mirror of
https://github.com/go-gitea/gitea.git
synced 2026-10-30 20:24:01 +00:00
silverwind
7308c5fb97
Keep notification counts and stopwatches in sync when tabs open or reconnect, closing the gap behind [this flake](https://github.com/go-gitea/gitea/actions/runs/31312525323/job/93242429394). 1. Send current notification counts and stopwatch state on each WebSocket connection, replacing the separate state fetches tabs made on every connect. 2. Tabs joining an already open connection fetch current state once, since its snapshot went out before they attached. 3. Send events queued during the handshake before the snapshot, so older events can't roll it back. 4. Wait for the Redis SUBSCRIBE acknowledgement, so the snapshot read after subscribing can't miss an event.
72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
// Copyright 2026 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package websocket
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import (
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"bytes"
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"context"
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user_model "gitea.dev/models/user"
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"gitea.dev/modules/json"
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"gitea.dev/modules/setting"
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notify_service "gitea.dev/services/notify"
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"gitea.dev/services/pubsub"
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)
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type wsNotifier struct {
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notify_service.NullNotifier
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}
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var _ notify_service.Notifier = &wsNotifier{}
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func Init() error {
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// the pubsub broker must be ready before the notifier starts publishing to it
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if err := pubsub.Init(); err != nil {
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return err
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}
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notify_service.RegisterNotifier(&wsNotifier{})
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return nil
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}
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func UserData(ctx context.Context, user *user_model.User) (data [][]byte) {
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for _, event := range [][]byte{notificationCountEvent(ctx, user.ID), stopwatchesEvent(ctx, user)} {
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if event != nil {
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data = append(data, event)
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}
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}
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return data
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}
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func EventForSession(brokerPayload []byte, sessionID string) []byte {
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target, eventData, _ := bytes.Cut(brokerPayload, []byte("\n"))
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if len(target) > 0 && string(target) != sessionID {
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return nil
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}
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return eventData
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}
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// makeEventMessage prefixes the client JSON with its target session, empty for all sessions.
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func makeEventMessage(eventType, targetSession string, eventData any) []byte {
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buf := bytes.NewBufferString(targetSession + "\n")
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err := json.MarshalWriteRelaxed(buf, &struct {
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EventType string `json:"eventType"`
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EventData any `json:"eventData,omitzero"`
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}{eventType, eventData})
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if err != nil {
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setting.PanicInDevOrTesting("websocket: marshal event: %v", err)
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return nil
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}
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return buf.Bytes()
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}
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func publishUserEvent(userID int64, build func() []byte) {
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topic := pubsub.UserTopic(userID)
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if !pubsub.DefaultBroker.HasTopicSubscribers(topic) {
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return
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}
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if event := build(); event != nil {
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pubsub.DefaultBroker.Publish(topic, event)
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}
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}
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