distancefinder/javascript.js

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JavaScript
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var map = null;
var geocoder = null;
var nbAddressesProcessed = 0;
var requestDelay = 500;
var maxSliceSize = 20;
var slice = [];
var distanceNA = 'N/A';
var isStopped = false;
var statusDiv = null;
var markers = [];
var polylines = [];
var LOCATIONS = {
index: -1,
elements: [],
processNext : function(noIncrement){
if(typeof noIncrement=='undefined'){
this.index++;
}
if(this.elements.length && this.index < this.elements.length){
this.processCallback(this);
}else{
this.endCallback(this);
}
},
set: function(property,value){
this.elements[this.index][property] = value;
},
get : function(){
return this.elements[this.index];
}
};
function initGoogle(){
var elem = document.getElementById('map');
var options = {
zoom: 2,
center: new google.maps.LatLng(51.500152,-0.126236),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(elem, options);
geocoder = new google.maps.Geocoder();
statusDiv = document.getElementById('search-status').getElementsByTagName('div')[0];
}
function geolocateLocation1(callback){
if(LOCATION1.id){
LOCATION1.position = new google.maps.LatLng(LOCATION1.lat, LOCATION1.lng);
callback();
return;
}
geocoder.geocode({'address': LOCATION1.adr}, function(results, status){
if(status != google.maps.GeocoderStatus.OK){
alert('The address ['+LOCATION1.adr+'] has caused an error.\nGoogle Geocoder Status: '+status);
return;
}
var position = results[0].geometry.location;
LOCATION1.lat = position.lat();
LOCATION1.lng = position.lng();
jQuery.post('save-location1.php', {location: LOCATION1}, function(locationId){
if(locationId){
LOCATION1.id = locationId;
LOCATION1.position = position;
callback();
}else{
alert('The address ['+LOCATION1.adr+'] has caused an error.\nThe application could not save the location. '+locationId);
}
});
});
}
function geolocateLocationsAll(){
jQuery.get('get-locations.php?geosrc='+geosrc+'&locationId='+LOCATION1.id, function(json){
jQuery('#btnStop').show();
LOCATIONS.processCallback = geolocateLocationN;
LOCATIONS.endCallback = geolocateLocationsEnd;
LOCATIONS.elements = eval(json);
LOCATIONS.processNext();
});
}
function saveLocationOnServer(location, delay) {
nbAddressesProcessed++;
showDistance(location);
slice.push(location);
if(slice.length>=maxSliceSize){
saveSlice();
setTimeout(clearMarkers, 500);
setTimeout(function(){ LOCATIONS.processNext(); }, 1000);
}else{
setTimeout(function(){ LOCATIONS.processNext(); }, delay);
}
}
function geolocateLocationN(){
if(isStopped){
doAbort();
return;
}
var location = LOCATIONS.get();
if(location.dst){
saveLocationOnServer(location, 0);
return;
}
if(location.id){
var position = new google.maps.LatLng(location.lat, location.lng);
location.dst = google.maps.geometry.spherical.computeDistanceBetween(LOCATION1.position, position);
saveLocationOnServer(location, 0);
return;
}
geocoder.geocode({'address': location.adr}, function(results, status){
if(status == google.maps.GeocoderStatus.OVER_QUERY_LIMIT){
setTimeout(function(){
LOCATIONS.processNext(false);
}, 5000);
return;
}
if(status != google.maps.GeocoderStatus.OK){
$('#map').css('opacity','0.3');
$('#options').show(666);
$('#options h3 span').html(location.adr);
$('#options input').val(location.adr);
jQuery('#btnStop').hide();
return;
}
var position = results[0].geometry.location;
location.lat = position.lat();
location.lng = position.lng();
location.dst = google.maps.geometry.spherical.computeDistanceBetween(LOCATION1.position, position);
saveLocationOnServer(location, requestDelay);
});
}
function geolocateLocationsEnd(){
setTimeout(saveSlice, 1000);
jQuery('#search-complete').show();
jQuery('#btnStop').hide();
}
function showDistance(location){
var pos1 = LOCATION1.position;
var pos2 = new google.maps.LatLng(location.lat, location.lng);
var marker2 = new google.maps.Marker({position:pos2});
var polyline = new google.maps.Polyline({path: [pos1,pos2], strokeColor: "#FF0000", strokeOpacity: 1.0,strokeWeight: 1});
marker2.setMap(map);
polyline.setMap(map);
showStatus(location.adr, location.dst);
if(!markers.length){
var marker1 = new google.maps.Marker({position:pos1});
marker1.setMap(map);
markers.push(marker1);
}
markers.push(marker2);
polylines.push(polyline);
}
function saveSlice(){
if(slice.length){
jQuery.post('save-locations.php?locationId='+LOCATION1.id, {locations:slice});
slice = [];
}
}
function doResume() {
unhideMap();
setTimeout(function(){
LOCATIONS.set('adr', $('#options input').val());
LOCATIONS.processNext(false);
},1000);
}
function doSkip() {
nbAddressesProcessed++;
unhideMap();
showStatus($('#options input').val(), distanceNA);
LOCATIONS.set('dst', distanceNA);
slice.push(LOCATIONS.get());
LOCATIONS.processNext();
}
function doAbort() {
unhideMap();
showStatus($('#options input').val(), distanceNA);
geolocateLocationsEnd();
}
function showStatus(address, distance) {
if(distance!=distanceNA){
distance = Math.ceil(distance/1000);
}
var str = 'Addresses processed: '+nbAddressesProcessed+' / '+LOCATIONS.elements.length;
str += '<br>Last: '+distance+' km to '+address;
statusDiv.innerHTML = str;
}
function unhideMap() {
$('#map').css('opacity','1');
$('#options').hide(500);
jQuery('#btnStop').show();
}
function clearMarkers() {
for (var i = 0; i < markers.length; i++) {
markers[i].setMap(null);
}
for (var i = 0; i < polylines.length; i++) {
polylines[i].setMap(null);
}
polylines = [];
markers = [];
}