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WME Utils - Google Link Enhancer

Adds some extra WME functionality related to Google place links.

当前为 2023-05-22 提交的版本，查看 最新版本。

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/39208/1194188/WME%20Utils%20-%20Google%20Link%20Enhancer.js 

  1. // ==UserScript==
  2. // @name         WME Utils - Google Link Enhancer
  3. // @namespace    WazeDev
  4. // @version      2023.05.22.001
  5. // @description  Adds some extra WME functionality related to Google place links.
  6. // @author       MapOMatic, WazeDev group
  7. // @include      /^https:\/\/(www|beta)\.waze\.com\/(?!user\/)(.{2,6}\/)?editor\/?.*$/
  8. // @license      GNU GPLv3
  9. // ==/UserScript==
  10.  
  11. /* global OpenLayers */
  12. /* global W */
  13. /* global google */
  14.  
  15. // /* eslint-disable */
  16. /* eslint-disable no-unused-vars */
  17. class GoogleLinkEnhancer {
  18.     #DISABLE_CLOSED_PLACES = false; // Set to TRUE if the feature needs to be temporarily disabled, e.g. during the COVID-19 pandemic.
  19.     #EXT_PROV_ELEM_QUERY = 'wz-list-item.external-provider';
  20.     #EXT_PROV_ELEM_EDIT_QUERY = 'wz-list-item.external-provider-edit';
  21.     #EXT_PROV_ELEM_CONTENT_QUERY = 'div.external-provider-content';
  22.     #LINK_CACHE_NAME = 'gle_link_cache';
  23.     #LINK_CACHE_CLEAN_INTERVAL_MIN = 1; // Interval to remove old links and save new ones.
  24.     #LINK_CACHE_LIFESPAN_HR = 6; // Remove old links when they exceed this time limit.
  25.  
  26.     #linkCache;
  27.     #enabled = false;
  28.     #disableApiUntil = null; // When a serious API error occurs (OVER_QUERY_LIMIT, REQUEST_DENIED), set this to a time in the future.
  29.     #mapLayer = null;
  30.     #distanceLimit = 400; // Default distance (meters) when Waze place is flagged for being too far from Google place.
  31.     // Area place is calculated as #distanceLimit + <distance between centroid and furthest node>
  32.     #showTempClosedPOIs = true;
  33.     #placesService;
  34.     #linkObserver;
  35.     #modeObserver;
  36.     #searchResultsObserver;
  37.     #lzString;
  38.     #cacheCleanIntervalID;
  39.     #originalHeadAppendChildMethod;
  40.     #ptFeature;
  41.     #lineFeature;
  42.     #timeoutID;
  43.     strings = {
  44.         permClosedPlace: 'Google indicates this place is permanently closed.\nVerify with other sources or your editor community before deleting.',
  45.         tempClosedPlace: 'Google indicates this place is temporarily closed.',
  46.         multiLinked: 'Linked more than once already. Please find and remove multiple links.',
  47.         linkedToThisPlace: 'Already linked to this place',
  48.         linkedNearby: 'Already linked to a nearby place',
  49.         linkedToXPlaces: 'This is linked to {0} places',
  50.         badLink: 'Invalid Google link. Please remove it.',
  51.         tooFar: 'The Google linked place is more than {0} meters from the Waze place.  Please verify the link is correct.'
  52.     };
  53.  
  54.     /* eslint-enable no-unused-vars */
  55.     constructor() {
  56.         const attributionElem = document.createElement('div');
  57.         this.#placesService = new google.maps.places.PlacesService(attributionElem);
  58.         this.#initLZString();
  59.         const STORED_CACHE = localStorage.getItem(this.#LINK_CACHE_NAME);
  60.         try {
  61.             this.#linkCache = STORED_CACHE ? $.parseJSON(this.#lzString.decompressFromUTF16(STORED_CACHE)) : {};
  62.         } catch (ex) {
  63.             if (ex.name === 'SyntaxError') {
  64.                 // In case the cache is corrupted and can't be read.
  65.                 this.#linkCache = {};
  66.                 console.warn('GoogleLinkEnhancer:', 'An error occurred while loading the stored cache. A new cache was created.');
  67.             } else {
  68.                 throw ex;
  69.             }
  70.         }
  71.         if (this.#linkCache === null || this.#linkCache.length === 0) this.#linkCache = {};
  72.  
  73.         this.#initLayer();
  74.  
  75.         // NOTE: Arrow functions are necessary for calling methods on object instances.
  76.         // This could be made more efficient by only processing the relevant places.
  77.         W.model.events.register('mergeend', null, () => { this.#processPlaces(); });
  78.         W.model.venues.on('objectschanged', () => { this.#processPlaces(); });
  79.         W.model.venues.on('objectsremoved', () => { this.#processPlaces(); });
  80.         W.model.venues.on('objectsadded', () => { this.#processPlaces(); });
  81.  
  82.         // Watch for ext provider elements being added to the DOM, and add hover events.
  83.         this.#linkObserver = new MutationObserver(mutations => {
  84.             mutations.forEach(mutation => {
  85.                 for (let idx = 0; idx < mutation.addedNodes.length; idx++) {
  86.                     const nd = mutation.addedNodes[idx];
  87.                     if (nd.nodeType === Node.ELEMENT_NODE) {
  88.                         const $el = $(nd);
  89.                         const $subel = $el.find(this.#EXT_PROV_ELEM_QUERY);
  90.                         if ($el.is(this.#EXT_PROV_ELEM_QUERY)) {
  91.                             this.#addHoverEvent($el);
  92.                             this.#formatLinkElements();
  93.                         } else if ($subel.length) {
  94.                             for (let i = 0; i < $subel.length; i++) {
  95.                                 this.#addHoverEvent($($subel[i]));
  96.                             }
  97.                             this.#formatLinkElements();
  98.                         }
  99.                         if ($el.is(this.#EXT_PROV_ELEM_EDIT_QUERY)) {
  100.                             this.#searchResultsObserver.observe($el.find('wz-autocomplete[placeholder="Search for a place"]')[0].shadowRoot, { childList: true, subtree: true });
  101.                         }
  102.                     }
  103.                 }
  104.                 for (let idx = 0; idx < mutation.removedNodes.length; idx++) {
  105.                     const nd = mutation.removedNodes[idx];
  106.                     if (nd.nodeType === Node.ELEMENT_NODE) {
  107.                         const $el = $(nd);
  108.                         if ($el.is(this.#EXT_PROV_ELEM_EDIT_QUERY)) {
  109.                             this.#searchResultsObserver.disconnect();
  110.                         }
  111.                     }
  112.                 }
  113.             });
  114.         });
  115.  
  116.         // Watch for Google place search result list items being added to the DOM
  117.         const that = this;
  118.         this.#searchResultsObserver = new MutationObserver(mutations => {
  119.             mutations.forEach(mutation => {
  120.                 for (let idx = 0; idx < mutation.addedNodes.length; idx++) {
  121.                     const nd = mutation.addedNodes[idx];
  122.                     if (nd.nodeType === Node.ELEMENT_NODE && $(nd).is('wz-menu-item.simple-item')) {
  123.                         $(nd).mouseenter(() => {
  124.                             // When mousing over a list item, find the Google place ID from the list that was stored previously.
