(function() { var options = {"id":7862,"hash":"0bf95287c09f0f23fda74d1b10be6efc","siteUrl":"https:\/\/libanswers.lib.xjtlu.edu.cn","iid":1591,"onlinerules":[{"u":0,"d":[2532,2533,2534,2535,3843],"c":""}],"width":"400px","height":"340px","color_backg":"#f9f9f9","autoload_time":0,"slidebutton_url":"https:\/\/libguides.lib.xjtlu.edu.cn\/ld.php?content_id=29294787","slidebutton_text":"","slidebutton_height":"95px","slidebutton_bcolor":"transparent","slidebutton_color":"#FFFFFF","slidebutton_position":"r"}; var cascadeServer = "https:\/\/chat-au.libanswers.com"; var referer = ""; var refererTitle = ""; const removeCoverageFromRule=function(rule){return{u:rule.u,d:rule.d,c:rule.c,fallbackSeconds:rule.fallbackSeconds||0}},isCoverageInRange=function(hour,minute,ranges){if(0===ranges.length)return!1;for(let i=0;i<=ranges.length;i++){const range=ranges[i];if(!Array.isArray(range)||2!==range.length)continue;const start=range[0].split(":").map((el=>parseInt(el,10))),end=range[1].split(":").map((el=>parseInt(el,10)));if(!(start[0]>hour||end[0]<hour)){if(start[0]<hour&&end[0]>hour)return!0;if(start[0]!==hour){if(end[0]!==hour);else if(end[1]>minute)return!0}else if(start[1]<minute)return!0}}return!1};var adjustStatusRequestForCoverage=function(onlineRules){const finalRules=[],now=new Date,day=now.getUTCDay(),hour=now.getUTCHours(),minute=now.getUTCMinutes();return onlineRules.forEach((rule=>{if(!rule.c||1===rule.coverageType)return void finalRules.push(removeCoverageFromRule(rule));if(0===rule.coverageType)return;const times=rule.coverageHours;if(!times||!times[day]||0===times[day].length)return;const ranges=times[day];isCoverageInRange(hour,minute,ranges)&&finalRules.push(removeCoverageFromRule(rule))})),finalRules};;
const tabWidget={config:{},online:!1,loaded:!1,statusChecked:!1,autoload:!1,isCoopOnline:!1,chatContainer:null,chatButton:null,overlay:null,iframeContainer:null,iframe:null,chatTimer:null,referer:"",refererTitle:"",boundKeyboardHandler:null,boundOverlayHandler:null,narrowScreen:null,isNarrowScreen:function(){if(null!==this.narrowScreen)return this.narrowScreen;const mediaQuery=window.matchMedia("(max-width: 700px)");return this.narrowScreen=mediaQuery.matches,this.narrowScreen},getWidgetUrl:function(){""===this.referer&&(this.referer=window.location.href),""===this.refererTitle&&window.document.title&&(this.refererTitle=window.document.title);let authId=0;window.springSpace&&window.springSpace.la&&window.springSpace.la.Page&&window.springSpace.la.Page.auth_id&&(authId=window.springSpace.la.Page.auth_id);let qs=`${this.config.siteUrl}/chat/widget/${this.config.hash}?referer=${encodeURIComponent(this.referer)}&referer_title=${encodeURIComponent(this.refererTitle)}&auth_id=${authId}`;return this.autoload&&(qs+="&auto=true",this.autoload=!1),qs},deleteAutoPopDeny:function(){try{localStorage.removeItem("libchat_auto")}catch(e){}},autoPopDenied:function(){try{let obj=localStorage.getItem("libchat_auto");if(""===obj)return!1;obj=JSON.parse(obj);return!(Math.floor(Date.now()/1e3)-obj.date>3600)||(this.deleteAutoPopDeny(),!1)}catch(e){this.deleteAutoPopDeny()}return!1},autoLoadWidget:function(){this.autoPopDenied()||(this.autoload=!0,this.checkStatus())},setTimer:function(){this.isNarrowScreen()||!this.config.autoload_time||0===parseInt(this.config.autoload_time,10)||this.autoPopDenied()||(this.chatTimer=window.setTimeout(this.autoLoadWidget.bind(this),1e3*parseInt(this.config.autoload_time,10)))},openWidget:function(){this.iframeContainer.style.display="block",this.chatContainer.classList.add("open"),this.iframeContainer.setAttribute("aria-hidden","false"),this.chatButton.setAttribute("aria-expanded",!0),this.boundKeyboardHandler=this.keyboardCloseWidget.bind(this),document.body.addEventListener("keydown",this.boundKeyboardHandler)},closeWidget:function(){this.iframeContainer.style.display="none",this.chatContainer.classList.remove("open"),this.iframeContainer.setAttribute("aria-hidden","true"),this.chatButton.setAttribute("aria-expanded",!1),document.body.removeEventListener("keydown",this.boundKeyboardHandler),this.boundOverlayHandler&&this.overlay.removeEventListener("click",this.boundOverlayHandler),this.overlay.style.display="none"},keyboardCloseWidget:function(ev){"Escape"===ev.key&&this.closeWidget()},handleWidgetToggle:function(ev){ev.preventDefault(),window.clearTimeout(this.chatTimer),this.chatContainer.classList.contains("open")?this.closeWidget():(this.statusChecked||this.checkStatus(),this.openWidget())},openChat:function(){const