1 files changed, 90 insertions, 0 deletions
diff --git a/app/graphql/resolvers/todo_resolver.rb b/app/graphql/resolvers/todo_resolver.rb
new file mode 100644
index 00000000000..38a4539f34a
--- /dev/null
+++ b/app/graphql/resolvers/todo_resolver.rb
@@ -0,0 +1,90 @@
+# frozen_string_literal: true
+
+module Resolvers
+  class TodoResolver < BaseResolver
+    type Types::TodoType, null: true
+
+    alias_method :user, :object
+
+    argument :action, [Types::TodoActionEnum],
+             required: false,
+             description: 'The action to be filtered'
+
+    argument :author_id, [GraphQL::ID_TYPE],
+             required: false,
+             description: 'The ID of an author'
+
+    argument :project_id, [GraphQL::ID_TYPE],
+             required: false,
+             description: 'The ID of a project'
+
+    argument :group_id, [GraphQL::ID_TYPE],
+             required: false,
+             description: 'The ID of a group'
+
+    argument :state, [Types::TodoStateEnum],
+             required: false,
+             description: 'The state of the todo'
+
+    argument :type, [Types::TodoTargetEnum],
+             required: false,
+             description: 'The type of the todo'
+
+    def resolve(**args)
+      return Todo.none if user != context[:current_user]
+
+      TodosFinder.new(user, todo_finder_params(args)).execute
+    end
+
+    private
+
+    # TODO: Support multiple queries for e.g. state and type on TodosFinder:
+    #
+    # https://gitlab.com/gitlab-org/gitlab/merge_requests/18487
+    # https://gitlab.com/gitlab-org/gitlab/merge_requests/18518
+    #
+    # As soon as these MR's are merged, we can refactor this to query by
+    # multiple contents.
+    #
+    def todo_finder_params(args)
+      {
+        state: first_state(args),
+        type: first_type(args),
+        group_id: first_group_id(args),
+        author_id: first_author_id(args),
+        action_id: first_action(args),
+        project_id: first_project(args)
+      }
+    end
+
+    def first_project(args)
+      first_query_field(args, :project_id)
+    end
+
+    def first_action(args)
+      first_query_field(args, :action)
+    end
+
+    def first_author_id(args)
+      first_query_field(args, :author_id)
+    end
+
+    def first_group_id(args)
+      first_query_field(args, :group_id)
+    end
+
+    def first_state(args)
+      first_query_field(args, :state)
+    end
+
+    def first_type(args)
+      first_query_field(args, :type)
+    end
+
+    def first_query_field(query, field)
+      return unless query.key?(field)
+
+      query[field].first if query[field].respond_to?(:first)
+    end
+  end
+end