  125.                             // Then add the point/line to the map.
  126.                             that.#addPoint($(nd).attr('item-id'));
  127.                         }).mouseleave(() => {
  128.                             // When leaving the list item, remove the point.
  129.                             that.#destroyPoint();
  130.                         });
  131.                     }
  132.                 }
  133.             });
  134.         });
  135.  
  136.         // Watch the side panel for addition of the sidebar-layout div, which indicates a mode change.
  137.         this.#modeObserver = new MutationObserver(mutations => {
  138.             mutations.forEach(mutation => {
  139.                 for (let idx = 0; idx < mutation.addedNodes.length; idx++) {
  140.                     const nd = mutation.addedNodes[idx];
  141.                     if (nd.nodeType === Node.ELEMENT_NODE && $(nd).is('.sidebar-layout')) {
  142.                         this.#observeLinks();
  143.                         break;
  144.                     }
  145.                 }
  146.             });
  147.         });
  148.  
  149.         // This is a special event that will be triggered when DOM elements are destroyed.
  150.         /* eslint-disable wrap-iife, func-names, object-shorthand */
  151.         (function($) {
  152.             $.event.special.destroyed = {
  153.                 remove: function(o) {
  154.                     if (o.handler && o.type !== 'destroyed') {
  155.                         o.handler();
  156.                     }
  157.                 }
  158.             };
  159.         })(jQuery);
  160.         /* eslint-enable wrap-iife, func-names, object-shorthand */
  161.  
  162.         // In case a place is already selected on load.
  163.         const selFeatures = W.selectionManager.getSelectedFeatures();
  164.         if (selFeatures.length && selFeatures[0].attributes.repositoryObject.type === 'venue') {
  165.             this.#formatLinkElements();
  166.         }
  167.     }
  168.  
  169.     #initLayer() {
  170.         this.#mapLayer = new OpenLayers.Layer.Vector('Google Link Enhancements.', {
  171.             uniqueName: '___GoogleLinkEnhancements',
  172.             displayInLayerSwitcher: true,
  173.             styleMap: new OpenLayers.StyleMap({
  174.                 default: {
  175.                     strokeColor: '${strokeColor}',
  176.                     strokeWidth: '${strokeWidth}',
  177.                     strokeDashstyle: '${strokeDashstyle}',
  178.                     pointRadius: '15',
  179.                     fillOpacity: '0'
  180.                 }
  181.             })
  182.         });
  183.  
  184.         this.#mapLayer.setOpacity(0.8);
  185.         W.map.addLayer(this.#mapLayer);
  186.     }
  187.  
  188.     enable() {
  189.         if (!this.#enabled) {
  190.             this.#modeObserver.observe($('.edit-area #sidebarContent')[0], { childList: true, subtree: false });
  191.             this.#observeLinks();
  192.             // Watch for JSONP callbacks. JSONP is used for the autocomplete results when searching for Google links.
  193.             this.#addJsonpInterceptor();
  194.             // Note: Using on() allows passing "this" as a variable, so it can be used in the handler function.
  195.             $('#map').on('mouseenter', null, this, GoogleLinkEnhancer.#onMapMouseenter);
  196.             $(window).on('unload', null, this, GoogleLinkEnhancer.#onWindowUnload);
  197.             W.model.venues.on('objectschanged', this.#formatLinkElements, this);
  198.             this.#processPlaces();
  199.             this.#cleanAndSaveLinkCache();
  200.             this.#cacheCleanIntervalID = setInterval(() => this.#cleanAndSaveLinkCache(), 1000 * 60 * this.#LINK_CACHE_CLEAN_INTERVAL_MIN);
  201.             this.#enabled = true;
  202.         }
  203.     }
  204.  
  205.     disable() {
  206.         if (this.#enabled) {
  207.             this.#modeObserver.disconnect();
  208.             this.#linkObserver.disconnect();
  209.             this.#searchResultsObserver.disconnect();
  210.             this.#removeJsonpInterceptor();
  211.             $('#map').off('mouseenter', GoogleLinkEnhancer.#onMapMouseenter);
  212.             $(window).off('unload', null, this, GoogleLinkEnhancer.#onWindowUnload);
  213.             W.model.venues.off('objectschanged', this.#formatLinkElements, this);
  214.             if (this.#cacheCleanIntervalID) clearInterval(this.#cacheCleanIntervalID);
  215.             this.#cleanAndSaveLinkCache();
  216.             this.#enabled = false;
  217.         }
  218.     }
  219.  
  220.     // The distance (in meters) before flagging a Waze place that is too far from the linked Google place.
  221.     // Area places use distanceLimit, plus the distance from the centroid of the AP to its furthest node.
  222.     get distanceLimit() {
  223.         return this.#distanceLimit;
  224.     }
  225.  
  226.     set distanceLimit(value) {
  227.         this.#distanceLimit = value;
  228.         this.#processPlaces();
  229.     }
  230.  
  231.     get showTempClosedPOIs() {
  232.         return this.#showTempClosedPOIs;
  233.     }
  234.  
  235.     set showTempClosedPOIs(value) {
  236.         this.#showTempClosedPOIs = value;
  237.         this.#processPlaces();
  238.     }
  239.  
  240.     static #onWindowUnload(evt) {
  241.         evt.data.#cleanAndSaveLinkCache();
  242.     }
  243.  
  244.     #cleanAndSaveLinkCache() {
  245.         if (!this.#linkCache) return;
  246.         const now = new Date();
  247.         Object.keys(this.#linkCache).forEach(id => {
  248.             const link = this.#linkCache[id];
  249.             // Bug fix:
  250.             if (link.location) {
  251.                 link.loc = link.location;
  252.                 delete link.location;
  253.             }
  254.             // Delete link if older than X hours.
  255.             if (!link.ts || (now - new Date(link.ts)) > this.#LINK_CACHE_LIFESPAN_HR * 3600 * 1000) {
  256.                 delete this.#linkCache[id];
  257.             }
  258.         });
  259.         localStorage.setItem(this.#LINK_CACHE_NAME, this.#lzString.compressToUTF16(JSON.stringify(this.#linkCache)));
  260.         // console.log('link cache count: ' + Object.keys(this.#linkCache).length, this.#linkCache);
  261.     }
  262.  
  263.     // Borrowed from WazeWrap
  264.     static #distanceBetweenPoints(point1, point2) {
  265.         const line = new OpenLayers.Geometry.LineString([point1, point2]);
  266.         const length = line.getGeodesicLength(W.map.getProjectionObject());
  267.         return length; // multiply by 3.28084 to convert to feet
  268.     }
  269.  
