1 files changed, 109 insertions, 0 deletions

diff --git a/app/graphql/mutations/issues/create.rb b/app/graphql/mutations/issues/create.rb
new file mode 100644
index 00000000000..1454916bc77
--- /dev/null
+++ b/app/graphql/mutations/issues/create.rb
@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+module Mutations
+  module Issues
+    class Create < BaseMutation
+      include ResolvesProject
+      graphql_name 'CreateIssue'
+
+      authorize :create_issue
+
+      include CommonMutationArguments
+
+      argument :project_path, GraphQL::ID_TYPE,
+               required: true,
+               description: 'Project full path the issue is associated with'
+
+      argument :iid, GraphQL::INT_TYPE,
+               required: false,
+               description: 'The IID (internal ID) of a project issue. Only admins and project owners can modify'
+
+      argument :title, GraphQL::STRING_TYPE,
+               required: true,
+               description: copy_field_description(Types::IssueType, :title)
+
+      argument :milestone_id, ::Types::GlobalIDType[::Milestone],
+               required: false,
+               description: 'The ID of the milestone to assign to the issue. On update milestone will be removed if set to null'
+
+      argument :labels, [GraphQL::STRING_TYPE],
+               required: false,
+               description: copy_field_description(Types::IssueType, :labels)
+
+      argument :label_ids, [::Types::GlobalIDType[::Label]],
+               required: false,
+               description: 'The IDs of labels to be added to the issue'
+
+      argument :created_at, Types::TimeType,
+               required: false,
+               description: 'Timestamp when the issue was created. Available only for admins and project owners'
+
+      argument :merge_request_to_resolve_discussions_of, ::Types::GlobalIDType[::MergeRequest],
+               required: false,
+               description: 'The IID of a merge request for which to resolve discussions'
+
+      argument :discussion_to_resolve, GraphQL::STRING_TYPE,
+               required: false,
+               description: 'The ID of a discussion to resolve. Also pass `merge_request_to_resolve_discussions_of`'
+
+      argument :assignee_ids, [::Types::GlobalIDType[::User]],
+               required: false,
+               description: 'The array of user IDs to assign to the issue'
+
+      field :issue,
+            Types::IssueType,
+            null: true,
+            description: 'The issue after mutation'
+
+      def ready?(**args)
+        if args.slice(*mutually_exclusive_label_args).size > 1
+          arg_str = mutually_exclusive_label_args.map { |x| x.to_s.camelize(:lower) }.join(' or ')
+          raise Gitlab::Graphql::Errors::ArgumentError, "one and only one of #{arg_str} is required."
+        end
+
+        if args[:discussion_to_resolve].present? && args[:merge_request_to_resolve_discussions_of].blank?
+          raise Gitlab::Graphql::Errors::ArgumentError,
+                'to resolve a discussion please also provide `merge_request_to_resolve_discussions_of` parameter'
+        end
+
+        super
+      end
+
+      def resolve(project_path:, **attributes)
+        project = authorized_find!(full_path: project_path)
+        params = build_create_issue_params(attributes.merge(author_id: current_user.id))
+
+        issue = ::Issues::CreateService.new(project, current_user, params).execute
+
+        if issue.spam?
+          issue.errors.add(:base, 'Spam detected.')
+        end
+
+        {
+          issue: issue.valid? ? issue : nil,
+          errors: errors_on_object(issue)
+        }
+      end
+
+      private
+
+      def build_create_issue_params(params)
+        params[:milestone_id] &&= params[:milestone_id]&.model_id
+        params[:assignee_ids] &&= params[:assignee_ids].map { |assignee_id| assignee_id&.model_id }
+        params[:label_ids] &&= params[:label_ids].map { |label_id| label_id&.model_id }
+
+        params
+      end
+
+      def mutually_exclusive_label_args
+        [:labels, :label_ids]
+      end
+
+      def find_object(full_path:)
+        resolve_project(full_path: full_path)
+      end
+    end
+  end
+end
+
+Mutations::Issues::Create.prepend_if_ee('::EE::Mutations::Issues::Create')