/* global wpcom_reblog */

var jetpackLikesWidgetBatch = [];
var jetpackLikesMasterReady = false;

// Due to performance problems on pages with a large number of widget iframes that need to be loaded,
// we are limiting the processing at any instant to unloaded widgets that are currently in viewport,
// plus this constant that will allow processing of widgets above and bellow the current fold.
// This aim of it is to improve the UX and hide the transition from unloaded to loaded state from users.
var jetpackLikesLookAhead = 2000; // pixels

// Keeps track of loaded comment likes widget so we can unload them when they are scrolled out of view.
var jetpackCommentLikesLoadedWidgets = [];

var jetpackLikesDocReadyPromise = new Promise( resolve => {
	if ( document.readyState !== 'loading' ) {
		resolve();
	} else {
		window.addEventListener( 'DOMContentLoaded', () => resolve() );
	}
} );

function JetpackLikesPostMessage( message, target ) {
	if ( typeof message === 'string' ) {
		try {
			message = JSON.parse( message );
		} catch ( e ) {
			return;
		}
	}

	if ( target && typeof target.postMessage === 'function' ) {
		try {
			target.postMessage(
				JSON.stringify( {
					type: 'likesMessage',
					data: message,
				} ),
				'*'
			);
		} catch ( e ) {
			return;
		}
	}
}

function JetpackLikesBatchHandler() {
	const requests = [];
	document.querySelectorAll( 'div.jetpack-likes-widget-unloaded' ).forEach( widget => {
		if ( jetpackLikesWidgetBatch.indexOf( widget.id ) > -1 ) {
			return;
		}

		if ( ! jetpackIsScrolledIntoView( widget ) ) {
			return;
		}

		jetpackLikesWidgetBatch.push( widget.id );

		var regex = /like-(post|comment)-wrapper-(\d+)-(\d+)-(\w+)/,
			match = regex.exec( widget.id ),
			info;

		if ( ! match || match.length !== 5 ) {
			return;
		}

		info = {
			blog_id: match[ 2 ],
			width: widget.width,
		};

		if ( 'post' === match[ 1 ] ) {
			info.post_id = match[ 3 ];
		} else if ( 'comment' === match[ 1 ] ) {
			info.comment_id = match[ 3 ];
		}

		info.obj_id = match[ 4 ];

		requests.push( info );
	} );

	if ( requests.length > 0 ) {
		JetpackLikesPostMessage(
			{ event: 'initialBatch', requests: requests },
			window.frames[ 'likes-master' ]
		);
	}
}

function JetpackLikesMessageListener( event ) {
	let message = event && event.data;
	if ( typeof message === 'string' ) {
		try {
			message = JSON.parse( message );
		} catch ( err ) {
			return;
		}
	}

	const type = message && message.type;
	const data = message && message.data;

	if ( type !== 'likesMessage' || typeof data.event === 'undefined' ) {
		return;
	}

	// We only allow messages from one origin
	const allowedOrigin = 'https://widgets.wp.com';
	if ( allowedOrigin !== event.origin ) {
		return;
	}

	switch ( data.event ) {
		case 'masterReady':
			jetpackLikesDocReadyPromise.then( () => {
				jetpackLikesMasterReady = true;

				const stylesData = {
					event: 'injectStyles',
				};
				const sdTextColor = document.querySelector( '.sd-text-color' );
				const sdLinkColor = document.querySelector( '.sd-link-color' );
				const sdTextColorStyles = ( sdTextColor && getComputedStyle( sdTextColor ) ) || {};
				const sdLinkColorStyles = ( sdLinkColor && getComputedStyle( sdLinkColor ) ) || {};

				// enable reblogs if they are enabled for the page
				if ( document.body.classList.contains( 'jetpack-reblog-enabled' ) ) {
					JetpackLikesPostMessage( { event: 'reblogsEnabled' }, window.frames[ 'likes-master' ] );
				}

				stylesData.textStyles = {
					color: sdTextColorStyles[ 'color' ],
					fontFamily: sdTextColorStyles[ 'font-family' ],
					fontSize: sdTextColorStyles[ 'font-size' ],
					direction: sdTextColorStyles[ 'direction' ],
					fontWeight: sdTextColorStyles[ 'font-weight' ],
					fontStyle: sdTextColorStyles[ 'font-style' ],
					textDecoration: sdTextColorStyles[ 'text-decoration' ],
				};

				stylesData.linkStyles = {
					color: sdLinkColorStyles[ 'color' ],
					fontFamily: sdLinkColorStyles[ 'font-family' ],
					fontSize: sdLinkColorStyles[ 'font-size' ],
					textDecoration: sdLinkColorStyles[ 'text-decoration' ],
					fontWeight: sdLinkColorStyles[ 'font-weight' ],
					fontStyle: sdLinkColorStyles[ 'font-style' ],
				};

				JetpackLikesPostMessage( stylesData, window.frames[ 'likes-master' ] );

				JetpackLikesBatchHandler();
			} );

			break;

		// We're keeping this for planned future follow ups.
		// @see: https://github.com/Automattic/jetpack/pull/42361#discussion_r1995338815
		case 'showLikeWidget':
			break;

		// We're keeping this for planned future follow ups.
		// @see: https://github.com/Automattic/jetpack/pull/42361#discussion_r1995338815
		case 'showCommentLikeWidget':
			break;

		case 'killCommentLikes':
			// If kill switch for comment likes is enabled remove all widgets wrappers and `Loading...` placeholders.
			document
				.querySelectorAll( '.jetpack-comment-likes-widget-wrapper' )
				.forEach( wrapper => wrapper.remove() );
			break;

		case 'clickReblogFlair':
			if ( wpcom_reblog && typeof wpcom_reblog.toggle_reblog_box_flair === 'function' ) {
				wpcom_reblog.toggle_reblog_box_flair( data.obj_id, data.post_id );
			}
			break;

		case 'hideOtherGravatars': {
			hideLikersPopover();
			break;
		}

		case 'showOtherGravatars': {
			const container = document.querySelector( '#likes-other-gravatars' );

			if ( ! container ) {
				break;
			}

			const list = container.querySelector( 'ul' );

			container.style.display = 'none';
			list.innerHTML = '';

			container
				.querySelectorAll( '.likes-text span' )
				.forEach( item => ( item.textContent = data.totalLikesLabel ) );

