PLT-3462 Add the ability to clear push notifications after channel is viewed (#3834)

* Add the ability to clear push notifications after channel is viewed

* Fix race condition between updating the mention count and reading it when sending push notifications

model/push_notification.go

@@ -6,12 +6,16 @@ package model
 import (
 	"encoding/json"
 	"io"
+	"strings"
 )
 
 const (
 	PUSH_NOTIFY_APPLE   = "apple"
 	PUSH_NOTIFY_ANDROID = "android"
 
+	PUSH_TYPE_MESSAGE = "message"
+	PUSH_TYPE_CLEAR   = "clear"
+
 	CATEGORY_DM = "DIRECT_MESSAGE"
 
 	MHPNS = "https://push.mattermost.com"
@@ -28,6 +32,7 @@ type PushNotification struct {
 	ContentAvailable int    `json:"cont_ava"`
 	ChannelId        string `json:"channel_id"`
 	ChannelName      string `json:"channel_name"`
+	Type             string `json:"type"`
 }
 
 func (me *PushNotification) ToJson() string {
@@ -39,6 +44,16 @@ func (me *PushNotification) ToJson() string {
 	}
 }
 
+func (me *PushNotification) SetDeviceIdAndPlatform(deviceId string) {
+	if strings.HasPrefix(deviceId, PUSH_NOTIFY_APPLE+":") {
+		me.Platform = PUSH_NOTIFY_APPLE
+		me.DeviceId = strings.TrimPrefix(deviceId, PUSH_NOTIFY_APPLE+":")
+	} else if strings.HasPrefix(deviceId, PUSH_NOTIFY_ANDROID+":") {
+		me.Platform = PUSH_NOTIFY_ANDROID
+		me.DeviceId = strings.TrimPrefix(deviceId, PUSH_NOTIFY_ANDROID+":")
+	}
+}
+
 func PushNotificationFromJson(data io.Reader) *PushNotification {
 	decoder := json.NewDecoder(data)
 	var me PushNotification

model/session.go

@@ -6,6 +6,7 @@ package model
 import (
 	"encoding/json"
 	"io"
+	"strings"
 )
 
 const (
@@ -109,6 +110,11 @@ func (me *Session) GetTeamByTeamId(teamId string) *TeamMember {
 	return nil
 }
 
+func (me *Session) IsMobileApp() bool {
+	return len(me.DeviceId) > 0 &&
+		(strings.HasPrefix(me.DeviceId, PUSH_NOTIFY_APPLE+":") || strings.HasPrefix(me.DeviceId, PUSH_NOTIFY_ANDROID+":"))
+}
+
 func SessionsToJson(o []*Session) string {
 	if b, err := json.Marshal(o); err != nil {
 		return "[]"