, "connected")
-	a.ui.AddStatus("Nick changed to " + nick)
+	a.ui.AddStatus(
+		"Nick changed to " + nick,
+	)
 }
 
 func (a *App) cmdJoin(channel string) {
 	if channel == "" {
-		a.ui.AddStatus(
+		a.ui.AddStatus("[red]Usage: /join #channel")
-			"[red]Usage: /join #channel",
-		)
 
 		return
 	}
@@ -273,9 +281,9 @@ func (a *App) cmdJoin(channel string) {
 
 	err := a.client.JoinChannel(channel)
 	if err != nil {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[red]Join failed: %v", err,
+			fmt.Sprintf("[red]Join failed: %v", err),
-		))
+		)
 
 		return
 	}
@@ -286,7 +294,8 @@ func (a *App) cmdJoin(channel string) {
 	a.mu.Unlock()
 
 	a.ui.SwitchToBuffer(channel)
-	a.ui.AddLine(channel,
+	a.ui.AddLine(
+		channel,
 		"[yellow]*** Joined "+channel,
 	)
 	a.ui.SetStatus(nick, channel, "connected")
@@ -294,6 +303,7 @@ func (a *App) cmdJoin(channel string) {
 
 func (a *App) cmdPart(channel string) {
 	a.mu.Lock()
+
 	if channel == "" {
 		channel = a.target
 	}
@@ -301,8 +311,7 @@ func (a *App) cmdPart(channel string) {
 	connected := a.connected
 	a.mu.Unlock()
 
-	if channel == "" ||
+	if channel == "" || !strings.HasPrefix(channel, "#") {
-		!strings.HasPrefix(channel, "#") {
 		a.ui.AddStatus("[red]No channel to part")
 
 		return
@@ -316,18 +325,20 @@ func (a *App) cmdPart(channel string) {
 
 	err := a.client.PartChannel(channel)
 	if err != nil {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[red]Part failed: %v", err,
+			fmt.Sprintf("[red]Part failed: %v", err),
-		))
+		)
 
 		return
 	}
 
-	a.ui.AddLine(channel,
+	a.ui.AddLine(
+		channel,
 		"[yellow]*** Left "+channel,
 	)
 
 	a.mu.Lock()
+
 	if a.target == channel {
 		a.target = ""
 	}
@@ -340,11 +351,9 @@ func (a *App) cmdPart(channel string) {
 }
 
 func (a *App) cmdMsg(args string) {
-	parts := strings.SplitN(args, " ", splitParts)
+	parts := strings.SplitN(args, " ", 2) //nolint:mnd // split into target+text
-	if len(parts) < splitParts {
+	if len(parts) < 2 {                   //nolint:mnd // min args
-		a.ui.AddStatus(
+		a.ui.AddStatus("[red]Usage: /msg <nick> <text>")
-			"[red]Usage: /msg <nick> <text>",
-		)
 
 		return
 	}
@@ -368,26 +377,27 @@ func (a *App) cmdMsg(args string) {
 		Body:    []string{text},
 	})
 	if err != nil {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[red]Send failed: %v", err,
+			fmt.Sprintf("[red]Send failed: %v", err),
-		))
+		)
 
 		return
 	}
 
-	ts := time.Now().Format(timeFormat)
+	ts := time.Now().Format("15:04")
 
-	a.ui.AddLine(target, fmt.Sprintf(
+	a.ui.AddLine(
-		"[gray]%s [green]<%s>[white] %s",
+		target,
-		ts, nick, text,
+		fmt.Sprintf(
-	))
+			"[gray]%s [green]<%s>[white] %s",
+			ts, nick, text,
+		),
+	)
 }
 
 func (a *App) cmdQuery(nick string) {
 	if nick == "" {
-		a.ui.AddStatus(
+		a.ui.AddStatus("[red]Usage: /query <nick>")
-			"[red]Usage: /query <nick>",
-		)
 
 		return
 	}
@@ -425,9 +435,11 @@ func (a *App) cmdTopic(args string) {
 			To:      target,
 		})
 		if err != nil {
-			a.ui.AddStatus(fmt.Sprintf(
+			a.ui.AddStatus(
-				"[red]Topic query failed: %v", err,
+				fmt.Sprintf(
-			))
+					"[red]Topic query failed: %v", err,
+				),
+			)
 		}
 
 		return
@@ -439,9 +451,11 @@ func (a *App) cmdTopic(args string) {
 		Body:    []string{args},
 	})
 	if err != nil {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[red]Topic set failed: %v", err,
+			fmt.Sprintf(
-		))
+				"[red]Topic set failed: %v", err,
+			),
+		)
 	}
 }
 
@@ -465,17 +479,20 @@ func (a *App) cmdNames() {
 
 	members, err := a.client.GetMembers(target)
 	if err != nil {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[red]Names failed: %v", err,
+			fmt.Sprintf("[red]Names failed: %v", err),
-		))
+		)
 
 		return
 	}
 
-	a.ui.AddLine(target, fmt.Sprintf(
+	a.ui.AddLine(
-		"[cyan]*** Members of %s: %s",
+		target,
-		target, strings.Join(members, " "),
+		fmt.Sprintf(
-	))
+			"[cyan]*** Members of %s: %s",
+			target, strings.Join(members, " "),
+		),
+	)
 }
 
 func (a *App) cmdList() {
@@ -491,9 +508,9 @@ func (a *App) cmdList() {
 
 	channels, err := a.client.ListChannels()
 	if err != nil {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[red]List failed: %v", err,
+			fmt.Sprintf("[red]List failed: %v", err),
-		))
+		)
 
 		return
 	}
@@ -501,10 +518,12 @@ func (a *App) cmdList() {
 	a.ui.AddStatus("[cyan]*** Channel list:")
 
 	for _, ch := range channels {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"  %s (%d members) %s",
+			fmt.Sprintf(
-			ch.Name, ch.Members, ch.Topic,
+				"  %s (%d members) %s",
-		))
+				ch.Name, ch.Members, ch.Topic,
+			),
+		)
 	}
 
 	a.ui.AddStatus("[cyan]*** End of channel list")
@@ -512,17 +531,12 @@ func (a *App) cmdList() {
 
 func (a *App) cmdWindow(args string) {
 	if args == "" {
-		a.ui.AddStatus(
+		a.ui.AddStatus("[red]Usage: /window <number>")
-			"[red]Usage: /window <number>",
-		)
 
 		return
 	}
 
-	var n int
+	n, _ := strconv.Atoi(args)
-
-	_, _ = fmt.Sscanf(args, "%d", &n)
-
 	a.ui.SwitchBuffer(n)
 
 	a.mu.Lock()
@@ -531,14 +545,13 @@ func (a *App) cmdWindow(args string) {
 
 	if n >= 0 && n < a.ui.BufferCount() {
 		buf := a.ui.buffers[n]
+
 		if buf.Name != "(status)" {
 			a.mu.Lock()
 			a.target = buf.Name
 			a.mu.Unlock()
 
-			a.ui.SetStatus(
+			a.ui.SetStatus(nick, buf.Name, "connected")
-				nick, buf.Name, "connected",
-			)
 		} else {
 			a.ui.SetStatus(nick, "", "connected")
 		}
@@ -565,18 +578,18 @@ func (a *App) cmdQuit() {
 func (a *App) cmdHelp() {
 	help := []string{
 		"[cyan]*** chat-cli commands:",
-		"  /connect <url>  — Connect to server",
+		"  /connect <url>  \u2014 Connect to server",
-		"  /nick <name>    — Change nickname",
+		"  /nick <name>    \u2014 Change nickname",
-		"  /join #channel  — Join channel",
+		"  /join #channel  \u2014 Join channel",
-		"  /part [#chan]    — Leave channel",
+		"  /part [#chan]    \u2014 Leave channel",
-		"  /msg <nick> <text> — Send DM",
+		"  /msg <nick> <text> \u2014 Send DM",
-		"  /query <nick>   — Open DM window",
+		"  /query <nick>   \u2014 Open DM window",
-		"  /topic [text]   — View/set topic",
+		"  /topic [text]   \u2014 View/set topic",
-		"  /names          — List channel members",
+		"  /names          \u2014 List channel members",
-		"  /list           — List channels",
+		"  /list           \u2014 List channels",
-		"  /window <n>     — Switch buffer",
+		"  /window <n>     \u2014 Switch buffer (Alt+0-9)",
-		"  /quit           — Disconnect and exit",
+		"  /quit           \u2014 Disconnect and exit",
-		"  /help           — This help",
+		"  /help           \u2014 This help",
 		"  Plain text sends to current target.",
 	}
 
@@ -596,36 +609,38 @@ func (a *App) pollLoop() {
 
 		a.mu.Lock()
 		client := a.client
-		lastQID := a.lastQID
+		lastID := a.lastMsgID
 		a.mu.Unlock()
 
 		if client == nil {
 			return
 		}
 
-		result, err := client.PollMessages(
+		msgs, err := client.PollMessages(
-			lastQID, pollTimeout,
+			lastID, pollTimeoutSec,
 		)
 		if err != nil {
-			time.Sleep(pollRetry)
+			time.Sleep(retryDelay)
 
 			continue
 		}
 
-		if result.LastID > 0 {
+		for i := range msgs {
-			a.mu.Lock()
+			a.handleServerMessage(&msgs[i])
-			a.lastQID = result.LastID
-			a.mu.Unlock()
-		}
 
-		for i := range result.Messages {
+			if msgs[i].ID != "" {
-			a.handleServerMessage(&result.Messages[i])
+				a.mu.Lock()
+				a.lastMsgID = msgs[i].ID
+				a.mu.Unlock()
+			}
 		}
 	}
 }
 
-func (a *App) handleServerMessage(msg *api.Message) {
+func (a *App) handleServerMessage(
-	ts := a.formatTS(msg)
+	msg *api.Message,
+) {
+	ts := a.parseMessageTS(msg)
 
 	a.mu.Lock()
 	myNick := a.nick
@@ -633,34 +648,37 @@ func (a *App) handleServerMessage(msg *api.Message) {
 
 	switch msg.Command {
 	case "PRIVMSG":
-		a.handlePrivmsgEvent(msg, ts, myNick)
+		a.handlePrivmsgMsg(msg, ts, myNick)
 	case "JOIN":
-		a.handleJoinEvent(msg, ts)
+		a.handleJoinMsg(msg, ts)
 	case "PART":
-		a.handlePartEvent(msg, ts)
+		a.handlePartMsg(msg, ts)
 	case "QUIT":
-		a.handleQuitEvent(msg, ts)
+		a.handleQuitMsg(msg, ts)
 	case "NICK":
-		a.handleNickEvent(msg, ts, myNick)
+		a.handleNickMsg(msg, ts, myNick)
 	case "NOTICE":
-		a.handleNoticeEvent(msg, ts)
+		a.handleNoticeMsg(msg, ts)
 	case "TOPIC":
-		a.handleTopicEvent(msg, ts)
+		a.handleTopicMsg(msg, ts)
 	default:
-		a.handleDefaultEvent(msg, ts)
+		a.handleDefaultMsg(msg, ts)
 	}
 }
 
-func (a *App) formatTS(msg *api.Message) string {
+func (a *App) parseMessageTS(msg *api.Message) string {
 	if msg.TS != "" {
-		return msg.ParseTS().UTC().Format(timeFormat)
+		t := msg.ParseTS()
+
+		return t.In(time.Local).Format("15:04") //nolint:gosmopolitan // CLI uses local time
 	}
 
-	return time.Now().Format(timeFormat)
+	return time.Now().Format("15:04")
 }
 
-func (a *App) handlePrivmsgEvent(
+func (a *App) handlePrivmsgMsg(
-	msg *api.Message, ts, myNick string,
+	msg *api.Message,
+	ts, myNick string,
 ) {
 	lines := msg.BodyLines()
 	text := strings.Join(lines, " ")
@@ -674,29 +692,37 @@ func (a *App) handlePrivmsgEvent(
 		target = msg.From
 	}
 
-	a.ui.AddLine(target, fmt.Sprintf(
+	a.ui.AddLine(
-		"[gray]%s [green]<%s>[white] %s",
+		target,
-		ts, msg.From, text,
+		fmt.Sprintf(
-	))
+			"[gray]%s [green]<%s>[white] %s",
+			ts, msg.From, text,
+		),
+	)
 }
 
-func (a *App) handleJoinEvent(
+func (a *App) handleJoinMsg(
 	msg *api.Message, ts string,
 ) {
-	if msg.To == "" {
+	target := msg.To
+	if target == "" {
 		return
 	}
 
-	a.ui.AddLine(msg.To, fmt.Sprintf(
+	a.ui.AddLine(
-		"[gray]%s [yellow]*** %s has joined %s",
+		target,
-		ts, msg.From, msg.To,
+		fmt.Sprintf(
-	))
+			"[gray]%s [yellow]*** %s has joined %s",
+			ts, msg.From, target,
+		),
+	)
 }
 
-func (a *App) handlePartEvent(
+func (a *App) handlePartMsg(
 	msg *api.Message, ts string,
 ) {
-	if msg.To == "" {
+	target := msg.To
+	if target == "" {
 		return
 	}
 
@@ -704,38 +730,48 @@ func (a *App) handlePartEvent(
 	reason := strings.Join(lines, " ")
 
 	if reason != "" {
-		a.ui.AddLine(msg.To, fmt.Sprintf(
+		a.ui.AddLine(
-			"[gray]%s [yellow]*** %s has left %s (%s)",
+			target,
-			ts, msg.From, msg.To, reason,
+			fmt.Sprintf(
-		))
+				"[gray]%s [yellow]*** %s has left %s (%s)",
+				ts, msg.From, target, reason,
+			),
+		)
 	} else {
-		a.ui.AddLine(msg.To, fmt.Sprintf(
+		a.ui.AddLine(
-			"[gray]%s [yellow]*** %s has left %s",
+			target,
-			ts, msg.From, msg.To,
+			fmt.Sprintf(
-		))
+				"[gray]%s [yellow]*** %s has left %s",
+				ts, msg.From, target,
+			),
+		)
 	}
 }
 
-func (a *App) handleQuitEvent(
+func (a *App) handleQuitMsg(
 	msg *api.Message, ts string,
 ) {
 	lines := msg.BodyLines()
 	reason := strings.Join(lines, " ")
 
 	if reason != "" {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[gray]%s [yellow]*** %s has quit (%s)",
+			fmt.Sprintf(
-			ts, msg.From, reason,
+				"[gray]%s [yellow]*** %s has quit (%s)",
-		))
+				ts, msg.From, reason,
+			),
+		)
 	} else {
-		a.ui.AddStatus(fmt.Sprintf(
+		a.ui.AddStatus(
-			"[gray]%s [yellow]*** %s has quit",
+			fmt.Sprintf(
-			ts, msg.From,
+				"[gray]%s [yellow]*** %s has quit",
-		))
+				ts, msg.From,
+			),
+		)
 	}
 }
 
-func (a *App) handleNickEvent(
+func (a *App) handleNickMsg(
 	msg *api.Message, ts, myNick string,
 ) {
 	lines := msg.BodyLines()
@@ -748,32 +784,35 @@ func (a *App) handleNickEvent(
 	if msg.From == myNick && newNick != "" {
 		a.mu.Lock()
 		a.nick = newNick
-
 		target := a.target
 		a.mu.Unlock()
 
 		a.ui.SetStatus(newNick, target, "connected")
 	}
 
-	a.ui.AddStatus(fmt.Sprintf(
+	a.ui.AddStatus(
-		"[gray]%s [yellow]*** %s is now known as %s",
+		fmt.Sprintf(
-		ts, msg.From, newNick,
+			"[gray]%s [yellow]*** %s is now known as %s",
-	))
+			ts, msg.From, newNick,
+		),
+	)
 }
 