			( data.likers || [] ).forEach( async ( liker, index ) => {
				if ( liker.profile_URL.substr( 0, 4 ) !== 'http' ) {
					// We only display gravatars with http or https schema
					return;
				}

				const element = document.createElement( 'li' );
				list.append( element );

				element.innerHTML = `
				<a href="${ encodeURI( liker.profile_URL ) }" rel="nofollow" target="_parent" class="wpl-liker">
					<img src="${ encodeURI( liker.avatar_URL ) }"
						alt=""
						style="width: 28px; height: 28px;" />
					<span></span>
				</a>
				`;


				// Add some extra attributes through native methods, to ensure strings are sanitized.
				element.classList.add( liker.css_class );
				element.querySelector( 'img' ).alt = data.avatarAltTitle.replace( '%s', liker.name );
				element.querySelector( 'span' ).innerText = liker.name;

				if ( index === data.likers.length - 1 ) {
					element.addEventListener( 'keydown', ( e ) => {
						if ( e.key === 'Tab' && ! e.shiftKey ) {
							e.preventDefault();
							hideLikersPopover();

							JetpackLikesPostMessage(
								{ event: 'focusLikesCount', parent: data.parent },
								window.frames[ 'likes-master' ]
							);
						}
					} );
				}
			} );

			const positionPopup = function() {
				const containerStyle = getComputedStyle(container);
				const isRtl = containerStyle.direction === 'rtl';

				const el = document.querySelector( `*[name='${ data.parent }']` );
				const rect = el.getBoundingClientRect();
				const win = el.ownerDocument.defaultView;

				const offset = {
					top: rect.top + win.pageYOffset,
					left: rect.left + win.pageXOffset,
				};

				// don't display yet or we get skewed window.innerWidth later
				container.style.display = 'none';

				let containerLeft = 0;
				container.style.top = offset.top + data.position.top - 1 + 'px';

				if ( isRtl ) {
					const visibleAvatarsCount = data && data.likers ? Math.min( data.likers.length, 5 ) : 0;
					// 24px is the width of the avatar + 4px is the padding between avatars
					containerLeft = offset.left + data.position.left + 24 * visibleAvatarsCount + 4;
					container.style.transform = 'translateX(-100%)';
				} else {
					containerLeft = offset.left + data.position.left;
				}
				container.style.left = containerLeft + 'px';

				// Container width - padding
				const initContainerWidth = data.width - 20;
				const rowLength = Math.floor( initContainerWidth / 37 );
				// # of rows + (avatar + avatar padding) + text above + container padding
				let height = Math.ceil( data.likers.length / rowLength ) * 37 + 17 + 22;
				if ( height > 204 ) {
					height = 204;
				}

				// If the popup is overflows viewport width, we should show it on the next line
				// Push it offscreen to calculated rendered width
				const windowWidth = win.innerWidth;
				container.style.left = '-9999px';
				container.style.display = 'block';

				// If the popup exceeds the viewport width,
				// flip the position of the popup.
				const containerWidth = container.offsetWidth;
				const containerRight = containerLeft + containerWidth;

				if ( containerRight > windowWidth && ! isRtl) {
					containerLeft = rect.left + rect.width - containerWidth;
				} else if ( containerLeft - containerWidth < 0 && isRtl ) {
					container.style.transform = 'none';
					containerLeft = rect.left;
				}
				// Set the container left
				container.style.left = containerLeft + 'px';

				container.setAttribute( 'aria-hidden', 'false' );
			}

			positionPopup();
			container.focus();

			const debounce = function( func, wait ) {
				var timeout;
				return function() {
					var context = this;
					var args = arguments;
					clearTimeout( timeout );
					timeout = setTimeout( function() {
						func.apply( context, args );
					}, wait );
				};
			};

			const debouncedPositionPopup = debounce( positionPopup, 100 );

			// Keep a reference of this function in the element itself
			// so that we can destroy it later
			container.__resizeHandler = debouncedPositionPopup;

			// When window is resized, resize the popup.
			window.addEventListener( "resize", debouncedPositionPopup );
		}
	}
}

window.addEventListener( 'message', JetpackLikesMessageListener );

function hideLikersPopover() {
	const container = document.querySelector( '#likes-other-gravatars' );

	if ( container ) {
		container.style.display = 'none';
		container.setAttribute( 'aria-hidden', 'true' );

		// Remove the resize event listener and cleanup.
		const resizeHandler = container.__resizeHandler;
		if ( resizeHandler ) {
			window.removeEventListener( "resize", resizeHandler );
			delete container.__resizeHandler;
		}
	}
}

document.addEventListener( 'click', hideLikersPopover );

function JetpackLikesWidgetQueueHandler() {
	var wrapperID;

	if ( ! jetpackLikesMasterReady ) {
		setTimeout( JetpackLikesWidgetQueueHandler, 500 );
		return;
	}

