[MM-60603] Don't follow threads when marking them as read on focus (#28263)

* [MM-60603] Don't follow threads when marking them as read on focus

* Fix tests

* Fix lint

* Fix the original bug in the API call

server/channels/api4/user.go

@@ -3344,6 +3344,14 @@ func setUnreadThreadByPostId(c *Context, w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	// We want to make sure the thread is followed when marking as unread
+	// https://mattermost.atlassian.net/browse/MM-36430
+	err := c.App.UpdateThreadFollowForUser(c.Params.UserId, c.Params.TeamId, c.Params.ThreadId, true)
+	if err != nil {
+		c.Err = err
+		return
+	}
+
 	thread, err := c.App.UpdateThreadReadForUserByPost(c.AppContext, c.AppContext.Session().Id, c.Params.UserId, c.Params.TeamId, c.Params.ThreadId, c.Params.PostId)
 	if err != nil {
 		c.Err = err

server/channels/api4/user_test.go

@@ -6855,29 +6855,6 @@ func TestThreadSocketEvents(t *testing.T) {
 		require.Truef(t, caught, "User should have received %s event", model.WebsocketEventThreadUpdated)
 	})
 
-	resp, err = th.Client.UpdateThreadFollowForUser(context.Background(), th.BasicUser.Id, th.BasicTeam.Id, rpost.Id, false)
-	require.NoError(t, err)
-	CheckOKStatus(t, resp)
-
-	t.Run("Listed for follow event", func(t *testing.T) {
-		var caught bool
-		func() {
-			for {
-				select {
-				case ev := <-userWSClient.EventChannel:
-					if ev.EventType() == model.WebsocketEventThreadFollowChanged {
-						caught = true
-						require.Equal(t, ev.GetData()["state"], false)
-						require.Equal(t, ev.GetData()["reply_count"], float64(1))
-					}
-				case <-time.After(2 * time.Second):
-					return
-				}
-			}
-		}()
-		require.Truef(t, caught, "User should have received %s event", model.WebsocketEventThreadFollowChanged)
-	})
-
 	_, resp, err = th.Client.UpdateThreadReadForUser(context.Background(), th.BasicUser.Id, th.BasicTeam.Id, rpost.Id, replyPost.CreateAt+1)
 	require.NoError(t, err)
 	CheckOKStatus(t, resp)
@@ -6907,6 +6884,31 @@ func TestThreadSocketEvents(t *testing.T) {
 		require.Truef(t, caught, "User should have received %s event", model.WebsocketEventThreadReadChanged)
 	})
 
+	resp, err = th.Client.UpdateThreadFollowForUser(context.Background(), th.BasicUser.Id, th.BasicTeam.Id, rpost.Id, false)
+	require.NoError(t, err)
+	CheckOKStatus(t, resp)
+
+	t.Run("Listed for follow event", func(t *testing.T) {
+		var caught bool
+		func() {
+			for {
+				select {
+				case ev := <-userWSClient.EventChannel:
+					if ev.EventType() == model.WebsocketEventThreadFollowChanged {
+						caught = true
+						require.Equal(t, ev.GetData()["state"], false)
+						require.Equal(t, ev.GetData()["reply_count"], float64(1))
+					}
+				case <-time.After(2 * time.Second):
+					return
+				}
+			}
+		}()
+		require.Truef(t, caught, "User should have received %s event", model.WebsocketEventThreadFollowChanged)
+	})
+
+	_, err = th.Client.UpdateThreadFollowForUser(context.Background(), th.BasicUser.Id, th.BasicTeam.Id, rpost.Id, true)
+	require.NoError(t, err)
 	_, resp, err = th.Client.SetThreadUnreadByPostId(context.Background(), th.BasicUser.Id, th.BasicTeam.Id, rpost.Id, rpost.Id)
 	require.NoError(t, err)
 	CheckOKStatus(t, resp)

server/channels/app/user.go

@@ -2831,13 +2831,10 @@ func (a *App) UpdateThreadReadForUser(c request.CTX, currentSessionId, userID, t
 		return nil, err
 	}
 
-	opts := store.ThreadMembershipOpts{
-		Following:       true,
-		UpdateFollowing: true,
-	}
-	membership, storeErr := a.Srv().Store().Thread().MaintainMembership(userID, threadID, opts)
-	if storeErr != nil {
-		return nil, model.NewAppError("UpdateThreadReadForUser", "app.user.update_thread_read_for_user.app_error", nil, "", http.StatusInternalServerError).Wrap(storeErr)
+	// If the thread doesn't have a membership, we shouldn't try to mark it as unread
+	membership, err := a.GetThreadMembershipForUser(userID, threadID)
+	if err != nil {
+		return nil, err
 	}
 