  270.     #isLinkTooFar(link, venue) {
  271.         if (link.loc) {
  272.             const linkPt = new OpenLayers.Geometry.Point(link.loc.lng, link.loc.lat);
  273.             linkPt.transform(W.Config.map.projection.remote, W.map.getProjectionObject());
  274.             let venuePt;
  275.             let distanceLim = this.distanceLimit;
  276.             if (venue.isPoint()) {
  277.                 venuePt = venue.geometry.getCentroid();
  278.             } else {
  279.                 const bounds = venue.geometry.getBounds();
  280.                 const center = bounds.getCenterLonLat();
  281.                 venuePt = new OpenLayers.Geometry.Point(center.lon, center.lat);
  282.                 const topRightPt = new OpenLayers.Geometry.Point(bounds.right, bounds.top);
  283.                 distanceLim += GoogleLinkEnhancer.#distanceBetweenPoints(venuePt, topRightPt);
  284.             }
  285.             const distance = GoogleLinkEnhancer.#distanceBetweenPoints(linkPt, venuePt);
  286.             return distance > distanceLim;
  287.         }
  288.         return false;
  289.     }
  290.  
  291.     #processPlaces() {
  292.         return; // Disabled until we can find a fix.
  293.         try {
  294.             if (this.#enabled) {
  295.                 const that = this;
  296.                 // Get a list of already-linked id's
  297.                 const existingLinks = GoogleLinkEnhancer.#getExistingLinks();
  298.                 this.#mapLayer.removeAllFeatures();
  299.                 const drawnLinks = [];
  300.                 W.model.venues.getObjectArray().forEach(venue => {
  301.                     const promises = [];
  302.                     venue.attributes.externalProviderIDs.forEach(provID => {
  303.                         const id = provID.attributes.uuid;
  304.  
  305.                         // Check for duplicate links
  306.                         const linkInfo = existingLinks[id];
  307.                         if (linkInfo.count > 1) {
  308.                             const geometry = venue.isPoint() ? venue.geometry.getCentroid() : venue.geometry.clone();
  309.                             const width = venue.isPoint() ? '4' : '12';
  310.                             const color = '#fb8d00';
  311.                             const features = [new OpenLayers.Feature.Vector(geometry, {
  312.                                 strokeWidth: width, strokeColor: color
  313.                             })];
  314.                             const lineStart = geometry.getCentroid();
  315.                             linkInfo.venues.forEach(linkVenue => {
  316.                                 if (linkVenue !== venue
  317.                                     && !drawnLinks.some(dl => (dl[0] === venue && dl[1] === linkVenue) || (dl[0] === linkVenue && dl[1] === venue))) {
  318.                                     features.push(
  319.                                         new OpenLayers.Feature.Vector(
  320.                                             new OpenLayers.Geometry.LineString([lineStart, linkVenue.geometry.getCentroid()]),
  321.                                             {
  322.                                                 strokeWidth: 4,
  323.                                                 strokeColor: color,
  324.                                                 strokeDashstyle: '12 12'
  325.                                             }
  326.                                         )
  327.                                     );
  328.                                     drawnLinks.push([venue, linkVenue]);
  329.                                 }
  330.                             });
  331.                             that.#mapLayer.addFeatures(features);
  332.                         }
  333.  
  334.                         // Get Google link info, and store results for processing.
  335.                         promises.push(that.#getLinkInfoAsync(id));
  336.                     });
  337.  
  338.                     // Process all results of link lookups and add a highlight feature if needed.
  339.                     Promise.all(promises).then(results => {
  340.                         let strokeColor = null;
  341.                         let strokeDashStyle = 'solid';
  342.                         if (!that.#DISABLE_CLOSED_PLACES && results.some(res => res.permclosed)) {
  343.                             if (/^(\[|\()?(permanently )?closed(\]|\)| -)/i.test(venue.attributes.name)
  344.                                 || /(\(|- |\[)(permanently )?closed(\)|\])?$/i.test(venue.attributes.name)) {
  345.                                 strokeDashStyle = venue.isPoint() ? '2 6' : '2 16';
  346.                             }
  347.                             strokeColor = '#F00';
  348.                         } else if (results.some(res => that.#isLinkTooFar(res, venue))) {
  349.                             strokeColor = '#0FF';
  350.                         } else if (!that.#DISABLE_CLOSED_PLACES && that.#showTempClosedPOIs && results.some(res => res.tempclosed)) {
  351.                             if (/^(\[|\()?(temporarily )?closed(\]|\)| -)/i.test(venue.attributes.name)
  352.                                 || /(\(|- |\[)(temporarily )?closed(\)|\])?$/i.test(venue.attributes.name)) {
  353.                                 strokeDashStyle = venue.isPoint() ? '2 6' : '2 16';
  354.                             }
  355.                             strokeColor = '#FD3';
  356.                         } else if (results.some(res => res.notFound)) {
  357.                             strokeColor = '#F0F';
  358.                         }
  359.                         if (strokeColor) {
  360.                             const style = {
  361.                                 strokeWidth: venue.isPoint() ? '4' : '12',
  362.                                 strokeColor,
  363.                                 strokeDashStyle
  364.                             };
  365.                             const geometry = venue.isPoint() ? venue.geometry.getCentroid() : venue.geometry.clone();
  366.                             that.#mapLayer.addFeatures([new OpenLayers.Feature.Vector(geometry, style)]);
  367.                         }
  368.                     });
  369.                 });
  370.             }
  371.         } catch (ex) {
  372.             console.error('PIE (Google Link Enhancer) error:', ex);
  373.         }
  374.     }
  375.  
  376.     #cacheLink(id, link) {
  377.         link.ts = new Date();
  378.         this.#linkCache[id] = link;
  379.         // console.log('link cache count: ' + Object.keys(this.#linkCache).length, this.#linkCache);
  380.     }
  381.  
  382.     #getLinkInfoAsync(placeId) {
  383.         return new Promise(resolve => {
  384.             let link = this.#linkCache[placeId];
  385.             if (!link) {
  386.                 const request = {
  387.                     placeId,
  388.                     fields: ['geometry', 'business_status']
  389.                 };
  390.                 this.#placesService.getDetails(request, (place, requestStatus) => {
  391.                     link = {};
  392.                     if (requestStatus === google.maps.places.PlacesServiceStatus.OK) {
  393.                         const loc = place.geometry.location;
  394.                         link.loc = { lng: loc.lng(), lat: loc.lat() };
  395.                         if (place.business_status === 'CLOSED_PERMANENTLY') {
  396.                             link.permclosed = true;
  397.                         } else if (place.business_status === 'CLOSED_TEMPORARILY') {
  398.                             link.tempclosed = true;
  399.                         }
  400.                         this.#cacheLink(placeId, link);
  401.                     } else if (requestStatus === google.maps.places.PlacesServiceStatus.NOT_FOUND) {
  402.                         link.notfound = true;
  403.                         this.#cacheLink(placeId, link);
  404.                     } else if (this.#disableApiUntil) {
  405.                         link.apiDisabled = true;
  406.                     } else {
  407.                         link.error = requestStatus;
  408.                         // res.errorMessage = json.error_message;
  409.                         this.#disableApiUntil = Date.now() + 10 * 1000; // Disable api calls for 10 seconds.
