mediawiki-extensions-CookieWarning/resources/ext.CookieWarning/ext.CookieWarning.js

( function ( mw, $ ) {
	/**
	 * Sets the cookie, that the cookiewarning is dismissed. Called,
	 * when the api query to save this information in the user preferences,
	 * failed for any reason.
	 */
	function setCookie() {
		mw.cookie.set( 'cookiewarning_dismissed', true );
	}

	// Click handler for the "Ok" element in the cookiewarning information bar
	$( '.mw-cookiewarning-dismiss' ).on( 'click', function ( ev ) {
		// an anonymous user doesn't have preferences, so don't try to save this in
		// the user preferences.
		if ( !mw.user.isAnon() ) {
			// try to save, that the cookiewarning was disabled, in the user preferences
			new mw.Api().postWithToken( 'options', {
				action: 'options',
				change: 'cookiewarning_dismissed=1'
			} ).fail( function ( code, result ) {
				// if it fails, fall back to the cookie
				mw.log.warn( 'Failed to save dismissed CookieWarning: ' + code + '\n' + result.error + '. Using cookie now.' );
				setCookie();
			} );
		} else {
			// use cookies for anonymous users
			setCookie();
		}
		// always remove the cookiewarning element
		$( '.mw-cookiewarning-container' ).detach();

		ev.preventDefault();
	} );
} )( mediaWiki, jQuery );