GraphQL mutations for add, remove and toggle emoji62826-graphql-emoji-mutations

Adding new `AddAwardEmoji`, `RemoveAwardEmoji` and `ToggleAwardEmoji`
GraphQL mutations.

Adding new `#authorized_find_with_pre_checks!` and (unused, but for
completeness `#authorized_find_with_post_checks!`) authorization
methods. These allow us to perform an authorized find, and run our own
additional checks before or after the authorization runs.

https://gitlab.com/gitlab-org/gitlab-ce/issues/62826

2 files changed, 22 insertions, 0 deletions

diff --git a/lib/gitlab/graphql/copy_field_description.rb b/lib/gitlab/graphql/copy_field_description.rb
new file mode 100644
index 00000000000..edd73083ff2
--- /dev/null
+++ b/lib/gitlab/graphql/copy_field_description.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Graphql
+    module CopyFieldDescription
+      extend ActiveSupport::Concern
+
+      class_methods do
+        # Returns the `description` for property of field `field_name` on type.
+        # This can be used to ensure, for example, that mutation argument descriptions
+        # are always identical to the corresponding query field descriptions.
+        #
+        # E.g.:
+        #   argument :name, GraphQL::STRING_TYPE, description: copy_field_description(Types::UserType, :name)
+        def copy_field_description(type, field_name)
+          type.fields[field_name.to_s.camelize(:lower)].description
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/graphql/errors.rb b/lib/gitlab/graphql/errors.rb
index fe74549e322..40b90310e8b 100644
--- a/lib/gitlab/graphql/errors.rb
+++ b/lib/gitlab/graphql/errors.rb
@@ -6,6 +6,7 @@ module Gitlab
       BaseError = Class.new(GraphQL::ExecutionError)
       ArgumentError = Class.new(BaseError)
       ResourceNotAvailable = Class.new(BaseError)
+      MutationError = Class.new(BaseError)
     end
   end
 end