125 lines
3.4 KiB
Go
125 lines
3.4 KiB
Go
// Copyright (c) 2014-2019, b3log.org & hacpai.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package notification includes notification related manipulations.
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package notification
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import (
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"net/http"
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"os"
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"strconv"
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"time"
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"github.com/b3log/wide/conf"
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"github.com/b3log/wide/event"
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"github.com/b3log/wide/i18n"
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"github.com/b3log/wide/log"
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"github.com/b3log/wide/session"
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"github.com/b3log/wide/util"
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"github.com/gorilla/websocket"
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)
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const (
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error = "ERROR" // notification.severity: ERROR
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warn = "WARN" // notification.severity: WARN
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info = "INFO" // notification.severity: INFO
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setup = "Setup" // notification.type: setup
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server = "Server" // notification.type: server
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)
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// Logger.
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var logger = log.NewLogger(os.Stdout)
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// Notification represents a notification.
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type Notification struct {
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event *event.Event
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Type string `json:"type"`
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Severity string `json:"severity"`
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Message string `json:"message"`
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}
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// event2Notification processes user event by converting the specified event to a notification, and then push it to front
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// browser with notification channel.
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func event2Notification(e *event.Event) {
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if nil == session.NotificationWS[e.Sid] {
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return
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}
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wsChannel := session.NotificationWS[e.Sid]
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if nil == wsChannel {
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return
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}
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httpSession, _ := session.HTTPSession.Get(wsChannel.Request, session.CookieName)
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uid := httpSession.Values["uid"].(string)
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locale := conf.GetUser(uid).Locale
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var notification *Notification
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switch e.Code {
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case event.EvtCodeGocodeNotFound:
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fallthrough
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case event.EvtCodeIDEStubNotFound:
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notification = &Notification{event: e, Type: setup, Severity: error,
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Message: i18n.Get(locale, "notification_"+strconv.Itoa(e.Code)).(string)}
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case event.EvtCodeServerInternalError:
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notification = &Notification{event: e, Type: server, Severity: error,
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Message: i18n.Get(locale, "notification_"+strconv.Itoa(e.Code)).(string) + " [" + e.Data.(string) + "]"}
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default:
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logger.Warnf("Can't handle event[code=%d]", e.Code)
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return
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}
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wsChannel.WriteJSON(notification)
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wsChannel.Refresh()
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}
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// WSHandler handles request of creating notification channel.
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func WSHandler(w http.ResponseWriter, r *http.Request) {
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sid := r.URL.Query()["sid"][0]
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wSession := session.WideSessions.Get(sid)
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if nil == wSession {
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return
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}
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conn, _ := websocket.Upgrade(w, r, nil, 1024, 1024)
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wsChan := util.WSChannel{Sid: sid, Conn: conn, Request: r, Time: time.Now()}
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ret := map[string]interface{}{"notification": "Notification initialized", "cmd": "init-notification"}
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err := wsChan.WriteJSON(&ret)
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if nil != err {
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return
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}
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session.NotificationWS[sid] = &wsChan
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logger.Tracef("Open a new [Notification] with session [%s], %d", sid, len(session.NotificationWS))
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// add user event handler
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wSession.EventQueue.AddHandler(event.HandleFunc(event2Notification))
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input := map[string]interface{}{}
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for {
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if err := wsChan.ReadJSON(&input); err != nil {
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return
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}
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}
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}
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