Browse Source

Add EventSource support (#11235)

If the browser supports EventSource switch to use this instead of
polling notifications.

Signed-off-by: Andrew Thornton art27@cantab.net
mj
zeripath 2 years ago
committed by GitHub
parent
commit
791353c03b
No known key found for this signature in database GPG Key ID: 4AEE18F83AFDEB23
  1. 5
      custom/conf/app.ini.sample
  2. 3
      docs/content/doc/advanced/config-cheat-sheet.en-us.md
  3. 78
      integrations/eventsource_test.go
  4. 15
      models/notification.go
  5. 119
      modules/eventsource/event.go
  6. 54
      modules/eventsource/event_test.go
  7. 84
      modules/eventsource/manager.go
  8. 50
      modules/eventsource/manager_run.go
  9. 78
      modules/eventsource/messenger.go
  10. 21
      modules/setting/setting.go
  11. 7
      modules/templates/helper.go
  12. 112
      routers/events/events.go
  13. 2
      routers/init.go
  14. 3
      routers/routes/routes.go
  15. 12
      routers/user/auth.go
  16. 1
      templates/base/head.tmpl
  17. 59
      web_src/js/features/notification.js

5
custom/conf/app.ini.sample

@ -202,12 +202,15 @@ DESCRIPTION = Gitea (Git with a cup of tea) is a painless self-hosted Git servic
KEYWORDS = go,git,self-hosted,gitea
[ui.notification]
; Control how often notification is queried to update the notification
; Control how often the notification endpoint is polled to update the notification
; The timeout will increase to MAX_TIMEOUT in TIMEOUT_STEPs if the notification count is unchanged
; Set MIN_TIMEOUT to 0 to turn off
MIN_TIMEOUT = 10s
MAX_TIMEOUT = 60s
TIMEOUT_STEP = 10s
; This setting determines how often the db is queried to get the latest notification counts.
; If the browser client supports EventSource, it will be used in preference to polling notification.
EVENT_SOURCE_UPDATE_TIME = 10s
[markdown]
; Render soft line breaks as hard line breaks, which means a single newline character between

3
docs/content/doc/advanced/config-cheat-sheet.en-us.md

@ -144,9 +144,10 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
### UI - Notification (`ui.notification`)
- `MIN_TIMEOUT`: **10s**: These options control how often notification is queried to update the notification count. On page load the notification count will be checked after `MIN_TIMEOUT`. The timeout will increase to `MAX_TIMEOUT` by `TIMEOUT_STEP` if the notification count is unchanged. Set MIN_TIMEOUT to 0 to turn off.
- `MIN_TIMEOUT`: **10s**: These options control how often notification endpoint is polled to update the notification count. On page load the notification count will be checked after `MIN_TIMEOUT`. The timeout will increase to `MAX_TIMEOUT` by `TIMEOUT_STEP` if the notification count is unchanged. Set MIN_TIMEOUT to 0 to turn off.
- `MAX_TIMEOUT`: **60s**.
- `TIMEOUT_STEP`: **10s**.
- `EVENT_SOURCE_UPDATE_TIME`: **10s**: This setting determines how often the database is queried to update notification counts. If the browser client supports `EventSource`, it will be used in preference to polling notification endpoint.
## Markdown (`markdown`)

