5af1cd2722
- Fix .golangci.yml for v2 format (linters-settings -> linters.settings) - All production code now passes golangci-lint with zero issues - Line length 88, funlen 80/50, cyclop 15, dupl 100 - Extract shared helpers in db (scanChannels, scanInt64s, scanMessages) - Split runMigrations into applyMigration/execMigration - Fix fanOut return signature (remove unused int64) - Add fanOutSilent helper to avoid dogsled - Rewrite CLI code for lint compliance (nlreturn, wsl_v5, noctx, etc) - Rename CLI api package to chatapi to avoid revive var-naming - Fix all noinlineerr, mnd, perfsprint, funcorder issues - Fix db tests: extract helpers, add t.Parallel, proper error checks - Broker tests already clean - Handler integration tests still have lint issues (next commit)
624 lines
12 KiB
Go
624 lines
12 KiB
Go
package db
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import (
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"context"
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"crypto/rand"
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"database/sql"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"time"
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"github.com/google/uuid"
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)
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const (
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tokenBytes = 32
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defaultPollLimit = 100
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defaultHistLimit = 50
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)
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func generateToken() string {
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b := make([]byte, tokenBytes)
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_, _ = rand.Read(b)
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return hex.EncodeToString(b)
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}
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// IRCMessage is the IRC envelope for all messages.
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type IRCMessage struct {
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ID string `json:"id"`
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Command string `json:"command"`
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From string `json:"from,omitempty"`
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To string `json:"to,omitempty"`
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Body json.RawMessage `json:"body,omitempty"`
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TS string `json:"ts"`
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Meta json.RawMessage `json:"meta,omitempty"`
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DBID int64 `json:"-"`
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}
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// ChannelInfo is a lightweight channel representation.
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type ChannelInfo struct {
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ID int64 `json:"id"`
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Name string `json:"name"`
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Topic string `json:"topic"`
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}
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// MemberInfo represents a channel member.
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type MemberInfo struct {
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ID int64 `json:"id"`
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Nick string `json:"nick"`
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LastSeen time.Time `json:"lastSeen"`
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}
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// CreateUser registers a new user with the given nick.
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func (s *Database) CreateUser(
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ctx context.Context,
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nick string,
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) (int64, string, error) {
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token := generateToken()
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now := time.Now()
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res, err := s.db.ExecContext(ctx,
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`INSERT INTO users
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(nick, token, created_at, last_seen)
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VALUES (?, ?, ?, ?)`,
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nick, token, now, now)
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if err != nil {
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return 0, "", fmt.Errorf("create user: %w", err)
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}
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id, _ := res.LastInsertId()
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return id, token, nil
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}
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// GetUserByToken returns user id and nick for a token.
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func (s *Database) GetUserByToken(
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ctx context.Context,
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token string,
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) (int64, string, error) {
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var id int64
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var nick string
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err := s.db.QueryRowContext(
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ctx,
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"SELECT id, nick FROM users WHERE token = ?",
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token,
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).Scan(&id, &nick)
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if err != nil {
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return 0, "", err
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}
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_, _ = s.db.ExecContext(
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ctx,
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"UPDATE users SET last_seen = ? WHERE id = ?",
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time.Now(), id,
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)
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return id, nick, nil
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}
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// GetUserByNick returns user id for a given nick.
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func (s *Database) GetUserByNick(
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ctx context.Context,
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nick string,
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) (int64, error) {
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var id int64
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err := s.db.QueryRowContext(
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ctx,
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"SELECT id FROM users WHERE nick = ?",
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nick,
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).Scan(&id)
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return id, err
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}
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// GetChannelByName returns the channel ID for a name.
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func (s *Database) GetChannelByName(
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ctx context.Context,
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name string,
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) (int64, error) {
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var id int64
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err := s.db.QueryRowContext(
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ctx,
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"SELECT id FROM channels WHERE name = ?",
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name,
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).Scan(&id)
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return id, err
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}
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// GetOrCreateChannel returns channel id, creating if needed.