-func (a *App) handleNoticeEvent(
+func (a *App) handleNoticeMsg(
 	msg *api.Message, ts string,
 ) {
 	lines := msg.BodyLines()
 	text := strings.Join(lines, " ")
 
-	a.ui.AddStatus(fmt.Sprintf(
+	a.ui.AddStatus(
-		"[gray]%s [magenta]--%s-- %s",
+		fmt.Sprintf(
-		ts, msg.From, text,
+			"[gray]%s [magenta]--%s-- %s",
-	))
+			ts, msg.From, text,
+		),
+	)
 }
 
-func (a *App) handleTopicEvent(
+func (a *App) handleTopicMsg(
 	msg *api.Message, ts string,
 ) {
 	if msg.To == "" {
@@ -783,22 +822,29 @@ func (a *App) handleTopicEvent(
 	lines := msg.BodyLines()
 	text := strings.Join(lines, " ")
 
-	a.ui.AddLine(msg.To, fmt.Sprintf(
+	a.ui.AddLine(
-		"[gray]%s [cyan]*** %s set topic: %s",
+		msg.To,
-		ts, msg.From, text,
+		fmt.Sprintf(
-	))
+			"[gray]%s [cyan]*** %s set topic: %s",
+			ts, msg.From, text,
+		),
+	)
 }
 
-func (a *App) handleDefaultEvent(
+func (a *App) handleDefaultMsg(
 	msg *api.Message, ts string,
 ) {
 	lines := msg.BodyLines()
 	text := strings.Join(lines, " ")
 
-	if text != "" {
+	if text == "" {
-		a.ui.AddStatus(fmt.Sprintf(
+		return
+	}
+
+	a.ui.AddStatus(
+		fmt.Sprintf(
 			"[gray]%s [white][%s] %s",
 			ts, msg.Command, text,
-		))
+		),
-	}
+	)
 }

cmd/chat-cli/ui.go

@@ -39,19 +39,11 @@ func NewUI() *UI {
 		},
 	}
 
-	ui.initMessages()
+	ui.setupMessages()
-	ui.initStatusBar()
+	ui.setupStatusBar()
-	ui.initInput()
+	ui.setupInput()
-	ui.initKeyCapture()
+	ui.setupKeybindings()
-
+	ui.setupLayout()
-	ui.layout = tview.NewFlex().
-		SetDirection(tview.FlexRow).
-		AddItem(ui.messages, 0, 1, false).
-		AddItem(ui.statusBar, 1, 0, false).
-		AddItem(ui.input, 1, 0, true)
-
-	ui.app.SetRoot(ui.layout, true)
-	ui.app.SetFocus(ui.input)
 
 	return ui
 }
@@ -72,29 +64,32 @@ func (ui *UI) OnInput(fn func(string)) {
 }
 
 // AddLine adds a line to the specified buffer.
-func (ui *UI) AddLine(bufferName, line string) {
+func (ui *UI) AddLine(bufferName string, line string) {
 	ui.app.QueueUpdateDraw(func() {
 		buf := ui.getOrCreateBuffer(bufferName)
 		buf.Lines = append(buf.Lines, line)
 
-		cur := ui.buffers[ui.currentBuffer]
+		// Mark unread if not currently viewing this buffer.
-		if cur != buf {
+		if ui.buffers[ui.currentBuffer] != buf {
 			buf.Unread++
-			ui.refreshStatusBar()
+
+			ui.refreshStatus()
 		}
 
-		if cur == buf {
+		// If viewing this buffer, append to display.
+		if ui.buffers[ui.currentBuffer] == buf {
 			_, _ = fmt.Fprintln(ui.messages, line)
 		}
 	})
 }
 
-// AddStatus adds a line to the status buffer.
+// AddStatus adds a line to the status buffer (buffer 0).
 func (ui *UI) AddStatus(line string) {
 	ts := time.Now().Format("15:04")
+
 	ui.AddLine(
 		"(status)",
-		"[gray]"+ts+"[white] "+line,
+		fmt.Sprintf("[gray]%s[white] %s", ts, line),
 	)
 }
 
@@ -117,12 +112,11 @@ func (ui *UI) SwitchBuffer(n int) {
 		}
 
 		ui.messages.ScrollToEnd()
-		ui.refreshStatusBar()
+		ui.refreshStatus()
 	})
 }
 
-// SwitchToBuffer switches to named buffer, creating if
+// SwitchToBuffer switches to the named buffer, creating it
-// needed.
 func (ui *UI) SwitchToBuffer(name string) {
 	ui.app.QueueUpdateDraw(func() {
 		buf := ui.getOrCreateBuffer(name)
@@ -144,7 +138,7 @@ func (ui *UI) SwitchToBuffer(name string) {
 		}
 
 		ui.messages.ScrollToEnd()
-		ui.refreshStatusBar()
+		ui.refreshStatus()
 	})
 }
 
@@ -153,7 +147,7 @@ func (ui *UI) SetStatus(
 	nick, target, connStatus string,
 ) {
 	ui.app.QueueUpdateDraw(func() {
-		ui.renderStatusBar(nick, target, connStatus)
+		ui.refreshStatusWith(nick, target, connStatus)
 	})
 }
 
@@ -162,7 +156,7 @@ func (ui *UI) BufferCount() int {
 	return len(ui.buffers)
 }
 
-// BufferIndex returns the index of a named buffer.
+// BufferIndex returns the index of a named buffer, or -1.
 func (ui *UI) BufferIndex(name string) int {
 	for i, buf := range ui.buffers {
 		if buf.Name == name {
@@ -173,7 +167,7 @@ func (ui *UI) BufferIndex(name string) int {
 	return -1
 }
 
-func (ui *UI) initMessages() {
+func (ui *UI) setupMessages() {
 	ui.messages = tview.NewTextView().
 		SetDynamicColors(true).
 		SetScrollable(true).
@@ -184,14 +178,14 @@ func (ui *UI) initMessages() {
 	ui.messages.SetBorder(false)
 }
 
-func (ui *UI) initStatusBar() {
+func (ui *UI) setupStatusBar() {
 	ui.statusBar = tview.NewTextView().
 		SetDynamicColors(true)
 	ui.statusBar.SetBackgroundColor(tcell.ColorNavy)
 	ui.statusBar.SetTextColor(tcell.ColorWhite)
 }
 
-func (ui *UI) initInput() {
+func (ui *UI) setupInput() {
 	ui.input = tview.NewInputField().
 		SetFieldBackgroundColor(tcell.ColorBlack).
 		SetFieldTextColor(tcell.ColorWhite)
@@ -214,7 +208,7 @@ func (ui *UI) initInput() {
 	})
 }
 
-func (ui *UI) initKeyCapture() {
+func (ui *UI) setupKeybindings() {
 	ui.app.SetInputCapture(
 		func(event *tcell.EventKey) *tcell.EventKey {
 			if event.Modifiers()&tcell.ModAlt == 0 {
@@ -234,21 +228,34 @@ func (ui *UI) initKeyCapture() {
 	)
 }
 
-func (ui *UI) refreshStatusBar() {
+func (ui *UI) setupLayout() {
-	// Placeholder; full refresh needs nick/target context.
+	ui.layout = tview.NewFlex().
+		SetDirection(tview.FlexRow).
+		AddItem(ui.messages, 0, 1, false).
+		AddItem(ui.statusBar, 1, 0, false).
+		AddItem(ui.input, 1, 0, true)
+
+	ui.app.SetRoot(ui.layout, true)
+	ui.app.SetFocus(ui.input)
 }
 
-func (ui *UI) renderStatusBar(
+// if needed.
+
+func (ui *UI) refreshStatus() {
+	// Rebuilt from app state by parent QueueUpdateDraw.
+}
+
+func (ui *UI) refreshStatusWith(
 	nick, target, connStatus string,
 ) {
 	var unreadParts []string
 
 	for i, buf := range ui.buffers {
 		if buf.Unread > 0 {
-			unreadParts = append(unreadParts,
+			unreadParts = append(
+				unreadParts,
 				fmt.Sprintf(
-					"%d:%s(%d)",
+					"%d:%s(%d)", i, buf.Name, buf.Unread,
-					i, buf.Name, buf.Unread,
 				),
 			)
 		}
@@ -268,8 +275,8 @@ func (ui *UI) renderStatusBar(
 
 	ui.statusBar.Clear()
 
-	_, _ = fmt.Fprintf(ui.statusBar,
+	_, _ = fmt.Fprintf(
-		" [%s] %s %s %s%s",
+		ui.statusBar, " [%s] %s %s %s%s",
 		connStatus, nick, bufInfo, target, unread,
 	)
 }

internal/broker/broker.go

@@ -1,65 +0,0 @@
-// Package broker provides an in-memory pub/sub for long-poll notifications.
-package broker
-
-import (
-	"sync"
-)
-
-// Broker notifies waiting clients when new messages are available.
-type Broker struct {
-	mu        sync.Mutex
-	listeners map[int64][]chan struct{} // userID -> list of waiting channels
-}
-
-// New creates a new Broker.
-func New() *Broker {
-	return &Broker{
-		listeners: make(map[int64][]chan struct{}),
-	}
-}
-
-// Wait returns a channel that will be closed when a message is available for the user.
-func (b *Broker) Wait(userID int64) chan struct{} {
-	ch := make(chan struct{}, 1)
-
-	b.mu.Lock()
-	b.listeners[userID] = append(b.listeners[userID], ch)
-	b.mu.Unlock()
-
-	return ch
-}
-
-// Notify wakes up all waiting clients for a user.
-func (b *Broker) Notify(userID int64) {
-	b.mu.Lock()
-	waiters := b.listeners[userID]
-	delete(b.listeners, userID)
-	b.mu.Unlock()
-
-	for _, ch := range waiters {
-		select {
-		case ch <- struct{}{}:
-		default:
-		}
-	}
-}
-
-// Remove removes a specific wait channel (for cleanup on timeout).
-func (b *Broker) Remove(userID int64, ch chan struct{}) {
-	b.mu.Lock()
-	defer b.mu.Unlock()
-
-	waiters := b.listeners[userID]
-
-	for i, w := range waiters {
-		if w == ch {
-			b.listeners[userID] = append(waiters[:i], waiters[i+1:]...)
-
-			break
-		}
-	}
-
-	if len(b.listeners[userID]) == 0 {
-		delete(b.listeners, userID)
-	}
-}

internal/broker/broker_test.go

@@ -1,118 +0,0 @@
-package broker_test
-
-import (
-	"sync"
-	"testing"
-	"time"
-
-	"git.eeqj.de/sneak/chat/internal/broker"
-)
-
-func TestNewBroker(t *testing.T) {
-	t.Parallel()
-
-	b := broker.New()
-	if b == nil {
-		t.Fatal("expected non-nil broker")
-	}
-}
-
-func TestWaitAndNotify(t *testing.T) {
-	t.Parallel()
-
-	b := broker.New()
-	ch := b.Wait(1)
-
-	go func() {
-		time.Sleep(10 * time.Millisecond)
-		b.Notify(1)
-	}()
-
-	select {
-	case <-ch:
-	case <-time.After(2 * time.Second):
-		t.Fatal("timeout")
-	}
-}
-
-func TestNotifyWithoutWaiters(t *testing.T) {
-	t.Parallel()
-
-	b := broker.New()
-	b.Notify(42) // should not panic
-}
-
-func TestRemove(t *testing.T) {
-	t.Parallel()
-
-	b := broker.New()
-	ch := b.Wait(1)
-	b.Remove(1, ch)
-
-	b.Notify(1)
-
-	select {
-	case <-ch:
-		t.Fatal("should not receive after remove")
-	case <-time.After(50 * time.Millisecond):
-	}
-}
-
-func TestMultipleWaiters(t *testing.T) {
-	t.Parallel()
-
-	b := broker.New()
-	ch1 := b.Wait(1)
-	ch2 := b.Wait(1)
-
-	b.Notify(1)
-
-	select {
-	case <-ch1:
-	case <-time.After(time.Second):
-		t.Fatal("ch1 timeout")
-	}
-
-	select {
-	case <-ch2:
-	case <-time.After(time.Second):
-		t.Fatal("ch2 timeout")
-	}
-}
-
-func TestConcurrentWaitNotify(t *testing.T) {
-	t.Parallel()
-
-	b := broker.New()
-
-	var wg sync.WaitGroup
-
-	const concurrency = 100
-
-	for i := range concurrency {
-		wg.Add(1)
-
-		go func(uid int64) {
-			defer wg.Done()
-
-			ch := b.Wait(uid)
-			b.Notify(uid)
-
-			select {
-			case <-ch:
-			case <-time.After(time.Second):
-				t.Error("timeout")
-			}
-		}(int64(i % 10))
-	}
-
-	wg.Wait()
-}
-
-func TestRemoveNonexistent(t *testing.T) {
-	t.Parallel()
-
-	b := broker.New()
-	ch := make(chan struct{}, 1)
-	b.Remove(999, ch) // should not panic
-}

internal/db/db.go

@@ -11,16 +11,20 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"time"
 
 	"git.eeqj.de/sneak/chat/internal/config"
 	"git.eeqj.de/sneak/chat/internal/logger"
+	"git.eeqj.de/sneak/chat/internal/models"
 	"go.uber.org/fx"
 
-	_ "github.com/joho/godotenv/autoload" // .env
+	_ "github.com/joho/godotenv/autoload" // loads .env file
-	_ "modernc.org/sqlite"                // driver
+	_ "modernc.org/sqlite"                // SQLite driver
 )
 
-const minMigrationParts = 2
+const (
+	minMigrationParts = 2
+)
 
 // SchemaFiles contains embedded SQL migration files.
 //
@@ -35,18 +39,15 @@ type Params struct {
 	Config *config.Config
 }
 
-// Database manages the SQLite connection and migrations.
+// Database manages the SQLite database connection and migrations.
 type Database struct {
 	db     *sql.DB
 	log    *slog.Logger
 	params *Params
 }
 
-// New creates a new Database and registers lifecycle hooks.
+// New creates a new Database instance and registers lifecycle hooks.
-func New(
+func New(lc fx.Lifecycle, params Params) (*Database, error) {
-	lc fx.Lifecycle,
-	params Params,
-) (*Database, error) {
 	s := new(Database)
 	s.params = &params
 	s.log = params.Logger.Get()
@@ -73,11 +74,460 @@ func New(
 	return s, nil
 }
 
+// NewTest creates a Database for testing, bypassing fx lifecycle.
+// It connects to the given DSN and runs all migrations.
+func NewTest(dsn string) (*Database, error) {
+	d, err := sql.Open("sqlite", dsn)
+	if err != nil {
+		return nil, err
+	}
+
+	s := &Database{
+		db:  d,
+		log: slog.Default(),
+	}
+
+	// Item 9: Enable foreign keys
+	_, err = d.Exec("PRAGMA foreign_keys = ON") //nolint:noctx,nolintlint // no context in sql.Open path
+	if err != nil {
+		_ = d.Close()
+
+		return nil, fmt.Errorf("enable foreign keys: %w", err)
+	}
+
+	ctx := context.Background()
+
+	err = s.runMigrations(ctx)
+	if err != nil {
+		_ = d.Close()
+
+		return nil, err
+	}
+
+	return s, nil
+}
+
 // GetDB returns the underlying sql.DB connection.
 func (s *Database) GetDB() *sql.DB {
 	return s.db
 }
 
