google.load("maps","2",{other_params:"sensor=false"});google.setOnLoadCallback(Setup);var mapElement=document.getElementById('map');var map;var stationIcon,transferIcon;var redTrainIcons=[];var greenTrainIcons=[];var blueTrainIcons=[];var yellowTrainIcons=[];var orangeTrainIcons=[];var allIcons=[];allIcons['red']=redTrainIcons;allIcons['green']=greenTrainIcons;allIcons['blue']=blueTrainIcons;allIcons['yellow']=yellowTrainIcons;allIcons['orange']=orangeTrainIcons;var stops,routeStops,segmentSecs;var countElement=document.getElementById('count');function Setup()
{acme.Initialize();acme.maps.Initialize();if(!google.maps.BrowserIsCompatible())
{mapElement.innerHTML='Sorry, your browser is not compatible with Google Maps.';return;}
map=new google.maps.Map2(mapElement,{draggableCursor:'default',backgroundColor:'#99cc99'});map.addControl(new google.maps.LargeMapControl());map.addControl(new google.maps.ScaleControl());map.setCenter(new google.maps.LatLng(37.80,-122.20),10);google.maps.Event.addListener(map,'infowindowclose',PopDown);var adUnit=new google.maps.AdsManager(map,"pub-5759188606642566",{channel:'0949180036',style:'adunit',maxAdsOnMap:1,position:new google.maps.ControlPosition(google.maps.ANCHOR_TOP_RIGHT,new google.maps.Size(7,7))});adUnit.enable();stationIcon=new google.maps.Icon();stationIcon.image='images/station.png';stationIcon.iconSize=new google.maps.Size(11,11);stationIcon.iconAnchor=new google.maps.Point(5,5);stationIcon.infoWindowAnchor=new google.maps.Point(3,7);transferIcon=new google.maps.Icon();transferIcon.image='images/transfer.png';transferIcon.iconSize=new google.maps.Size(15,15);transferIcon.iconAnchor=new google.maps.Point(7,7);transferIcon.infoWindowAnchor=new google.maps.Point(6,7);var size=new google.maps.Size(20,20);var anchor=new google.maps.Point(10,10);for(a=0;a<=360;a+=5)
{redTrainIcons[a]=new google.maps.Icon();redTrainIcons[a].image='images/red_train_'+ZeroPad(a)+'.png';redTrainIcons[a].iconSize=size;redTrainIcons[a].iconAnchor=anchor;greenTrainIcons[a]=new google.maps.Icon();greenTrainIcons[a].image='images/green_train_'+ZeroPad(a)+'.png';greenTrainIcons[a].iconSize=size;greenTrainIcons[a].iconAnchor=anchor;blueTrainIcons[a]=new google.maps.Icon();blueTrainIcons[a].image='images/blue_train_'+ZeroPad(a)+'.png';blueTrainIcons[a].iconSize=size;blueTrainIcons[a].iconAnchor=anchor;yellowTrainIcons[a]=new google.maps.Icon();yellowTrainIcons[a].image='images/yellow_train_'+ZeroPad(a)+'.png';yellowTrainIcons[a].iconSize=size;yellowTrainIcons[a].iconAnchor=anchor;orangeTrainIcons[a]=new google.maps.Icon();orangeTrainIcons[a].image='images/orange_train_'+ZeroPad(a)+'.png';orangeTrainIcons[a].iconSize=size;orangeTrainIcons[a].iconAnchor=anchor;}
GtfsGetFile('stops.txt',StopsFetched);}
function Unload()
{if(minuteTimeout!=null)
{clearTimeout(minuteTimeout);minuteTimeout=null;}
if(secondTimeout!=null)
{clearTimeout(secondTimeout);secondTimeout=null;}
google.maps.Unload();}
function StopsFetched(_stops)
{stops=_stops;stops=Associatize(stops,'stop_id');for(var i in stops)
{var stop=stops[i];stop.stop_lat=+stop.stop_lat;stop.stop_lon=+stop.stop_lon;stop.latlng=new google.maps.LatLng(stop.stop_lat,stop.stop_lon);var xfer=(i=='BALB'||i=='BAYF'||i=='MCAR'||i=='12TH');stop.marker=new google.maps.Marker(stop.latlng,{icon:xfer?transferIcon:stationIcon,title:stop.stop_name,zIndexProcess:StopZIndex});stop.marker.name=stop.stop_name;map.addOverlay(stop.marker);google.maps.Event.addListener(stop.marker,'click',MakeCaller(PopUp,stop.stop_id));}
GtfsGetFile('route_stops.txt',RouteStopsFetched);}
function StopZIndex(a,b)
{return 20;}
function TrainZIndex(a,b)
{return 10;}
function RouteStopsFetched(_routeStops)