  410.                         console.error(`${GM_info.script.name}, Google Link Enhancer disabled for 10 seconds due to API error.`, link);
  411.                     }
  412.                     resolve(link);
  413.                 });
  414.             } else {
  415.                 resolve(link);
  416.             }
  417.         });
  418.     }
  419.  
  420.     // _getLinkInfoAsync(id) {
  421.     //     const link = this.#linkCache[id];
  422.     //     if (link) {
  423.     //         return Promise.resolve(link);
  424.     //     }
  425.     //     if (this.#disableApiUntil) {
  426.     //         if (Date.now() < this.#disableApiUntil) {
  427.     //             return Promise.resolve({ apiDisabled: true });
  428.     //         }
  429.     //         this.#disableApiUntil = null;
  430.     //     }
  431.     //     return new Promise(resolve => {
  432.  
  433.     //         let fullUrl = this._urlBase;
  434.     //         if (id.startsWith('q=') || id.startsWith('cid=')) {
  435.     //             fullUrl += id;
  436.     //         } else {
  437.     //             fullUrl += `place_id=${id}`;
  438.     //         }
  439.     //         $.getJSON(fullUrl).then(json => {
  440.     //             const res = {};
  441.     //             if (json.status === 'OK') {
  442.     //                 res.loc = json.result.geometry.location;
  443.     //                 if (json.result.business_status === 'CLOSED_PERMANENTLY') {
  444.     //                     res.permclosed = true;
  445.     //                 } else if (json.result.business_status === 'CLOSED_TEMPORARILY') {
  446.     //                     res.tempclosed = true;
  447.     //                 }
  448.     //                 this._cacheLink(id, res);
  449.     //             } else if (json.status === 'NOT_FOUND') {
  450.     //                 res.notfound = true;
  451.     //                 this._cacheLink(id, res);
  452.     //             } else if (this.#disableApiUntil) {
  453.     //                 res.apiDisabled = true;
  454.     //             } else {
  455.     //                 res.error = json.status;
  456.     //                 res.errorMessage = json.error_message;
  457.     //                 this.#disableApiUntil = Date.now() + 10 * 1000; // Disable api calls for 10 seconds.
  458.     //                 console.error(`${GM_info.script.name}, Google Link Enhancer disabled for 10 seconds due to API error.`, res);
  459.     //             }
  460.     //             resolve(res);
  461.     //         });
  462.     //     });
  463.     // }
  464.  
  465.     static #onMapMouseenter(event) {
  466.         // If the point isn't destroyed yet, destroy it when mousing over the map.
  467.         event.data.#destroyPoint();
  468.     }
  469.  
  470.     async #formatLinkElements(callCount = 0) {
  471.         const $links = $('#edit-panel').find(this.#EXT_PROV_ELEM_QUERY);
  472.         const selFeatures = W.selectionManager.getSelectedFeatures();
  473.         if (!$links.length) {
  474.             // If links aren't available, continue calling this function for up to 3 seconds unless place has been deselected.
  475.             if (callCount < 30 && selFeatures.length && selFeatures[0].attributes.repositoryObject.type === 'venue') {
  476.                 setTimeout(() => this.#formatLinkElements(++callCount), 100);
  477.             }
  478.         } else {
  479.             const existingLinks = GoogleLinkEnhancer.#getExistingLinks();
  480.  
  481.             // fetch all links first
  482.             const promises = [];
  483.             const extProvElements = [];
  484.             $links.each((ix, linkEl) => {
  485.                 const $linkEl = $(linkEl);
  486.                 extProvElements.push($linkEl);
  487.  
  488.                 const id = GoogleLinkEnhancer.#getIdFromElement($linkEl);
  489.                 if (!id) return;
  490.  
  491.                 promises.push(this.#getLinkInfoAsync(id));
  492.             });
  493.             await Promise.all(promises);
  494.  
  495.             extProvElements.forEach($extProvElem => {
  496.                 const id = GoogleLinkEnhancer.#getIdFromElement($extProvElem);
  497.  
  498.                 if (!id) return;
  499.  
  500.                 const link = this.#linkCache[id];
  501.                 if (existingLinks[id] && existingLinks[id].count > 1 && existingLinks[id].isThisVenue) {
  502.                     setTimeout(() => {
  503.                         $extProvElem.find(this.#EXT_PROV_ELEM_CONTENT_QUERY).css({ backgroundColor: '#FFA500' }).attr({
  504.                             title: this.strings.linkedToXPlaces.replace('{0}', existingLinks[id].count)
  505.                         });
  506.                     }, 50);
  507.                 }
  508.                 this.#addHoverEvent($extProvElem);
  509.                 if (link) {
  510.                     if (link.permclosed && !this.#DISABLE_CLOSED_PLACES) {
  511.                         $extProvElem.find(this.#EXT_PROV_ELEM_CONTENT_QUERY).css({ backgroundColor: '#FAA' }).attr('title', this.strings.permClosedPlace);
  512.                     } else if (link.tempclosed && !this.#DISABLE_CLOSED_PLACES) {
  513.                         $extProvElem.find(this.#EXT_PROV_ELEM_CONTENT_QUERY).css({ backgroundColor: '#FFA' }).attr('title', this.strings.tempClosedPlace);
  514.                     } else if (link.notFound) {
  515.                         $extProvElem.find(this.#EXT_PROV_ELEM_CONTENT_QUERY).css({ backgroundColor: '#F0F' }).attr('title', this.strings.badLink);
  516.                     } else {
  517.                         const venue = W.selectionManager.getSelectedFeatures()[0].attributes.repositoryObject;
  518.                         if (this.#isLinkTooFar(link, venue)) {
  519.                             $extProvElem.find(this.#EXT_PROV_ELEM_CONTENT_QUERY).css({ backgroundColor: '#0FF' }).attr('title', this.strings.tooFar.replace('{0}', this.distanceLimit));
  520.                         } else { // reset in case we just deleted another provider
  521.                             $extProvElem.find(this.#EXT_PROV_ELEM_CONTENT_QUERY).css({ backgroundColor: '' }).attr('title', '');
  522.                         }
  523.                     }
  524.                 }
  525.             });
  526.         }
  527.     }
  528.  
  529.     static #getExistingLinks() {
  530.         const existingLinks = {};
  531.         let thisVenue;
  532.         if (W.selectionManager.getSelectedFeatures().length) {
  533.             thisVenue = W.selectionManager.getSelectedFeatures()[0].attributes.repositoryObject;
  534.         }
  535.         W.model.venues.getObjectArray().forEach(venue => {
  536.             const isThisVenue = venue === thisVenue;
  537.             const thisPlaceIDs = [];
  538.             venue.attributes.externalProviderIDs.forEach(provID => {
  539.                 const id = provID.attributes.uuid;
  540.                 if (thisPlaceIDs.indexOf(id) === -1) {
  541.                     thisPlaceIDs.push(id);
  542.                     let link = existingLinks[id];
  543.                     if (link) {
  544.                         link.count++;
  545.                         link.venues.push(venue);
  546.                     } else {
  547.                         link = { count: 1, venues: [venue] };
  548.                         existingLinks[id] = link;
  549.                         if (provID.attributes.url != null) {
  550.                             const u = provID.attributes.url.replace('https://maps.google.com/?', '');
  551.                             link.url = u;
  552.                         }
  553.                     }
  554.                     link.isThisVenue = link.isThisVenue || isThisVenue;
  555.                 }
  556.             });
  557.         });
  558.         return existingLinks;
  559.     }
  560.  
