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/** |
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* WPBC calendar loader bootstrap. |
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* ============================================================================================== |
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* - Finds every .calendar_loader_frame[data-wpbc-rid] on the page (now or later). |
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* - For each loader element, waits a "grace" period (data-wpbc-grace, default 8000 ms): |
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* - If the real calendar appears: do nothing (loader naturally replaced). |
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* - If not: show a helpful message (missing jQuery/_wpbc/datepick) or a duplicate notice. |
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* - Works with multiple calendars and even duplicate RIDs on the same page. |
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* - No inline JS needed in the shortcode/template output. |
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* |
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* File: ../includes/__js/client/cal/wpbc_cal_loader.js |
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* |
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* @since 10.14.5 |
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* @modified 2025-09-07 12:21 |
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* @version 1.0.0 |
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* |
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*/ |
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/** |
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* WPBC calendar loader bootstrap. |
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* - Auto-detects .calendar_loader_frame[data-wpbc-rid] blocks. |
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* - Waits a "grace" period per element before showing a helpful message |
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* if the real calendar hasn't replaced the loader. |
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* - Multiple calendars and duplicate RIDs are handled. |
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*/ |
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(function (w, d) { |
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'use strict'; |
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|
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/* --------------------------------------------------------------------------- |
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* Small utilities (snake_case) |
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* ------------------------------------------------------------------------ */ |
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|
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/** Track processed loader elements; fallback to data flag if WeakSet missing. */ |
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var processed_set = typeof WeakSet === 'function' ? new WeakSet() : null; |
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|
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/** Return first match inside optional root. */ |
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function query_one(selector, root) { |
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return (root || d).querySelector( selector ); |
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} |
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|
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/** Return NodeList of matches inside optional root. */ |
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function query_all(selector, root) { |
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return (root || d).querySelectorAll( selector ); |
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} |
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|
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/** Run a callback when DOM is ready. */ |
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function on_ready(fn) { |
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if ( d.readyState === 'loading' ) { |
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d.addEventListener( 'DOMContentLoaded', fn ); |
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} else { |
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fn(); |
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} |
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} |
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|
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/** Clear interval safely. */ |
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function safe_clear(interval_id) { |
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try { |
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w.clearInterval( interval_id ); |
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} catch ( e ) { |
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} |
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} |
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|
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/** Mark element processed (WeakSet or data attribute). */ |
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function mark_processed(el) { |
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if ( processed_set ) { |
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processed_set.add( el ); |
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} else { |
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try { |
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el.dataset.wpbcProcessed = '1'; |
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} catch ( e ) { |
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} |
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} |
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} |
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|
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/** Check if element was processed. */ |
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function is_processed(el) { |
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return processed_set ? processed_set.has( el ) : (el && el.dataset && el.dataset.wpbcProcessed === '1'); |
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} |
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|
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/* --------------------------------------------------------------------------- |
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* Messages |
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* ------------------------------------------------------------------------ */ |
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|
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/** |
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* Build visitor messages for a resource, using localized Form Messages when available. |
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* @param {string|number} rid |
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* @return {{duplicate:string,init_failed:string,support:string,lib_jq:string,lib_dp:string,lib_wpbc:string}} |
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*/ |
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function get_messages(rid) { |
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var rid_int = parseInt( rid, 10 ); |
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var duplicate_message = |
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'More than one calendar or booking form for Booking Resource ID {resource_id} is present on this page. ' + |
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'A hidden copy still conflicts with the visible form and can prevent booking submission. ' + |
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'The site administrator must keep only one calendar or form for this Booking Resource. ' + |
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'After the page is corrected, reload it and try again.'; |
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|
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if ( w._wpbc && typeof w._wpbc.get_message === 'function' ) { |
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duplicate_message = w._wpbc.get_message( 'message_duplicate_booking_resource_on_page' ) || duplicate_message; |
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} |
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duplicate_message = String( duplicate_message ).replace( /\{resource_id\}/g, String( rid_int ) ); |