	// Restore widgets to initial unloaded state when they are scrolled out of view.
	jetpackUnloadScrolledOutWidgets();

	var unloadedWidgetsInView = jetpackGetUnloadedWidgetsInView();

	if ( unloadedWidgetsInView.length > 0 ) {
		// Grab any unloaded widgets for a batch request
		JetpackLikesBatchHandler();
	}

	for ( var i = 0, length = unloadedWidgetsInView.length; i <= length - 1; i++ ) {
		wrapperID = unloadedWidgetsInView[ i ].id;

		if ( ! wrapperID ) {
			continue;
		}

		jetpackLoadLikeWidgetIframe( wrapperID );
	}
}

function jetpackLoadLikeWidgetIframe( wrapperID ) {
	if ( typeof wrapperID === 'undefined' ) {
		return;
	}

	const wrapper = document.querySelector( '#' + wrapperID );
	wrapper.querySelectorAll( 'iframe' ).forEach( iFrame => iFrame.remove() );

	const placeholder = wrapper.querySelector( '.likes-widget-placeholder' );

	// Post like iframe
	if ( placeholder && placeholder.classList.contains( 'post-likes-widget-placeholder' ) ) {
		const postLikesFrame = document.createElement( 'iframe' );

		postLikesFrame.classList.add( 'post-likes-widget', 'jetpack-likes-widget' );
		postLikesFrame.name = wrapper.dataset.name;
		postLikesFrame.src = wrapper.dataset.src;
		postLikesFrame.height = '55px';
		postLikesFrame.width = '100%';
		postLikesFrame.frameBorder = '0';
		postLikesFrame.scrolling = 'no';
		postLikesFrame.title = wrapper.dataset.title;

		placeholder.after( postLikesFrame );
	}

	// Comment like iframe
	if ( placeholder.classList.contains( 'comment-likes-widget-placeholder' ) ) {
		const commentLikesFrame = document.createElement( 'iframe' );

		commentLikesFrame.class = 'comment-likes-widget-frame jetpack-likes-widget-frame';
		commentLikesFrame.name = wrapper.dataset.name;
		commentLikesFrame.src = wrapper.dataset.src;
		commentLikesFrame.height = '18px';
		commentLikesFrame.width = '100%';
		commentLikesFrame.frameBorder = '0';
		commentLikesFrame.scrolling = 'no';

		wrapper.querySelector( '.comment-like-feedback' ).after( commentLikesFrame );

		jetpackCommentLikesLoadedWidgets.push( commentLikesFrame );
	}

	wrapper.classList.remove( 'jetpack-likes-widget-unloaded' );
	wrapper.classList.add( 'jetpack-likes-widget-loading' );

	wrapper.querySelector( 'iframe' ).addEventListener( 'load', e => {
		JetpackLikesPostMessage(
			{ event: 'loadLikeWidget', name: e.target.name, width: e.target.width },
			window.frames[ 'likes-master' ]
		);

		wrapper.classList.remove( 'jetpack-likes-widget-loading' );
		wrapper.classList.add( 'jetpack-likes-widget-loaded' );
	} );
}

function jetpackGetUnloadedWidgetsInView() {
	const unloadedWidgets = document.querySelectorAll( 'div.jetpack-likes-widget-unloaded' );

	return [ ...unloadedWidgets ].filter( item => jetpackIsScrolledIntoView( item ) );
}

function jetpackIsScrolledIntoView( element ) {
	const top = element.getBoundingClientRect().top;
	const bottom = element.getBoundingClientRect().bottom;

	// Allow some slack above and bellow the fold with jetpackLikesLookAhead,
	// with the aim of hiding the transition from unloaded to loaded widget from users.
	return top + jetpackLikesLookAhead >= 0 && bottom <= window.innerHeight + jetpackLikesLookAhead;
}

function jetpackUnloadScrolledOutWidgets() {
	for ( let i = jetpackCommentLikesLoadedWidgets.length - 1; i >= 0; i-- ) {
		const currentWidgetIframe = jetpackCommentLikesLoadedWidgets[ i ];

		if ( ! jetpackIsScrolledIntoView( currentWidgetIframe ) ) {
			const widgetWrapper =
				currentWidgetIframe &&
				currentWidgetIframe.parentElement &&
				currentWidgetIframe.parentElement.parentElement;

			// Restore parent class to 'unloaded' so this widget can be picked up by queue manager again if needed.
			widgetWrapper.classList.remove( 'jetpack-likes-widget-loaded' );
			widgetWrapper.classList.remove( 'jetpack-likes-widget-loading' );
			widgetWrapper.classList.add( 'jetpack-likes-widget-unloaded' );

			// Bring back the loading placeholder into view.
			widgetWrapper
				.querySelectorAll( '.comment-likes-widget-placeholder' )
				.forEach( item => ( item.style.display = 'block' ) );

			// Remove it from the list of loaded widgets.
			jetpackCommentLikesLoadedWidgets.splice( i, 1 );

			// Remove comment like widget iFrame.
			currentWidgetIframe.remove();
		}
	}
}

var jetpackWidgetsDelayedExec = function ( after, fn ) {
	var timer;
	return function () {
		clearTimeout( timer );
		timer = setTimeout( fn, after );
	};
};

var jetpackOnScrollStopped = jetpackWidgetsDelayedExec( 250, JetpackLikesWidgetQueueHandler );

// Load initial batch of widgets, prior to any scrolling events.
JetpackLikesWidgetQueueHandler();

// Add event listener to execute queue handler after scroll.
window.addEventListener( 'scroll', jetpackOnScrollStopped, true );
;
/**
 * Comment Likes - JavaScript
 *
 * This handles liking and unliking comments, as well as viewing who has
 * liked a particular comment.
 *
 * @dependency  Swipe (dynamically loaded when needed)
 *
 * @package     Comment_Likes
 * @subpackage  JavaScript
 */
(function () {
	function init() {
		let extWin;
		let extWinCheck;
		let commentLikeEvent;

		// Only run once.
		if (window.comment_likes_loaded) {
			return;
		}
		window.comment_likes_loaded = true;