  561.     // Remove the POI point from the map.
  562.     #destroyPoint() {
  563.         if (this.#ptFeature) {
  564.             this.#ptFeature.destroy();
  565.             this.#ptFeature = null;
  566.             this.#lineFeature.destroy();
  567.             this.#lineFeature = null;
  568.         }
  569.     }
  570.  
  571.     // Add the POI point to the map.
  572.     #addPoint(id) {
  573.         if (!id) return;
  574.         const link = this.#linkCache[id];
  575.         if (link) {
  576.             if (!link.notFound) {
  577.                 const coord = link.loc;
  578.                 const poiPt = new OpenLayers.Geometry.Point(coord.lng, coord.lat);
  579.                 poiPt.transform(W.Config.map.projection.remote, W.map.getProjectionObject().projCode);
  580.                 const placeGeom = W.selectionManager.getSelectedFeatures()[0].geometry.getCentroid();
  581.                 const placePt = new OpenLayers.Geometry.Point(placeGeom.x, placeGeom.y);
  582.                 const ext = W.map.getExtent();
  583.                 const lsBounds = new OpenLayers.Geometry.LineString([
  584.                     new OpenLayers.Geometry.Point(ext.left, ext.bottom),
  585.                     new OpenLayers.Geometry.Point(ext.left, ext.top),
  586.                     new OpenLayers.Geometry.Point(ext.right, ext.top),
  587.                     new OpenLayers.Geometry.Point(ext.right, ext.bottom),
  588.                     new OpenLayers.Geometry.Point(ext.left, ext.bottom)]);
  589.                 let lsLine = new OpenLayers.Geometry.LineString([placePt, poiPt]);
  590.  
  591.                 // If the line extends outside the bounds, split it so we don't draw a line across the world.
  592.                 const splits = lsLine.splitWith(lsBounds);
  593.                 let label = '';
  594.                 if (splits) {
  595.                     let splitPoints;
  596.                     splits.forEach(split => {
  597.                         split.components.forEach(component => {
  598.                             if (component.x === placePt.x && component.y === placePt.y) splitPoints = split;
  599.                         });
  600.                     });
  601.                     lsLine = new OpenLayers.Geometry.LineString([splitPoints.components[0], splitPoints.components[1]]);
  602.                     let distance = GoogleLinkEnhancer.#distanceBetweenPoints(poiPt, placePt);
  603.                     let unitConversion;
  604.                     let unit1;
  605.                     let unit2;
  606.                     if (W.model.isImperial) {
  607.                         distance *= 3.28084;
  608.                         unitConversion = 5280;
  609.                         unit1 = ' ft';
  610.                         unit2 = ' mi';
  611.                     } else {
  612.                         unitConversion = 1000;
  613.                         unit1 = ' m';
  614.                         unit2 = ' km';
  615.                     }
  616.                     if (distance > unitConversion * 10) {
  617.                         label = Math.round(distance / unitConversion) + unit2;
  618.                     } else if (distance > 1000) {
  619.                         label = (Math.round(distance / (unitConversion / 10)) / 10) + unit2;
  620.                     } else {
  621.                         label = Math.round(distance) + unit1;
  622.                     }
  623.                 }
  624.  
  625.                 this.#destroyPoint(); // Just in case it still exists.
  626.                 this.#ptFeature = new OpenLayers.Feature.Vector(poiPt, { poiCoord: true }, {
  627.                     pointRadius: 6,
  628.                     strokeWidth: 30,
  629.                     strokeColor: '#FF0',
  630.                     fillColor: '#FF0',
  631.                     strokeOpacity: 0.5
  632.                 });
  633.                 this.#lineFeature = new OpenLayers.Feature.Vector(lsLine, {}, {
  634.                     strokeWidth: 3,
  635.                     strokeDashstyle: '12 8',
  636.                     strokeColor: '#FF0',
  637.                     label,
  638.                     labelYOffset: 45,
  639.                     fontColor: '#FF0',
  640.                     fontWeight: 'bold',
  641.                     labelOutlineColor: '#000',
  642.                     labelOutlineWidth: 4,
  643.                     fontSize: '18'
  644.                 });
  645.                 W.map.getLayerByUniqueName('venues').addFeatures([this.#ptFeature, this.#lineFeature]);
  646.                 this.#timeoutDestroyPoint();
  647.             }
  648.         } else {
  649.             this.#getLinkInfoAsync(id).then(res => {
  650.                 if (res.error || res.apiDisabled) {
  651.                     // API was temporarily disabled.  Ignore for now.
  652.                 } else {
  653.                     this.#addPoint(id);
  654.                 }
  655.             });
  656.         }
  657.     }
  658.  
  659.     // Destroy the point after some time, if it hasn't been destroyed already.
  660.     #timeoutDestroyPoint() {
  661.         if (this.#timeoutID) clearTimeout(this.#timeoutID);
  662.         this.#timeoutID = setTimeout(() => this.#destroyPoint(), 4000);
  663.     }
  664.  
  665.     static #getIdFromElement($el) {
  666.         const providerIndex = $el.parent().children().toArray().indexOf($el[0]);
  667.         return W.selectionManager.getSelectedFeatures()[0].attributes.repositoryObject.getExternalProviderIDs()[providerIndex]?.attributes.uuid;
  668.     }
  669.  
  670.     #addHoverEvent($el) {
  671.         $el.hover(() => this.#addPoint(GoogleLinkEnhancer.#getIdFromElement($el)), () => this.#destroyPoint());
  672.     }
  673.  
  674.     #observeLinks() {
  675.         this.elem = document.querySelector('#edit-panel');
  676.         this.#linkObserver.observe(document.querySelector('#edit-panel'), { childList: true, subtree: true });
  677.     }
  678.  
  679.     // The JSONP interceptor is used to watch the head element for the addition of JSONP functions
  680.     // that process Google link search results. Those functions are overridden by our own so we can
  681.     // process the results before sending them on to the original function.
  682.     #addJsonpInterceptor() {
  683.         // The idea for this function was hatched here:
  684.         // https://stackoverflow.com/questions/6803521/can-google-maps-places-autocomplete-api-be-used-via-ajax/9856786
  685.  
  686.         // The head element, where the Google Autocomplete code will insert a tag
  687.         // for a javascript file.
  688.         const head = $('head')[0];
  689.         // The name of the method the Autocomplete code uses to insert the tag.
