CaffGeek/MBACNationals

/* global adminpage */
// Interim login dialog
(function($){
    var wrap, next;

    function show() {
        var parent = $('#wp-auth-check'),
            form = $('#wp-auth-check-form'),
            noframe = wrap.find('.wp-auth-fallback-expired'),
            frame, loaded = false;

        if ( form.length ) {
            // Add unload confirmation to counter (frame-busting) JS redirects
            $(window).on( 'beforeunload.wp-auth-check', function(e) {
                e.originalEvent.returnValue = window.authcheckL10n.beforeunload;
            });

            frame = $('<iframe id="wp-auth-check-frame" frameborder="0">').attr( 'title', noframe.text() );
            frame.load( function() {
                var height, body;

                loaded = true;

                try {
                    body = $(this).contents().find('body');
                    height = body.height();
                } catch(e) {
                    wrap.addClass('fallback');
                    parent.css( 'max-height', '' );
                    form.remove();
                    noframe.focus();
                    return;
                }

                if ( height ) {
                    if ( body && body.hasClass('interim-login-success') )
                        hide();
                    else
                        parent.css( 'max-height', height + 40 + 'px' );
                } else if ( ! body || ! body.length ) {
                    // Catch "silent" iframe origin exceptions in WebKit after another page is loaded in the iframe
                    wrap.addClass('fallback');
                    parent.css( 'max-height', '' );
                    form.remove();
                    noframe.focus();
                }
            }).attr( 'src', form.data('src') );

            $('#wp-auth-check-form').append( frame );
        }

        wrap.removeClass('hidden');

        if ( frame ) {
            frame.focus();
            // WebKit doesn't throw an error if the iframe fails to load because of "X-Frame-Options: DENY" header.
            // Wait for 10 sec. and switch to the fallback text.
            setTimeout( function() {
                if ( ! loaded ) {
                    wrap.addClass('fallback');
                    form.remove();
                    noframe.focus();
                }
            }, 10000 );
        } else {
            noframe.focus();
        }
    }

    function hide() {
        $(window).off( 'beforeunload.wp-auth-check' );

        // When on the Edit Post screen, speed up heartbeat after the user logs in to quickly refresh nonces
        if ( typeof adminpage !== 'undefined' && ( adminpage === 'post-php' || adminpage === 'post-new-php' ) &&
            typeof wp !== 'undefined' && wp.heartbeat ) {

            wp.heartbeat.connectNow();
        }

        wrap.fadeOut( 200, function() {
            wrap.addClass('hidden').css('display', '');
            $('#wp-auth-check-frame').remove();
        });
    }

    function schedule() {
        var interval = parseInt( window.authcheckL10n.interval, 10 ) || 180; // in seconds, default 3 min.
        next = ( new Date() ).getTime() + ( interval * 1000 );
    }

    $( document ).on( 'heartbeat-tick.wp-auth-check', function( e, data ) {
        if ( 'wp-auth-check' in data ) {
            schedule();
            if ( ! data['wp-auth-check'] && wrap.hasClass('hidden') ) {
                show();
            } else if ( data['wp-auth-check'] && ! wrap.hasClass('hidden') ) {
                hide();
            }
        }
    }).on( 'heartbeat-send.wp-auth-check', function( e, data ) {
        if ( ( new Date() ).getTime() > next ) {
            data['wp-auth-check'] = true;
        }
    }).ready( function() {
        schedule();
        wrap = $('#wp-auth-check-wrap');
        wrap.find('.wp-auth-check-close').on( 'click', function() {
            hide();
        });
    });

}(jQuery));