PLT-4430 improve slow channel switching (#4331)

* PLT-4430 improve slow channel switching

* Update client side unit tests

* Convert getChannelsUnread to getMyChannelMembers and address other feedback

* Pull channel members on websocket reconnect

api/channel_test.go

@@ -35,7 +35,7 @@ func TestCreateChannel(t *testing.T) {
 
 	rget := Client.Must(Client.GetChannels("")).Data.(*model.ChannelList)
 	nameMatch := false
-	for _, c := range rget.Channels {
+	for _, c := range *rget {
 		if c.Name == channel.Name {
 			nameMatch = true
 		}
@@ -240,8 +240,8 @@ func TestUpdateChannel(t *testing.T) {
 	}
 
 	rget := Client.Must(Client.GetChannels(""))
-	data := rget.Data.(*model.ChannelList)
-	for _, c := range data.Channels {
+	channels := rget.Data.(*model.ChannelList)
+	for _, c := range *channels {
 		if c.Name == model.DEFAULT_CHANNEL {
 			c.Header = "new header"
 			c.Name = "pseudo-square"
@@ -654,13 +654,13 @@ func TestGetChannel(t *testing.T) {
 	channel2 = Client.Must(Client.CreateChannel(channel2)).Data.(*model.Channel)
 
 	rget := Client.Must(Client.GetChannels(""))
-	data := rget.Data.(*model.ChannelList)
+	channels := rget.Data.(*model.ChannelList)
 
-	if data.Channels[0].DisplayName != channel1.DisplayName {
+	if (*channels)[0].DisplayName != channel1.DisplayName {
 		t.Fatal("full name didn't match")
 	}
 
-	if data.Channels[1].DisplayName != channel2.DisplayName {
+	if (*channels)[1].DisplayName != channel2.DisplayName {
 		t.Fatal("full name didn't match")
 	}
 
@@ -717,13 +717,13 @@ func TestGetMoreChannel(t *testing.T) {
 	th.LoginBasic2()
 
 	rget := Client.Must(Client.GetMoreChannels(""))
-	data := rget.Data.(*model.ChannelList)
+	channels := rget.Data.(*model.ChannelList)
 
-	if data.Channels[0].DisplayName != channel1.DisplayName {
+	if (*channels)[0].DisplayName != channel1.DisplayName {
 		t.Fatal("full name didn't match")
 	}
 
-	if data.Channels[1].DisplayName != channel2.DisplayName {
+	if (*channels)[1].DisplayName != channel2.DisplayName {
 		t.Fatal("full name didn't match")
 	}
 
@@ -770,6 +770,30 @@ func TestGetChannelCounts(t *testing.T) {
 
 }
 
+func TestGetMyChannelMembers(t *testing.T) {
+	th := Setup().InitBasic()
+	Client := th.BasicClient
+	team := th.BasicTeam
+
+	channel1 := &model.Channel{DisplayName: "A Test API Name", Name: "a" + model.NewId() + "a", Type: model.CHANNEL_OPEN, TeamId: team.Id}
+	channel1 = Client.Must(Client.CreateChannel(channel1)).Data.(*model.Channel)
+
+	channel2 := &model.Channel{DisplayName: "B Test API Name", Name: "a" + model.NewId() + "a", Type: model.CHANNEL_OPEN, TeamId: team.Id}
+	channel2 = Client.Must(Client.CreateChannel(channel2)).Data.(*model.Channel)
+
+	if result, err := Client.GetMyChannelMembers(); err != nil {
+		t.Fatal(err)
+	} else {
+		members := result.Data.(*model.ChannelMembers)
+
+		// town-square, off-topic, basic test channel, channel1, channel2
+		if len(*members) != 5 {
+			t.Fatal("wrong number of members", len(*members))
+		}
+	}
+
+}
+
 func TestJoinChannelById(t *testing.T) {
 	th := Setup().InitBasic()
 	Client := th.BasicClient
@@ -905,7 +929,7 @@ func TestLeaveChannel(t *testing.T) {
 
 	rget := Client.Must(Client.GetChannels(""))
 	cdata := rget.Data.(*model.ChannelList)
-	for _, c := range cdata.Channels {
+	for _, c := range *cdata {
 		if c.Name == model.DEFAULT_CHANNEL {
 			if _, err := Client.LeaveChannel(c.Id); err == nil {
 				t.Fatal("should have errored on leaving default channel")
@@ -969,7 +993,7 @@ func TestDeleteChannel(t *testing.T) {
 
 	rget := Client.Must(Client.GetChannels(""))
 	cdata := rget.Data.(*model.ChannelList)
-	for _, c := range cdata.Channels {
+	for _, c := range *cdata {
 		if c.Name == model.DEFAULT_CHANNEL {
 			if _, err := Client.DeleteChannel(c.Id); err == nil {
 				t.Fatal("should have errored on deleting default channel")
@@ -1249,7 +1273,7 @@ func TestUpdateNotifyProps(t *testing.T) {
 	data["user_id"] = user.Id
 	data["desktop"] = model.CHANNEL_NOTIFY_MENTION
 
-	timeBeforeUpdate := model.GetMillis()
+	//timeBeforeUpdate := model.GetMillis()
 	time.Sleep(100 * time.Millisecond)
 
 	// test updating desktop
@@ -1261,14 +1285,6 @@ func TestUpdateNotifyProps(t *testing.T) {
 		t.Fatalf("NotifyProps[\"mark_unread\"] changed to %v", notifyProps["mark_unread"])
 	}
 
-	rget := Client.Must(Client.GetChannels(""))
-	rdata := rget.Data.(*model.ChannelList)
-	if len(rdata.Members) == 0 || rdata.Members[channel1.Id].NotifyProps["desktop"] != data["desktop"] {
-		t.Fatal("NotifyProps[\"desktop\"] did not update properly")
-	} else if rdata.Members[channel1.Id].LastUpdateAt <= timeBeforeUpdate {
-		t.Fatal("LastUpdateAt did not update")
-	}
-
 	// test an empty update
 	delete(data, "desktop")