  690.         const method = 'appendChild';
  691.         // The method we will be overriding.
  692.         const originalMethod = head[method];
  693.         this.#originalHeadAppendChildMethod = originalMethod;
  694.         const that = this;
  695.         /* eslint-disable func-names, prefer-rest-params */ // Doesn't work as an arrow function (at least not without some modifications)
  696.         head[method] = function() {
  697.             // Check that the element is a javascript tag being inserted by Google.
  698.             if (arguments[0] && arguments[0].src && arguments[0].src.match(/GetPredictions/)) {
  699.                 // Regex to extract the name of the callback method that the JSONP will call.
  700.                 const callbackMatchObject = (/callback=([^&]+)&|$/).exec(arguments[0].src);
  701.  
  702.                 // Regex to extract the search term that was entered by the user.
  703.                 const searchTermMatchObject = (/\?1s([^&]+)&/).exec(arguments[0].src);
  704.  
  705.                 // const searchTerm = unescape(searchTermMatchObject[1]);
  706.                 if (callbackMatchObject && searchTermMatchObject) {
  707.                     // The JSONP callback method is in the form "abc.def" and each time has a different random name.
  708.                     const names = callbackMatchObject[1].split('.');
  709.                     // Store the original callback method.
  710.                     const originalCallback = names[0] && names[1] && window[names[0]] && window[names[0]][names[1]];
  711.  
  712.                     if (originalCallback) {
  713.                         const newCallback = function() { // Define your own JSONP callback
  714.                             if (arguments[0] && arguments[0].predictions) {
  715.                                 // SUCCESS!
  716.  
  717.                                 // The autocomplete results
  718.                                 const data = arguments[0];
  719.  
  720.                                 // console.log('GLE: ' + JSON.stringify(data));
  721.                                 that._lastSearchResultPlaceIds = data.predictions.map(pred => pred.place_id);
  722.  
  723.                                 // Call the original callback so the WME dropdown can do its thing.
  724.                                 originalCallback(data);
  725.                             }
  726.                         };
  727.  
  728.                         // Add copy of all the attributes of the old callback function to the new callback function.
  729.                         // This prevents the autocomplete functionality from throwing an error.
  730.                         Object.keys(originalCallback).forEach(key => {
  731.                             newCallback[key] = originalCallback[key];
  732.                         });
  733.                         window[names[0]][names[1]] = newCallback; // Override the JSONP callback
  734.                     }
  735.                 }
  736.             }
  737.             // Insert the element into the dom, regardless of whether it was being inserted by Google.
  738.             return originalMethod.apply(this, arguments);
  739.         };
  740.         /* eslint-enable func-names, prefer-rest-params */
  741.     }
  742.  
  743.     #removeJsonpInterceptor() {
  744.         $('head')[0].appendChild = this.#originalHeadAppendChildMethod;
  745.     }
  746.  
  747.     /* eslint-disable */ // Disabling eslint since this is copied code.
  748.     #initLZString() {
  749.         // LZ Compressor
  750.         // Copyright (c) 2013 Pieroxy <pieroxy@pieroxy.net>
  751.         // This work is free. You can redistribute it and/or modify it
  752.         // under the terms of the WTFPL, Version 2
  753.         // LZ-based compression algorithm, version 1.4.4
  754.         this.#lzString = (function () {
  755.             // private property
  756.             const f = String.fromCharCode;
  757.             const keyStrBase64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
  758.             const keyStrUriSafe = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-$";
  759.             const baseReverseDic = {};
  760.  
  761.             function getBaseValue(alphabet, character) {
  762.                 if (!baseReverseDic[alphabet]) {
  763.                     baseReverseDic[alphabet] = {};
  764.                     for (let i = 0; i < alphabet.length; i++) {
  765.                         baseReverseDic[alphabet][alphabet.charAt(i)] = i;
  766.                     }
  767.                 }
  768.                 return baseReverseDic[alphabet][character];
  769.             }
  770.             var LZString = {
  771.                 compressToBase64: function (input) {
  772.                     if (input === null) return "";
  773.                     const res = LZString._compress(input, 6, function (a) {
  774.                         return keyStrBase64.charAt(a);
  775.                     });
  776.                     switch (res.length % 4) { // To produce valid Base64
  777.                         default: // When could this happen ?
  778.                         case 0:
  779.                             return res;
  780.                         case 1:
  781.                             return res + "===";
  782.                         case 2:
  783.                             return res + "==";
  784.                         case 3:
  785.                             return res + "=";
  786.                     }
  787.                 },
  788.                 decompressFromBase64: function (input) {
  789.                     if (input === null) return "";
  790.                     if (input === "") return null;
  791.                     return LZString._decompress(input.length, 32, function (index) {
  792.                         return getBaseValue(keyStrBase64, input.charAt(index));
  793.                     });
  794.                 },
  795.                 compressToUTF16: function (input) {
  796.                     if (input === null) return "";
  797.                     return LZString._compress(input, 15, function (a) {
  798.                         return f(a + 32);
  799.                     }) + " ";
  800.                 },
  801.                 decompressFromUTF16: function (compressed) {
  802.                     if (compressed === null) return "";
  803.                     if (compressed === "") return null;
  804.                     return LZString._decompress(compressed.length, 16384, function (index) {
  805.                         return compressed.charCodeAt(index) - 32;
  806.                     });
  807.                 },
  808.  