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|
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return { |
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duplicate : duplicate_message, |
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init_failed: |
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'The calendar could not be initialized on this page.' + '\n' + |
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'Please check your browser console for JavaScript errors and conflicts with other scripts/plugins.', |
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support : '', /* 'Contact [email protected] if you have any questions.', */ |
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lib_jq : |
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'It appears that the "jQuery" library is not loading correctly.' + '\n' + |
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'For more information, please refer to this page: https://wpbookingcalendar.com/faq/', |
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lib_dp : |
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'It appears that the "jQuery.datepick" library is not loading correctly.' + '\n' + |
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'For more information, please refer to this page: https://wpbookingcalendar.com/faq/', |
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lib_wpbc : |
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'It appears that the "_wpbc" library is not loading correctly.' + '\n' + |
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'Please enable the loading of JS/CSS files for this page on the "WP Booking Calendar" - "Settings General" - "Advanced" page' + '\n' + |
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'For more information, please refer to this page: https://wpbookingcalendar.com/faq/' |
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}; |
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} |
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|
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/** |
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* Escape a plain-text loader message before inserting its wrapper markup. |
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* |
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* @param {string} plain_text Visitor-facing plain text. |
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* @return {string} HTML-safe text. |
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*/ |
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function escape_html(plain_text) { |
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return String( plain_text || '' ) |
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.replace( /&/g, '&' ) |
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.replace( /</g, '<' ) |
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.replace( />/g, '>' ) |
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.replace( /"/g, '"' ) |
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.replace( /'/g, ''' ); |
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} |
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|
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/** |
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* Wrap plain text (with newlines) in a small HTML container. |
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* @param {string} msg |
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* @return {string} |
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*/ |
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function wrap_html(msg) { |
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return '<div style="font-size:13px;margin:10px;">' + escape_html( msg ).replace( /\n/g, '<br>' ) + '</div>'; |
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} |
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|
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/** Library presence checks (fast & cheap). */ |
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function has_jq() { |
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return !!(w.jQuery && jQuery.fn && typeof jQuery.fn.on === 'function'); |
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} |
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|
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function has_dp() { |
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return !!(w.jQuery && jQuery.datepick); |
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} |
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|
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function has_wpbc() { |
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return !!(w._wpbc && typeof w._wpbc.set_other_param === 'function'); |
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} |
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|
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function normalize_rid(rid) { |
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var n = parseInt( rid, 10 ); |
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return (n > 0) ? String( n ) : ''; |
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} |
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|
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function get_rid_counts(rid) { |
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var r = normalize_rid( rid ); |
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return { |
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rid : r, |
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loaders : r ? query_all( '.calendar_loader_frame[data-wpbc-rid="' + r + '"]' ).length : 0, |
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containers: r ? query_all( '#calendar_booking' + r ).length : 0 |
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}; |
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} |
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|
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function is_duplicate_rid(rid) { |
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var c = get_rid_counts( rid ); |
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return (c.loaders > 1) || (c.containers > 1); |
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} |
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|
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/** |
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* Determine if the loader has been replaced by the real calendar. |
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* |
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* @param {Element} el Loader element |
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* @param {string} rid Resource ID |
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* @param {Element|null} container Optional #calendar_booking{rid} element |
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* @return {boolean} |
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*/ |
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function is_replaced(el, rid, container) { |
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var loader_still_in_dom = d.body.contains( el ); |
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var calendar_exists = !!query_one( '.wpbc_calendar_id_' + rid, container || d ); |
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return (!loader_still_in_dom) || calendar_exists; |
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} |
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|
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/** |
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* Start watcher for a single loader element. |
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* - Polls and observes the calendar container. |
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* - After grace, injects a suitable message if not replaced. |
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* |
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* @param {Element} el |
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*/ |
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function start_for(el) { |
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if ( ! el || is_processed( el ) ) { |
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return; |
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} |
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mark_processed( el ); |
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|
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var rid = el.dataset.wpbcRid; |
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if ( ! rid ) { |