+// Hydrate injects the database reference into any model that
+// embeds Base.
+func (s *Database) Hydrate(m interface{ SetDB(d models.DB) }) {
+	m.SetDB(s)
+}
+
+// GetUserByID looks up a user by their ID.
+func (s *Database) GetUserByID(
+	ctx context.Context,
+	id string,
+) (*models.User, error) {
+	u := &models.User{}
+	s.Hydrate(u)
+
+	err := s.db.QueryRowContext(ctx, `
+		SELECT id, nick, password_hash, created_at, updated_at, last_seen_at
+		FROM users WHERE id = ?`,
+		id,
+	).Scan(
+		&u.ID, &u.Nick, &u.PasswordHash,
+		&u.CreatedAt, &u.UpdatedAt, &u.LastSeenAt,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return u, nil
+}
+
+// GetChannelByID looks up a channel by its ID.
+func (s *Database) GetChannelByID(
+	ctx context.Context,
+	id string,
+) (*models.Channel, error) {
+	c := &models.Channel{}
+	s.Hydrate(c)
+
+	err := s.db.QueryRowContext(ctx, `
+		SELECT id, name, topic, modes, created_at, updated_at
+		FROM channels WHERE id = ?`,
+		id,
+	).Scan(
+		&c.ID, &c.Name, &c.Topic, &c.Modes,
+		&c.CreatedAt, &c.UpdatedAt,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return c, nil
+}
+
+// GetUserByNickModel looks up a user by their nick.
+func (s *Database) GetUserByNickModel(
+	ctx context.Context,
+	nick string,
+) (*models.User, error) {
+	u := &models.User{}
+	s.Hydrate(u)
+
+	err := s.db.QueryRowContext(ctx, `
+		SELECT id, nick, password_hash, created_at, updated_at, last_seen_at
+		FROM users WHERE nick = ?`,
+		nick,
+	).Scan(
+		&u.ID, &u.Nick, &u.PasswordHash,
+		&u.CreatedAt, &u.UpdatedAt, &u.LastSeenAt,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return u, nil
+}
+
+// GetUserByTokenModel looks up a user by their auth token.
+func (s *Database) GetUserByTokenModel(
+	ctx context.Context,
+	token string,
+) (*models.User, error) {
+	u := &models.User{}
+	s.Hydrate(u)
+
+	err := s.db.QueryRowContext(ctx, `
+		SELECT u.id, u.nick, u.password_hash,
+		       u.created_at, u.updated_at, u.last_seen_at
+		FROM users u
+		JOIN auth_tokens t ON t.user_id = u.id
+		WHERE t.token = ?`,
+		token,
+	).Scan(
+		&u.ID, &u.Nick, &u.PasswordHash,
+		&u.CreatedAt, &u.UpdatedAt, &u.LastSeenAt,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return u, nil
+}
+
+// DeleteAuthToken removes an auth token from the database.
+func (s *Database) DeleteAuthToken(
+	ctx context.Context,
+	token string,
+) error {
+	_, err := s.db.ExecContext(ctx,
+		`DELETE FROM auth_tokens WHERE token = ?`, token,
+	)
+
+	return err
+}
+
+// UpdateUserLastSeen updates the last_seen_at timestamp for a user.
+func (s *Database) UpdateUserLastSeen(
+	ctx context.Context,
+	userID string,
+) error {
+	_, err := s.db.ExecContext(ctx,
+		`UPDATE users SET last_seen_at = CURRENT_TIMESTAMP WHERE id = ?`,
+		userID,
+	)
+
+	return err
+}
+
+// CreateUserModel inserts a new user into the database.
+func (s *Database) CreateUserModel(
+	ctx context.Context,
+	id, nick, passwordHash string,
+) (*models.User, error) {
+	now := time.Now()
+
+	_, err := s.db.ExecContext(ctx,
+		`INSERT INTO users (id, nick, password_hash)
+		 VALUES (?, ?, ?)`,
+		id, nick, passwordHash,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	u := &models.User{
+		ID: id, Nick: nick, PasswordHash: passwordHash,
+		CreatedAt: now, UpdatedAt: now,
+	}
+	s.Hydrate(u)
+
+	return u, nil
+}
+
+// CreateChannel inserts a new channel into the database.
+func (s *Database) CreateChannel(
+	ctx context.Context,
+	id, name, topic, modes string,
+) (*models.Channel, error) {
+	now := time.Now()
+
+	_, err := s.db.ExecContext(ctx,
+		`INSERT INTO channels (id, name, topic, modes)
+		 VALUES (?, ?, ?, ?)`,
+		id, name, topic, modes,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	c := &models.Channel{
+		ID: id, Name: name, Topic: topic, Modes: modes,
+		CreatedAt: now, UpdatedAt: now,
+	}
+	s.Hydrate(c)
+
+	return c, nil
+}
+
+// AddChannelMember adds a user to a channel with the given modes.
+func (s *Database) AddChannelMember(
+	ctx context.Context,
+	channelID, userID, modes string,
+) (*models.ChannelMember, error) {
+	now := time.Now()
+
+	_, err := s.db.ExecContext(ctx,
+		`INSERT INTO channel_members
+		 (channel_id, user_id, modes)
+		 VALUES (?, ?, ?)`,
+		channelID, userID, modes,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	cm := &models.ChannelMember{
+		ChannelID: channelID,
+		UserID:    userID,
+		Modes:     modes,
+		JoinedAt:  now,
+	}
+	s.Hydrate(cm)
+
+	return cm, nil
+}
+
+// CreateMessage inserts a new message into the database.
+func (s *Database) CreateMessage(
+	ctx context.Context,
+	id, fromUserID, fromNick, target, msgType, body string,
+) (*models.Message, error) {
+	now := time.Now()
+
+	_, err := s.db.ExecContext(ctx,
+		`INSERT INTO messages
+		 (id, from_user_id, from_nick, target, type, body)
+		 VALUES (?, ?, ?, ?, ?, ?)`,
+		id, fromUserID, fromNick, target, msgType, body,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	m := &models.Message{
+		ID:         id,
+		FromUserID: fromUserID,
+		FromNick:   fromNick,
+		Target:     target,
+		Type:       msgType,
+		Body:       body,
+		Timestamp:  now,
+		CreatedAt:  now,
+	}
+	s.Hydrate(m)
+
+	return m, nil
+}
+
+// QueueMessage adds a message to a user's delivery queue.
+func (s *Database) QueueMessage(
+	ctx context.Context,
+	userID, messageID string,
+) (*models.MessageQueueEntry, error) {
+	now := time.Now()
+
+	res, err := s.db.ExecContext(ctx,
+		`INSERT INTO message_queue (user_id, message_id)
+		 VALUES (?, ?)`,
+		userID, messageID,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	entryID, err := res.LastInsertId()
+	if err != nil {
+		return nil, fmt.Errorf("get last insert id: %w", err)
+	}
+
+	mq := &models.MessageQueueEntry{
+		ID:        entryID,
+		UserID:    userID,
+		MessageID: messageID,
+		QueuedAt:  now,
+	}
+	s.Hydrate(mq)
+
+	return mq, nil
+}
+
+// DequeueMessages returns up to limit pending messages for a user,
+// ordered by queue time (oldest first).
+func (s *Database) DequeueMessages(
+	ctx context.Context,
+	userID string,
+	limit int,
+) ([]*models.MessageQueueEntry, error) {
+	rows, err := s.db.QueryContext(ctx, `
+		SELECT id, user_id, message_id, queued_at
+		FROM message_queue
+		WHERE user_id = ?
+		ORDER BY queued_at ASC
+		LIMIT ?`,
+		userID, limit,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() { _ = rows.Close() }()
+
+	entries := []*models.MessageQueueEntry{}
+
+	for rows.Next() {
+		e := &models.MessageQueueEntry{}
+		s.Hydrate(e)
+
+		err = rows.Scan(&e.ID, &e.UserID, &e.MessageID, &e.QueuedAt)
+		if err != nil {
+			return nil, err
+		}
+
+		entries = append(entries, e)
+	}
+
+	return entries, rows.Err()
+}
+
+// AckMessages removes the given queue entry IDs, marking them as delivered.
+func (s *Database) AckMessages(
+	ctx context.Context,
+	entryIDs []int64,
+) error {
+	if len(entryIDs) == 0 {
+		return nil
+	}
+
+	placeholders := make([]string, len(entryIDs))
+	args := make([]any, len(entryIDs))
+
+	for i, id := range entryIDs {
+		placeholders[i] = "?"
+		args[i] = id
+	}
+
+	query := fmt.Sprintf( //nolint:gosec // placeholders are ?, not user input
+		"DELETE FROM message_queue WHERE id IN (%s)",
+		strings.Join(placeholders, ","),
+	)
+
+	_, err := s.db.ExecContext(ctx, query, args...)
+
+	return err
+}
+
+// CreateAuthToken inserts a new auth token for a user.
+func (s *Database) CreateAuthToken(
+	ctx context.Context,
+	token, userID string,
+) (*models.AuthToken, error) {
+	now := time.Now()
+
+	_, err := s.db.ExecContext(ctx,
+		`INSERT INTO auth_tokens (token, user_id)
+		 VALUES (?, ?)`,
+		token, userID,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	at := &models.AuthToken{Token: token, UserID: userID, CreatedAt: now}
+	s.Hydrate(at)
+
+	return at, nil
+}
+
+// CreateSession inserts a new session for a user.
+func (s *Database) CreateSession(
+	ctx context.Context,
+	id, userID string,
+) (*models.Session, error) {
+	now := time.Now()
+
+	_, err := s.db.ExecContext(ctx,
+		`INSERT INTO sessions (id, user_id)
+		 VALUES (?, ?)`,
+		id, userID,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	sess := &models.Session{
+		ID: id, UserID: userID,
+		CreatedAt: now, LastActiveAt: now,
+	}
+	s.Hydrate(sess)
+
+	return sess, nil
+}
+
+// CreateServerLink inserts a new server link.
+func (s *Database) CreateServerLink(
+	ctx context.Context,
+	id, name, url, sharedKeyHash string,
+	isActive bool,
+) (*models.ServerLink, error) {
+	now := time.Now()
+	active := 0
+
+	if isActive {
+		active = 1
+	}
+
+	_, err := s.db.ExecContext(ctx,
+		`INSERT INTO server_links
+		 (id, name, url, shared_key_hash, is_active)
+		 VALUES (?, ?, ?, ?, ?)`,
+		id, name, url, sharedKeyHash, active,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	sl := &models.ServerLink{
+		ID:            id,
+		Name:          name,
+		URL:           url,
+		SharedKeyHash: sharedKeyHash,
+		IsActive:      isActive,
+		CreatedAt:     now,
+	}
+	s.Hydrate(sl)
+
+	return sl, nil
+}
+
 func (s *Database) connect(ctx context.Context) error {
 	dbURL := s.params.Config.DBURL
 	if dbURL == "" {
@@ -88,18 +538,14 @@ func (s *Database) connect(ctx context.Context) error {
 
 	d, err := sql.Open("sqlite", dbURL)
 	if err != nil {
-		s.log.Error(
+		s.log.Error("failed to open database", "error", err)
-			"failed to open database", "error", err,
-		)
 
 		return err
 	}
 
 	err = d.PingContext(ctx)
 	if err != nil {
-		s.log.Error(
+		s.log.Error("failed to ping database", "error", err)
-			"failed to ping database", "error", err,
-		)
 
 		return err
 	}
@@ -107,9 +553,8 @@ func (s *Database) connect(ctx context.Context) error {
 	s.db = d
 	s.log.Info("database connected")
 
-	_, err = s.db.ExecContext(
+	// Item 9: Enable foreign keys on every connection
-		ctx, "PRAGMA foreign_keys = ON",
+	_, err = s.db.ExecContext(ctx, "PRAGMA foreign_keys = ON")
-	)
 	if err != nil {
 		return fmt.Errorf("enable foreign keys: %w", err)
 	}
@@ -123,17 +568,10 @@ type migration struct {
 	sql     string
 }
 
-func (s *Database) runMigrations(
+func (s *Database) runMigrations(ctx context.Context) error {
-	ctx context.Context,
+	err := s.bootstrapMigrationsTable(ctx)
-) error {
-	_, err := s.db.ExecContext(ctx,
-		`CREATE TABLE IF NOT EXISTS schema_migrations (
-		 version INTEGER PRIMARY KEY,
-		 applied_at DATETIME DEFAULT CURRENT_TIMESTAMP)`)
 	if err != nil {
-		return fmt.Errorf(
+		return err
-			"create schema_migrations: %w", err,
-		)
 	}
 
 	migrations, err := s.loadMigrations()
@@ -141,11 +579,9 @@ func (s *Database) runMigrations(
 		return err
 	}
 
-	for _, m := range migrations {
+	err = s.applyMigrations(ctx, migrations)
-		err = s.applyMigration(ctx, m)
+	if err != nil {
-		if err != nil {
+		return err
-			return err
-		}
 	}
 
 	s.log.Info("database migrations complete")
@@ -153,87 +589,30 @@ func (s *Database) runMigrations(
 	return nil
 }
 
-func (s *Database) applyMigration(
+func (s *Database) bootstrapMigrationsTable(
 	ctx context.Context,
-	m migration,
 ) error {
-	var exists int
+	_, err := s.db.ExecContext(ctx,
-
+		`CREATE TABLE IF NOT EXISTS schema_migrations (
-	err := s.db.QueryRowContext(ctx,
+		version INTEGER PRIMARY KEY,
-		`SELECT COUNT(*) FROM schema_migrations
+		applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
-		 WHERE version = ?`,
+	)`)
-		m.version,
-	).Scan(&exists)
 	if err != nil {
 		return fmt.Errorf(
-			"check migration %d: %w", m.version, err,
+			"create schema_migrations table: %w", err,
 		)
 	}
 
-	if exists > 0 {
+	return nil
-		return nil
-	}
-
-	s.log.Info(
-		"applying migration",
-		"version", m.version,
-		"name", m.name,
-	)
-
-	return s.execMigration(ctx, m)
 }
 
-func (s *Database) execMigration(
+func (s *Database) loadMigrations() ([]migration, error) {
-	ctx context.Context,
-	m migration,
-) error {
-	tx, err := s.db.BeginTx(ctx, nil)
-	if err != nil {
-		return fmt.Errorf(
-			"begin tx for migration %d: %w",
-			m.version, err,
-		)
-	}
-
-	_, err = tx.ExecContext(ctx, m.sql)
-	if err != nil {
-		_ = tx.Rollback()
-
-		return fmt.Errorf(
-			"apply migration %d (%s): %w",
-			m.version, m.name, err,
-		)
-	}
-
-	_, err = tx.ExecContext(ctx,
-		`INSERT INTO schema_migrations (version)
-		 VALUES (?)`,
-		m.version,
-	)
-	if err != nil {
-		_ = tx.Rollback()
-
-		return fmt.Errorf(
-			"record migration %d: %w",
-			m.version, err,
-		)
-	}
-
-	return tx.Commit()
-}
-
-func (s *Database) loadMigrations() (
-	[]migration,
-	error,
-) {
 	entries, err := fs.ReadDir(SchemaFiles, "schema")
 	if err != nil {
-		return nil, fmt.Errorf(
+		return nil, fmt.Errorf("read schema dir: %w", err)
-			"read schema dir: %w", err,
-		)
 	}
 