  809.                 compress: function (uncompressed) {
  810.                     return LZString._compress(uncompressed, 16, function (a) {
  811.                         return f(a);
  812.                     });
  813.                 },
  814.                 _compress: function (uncompressed, bitsPerChar, getCharFromInt) {
  815.                     if (uncompressed === null) return "";
  816.                     let i, value,
  817.                         context_dictionary = {},
  818.                         context_dictionaryToCreate = {},
  819.                         context_c = "",
  820.                         context_wc = "",
  821.                         context_w = "",
  822.                         context_enlargeIn = 2, // Compensate for the first entry which should not count
  823.                         context_dictSize = 3,
  824.                         context_numBits = 2,
  825.                         context_data = [],
  826.                         context_data_val = 0,
  827.                         context_data_position = 0,
  828.                         ii;
  829.                     for (ii = 0; ii < uncompressed.length; ii += 1) {
  830.                         context_c = uncompressed.charAt(ii);
  831.                         if (!Object.prototype.hasOwnProperty.call(context_dictionary, context_c)) {
  832.                             context_dictionary[context_c] = context_dictSize++;
  833.                             context_dictionaryToCreate[context_c] = true;
  834.                         }
  835.                         context_wc = context_w + context_c;
  836.                         if (Object.prototype.hasOwnProperty.call(context_dictionary, context_wc)) {
  837.                             context_w = context_wc;
  838.                         } else {
  839.                             if (Object.prototype.hasOwnProperty.call(context_dictionaryToCreate, context_w)) {
  840.                                 if (context_w.charCodeAt(0) < 256) {
  841.                                     for (i = 0; i < context_numBits; i++) {
  842.                                         context_data_val = (context_data_val << 1);
  843.                                         if (context_data_position === bitsPerChar - 1) {
  844.                                             context_data_position = 0;
  845.                                             context_data.push(getCharFromInt(context_data_val));
  846.                                             context_data_val = 0;
  847.                                         } else {
  848.                                             context_data_position++;
  849.                                         }
  850.                                     }
  851.                                     value = context_w.charCodeAt(0);
  852.                                     for (i = 0; i < 8; i++) {
  853.                                         context_data_val = (context_data_val << 1) | (value & 1);
  854.                                         if (context_data_position === bitsPerChar - 1) {
  855.                                             context_data_position = 0;
  856.                                             context_data.push(getCharFromInt(context_data_val));
  857.                                             context_data_val = 0;
  858.                                         } else {
  859.                                             context_data_position++;
  860.                                         }
  861.                                         value = value >> 1;
  862.                                     }
  863.                                 } else {
  864.                                     value = 1;
  865.                                     for (i = 0; i < context_numBits; i++) {
  866.                                         context_data_val = (context_data_val << 1) | value;
  867.                                         if (context_data_position === bitsPerChar - 1) {
  868.                                             context_data_position = 0;
  869.                                             context_data.push(getCharFromInt(context_data_val));
  870.                                             context_data_val = 0;
  871.                                         } else {
  872.                                             context_data_position++;
  873.                                         }
  874.                                         value = 0;
  875.                                     }
  876.                                     value = context_w.charCodeAt(0);
  877.                                     for (i = 0; i < 16; i++) {
  878.                                         context_data_val = (context_data_val << 1) | (value & 1);
  879.                                         if (context_data_position === bitsPerChar - 1) {
  880.                                             context_data_position = 0;
  881.                                             context_data.push(getCharFromInt(context_data_val));
  882.                                             context_data_val = 0;
  883.                                         } else {
  884.                                             context_data_position++;
  885.                                         }
  886.                                         value = value >> 1;
  887.                                     }
  888.                                 }
  889.                                 context_enlargeIn--;
  890.                                 if (context_enlargeIn === 0) {
  891.                                     context_enlargeIn = Math.pow(2, context_numBits);
  892.                                     context_numBits++;
  893.                                 }
  894.                                 delete context_dictionaryToCreate[context_w];
  895.                             } else {
  896.                                 value = context_dictionary[context_w];
  897.                                 for (i = 0; i < context_numBits; i++) {
  898.                                     context_data_val = (context_data_val << 1) | (value & 1);
  899.                                     if (context_data_position === bitsPerChar - 1) {
  900.                                         context_data_position = 0;
  901.                                         context_data.push(getCharFromInt(context_data_val));
  902.                                         context_data_val = 0;
  903.                                     } else {
  904.                                         context_data_position++;
  905.                                     }
  906.                                     value = value >> 1;
  907.                                 }
  908.                             }
  909.                             context_enlargeIn--;
  910.                             if (context_enlargeIn === 0) {
  911.                                 context_enlargeIn = Math.pow(2, context_numBits);
  912.                                 context_numBits++;
  913.                             }
  914.                             // Add wc to the dictionary.
  915.                             context_dictionary[context_wc] = context_dictSize++;
  916.                             context_w = String(context_c);
  917.                         }
  918.                     }
  919.                     // Output the code for w.
  920.                     if (context_w !== "") {
  921.                         if (Object.prototype.hasOwnProperty.call(context_dictionaryToCreate, context_w)) {
  922.                             if (context_w.charCodeAt(0) < 256) {
  923.                                 for (i = 0; i < context_numBits; i++) {
  924.                                     context_data_val = (context_data_val << 1);
  925.                                     if (context_data_position === bitsPerChar - 1) {
  926.                                         context_data_position = 0;
  927.                                         context_data.push(getCharFromInt(context_data_val));
  928.                                         context_data_val = 0;
  929.                                     } else {
  930.                                         context_data_position++;
  931.                                     }
  932.                                 }
  933.                                 value = context_w.charCodeAt(0);
  934.                                 for (i = 0; i < 8; i++) {
  935.                                     context_data_val = (context_data_val << 1) | (value & 1);
  936.                                     if (context_data_position === bitsPerChar - 1) {
  937.                                         context_data_position = 0;
  938.                                         context_data.push(getCharFromInt(context_data_val));
  939.                                         context_data_val = 0;
  940.                                     } else {
  941.                                         context_data_position++;
  942.                                     }
  943.                                     value = value >> 1;
  944.                                 }
  945.                             } else {
  946.                                 value = 1;
  947.                                 for (i = 0; i < context_numBits; i++) {
  948.                                     context_data_val = (context_data_val << 1) | value;
  949.                                     if (context_data_position === bitsPerChar - 1) {
  950.                                         context_data_position = 0;
  951.                                         context_data.push(getCharFromInt(context_data_val));
  952.                                         context_data_val = 0;
  953.                                     } else {
  954.                                         context_data_position++;
  955.                                     }
  956.                                     value = 0;
  957.                                 }
  958.                                 value = context_w.charCodeAt(0);
  959.                                 for (i = 0; i < 16; i++) {
  960.                                     context_data_val = (context_data_val << 1) | (value & 1);
  961.                                     if (context_data_position === bitsPerChar - 1) {
  962.                                         context_data_position = 0;
  963.                                         context_data.push(getCharFromInt(context_data_val));
  964.                                         context_data_val = 0;
  965.                                     } else {
  966.                                         context_data_position++;
  967.                                     }
  968.                                     value = value >> 1;
  969.                                 }
  970.                             }
  971.                             context_enlargeIn--;
  972.                             if (context_enlargeIn === 0) {
  973.                                 context_enlargeIn = Math.pow(2, context_numBits);
  974.                                 context_numBits++;
  975.                             }
