PLT-135 Showing "(Edited)" indicator if a message has been edited. (#4923)

api/post.go

@@ -1217,6 +1217,7 @@ func updatePost(c *Context, w http.ResponseWriter, r *http.Request) {
 	*newPost = *oldPost
 
 	newPost.Message = post.Message
+	newPost.EditAt = model.GetMillis()
 	newPost.Hashtags, _ = model.ParseHashtags(post.Message)
 
 	if result := <-Srv.Store.Post().Update(newPost, oldPost); result.Err != nil {

api/post_test.go

@@ -47,6 +47,10 @@ func TestCreatePost(t *testing.T) {
 		t.Fatal("shouldn't have files")
 	}
 
+	if rpost1.Data.(*model.Post).EditAt != 0 {
+		t.Fatal("Newly craeted post shouldn't have EditAt set")
+	}
+
 	post2 := &model.Post{ChannelId: channel1.Id, Message: "a" + model.NewId() + "a", RootId: rpost1.Data.(*model.Post).Id}
 	rpost2, err := Client.CreatePost(post2)
 	if err != nil {
@@ -326,6 +330,10 @@ func TestUpdatePost(t *testing.T) {
 		t.Fatal(err)
 	}
 
+	if rpost2.Data.(*model.Post).EditAt != 0 {
+		t.Fatal("Newly craeted post shouldn't have EditAt set")
+	}
+
 	msg2 := "a" + model.NewId() + " update post 1"
 	rpost2.Data.(*model.Post).Message = msg2
 	if rupost2, err := Client.UpdatePost(rpost2.Data.(*model.Post)); err != nil {
@@ -334,6 +342,9 @@ func TestUpdatePost(t *testing.T) {
 		if rupost2.Data.(*model.Post).Message != msg2 {
 			t.Fatal("failed to updates")
 		}
+		if rupost2.Data.(*model.Post).EditAt == 0 {
+			t.Fatal("EditAt not updated for post")
+		}
 	}
 
 	msg1 := "#hashtag a" + model.NewId() + " update post 2"