d0656b069d
- 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)
66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
// Package broker provides an in-memory pub/sub for long-poll notifications.
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package broker
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import (
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"sync"
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)
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// Broker notifies waiting clients when new messages are available.
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type Broker struct {
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mu sync.Mutex
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listeners map[int64][]chan struct{} // userID -> list of waiting channels
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}
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// New creates a new Broker.
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func New() *Broker {
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return &Broker{
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listeners: make(map[int64][]chan struct{}),
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}
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}
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// Wait returns a channel that will be closed when a message is available for the user.
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func (b *Broker) Wait(userID int64) chan struct{} {
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ch := make(chan struct{}, 1)
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b.mu.Lock()
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b.listeners[userID] = append(b.listeners[userID], ch)
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b.mu.Unlock()
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return ch
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}
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// Notify wakes up all waiting clients for a user.
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func (b *Broker) Notify(userID int64) {
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b.mu.Lock()
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waiters := b.listeners[userID]
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delete(b.listeners, userID)
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b.mu.Unlock()
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for _, ch := range waiters {
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select {
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case ch <- struct{}{}:
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default:
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}
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}
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}
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// Remove removes a specific wait channel (for cleanup on timeout).
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func (b *Broker) Remove(userID int64, ch chan struct{}) {
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b.mu.Lock()
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defer b.mu.Unlock()
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waiters := b.listeners[userID]
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for i, w := range waiters {
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if w == ch {
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b.listeners[userID] = append(waiters[:i], waiters[i+1:]...)
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break
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}
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}
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if len(b.listeners[userID]) == 0 {
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delete(b.listeners, userID)
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}
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}
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