eezd
eb63b14c8e
- Store app settings as one JSON document on the server, merged per key and pushed to other devices; cache locally to avoid a flash on load - Settings page groups appearance, account, shortcuts, shares, API tokens and trash; full screen with a section list on phones - Font size and content width settings - Change the login password, signing out other sessions - Settings writes and password changes only accept a login session
67 lines
1.5 KiB
Go
67 lines
1.5 KiB
Go
// Package events 把仓库变更广播给所有在线客户端（WebSocket）。
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package events
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import (
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"encoding/json"
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"log/slog"
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"sync"
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)
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// Event 为推送给客户端的消息
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//
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// tree 目录结构变化（新增/删除/移动），客户端重新拉取目录树
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// changed 笔记内容变化，Rev 为新版本
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// deleted 笔记被删除
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// moved 笔记被移动（From -> Path），内容版本不变
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// settings 应用设置变化，客户端重新读取
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type Event struct {
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Type string `json:"type"`
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Path string `json:"path,omitempty"`
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From string `json:"from,omitempty"`
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Rev string `json:"rev,omitempty"`
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}
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type Hub struct {
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mu sync.Mutex
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clients map[chan []byte]struct{}
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}
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func NewHub() *Hub { return &Hub{clients: map[chan []byte]struct{}{}} }
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// Subscribe 返回消息通道与取消函数；通道在客户端跟不上时会被关闭，客户端应重连并全量同步
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func (h *Hub) Subscribe() (<-chan []byte, func()) {
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ch := make(chan []byte, 64)
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h.mu.Lock()
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h.clients[ch] = struct{}{}
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h.mu.Unlock()
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return ch, func() {
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h.mu.Lock()
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if _, ok := h.clients[ch]; ok {
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delete(h.clients, ch)
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close(ch)
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}
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h.mu.Unlock()
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}
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}
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func (h *Hub) Broadcast(events ...Event) {
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if len(events) == 0 {
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return
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}
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msg, err := json.Marshal(events)
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if err != nil {
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slog.Error("序列化事件失败", "err", err)
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return
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}
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h.mu.Lock()
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defer h.mu.Unlock()
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for ch := range h.clients {
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select {
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case ch <- msg:
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default:
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delete(h.clients, ch)
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close(ch)
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}
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}
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}
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