		// Client-side cache of who liked a particular comment to avoid
		// having to hit the server multiple times for the same data.
		const commentLikeCache = {};

		let swipeLibPromise;

		// Load the Swipe library, if it's not already loaded.
		function swipeLibLoader() {
			if (!swipeLibPromise) {
				swipeLibPromise = new Promise((resolve, reject) => {
					if (window.Swipe) {
						resolve(window.Swipe);
					} else {
						const swipeScript = document.createElement('script');
						swipeScript.src = comment_like_text.swipeUrl;
						swipeScript.async = true;
						document.body.appendChild(swipeScript);
						swipeScript.addEventListener('load', () => resolve(window.Swipe));
						swipeScript.addEventListener('error', error => reject(error));
					}
				});
			}
			return swipeLibPromise;
		}

		/**
		 * Parse the comment ID from a comment like link.
		 */
		function getCommentId(link) {
			const commentId =
				link && link.getAttribute('href') && link.getAttribute('href').split('like_comment=');
			return commentId[1].split('&_wpnonce=')[0];
		}

		/**
		 * Handle an ajax action on the comment like link.
		 */
		function handleLinkAction(link, action, commentId, callback) {
			const nonce =
				link && link.getAttribute('href') && link.getAttribute('href').split('_wpnonce=')[1];

			fetch('/wp-admin/admin-ajax.php', {
				method: 'POST',
				body: new URLSearchParams({
					action: action,
					_wpnonce: nonce,
					like_comment: commentId,
					blog_id: Number(link.dataset.blog),
				}),
				headers: {
					'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
					'X-Requested-With': 'XMLHttpRequest',
					Accept: 'application/json',
					'cache-control': 'no-cache',
					pragma: 'no-cache',
				},
			})
				.then(response => response.json())
				.then(callback);
		}

		function startPolling() {
			// Append cookie polling login iframe to this window to wait for user to finish logging in (or cancel)
			const loginIframe = document.createElement('iframe');
			loginIframe.id = 'wp-login-polling-iframe';
			loginIframe.src = 'https://wordpress.com/public.api/connect/?iframe=true';
			document.body.appendChild(loginIframe);
			loginIframe.style.display = 'none';
		}

		function stopPolling() {
			const iframe = document.querySelector('#wp-login-polling-iframe');
			if (iframe) {
				iframe.remove();
			}
		}

		function hide(el) {
			if (el && el.style) {
				el.style.display = 'none';
			}
		}

		function show(el) {
			if (el && el.style) {
				el.style.removeProperty('display');
			}
		}

		// Overlay used for displaying comment like info.
		class Overlay {
			constructor() {
				// Overlay element.
				this.el = document.createElement('div');
				this.el.classList.add('comment-likes-overlay');
				document.body.appendChild(this.el);
				hide(this.el);

				this.el.addEventListener('mouseenter', () => {
					// Don't hide the overlay if the user is mousing over it.
					overlay.cancelHide();
				});

				this.el.addEventListener('mouseleave', () => overlay.requestHide());

				// Inner contents of overlay.
				this.innerEl = null;

				// Instance of the Swipe library.
				this.swipe = null;

				// Timeout used for hiding the overlay.
				this.hideTimeout = null;
			}

			// Initialise the overlay for use, removing any old content.
			clear() {
				// Unload any previous instance of Swipe (to avoid leaking a global
				// event handler). This is done before clearing the contents of the
				// overlay because Swipe expects the slides to still be present.
				if (this.swipe) {
					this.swipe.kill();
					this.swipe = null;
				}
				this.el.innerHTML = '';
				this.innerEl = document.createElement('div');
				this.innerEl.classList.add('inner');
				this.el.appendChild(this.innerEl);
			}

			/**
			 * Construct a list (<ul>) of user (gravatar, name) details.
			 *
			 * @param  data     liker data returned from the server
			 * @param  klass    CSS class to apply to the <ul> element
			 * @param  start    index of user to start at
			 * @param  length   number of users to include in the list
			 *
			 * @return          A container element with the list
			 */
			getUserBits(data, klass, start, length) {
				start = start || 0;
				let last = start + (length || data.length);
				last = last > data.length ? data.length : last;
				const container = document.createElement('div');
				container.classList.add('liker-list');
				let html = `<ul class="${klass || ''}">`;
				for (let i = start; i < last; ++i) {
					const user = data[i];
					html += `
						<li>
							<a rel="nofollow" title="${user.display_name_esc}" href="${user.profile_url_esc}">
								<img src="${user.avatar_url_esc}" alt="${user.display_name_esc}" />
								<span class="user-name">${user.display_name_esc}</span>
							</a>
						</li>
					`;
				}
				html += '</ul>';
				container.innerHTML = html;
				return container;
			}

			/**
			 * Render the display of who has liked this comment. The type of
			 * display depends on how many people have liked the comment.
			 * If more than 10 people have liked the comment, this function
			 * renders navigation controls and sets up the Swipe library for
			 * changing between pages.
			 *
			 * @param link  the element over which the user is hovering
			 * @param data  the results retrieved from the server
			 */
			showLikes(link, data) {
				this.clear();

				link.dataset.likeCount = data.length;
				if (data.length === 0) {
					// No likers after all.
					hide(this.el);
					return;
				}

				this.innerEl.style.padding = '12px';

				if (data.length < 6) {
					// Only one column needed.
					this.innerEl.style.maxWidth = '200px';
					this.innerEl.innerHTML = '';
					this.innerEl.appendChild(this.getUserBits(data, 'single'));
					this.setPosition(link);
				} else if (data.length < 11) {
					// Two columns, but only one page.
					this.innerEl.innerHTML = '';
					this.innerEl.appendChild(this.getUserBits(data, 'double'));
					this.setPosition(link);
				} else {
					// Multiple pages.
					this.renderLikesWithPagination(data, link);
				}
			}

