Move the stopwatches to the eventsource stream (#14588)

Move the stopwatches to the eventsource stream

Use the /user/events eventsource to update the stopwatches
instead of polling /api/v1/user/stopwatches if the eventsource
is enabled.

Signed-off-by: Andrew Thornton <art27@cantab.net>

routers/events/events.go

@@ -5,13 +5,17 @@
 package events
 
 import (
+	"encoding/json"
 	"net/http"
 	"time"
 
+	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/convert"
 	"code.gitea.io/gitea/modules/eventsource"
 	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/routers/user"
 )
 
@@ -55,6 +59,8 @@ func Events(ctx *context.Context) {
 
 	timer := time.NewTicker(30 * time.Second)
 
+	stopwatchTimer := time.NewTicker(setting.UI.Notification.MinTimeout)
+
 loop:
 	for {
 		select {
@@ -75,6 +81,32 @@ loop:
 		case <-shutdownCtx.Done():
 			go unregister()
 			break loop
+		case <-stopwatchTimer.C:
+			sws, err := models.GetUserStopwatches(ctx.User.ID, models.ListOptions{})
+			if err != nil {
+				log.Error("Unable to GetUserStopwatches: %v", err)
+				continue
+			}
+			apiSWs, err := convert.ToStopWatches(sws)
+			if err != nil {
+				log.Error("Unable to APIFormat stopwatches: %v", err)
+				continue
+			}
+			dataBs, err := json.Marshal(apiSWs)
+			if err != nil {
+				log.Error("Unable to marshal stopwatches: %v", err)
+				continue
+			}
+			_, err = (&eventsource.Event{
+				Name: "stopwatches",
+				Data: string(dataBs),
+			}).WriteTo(ctx.Resp)
+			if err != nil {
+				log.Error("Unable to write to EventStream for user %s: %v", ctx.User.Name, err)
+				go unregister()
+				break loop
+			}
+			ctx.Resp.Flush()
 		case event, ok := <-messageChan:
 			if !ok {
 				break loop