/**
 * footer.js
 *
 * Adds a class required to reveal the search in the handheld footer bar.
 * Also hides the handheld footer bar when an input is focused.
 */
( function() {
	"use strict";
	// Wait for DOM to be ready.
	document.addEventListener( 'DOMContentLoaded', function() {
		if ( 0 === document.getElementsByClassName( 'digitaz-handheld-footer-bar' ).length ) {
			return;
		}

		// Add class to footer search when clicked.
		[].forEach.call( document.querySelectorAll( '.digitaz-handheld-footer-bar .search > a' ), function( anchor ) {
			anchor.addEventListener( 'click', function( event ) {
				anchor.parentElement.classList.toggle( 'active' );
				event.preventDefault();
			} );
		} );

		// Add focus class to body when an input field is focused.
		// This is used to hide the Handheld Footer Bar when an input is focused.
		var footer_bar = document.getElementsByClassName( 'digitaz-handheld-footer-bar' );
		var forms      = document.forms;
		var isFocused  = function( focused ) {
			return function( event ) {
				if ( !! focused && event.target.tabIndex !== -1 ) {
					document.body.classList.add( 'sf-input-focused' );
				} else {
					document.body.classList.remove( 'sf-input-focused' );
				}
			};
		};

		if ( footer_bar.length && forms.length ) {
			for ( var i = 0; i < forms.length; i++ ) {
				if ( footer_bar[0].contains( forms[ i ] ) ) {
					continue;
				}

				forms[ i ].addEventListener( 'focus', isFocused( true ), true );
				forms[ i ].addEventListener( 'blur', isFocused( false ), true );
			}
		}
	} );
} )();