78
integrations/eventsource_test.go

@ -0,0 +1,78 @@
// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package integrations
import (
"fmt"
"net/http"
"testing"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/eventsource"
api "code.gitea.io/gitea/modules/structs"
"github.com/stretchr/testify/assert"
)
func TestEventSourceManagerRun(t *testing.T) {
defer prepareTestEnv(t)()
manager := eventsource.GetManager()
eventChan := manager.Register(2)
defer func() {
manager.Unregister(2, eventChan)
// ensure the eventChan is closed
for {
_, ok := <-eventChan
if !ok {
break
}
}
}()
expectNotificationCountEvent := func(count int64) func() bool {
return func() bool {
select {
case event, ok := <-eventChan:
if !ok {
return false
}
data, ok := event.Data.(models.UserIDCount)
if !ok {
return false
}
return event.Name == "notification-count" && data.Count == count
default:
return false
}
}
}
user2 := models.AssertExistsAndLoadBean(t, &models.User{ID: 2}).(*models.User)
repo1 := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 1}).(*models.Repository)
thread5 := models.AssertExistsAndLoadBean(t, &models.Notification{ID: 5}).(*models.Notification)
assert.NoError(t, thread5.LoadAttributes())
session := loginUser(t, user2.Name)
token := getTokenForLoggedInUser(t, session)
var apiNL []api.NotificationThread
// -- mark notifications as read --
req := NewRequest(t, "GET", fmt.Sprintf("/api/v1/notifications?token=%s", token))
resp := session.MakeRequest(t, req, http.StatusOK)
DecodeJSON(t, resp, &apiNL)
assert.Len(t, apiNL, 2)
lastReadAt := "2000-01-01T00%3A50%3A01%2B00%3A00" //946687801 <- only Notification 4 is in this filter ...
req = NewRequest(t, "PUT", fmt.Sprintf("/api/v1/repos/%s/%s/notifications?last_read_at=%s&token=%s", user2.Name, repo1.Name, lastReadAt, token))
resp = session.MakeRequest(t, req, http.StatusResetContent)
req = NewRequest(t, "GET", fmt.Sprintf("/api/v1/notifications?token=%s", token))
resp = session.MakeRequest(t, req, http.StatusOK)
DecodeJSON(t, resp, &apiNL)
assert.Len(t, apiNL, 1)
assert.Eventually(t, expectNotificationCountEvent(1), 30*time.Second, 1*time.Second)
}

15
models/notification.go

@ -718,6 +718,21 @@ func getNotificationCount(e Engine, user *User, status NotificationStatus) (coun
return
}
// UserIDCount is a simple coalition of UserID and Count
type UserIDCount struct {
UserID int64
Count int64
}
// GetUIDsAndNotificationCounts between the two provided times
func GetUIDsAndNotificationCounts(since, until timeutil.TimeStamp) ([]UserIDCount, error) {
sql := `SELECT user_id, count(*) AS count FROM notification ` +
`WHERE user_id IN (SELECT user_id FROM notification WHERE updated_unix >= ? AND ` +
`updated_unix < ?) AND status = ? GROUP BY user_id`
var res []UserIDCount
return res, x.SQL(sql, since, until, NotificationStatusUnread).Find(&res)
}
func setNotificationStatusReadIfUnread(e Engine, userID, issueID int64) error {
notification, err := getIssueNotification(e, userID, issueID)
// ignore if not exists

119
modules/eventsource/event.go

@ -0,0 +1,119 @@
// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package eventsource
import (
"bytes"
"encoding/json"
"fmt"
"io"
"strings"
"time"
)
func wrapNewlines(w io.Writer, prefix []byte, value []byte) (sum int64, err error) {
if len(value) == 0 {
return
}
n := 0
last := 0
for j := bytes.IndexByte(value, '\n'); j > -1; j = bytes.IndexByte(value[last:], '\n') {
n, err = w.Write(prefix)
sum += int64(n)
if err != nil {
return
}
n, err = w.Write(value[last : last+j+1])
sum += int64(n)
if err != nil {
return
}
last += j + 1
}
n, err = w.Write(prefix)
sum += int64(n)
if err != nil {
return
}
n, err = w.Write(value[last:])
sum += int64(n)
if err != nil {
return
}
n, err = w.Write([]byte("\n"))
sum += int64(n)
return
}
// Event is an eventsource event, not all fields need to be set
type Event struct {
// Name represents the value of the event: tag in the stream
Name string
// Data is either JSONified []byte or interface{} that can be JSONd
Data interface{}
// ID represents the ID of an event
ID string
// Retry tells the receiver only to attempt to reconnect to the source after this time
Retry time.Duration
}
// WriteTo writes data to w until there's no more data to write or when an error occurs.
// The return value n is the number of bytes written. Any error encountered during the write is also returned.
func (e *Event) WriteTo(w io.Writer) (int64, error) {
sum := int64(0)
nint := 0
n, err := wrapNewlines(w, []byte("event: "), []byte(e.Name))
sum += n
if err != nil {
return sum, err
}
if e.Data != nil {
var data []byte
switch v := e.Data.(type) {
case []byte:
data = v
case string:
data = []byte(v)
default:
var err error
data, err = json.Marshal(e.Data)
if err != nil {
return sum, err
}
}
n, err := wrapNewlines(w, []byte("data: "), data)
sum += n
if err != nil {
return sum, err
}
}
n, err = wrapNewlines(w, []byte("id: "), []byte(e.ID))
sum += n
if err != nil {
return sum, err
}
if e.Retry != 0 {
nint, err = fmt.Fprintf(w, "retry: %d\n", int64(e.Retry/time.Millisecond))
sum += int64(nint)
if err != nil {
return sum, err
}
}
nint, err = w.Write([]byte("\n"))
sum += int64(nint)
return sum, err
}
func (e *Event) String() string {
buf := new(strings.Builder)
_, _ = e.WriteTo(buf)
return buf.String()
}