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func (s *Database) GetOrCreateChannel(
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ctx context.Context,
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name string,
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) (int64, error) {
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var id int64
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err := s.db.QueryRowContext(
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ctx,
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"SELECT id FROM channels WHERE name = ?",
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name,
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).Scan(&id)
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if err == nil {
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return id, nil
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}
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now := time.Now()
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res, err := s.db.ExecContext(ctx,
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`INSERT INTO channels
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(name, created_at, updated_at)
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VALUES (?, ?, ?)`,
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name, now, now)
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if err != nil {
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return 0, fmt.Errorf("create channel: %w", err)
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}
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id, _ = res.LastInsertId()
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return id, nil
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}
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// JoinChannel adds a user to a channel.
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func (s *Database) JoinChannel(
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ctx context.Context,
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channelID, userID int64,
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) error {
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_, err := s.db.ExecContext(ctx,
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`INSERT OR IGNORE INTO channel_members
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(channel_id, user_id, joined_at)
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VALUES (?, ?, ?)`,
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channelID, userID, time.Now())
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return err
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}
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// PartChannel removes a user from a channel.
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func (s *Database) PartChannel(
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ctx context.Context,
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channelID, userID int64,
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) error {
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_, err := s.db.ExecContext(ctx,
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`DELETE FROM channel_members
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WHERE channel_id = ? AND user_id = ?`,
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channelID, userID)
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return err
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}
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// DeleteChannelIfEmpty removes a channel with no members.
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func (s *Database) DeleteChannelIfEmpty(
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ctx context.Context,
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channelID int64,
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) error {
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_, err := s.db.ExecContext(ctx,
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`DELETE FROM channels WHERE id = ?
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AND NOT EXISTS
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(SELECT 1 FROM channel_members
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WHERE channel_id = ?)`,
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channelID, channelID)
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return err
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}
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// scanChannels scans rows into a ChannelInfo slice.
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func scanChannels(
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rows *sql.Rows,
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) ([]ChannelInfo, error) {
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defer func() { _ = rows.Close() }()
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var out []ChannelInfo
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for rows.Next() {
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var ch ChannelInfo
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err := rows.Scan(&ch.ID, &ch.Name, &ch.Topic)
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if err != nil {
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return nil, err
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}
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out = append(out, ch)
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}
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err := rows.Err()
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if err != nil {
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return nil, err
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}
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if out == nil {
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out = []ChannelInfo{}
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}
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return out, nil
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}
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// ListChannels returns channels the user has joined.
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func (s *Database) ListChannels(
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ctx context.Context,
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userID int64,
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) ([]ChannelInfo, error) {
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rows, err := s.db.QueryContext(ctx,
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`SELECT c.id, c.name, c.topic
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FROM channels c
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INNER JOIN channel_members cm
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ON cm.channel_id = c.id
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WHERE cm.user_id = ?
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ORDER BY c.name`, userID)
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if err != nil {
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return nil, err
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}
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return scanChannels(rows)
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}
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// ListAllChannels returns every channel.
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func (s *Database) ListAllChannels(
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ctx context.Context,
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) ([]ChannelInfo, error) {
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rows, err := s.db.QueryContext(ctx,
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`SELECT id, name, topic
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FROM channels ORDER BY name`)
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if err != nil {
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return nil, err
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}
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return scanChannels(rows)
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}
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// ChannelMembers returns all members of a channel.
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func (s *Database) ChannelMembers(
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ctx context.Context,
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channelID int64,
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) ([]MemberInfo, error) {
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rows, err := s.db.QueryContext(ctx,
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`SELECT u.id, u.nick, u.last_seen
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FROM users u
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INNER JOIN channel_members cm
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ON cm.user_id = u.id
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WHERE cm.channel_id = ?
