PLT-3506 Added flagged posts functionality (#3679)

* Added flagged posts functionality

* UI Improvements to flags (#3697)

* Added flag functionality for mobile

* Updating flagged text (#3699)

* Add back button to RHS thread when coming from flagged posts

* Updating position of flags (#3708)

* Plt 3506 - Reverting flag position (#3724)

* Revert "Updating position of flags (#3708)"

This reverts commit aaa05632c5d9eda35a048300a5bd7e99584c5b58.

* Fixing the icon in search

* Help text and white space improvements (#3730)

* Updatng help text and some white spacing.

* Updating help text

store/sql_post_store_test.go

@@ -905,3 +905,67 @@ func TestPostCountsByDay(t *testing.T) {
 		}
 	}
 }
+
+func TestPostStoreGetFlaggedPosts(t *testing.T) {
+	Setup()
+
+	o1 := &model.Post{}
+	o1.ChannelId = model.NewId()
+	o1.UserId = model.NewId()
+	o1.Message = "a" + model.NewId() + "b"
+	o1 = (<-store.Post().Save(o1)).Data.(*model.Post)
+	time.Sleep(2 * time.Millisecond)
+
+	o2 := &model.Post{}
+	o2.ChannelId = o1.ChannelId
+	o2.UserId = model.NewId()
+	o2.Message = "a" + model.NewId() + "b"
+	o2 = (<-store.Post().Save(o2)).Data.(*model.Post)
+	time.Sleep(2 * time.Millisecond)
+
+	r1 := (<-store.Post().GetFlaggedPosts(o1.ChannelId, 0, 2)).Data.(*model.PostList)
+
+	if len(r1.Order) != 0 {
+		t.Fatal("should be empty")
+	}
+
+	preferences := model.Preferences{
+		{
+			UserId:   o1.UserId,
+			Category: model.PREFERENCE_CATEGORY_FLAGGED_POST,
+			Name:     o1.Id,
+			Value:    "true",
+		},
+	}
+
+	Must(store.Preference().Save(&preferences))
+
+	r2 := (<-store.Post().GetFlaggedPosts(o1.UserId, 0, 2)).Data.(*model.PostList)
+
+	if len(r2.Order) != 1 {
+		t.Fatal("should have 1 post")
+	}
+
+	preferences = model.Preferences{
+		{
+			UserId:   o1.UserId,
+			Category: model.PREFERENCE_CATEGORY_FLAGGED_POST,
+			Name:     o2.Id,
+			Value:    "true",
+		},
+	}
+
+	Must(store.Preference().Save(&preferences))
+
+	r3 := (<-store.Post().GetFlaggedPosts(o1.UserId, 0, 1)).Data.(*model.PostList)
+
+	if len(r3.Order) != 1 {
+		t.Fatal("should have 1 post")
+	}
+
+	r4 := (<-store.Post().GetFlaggedPosts(o1.UserId, 0, 2)).Data.(*model.PostList)
+
+	if len(r4.Order) != 2 {
+		t.Fatal("should have 2 posts")
+	}
+}