54
modules/eventsource/event_test.go

@ -0,0 +1,54 @@
// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package eventsource
import (
"bytes"
"testing"
)
func Test_wrapNewlines(t *testing.T) {
tests := []struct {
name string
prefix string
value string
output string
}{
{
"check no new lines",
"prefix: ",
"value",
"prefix: value\n",
},
{
"check simple newline",
"prefix: ",
"value1\nvalue2",
"prefix: value1\nprefix: value2\n",
},
{
"check pathological newlines",
"p: ",
"\n1\n\n2\n3\n",
"p: \np: 1\np: \np: 2\np: 3\np: \n",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
w := &bytes.Buffer{}
gotSum, err := wrapNewlines(w, []byte(tt.prefix), []byte(tt.value))
if err != nil {
t.Errorf("wrapNewlines() error = %v", err)
return
}
if gotSum != int64(len(tt.output)) {
t.Errorf("wrapNewlines() = %v, want %v", gotSum, int64(len(tt.output)))
}
if gotW := w.String(); gotW != tt.output {
t.Errorf("wrapNewlines() = %v, want %v", gotW, tt.output)
}
})
}
}

84
modules/eventsource/manager.go

@ -0,0 +1,84 @@
// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package eventsource
import (
"sync"
)
// Manager manages the eventsource Messengers
type Manager struct {
mutex sync.Mutex
messengers map[int64]*Messenger
}
var manager *Manager
func init() {
manager = &Manager{
messengers: make(map[int64]*Messenger),
}
}
// GetManager returns a Manager and initializes one as singleton if there's none yet
func GetManager() *Manager {
return manager
}
// Register message channel
func (m *Manager) Register(uid int64) <-chan *Event {
m.mutex.Lock()
messenger, ok := m.messengers[uid]
if !ok {
messenger = NewMessenger(uid)
m.messengers[uid] = messenger
}
m.mutex.Unlock()
return messenger.Register()
}
// Unregister message channel
func (m *Manager) Unregister(uid int64, channel <-chan *Event) {
m.mutex.Lock()
defer m.mutex.Unlock()
messenger, ok := m.messengers[uid]
if !ok {
return
}
if messenger.Unregister(channel) {
delete(m.messengers, uid)
}
}
// UnregisterAll message channels
func (m *Manager) UnregisterAll() {
m.mutex.Lock()
defer m.mutex.Unlock()
for _, messenger := range m.messengers {
messenger.UnregisterAll()
}
m.messengers = map[int64]*Messenger{}
}
// SendMessage sends a message to a particular user
func (m *Manager) SendMessage(uid int64, message *Event) {
m.mutex.Lock()
messenger, ok := m.messengers[uid]
m.mutex.Unlock()
if ok {
messenger.SendMessage(message)
}
}
// SendMessageBlocking sends a message to a particular user
func (m *Manager) SendMessageBlocking(uid int64, message *Event) {
m.mutex.Lock()
messenger, ok := m.messengers[uid]
m.mutex.Unlock()
if ok {
messenger.SendMessageBlocking(message)
}
}