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ORDER BY u.nick`, channelID)
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if err != nil {
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return nil, err
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}
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defer func() { _ = rows.Close() }()
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var members []MemberInfo
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for rows.Next() {
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var m MemberInfo
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err = rows.Scan(&m.ID, &m.Nick, &m.LastSeen)
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if err != nil {
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return nil, err
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}
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members = append(members, m)
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}
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err = rows.Err()
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if err != nil {
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return nil, err
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}
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if members == nil {
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members = []MemberInfo{}
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}
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return members, nil
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}
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// scanInt64s scans rows into an int64 slice.
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func scanInt64s(rows *sql.Rows) ([]int64, error) {
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defer func() { _ = rows.Close() }()
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var ids []int64
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for rows.Next() {
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var id int64
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err := rows.Scan(&id)
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if err != nil {
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return nil, err
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}
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ids = append(ids, id)
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}
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err := rows.Err()
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if err != nil {
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return nil, err
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}
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return ids, nil
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}
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// GetChannelMemberIDs returns user IDs in a channel.
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func (s *Database) GetChannelMemberIDs(
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ctx context.Context,
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channelID int64,
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) ([]int64, error) {
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rows, err := s.db.QueryContext(ctx,
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`SELECT user_id FROM channel_members
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WHERE channel_id = ?`, channelID)
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if err != nil {
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return nil, err
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}
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return scanInt64s(rows)
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}
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// GetUserChannelIDs returns channel IDs the user is in.
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func (s *Database) GetUserChannelIDs(
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ctx context.Context,
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userID int64,
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) ([]int64, error) {
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rows, err := s.db.QueryContext(ctx,
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`SELECT channel_id FROM channel_members
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WHERE user_id = ?`, userID)
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if err != nil {
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return nil, err
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}
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return scanInt64s(rows)
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}
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// InsertMessage stores a message and returns its DB ID.
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func (s *Database) InsertMessage(
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ctx context.Context,
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command, from, to string,
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body json.RawMessage,
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meta json.RawMessage,
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) (int64, string, error) {
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msgUUID := uuid.New().String()
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now := time.Now().UTC()
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if body == nil {
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body = json.RawMessage("[]")
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}
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if meta == nil {
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meta = json.RawMessage("{}")
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}
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res, err := s.db.ExecContext(ctx,
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`INSERT INTO messages
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(uuid, command, msg_from, msg_to,
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body, meta, created_at)
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VALUES (?, ?, ?, ?, ?, ?, ?)`,
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msgUUID, command, from, to,
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string(body), string(meta), now)
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if err != nil {
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return 0, "", err
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}
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id, _ := res.LastInsertId()
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return id, msgUUID, nil
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}
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// EnqueueMessage adds a message to a user's queue.
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func (s *Database) EnqueueMessage(
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ctx context.Context,
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userID, messageID int64,
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) error {
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_, err := s.db.ExecContext(ctx,
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`INSERT OR IGNORE INTO client_queues
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(user_id, message_id, created_at)
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VALUES (?, ?, ?)`,
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userID, messageID, time.Now())
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return err
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}
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// PollMessages returns queued messages for a user.
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func (s *Database) PollMessages(
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ctx context.Context,
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userID, afterQueueID int64,
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limit int,
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) ([]IRCMessage, int64, error) {
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if limit <= 0 {
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limit = defaultPollLimit
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}
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rows, err := s.db.QueryContext(ctx,
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`SELECT cq.id, m.uuid, m.command,
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m.msg_from, m.msg_to,
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m.body, m.meta, m.created_at
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FROM client_queues cq
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INNER JOIN messages m
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ON m.id = cq.message_id
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WHERE cq.user_id = ? AND cq.id > ?
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ORDER BY cq.id ASC LIMIT ?`,
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userID, afterQueueID, limit)
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if err != nil {
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return nil, afterQueueID, err
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}
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msgs, lastQID, scanErr := scanMessages(
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rows, afterQueueID,
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)
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if scanErr != nil {
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return nil, afterQueueID, scanErr
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}
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return msgs, lastQID, nil
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}
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// GetHistory returns message history for a target.
