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appcache-twofeatureslayer-noedit.html
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<!DOCTYPE html>
<html manifest="appcache-features.appcache">
<!--<html>-->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!--The viewport meta tag is used to improve the presentation and behavior of the samples
on iOS devices-->
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<!--
This sample demonstrates using an application manifest to store features and tiles locally with a custom-built
editor widget. If you are planning on using one of Esri's pre-built widgets such as the AttributeInspector
then you'll need to use a different pattern for reconstituting the feature layer. See the How-To for more details:
https://github.com/Esri/offline-editor-js/blob/master/doc/howtouseeditlibrary.md
The use cases for using this sample are to ensure you can reload and restart you application
while it is offline and then continue working.
It is strongly recommended that you use your own optimized build of the ArcGIS API for JavaScript
using the Web Optimizer: http://jso.arcgis.com/. You can reference the CDN or host it on your
own web server.
Here is the list of contents for the optimized ArcGIS JS API file used in this sample app:
https://github.com/Esri/offline-editor-js/issues/284
Use the Grunt task in the /samples directory to help generate the manifest file. There is manual
work involved in determining which files need to go into the manifest. The included manifest
file should work with this sample to give you an idea of what goes into the manifest.
A few things to know about manifest files:
- You cannot load an online url that has a redirect.
- If there is an error encountered, the manifest file will stop loading
- The /utils/appCacheManager.js library will auto detect if the manifest changed and
ask if you want to reload the application.
HINT: When testing be sure you allow for browser caching. If you are using Chrome make sure you have NOT
checked Network Tab > Disable cache.
-->
<title>AppCache Tiles and Features</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<link rel="stylesheet" href="../samples/widgets/modal/css/modal-popup.css">
<link rel="stylesheet" href="//js.arcgis.com/3.14/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="//js.arcgis.com/3.14/esri/css/esri.css">
<link rel="stylesheet" href="//esri.github.io/bootstrap-map-js/src/css/bootstrapmap.css">
<script>
// DO NOT DELETE!
// Listen for application cache update events
// We want to place this as early in the application life-cycle as possible!
window.addEventListener('load', function(evt) {
window.applicationCache.addEventListener('updateready', function(evt) {
if (window.applicationCache.status == window.applicationCache.UPDATEREADY) {
// Browser downloaded a new app cache.
if (confirm('A new version of this cache is available.')) {
window.location.reload();
console.log("App cache reloaded");
}
} else {
// Manifest didn't changed. Nothing new to server.
console.log("App cache no change");
}
}, false);
}, false);
// Reserved for debugging on Safari desktop and mobile
// Uncomment when doing any debugging on Safari 8 (or previous versions that support App Cache).
// To delete the application cache file on Safari refer to the following url then close/restart browser:
// http://stackoverflow.com/questions/5615266/how-do-you-clear-the-offline-cache-for-web-apps-in-safari
// function logEvent(event) {
// console.log("Checking for Application Cache Event: " + event.type);
// }
//
// window.applicationCache.addEventListener('checking',logEvent,false);
// window.applicationCache.addEventListener('noupdate',logEvent,false);
// window.applicationCache.addEventListener('downloading',logEvent,false);
// window.applicationCache.addEventListener('cached',logEvent,false);
// window.applicationCache.addEventListener('updateready',logEvent,false);
// window.applicationCache.addEventListener('obsolete',logEvent,false);
//
// // If you need to catch AppCache errors as early as possible to troubleshoot errors.
// // You should delete this for production use.
// window.applicationCache.addEventListener("error",function(err){
// console.log("ApplicationCache listener: " + err.toString() + ", " + JSON.stringify(err));
// if (confirm('There was a problem setting this app up for offline. Reload?')) {
// window.location.reload();
// console.log("App cache reloaded");
// }
// },false);
</script>
<style>
#mapDiv {
min-height: 400px;
max-height: 1000px;
}
body {
background-color: #ffffff;
overflow: hidden;
font-family: "Trebuchet MS";
}
.floatRight { float: right;}
.container { padding: 20px; width: 100%;}
</style>
<script src="//github.hubspot.com/offline/offline.min.js"></script>
<script>
// This options sets up an image that the offline status detection library
// will use to ping to see if app is online or offline.
Offline.options = {
checks: {
image: {
url: function() {
return 'http://esri.github.io/offline-editor-js/tiny-image.png?_=' + (Math.floor(Math.random() * 1000000000));
}
},
active: 'image'
}
}
var locationPath = location.pathname.replace(/\/[^/]+$/, "");
var dojoConfig = {
paths: {
vendor: locationPath + "/../vendor",
utils: locationPath + "/../utils",
widgets: locationPath + "/widgets"
}
}
</script>
<!--
Include a reference to IndexedDBShim for library to work on Safari 7.x.