chatUrl=this.getWidgetUrl();window.open(chatUrl,"libchat",`toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=yes, copyhistory=no, width=${this.config.width}, height=${this.config.height}`)},buildTab:function(){this.chatContainer=document.createElement("div"),this.chatContainer.id=`lcs_slide_out-${this.config.id}`,this.chatContainer.setAttribute("role","region"),this.chatContainer.setAttribute("aria-label",this.config.slidebutton_text),this.chatContainer.classList.add("lcs_slide_out"),this.chatContainer.classList.add(`lcs_slide_out-${this.config.slidebutton_position}`);const openerId=`lcs_slide_out_button-${this.config.id}`;this.overlay=document.createElement("div"),this.overlay.classList.add("tab_overlay"),this.chatContainer.appendChild(this.overlay);const chat_header=document.createElement("header");if(chat_header.setAttribute("aria-labelledby",openerId),this.chatButton=document.createElement("a"),this.chatButton.id=openerId,this.chatButton.setAttribute("role","button"),this.chatButton.setAttribute("aria-controls",`lcs_slide_out-${this.config.id}`),this.chatButton.setAttribute("aria-expanded",!1),this.chatButton.setAttribute("href","#"),chat_header.appendChild(this.chatButton),this.chatContainer.appendChild(chat_header),this.iframeContainer=document.createElement("div"),this.iframeContainer.classList.add("lcs_load"),this.iframeContainer.setAttribute("aria-hidden","true"),this.chatContainer.appendChild(this.iframeContainer),this.config.slidebutton_url&&""!==this.config.slidebutton_url){const img=document.createElement("img");img.setAttribute("src",this.config.slidebutton_url),img.setAttribute("alt",this.config.slidebutton_text),this.chatButton.style.padding="0",this.chatButton.appendChild(img)}else this.config.slidebutton_color||(this.config.slidebutton_color="#ffffff"),this.chatButton.innerHTML=this.config.slidebutton_text,this.chatButton.style.borderColor=this.config.slidebutton_color,this.chatButton.style.color=this.config.slidebutton_color,this.chatButton.style.backgroundColor=this.config.slidebutton_bcolor,this.chatButton.style.boxShadow="rgb(204, 204, 204) 0px 0px 5px","b"===this.config.slidebutton_position?this.chatButton.style.borderWidth="4px 4px 0px 4px":this.chatButton.style.borderWidth="0px 4px 4px 4px";document.body.appendChild(this.chatContainer),this.isNarrowScreen()?this.chatButton.addEventListener("click",this.openChat.bind(this)):this.chatButton.addEventListener("click",this.handleWidgetToggle.bind(this))},handleMessage:function(ev){const data=ev.data;if("object"==typeof data&&data.action)switch(data.action){case"closeWidget":this.chatButton.focus(),this.closeWidget(),this.iframeContainer.removeAttribute("aria-live"),this.iframeContainer.setAttribute("aria-hidden","true");break;case"chatStarted":this.boundOverlayHandler&&this.overlay.removeEventListener("click",this.boundOverlayHandler),this.overlay.style.display="none";break;case"autopop":this.openWidget(),this.boundOverlayHandler=this.closeWidget.bind(this),this.overlay.addEventListener("click",this.boundOverlayHandler),this.overlay.style.display="block"}},loadIframe:function(){if(this.iframe)return;if((!1===this.online||this.isCoopOnline)&&!0===this.autoload)return this.autoload=!1,void(this.statusChecked=!1);const widgetUrl=this.getWidgetUrl();!0===this.autoload&&(this.autoload=!1,this.iframeContainer.setAttribute("aria-live","polite"),this.iframeContainer.setAttribute("aria-hidden","false")),window.addEventListener("message",this.handleMessage.bind(this)),this.iframe=document.createElement("iframe"),this.iframe.setAttribute("id",`iframe_${this.config.hash}`),this.iframe.setAttribute("name",`iframe_${this.config.hash}`),this.iframe.setAttribute("src",widgetUrl),this.iframe.setAttribute("title","Chat