50
modules/eventsource/manager_run.go

@ -0,0 +1,50 @@
// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package eventsource
import (
"context"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/timeutil"
)
// Init starts this eventsource
func (m *Manager) Init() {
go graceful.GetManager().RunWithShutdownContext(m.Run)
}
// Run runs the manager within a provided context
func (m *Manager) Run(ctx context.Context) {
then := timeutil.TimeStampNow().Add(-2)
timer := time.NewTicker(setting.UI.Notification.EventSourceUpdateTime)
loop:
for {
select {
case <-ctx.Done():
timer.Stop()
break loop
case <-timer.C:
now := timeutil.TimeStampNow().Add(-2)
uidCounts, err := models.GetUIDsAndNotificationCounts(then, now)
if err != nil {
log.Error("Unable to get UIDcounts: %v", err)
}
for _, uidCount := range uidCounts {
m.SendMessage(uidCount.UserID, &Event{
Name: "notification-count",
Data: uidCount,
})
}
then = now
}
}
m.UnregisterAll()
}

78
modules/eventsource/messenger.go

@ -0,0 +1,78 @@
// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package eventsource
import "sync"
// Messenger is a per uid message store
type Messenger struct {
mutex sync.Mutex
uid int64
channels []chan *Event
}
// NewMessenger creates a messenger for a particular uid
func NewMessenger(uid int64) *Messenger {
return &Messenger{
uid: uid,
channels: [](chan *Event){},
}
}
// Register returns a new chan []byte
func (m *Messenger) Register() <-chan *Event {
m.mutex.Lock()
// TODO: Limit the number of messengers per uid
channel := make(chan *Event, 1)
m.channels = append(m.channels, channel)
m.mutex.Unlock()
return channel
}
// Unregister removes the provider chan []byte
func (m *Messenger) Unregister(channel <-chan *Event) bool {
m.mutex.Lock()
defer m.mutex.Unlock()
for i, toRemove := range m.channels {
if channel == toRemove {
m.channels = append(m.channels[:i], m.channels[i+1:]...)
close(toRemove)
break
}
}
return len(m.channels) == 0
}
// UnregisterAll removes all chan []byte
func (m *Messenger) UnregisterAll() {
m.mutex.Lock()
defer m.mutex.Unlock()
for _, channel := range m.channels {
close(channel)
}
m.channels = nil
}
// SendMessage sends the message to all registered channels
func (m *Messenger) SendMessage(message *Event) {
m.mutex.Lock()
defer m.mutex.Unlock()
for i := range m.channels {
channel := m.channels[i]
select {
case channel <- message:
default:
}
}
}
// SendMessageBlocking sends the message to all registered channels and ensures it gets sent
func (m *Messenger) SendMessageBlocking(message *Event) {
m.mutex.Lock()
defer m.mutex.Unlock()
for i := range m.channels {
m.channels[i] <- message
}
}

21
modules/setting/setting.go

@ -182,9 +182,10 @@ var (
UseServiceWorker bool
Notification struct {
MinTimeout time.Duration
TimeoutStep time.Duration
MaxTimeout time.Duration
MinTimeout time.Duration
TimeoutStep time.Duration
MaxTimeout time.Duration
EventSourceUpdateTime time.Duration
} `ini:"ui.notification"`
Admin struct {
@ -216,13 +217,15 @@ var (
Themes: []string{`gitea`, `arc-green`},
Reactions: []string{`+1`, `-1`, `laugh`, `hooray`, `confused`, `heart`, `rocket`, `eyes`},
Notification: struct {
MinTimeout time.Duration
TimeoutStep time.Duration
MaxTimeout time.Duration
MinTimeout time.Duration
TimeoutStep time.Duration
MaxTimeout time.Duration
EventSourceUpdateTime time.Duration
}{
MinTimeout: 10 * time.Second,
TimeoutStep: 10 * time.Second,
MaxTimeout: 60 * time.Second,
MinTimeout: 10 * time.Second,
TimeoutStep: 10 * time.Second,
MaxTimeout: 60 * time.Second,
EventSourceUpdateTime: 10 * time.Second,
},
Admin: struct {
UserPagingNum int