			/**
			 * Render multiple pages of likes with pagination controls.
			 * This function is intended to be called by `showLikes` above.
			 *
			 * @param data  the results retrieved from the server
			 */
			renderLikesWithPagination(data, link) {
				swipeLibLoader().then(() => {
					const page_count = Math.ceil(data.length / 10);
					// Swipe requires two nested containers.
					const swipe = document.createElement('div');
					swipe.classList.add('swipe');
					this.innerEl.appendChild(swipe);

					const wrap = document.createElement('div');
					wrap.classList.add('swipe-wrap');
					swipe.appendChild(wrap);

					for (let i = 0; i < page_count; ++i) {
						wrap.appendChild(this.getUserBits(data, 'double', i * 10, 10));
					}

					/**
					 * Navigation controls.
					 * This is based on the Newdash controls found in
					 *    reader/recommendations-templates.php
					 */
					const nav = document.createElement('nav');
					nav.classList.add('slider-nav');

					let navContents = `
						<a href="#" class="prev">
							<span class="noticon noticon-previous" title="Previous" alt="<"></span>
						</a>
						<span class="position">
					`;
					for (let i = 0; i < page_count; ++i) {
						navContents += `<em data-page="${i}" class="${i === 0 ? 'on' : ''}">&bull;</em>`;
					}
					navContents += `
						</span>
						<a href="#" class="next">
							<span class="noticon noticon-next" title="Next" alt=">"></span>
						</a>
					`;
					this.innerEl.appendChild(nav);
					nav.innerHTML = navContents;

					/** Set up Swipe. **/
					// Swipe cannot be set up successfully unless its container
					// is visible, so we show it now.
					show(this.el);
					this.setPosition(link);

					this.swipe = new Swipe(swipe, {
						callback: function (pos) {
							// Update the pagination indicators.
							//
							// If there are exactly two pages, Swipe has a weird
							// special case where it duplicates both pages and
							// can return index 2 and 3 even though those aren't
							// real pages (see swipe.js, line 47). To deal with
							// this, we use the expression `pos % page_count`.
							pos = pos % page_count;
							nav.querySelectorAll('em').forEach(em => {
								const page = Number(em.dataset.page);
								em.setAttribute('class', pos === page ? 'on' : '');
							});
						},
					});

					nav.querySelectorAll('em').forEach(em => {
						em.addEventListener('click', e => {
							// Go to the page corresponding to the indicator clicked.
							this.swipe.slide(Number(em.dataset.page));
							e.preventDefault();
						});
					});
					// Previous and next buttons.
					nav.querySelector('.prev').addEventListener('click', e => {
						this.swipe.prev();
						e.preventDefault();
					});
					nav.querySelector('.next').addEventListener('click', e => {
						this.swipe.next();
						e.preventDefault();
					});
				});
			}

			/**
			 * Open the overlay and show a loading message.
			 */
			showLoadingMessage(link) {
				this.clear();
				this.innerEl.textContent = comment_like_text.loading;
				this.setPosition(link);
			}

			/**
			 * Position the overlay near the current comment.
			 *
			 * @param link  element near which to position the overlay
			 */
			setPosition(link) {
				// Prepare a down arrow icon for the bottom of the overlay.
				const icon = document.createElement('span');
				this.el.appendChild(icon);
				icon.classList.add('icon', 'noticon', 'noticon-downarrow');
				icon.style.textShadow = '0px 1px 1px rgb(223, 223, 223)';

				const rect = link.getBoundingClientRect();
				const win = document.defaultView;
				const offset = {
					top: rect.top + win.scrollY,
					left: rect.left + win.scrollX,
				};

				// Take measurements with the element fully visible.
				show(this.el);
				let left = offset.left - (this.el.offsetWidth - link.offsetWidth) / 2;
				left = left < 5 ? 5 : left;
				let top = offset.top - this.el.offsetHeight + 5;
				hide(this.el);

				const adminBar = document.querySelector('#wpadminbar');

				// Check if the overlay would appear off the screen.
				if (top < win.scrollY + ((adminBar && adminBar.offsetHeight) || 0)) {
					// We'll display the overlay beneath the link instead.
					top = offset.top + link.offsetHeight;
					// Instead of using the down arrow icon, use an up arrow.
					icon.remove();
					this.el.prepend(icon);
					icon.classList.remove('noticon-downarrow');
					icon.classList.add('noticon-uparrow');
					icon.style.textShadow = '0px -1px 1px rgb(223, 223, 223)';
					icon.style.verticalAlign = 'bottom';
				}

				this.el.style.left = `${left}px`;
				this.el.style.top = `${top}px`;
				show(this.el);

				// The height of the arrow icon differs slightly between browsers,
				// so we compute the margin here to make sure it isn't disjointed
				// from the overlay.
				icon.style.marginTop = `${icon.scrollHeight - 26}px`;
				icon.style.marginBottom = `${20 - icon.scrollHeight}px`;

				// Position the arrow to be horizontally centred on the link.
				icon.style.paddingLeft = `${
					offset.left - left + (link.offsetWidth - icon.scrollWidth) / 2
				}px`;
			}

			/**
			 * Return whether the overlay is visible.
			 */
			isVisible() {
				return this.el.style.getPropertyValue('display') !== 'none';
			}

			/**
			 * Request that the overlay be hidden after a short delay.
			 */
			requestHide() {
				if (this.hideTimeout !== null) {
					return;
				}
				this.hideTimeout = setTimeout(() => {
					hide(this.el);
					this.clear();
				}, 300);
			}

			/**
			 * Cancel a request to hide the overlay.
			 */
			cancelHide() {
				if (this.hideTimeout !== null) {
					clearTimeout(this.hideTimeout);
					this.hideTimeout = null;
				}
			}
		}