May not be required for all Safari browsers.
-->
<!--<script src="//nparashuram.com/IndexedDBShim/dist/indexeddbshim.min.js"></script>-->
<!--
This is a locally hosted optimized build of the ArcGIS JS API.
The optimizer creates a single JavaScript file that you can host yourself.
To create your own optimized build go to: http://http://jso.arcgis.com/
-->
<script src="../samples/jsolib/dojo.js" data-dojo-config="async: true"></script>
</head>
<body>
<!-- Our buttons and online/offline indicator -->
<div class="container">
<div class="row">
<div class="col-xs-10">
<div class="form form-group btn-group" data-toggle="buttons">
<button class="btn btn-primary" id="btn-get-tiles">1. Download Tiles</button>
<button class="btn btn-primary" id="btn-online-offline">2. Go Offline</button>
</div>
</div>
<div class="col-xs-2">
<!-- this indicates whether app is offline (down) or online (up) -->
<button id="btn-state" class="btn btn-success btn-large floatRight">
<span id="state-span" class="glyphicon glyphicon-link"> Up</span>
</button>
</div>
</div>
<div class="row">
<div class="col-xs-12">
<div id="mapDiv"></div>
</div>
</div>
</div>
<script>
require(["esri/map",
"esri/layers/FeatureLayer",
"esri/renderers/SimpleRenderer","esri/symbols/SimpleMarkerSymbol",
"esri/Color",
"esri/tasks/query",
"dojo/on","dojo/promise/all", "dojo/_base/Deferred",
"esri/graphic","esri/geometry/Extent", "esri/SpatialReference",
"//esri.github.io/bootstrap-map-js/src/js/bootstrapmap.js",
"../dist/offline-tiles-advanced-src.js",
"../dist/offline-edit-advanced-src.js",
"dojo/domReady!"],
function(Map,FeatureLayer,
SimpleRenderer,SimpleMarkerSymbol,Color,Query,
on,all,Deferred,Graphic,Extent,SpatialReference,BootstrapMap) {
var map = null;
var _isOnline = true;
var defaultSymbol, bStationSymbol;
// Variables for editing handling
var busStopFeatureLayer = null, offlineEdit = {};
var bicycleStationFeatureLayer = null;
var imgOfflineIndicator = document.getElementById("state-span");
var btnState = document.getElementById("btn-state");
// Variables for handling tiles
var tileLayer;
var _currentExtent = null;
var _wantToCancel;
var globalState = {};
var btnGetTiles = document.getElementById("btn-get-tiles");
var btnOnlineOffline = document.getElementById("btn-online-offline");
// Important settings for determining which tile layers gets stored for offline use.
var minZoomAdjust = -1, maxZoomAdjust = 1;
var EXTENT_BUFFER = 0; //buffers the map extent in meters
defaultSymbol= new SimpleMarkerSymbol().setStyle(
SimpleMarkerSymbol.STYLE_DIAMOND).setColor(
new Color([255,0,0,0.5])).setSize(20);
bStationSymbol= new SimpleMarkerSymbol().setStyle(
SimpleMarkerSymbol.STYLE_CIRCLE).setColor(
new Color([13,83,202,0.5])).setSize(20);
/**
* NOTE: This is the entry point into the application. The very first thing
* we need to do is check if the application is online or offline.
*
* There have been a few bugs in the offline detection library (offline.min.js)
* This is a utility check to 100% validate if the application is online or
* offline prior to launching any map functionality.
*/
validateOnline(function(result) {
if(result) {
_isOnline = true;
setUIOnline();
}
else {
_isOnline = false;
setUIOffline();
}
startMap();
});
/**
* We run this code both online and offline.
*/
function startMap() {
//
// Extend the feature layer with offline capabilities.
//
tileLayer = new O.esri.Tiles.OfflineTilesAdvanced("http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer",function(evt){
console.log("Tile Layer initialized for offline. App state is: " + Offline.state);
},_isOnline);
// We don't need a proxy. All ArcGIS Online Service are CORS enabled.