7
modules/templates/helper.go

@ -284,9 +284,10 @@ func NewFuncMap() []template.FuncMap {
},
"NotificationSettings": func() map[string]int {
return map[string]int{
"MinTimeout": int(setting.UI.Notification.MinTimeout / time.Millisecond),
"TimeoutStep": int(setting.UI.Notification.TimeoutStep / time.Millisecond),
"MaxTimeout": int(setting.UI.Notification.MaxTimeout / time.Millisecond),
"MinTimeout": int(setting.UI.Notification.MinTimeout / time.Millisecond),
"TimeoutStep": int(setting.UI.Notification.TimeoutStep / time.Millisecond),
"MaxTimeout": int(setting.UI.Notification.MaxTimeout / time.Millisecond),
"EventSourceUpdateTime": int(setting.UI.Notification.EventSourceUpdateTime / time.Millisecond),
}
},
"contain": func(s []int64, id int64) bool {

112
routers/events/events.go

@ -0,0 +1,112 @@
// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package events
import (
"net/http"
"time"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/eventsource"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/routers/user"
)
// Events listens for events
func Events(ctx *context.Context) {
// FIXME: Need to check if resp is actually a http.Flusher! - how though?
// Set the headers related to event streaming.
ctx.Resp.Header().Set("Content-Type", "text/event-stream")
ctx.Resp.Header().Set("Cache-Control", "no-cache")
ctx.Resp.Header().Set("Connection", "keep-alive")
ctx.Resp.Header().Set("X-Accel-Buffering", "no")
ctx.Resp.WriteHeader(http.StatusOK)
// Listen to connection close and un-register messageChan
notify := ctx.Req.Context().Done()
ctx.Resp.Flush()
shutdownCtx := graceful.GetManager().ShutdownContext()
uid := ctx.User.ID
messageChan := eventsource.GetManager().Register(uid)
unregister := func() {
eventsource.GetManager().Unregister(uid, messageChan)
// ensure the messageChan is closed
for {
_, ok := <-messageChan
if !ok {
break
}
}
}
if _, err := ctx.Resp.Write([]byte("\n")); err != nil {
log.Error("Unable to write to EventStream: %v", err)
unregister()
return
}
timer := time.NewTicker(30 * time.Second)
loop:
for {
select {
case <-timer.C:
event := &eventsource.Event{
Name: "ping",
}
_, err := event.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 <-notify:
go unregister()
break loop
case <-shutdownCtx.Done():
go unregister()
break loop
case event, ok := <-messageChan:
if !ok {
break loop
}
// Handle logout
if event.Name == "logout" {
if ctx.Session.ID() == event.Data {
_, _ = (&eventsource.Event{
Name: "logout",
Data: "here",
}).WriteTo(ctx.Resp)
ctx.Resp.Flush()
go unregister()
user.HandleSignOut(ctx)
break loop
}
// Replace the event - we don't want to expose the session ID to the user
event = (&eventsource.Event{
Name: "logout",
Data: "elsewhere",
})
}
_, err := event.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()
}
}
timer.Stop()
}

2
routers/init.go

@ -15,6 +15,7 @@ import (
"code.gitea.io/gitea/modules/auth/sso"
"code.gitea.io/gitea/modules/cache"
"code.gitea.io/gitea/modules/cron"
"code.gitea.io/gitea/modules/eventsource"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/highlight"
code_indexer "code.gitea.io/gitea/modules/indexer/code"
@ -123,6 +124,7 @@ func GlobalInit(ctx context.Context) {
if err := task.Init(); err != nil {
log.Fatal("Failed to initialize task scheduler: %v", err)
}
eventsource.GetManager().Init()
}
if setting.EnableSQLite3 {
log.Info("SQLite3 Supported")

3
routers/routes/routes.go

@ -27,6 +27,7 @@ import (
"code.gitea.io/gitea/routers/admin"
apiv1 "code.gitea.io/gitea/routers/api/v1"
"code.gitea.io/gitea/routers/dev"
"code.gitea.io/gitea/routers/events"
"code.gitea.io/gitea/routers/org"
"code.gitea.io/gitea/routers/private"
"code.gitea.io/gitea/routers/repo"
@ -340,6 +341,8 @@ func RegisterRoutes(m *macaron.Macaron) {
})
}, reqSignOut)
m.Any("/user/events", reqSignIn, events.Events)
m.Group("/login/oauth", func() {
m.Get("/authorize", bindIgnErr(auth.AuthorizationForm{}), user.AuthorizeOAuth)
m.Post("/grant", bindIgnErr(auth.GrantApplicationForm{}), user.GrantApplicationOAuth)

