MM-22706: pass along set_online flag in websocket response (#14591)

* MM-22706: pass along set_online flag in websocket response

To let the client know whether a user has created a post without
being online or not, we get the set_online query param and
pass it down to the websocket event being passed down to the client.

With this PR, the "data" field of the `posted` event will contain
a `set_online` boolean field set to true/false depending on the
query_param set_online value set in the createPost call.

* Setting to false for auto responder

Co-authored-by: mattermod <mattermod@users.noreply.github.com>

app/file_test.go

@@ -249,13 +249,13 @@ func TestMigrateFilenamesToFileInfos(t *testing.T) {
 	fpath := fmt.Sprintf("/teams/%v/channels/%v/users/%v/%v/test.png", th.BasicTeam.Id, th.BasicChannel.Id, th.BasicUser.Id, fileId)
 	_, err := th.App.WriteFile(file, fpath)
 	require.Nil(t, err)
-	rpost, err := th.App.CreatePost(&model.Post{UserId: th.BasicUser.Id, ChannelId: th.BasicChannel.Id, Filenames: []string{fmt.Sprintf("/%v/%v/%v/test.png", th.BasicChannel.Id, th.BasicUser.Id, fileId)}}, th.BasicChannel, false)
+	rpost, err := th.App.CreatePost(&model.Post{UserId: th.BasicUser.Id, ChannelId: th.BasicChannel.Id, Filenames: []string{fmt.Sprintf("/%v/%v/%v/test.png", th.BasicChannel.Id, th.BasicUser.Id, fileId)}}, th.BasicChannel, false, true)
 	require.Nil(t, err)
 
 	infos = th.App.MigrateFilenamesToFileInfos(rpost)
 	assert.Equal(t, 1, len(infos))
 
-	rpost, err = th.App.CreatePost(&model.Post{UserId: th.BasicUser.Id, ChannelId: th.BasicChannel.Id, Filenames: []string{fmt.Sprintf("/%v/%v/%v/../../test.png", th.BasicChannel.Id, th.BasicUser.Id, fileId)}}, th.BasicChannel, false)
+	rpost, err = th.App.CreatePost(&model.Post{UserId: th.BasicUser.Id, ChannelId: th.BasicChannel.Id, Filenames: []string{fmt.Sprintf("/%v/%v/%v/../../test.png", th.BasicChannel.Id, th.BasicUser.Id, fileId)}}, th.BasicChannel, false, true)
 	require.Nil(t, err)
 
 	infos = th.App.MigrateFilenamesToFileInfos(rpost)