Allow tag relations + bump ecto deps

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon_web/resolvers/tag.ex

@@ -0,0 +1,40 @@
+defmodule MobilizonWeb.Resolvers.Tag do
+  @moduledoc """
+  Handles the tag-related GraphQL calls
+  """
+  require Logger
+  alias Mobilizon.Events.Event
+  alias Mobilizon.Events.Tag
+
+  def list_tags(_parent, %{page: page, limit: limit}, _resolution) do
+    tags = Mobilizon.Events.list_tags(page, limit)
+
+    {:ok, tags}
+  end
+
+  @doc """
+  Retrieve the list of tags for an event
+  """
+  def list_tags_for_event(%Event{id: id}, _args, _resolution) do
+    {:ok, Mobilizon.Events.list_tags_for_event(id)}
+  end
+
+  @doc """
+  Retrieve the list of related tags for a given tag ID
+  """
+  def get_related_tags(_parent, %{tag_id: tag_id}, _resolution) do
+    with %Tag{} = tag <- Mobilizon.Events.get_tag!(tag_id),
+         tags <- Mobilizon.Events.tag_neighbors(tag) do
+      {:ok, tags}
+    end
+  end
+
+  @doc """
+  Retrieve the list of related tags for a parent tag
+  """
+  def get_related_tags(%Tag{} = tag, _args, _resolution) do
+    with tags <- Mobilizon.Events.tag_neighbors(tag) do
+      {:ok, tags}
+    end
+  end
+end