		// Overlay used for displaying comment like info.
		const overlay = new Overlay();

		// The most recent comment for which the user has requested to see
		// who liked it.
		var relevantComment;

		// Precache after this timeout.
		var precacheTimeout = null;

		/**
		 * Fetch the like data for a particular comment.
		 */
		function fetchLikeData(link, commentId) {
			commentLikeCache[commentId] = null;

			const container = link && link.parentElement && link.parentElement.parentElement;
			const star = container.querySelector('a.comment-like-link');
			star &&
				handleLinkAction(star, 'view_comment_likes', commentId, data => {
					// Populate the cache.
					commentLikeCache[commentId] = data;

					// Only show the overlay if the user is interested.
					if (overlay.isVisible() && relevantComment === commentId) {
						overlay.showLikes(link, data);
					}
				});
		}

		function readCookie(c) {
			const nameEQ = c + '=';
			const cookieStrings = document.cookie.split(';');

			for (let i = 0; i < cookieStrings.length; i++) {
				let cookieString = cookieStrings[i];
				while (cookieString.charAt(0) === ' ') {
					cookieString = cookieString.substring(1, cookieString.length);
				}
				if (cookieString.indexOf(nameEQ) === 0) {
					const chunk = cookieString.substring(nameEQ.length, cookieString.length);
					const pairs = chunk.split('&');
					const cookieData = {};
					for (let num = pairs.length - 1; num >= 0; num--) {
						const pair = pairs[num].split('=');
						cookieData[pair[0]] = decodeURIComponent(pair[1]);
					}
					return cookieData;
				}
			}
			return null;
		}

		function getServiceData() {
			const data = readCookie('wpc_wpc');
			if (data === null || typeof data.access_token === 'undefined' || !data.access_token) {
				return false;
			}
			return data;
		}

		function readMessage(msg) {
			const event = msg.data;

			if (typeof event.event === 'undefined') {
				return;
			}

			if (event.event === 'login' && event.success) {
				extWinCheck = setInterval(function () {
					if (!extWin || extWin.closed) {
						clearInterval(extWinCheck);
						if (getServiceData()) {
							// Load page in an iframe to get the current comment nonce
							const nonceIframe = document.createElement('iframe');
							nonceIframe.id = 'wp-login-comment-nonce-iframe';
							nonceIframe.style.display = 'none';
							nonceIframe.src = commentLikeEvent + '';
							document.body.appendChild(nonceIframe);

							const commentLikeId = (commentLikeEvent + '')
								.split('like_comment=')[1]
								.split('&_wpnonce=')[0];
							let c;

							// Set a 5 second timeout to redirect to the comment page without doing the Like as a fallback
							const commentLikeTimeout = setTimeout(() => {
								window.location = commentLikeEvent;
							}, 5000);

							// Check for a new nonced redirect and use that if available before timing out
							const commentLikeCheck = setInterval(() => {
								const iframe = document.querySelector('#wp-login-comment-nonce-iframe');
								if (iframe) {
									c = iframe.querySelector(`#comment-like-${commentLikeId} .comment-like-link`);
								}
								if (c && typeof c.href !== 'undefined') {
									clearTimeout(commentLikeTimeout);
									clearInterval(commentLikeCheck);
									window.location = c.href;
								}
							}, 100);
						}
					}
				}, 100);

				if (extWin) {
					if (!extWin.closed) {
						extWin.close();
					}
					extWin = false;
				}

				stopPolling();
			}
		}

		if (typeof window.postMessage !== 'undefined') {
			window.addEventListener('message', e => {
				let message = e && e.data;
				if (typeof message === 'string') {
					try {
						message = JSON.parse(message);
					} catch (err) {
						return;
					}
				}

				const type = message && message.type;
				if (type === 'loginMessage') {
					readMessage(message);
				}
			});
		}

		document.body.addEventListener('click', e => {
			let target = e.target;

			// Don't do anything when clicking on the "X people" link.
			if (target.matches('p.comment-likes a.view-likers')) {
				e.preventDefault();
				return;
			}

			// Retrieve the surrounding paragraph to the star, if it hasn't been liked.
			const notLikedPar = target.closest('p.comment-not-liked');

			// Return if not clicking on star or surrounding paragraph.
			if (!target.matches('a.comment-like-link') && !notLikedPar) {
				return;
			}

			// When a comment hasn't been liked, make the text clickable, too.
			if (notLikedPar) {
				target = notLikedPar.querySelector('a.comment-like-link');
				if (!target) {
					return;
				}
			}

			if (target.classList.contains('needs-login')) {
				e.preventDefault();
				commentLikeEvent = target;
				if (extWin) {
					if (!extWin.closed) {
						extWin.close();
					}
					extWin = false;
				}

				stopPolling();

				const url = 'https://wordpress.com/public.api/connect/?action=request&service=wordpress';
				extWin = window.open(
					url,
					'likeconn',
					'status=0,toolbar=0,location=1,menubar=0,directories=0,resizable=1,scrollbars=1,height=560,width=500'
				);

				startPolling();

				return false;
			}

			// Record that the user likes or does not like this comment.
			const commentId = getCommentId(target);
			target.classList.add('loading');

			let commentEl = document.querySelector(`p#comment-like-${commentId}`);
			// Determine whether to like or unlike based on whether the comment is
			// currently liked.
			const action =
				commentEl && commentEl.dataset.liked === 'comment-liked'
					? 'unlike_comment'
					: 'like_comment';
			handleLinkAction(target, action, commentId, data => {
				// Invalidate the like cache for this comment.
				delete commentLikeCache[commentId];

				const countEl = document.querySelector(`#comment-like-count-${data.context}`);
				if (countEl) {
					countEl.innerHTML = data.display;
				}

				commentEl = document.querySelector(`p#comment-like-${data.context}`);
				if (action === 'like_comment') {
					commentEl.classList.remove('comment-not-liked');
					commentEl.classList.add('comment-liked');
					commentEl.dataset.liked = 'comment-liked';
				} else {
					commentEl.classList.remove('comment-liked');
					commentEl.classList.add('comment-not-liked');
					commentEl.dataset.liked = 'comment-not-liked';
				}