-	var migrations []migration
+	migrations := make([]migration, 0, len(entries))
 
 	for _, entry := range entries {
 		if entry.IsDir() ||
@@ -248,18 +627,17 @@ func (s *Database) loadMigrations() (
 			continue
 		}
 
-		version, parseErr := strconv.Atoi(parts[0])
+		version, err := strconv.Atoi(parts[0])
-		if parseErr != nil {
+		if err != nil {
 			continue
 		}
 
-		content, readErr := SchemaFiles.ReadFile(
+		content, err := SchemaFiles.ReadFile(
 			"schema/" + entry.Name(),
 		)
-		if readErr != nil {
+		if err != nil {
 			return nil, fmt.Errorf(
-				"read migration %s: %w",
+				"read migration %s: %w", entry.Name(), err,
-				entry.Name(), readErr,
 			)
 		}
 
@@ -276,3 +654,82 @@ func (s *Database) loadMigrations() (
 
 	return migrations, nil
 }
+
+// Item 4: Wrap each migration in a transaction
+func (s *Database) applyMigrations(
+	ctx context.Context,
+	migrations []migration,
+) error {
+	for _, m := range migrations {
+		var exists int
+
+		err := s.db.QueryRowContext(ctx,
+			"SELECT COUNT(*) FROM schema_migrations WHERE version = ?",
+			m.version,
+		).Scan(&exists)
+		if err != nil {
+			return fmt.Errorf(
+				"check migration %d: %w", m.version, err,
+			)
+		}
+
+		if exists > 0 {
+			continue
+		}
+
+		s.log.Info(
+			"applying migration",
+			"version", m.version, "name", m.name,
+		)
+
+		err = s.executeMigration(ctx, m)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *Database) executeMigration(
+	ctx context.Context,
+	m migration,
+) error {
+	tx, err := s.db.BeginTx(ctx, nil)
+	if err != nil {
+		return fmt.Errorf(
+			"begin tx for migration %d: %w", m.version, err,
+		)
+	}
+
+	_, err = tx.ExecContext(ctx, m.sql)
+	if err != nil {
+		_ = tx.Rollback()
+
+		return fmt.Errorf(
+			"apply migration %d (%s): %w",
+			m.version, m.name, err,
+		)
+	}
+
+	_, err = tx.ExecContext(ctx,
+		"INSERT INTO schema_migrations (version) VALUES (?)",
+		m.version,
+	)
+	if err != nil {
+		_ = tx.Rollback()
+
+		return fmt.Errorf(
+			"record migration %d: %w", m.version, err,
+		)
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		return fmt.Errorf(
+			"commit migration %d: %w", m.version, err,
+		)
+	}
+
+	return nil
+}

internal/db/db_test.go

@@ -0,0 +1,424 @@
+package db_test
+
+import (
+	"fmt"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"git.eeqj.de/sneak/chat/internal/db"
+)
+
+const (
+	nickAlice   = "alice"
+	nickBob     = "bob"
+	nickCharlie = "charlie"
+)
+
+// setupTestDB creates a fresh database in a temp directory with
+// all migrations applied.
+func setupTestDB(t *testing.T) *db.Database {
+	t.Helper()
+
+	dir := t.TempDir()
+	dsn := fmt.Sprintf(
+		"file:%s?_journal_mode=WAL",
+		filepath.Join(dir, "test.db"),
+	)
+
+	d, err := db.NewTest(dsn)
+	if err != nil {
+		t.Fatalf("failed to create test database: %v", err)
+	}
+
+	t.Cleanup(func() { _ = d.GetDB().Close() })
+
+	return d
+}
+
+func TestCreateUser(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	id, token, err := d.CreateUser(ctx, nickAlice)
+	if err != nil {
+		t.Fatalf("CreateUser: %v", err)
+	}
+
+	if id <= 0 {
+		t.Errorf("expected positive id, got %d", id)
+	}
+
+	if token == "" {
+		t.Error("expected non-empty token")
+	}
+}
+
+func TestGetUserByToken(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	_, token, _ := d.CreateUser(ctx, nickAlice)
+
+	id, nick, err := d.GetUserByToken(ctx, token)
+	if err != nil {
+		t.Fatalf("GetUserByToken: %v", err)
+	}
+
+	if id <= 0 || nick != nickAlice {
+		t.Errorf(
+			"got id=%d nick=%s, want nick=%s",
+			id, nick, nickAlice,
+		)
+	}
+}
+
+func TestGetUserByNick(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	origID, _, _ := d.CreateUser(ctx, nickAlice)
+
+	id, err := d.GetUserByNick(ctx, nickAlice)
+	if err != nil {
+		t.Fatalf("GetUserByNick: %v", err)
+	}
+
+	if id != origID {
+		t.Errorf("got id %d, want %d", id, origID)
+	}
+}
+
+func TestGetOrCreateChannel(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	id1, err := d.GetOrCreateChannel(ctx, "#general")
+	if err != nil {
+		t.Fatalf("GetOrCreateChannel: %v", err)
+	}
+
+	if id1 <= 0 {
+		t.Errorf("expected positive id, got %d", id1)
+	}
+
+	// Same channel returns same ID.
+	id2, err := d.GetOrCreateChannel(ctx, "#general")
+	if err != nil {
+		t.Fatalf("GetOrCreateChannel(2): %v", err)
+	}
+
+	if id1 != id2 {
+		t.Errorf("got different ids: %d vs %d", id1, id2)
+	}
+}
+
+func TestJoinAndListChannels(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid, _, _ := d.CreateUser(ctx, nickAlice)
+	ch1, _ := d.GetOrCreateChannel(ctx, "#alpha")
+	ch2, _ := d.GetOrCreateChannel(ctx, "#beta")
+
+	_ = d.JoinChannel(ctx, ch1, uid)
+	_ = d.JoinChannel(ctx, ch2, uid)
+
+	channels, err := d.ListChannels(ctx, uid)
+	if err != nil {
+		t.Fatalf("ListChannels: %v", err)
+	}
+
+	if len(channels) != 2 {
+		t.Fatalf("expected 2 channels, got %d", len(channels))
+	}
+}
+
+func TestListChannelsEmpty(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid, _, _ := d.CreateUser(ctx, nickAlice)
+
+	channels, err := d.ListChannels(ctx, uid)
+	if err != nil {
+		t.Fatalf("ListChannels: %v", err)
+	}
+
+	if len(channels) != 0 {
+		t.Errorf("expected 0 channels, got %d", len(channels))
+	}
+}
+
+func TestPartChannel(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid, _, _ := d.CreateUser(ctx, nickAlice)
+	chID, _ := d.GetOrCreateChannel(ctx, "#general")
+
+	_ = d.JoinChannel(ctx, chID, uid)
+	_ = d.PartChannel(ctx, chID, uid)
+
+	channels, err := d.ListChannels(ctx, uid)
+	if err != nil {
+		t.Fatalf("ListChannels: %v", err)
+	}
+
+	if len(channels) != 0 {
+		t.Errorf("expected 0 after part, got %d", len(channels))
+	}
+}
+
+func TestSendAndGetMessages(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid, _, _ := d.CreateUser(ctx, nickAlice)
+	chID, _ := d.GetOrCreateChannel(ctx, "#general")
+	_ = d.JoinChannel(ctx, chID, uid)
+
+	_, err := d.SendMessage(ctx, chID, uid, "hello world")
+	if err != nil {
+		t.Fatalf("SendMessage: %v", err)
+	}
+
+	msgs, err := d.GetMessages(ctx, chID, 0, 0)
+	if err != nil {
+		t.Fatalf("GetMessages: %v", err)
+	}
+
+	if len(msgs) != 1 {
+		t.Fatalf("expected 1 message, got %d", len(msgs))
+	}
+
+	if msgs[0].Content != "hello world" {
+		t.Errorf(
+			"got content %q, want %q",
+			msgs[0].Content, "hello world",
+		)
+	}
+}
+
+func TestChannelMembers(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid1, _, _ := d.CreateUser(ctx, nickAlice)
+	uid2, _, _ := d.CreateUser(ctx, nickBob)
+	uid3, _, _ := d.CreateUser(ctx, nickCharlie)
+	chID, _ := d.GetOrCreateChannel(ctx, "#general")
+
+	_ = d.JoinChannel(ctx, chID, uid1)
+	_ = d.JoinChannel(ctx, chID, uid2)
+	_ = d.JoinChannel(ctx, chID, uid3)
+
+	members, err := d.ChannelMembers(ctx, chID)
+	if err != nil {
+		t.Fatalf("ChannelMembers: %v", err)
+	}
+
+	if len(members) != 3 {
+		t.Fatalf("expected 3 members, got %d", len(members))
+	}
+}
+
+func TestChannelMembersEmpty(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	chID, _ := d.GetOrCreateChannel(ctx, "#empty")
+
+	members, err := d.ChannelMembers(ctx, chID)
+	if err != nil {
+		t.Fatalf("ChannelMembers: %v", err)
+	}
+
+	if len(members) != 0 {
+		t.Errorf("expected 0, got %d", len(members))
+	}
+}
+
+func TestSendDM(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid1, _, _ := d.CreateUser(ctx, nickAlice)
+	uid2, _, _ := d.CreateUser(ctx, nickBob)
+
+	msgID, err := d.SendDM(ctx, uid1, uid2, "hey bob")
+	if err != nil {
+		t.Fatalf("SendDM: %v", err)
+	}
+
+	if msgID <= 0 {
+		t.Errorf("expected positive msgID, got %d", msgID)
+	}
+
+	msgs, err := d.GetDMs(ctx, uid1, uid2, 0, 0)
+	if err != nil {
+		t.Fatalf("GetDMs: %v", err)
+	}
+
+	if len(msgs) != 1 {
+		t.Fatalf("expected 1 DM, got %d", len(msgs))
+	}
+
+	if msgs[0].Content != "hey bob" {
+		t.Errorf("got %q, want %q", msgs[0].Content, "hey bob")
+	}
+}
+
+func TestPollMessages(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid1, _, _ := d.CreateUser(ctx, nickAlice)
+	uid2, _, _ := d.CreateUser(ctx, nickBob)
+	chID, _ := d.GetOrCreateChannel(ctx, "#general")
+
+	_ = d.JoinChannel(ctx, chID, uid1)
+	_ = d.JoinChannel(ctx, chID, uid2)
+
+	_, _ = d.SendMessage(ctx, chID, uid2, "hello")
+	_, _ = d.SendDM(ctx, uid2, uid1, "private")
+
+	time.Sleep(10 * time.Millisecond)
+
+	msgs, err := d.PollMessages(ctx, uid1, 0, 0)
+	if err != nil {
+		t.Fatalf("PollMessages: %v", err)
+	}
+
+	if len(msgs) < 2 {
+		t.Fatalf("expected >=2 messages, got %d", len(msgs))
+	}
+}
+
+func TestChangeNick(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	_, token, _ := d.CreateUser(ctx, nickAlice)
+
+	err := d.ChangeNick(ctx, 1, "alice2")
+	if err != nil {
+		t.Fatalf("ChangeNick: %v", err)
+	}
+
+	_, nick, err := d.GetUserByToken(ctx, token)
+	if err != nil {
+		t.Fatalf("GetUserByToken: %v", err)
+	}
+
+	if nick != "alice2" {
+		t.Errorf("got nick %q, want alice2", nick)
+	}
+}
+
+func TestSetTopic(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid, _, _ := d.CreateUser(ctx, nickAlice)
+	_, _ = d.GetOrCreateChannel(ctx, "#general")
+
+	err := d.SetTopic(ctx, "#general", uid, "new topic")
+	if err != nil {
+		t.Fatalf("SetTopic: %v", err)
+	}
+
+	channels, err := d.ListAllChannels(ctx)
+	if err != nil {
+		t.Fatalf("ListAllChannels: %v", err)
+	}
+
+	found := false
+
+	for _, ch := range channels {
+		if ch.Name == "#general" && ch.Topic == "new topic" {
+			found = true
+		}
+	}
+
+	if !found {
+		t.Error("topic was not updated")
+	}
+}
+
+func TestGetMessagesBefore(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	uid, _, _ := d.CreateUser(ctx, nickAlice)
+	chID, _ := d.GetOrCreateChannel(ctx, "#general")
+
+	_ = d.JoinChannel(ctx, chID, uid)
+
+	for i := range 5 {
+		_, _ = d.SendMessage(
+			ctx, chID, uid,
+			fmt.Sprintf("msg%d", i),
+		)
+
+		time.Sleep(10 * time.Millisecond)
+	}
+
+	msgs, err := d.GetMessagesBefore(ctx, chID, 0, 3)
+	if err != nil {
+		t.Fatalf("GetMessagesBefore: %v", err)
+	}
+
+	if len(msgs) != 3 {
+		t.Fatalf("expected 3, got %d", len(msgs))
+	}
+}
+
+func TestListAllChannels(t *testing.T) {
+	t.Parallel()
+
+	d := setupTestDB(t)
+	ctx := t.Context()
+
+	_, _ = d.GetOrCreateChannel(ctx, "#alpha")
+	_, _ = d.GetOrCreateChannel(ctx, "#beta")
+
+	channels, err := d.ListAllChannels(ctx)
+	if err != nil {
+		t.Fatalf("ListAllChannels: %v", err)
+	}
+
+	if len(channels) != 2 {
+		t.Errorf("expected 2, got %d", len(channels))
+	}
+}

internal/db/export_test.go

@@ -1,47 +0,0 @@
-package db
-
-import (
-	"context"
-	"database/sql"
-	"fmt"
-	"log/slog"
-	"sync/atomic"
-)
-
-//nolint:gochecknoglobals // test counter
-var testDBCounter atomic.Int64
-
-// NewTestDatabase creates an in-memory database for testing.
-func NewTestDatabase() (*Database, error) {
-	n := testDBCounter.Add(1)
-
-	dsn := fmt.Sprintf(
-		"file:testdb%d?mode=memory"+
-			"&cache=shared&_pragma=foreign_keys(1)",
-		n,
-	)
-
-	d, err := sql.Open("sqlite", dsn)
-	if err != nil {
-		return nil, err
-	}
-
-	database := &Database{db: d, log: slog.Default()}
-
-	err = database.runMigrations(context.Background())
-	if err != nil {
-		closeErr := d.Close()
-		if closeErr != nil {
-			return nil, closeErr
-		}
-
-		return nil, err
-	}
-
-	return database, nil
-}
-
-// Close closes the underlying database connection.
-func (s *Database) Close() error {
-	return s.db.Close()
-}

internal/db/queries.go

@@ -5,17 +5,14 @@ import (
 	"crypto/rand"
 	"database/sql"
 	"encoding/hex"
-	"encoding/json"
 	"fmt"
 	"time"
-
-	"github.com/google/uuid"
 )
 
 const (
-	tokenBytes       = 32
+	defaultMessageLimit = 50
-	defaultPollLimit = 100
+	defaultPollLimit    = 100
-	defaultHistLimit = 50
+	tokenBytes          = 32
 )
 
 func generateToken() string {
@@ -25,33 +22,8 @@ func generateToken() string {
 	return hex.EncodeToString(b)
 }
 