12
routers/user/auth.go

@ -16,6 +16,7 @@ import (
"code.gitea.io/gitea/modules/auth/oauth2"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/eventsource"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/password"
"code.gitea.io/gitea/modules/recaptcha"
@ -991,7 +992,8 @@ func LinkAccountPostRegister(ctx *context.Context, cpt *captcha.Captcha, form au
ctx.Redirect(setting.AppSubURL + "/user/login")
}
func handleSignOut(ctx *context.Context) {
// HandleSignOut resets the session and sets the cookies
func HandleSignOut(ctx *context.Context) {
_ = ctx.Session.Delete("uid")
_ = ctx.Session.Delete("uname")
_ = ctx.Session.Delete("socialId")
@ -1006,7 +1008,13 @@ func handleSignOut(ctx *context.Context) {
// SignOut sign out from login status
func SignOut(ctx *context.Context) {
handleSignOut(ctx)
if ctx.User != nil {
eventsource.GetManager().SendMessageBlocking(ctx.User.ID, &eventsource.Event{
Name: "logout",
Data: ctx.Session.ID(),
})
}
HandleSignOut(ctx)
ctx.Redirect(setting.AppSubURL + "/")
}

1
templates/base/head.tmpl

@ -98,6 +98,7 @@
MinTimeout: {{NotificationSettings.MinTimeout}},
TimeoutStep: {{NotificationSettings.TimeoutStep}},
MaxTimeout: {{NotificationSettings.MaxTimeout}},
EventSourceUpdateTime: {{NotificationSettings.EventSourceUpdateTime}},
},
{{if .RequireTribute}}
tributeValues: [

59
web_src/js/features/notification.js

@ -19,21 +19,53 @@ export function initNotificationsTable() {
}
export function initNotificationCount() {
if (NotificationSettings.MinTimeout <= 0) {
const notificationCount = $('.notification_count');
if (!notificationCount.length) {
return;
}
const notificationCount = $('.notification_count');
if (notificationCount.length > 0) {
const fn = (timeout, lastCount) => {
setTimeout(async () => {
await updateNotificationCountWithCallback(fn, timeout, lastCount);
}, timeout);
};
if (NotificationSettings.EventSourceUpdateTime > 0 && !!window.EventSource) {
// Try to connect to the event source first
const source = new EventSource(`${AppSubUrl}/user/events`);
source.addEventListener('notification-count', async (e) => {
try {
const data = JSON.parse(e.data);
const notificationCount = $('.notification_count');
if (data.Count === 0) {
notificationCount.addClass('hidden');
} else {
notificationCount.removeClass('hidden');
}
notificationCount.text(`${data.Count}`);
await updateNotificationTable();
} catch (error) {
console.error(error);
}
});
source.addEventListener('logout', async (e) => {
if (e.data !== 'here') {
return;
}
source.close();
window.location.href = AppSubUrl;
});
return;
}
fn(NotificationSettings.MinTimeout, notificationCount.text());
if (NotificationSettings.MinTimeout <= 0) {
return;
}
const fn = (timeout, lastCount) => {
setTimeout(async () => {
await updateNotificationCountWithCallback(fn, timeout, lastCount);
}, timeout);
};
fn(NotificationSettings.MinTimeout, notificationCount.text());
}
async function updateNotificationCountWithCallback(callback, timeout, lastCount) {
@ -54,9 +86,14 @@ async function updateNotificationCountWithCallback(callback, timeout, lastCount)
}
callback(timeout, newCount);
if (needsUpdate) {
await updateNotificationTable();
}
}
async function updateNotificationTable() {
const notificationDiv = $('#notification_div');
if (notificationDiv.length > 0 && needsUpdate) {
if (notificationDiv.length > 0) {
const data = await $.ajax({
type: 'GET',
url: `${AppSubUrl}/notifications?${notificationDiv.data('params')}`,

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