				// Prefetch new data for this comment (if there are likers left).
				const parent = target.closest('.comment-likes');
				const link = parent && parent.querySelector('a.view-likers');
				if (link) {
					fetchLikeData(link, commentId);
				}

				target.classList.remove('loading');
			});
			e.preventDefault();
			e.stopPropagation();
		});

		document.body.addEventListener(
			'mouseenter',
			function (e) {
				if (!e.target.matches('p.comment-likes a.view-likers')) {
					return;
				}
				// Show the user a list of who has liked this comment.

				const link = e.target;
				if (Number(link.dataset.likeCount || 0) === 0) {
					// No one has liked this comment.
					return;
				}

				// Don't hide the overlay.
				overlay.cancelHide();

				// Get the comment ID.
				const container = link.parentElement && link.parentElement.parentElement;
				const star = container && container.querySelector('a.comment-like-link');
				const commentId = star && getCommentId(star);
				relevantComment = commentId;

				// Check if the list of likes for this comment is already in
				// the cache.
				if (commentId in commentLikeCache) {
					const entry = commentLikeCache[commentId];
					// Only display the likes if the ajax request is
					// actually done.
					if (entry !== null) {
						overlay.showLikes(link, entry);
					} else {
						// Make sure the overlay is visible (in case
						// the user moved the mouse away while loading
						// but then came back before it finished
						// loading).
						overlay.showLoadingMessage(link);
					}
					return;
				}

				// Position the "Loading..." overlay.
				overlay.showLoadingMessage(link);

				// Fetch the data.
				fetchLikeData(link, commentId);
			},
			true
		);

		document.body.addEventListener(
			'mouseleave',
			e => {
				if (!e.target.matches('p.comment-likes a.view-likers')) {
					return;
				}
				// User has moved cursor away - hide the overlay.
				overlay.requestHide();
			},
			true
		);

		document.body.addEventListener(
			'mouseenter',
			e => {
				if (!e.target.matches('.comment') || !e.target.querySelector('a.comment-like-link')) {
					return;
				}
				// User is moving over a comment - precache the comment like data.
				if (precacheTimeout !== null) {
					clearTimeout(precacheTimeout);
					precacheTimeout = null;
				}

				const star = e.target.querySelector('a.comment-like-link');
				const parent = star.closest('.comment-likes');
				const link = parent && parent.querySelector('a.view-likers');
				if (!link || Number(link.dataset.likeCount || 0) === 0) {
					// No likes.
					return;
				}
				const commentId = getCommentId(star);
				if (commentId in commentLikeCache) {
					// Already in cache.
					return;
				}

				precacheTimeout = setTimeout(() => {
					precacheTimeout = null;
					if (commentId in commentLikeCache) {
						// Was cached in the interim.
						return;
					}
					fetchLikeData(link, commentId);
				}, 1000);
			},
			true
		);
	}

	if (document.readyState !== 'loading') {
		init();
	} else {
		document.addEventListener('DOMContentLoaded', init);
	}
})();
;
/**
 * File skip-link-focus-fix.js.
 *
 * Helps with accessibility for keyboard only users.
 *
 * Learn more: https://git.io/vWdr2
 */
(function() {
	var isIe = /(trident|msie)/i.test( navigator.userAgent );

	if ( isIe && document.getElementById && window.addEventListener ) {
		window.addEventListener( 'hashchange', function() {
			var id = location.hash.substring( 1 ),
				element;

			if ( ! ( /^[A-z0-9_-]+$/.test( id ) ) ) {
				return;
			}

			element = document.getElementById( id );

			if ( element ) {
				if ( ! ( /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) ) ) {
					element.tabIndex = -1;
				}

				element.focus();
			}
		}, false );
	}
})();
;
/**
 * File navigation.js.
 *
 * Handles toggling the navigation menu for small screens and enables TAB key
 * navigation support for dropdown menus.
 */
( function( $ ) {

	var body, menuToggle, siteMenu, siteNavigation;

	function initMainNavigation( container ) {

		// Add dropdown toggle that displays child menu items.
		var dropdownToggle = $( '<button />', {
			'class': 'dropdown-toggle',
			'aria-expanded': false
		} ).append( $( '<span />', {
			'class': 'screen-reader-text',
			text: screenReaderText.expand
		} ) );

		container.find( '.menu-item-has-children > a' ).after( dropdownToggle );

		// Toggle buttons and submenu items with active children menu items.
		container.find( '.current-menu-ancestor > button' ).addClass( 'toggled-on' );
		container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' );

		// Add menu items with submenus to aria-haspopup="true".
		container.find( '.menu-item-has-children' ).attr( 'aria-haspopup', 'true' );

		container.find( '.dropdown-toggle' ).click( function( e ) {
			var _this            = $( this ),
				screenReaderSpan = _this.find( '.screen-reader-text' );

			e.preventDefault();
			_this.toggleClass( 'toggled-on' );
			_this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );

			// jscs:disable
			_this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
			// jscs:enable
			screenReaderSpan.text( screenReaderSpan.text() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand );
		} );
	}
	initMainNavigation( $( '#site-navigation' ) );

	siteMenu         = $( '#menu-primary' );
	siteNavigation   = $( '#site-navigation' );
	menuToggle       = siteNavigation.find( '.menu-toggle' );

	// Enable menuToggle.
	( function() {

		// Return early if menuToggle is missing.
		if ( ! menuToggle.length ) {
			return;
		}

