Add support for filtering by multiple actions

Apply suggestion to spec/finders/todos_finder_spec.rb
Apply suggestion to spec/finders/todos_finder_spec.rb

app/finders/todos_finder.rb

@@ -65,8 +65,20 @@ class TodosFinder
     params[:action_id]
   end
 
+  def action_array_provided?
+    params[:action].is_a?(Array)
+  end
+
+  def map_actions_to_ids
+    params[:action].map { |item| Todo::ACTION_NAMES.key(item.to_sym) }
+  end
+
   def to_action_id
-    Todo::ACTION_NAMES.key(action.to_sym)
+    if action_array_provided?
+      map_actions_to_ids
+    else
+      Todo::ACTION_NAMES.key(action.to_sym)
+    end
   end
 
   def action?
@@ -133,9 +145,19 @@ class TodosFinder
     end
   end
 
+  def action_id_array_provided?
+    params[:action_id].is_a?(Array) && params[:action_id].any?
+  end
+
+  def by_action_ids(items)
+    items.for_action(action_id)
+  end
+
   def by_action_id(items)
+    return by_action_ids(items) if action_id_array_provided?
+
     if action_id?
-      items.for_action(action_id)
+      by_action_ids(items)
     else
       items
     end

spec/finders/todos_finder_spec.rb

@@ -36,6 +36,43 @@ describe TodosFinder do
           expect(todos).to match_array([todo1])
         end
 
+        context 'when filtering for actions' do
+          let!(:todo1) { create(:todo, user: user, project: project, target: issue, action: Todo::ASSIGNED) }
+          let!(:todo2) { create(:todo, user: user, group: group, target: merge_request, action: Todo::DIRECTLY_ADDRESSED) }
+
+          context 'by action ids' do
+            it 'returns the expected todos' do
+              todos = finder.new(user, { action_id: Todo::DIRECTLY_ADDRESSED }).execute
+
+              expect(todos).to match_array([todo2])
+            end
+
+            context 'multiple actions' do
+              it 'returns the expected todos' do
+                todos = finder.new(user, { action_id: [Todo::DIRECTLY_ADDRESSED, Todo::ASSIGNED] }).execute
+
+                expect(todos).to match_array([todo2, todo1])
+              end
+            end
+          end
+
+          context 'by action names' do
+            it 'returns the expected todos' do
+              todos = finder.new(user, { action: :directly_addressed }).execute
+
+              expect(todos).to match_array([todo2])
+            end
+
+            context 'multiple actions' do
+              it 'returns the expected todos' do
+                todos = finder.new(user, { action: [:directly_addressed, :assigned] }).execute
+
+                expect(todos).to match_array([todo2, todo1])
+              end
+            end
+          end
+        end
+
         context 'with subgroups' do
           let(:subgroup) { create(:group, parent: group) }
           let!(:todo3) { create(:todo, user: user, group: subgroup, target: issue) }