  976.                             delete context_dictionaryToCreate[context_w];
  977.                         } else {
  978.                             value = context_dictionary[context_w];
  979.                             for (i = 0; i < context_numBits; i++) {
  980.                                 context_data_val = (context_data_val << 1) | (value & 1);
  981.                                 if (context_data_position === bitsPerChar - 1) {
  982.                                     context_data_position = 0;
  983.                                     context_data.push(getCharFromInt(context_data_val));
  984.                                     context_data_val = 0;
  985.                                 } else {
  986.                                     context_data_position++;
  987.                                 }
  988.                                 value = value >> 1;
  989.                             }
  990.                         }
  991.                         context_enlargeIn--;
  992.                         if (context_enlargeIn === 0) {
  993.                             context_enlargeIn = Math.pow(2, context_numBits);
  994.                             context_numBits++;
  995.                         }
  996.                     }
  997.                     // Mark the end of the stream
  998.                     value = 2;
  999.                     for (i = 0; i < context_numBits; i++) {
  1000.                         context_data_val = (context_data_val << 1) | (value & 1);
  1001.                         if (context_data_position === bitsPerChar - 1) {
  1002.                             context_data_position = 0;
  1003.                             context_data.push(getCharFromInt(context_data_val));
  1004.                             context_data_val = 0;
  1005.                         } else {
  1006.                             context_data_position++;
  1007.                         }
  1008.                         value = value >> 1;
  1009.                     }
  1010.                     // Flush the last char
  1011.                     while (true) {
  1012.                         context_data_val = (context_data_val << 1);
  1013.                         if (context_data_position === bitsPerChar - 1) {
  1014.                             context_data.push(getCharFromInt(context_data_val));
  1015.                             break;
  1016.                         } else context_data_position++;
  1017.                     }
  1018.                     return context_data.join('');
  1019.                 },
  1020.                 decompress: function (compressed) {
  1021.                     if (compressed === null) return "";
  1022.                     if (compressed === "") return null;
  1023.                     return LZString._decompress(compressed.length, 32768, function (index) {
  1024.                         return compressed.charCodeAt(index);
  1025.                     });
  1026.                 },
  1027.                 _decompress: function (length, resetValue, getNextValue) {
  1028.                     let dictionary = [],
  1029.                         next,
  1030.                         enlargeIn = 4,
  1031.                         dictSize = 4,
  1032.                         numBits = 3,
  1033.                         entry = "",
  1034.                         result = [],
  1035.                         i,
  1036.                         w,
  1037.                         bits, resb, maxpower, power,
  1038.                         c,
  1039.                         data = {
  1040.                             val: getNextValue(0),
  1041.                             position: resetValue,
  1042.                             index: 1
  1043.                         };
  1044.                     for (i = 0; i < 3; i += 1) {
  1045.                         dictionary[i] = i;
  1046.                     }
  1047.                     bits = 0;
  1048.                     maxpower = Math.pow(2, 2);
  1049.                     power = 1;
  1050.                     while (power !== maxpower) {
  1051.                         resb = data.val & data.position;
  1052.                         data.position >>= 1;
  1053.                         if (data.position === 0) {
  1054.                             data.position = resetValue;
  1055.                             data.val = getNextValue(data.index++);
  1056.                         }
  1057.                         bits |= (resb > 0 ? 1 : 0) * power;
  1058.                         power <<= 1;
  1059.                     }
  1060.                     switch (next = bits) {
  1061.                         case 0:
  1062.                             bits = 0;
  1063.                             maxpower = Math.pow(2, 8);
  1064.                             power = 1;
  1065.                             while (power !== maxpower) {
  1066.                                 resb = data.val & data.position;
  1067.                                 data.position >>= 1;
  1068.                                 if (data.position === 0) {
  1069.                                     data.position = resetValue;
  1070.                                     data.val = getNextValue(data.index++);
  1071.                                 }
  1072.                                 bits |= (resb > 0 ? 1 : 0) * power;
  1073.                                 power <<= 1;
  1074.                             }
  1075.                             c = f(bits);
  1076.                             break;
  1077.                         case 1:
  1078.                             bits = 0;
  1079.                             maxpower = Math.pow(2, 16);
  1080.                             power = 1;
  1081.                             while (power !== maxpower) {
  1082.                                 resb = data.val & data.position;
  1083.                                 data.position >>= 1;
  1084.                                 if (data.position === 0) {
  1085.                                     data.position = resetValue;
  1086.                                     data.val = getNextValue(data.index++);
  1087.                                 }
  1088.                                 bits |= (resb > 0 ? 1 : 0) * power;
  1089.                                 power <<= 1;
  1090.                             }
  1091.                             c = f(bits);
  1092.                             break;
  1093.                         case 2:
  1094.                             return "";
  1095.                     }
  1096.                     dictionary[3] = c;
  1097.                     w = c;
  1098.                     result.push(c);
  1099.                     while (true) {
  1100.                         if (data.index > length) {
  1101.                             return "";
  1102.                         }
  1103.                         bits = 0;
  1104.                         maxpower = Math.pow(2, numBits);
  1105.                         power = 1;
  1106.                         while (power !== maxpower) {
  1107.                             resb = data.val & data.position;
  1108.                             data.position >>= 1;
  1109.                             if (data.position === 0) {
  1110.                                 data.position = resetValue;
  1111.                                 data.val = getNextValue(data.index++);
  1112.                             }
  1113.                             bits |= (resb > 0 ? 1 : 0) * power;
  1114.                             power <<= 1;
  1115.                         }
  1116.                         switch (c = bits) {
  1117.                             case 0:
  1118.                                 bits = 0;
  1119.                                 maxpower = Math.pow(2, 8);
  1120.                                 power = 1;
  1121.                                 while (power !== maxpower) {
  1122.                                     resb = data.val & data.position;
  1123.                                     data.position >>= 1;
  1124.                                     if (data.position === 0) {
  1125.                                         data.position = resetValue;
  1126.                                         data.val = getNextValue(data.index++);
  1127.                                     }
  1128.                                     bits |= (resb > 0 ? 1 : 0) * power;
  1129.                                     power <<= 1;
  1130.                                 }
  1131.                                 dictionary[dictSize++] = f(bits);
  1132.                                 c = dictSize - 1;
  1133.                                 enlargeIn--;
  1134.                                 break;
  1135.                             case 1:
  1136.                                 bits = 0;
  1137.                                 maxpower = Math.pow(2, 16);
  1138.                                 power = 1;
  1139.                                 while (power !== maxpower) {
  1140.                                     resb = data.val & data.position;
  1141.                                     data.position >>= 1;
  1142.                                     if (data.position === 0) {
  1143.                                         data.position = resetValue;
  1144.                                         data.val = getNextValue(data.index++);
  1145.                                     }
  1146.                                     bits |= (resb > 0 ? 1 : 0) * power;
  1147.                                     power <<= 1;
  1148.                                 }
  1149.                                 dictionary[dictSize++] = f(bits);
  1150.                                 c = dictSize - 1;
  1151.                                 enlargeIn--;
  1152.                                 break;
  1153.                             case 2:
  1154.                                 return result.join('');
  1155.                         }
  1156.                         if (enlargeIn === 0) {
  1157.                             enlargeIn = Math.pow(2, numBits);
  1158.                             numBits++;
  1159.                         }
  1160.                         if (dictionary[c]) {
  1161.                             entry = dictionary[c];
  1162.                         } else {
  1163.                             if (c === dictSize) {
  1164.                                 entry = w + w.charAt(0);
  1165.                             } else {
  1166.                                 return null;
  1167.                             }
  1168.                         }
  1169.                         result.push(entry);
  1170.                         // Add w+entry[0] to the dictionary.
  1171.                         dictionary[dictSize++] = w + entry.charAt(0);
  1172.                         enlargeIn--;
  1173.                         w = entry;
  1174.                         if (enlargeIn === 0) {
  1175.                             enlargeIn = Math.pow(2, numBits);
  1176.                             numBits++;
  1177.                         }
  1178.                     }
  1179.                 }
  1180.             };
  1181.             return LZString;
  1182.         })();
  1183.     }
  1184.     /* eslint-enable */
  1185. }