{routeStops=_routeStops;routeStops=Associatize(routeStops,'route_id');for(var i in routeStops)
{routeStop=routeStops[i];var stop_ids=Trim(routeStop.stop_ids).split(' ');routeStop.route=[];for(var j in stop_ids)
routeStop.route.push({stop_id:stop_ids[j]});var latlngs=[];for(var j in routeStop.route)
latlngs.push(stops[routeStop.route[j].stop_id].latlng);map.addOverlay(new google.maps.Polyline(latlngs,'#000000',8,1.0));}
GtfsGetFile('segment_secs.txt',SegmentSecsFetched);}
function SegmentSecsFetched(_segmentSecs)
{segmentSecs=[];for(var i in _segmentSecs)
{var segmentSec=_segmentSecs[i];segmentSec.secs=+segmentSec.secs;segmentSec.direction=acme.maps.Bearing(stops[segmentSec.from_stop_id].latlng,stops[segmentSec.to_stop_id].latlng);if(segmentSecs[segmentSec.from_stop_id]==null)
segmentSecs[segmentSec.from_stop_id]=[];segmentSecs[segmentSec.from_stop_id][segmentSec.to_stop_id]=segmentSec;}
for(var i in routeStops)
{var routeStop=routeStops[i];routeStop.route[0].secs=0;for(var j=1;j<routeStop.route.length;++j)
{routeStop.route[j].secs=routeStop.route[j-1].secs+segmentSecs[routeStop.route[j-1].stop_id][routeStop.route[j].stop_id].secs;}}
for(var i in routeStops)
{var routeStop=routeStops[i];routeStop.secsSpots=[];var secs=0;var route=routeStop.route;for(var j=0;j<route.length-1;++j)
{var from_stop_id=route[j].stop_id;var fromLatlng=stops[from_stop_id].latlng;var fromLat=fromLatlng.lat();var fromLng=fromLatlng.lng();var to_stop_id=route[j+1].stop_id;var toLatlng=stops[to_stop_id].latlng;var toLat=toLatlng.lat();var toLng=toLatlng.lng();var deltaLat=toLat-fromLat;var deltaLng=toLng-fromLng;var segmentSec=segmentSecs[from_stop_id][to_stop_id];for(var k=0;k<segmentSec.secs;++k)
{var a=k/segmentSec.secs;var lat=deltaLat*a+fromLat;var lng=deltaLng*a+fromLng
var latlng=new google.maps.LatLng(lat,lng);routeStop.secsSpots[secs]={latlng:latlng,direction:segmentSec.direction};++secs;}}}
EveryMinute();EverySecond();}
var minuteTimeout=null;function EveryMinute()
{FetchEtas();minuteTimeout=setTimeout(EveryMinute,60000);}
var secondTimeout=null;var prevMsecs=null;var remainderMsecs=0;function EverySecond()
{var currMsecs=(new Date()).getTime();if(prevMsecs!=null)
{var deltaMsecs=currMsecs-prevMsecs;remainderMsecs+=deltaMsecs;if(remainderMsecs>=1000)
{var remainderSecs=Math.floor(remainderMsecs/1000);remainderMsecs-=remainderSecs*1000;MoveTrains(remainderSecs);ShowTrains();}}
prevMsecs=currMsecs;secondTimeout=setTimeout(EverySecond,900);}
function FetchEtas()
{HttpGet('get_etas.cgi',EtasRequestChecker);}
function EtasRequestChecker(request)
{for(var i in stops)
stops[i].etas=[];var xmlDoc=request.responseXML.documentElement;var stationElements=xmlDoc.getElementsByTagName('station');for(var i=0;i<stationElements.length;++i)
{var abbrElement=FindChildNamed(stationElements[i],'abbr');var stop_id=GetXmlText(abbrElement);if(stop_id=='ASHB')
stop_id='ASBY';var etaElements=stationElements[i].getElementsByTagName('eta');for(var j=0;j<etaElements.length;++j)
{var eta={};var destinationElement=FindChildNamed(etaElements[j],'destination');eta.destination=GetXmlText(destinationElement);var estimateElement=FindChildNamed(etaElements[j],'estimate');eta.times=ArrayMap(Trim,GetXmlText(estimateElement).split(','));for(k in eta.times)
if(eta.times[k]=='Arrived')
eta.times[k]=0;else
eta.times[k]=eta.times[k].split(' ')[0]*60;stops[stop_id].etas.push(eta);}}
RePop();FindTrains();}