		// Add an initial values for the attribute.
		menuToggle.add( siteNavigation ).attr( 'aria-expanded', 'false' );

		menuToggle.on( 'click.apostrophe', function() {
			$( this ).add( siteMenu ).add( siteNavigation ).toggleClass( 'toggled-on' );

			// jscs:disable
			$( this ).add( siteMenu ).add( siteNavigation ).attr( 'aria-expanded', $( this ).add( siteNavigation ).attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
			// jscs:enable
		} );
	} )();

	// Fix sub-menus for touch devices and better focus for hidden submenu items for accessibility.
	( function() {
		if ( ! siteNavigation.length || ! siteNavigation.children().length ) {
			return;
		}

		// Toggle `focus` class to allow submenu access on tablets.
		function toggleFocusClassTouchScreen() {
			if ( window.innerWidth >= 840 ) {
				$( document.body ).on( 'touchstart.apostrophe', function( e ) {
					if ( ! $( e.target ).closest( '.main-navigation li' ).length ) {
						$( '.main-navigation li' ).removeClass( 'focus' );
					}
				} );
				siteNavigation.find( '.menu-item-has-children > a' ).on( 'touchstart.apostrophe', function( e ) {
					var el = $( this ).parent( 'li' );

					if ( ! el.hasClass( 'focus' ) ) {
						e.preventDefault();
						el.toggleClass( 'focus' );
						el.siblings( '.focus' ).removeClass( 'focus' );
					}
				} );
			} else {
				siteNavigation.find( '.menu-item-has-children > a' ).unbind( 'touchstart.apostrophe' );
			}
		}

		if ( 'ontouchstart' in window ) {
			$( window ).on( 'resize.apostrophe', toggleFocusClassTouchScreen );
			toggleFocusClassTouchScreen();
		}

		siteNavigation.find( 'a' ).on( 'focus.apostrophe blur.apostrophe', function() {
			$( this ).parents( '.menu-item' ).toggleClass( 'focus' );
		} );
	} )();

	// Add the default ARIA attributes for the menu toggle and the navigations.
	function onResizeARIA() {
		if ( window.innerWidth < 840 ) {
			if ( menuToggle.hasClass( 'toggled-on' ) ) {
				menuToggle.attr( 'aria-expanded', 'true' );
				siteMenu.attr( 'aria-expanded', 'true' );
				siteNavigation.attr( 'aria-expanded', 'true' );
			} else {
				menuToggle.attr( 'aria-expanded', 'false' );
				siteMenu.attr( 'aria-expanded', 'false' );
				siteNavigation.attr( 'aria-expanded', 'false' );
			}
		} else {
			menuToggle.removeAttr( 'aria-expanded' );
			siteMenu.removeAttr( 'aria-expanded' );
			siteNavigation.removeAttr( 'aria-expanded' );
		}
	}

	$( document ).ready( function() {
		body = $( document.body );

		$( window )
			.on( 'load.apostrophe', onResizeARIA )
			.on( 'resize.apostrophe', onResizeARIA );
	} );

} )( jQuery );
;
/**
 * apostrophe.js
 *
 * Handles the basic JS functionality for our theme.
 */
( function($) {
	/*
	 * Count the number of images in each row in order to create the proper clearings.
	 * For the most part, this isn't necessary, but there are certain instances where
	 * the grid breaks at the wrong spot, making the whole layout look funky.
	 * To fix that, we're counting where we are in the grid layout based on the space
	 * each article uses, and adding a clearing class each time we drop to a new row.
	 */
	function countGrid() {
		var $body = $( 'body' );
		var $container = $( '#main #posts-wrapper' );
		var $button = $( '.menu-toggle' );

		// Only initiate script if the mobile menu toggle isn't showing and we're on a page that uses the grid.
		// Return otherwise.
		if ( ( 0 !== $button.offsetWidth && 0 !== $button.offsetHeight ) &&
				 ! ( $body.hasClass( 'archive' ) || $body.hasClass( 'blog' ) || $body.hasClass( 'search' ) ) ) {
			return;
		}

		var $articles = $container.find( '.hentry' );
		// This variable is used to count how far across the grid we are.
		var gridcount = 0;
		var gridcount_increment;

		$articles.each( function() {
			// If the article is featured, it takes up two blocks. If not, it takes up one.
			if ( $( this ).hasClass( 'apostrophe-featured' ) ) {
				gridcount_increment = 2;
			} else {
				gridcount_increment = 1;
			}
			// If we're at a newline in the grid, add a class to clear the previous line, and reset the grid count.
			if ( 3 < gridcount + gridcount_increment ) {
				gridcount = 0;
				$( this ).addClass( 'clear' );
			}
			gridcount = gridcount + gridcount_increment;
		} );
	} // countGrid

	// Set width of h2 elements inside the grid to make sure post titles don't overflow the container, and we're breaking long, one-word titles correctly.
	function blockWidth() {
		var $body = $( 'body' );
		if ( $body.hasClass( 'archive' ) || $body.hasClass( 'blog' ) || $body.hasClass( 'search' ) ) {

			if ( $( window ).innerWidth() > 767 ) {
				$( '.hentry' ).each( function() {
					$( this ).find( '.entry-title' ).width( $( this ).width() );
				} );
			} else {
				$( '.hentry' ).each( function() {
					$( this ).find( '.entry-title' ).attr( 'style', '' );
				} );
			}
		}
	}

	// Count grid blocks on page load
	$( document ).on( 'ready', function() {
		countGrid();
		blockWidth();
	});

	// ...and on each subsequent Infinite Scroll load, as well.
	$( document ).on( 'post-load', function() {
		countGrid();
		blockWidth();
	});

	$( window ).resize( function() {
		blockWidth();
	});

} )(jQuery);
;