tileLayer.offline.proxyPath = null;
// We are using Esri bootstrap-map-js to create a responsive mapping app
map = BootstrapMap.create("mapDiv",{
center: [-104.99,39.75], // long, lat
zoom: 17,
sliderStyle: "small"
});
map.on("load",function(evt) {
_currentExtent = evt.map.extent;
});
// Add our offline enabled tile layer to the map
map.addLayer(tileLayer);
if(!_isOnline){
loadFeatureLayerOffline(function(success) {
if(success) {
console.log("DONE!");
}
else {
alert("There was a problem initializing the map for offline.");
}
});
}
else {
initializeFeaturesLayersOnline(function(){
console.log("online layers init!");
})
}
}
function initializeFeaturesLayersOnline(callback){
var promises = [];
var deferred1 = new Deferred();
var deferred2 = new Deferred();
var listener1, listener2;
/////////////////////////
// Our first layer
/////////////////////////
// Initialize our feature layer like we normally would
busStopFeatureLayer = new FeatureLayer("http://services1.arcgis.com/M8KJPUwAXP8jhtnM/arcgis/rest/services/Denver_Bus_Stops/FeatureServer/0", {
mode: FeatureLayer.MODE_SNAPSHOT,
outFields: ["GlobalID","BSID","ROUTES","STOPNAME"]
});
busStopFeatureLayer.setRenderer(new SimpleRenderer(defaultSymbol));
listener1 = busStopFeatureLayer.on("update-end",function(event){
listener1.remove();
if(!offlineEdit.hasOwnProperty("ONLINE")){
initOfflineEdits();
}
offlineEdit.extend(busStopFeatureLayer,function(result, error) {
if(result){
deferred1.resolve(true);
map.addLayer(bicycleStationFeatureLayer);
callback(true);
}
});
});
/////////////////////////
// Our second layer
/////////////////////////
bicycleStationFeatureLayer = new FeatureLayer("http://services1.arcgis.com/M8KJPUwAXP8jhtnM/ArcGIS/rest/services/b_cycle_stations/FeatureServer/0", {
mode: FeatureLayer.MODE_SNAPSHOT,
outFields: ["GlobalID","STATION_NAME","STATION_ADDRESS","NUM_DOCKS"]
});
bicycleStationFeatureLayer.setRenderer(new SimpleRenderer(bStationSymbol));
listener2 = bicycleStationFeatureLayer.on("update-end",function(event){
listener2.remove();
if(!offlineEdit.hasOwnProperty("ONLINE")){
initOfflineEdits();
}
offlineEdit.extend(bicycleStationFeatureLayer,function(result, error) {
if(result){
deferred2.resolve(true);
}
});
});
promises.push(deferred1);
promises.push(deferred2);
map.addLayer(busStopFeatureLayer);
all(promises).then(function(result){
console.log("All results back!");
// This sets listeners to detect if the app goes online or offline.
Offline.on('up', goOnline);
Offline.on('down', goOffline);
if(_isOnline){
on(btnGetTiles,"click",downloadTiles);
on(btnOnlineOffline, 'click', goOnlineOffline);
// We don't have any stored edits
// This is just an example of what you would do if you had stored edits!
console.log("Application is online...attempting to send any stored edits.");
offlineEdit.goOnline(function(result){
if(!result.success){
alert("There was a problem when attempting to go back online.");
}
else {
console.log("OfflineEditAdvanced is online");
}
});
}
else {
offlineEdit.goOffline();
}
callback();
})
}
/**
* If we are offline then the attempt to add the feature layer will fail. The error
* will show up in the 'update-end' event.
* Having that error is okay because we want to explicitly control the order in which events happen.
* In production usage it would be a best practices to check any other errors and handle them appropriately.
*/
function initFeatureUpdateEndListener() {
//**************************************************
//
// This is where we detect an offline condition
// within the lifecycle of the "mapping" application.
// If we are offline then run our offline
// specific code for reconstituting our map.
//
//**************************************************
// If app is online then we ONLY need to extend the feature layer.
if(_isOnline){
initializeFeaturesLayersOnline();
}
// If the app is offline then we need to retrieve the dataStore from OfflineEditAdvanced
// and then extend the feature layer using that information.
else {
loadFeatureLayerOffline(function(success) {
if(success) {
initializeFeaturesLayersOnline();
}
else {
alert("There was a problem initializing the map for offline.");
}
});
}
}
/**
* Load the feature while offline using information stored in database
*/
function loadFeatureLayerOffline(callback) {
initOfflineEdits();
var promises = [];
offlineEdit.getFeatureCollections(function(success,dataStore) {
if(success){
var deferred1 = new Deferred();
var deferred2 = new Deferred();
promises.push(deferred1);
promises.push(deferred2);
var _listener1, _listener2;
//////////////////////////////////////
// bus stops
//////////////////////////////////////
busStopFeatureLayer = new FeatureLayer(dataStore.featureCollections[0].featureLayerCollection);
if(busStopFeatureLayer.url == null){
busStopFeatureLayer.url = dataStore.featureCollections[0].featureLayerUrl;
}
// Set the graphic symbols to red diamond to make it easy to click on them
// on a mobile device.