-// IRCMessage is the IRC envelope for all messages.
+// CreateUser registers a new user with the given nick and
-type IRCMessage struct {
+// returns the user with token.
-	ID      string          `json:"id"`
-	Command string          `json:"command"`
-	From    string          `json:"from,omitempty"`
-	To      string          `json:"to,omitempty"`
-	Body    json.RawMessage `json:"body,omitempty"`
-	TS      string          `json:"ts"`
-	Meta    json.RawMessage `json:"meta,omitempty"`
-	DBID    int64           `json:"-"`
-}
-
-// ChannelInfo is a lightweight channel representation.
-type ChannelInfo struct {
-	ID    int64  `json:"id"`
-	Name  string `json:"name"`
-	Topic string `json:"topic"`
-}
-
-// MemberInfo represents a channel member.
-type MemberInfo struct {
-	ID       int64     `json:"id"`
-	Nick     string    `json:"nick"`
-	LastSeen time.Time `json:"lastSeen"`
-}
-
-// CreateUser registers a new user with the given nick.
 func (s *Database) CreateUser(
 	ctx context.Context,
 	nick string,
@@ -60,9 +32,7 @@ func (s *Database) CreateUser(
 	now := time.Now()
 
 	res, err := s.db.ExecContext(ctx,
-		`INSERT INTO users
+		"INSERT INTO users (nick, token, created_at, last_seen) VALUES (?, ?, ?, ?)",
-		 (nick, token, created_at, last_seen)
-		 VALUES (?, ?, ?, ?)`,
 		nick, token, now, now)
 	if err != nil {
 		return 0, "", fmt.Errorf("create user: %w", err)
@@ -73,7 +43,8 @@ func (s *Database) CreateUser(
 	return id, token, nil
 }
 
-// GetUserByToken returns user id and nick for a token.
+// GetUserByToken returns user id and nick for a given auth
+// token.
 func (s *Database) GetUserByToken(
 	ctx context.Context,
 	token string,
@@ -91,6 +62,7 @@ func (s *Database) GetUserByToken(
 		return 0, "", err
 	}
 
+	// Update last_seen
 	_, _ = s.db.ExecContext(
 		ctx,
 		"UPDATE users SET last_seen = ? WHERE id = ?",
@@ -116,23 +88,8 @@ func (s *Database) GetUserByNick(
 	return id, err
 }
 
-// GetChannelByName returns the channel ID for a name.
+// GetOrCreateChannel returns the channel id, creating it if
-func (s *Database) GetChannelByName(
+// needed.
-	ctx context.Context,
-	name string,
-) (int64, error) {
-	var id int64
-
-	err := s.db.QueryRowContext(
-		ctx,
-		"SELECT id FROM channels WHERE name = ?",
-		name,
-	).Scan(&id)
-
-	return id, err
-}
-
-// GetOrCreateChannel returns channel id, creating if needed.
 func (s *Database) GetOrCreateChannel(
 	ctx context.Context,
 	name string,
@@ -151,9 +108,7 @@ func (s *Database) GetOrCreateChannel(
 	now := time.Now()
 
 	res, err := s.db.ExecContext(ctx,
-		`INSERT INTO channels
+		"INSERT INTO channels (name, created_at, updated_at) VALUES (?, ?, ?)",
-		 (name, created_at, updated_at)
-		 VALUES (?, ?, ?)`,
 		name, now, now)
 	if err != nil {
 		return 0, fmt.Errorf("create channel: %w", err)
@@ -170,9 +125,7 @@ func (s *Database) JoinChannel(
 	channelID, userID int64,
 ) error {
 	_, err := s.db.ExecContext(ctx,
-		`INSERT OR IGNORE INTO channel_members
+		"INSERT OR IGNORE INTO channel_members (channel_id, user_id, joined_at) VALUES (?, ?, ?)",
-		 (channel_id, user_id, joined_at)
-		 VALUES (?, ?, ?)`,
 		channelID, userID, time.Now())
 
 	return err
@@ -184,35 +137,35 @@ func (s *Database) PartChannel(
 	channelID, userID int64,
 ) error {
 	_, err := s.db.ExecContext(ctx,
-		`DELETE FROM channel_members
+		"DELETE FROM channel_members WHERE channel_id = ? AND user_id = ?",
-		 WHERE channel_id = ? AND user_id = ?`,
 		channelID, userID)
 
 	return err
 }
 
-// DeleteChannelIfEmpty removes a channel with no members.
+// ChannelInfo is a lightweight channel representation.
-func (s *Database) DeleteChannelIfEmpty(
+type ChannelInfo struct {
-	ctx context.Context,
+	ID    int64  `json:"id"`
-	channelID int64,
+	Name  string `json:"name"`
-) error {
+	Topic string `json:"topic"`
-	_, err := s.db.ExecContext(ctx,
-		`DELETE FROM channels WHERE id = ?
-		 AND NOT EXISTS
-		 (SELECT 1 FROM channel_members
-		  WHERE channel_id = ?)`,
-		channelID, channelID)
-
-	return err
 }
 
-// scanChannels scans rows into a ChannelInfo slice.
+// ListChannels returns all channels the user has joined.
-func scanChannels(
+func (s *Database) ListChannels(
-	rows *sql.Rows,
+	ctx context.Context,
+	userID int64,
 ) ([]ChannelInfo, error) {
+	rows, err := s.db.QueryContext(ctx,
+		`SELECT c.id, c.name, c.topic FROM channels c
+		 INNER JOIN channel_members cm ON cm.channel_id = c.id
+		 WHERE cm.user_id = ? ORDER BY c.name`, userID)
+	if err != nil {
+		return nil, err
+	}
+
 	defer func() { _ = rows.Close() }()
 
-	var out []ChannelInfo
+	var channels []ChannelInfo
 
 	for rows.Next() {
 		var ch ChannelInfo
@@ -222,52 +175,26 @@ func scanChannels(
 			return nil, err
 		}
 
-		out = append(out, ch)
+		channels = append(channels, ch)
 	}
 
-	err := rows.Err()
+	err = rows.Err()
 	if err != nil {
 		return nil, err
 	}
 
-	if out == nil {
+	if channels == nil {
-		out = []ChannelInfo{}
+		channels = []ChannelInfo{}
 	}
 
-	return out, nil
+	return channels, nil
 }
 
-// ListChannels returns channels the user has joined.
+// MemberInfo represents a channel member.
-func (s *Database) ListChannels(
+type MemberInfo struct {
-	ctx context.Context,
+	ID       int64     `json:"id"`
-	userID int64,
+	Nick     string    `json:"nick"`
-) ([]ChannelInfo, error) {
+	LastSeen time.Time `json:"lastSeen"`
-	rows, err := s.db.QueryContext(ctx,
-		`SELECT c.id, c.name, c.topic
-		 FROM channels c
-		 INNER JOIN channel_members cm
-		   ON cm.channel_id = c.id
-		 WHERE cm.user_id = ?
-		 ORDER BY c.name`, userID)
-	if err != nil {
-		return nil, err
-	}
-
-	return scanChannels(rows)
-}
-
-// ListAllChannels returns every channel.
-func (s *Database) ListAllChannels(
-	ctx context.Context,
-) ([]ChannelInfo, error) {
-	rows, err := s.db.QueryContext(ctx,
-		`SELECT id, name, topic
-		 FROM channels ORDER BY name`)
-	if err != nil {
-		return nil, err
-	}
-
-	return scanChannels(rows)
 }
 
 // ChannelMembers returns all members of a channel.
@@ -276,12 +203,9 @@ func (s *Database) ChannelMembers(
 	channelID int64,
 ) ([]MemberInfo, error) {
 	rows, err := s.db.QueryContext(ctx,
-		`SELECT u.id, u.nick, u.last_seen
+		`SELECT u.id, u.nick, u.last_seen FROM users u
-		 FROM users u
+		 INNER JOIN channel_members cm ON cm.user_id = u.id
-		 INNER JOIN channel_members cm
+		 WHERE cm.channel_id = ? ORDER BY u.nick`, channelID)
-		   ON cm.user_id = u.id
-		 WHERE cm.channel_id = ?
-		 ORDER BY u.nick`, channelID)
 	if err != nil {
 		return nil, err
 	}
@@ -293,7 +217,7 @@ func (s *Database) ChannelMembers(
 	for rows.Next() {
 		var m MemberInfo
 
-		err = rows.Scan(&m.ID, &m.Nick, &m.LastSeen)
+		err := rows.Scan(&m.ID, &m.Nick, &m.LastSeen)
 		if err != nil {
 			return nil, err
 		}
@@ -313,256 +237,407 @@ func (s *Database) ChannelMembers(
 	return members, nil
 }
 
-// scanInt64s scans rows into an int64 slice.
+// MessageInfo represents a chat message.
-func scanInt64s(rows *sql.Rows) ([]int64, error) {
+type MessageInfo struct {
+	ID        int64     `json:"id"`
+	Channel   string    `json:"channel,omitempty"`
+	Nick      string    `json:"nick"`
+	Content   string    `json:"content"`
+	IsDM      bool      `json:"isDm,omitempty"`
+	DMTarget  string    `json:"dmTarget,omitempty"`
+	CreatedAt time.Time `json:"createdAt"`
+}
+
+// GetMessages returns messages for a channel, optionally
+// after a given ID.
+func (s *Database) GetMessages(
+	ctx context.Context,
+	channelID int64,
+	afterID int64,
+	limit int,
+) ([]MessageInfo, error) {
+	if limit <= 0 {
+		limit = defaultMessageLimit
+	}
+
+	rows, err := s.db.QueryContext(ctx,
+		`SELECT m.id, c.name, u.nick, m.content, m.created_at
+		 FROM messages m
+		 INNER JOIN users u ON u.id = m.user_id
+		 INNER JOIN channels c ON c.id = m.channel_id
+		 WHERE m.channel_id = ? AND m.is_dm = 0 AND m.id > ?
+		 ORDER BY m.id ASC LIMIT ?`, channelID, afterID, limit)
+	if err != nil {
+		return nil, err
+	}
+
 	defer func() { _ = rows.Close() }()
 
-	var ids []int64
+	var msgs []MessageInfo
 
 	for rows.Next() {
-		var id int64
+		var m MessageInfo
 
-		err := rows.Scan(&id)
+		err := rows.Scan(
+			&m.ID, &m.Channel, &m.Nick,
+			&m.Content, &m.CreatedAt,
+		)
 		if err != nil {
 			return nil, err
 		}
 
-		ids = append(ids, id)
+		msgs = append(msgs, m)
 	}
 
-	err := rows.Err()
+	err = rows.Err()
 	if err != nil {
 		return nil, err
 	}
 
-	return ids, nil
+	if msgs == nil {
+		msgs = []MessageInfo{}
+	}
+
+	return msgs, nil
 }
 
-// GetChannelMemberIDs returns user IDs in a channel.
+// SendMessage inserts a channel message.
-func (s *Database) GetChannelMemberIDs(
+func (s *Database) SendMessage(
 	ctx context.Context,
-	channelID int64,
+	channelID, userID int64,
-) ([]int64, error) {
+	content string,
-	rows, err := s.db.QueryContext(ctx,
+) (int64, error) {
-		`SELECT user_id FROM channel_members
-		 WHERE channel_id = ?`, channelID)
-	if err != nil {
-		return nil, err
-	}
-
-	return scanInt64s(rows)
-}
-
-// GetUserChannelIDs returns channel IDs the user is in.
-func (s *Database) GetUserChannelIDs(
-	ctx context.Context,
-	userID int64,
-) ([]int64, error) {
-	rows, err := s.db.QueryContext(ctx,
-		`SELECT channel_id FROM channel_members
-		 WHERE user_id = ?`, userID)
-	if err != nil {
-		return nil, err
-	}
-
-	return scanInt64s(rows)
-}
-
-// InsertMessage stores a message and returns its DB ID.
-func (s *Database) InsertMessage(
-	ctx context.Context,
-	command, from, to string,
-	body json.RawMessage,
-	meta json.RawMessage,
-) (int64, string, error) {
-	msgUUID := uuid.New().String()
-	now := time.Now().UTC()
-
-	if body == nil {
-		body = json.RawMessage("[]")
-	}
-
-	if meta == nil {
-		meta = json.RawMessage("{}")
-	}
-
 	res, err := s.db.ExecContext(ctx,
-		`INSERT INTO messages
+		"INSERT INTO messages (channel_id, user_id, content, is_dm, created_at) VALUES (?, ?, ?, 0, ?)",
-		 (uuid, command, msg_from, msg_to,
+		channelID, userID, content, time.Now())
-		  body, meta, created_at)
-		 VALUES (?, ?, ?, ?, ?, ?, ?)`,
-		msgUUID, command, from, to,
-		string(body), string(meta), now)
 	if err != nil {
-		return 0, "", err
+		return 0, err
 	}
 
-	id, _ := res.LastInsertId()
+	return res.LastInsertId()
-
-	return id, msgUUID, nil
 }
 
-// EnqueueMessage adds a message to a user's queue.
+// SendDM inserts a direct message.
-func (s *Database) EnqueueMessage(
+func (s *Database) SendDM(
 	ctx context.Context,
-	userID, messageID int64,
+	fromID, toID int64,
-) error {
+	content string,
-	_, err := s.db.ExecContext(ctx,
+) (int64, error) {
-		`INSERT OR IGNORE INTO client_queues
+	res, err := s.db.ExecContext(ctx,
-		 (user_id, message_id, created_at)
+		"INSERT INTO messages (user_id, content, is_dm, dm_target_id, created_at) VALUES (?, ?, 1, ?, ?)",
-		 VALUES (?, ?, ?)`,
+		fromID, content, toID, time.Now())
-		userID, messageID, time.Now())
+	if err != nil {
+		return 0, err
+	}
 
-	return err
+	return res.LastInsertId()
 }
 
-// PollMessages returns queued messages for a user.
+// GetDMs returns direct messages between two users after a
+// given ID.
+func (s *Database) GetDMs(
+	ctx context.Context,
+	userA, userB int64,
+	afterID int64,
+	limit int,
+) ([]MessageInfo, error) {
+	if limit <= 0 {
+		limit = defaultMessageLimit
+	}
+
+	rows, err := s.db.QueryContext(ctx,
+		`SELECT m.id, u.nick, m.content, t.nick, m.created_at
+		 FROM messages m
+		 INNER JOIN users u ON u.id = m.user_id
+		 INNER JOIN users t ON t.id = m.dm_target_id
+		 WHERE m.is_dm = 1 AND m.id > ?
+		 AND ((m.user_id = ? AND m.dm_target_id = ?)
+		   OR (m.user_id = ? AND m.dm_target_id = ?))
+		 ORDER BY m.id ASC LIMIT ?`,
+		afterID, userA, userB, userB, userA, limit)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() { _ = rows.Close() }()
+
+	var msgs []MessageInfo
+
+	for rows.Next() {
+		var m MessageInfo
+
+		err := rows.Scan(
+			&m.ID, &m.Nick, &m.Content,
+			&m.DMTarget, &m.CreatedAt,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		m.IsDM = true
+
+		msgs = append(msgs, m)
+	}
+
+	err = rows.Err()
+	if err != nil {
+		return nil, err
+	}
+
+	if msgs == nil {
+		msgs = []MessageInfo{}
+	}
+
+	return msgs, nil
+}
+
+// PollMessages returns all new messages (channel + DM) for
+// a user after a given ID.
 func (s *Database) PollMessages(
 	ctx context.Context,
-	userID, afterQueueID int64,
+	userID int64,
+	afterID int64,
 	limit int,
-) ([]IRCMessage, int64, error) {
+) ([]MessageInfo, error) {
 	if limit <= 0 {
 		limit = defaultPollLimit
 	}
 
 	rows, err := s.db.QueryContext(ctx,
-		`SELECT cq.id, m.uuid, m.command,
+		`SELECT m.id, COALESCE(c.name, ''), u.nick, m.content,
-		   m.msg_from, m.msg_to,
+		        m.is_dm, COALESCE(t.nick, ''), m.created_at
-		   m.body, m.meta, m.created_at
+		 FROM messages m
-		 FROM client_queues cq
+		 INNER JOIN users u ON u.id = m.user_id
-		 INNER JOIN messages m
+		 LEFT JOIN channels c ON c.id = m.channel_id
-		   ON m.id = cq.message_id
+		 LEFT JOIN users t ON t.id = m.dm_target_id
-		 WHERE cq.user_id = ? AND cq.id > ?
+		 WHERE m.id > ? AND (
-		 ORDER BY cq.id ASC LIMIT ?`,
+		   (m.is_dm = 0 AND m.channel_id IN
-		userID, afterQueueID, limit)
+		     (SELECT channel_id FROM channel_members
-	if err != nil {
+		      WHERE user_id = ?))
-		return nil, afterQueueID, err
+		   OR (m.is_dm = 1
-	}
+		     AND (m.user_id = ? OR m.dm_target_id = ?))
-
+		 )
-	msgs, lastQID, scanErr := scanMessages(
+		 ORDER BY m.id ASC LIMIT ?`,
-		rows, afterQueueID,
+		afterID, userID, userID, userID, limit)
-	)
-	if scanErr != nil {
-		return nil, afterQueueID, scanErr
-	}
-
-	return msgs, lastQID, nil
-}
-
-// GetHistory returns message history for a target.
-func (s *Database) GetHistory(
-	ctx context.Context,
-	target string,
-	beforeID int64,
-	limit int,
-) ([]IRCMessage, error) {
-	if limit <= 0 {
-		limit = defaultHistLimit
-	}
-
-	rows, err := s.queryHistory(
-		ctx, target, beforeID, limit,
-	)
 	if err != nil {
 		return nil, err
 	}
 
