Merge pull request #2099 from Titonatos/Fix/#2083-Filtering-tasks-by-tags-does-not-work

Fix bug #2083 Filtering by tags doesn't work

Author: vtm9

services/app/apps/codebattle/lib/codebattle/task.ex

@@ -199,11 +199,19 @@ defmodule Codebattle.Task do
     !result
   end
 
-  @spec get_task_by_tags_for_user(User.t(), list(String.t())) :: t() | nil
-  def get_task_by_tags_for_user(user, tags) do
-    __MODULE__
+  @spec get_task_by_tags_for_user(User.t(), list(String.t()), String.t() | nil) :: t() | nil
+  def get_task_by_tags_for_user(user, tags, level \\ nil) do
+    query = __MODULE__
     |> filter_visibility(user)
     |> where([t], fragment("? @> ?", t.tags, ^tags))
+
+    query = if level do
+      query |> where([t], t.level == ^level)
+    else
+      query
+    end
+
+    query
     |> order_by(fragment("RANDOM()"))
     |> limit(1)
     |> Repo.one()

services/app/apps/codebattle/lib/codebattle_web/channels/lobby_channel.ex

@@ -124,7 +124,8 @@ defmodule CodebattleWeb.LobbyChannel do
   end
 
   defp maybe_add_task(params, %{"task_tags" => task_tags}, user) when length(task_tags) > 0 do
-    case Codebattle.Task.get_task_by_tags_for_user(user, task_tags) do
+    level = Map.get(params, :level)
+    case Codebattle.Task.get_task_by_tags_for_user(user, task_tags, level) do
       nil -> params
       task -> Map.put(params, :task, task)
     end