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return; |
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} |
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|
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var grace_ms = parseInt( el.dataset.wpbcGrace || '8000', 10 ); |
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if ( ! (grace_ms > 0) ) { |
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grace_ms = 8000; |
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} |
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|
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var container_id = 'calendar_booking' + rid; |
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var container = d.getElementById( container_id ); |
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var text_el = query_one( '.calendar_loader_text', el ); |
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|
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function replaced_now() { |
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return is_replaced( el, rid, container ); |
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} |
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|
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// Already replaced -> nothing to do. |
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if ( replaced_now() ) { |
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return; |
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} |
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|
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// 1) Cheap polling. |
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var poll_id = w.setInterval( function () { |
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if ( replaced_now() ) { |
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safe_clear( poll_id ); |
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if ( observer ) { |
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try { |
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observer.disconnect(); |
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} catch ( e ) { |
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} |
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} |
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} |
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}, 250 ); |
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|
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// 2) MutationObserver for faster reaction. |
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var observer = null; |
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if ( container && 'MutationObserver' in w ) { |
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try { |
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observer = new MutationObserver( function () { |
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if ( replaced_now() ) { |
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safe_clear( poll_id ); |
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try { |
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observer.disconnect(); |
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} catch ( e ) { |
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} |
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} |
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} ); |
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observer.observe( container, { childList: true, subtree: true } ); |
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} catch ( e ) { |
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} |
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} |
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|
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// 3) Final decision after grace period. |
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w.setTimeout( function finalize_after_grace() { |
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if ( replaced_now() ) { |
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safe_clear( poll_id ); |
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if ( observer ) { |
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try { |
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observer.disconnect(); |
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} catch ( e ) { |
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} |
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} |
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return; |
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} |
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|
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var M = get_messages( rid ); |
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var msg; |
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if ( ! has_jq() ) { |
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msg = M.lib_jq; |
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} else if ( ! has_wpbc() ) { |
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msg = M.lib_wpbc; |
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} else if ( ! has_dp() ) { |
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msg = M.lib_dp; |
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} else { |
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// Libraries are present, but loader wasn't replaced -> decide what is most likely. |
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if ( is_duplicate_rid( rid ) ) { |
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msg = M.duplicate + '\n\n' + M.support; |
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} else { |
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msg = M.init_failed + '\n\n' + M.support; |
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} |
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} |
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|
| 287 |
try { |
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if ( text_el ) { |
| 289 |
text_el.innerHTML = wrap_html( msg ); |
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} |
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} catch ( e ) { |
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} |
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|
| 294 |
safe_clear( poll_id ); |
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if ( observer ) { |
| 296 |
try { |
| 297 |
observer.disconnect(); |
| 298 |
} catch ( e ) { |
| 299 |
} |
| 300 |
} |
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}, grace_ms ); |
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} |
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|
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/** |
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* Initialize watchers for loader elements already in the DOM. |
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*/ |
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function bootstrap_existing() { |
| 308 |
query_all( '.calendar_loader_frame[data-wpbc-rid]' ).forEach( start_for ); |
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} |
| 310 |
|
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/** |
| 312 |
* Observe the document for any new loader elements inserted later (AJAX, block render). |
| 313 |
*/ |
| 314 |
function observe_new_loaders() { |
| 315 |
if ( ! ('MutationObserver' in w) ) { |
| 316 |
return; |
| 317 |
} |
| 318 |
try { |
| 319 |
var doc_observer = new MutationObserver( function (mutations) { |
| 320 |
for ( var i = 0; i < mutations.length; i++ ) { |
| 321 |
var nodes = mutations[i].addedNodes || []; |
| 322 |
for ( var j = 0; j < nodes.length; j++ ) { |
| 323 |
var node = nodes[j]; |
| 324 |
if ( ! node || node.nodeType !== 1 ) { |
| 325 |
continue; |
| 326 |
} |
| 327 |
if ( node.matches && node.matches( '.calendar_loader_frame[data-wpbc-rid]' ) ) { |
| 328 |
start_for( node ); |
| 329 |
} |
| 330 |
if ( node.querySelectorAll ) { |
| 331 |
var inner = node.querySelectorAll( '.calendar_loader_frame[data-wpbc-rid]' ); |
| 332 |
if ( inner && inner.length ) { |
| 333 |
inner.forEach( start_for ); |
| 334 |
} |
| 335 |
} |
| 336 |
} |
| 337 |
} |
| 338 |
} ); |
| 339 |
doc_observer.observe( d.documentElement, { childList: true, subtree: true } ); |
| 340 |
} catch ( e ) { |
| 341 |
} |
| 342 |
} |
| 343 |
|
| 344 |
/* --------------------------------------------------------------------------- |
| 345 |
* Boot |
| 346 |
* ------------------------------------------------------------------------ */ |
| 347 |
on_ready( function () { |
| 348 |
bootstrap_existing(); |
| 349 |
observe_new_loaders(); |
| 350 |
} ); |
| 351 |
|
| 352 |
})( window, document ); |
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|