-	msgs, _, scanErr := scanMessages(rows, 0)
+	defer func() { _ = rows.Close() }()
-	if scanErr != nil {
+
-		return nil, scanErr
+	msgs := make([]MessageInfo, 0)
+
+	for rows.Next() {
+		var (
+			m    MessageInfo
+			isDM int
+		)
+
+		err := rows.Scan(
+			&m.ID, &m.Channel, &m.Nick, &m.Content,
+			&isDM, &m.DMTarget, &m.CreatedAt,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		m.IsDM = isDM == 1
+		msgs = append(msgs, m)
 	}
 
-	if msgs == nil {
+	err = rows.Err()
-		msgs = []IRCMessage{}
+	if err != nil {
+		return nil, err
 	}
 
-	reverseMessages(msgs)
-
 	return msgs, nil
 }
 
-func (s *Database) queryHistory(
+func scanChannelMessages(
-	ctx context.Context,
-	target string,
-	beforeID int64,
-	limit int,
-) (*sql.Rows, error) {
-	if beforeID > 0 {
-		return s.db.QueryContext(ctx,
-			`SELECT id, uuid, command, msg_from,
-			   msg_to, body, meta, created_at
-			 FROM messages
-			 WHERE msg_to = ? AND id < ?
-			   AND command = 'PRIVMSG'
-			 ORDER BY id DESC LIMIT ?`,
-			target, beforeID, limit)
-	}
-
-	return s.db.QueryContext(ctx,
-		`SELECT id, uuid, command, msg_from,
-		   msg_to, body, meta, created_at
-		 FROM messages
-		 WHERE msg_to = ?
-		   AND command = 'PRIVMSG'
-		 ORDER BY id DESC LIMIT ?`,
-		target, limit)
-}
-
-func scanMessages(
 	rows *sql.Rows,
-	fallbackQID int64,
+) ([]MessageInfo, error) {
-) ([]IRCMessage, int64, error) {
+	var msgs []MessageInfo
-	defer func() { _ = rows.Close() }()
-
-	var msgs []IRCMessage
-
-	lastQID := fallbackQID
 
 	for rows.Next() {
-		var (
+		var m MessageInfo
-			m          IRCMessage
-			qID        int64
-			body, meta string
-			ts         time.Time
-		)
 
 		err := rows.Scan(
-			&qID, &m.ID, &m.Command,
+			&m.ID, &m.Channel, &m.Nick,
-			&m.From, &m.To,
+			&m.Content, &m.CreatedAt,
-			&body, &meta, &ts,
 		)
 		if err != nil {
-			return nil, fallbackQID, err
+			return nil, err
 		}
 
-		m.Body = json.RawMessage(body)
-		m.Meta = json.RawMessage(meta)
-		m.TS = ts.Format(time.RFC3339Nano)
-		m.DBID = qID
-		lastQID = qID
-
 		msgs = append(msgs, m)
 	}
 
 	err := rows.Err()
 	if err != nil {
-		return nil, fallbackQID, err
+		return nil, err
 	}
 
 	if msgs == nil {
-		msgs = []IRCMessage{}
+		msgs = []MessageInfo{}
 	}
 
-	return msgs, lastQID, nil
+	return msgs, nil
 }
 
-func reverseMessages(msgs []IRCMessage) {
+func scanDMMessages(
+	rows *sql.Rows,
+) ([]MessageInfo, error) {
+	var msgs []MessageInfo
+
+	for rows.Next() {
+		var m MessageInfo
+
+		err := rows.Scan(
+			&m.ID, &m.Nick, &m.Content,
+			&m.DMTarget, &m.CreatedAt,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		m.IsDM = true
+
+		msgs = append(msgs, m)
+	}
+
+	err := rows.Err()
+	if err != nil {
+		return nil, err
+	}
+
+	if msgs == nil {
+		msgs = []MessageInfo{}
+	}
+
+	return msgs, nil
+}
+
+func reverseMessages(msgs []MessageInfo) {
 	for i, j := 0, len(msgs)-1; i < j; i, j = i+1, j-1 {
 		msgs[i], msgs[j] = msgs[j], msgs[i]
 	}
 }
 
+// GetMessagesBefore returns channel messages before a given
+// ID (for history scrollback).
+func (s *Database) GetMessagesBefore(
+	ctx context.Context,
+	channelID int64,
+	beforeID int64,
+	limit int,
+) ([]MessageInfo, error) {
+	if limit <= 0 {
+		limit = defaultMessageLimit
+	}
+
+	var query string
+
+	var args []any
+
+	if beforeID > 0 {
+		query = `SELECT m.id, c.name, u.nick, m.content,
+		                m.created_at
+			FROM messages m
+			INNER JOIN users u ON u.id = m.user_id
+			INNER JOIN channels c ON c.id = m.channel_id
+			WHERE m.channel_id = ? AND m.is_dm = 0
+			  AND m.id < ?
+			ORDER BY m.id DESC LIMIT ?`
+		args = []any{channelID, beforeID, limit}
+	} else {
+		query = `SELECT m.id, c.name, u.nick, m.content,
+		                m.created_at
+			FROM messages m
+			INNER JOIN users u ON u.id = m.user_id
+			INNER JOIN channels c ON c.id = m.channel_id
+			WHERE m.channel_id = ? AND m.is_dm = 0
+			ORDER BY m.id DESC LIMIT ?`
+		args = []any{channelID, limit}
+	}
+
+	rows, err := s.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() { _ = rows.Close() }()
+
+	msgs, scanErr := scanChannelMessages(rows)
+	if scanErr != nil {
+		return nil, scanErr
+	}
+
+	// Reverse to ascending order.
+	reverseMessages(msgs)
+
+	return msgs, nil
+}
+
+// GetDMsBefore returns DMs between two users before a given
+// ID (for history scrollback).
+func (s *Database) GetDMsBefore(
+	ctx context.Context,
+	userA, userB int64,
+	beforeID int64,
+	limit int,
+) ([]MessageInfo, error) {
+	if limit <= 0 {
+		limit = defaultMessageLimit
+	}
+
+	var query string
+
+	var args []any
+
+	if beforeID > 0 {
+		query = `SELECT m.id, u.nick, m.content, t.nick,
+		                m.created_at
+			FROM messages m
+			INNER JOIN users u ON u.id = m.user_id
+			INNER JOIN users t ON t.id = m.dm_target_id
+			WHERE m.is_dm = 1 AND m.id < ?
+			AND ((m.user_id = ? AND m.dm_target_id = ?)
+			  OR (m.user_id = ? AND m.dm_target_id = ?))
+			ORDER BY m.id DESC LIMIT ?`
+		args = []any{
+			beforeID, userA, userB, userB, userA, limit,
+		}
+	} else {
+		query = `SELECT m.id, u.nick, m.content, t.nick,
+		                m.created_at
+			FROM messages m
+			INNER JOIN users u ON u.id = m.user_id
+			INNER JOIN users t ON t.id = m.dm_target_id
+			WHERE m.is_dm = 1
+			AND ((m.user_id = ? AND m.dm_target_id = ?)
+			  OR (m.user_id = ? AND m.dm_target_id = ?))
+			ORDER BY m.id DESC LIMIT ?`
+		args = []any{userA, userB, userB, userA, limit}
+	}
+
+	rows, err := s.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() { _ = rows.Close() }()
+
+	msgs, scanErr := scanDMMessages(rows)
+	if scanErr != nil {
+		return nil, scanErr
+	}
+
+	// Reverse to ascending order.
+	reverseMessages(msgs)
+
+	return msgs, nil
+}
+
 // ChangeNick updates a user's nickname.
 func (s *Database) ChangeNick(
 	ctx context.Context,
@@ -579,45 +654,58 @@ func (s *Database) ChangeNick(
 // SetTopic sets the topic for a channel.
 func (s *Database) SetTopic(
 	ctx context.Context,
-	channelName, topic string,
+	channelName string,
+	_ int64,
+	topic string,
 ) error {
 	_, err := s.db.ExecContext(ctx,
-		`UPDATE channels SET topic = ?,
+		"UPDATE channels SET topic = ? WHERE name = ?",
-		 updated_at = ? WHERE name = ?`,
+		topic, channelName)
-		topic, time.Now(), channelName)
 
 	return err
 }
 
-// DeleteUser removes a user and all their data.
+// GetServerName returns the server name (unused, config
-func (s *Database) DeleteUser(
+// provides this).
-	ctx context.Context,
+func (s *Database) GetServerName() string {
-	userID int64,
+	return ""
-) error {
-	_, err := s.db.ExecContext(
-		ctx,
-		"DELETE FROM users WHERE id = ?",
-		userID,
-	)
-
-	return err
 }
 
-// GetAllChannelMembershipsForUser returns channels
+// ListAllChannels returns all channels.
-// a user belongs to.
+func (s *Database) ListAllChannels(
-func (s *Database) GetAllChannelMembershipsForUser(
 	ctx context.Context,
-	userID int64,
 ) ([]ChannelInfo, error) {
 	rows, err := s.db.QueryContext(ctx,
-		`SELECT c.id, c.name, c.topic
+		"SELECT id, name, topic FROM channels ORDER BY name")
-		 FROM channels c
-		 INNER JOIN channel_members cm
-		   ON cm.channel_id = c.id
-		 WHERE cm.user_id = ?`, userID)
 	if err != nil {
 		return nil, err
 	}
 
-	return scanChannels(rows)
+	defer func() { _ = rows.Close() }()
+
+	var channels []ChannelInfo
+
+	for rows.Next() {
+		var ch ChannelInfo
+
+		err := rows.Scan(
+			&ch.ID, &ch.Name, &ch.Topic,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		channels = append(channels, ch)
+	}
+
+	err = rows.Err()
+	if err != nil {
+		return nil, err
+	}
+
+	if channels == nil {
+		channels = []ChannelInfo{}
+	}
+
+	return channels, nil
 }

