/*!
 * Add autocomplete suggestions for names of registered users.
 */
( function () {
	let api;

	const config = {
		fetch: function ( userInput, response, maxRows ) {
			const node = this[ 0 ];

			api = api || new mw.Api();

			$.data( node, 'request', api.get( {
				formatversion: 2,
				action: 'query',
				list: 'allusers',
				auprefix: userInput,
				aulimit: maxRows
			} ).done( ( data ) => {
				const users = data.query.allusers.map( ( userObj ) => userObj.name );
				response( users );
			} ) );
		},
		cancel: function () {
			const node = this[ 0 ],
				request = $.data( node, 'request' );

			if ( request ) {
				request.abort();
				$.removeData( node, 'request' );
			}
		}
	};

	$( () => {
		$( '.mw-autocomplete-user' ).suggestions( config );
	} );
}() );