1 files changed, 70 insertions, 0 deletions
diff --git a/app/graphql/resolvers/user_merge_requests_resolver_base.rb b/app/graphql/resolvers/user_merge_requests_resolver_base.rb
new file mode 100644
index 00000000000..47967fe69f9
--- /dev/null
+++ b/app/graphql/resolvers/user_merge_requests_resolver_base.rb
@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+module Resolvers
+  class UserMergeRequestsResolverBase < MergeRequestsResolver
+    include ResolvesProject
+
+    argument :project_path, GraphQL::STRING_TYPE,
+          required: false,
+          description: 'The full-path of the project the authored merge requests should be in. Incompatible with projectId.'
+
+    argument :project_id, ::Types::GlobalIDType[::Project],
+          required: false,
+          description: 'The global ID of the project the authored merge requests should be in. Incompatible with projectPath.'
+
+    attr_reader :project
+    alias_method :user, :synchronized_object
+
+    def ready?(project_id: nil, project_path: nil, **args)
+      return early_return unless can_read_profile?
+
+      if project_id || project_path
+        load_project(project_path, project_id)
+        return early_return unless can_read_project?
+      elsif args[:iids].present?
+        raise ::Gitlab::Graphql::Errors::ArgumentError,
+          'iids requires projectPath or projectId'
+      end
+
+      super(**args)
+    end
+
+    def resolve(**args)
+      prepare_args(args)
+      key = :"#{user_role}_id"
+      super(key => user.id, **args)
+    end
+
+    def user_role
+      raise NotImplementedError
+    end
+
+    private
+
+    def can_read_profile?
+      Ability.allowed?(current_user, :read_user_profile, user)
+    end
+
+    def can_read_project?
+      Ability.allowed?(current_user, :read_merge_request, project)
+    end
+
+    def load_project(project_path, project_id)
+      # TODO: remove this line when the compatibility layer is removed
+      # See: https://gitlab.com/gitlab-org/gitlab/-/issues/257883
+      project_id &&= ::Types::GlobalIDType[::Project].coerce_isolated_input(project_id)
+      @project = ::Gitlab::Graphql::Lazy.force(resolve_project(full_path: project_path, project_id: project_id))
+    end
+
+    def no_results_possible?(args)
+      some_argument_is_empty?(args)
+    end
+
+    # These arguments are handled in load_project, and should not be passed to
+    # the finder directly.
+    def prepare_args(args)
+      args.delete(:project_id)
+      args.delete(:project_path)
+    end
+  end
+end