internal/db/queries_test.go

@@ -1,550 +0,0 @@
-package db_test
-
-import (
-	"context"
-	"encoding/json"
-	"testing"
-
-	"git.eeqj.de/sneak/chat/internal/db"
-
-	_ "modernc.org/sqlite"
-)
-
-func setupTestDB(t *testing.T) *db.Database {
-	t.Helper()
-
-	d, err := db.NewTestDatabase()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	t.Cleanup(func() {
-		closeErr := d.Close()
-		if closeErr != nil {
-			t.Logf("close db: %v", closeErr)
-		}
-	})
-
-	return d
-}
-
-func TestCreateUser(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	id, token, err := database.CreateUser(ctx, "alice")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if id == 0 || token == "" {
-		t.Fatal("expected valid id and token")
-	}
-
-	_, _, err = database.CreateUser(ctx, "alice")
-	if err == nil {
-		t.Fatal("expected error for duplicate nick")
-	}
-}
-
-func TestGetUserByToken(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	_, token, err := database.CreateUser(ctx, "bob")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	id, nick, err := database.GetUserByToken(ctx, token)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if nick != "bob" || id == 0 {
-		t.Fatalf("expected bob, got %s", nick)
-	}
-
-	_, _, err = database.GetUserByToken(ctx, "badtoken")
-	if err == nil {
-		t.Fatal("expected error for bad token")
-	}
-}
-
-func TestGetUserByNick(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	_, _, err := database.CreateUser(ctx, "charlie")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	id, err := database.GetUserByNick(ctx, "charlie")
-	if err != nil || id == 0 {
-		t.Fatal("expected to find charlie")
-	}
-
-	_, err = database.GetUserByNick(ctx, "nobody")
-	if err == nil {
-		t.Fatal("expected error for unknown nick")
-	}
-}
-
-func TestChannelOperations(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	chID, err := database.GetOrCreateChannel(ctx, "#test")
-	if err != nil || chID == 0 {
-		t.Fatal("expected channel id")
-	}
-
-	chID2, err := database.GetOrCreateChannel(ctx, "#test")
-	if err != nil || chID2 != chID {
-		t.Fatal("expected same channel id")
-	}
-
-	chID3, err := database.GetChannelByName(ctx, "#test")
-	if err != nil || chID3 != chID {
-		t.Fatal("expected same channel id")
-	}
-
-	_, err = database.GetChannelByName(ctx, "#nope")
-	if err == nil {
-		t.Fatal("expected error for nonexistent channel")
-	}
-}
-
-func TestJoinAndPart(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	uid, _, err := database.CreateUser(ctx, "user1")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	chID, err := database.GetOrCreateChannel(ctx, "#chan")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.JoinChannel(ctx, chID, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	ids, err := database.GetChannelMemberIDs(ctx, chID)
-	if err != nil || len(ids) != 1 || ids[0] != uid {
-		t.Fatal("expected user in channel")
-	}
-
-	err = database.JoinChannel(ctx, chID, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.PartChannel(ctx, chID, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	ids, _ = database.GetChannelMemberIDs(ctx, chID)
-	if len(ids) != 0 {
-		t.Fatal("expected empty channel")
-	}
-}
-
-func TestDeleteChannelIfEmpty(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	chID, err := database.GetOrCreateChannel(
-		ctx, "#empty",
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	uid, _, err := database.CreateUser(ctx, "temp")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.JoinChannel(ctx, chID, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.PartChannel(ctx, chID, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.DeleteChannelIfEmpty(ctx, chID)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, err = database.GetChannelByName(ctx, "#empty")
-	if err == nil {
-		t.Fatal("expected channel to be deleted")
-	}
-}
-
-func createUserWithChannels(
-	t *testing.T,
-	database *db.Database,
-	nick, ch1Name, ch2Name string,
-) (int64, int64, int64) {
-	t.Helper()
-
-	ctx := context.Background()
-
-	uid, _, err := database.CreateUser(ctx, nick)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	ch1, err := database.GetOrCreateChannel(
-		ctx, ch1Name,
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	ch2, err := database.GetOrCreateChannel(
-		ctx, ch2Name,
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.JoinChannel(ctx, ch1, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.JoinChannel(ctx, ch2, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	return uid, ch1, ch2
-}
-
-func TestListChannels(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	uid, _, _ := createUserWithChannels(
-		t, database, "lister", "#a", "#b",
-	)
-
-	channels, err := database.ListChannels(
-		context.Background(), uid,
-	)
-	if err != nil || len(channels) != 2 {
-		t.Fatalf(
-			"expected 2 channels, got %d",
-			len(channels),
-		)
-	}
-}
-
-func TestListAllChannels(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	_, err := database.GetOrCreateChannel(ctx, "#x")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, err = database.GetOrCreateChannel(ctx, "#y")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	channels, err := database.ListAllChannels(ctx)
-	if err != nil || len(channels) < 2 {
-		t.Fatalf(
-			"expected >= 2 channels, got %d",
-			len(channels),
-		)
-	}
-}
-
-func TestChangeNick(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	uid, token, err := database.CreateUser(ctx, "old")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.ChangeNick(ctx, uid, "new")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, nick, err := database.GetUserByToken(ctx, token)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if nick != "new" {
-		t.Fatalf("expected new, got %s", nick)
-	}
-}
-
-func TestSetTopic(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	_, err := database.GetOrCreateChannel(
-		ctx, "#topictest",
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.SetTopic(ctx, "#topictest", "Hello")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	channels, err := database.ListAllChannels(ctx)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	for _, ch := range channels {
-		if ch.Name == "#topictest" &&
-			ch.Topic != "Hello" {
-			t.Fatalf(
-				"expected topic Hello, got %s",
-				ch.Topic,
-			)
-		}
-	}
-}
-
-func TestInsertAndPollMessages(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	uid, _, err := database.CreateUser(ctx, "poller")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	body := json.RawMessage(`["hello"]`)
-
-	dbID, msgUUID, err := database.InsertMessage(
-		ctx, "PRIVMSG", "poller", "#test", body, nil,
-	)
-	if err != nil || dbID == 0 || msgUUID == "" {
-		t.Fatal("insert failed")
-	}
-
-	err = database.EnqueueMessage(ctx, uid, dbID)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	const batchSize = 10
-
-	msgs, lastQID, err := database.PollMessages(
-		ctx, uid, 0, batchSize,
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if len(msgs) != 1 {
-		t.Fatalf(
-			"expected 1 message, got %d", len(msgs),
-		)
-	}
-
-	if msgs[0].Command != "PRIVMSG" {
-		t.Fatalf(
-			"expected PRIVMSG, got %s", msgs[0].Command,
-		)
-	}
-
-	if lastQID == 0 {
-		t.Fatal("expected nonzero lastQID")
-	}
-
-	msgs, _, _ = database.PollMessages(
-		ctx, uid, lastQID, batchSize,
-	)
-
-	if len(msgs) != 0 {
-		t.Fatalf(
-			"expected 0 messages, got %d", len(msgs),
-		)
-	}
-}
-
-func TestGetHistory(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	const msgCount = 10
-
-	for range msgCount {
-		_, _, err := database.InsertMessage(
-			ctx, "PRIVMSG", "user", "#hist",
-			json.RawMessage(`["msg"]`), nil,
-		)
-		if err != nil {
-			t.Fatal(err)
-		}
-	}
-
-	const histLimit = 5
-
-	msgs, err := database.GetHistory(
-		ctx, "#hist", 0, histLimit,
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if len(msgs) != histLimit {
-		t.Fatalf("expected %d, got %d",
-			histLimit, len(msgs))
-	}
-
-	if msgs[0].DBID > msgs[histLimit-1].DBID {
-		t.Fatal("expected ascending order")
-	}
-}
-
-func TestDeleteUser(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	uid, _, err := database.CreateUser(ctx, "deleteme")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	chID, err := database.GetOrCreateChannel(
-		ctx, "#delchan",
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.JoinChannel(ctx, chID, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.DeleteUser(ctx, uid)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, err = database.GetUserByNick(ctx, "deleteme")
-	if err == nil {
-		t.Fatal("user should be deleted")
-	}
-
-	ids, _ := database.GetChannelMemberIDs(ctx, chID)
-	if len(ids) != 0 {
-		t.Fatal("expected no members after deletion")
-	}
-}
-
-func TestChannelMembers(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	ctx := context.Background()
-
-	uid1, _, err := database.CreateUser(ctx, "m1")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	uid2, _, err := database.CreateUser(ctx, "m2")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	chID, err := database.GetOrCreateChannel(
-		ctx, "#members",
-	)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.JoinChannel(ctx, chID, uid1)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = database.JoinChannel(ctx, chID, uid2)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	members, err := database.ChannelMembers(ctx, chID)
-	if err != nil || len(members) != 2 {
-		t.Fatalf(
-			"expected 2 members, got %d",
-			len(members),
-		)
-	}
-}
-
-func TestGetAllChannelMembershipsForUser(t *testing.T) {
-	t.Parallel()
-
-	database := setupTestDB(t)
-	uid, _, _ := createUserWithChannels(
-		t, database, "multi", "#m1", "#m2",
-	)
-
-	channels, err :=
-		database.GetAllChannelMembershipsForUser(
-			context.Background(), uid,
-		)
-	if err != nil || len(channels) != 2 {
-		t.Fatalf(
-			"expected 2 channels, got %d",
-			len(channels),
-		)
-	}
-}

internal/db/schema/001_initial.sql

@@ -1,54 +1,4 @@
--- Chat server schema (pre-1.0 consolidated)
+CREATE TABLE IF NOT EXISTS schema_migrations (
-PRAGMA foreign_keys = ON;
+    version INTEGER PRIMARY KEY,
-
+    applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
--- Users: IRC-style sessions (no passwords, just nick + token)
-CREATE TABLE IF NOT EXISTS users (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    nick TEXT NOT NULL UNIQUE,
-    token TEXT NOT NULL UNIQUE,
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-    last_seen DATETIME DEFAULT CURRENT_TIMESTAMP
 );
-CREATE INDEX IF NOT EXISTS idx_users_token ON users(token);
-
--- Channels
-CREATE TABLE IF NOT EXISTS channels (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    name TEXT NOT NULL UNIQUE,
-    topic TEXT NOT NULL DEFAULT '',
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
-);
-
--- Channel members
-CREATE TABLE IF NOT EXISTS channel_members (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    channel_id INTEGER NOT NULL REFERENCES channels(id) ON DELETE CASCADE,
-    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-    joined_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-    UNIQUE(channel_id, user_id)
-);
-
--- Messages: IRC envelope format
-CREATE TABLE IF NOT EXISTS messages (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    uuid TEXT NOT NULL UNIQUE,
-    command TEXT NOT NULL DEFAULT 'PRIVMSG',
-    msg_from TEXT NOT NULL DEFAULT '',
-    msg_to TEXT NOT NULL DEFAULT '',
-    body TEXT NOT NULL DEFAULT '[]',
-    meta TEXT NOT NULL DEFAULT '{}',
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
-);
-CREATE INDEX IF NOT EXISTS idx_messages_to_id ON messages(msg_to, id);
-CREATE INDEX IF NOT EXISTS idx_messages_created ON messages(created_at);
-
--- Per-client message queues for fan-out delivery
-CREATE TABLE IF NOT EXISTS client_queues (
-    id INTEGER PRIMARY KEY AUTOINCREMENT,
-    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-    message_id INTEGER NOT NULL REFERENCES messages(id) ON DELETE CASCADE,
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-    UNIQUE(user_id, message_id)
-);
-CREATE INDEX IF NOT EXISTS idx_client_queues_user ON client_queues(user_id, id);

internal/db/schema/002_schema.sql

@@ -0,0 +1,89 @@
+-- All schema changes go into this file until 1.0.0 is tagged.
+-- There will not be migrations during the early development phase.
+-- After 1.0.0, new changes get their own numbered migration files.
+
+-- Users: accounts and authentication
+CREATE TABLE IF NOT EXISTS users (
+    id TEXT PRIMARY KEY,                           -- UUID
+    nick TEXT NOT NULL UNIQUE,
+    password_hash TEXT NOT NULL,
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    last_seen_at DATETIME
+);
+
+-- Auth tokens: one user can have multiple active tokens (multiple devices)
+CREATE TABLE IF NOT EXISTS auth_tokens (
+    token TEXT PRIMARY KEY,                        -- random token string
+    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    expires_at DATETIME,                           -- NULL = no expiry
+    last_used_at DATETIME
+);
+CREATE INDEX IF NOT EXISTS idx_auth_tokens_user_id ON auth_tokens(user_id);
+
+-- Channels: chat rooms
+CREATE TABLE IF NOT EXISTS channels (
+    id TEXT PRIMARY KEY,                           -- UUID
+    name TEXT NOT NULL UNIQUE,                     -- #general, etc.
+    topic TEXT NOT NULL DEFAULT '',
+    modes TEXT NOT NULL DEFAULT '',                -- +i, +m, +s, +t, +n
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Channel members: who is in which channel, with per-user modes
+CREATE TABLE IF NOT EXISTS channel_members (
+    channel_id TEXT NOT NULL REFERENCES channels(id) ON DELETE CASCADE,
+    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    modes TEXT NOT NULL DEFAULT '',                -- +o (operator), +v (voice)
+    joined_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (channel_id, user_id)
+);
+CREATE INDEX IF NOT EXISTS idx_channel_members_user_id ON channel_members(user_id);
+
+-- Messages: channel and DM history (rotated per MAX_HISTORY)
+CREATE TABLE IF NOT EXISTS messages (
+    id TEXT PRIMARY KEY,                           -- UUID
+    ts DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    from_user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    from_nick TEXT NOT NULL,                       -- denormalized for history
+    target TEXT NOT NULL,                          -- #channel name or user UUID for DMs
+    type TEXT NOT NULL DEFAULT 'message',          -- message, action, notice, join, part, quit, topic, mode, nick, system
+    body TEXT NOT NULL DEFAULT '',
+    meta TEXT NOT NULL DEFAULT '{}',               -- JSON extensible metadata
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+CREATE INDEX IF NOT EXISTS idx_messages_target_ts ON messages(target, ts);
+CREATE INDEX IF NOT EXISTS idx_messages_from_user ON messages(from_user_id);
+
+-- Message queue: per-user pending delivery (unread messages)
+CREATE TABLE IF NOT EXISTS message_queue (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    message_id TEXT NOT NULL REFERENCES messages(id) ON DELETE CASCADE,
+    queued_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(user_id, message_id)
+);
+CREATE INDEX IF NOT EXISTS idx_message_queue_user_id ON message_queue(user_id, queued_at);
+
+-- Sessions: server-held session state
+CREATE TABLE IF NOT EXISTS sessions (
+    id TEXT PRIMARY KEY,                           -- UUID
+    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    last_active_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    expires_at DATETIME                            -- idle timeout
+);
+CREATE INDEX IF NOT EXISTS idx_sessions_user_id ON sessions(user_id);
+
+-- Server links: federation peer configuration
+CREATE TABLE IF NOT EXISTS server_links (
+    id TEXT PRIMARY KEY,                           -- UUID
+    name TEXT NOT NULL UNIQUE,                     -- human-readable peer name
+    url TEXT NOT NULL,                             -- base URL of peer server
+    shared_key_hash TEXT NOT NULL,                 -- hashed shared secret
+    is_active INTEGER NOT NULL DEFAULT 1,
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    last_seen_at DATETIME
+);

internal/db/schema/003_users.sql

@@ -0,0 +1,53 @@
+-- Migration 003: Replace UUID-based tables with simple integer-keyed
+-- tables for the HTTP API.  Drops the 002 tables and recreates them.
+
+PRAGMA foreign_keys = OFF;
+
+DROP TABLE IF EXISTS message_queue;
+DROP TABLE IF EXISTS sessions;
+DROP TABLE IF EXISTS server_links;
+DROP TABLE IF EXISTS messages;
+DROP TABLE IF EXISTS channel_members;
+DROP TABLE IF EXISTS auth_tokens;
+DROP TABLE IF EXISTS channels;
+DROP TABLE IF EXISTS users;
+
+CREATE TABLE users (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    nick TEXT NOT NULL UNIQUE,
+    token TEXT NOT NULL UNIQUE,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    last_seen DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE channels (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL UNIQUE,
+    topic TEXT NOT NULL DEFAULT '',
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE channel_members (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    channel_id INTEGER NOT NULL REFERENCES channels(id) ON DELETE CASCADE,
+    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    joined_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(channel_id, user_id)
+);
+
+CREATE TABLE messages (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    channel_id INTEGER REFERENCES channels(id) ON DELETE CASCADE,
+    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    content TEXT NOT NULL,
+    is_dm INTEGER NOT NULL DEFAULT 0,
+    dm_target_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX idx_messages_channel ON messages(channel_id, created_at);
+CREATE INDEX idx_messages_dm ON messages(user_id, dm_target_id, created_at);
+CREATE INDEX idx_users_token ON users(token);
+
+PRAGMA foreign_keys = ON;

internal/handlers/handlers.go

@@ -4,11 +4,9 @@ package handlers
 import (
 	"context"
 	"encoding/json"
-	"errors"
 	"log/slog"
 	"net/http"
 
-	"git.eeqj.de/sneak/chat/internal/broker"
 	"git.eeqj.de/sneak/chat/internal/config"
 	"git.eeqj.de/sneak/chat/internal/db"
 	"git.eeqj.de/sneak/chat/internal/globals"
@@ -17,8 +15,6 @@ import (
 	"go.uber.org/fx"
 )
 
-var errUnauthorized = errors.New("unauthorized")
-
 // Params defines the dependencies for creating Handlers.
 type Params struct {
 	fx.In
@@ -35,19 +31,14 @@ type Handlers struct {
 	params *Params
 	log    *slog.Logger
 	hc     *healthcheck.Healthcheck
-	broker *broker.Broker
 }
 
 // New creates a new Handlers instance.
-func New(
+func New(lc fx.Lifecycle, params Params) (*Handlers, error) {
-	lc fx.Lifecycle,
-	params Params,
-) (*Handlers, error) {
 	s := new(Handlers)
 	s.params = &params
 	s.log = params.Logger.Get()
 	s.hc = params.Healthcheck
-	s.broker = broker.New()
 
 	lc.Append(fx.Hook{
 		OnStart: func(_ context.Context) error {
@@ -58,17 +49,9 @@ func New(
 	return s, nil
 }
 