var destToRouteId=[];destToRouteId['Richmond']='03';destToRouteId['Pittsburg/Bay Point']='02';destToRouteId['SF Airport']='01';destToRouteId['Fremont']='04';destToRouteId['Millbrae']='07';destToRouteId['Dublin/Pleasanton']='12';destToRouteId['Daly City']='07';destToRouteId['SFO/Millbrae']='01';destToRouteId['Concord']='02';destToRouteId['24th Street']='01';destToRouteId['Montgomery']='01';destToRouteId['Pleasant Hill']='02';destToRouteId['South Hayward']='04';destToRouteId['Bay Fair']='04';destToRouteId['Colma']='01';destToRouteId['Coliseum']='04';var trains=[];function FindTrains()
{var oldTrains=trains;trains=[];for(var i in stops)
{var stop=stops[i];for(var j in stop.etas)
{var eta=stop.etas[j];var destination=eta.destination;var route_id=destToRouteId[destination];var routeStop=routeStops[route_id];var route=routeStop.route;var headsign=routeStop.trip_headsign;var color=routeStop.color;for(var k in route)
if(route[k].stop_id==i)
{var secs=route[k].secs;var times=eta.times;for(var l in times)
{var train={route_id:route_id,headsign:headsign,color:color,secs:secs-times[l]};var found=false;for(var m in trains)
{var otherTrain=trains[m];if(train.route_id==otherTrain.route_id&&Math.abs(train.secs-otherTrain.secs)<180)
{found=true;break;}}
if(!found)
{PlaceTrain(train);if(train.latlng==null)
{Log('position not found - i: '+i);continue;}
trains.push(train);}}
break;}}}
countElement.innerHTML=trains.length+' trains running';for(var i in oldTrains)
map.removeOverlay(oldTrains[i].marker);ShowTrains();}
function MoveTrains(deltaSecs)
{for(var i in trains)
{var train=trains[i];train.secs+=deltaSecs;PlaceTrain(train);}}
function PlaceTrain(train)
{var secs=train.secs;var routeStop=routeStops[train.route_id];if(train.secs<0)
secs=-secs;else if(secs>=routeStop.secsSpots.length)
secs=routeStop.secsSpots[routeStop.secsSpots.length-1]-secs;var secsSpot=routeStop.secsSpots[secs];train.latlng=secsSpot.latlng;train.direction=secsSpot.direction;}
function ShowTrains()
{for(var i in trains)
{var train=trains[i];var icons=allIcons[train.color];var icon=icons[RoundFive(train.direction)];if(train.marker==null)
{train.marker=new google.maps.Marker(train.latlng,{icon:icon,clickable:false,zIndexProcess:TrainZIndex});map.addOverlay(train.marker);}
else
{if(train.marker.icon==icon)
train.marker.setLatLng(train.latlng)
else
{map.removeOverlay(train.marker);train.marker=new google.maps.Marker(train.latlng,{icon:icon,clickable:false,zIndexProcess:TrainZIndex});map.addOverlay(train.marker);}}}}
var cookieName='bartStation';var lastStation=GetCookie(cookieName);function PopUp(stop_id)
{var stop=stops[stop_id];var html;var name=stop.stop_name;html='<b>'+name+'</b>'
html+='<br /><br />';if(stop.etas.length==0)
html+='No ETAs listed.<br />';else
for(var i in stop.etas)
{html+=stop.etas[i].destination+': ';for(j in stop.etas[i].times)
{if(j!=0)
html+=', ';var secs=stop.etas[i].times[j];if(secs==0)
html+='Arrived';else
html+=secs/60+' min';}
html+='<br />';}
map.closeInfoWindow();stop.marker.openInfoWindowHtml(html,{maxWidth:300});lastStation=stop_id;SaveCookie(cookieName,lastStation);}
function RePop()
{if(lastStation)
PopUp(lastStation);}
function PopDown()
{lastStation=null;ClearCookie(cookieName);}
function ZeroPad(n)
{if(n<=9)
return'00'+n;else if(n<=99)
return'0'+n;else
return n;}
function RoundFive(a)
{return Math.round(a/5)*5;}
var gtfsCurrentCallback;function GtfsGetFile(url,callback)
{gtfsCurrentCallback=callback;HttpGet(url,GtfsParseFile);}
function GtfsParseFile(request)
{var text=request.responseText;var lines=text.split('\n');var fieldNames;var table=[];for(var i in lines)
{var line=lines[i];if(line.length>0)
{var fields=line.split(',');for(var j in fields)
fields[j]=GtfsDeQuote(fields[j]);if(i==0)
fieldNames=fields;else
{var row={};for(var j in fields)
row[fieldNames[j]]=fields[j];table.push(row);}}}
gtfsCurrentCallback(table);}
function GtfsDeQuote(field)
{return field;}