 	previousUnreadMentions := membership.UnreadMentions

server/channels/app/user_test.go

@@ -8,7 +8,6 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
-	"net/http"
 	"path/filepath"
 	"strings"
 	"testing"
@@ -1930,7 +1929,7 @@ func TestPatchUser(t *testing.T) {
 }
 
 func TestUpdateThreadReadForUser(t *testing.T) {
-	t.Run("Ensure thread membership is created and followed", func(t *testing.T) {
+	t.Run("Ensure thread membership exists before updating read", func(t *testing.T) {
 		th := Setup(t).InitBasic()
 		defer th.TearDown()
 		th.App.UpdateConfig(func(cfg *model.Config) {
@@ -1947,48 +1946,13 @@ func TestUpdateThreadReadForUser(t *testing.T) {
 		require.Zero(t, threads.Total)
 
 		_, appErr = th.App.UpdateThreadReadForUser(th.Context, "currentSessionId", th.BasicUser.Id, th.BasicChannel.TeamId, rootPost.Id, replyPost.CreateAt)
-		require.Nil(t, appErr)
-
-		threads, appErr = th.App.GetThreadsForUser(th.BasicUser.Id, th.BasicTeam.Id, model.GetUserThreadsOpts{})
-		require.Nil(t, appErr)
-		assert.NotZero(t, threads.Total)
-
-		threadMembership, appErr := th.App.GetThreadMembershipForUser(th.BasicUser.Id, rootPost.Id)
-		require.Nil(t, appErr)
-		require.NotNil(t, threadMembership)
-		assert.True(t, threadMembership.Following)
-
-		_, appErr = th.App.GetThreadMembershipForUser(th.BasicUser.Id, "notfound")
 		require.NotNil(t, appErr)
-		assert.Equal(t, http.StatusNotFound, appErr.StatusCode)
-	})
 
-	t.Run("Ensure no panic on error", func(t *testing.T) {
-		th := SetupWithStoreMock(t)
-		defer th.TearDown()
-
-		mockStore := th.App.Srv().Store().(*storemocks.Store)
-		mockUserStore := storemocks.UserStore{}
-		mockUserStore.On("Count", mock.Anything).Return(int64(10), nil)
-		mockUserStore.On("Get", mock.Anything, "user1").Return(&model.User{Id: "user1"}, nil)
-
-		mockThreadStore := storemocks.ThreadStore{}
-		mockThreadStore.On("MaintainMembership", "user1", "postid", mock.Anything).Return(nil, errors.New("error"))
-
-		var err error
-		th.App.ch.srv.userService, err = users.New(users.ServiceConfig{
-			UserStore:    &mockUserStore,
-			SessionStore: &storemocks.SessionStore{},
-			OAuthStore:   &storemocks.OAuthStore{},
-			ConfigFn:     th.App.ch.srv.platform.Config,
-			LicenseFn:    th.App.ch.srv.License,
-		})
+		_, err := th.App.Srv().Store().Thread().MaintainMembership(th.BasicUser.Id, rootPost.Id, store.ThreadMembershipOpts{Following: true, UpdateFollowing: true})
 		require.NoError(t, err)
-		mockStore.On("User").Return(&mockUserStore)
-		mockStore.On("Thread").Return(&mockThreadStore)
 
-		_, err = th.App.UpdateThreadReadForUser(th.Context, "currentSessionId", "user1", "team1", "postid", 100)
-		require.Error(t, err)
+		_, appErr = th.App.UpdateThreadReadForUser(th.Context, "currentSessionId", th.BasicUser.Id, th.BasicChannel.TeamId, rootPost.Id, replyPost.CreateAt)
+		require.Nil(t, appErr)
 	})
 }
 

webapp/channels/src/actions/views/threads.ts

@@ -5,6 +5,7 @@ import {batchActions} from 'redux-batched-actions';
 
 import {updateThreadRead} from 'mattermost-redux/actions/threads';
 import {getCurrentTeamId} from 'mattermost-redux/selectors/entities/teams';
+import {getThread} from 'mattermost-redux/selectors/entities/threads';
 import {getCurrentUserId} from 'mattermost-redux/selectors/entities/users';
 import type {ThunkActionFunc} from 'mattermost-redux/types/actions';
 
@@ -56,8 +57,9 @@ export function markThreadAsRead(threadId: string): ThunkActionFunc<void, Global
         const state = getState();
         const currentUserId = getCurrentUserId(state);
         const currentTeamId = getCurrentTeamId(state);
+        const thread = getThread(state, threadId);
 
-        if (isThreadOpen(state, threadId) && window.isActive && !isThreadManuallyUnread(state, threadId)) {
+        if (thread && isThreadOpen(state, threadId) && window.isActive && !isThreadManuallyUnread(state, threadId)) {
             // mark thread as read on the server
             dispatch(updateThreadRead(currentUserId, currentTeamId, threadId, Date.now()));
         }