-func (s *Handlers) respondJSON(
+func (s *Handlers) respondJSON(w http.ResponseWriter, _ *http.Request, data any, status int) {
-	w http.ResponseWriter,
-	_ *http.Request,
-	data any,
-	status int,
-) {
-	w.Header().Set(
-		"Content-Type",
-		"application/json; charset=utf-8",
-	)
 	w.WriteHeader(status)
+	w.Header().Set("Content-Type", "application/json")
 
 	if data != nil {
 		err := json.NewEncoder(w).Encode(data)

internal/models/auth_token.go

@@ -0,0 +1,26 @@
+package models
+
+import (
+	"context"
+	"time"
+)
+
+// AuthToken represents an authentication token for a user session.
+type AuthToken struct {
+	Base
+
+	Token      string     `json:"-"`
+	UserID     string     `json:"userId"`
+	CreatedAt  time.Time  `json:"createdAt"`
+	ExpiresAt  *time.Time `json:"expiresAt,omitempty"`
+	LastUsedAt *time.Time `json:"lastUsedAt,omitempty"`
+}
+
+// User returns the user who owns this token.
+func (t *AuthToken) User(ctx context.Context) (*User, error) {
+	if ul := t.GetUserLookup(); ul != nil {
+		return ul.GetUserByID(ctx, t.UserID)
+	}
+
+	return nil, ErrUserLookupNotAvailable
+}

internal/models/channel.go

@@ -0,0 +1,96 @@
+package models
+
+import (
+	"context"
+	"time"
+)
+
+// Channel represents a chat channel.
+type Channel struct {
+	Base
+
+	ID        string    `json:"id"`
+	Name      string    `json:"name"`
+	Topic     string    `json:"topic"`
+	Modes     string    `json:"modes"`
+	CreatedAt time.Time `json:"createdAt"`
+	UpdatedAt time.Time `json:"updatedAt"`
+}
+
+// Members returns all users who are members of this channel.
+func (c *Channel) Members(ctx context.Context) ([]*ChannelMember, error) {
+	rows, err := c.GetDB().QueryContext(ctx, `
+		SELECT cm.channel_id, cm.user_id, cm.modes, cm.joined_at,
+		       u.nick
+		FROM channel_members cm
+		JOIN users u ON u.id = cm.user_id
+		WHERE cm.channel_id = ?
+		ORDER BY cm.joined_at`,
+		c.ID,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() { _ = rows.Close() }()
+
+	members := []*ChannelMember{}
+
+	for rows.Next() {
+		m := &ChannelMember{}
+		m.SetDB(c.db)
+
+		err = rows.Scan(
+			&m.ChannelID, &m.UserID, &m.Modes,
+			&m.JoinedAt, &m.Nick,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		members = append(members, m)
+	}
+
+	return members, rows.Err()
+}
+
+// RecentMessages returns the most recent messages in this channel.
+func (c *Channel) RecentMessages(
+	ctx context.Context,
+	limit int,
+) ([]*Message, error) {
+	rows, err := c.GetDB().QueryContext(ctx, `
+		SELECT id, ts, from_user_id, from_nick,
+		       target, type, body, meta, created_at
+		FROM messages
+		WHERE target = ?
+		ORDER BY ts DESC
+		LIMIT ?`,
+		c.Name, limit,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() { _ = rows.Close() }()
+
+	messages := []*Message{}
+
+	for rows.Next() {
+		msg := &Message{}
+		msg.SetDB(c.db)
+
+		err = rows.Scan(
+			&msg.ID, &msg.Timestamp, &msg.FromUserID,
+			&msg.FromNick, &msg.Target, &msg.Type,
+			&msg.Body, &msg.Meta, &msg.CreatedAt,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		messages = append(messages, msg)
+	}
+
+	return messages, rows.Err()
+}

internal/models/channel_member.go

@@ -0,0 +1,35 @@
+package models
+
+import (
+	"context"
+	"time"
+)
+
+// ChannelMember represents a user's membership in a channel.
+type ChannelMember struct {
+	Base
+
+	ChannelID string    `json:"channelId"`
+	UserID    string    `json:"userId"`
+	Modes     string    `json:"modes"`
+	JoinedAt  time.Time `json:"joinedAt"`
+	Nick      string    `json:"nick"` // denormalized from users table
+}
+
+// User returns the full User for this membership.
+func (cm *ChannelMember) User(ctx context.Context) (*User, error) {
+	if ul := cm.GetUserLookup(); ul != nil {
+		return ul.GetUserByID(ctx, cm.UserID)
+	}
+
+	return nil, ErrUserLookupNotAvailable
+}
+
+// Channel returns the full Channel for this membership.
+func (cm *ChannelMember) Channel(ctx context.Context) (*Channel, error) {
+	if cl := cm.GetChannelLookup(); cl != nil {
+		return cl.GetChannelByID(ctx, cm.ChannelID)
+	}
+
+	return nil, ErrChannelLookupNotAvailable
+}

internal/models/message.go

@@ -0,0 +1,20 @@
+package models
+
+import (
+	"time"
+)
+
+// Message represents a chat message (channel or DM).
+type Message struct {
+	Base
+
+	ID         string    `json:"id"`
+	Timestamp  time.Time `json:"ts"`
+	FromUserID string    `json:"fromUserId"`
+	FromNick   string    `json:"from"`
+	Target     string    `json:"to"`
+	Type       string    `json:"type"`
+	Body       string    `json:"body"`
+	Meta       string    `json:"meta"`
+	CreatedAt  time.Time `json:"createdAt"`
+}

internal/models/message_queue.go

@@ -0,0 +1,15 @@
+package models
+
+import (
+	"time"
+)
+
+// MessageQueueEntry represents a pending message delivery for a user.
+type MessageQueueEntry struct {
+	Base
+
+	ID        int64     `json:"id"`
+	UserID    string    `json:"userId"`
+	MessageID string    `json:"messageId"`
+	QueuedAt  time.Time `json:"queuedAt"`
+}

internal/models/model.go

@@ -0,0 +1,65 @@
+// Package models defines the data models used by the chat application.
+// All model structs embed Base, which provides database access for
+// relation-fetching methods directly on model instances.
+package models
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+)
+
+// DB is the interface that models use to query the database.
+// This avoids a circular import with the db package.
+type DB interface {
+	GetDB() *sql.DB
+}
+
+// UserLookup provides user lookup by ID without circular imports.
+type UserLookup interface {
+	GetUserByID(ctx context.Context, id string) (*User, error)
+}
+
+// ChannelLookup provides channel lookup by ID without circular imports.
+type ChannelLookup interface {
+	GetChannelByID(ctx context.Context, id string) (*Channel, error)
+}
+
+// Sentinel errors for model lookup methods.
+var (
+	ErrUserLookupNotAvailable    = errors.New("user lookup not available")
+	ErrChannelLookupNotAvailable = errors.New("channel lookup not available")
+)
+
+// Base is embedded in all model structs to provide database access.
+type Base struct {
+	db DB
+}
+
+// SetDB injects the database reference into a model.
+func (b *Base) SetDB(d DB) {
+	b.db = d
+}
+
+// GetDB returns the database interface for use in model methods.
+func (b *Base) GetDB() *sql.DB {
+	return b.db.GetDB()
+}
+
+// GetUserLookup returns the DB as a UserLookup if it implements the interface.
+func (b *Base) GetUserLookup() UserLookup { //nolint:ireturn,nolintlint // returns interface by design
+	if ul, ok := b.db.(UserLookup); ok {
+		return ul
+	}
+
+	return nil
+}
+
+// GetChannelLookup returns the DB as a ChannelLookup if it implements the interface.
+func (b *Base) GetChannelLookup() ChannelLookup { //nolint:ireturn,nolintlint // returns interface by design
+	if cl, ok := b.db.(ChannelLookup); ok {
+		return cl
+	}
+
+	return nil
+}

internal/models/server_link.go

@@ -0,0 +1,18 @@
+package models
+
+import (
+	"time"
+)
+
+// ServerLink represents a federation peer server configuration.
+type ServerLink struct {
+	Base
+
+	ID            string     `json:"id"`
+	Name          string     `json:"name"`
+	URL           string     `json:"url"`
+	SharedKeyHash string     `json:"-"`
+	IsActive      bool       `json:"isActive"`
+	CreatedAt     time.Time  `json:"createdAt"`
+	LastSeenAt    *time.Time `json:"lastSeenAt,omitempty"`
+}

internal/models/session.go

@@ -0,0 +1,26 @@
+package models
+
+import (
+	"context"
+	"time"
+)
+
+// Session represents a server-held user session.
+type Session struct {
+	Base
+
+	ID           string     `json:"id"`
+	UserID       string     `json:"userId"`
+	CreatedAt    time.Time  `json:"createdAt"`
+	LastActiveAt time.Time  `json:"lastActiveAt"`
+	ExpiresAt    *time.Time `json:"expiresAt,omitempty"`
+}
+
+// User returns the user who owns this session.
+func (s *Session) User(ctx context.Context) (*User, error) {
+	if ul := s.GetUserLookup(); ul != nil {
+		return ul.GetUserByID(ctx, s.UserID)
+	}
+
+	return nil, ErrUserLookupNotAvailable
+}

internal/models/user.go

@@ -0,0 +1,92 @@
+package models
+
+import (
+	"context"
+	"time"
+)
+
+// User represents a registered user account.
+type User struct {
+	Base
+
+	ID           string     `json:"id"`
+	Nick         string     `json:"nick"`
+	PasswordHash string     `json:"-"`
+	CreatedAt    time.Time  `json:"createdAt"`
+	UpdatedAt    time.Time  `json:"updatedAt"`
+	LastSeenAt   *time.Time `json:"lastSeenAt,omitempty"`
+}
+
+// Channels returns all channels the user is a member of.
+func (u *User) Channels(ctx context.Context) ([]*Channel, error) {
+	rows, err := u.GetDB().QueryContext(ctx, `
+		SELECT c.id, c.name, c.topic, c.modes, c.created_at, c.updated_at
+		FROM channels c
+		JOIN channel_members cm ON cm.channel_id = c.id
+		WHERE cm.user_id = ?
+		ORDER BY c.name`,
+		u.ID,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() { _ = rows.Close() }()
+
+	channels := []*Channel{}
+
+	for rows.Next() {
+		c := &Channel{}
+		c.SetDB(u.db)
+
+		err = rows.Scan(
+			&c.ID, &c.Name, &c.Topic, &c.Modes,
+			&c.CreatedAt, &c.UpdatedAt,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		channels = append(channels, c)
+	}
+
+	return channels, rows.Err()
+}
+
+// QueuedMessages returns undelivered messages for this user.
+func (u *User) QueuedMessages(ctx context.Context) ([]*Message, error) {
+	rows, err := u.GetDB().QueryContext(ctx, `
+		SELECT m.id, m.ts, m.from_user_id, m.from_nick,
+		       m.target, m.type, m.body, m.meta, m.created_at
+		FROM messages m
+		JOIN message_queue mq ON mq.message_id = m.id
+		WHERE mq.user_id = ?
+		ORDER BY mq.queued_at ASC`,
+		u.ID,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	defer func() { _ = rows.Close() }()
+
+	messages := []*Message{}
+
+	for rows.Next() {
+		msg := &Message{}
+		msg.SetDB(u.db)
+
+		err = rows.Scan(
+			&msg.ID, &msg.Timestamp, &msg.FromUserID,
+			&msg.FromNick, &msg.Target, &msg.Type,
+			&msg.Body, &msg.Meta, &msg.CreatedAt,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		messages = append(messages, msg)
+	}
+
+	return messages, rows.Err()
+}

internal/server/http.go

@@ -4,6 +4,6 @@ import "time"
 
 const (
 	httpReadTimeout  = 10 * time.Second
-	httpWriteTimeout = 60 * time.Second
+	httpWriteTimeout = 10 * time.Second
 	maxHeaderBytes   = 1 << 20
 )

internal/server/routes.go

@@ -16,7 +16,7 @@ import (
 
 const routeTimeout = 60 * time.Second
 
-// SetupRoutes configures the HTTP routes and middleware.
+// SetupRoutes configures the HTTP routes and middleware chain.
 func (s *Server) SetupRoutes() {
 	s.router = chi.NewRouter()
 
@@ -39,19 +39,13 @@ func (s *Server) SetupRoutes() {
 	}
 
 	// Health check
-	s.router.Get(
+	s.router.Get("/.well-known/healthcheck.json", s.h.HandleHealthCheck())
-		"/.well-known/healthcheck.json",
-		s.h.HandleHealthCheck(),
-	)
 
 	// Protected metrics endpoint
 	if viper.GetString("METRICS_USERNAME") != "" {
 		s.router.Group(func(r chi.Router) {
 			r.Use(s.mw.MetricsAuth())
-			r.Get("/metrics",
+			r.Get("/metrics", http.HandlerFunc(promhttp.Handler().ServeHTTP))
-				http.HandlerFunc(
-					promhttp.Handler().ServeHTTP,
-				))
 		})
 	}
 
@@ -59,66 +53,55 @@ func (s *Server) SetupRoutes() {
 	s.router.Route("/api/v1", func(r chi.Router) {
 		r.Get("/server", s.h.HandleServerInfo())
 		r.Post("/session", s.h.HandleCreateSession())
+
+		// Unified state and message endpoints
 		r.Get("/state", s.h.HandleState())
 		r.Get("/messages", s.h.HandleGetMessages())
 		r.Post("/messages", s.h.HandleSendCommand())
 		r.Get("/history", s.h.HandleGetHistory())
+
+		// Channels
 		r.Get("/channels", s.h.HandleListAllChannels())
-		r.Get(
+		r.Get("/channels/{channel}/members", s.h.HandleChannelMembers())
-			"/channels/{channel}/members",
-			s.h.HandleChannelMembers(),
-		)
 	})
 
 	// Serve embedded SPA
-	s.setupSPA()
-}
-
-func (s *Server) setupSPA() {
 	distFS, err := fs.Sub(web.Dist, "dist")
 	if err != nil {
-		s.log.Error(
+		s.log.Error("failed to get web dist filesystem", "error", err)
-			"failed to get web dist filesystem",
+	} else {
-			"error", err,
+		fileServer := http.FileServer(http.FS(distFS))
-		)
+
+		s.router.Get("/*", func(w http.ResponseWriter, r *http.Request) {
+			s.serveSPA(distFS, fileServer, w, r)
+		})
+	}
+}
+
+func (s *Server) serveSPA(
+	distFS fs.FS,
+	fileServer http.Handler,
+	w http.ResponseWriter,
+	r *http.Request,
+) {
+	readFS, ok := distFS.(fs.ReadFileFS)
+	if !ok {
+		http.Error(w, "filesystem error", http.StatusInternalServerError)
 
 		return
 	}
 
-	fileServer := http.FileServer(http.FS(distFS))
+	// Try to serve the file; fall back to index.html for SPA routing.
+	f, err := readFS.ReadFile(r.URL.Path[1:])
+	if err != nil || len(f) == 0 {
+		indexHTML, _ := readFS.ReadFile("index.html")
 
-	s.router.Get("/*", func(
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
-		w http.ResponseWriter,
+		w.WriteHeader(http.StatusOK)
-		r *http.Request,
+		_, _ = w.Write(indexHTML)
-	) {
-		readFS, ok := distFS.(fs.ReadFileFS)
-		if !ok {
-			fileServer.ServeHTTP(w, r)
 
-			return
+		return
-		}
+	}
 
-		f, readErr := readFS.ReadFile(r.URL.Path[1:])
+	fileServer.ServeHTTP(w, r)
-		if readErr != nil || len(f) == 0 {
-			indexHTML, indexErr := readFS.ReadFile(
-				"index.html",
-			)
-			if indexErr != nil {
-				http.NotFound(w, r)
-
-				return
-			}
-
-			w.Header().Set(
-				"Content-Type",
-				"text/html; charset=utf-8",
-			)
-			w.WriteHeader(http.StatusOK)
-			_, _ = w.Write(indexHTML)
-
-			return
-		}
-
-		fileServer.ServeHTTP(w, r)
-	})
 }

internal/server/server.go

@@ -148,9 +148,7 @@ func (s *Server) cleanupForExit() {
 func (s *Server) cleanShutdown() {
 	s.exitCode = 0
 
-	ctxShutdown, shutdownCancel := context.WithTimeout(
+	ctxShutdown, shutdownCancel := context.WithTimeout(context.Background(), shutdownTimeout)
-		context.Background(), shutdownTimeout,
-	)
 
 	err := s.httpServer.Shutdown(ctxShutdown)
 	if err != nil {