[MM-24177] Adds props to post for front end to know if highlight or not (#14348)

* Add props to post

* Address PR comments

* address PR comments

* Fix styling problems

* Address PR comments

* address PR comments

* Add PR suggestion

* fix usage

* fix error

* remove err

* fix golang lint

app/post.go

@@ -396,6 +396,11 @@ func (a *App) FillInPostProps(post *model.Post, channel *model.Channel) *model.A
 		post.DelProp("channel_mentions")
 	}
 
+	matched := model.AT_MENTION_PATTEN.MatchString(post.Message)
+	if a.License() != nil && *a.License().Features.LDAPGroups && matched && !a.HasPermissionToChannel(post.UserId, post.ChannelId, model.PERMISSION_USE_GROUP_MENTIONS) {
+		post.AddProp(model.POST_PROPS_GROUP_HIGHLIGHT_DISABLED, true)
+	}
+
 	return nil
 }
 

app/post_test.go

@@ -1755,3 +1755,92 @@ func TestCountMentionsFromPost(t *testing.T) {
 		assert.Equal(t, numPosts, count)
 	})
 }
+
+func TestFillInPostProps(t *testing.T) {
+	t.Run("should not add disable group highlight to post props for user with group mention permissions", func(t *testing.T) {
+		th := Setup(t).InitBasic()
+		defer th.TearDown()
+		th.App.SetLicense(model.NewTestLicense("ldap"))
+
+		user1 := th.BasicUser
+
+		channel := th.CreateChannel(th.BasicTeam)
+
+		post1, err := th.App.CreatePost(&model.Post{
+			UserId:    user1.Id,
+			ChannelId: channel.Id,
+			Message:   "test123123 @group1 @group2 blah blah blah",
+		}, channel, false)
+		require.Nil(t, err)
+
+		err = th.App.FillInPostProps(post1, channel)
+
+		assert.Nil(t, err)
+		assert.Equal(t, post1.Props, model.StringInterface{})
+	})
+
+	t.Run("should not add disable group highlight to post props for app without license", func(t *testing.T) {
+		th := Setup(t).InitBasic()
+		defer th.TearDown()
+
+		id := model.NewId()
+		guest := &model.User{
+			Email:         "success+" + id + "@simulator.amazonses.com",
+			Username:      "un_" + id,
+			Nickname:      "nn_" + id,
+			Password:      "Password1",
+			EmailVerified: true,
+		}
+		guest, err := th.App.CreateGuest(guest)
+		require.Nil(t, err)
+		th.LinkUserToTeam(guest, th.BasicTeam)
+
+		channel := th.CreateChannel(th.BasicTeam)
+		th.AddUserToChannel(guest, channel)
+
+		post1, err := th.App.CreatePost(&model.Post{
+			UserId:    guest.Id,
+			ChannelId: channel.Id,
+			Message:   "test123123 @group1 @group2 blah blah blah",
+		}, channel, false)
+		require.Nil(t, err)
+
+		err = th.App.FillInPostProps(post1, channel)
+
+		assert.Nil(t, err)
+		assert.Equal(t, post1.Props, model.StringInterface{})
+	})
+
+	t.Run("should add disable group highlight to post props for guest user", func(t *testing.T) {
+		th := Setup(t).InitBasic()
+		defer th.TearDown()
+		th.App.SetLicense(model.NewTestLicense("ldap"))
+
+		id := model.NewId()
+		guest := &model.User{
+			Email:         "success+" + id + "@simulator.amazonses.com",
+			Username:      "un_" + id,
+			Nickname:      "nn_" + id,
+			Password:      "Password1",
+			EmailVerified: true,
+		}
+		guest, err := th.App.CreateGuest(guest)
+		require.Nil(t, err)
+		th.LinkUserToTeam(guest, th.BasicTeam)
+
+		channel := th.CreateChannel(th.BasicTeam)
+		th.AddUserToChannel(guest, channel)
+
+		post1, err := th.App.CreatePost(&model.Post{
+			UserId:    guest.Id,
+			ChannelId: channel.Id,
+			Message:   "test123123 @group1 @group2 blah blah blah",
+		}, channel, false)
+		require.Nil(t, err)
+
+		err = th.App.FillInPostProps(post1, channel)
+
+		assert.Nil(t, err)
+		assert.Equal(t, post1.Props, model.StringInterface{"disable_group_highlight": true})
+	})
+}

model/post.go

@@ -63,8 +63,11 @@ const (
 	POST_PROPS_OVERRIDE_ICON_EMOJI = "override_icon_emoji"
 
 	POST_PROPS_MENTION_HIGHLIGHT_DISABLED = "mentionHighlightDisabled"
+	POST_PROPS_GROUP_HIGHLIGHT_DISABLED   = "disable_group_highlight"
 )
 
+var AT_MENTION_PATTEN = regexp.MustCompile(`\B@`)
+
 type Post struct {
 	Id         string `json:"id"`
 	CreateAt   int64  `json:"create_at"`