Widget"),this.iframe.setAttribute("scrolling","no"),this.iframe.innerHTML="Content is loading...",this.iframeContainer.appendChild(this.iframe)},statusError:function(){this.online=!1,this.loadIframe()},statusSuccess:function(data){this.online=!1,(data.u||data.d||data.c)&&(this.online=!0),data.c&&data.c.length>0&&(this.isCoopOnline=!0),this.loadIframe()},statusComplete:function(ev){const xhr=ev.target,status=xhr.status;if(status>=200&&status<300)try{this.statusSuccess(JSON.parse(xhr.responseText))}catch(e){this.statusError()}else this.statusError()},checkStatus:function(){const adjustedRules=adjustStatusRequestForCoverage(this.config.onlinerules);this.statusChecked=!0;const xhr=new XMLHttpRequest;xhr.onload=this.statusComplete.bind(this),xhr.onerror=this.statusError.bind(this),xhr.open("GET",`${this.cascadeServer}/widget_status?iid=${this.config.iid}&rules=${encodeURIComponent(JSON.stringify(adjustedRules))}`),xhr.send()},insertWidgetCSS:function(){let b_btn_offset="-42px";this.config.slidebutton_url&&""!==this.config.slidebutton_url&&this.config.slidebutton_height&&""!==this.config.slidebutton_height&&(b_btn_offset=`-${this.config.slidebutton_height}`);const iframeHeight=parseInt(this.config.height,10)-2,css=`/* LibChat Widget CSS */\n        .lcs_slide_out { width: ${this.config.width}; height: ${this.config.height}; position: fixed; transition-duration: 0.6s; background-color: rgb(249, 249, 249); border: 1px solid #ccc; z-index: 1000; }\n        .lcs_slide_out header { display: block; z-index: 501; position: relative; }\n        .lcs_slide_out header a { text-align: center; padding: 10px; display: block; position: absolute; border-width: 0; border-style: solid; background-color: ${this.config.slidebutton_bcolor}; }\n        .lcs_load { width: ${this.config.width}; height: 100%; padding: 0 2px 0 0; box-sizing: border-box; z-index: 501; position: relative; }\n        .lcs_slide_out-l { top: 100px; left: -${this.config.width}; }\n        .lcs_slide_out-l.open { left: 0px; }\n        .lcs_slide_out-l header { transform: rotate(-90deg); transform-origin: top right; }\n        .lcs_slide_out-l header a { right: 10px; }\n        .lcs_slide_out-r { top: 100px; right: -${this.config.width}; }\n        .lcs_slide_out-r.open { right: 0px; }\n        .lcs_slide_out-r header { transform: rotate(90deg); transform-origin: top left; }\n        .lcs_slide_out-r header a { left: 10px; }\n        .lcs_slide_out-b { right: 100px; bottom: -2px; height: 0; }\n        .lcs_slide_out-b.open { height: ${this.config.height}; }\n        .lcs_slide_out-b header a { left: 10px; bottom: 0px; border-width: 1px 1px 0px 1px; }\n        .lcs_slide_out-b.open header a { top: ${b_btn_offset}; bottom: auto; }\n        .lcs_slide_out iframe { width: 100%; height: ${iframeHeight}px; background-color: ${this.config.color_backg}; border: 0px; box-sizing:border-box; }\n        .lcs_slide_out div.tab_overlay { position: fixed; background-color: rgb(0, 0, 0); top: 0; left: 0; bottom: 0; right: 0; opacity: 0.0; z-index: 500; display: none; }\n        @media (max-width: 768px) {\n            .lcs_slide_out { width: 80%; }\n            .lcs_load { width: 100% }\n            .lcs_slide_out-l { left: -80%; }\n            .lcs_slide_out-r { right: -80%; }\n            .lcs_slide_out-b { left: 0; }\n        }`,head=document.head||document.getElementsByTagName("head")[0],style=document.createElement("style");style.styleSheet?style.styleSheet.cssText=css:style.appendChild(document.createTextNode(css)),head.appendChild(style)},start:function(){!0!==this.loaded&&(this.loaded=!0,this.insertWidgetCSS(),this.buildTab(),this.setTimer(),document.addEventListener("visibilitychange",(()=>{"visible"!==document.visibilityState||this.iframe||(this.statusChecked=!1)})))}};tabWidget.config=options,tabWidget.cascadeServer=cascadeServer,tabWidget.referer=referer,tabWidget.refererTitle=refererTitle,"complete"===document.readyState||"interactive"===document.readyState?tabWidget.start():(document.addEventListener("DOMContentLoaded",tabWidget.start.bind(tabWidget),!1),window.addEventListener("load",tabWidget.start.bind(tabWidget),!1));})();