function tzSelect(regionSelector,citySelector,onchange,onload){const TIMEZONE_FILE='/shared/resources/tz.json';const APN_TZ_FILE='/shared/resources/apn_tz.json';const TIMEZONE_NONE='NONE';const TIMEZONE_NETWORK='NETWORK';const TIMEZONE_SIM='SIM';const TIMEZONE_USER='USER';const TIMEZONE_PREVIOUS_SETTING='PREVIOUS_SETTING';function loadJSON(href,callback){var xhr=new XMLHttpRequest();xhr.open('GET',href,true);xhr.responseType='json';xhr.onerror=callback;xhr.onload=function(){callback(xhr.response);};xhr.onerror=function(){console.error('Error getting file');callback(xhr.response);};xhr.send();}
function getDefaultTimezoneID(callback){if(!callback){return;}
var tzDefault='America/New_York';var source=TIMEZONE_NONE;var mcc,mnc;var connections=window.navigator.mozMobileConnections||[];for(var i=0;i<connections.length;++i){var conn=connections[i];if(conn&&conn.voice&&conn.voice.network&&conn.voice.connected){mcc=conn.voice.network.mcc;mnc=conn.voice.network.mnc;source=TIMEZONE_NETWORK;break;}}
if(!mcc&&IccHelper&&IccHelper.iccInfo){mcc=IccHelper.iccInfo.mcc;mnc=IccHelper.iccInfo.mnc;source=TIMEZONE_SIM;if(IccHelper.cardState!=='ready'){IccHelper.addEventListener('iccinfochange',function simReady(){if(IccHelper.iccInfo.mcc){IccHelper.removeEventListener('iccinfochange',simReady);}
getDefaultTimezoneID(callback);});}}
if(!mcc){callback(tzDefault,TIMEZONE_NONE);return;}
loadJSON(APN_TZ_FILE,function(response){if(response){var tz=response[mcc];if(typeof(tz)==='string'){callback(tz,source);return;}else if(tz&&(mnc in tz)){callback(tz[mnc],source);return;}}
callback(tzDefault,TIMEZONE_NONE);});}
function newTZSelector(onchangeTZ,currentID,source){var gRegion=currentID.replace(/\/.*/,'');var gCity=currentID.replace(/.*?\//,'');var gTZ=null;function fillSelectElement(selector,options){selector.innerHTML='';options.sort(function(a,b){return(a.text>b.text);});for(var i=0;i<options.length;i++){var option=document.createElement('option');option.textContent=options[i].text;option.selected=options[i].selected;option.value=options[i].value;selector.appendChild(option);}}
function fillSelectL10nElement(selector,options){selector.innerHTML='';const collator=Intl.Collator(navigator.languages,{usage:'sort',});const frag=document.createDocumentFragment();const items=options.map(option=>{const item=document.createElement('option');item.setAttribute('data-l10n-id',option.l10nId);item.selected=option.selected;item.value=option.value;frag.appendChild(item);return item;});return document.l10n.translateFragment(frag).then(()=>{items.sort((a,b)=>collator.compare(a.textContent,b.textContent));items.forEach(item=>frag.appendChild(item));selector.appendChild(frag);});}
function getSelectedText(selector){var options=selector.querySelectorAll('option');return options[selector.selectedIndex].textContent;}
function fillRegions(){var options=[];for(var c in gTZ){options.push({l10nId:'tzRegion-'+c,value:c,selected:(c===gRegion)});}
fillSelectL10nElement(regionSelector,options).then(fillCities);}
function fillCities(){gRegion=regionSelector.value;var list=gTZ[gRegion];var options=[];for(var i=0;i<list.length;i++){options.push({text:list[i].name||list[i].city.replace(/_/g,' '),value:i,selected:(list[i].city===gCity)});}
fillSelectElement(citySelector,options);setTimezone();}
function setTimezone(){if(source===TIMEZONE_PREVIOUS_SETTING){onload&&onload(getTZInfo(),true);return;}
onchangeTZ(getTZInfo(),{'changedByUser':source===TIMEZONE_USER,'needsConfirmation':source!==TIMEZONE_USER&&source!==TIMEZONE_NETWORK});}
function getTZInfo(){var res=gTZ[gRegion][citySelector.value];gCity=res.city;var offset=res.offset.split(',');return{id:res.id||gRegion+'/'+res.city,region:getSelectedText(regionSelector),city:getSelectedText(citySelector),cc:res.cc,utcOffset:offset[0],dstOffset:offset[1]};}
regionSelector.onchange=function(){source=TIMEZONE_USER;fillCities();};citySelector.onchange=function(){source=TIMEZONE_USER;setTimezone();};loadJSON(TIMEZONE_FILE,function loadTZ(response){gTZ=response;fillRegions();});}
function newTZObserver(){var settings=window.navigator.mozSettings;if(!settings){return;}
settings.addObserver('time.timezone',function(event){setTimezoneDescription(event.settingValue);});var systemTimeChanged=function(){onchange(systemTimeChanged.tz,systemTimeChanged.needsConfirmation);};function updateTZ(tz,options){systemTimeChanged.tz=tz;systemTimeChanged.needsConfirmation=options.needsConfirmation;var req=settings.createLock().set({'time.timezone':tz.id});req.onsuccess=function updateTZ_callback(){if(options.changedByUser){settings.createLock().set({'time.timezone.user-selected':tz.id});}else{onload&&onload(tz,options.needsConfirmation);}};}
function initSelector(initialValue,source){onchange&&window.addEventListener('moztimechange',systemTimeChanged);onchange&&window.addEventListener('unload',function(){window.removeEventListener('moztimechange',systemTimeChanged);});newTZSelector(updateTZ,initialValue,source);}
var reqTimezone=settings.createLock().get('time.timezone');reqTimezone.onsuccess=function dt_getStatusSuccess(){var reqUserTZ=settings.createLock().get('time.timezone.user-selected');reqUserTZ.onsuccess=function dt_getUserTimezoneSuccess(){var userSelTimezone=reqUserTZ.result['time.timezone.user-selected'];if(userSelTimezone){initSelector(userSelTimezone,TIMEZONE_PREVIOUS_SETTING);}else{getDefaultTimezoneID(initSelector);}};};function setTimezoneDescription(timezoneID){var oldSelectedIndex=regionSelector.selectedIndex;regionSelector.value=timezoneID.replace(/\/.*/,'');if(regionSelector.selectedIndex==-1){regionSelector.selectedIndex=oldSelectedIndex;}
oldSelectedIndex=citySelector.selectedIndex;citySelector.value=timezoneID.replace(/.*?\//,'');if(citySelector.selectedIndex==-1){citySelector.selectedIndex=oldSelectedIndex;}}}
newTZObserver();}