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func (s *Database) GetHistory(
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ctx context.Context,
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target string,
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beforeID int64,
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limit int,
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) ([]IRCMessage, error) {
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if limit <= 0 {
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limit = defaultHistLimit
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}
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rows, err := s.queryHistory(
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ctx, target, beforeID, limit,
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)
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if err != nil {
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return nil, err
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}
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msgs, _, scanErr := scanMessages(rows, 0)
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if scanErr != nil {
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return nil, scanErr
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}
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if msgs == nil {
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msgs = []IRCMessage{}
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}
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reverseMessages(msgs)
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return msgs, nil
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}
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func (s *Database) queryHistory(
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ctx context.Context,
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target string,
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beforeID int64,
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limit int,
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) (*sql.Rows, error) {
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if beforeID > 0 {
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return s.db.QueryContext(ctx,
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`SELECT id, uuid, command, msg_from,
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msg_to, body, meta, created_at
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FROM messages
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WHERE msg_to = ? AND id < ?
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AND command = 'PRIVMSG'
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ORDER BY id DESC LIMIT ?`,
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target, beforeID, limit)
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}
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return s.db.QueryContext(ctx,
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`SELECT id, uuid, command, msg_from,
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msg_to, body, meta, created_at
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FROM messages
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WHERE msg_to = ?
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AND command = 'PRIVMSG'
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ORDER BY id DESC LIMIT ?`,
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target, limit)
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}
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|
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func scanMessages(
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rows *sql.Rows,
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fallbackQID int64,
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) ([]IRCMessage, int64, error) {
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defer func() { _ = rows.Close() }()
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var msgs []IRCMessage
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lastQID := fallbackQID
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|
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for rows.Next() {
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var (
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m IRCMessage
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qID int64
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body, meta string
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ts time.Time
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)
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|
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err := rows.Scan(
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&qID, &m.ID, &m.Command,
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&m.From, &m.To,
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&body, &meta, &ts,
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)
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if err != nil {
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return nil, fallbackQID, err
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}
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m.Body = json.RawMessage(body)
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m.Meta = json.RawMessage(meta)
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m.TS = ts.Format(time.RFC3339Nano)
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m.DBID = qID
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lastQID = qID
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msgs = append(msgs, m)
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}
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|
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err := rows.Err()
|
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if err != nil {
|
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return nil, fallbackQID, err
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}
|
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|
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if msgs == nil {
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msgs = []IRCMessage{}
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}
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return msgs, lastQID, nil
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}
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|
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func reverseMessages(msgs []IRCMessage) {
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for i, j := 0, len(msgs)-1; i < j; i, j = i+1, j-1 {
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msgs[i], msgs[j] = msgs[j], msgs[i]
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}
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}
|
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|
|
// ChangeNick updates a user's nickname.
|
|
func (s *Database) ChangeNick(
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ctx context.Context,
|
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userID int64,
|
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newNick string,
|
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) error {
|
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_, err := s.db.ExecContext(ctx,
|
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"UPDATE users SET nick = ? WHERE id = ?",
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newNick, userID)
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return err
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}
|
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|
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// SetTopic sets the topic for a channel.
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func (s *Database) SetTopic(
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ctx context.Context,
|
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channelName, topic string,
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) error {
|
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_, err := s.db.ExecContext(ctx,
|
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`UPDATE channels SET topic = ?,
|
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updated_at = ? WHERE name = ?`,
|
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topic, time.Now(), channelName)
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|
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return err
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}
|
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|
|
// DeleteUser removes a user and all their data.
|
|
func (s *Database) DeleteUser(
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ctx context.Context,
|
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userID int64,
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) error {
|
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_, err := s.db.ExecContext(
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ctx,
|
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"DELETE FROM users WHERE id = ?",
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userID,
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)
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return err
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}
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|
|
// GetAllChannelMembershipsForUser returns channels
|
|
// a user belongs to.
|
|
func (s *Database) GetAllChannelMembershipsForUser(
|
|
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 = ?`, userID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return scanChannels(rows)
|
|
}
|