busStopFeatureLayer.setRenderer(new SimpleRenderer(defaultSymbol));
busStopFeatureLayer.on("error",function(err){
console.log("ERROR " + err);
});
_listener1 = busStopFeatureLayer.on("update",function(evt){
_listener1.remove();
offlineEdit.extend(busStopFeatureLayer,function(success, error){
if(success){
console.log("busStopFeatureLayer successfully extended offline");
deferred1.resolve(true);
}
else {
console.log("busStopFeatureLayer Error attempting to extend it offline");
deferred1.reject(false);
}
});
});
map.addLayer(busStopFeatureLayer);
//////////////////////////////////////
// Bicycle stations
//////////////////////////////////////
bicycleStationFeatureLayer = new FeatureLayer(dataStore.featureCollections[1].featureLayerCollection);
if(bicycleStationFeatureLayer.url == null){
bicycleStationFeatureLayer.url = dataStore.featureCollections[1].featureLayerUrl;
}
// Set the graphic symbols to red diamond to make it easy to click on them
// on a mobile device.
bicycleStationFeatureLayer.setRenderer(new SimpleRenderer(bStationSymbol));
bicycleStationFeatureLayer.on("error",function(err){
console.log("ERROR " + err);
});
_listener2 = bicycleStationFeatureLayer.on("update",function(evt){
_listener2.remove();
offlineEdit.extend(bicycleStationFeatureLayer,function(success, error){
if(success){
console.log("bicycleStationFeatureLayer successfully extended offline");
deferred2.resolve(true);
}
else {
console.log("bicycleStationFeatureLayer Error attempting to extend it offline");
deferred2.reject(false);
}
});
});
map.addLayer(bicycleStationFeatureLayer);
all(promises).then(function(result){
console.log("Feature has been added back to the map while offline.");
on(btnGetTiles,"click",downloadTiles);
on(btnOnlineOffline, 'click', goOnlineOffline);
callback(true);
});
}
else{
alert("There was a problem retrieving feature layer options object. " + dataStore);
callback(false);
}
})
}
/**
* **********************************************
* FEATURE LAYER MANAGEMENT CODE
* **********************************************
*/
function initOfflineEdits() {
console.log("Initializing OfflineEditAdvanced");
offlineEdit = new O.esri.Edit.OfflineEditAdvanced();
// IMPORTANT!!!
// This tells the database which graphic.attribute property to use as a unique identifier
// You can look this information up in your feature service directory under the "Fields" category.
// Example: http://services1.arcgis.com/M8KJPUwAXP8jhtnM/arcgis/rest/services/Denver_Bus_Stops/FeatureServer/0
offlineEdit.DB_UID = "FID";
// We want the library to automatically create the offline featureCollection for each layer
offlineEdit.ENABLE_FEATURECOLLECTION = true;
// IMPORTANT!!!
// A proxy page may be required to upload attachments.
// If you are using a CORS enabled feature service you can ignore this.
// If your feature service is not CORS-enabled then you will need to configure this.
// Refer to "Using the Proxy Page" for more information: https://developers.arcgis.com/en/javascript/jshelp/ags_proxy.html
offlineEdit.proxyPath = null;
}
/**
* ************************************
* TILE MANAGEMENT CODE
* ************************************
*/
/**
* Manually starts the process to download and store tiles
* in the local database
*/
function downloadTiles() {
tileLayer.deleteAllTiles(function(success,err) {
if(!success) {
alert("There was a problem deleting the tile cache");
}
else {
console.log("success deleting tile cache");
if( globalState.downloadState == 'downloading')
{
console.log("cancel!");
_wantToCancel = true;
btnGetTiles.innerHTML = "cancelling..";
}
else
{
var zoom = tileLayer.getMinMaxLOD(minZoomAdjust,maxZoomAdjust);
var extent = tileLayer.getExtentBuffer(EXTENT_BUFFER,_currentExtent);
_wantToCancel = false;
tileLayer.prepareForOffline(zoom.min, zoom.max, extent, reportProgress.bind(this));
globalState.downloadState = 'downloading';
}
}
}.bind(this))
}
/**
* Reports the process while downloading tiles.
*/
function reportProgress(progress) {
console.log("downloading tiles...");
if(progress.hasOwnProperty("countNow")){
var percent = Math.floor(progress.countNow / progress.countMax * 100);
btnGetTiles.innerHTML = 'Saving to phone ' + percent + "% - Tap to Cancel";
}
if( progress.finishedDownloading ) {
btnGetTiles.innerHTML = "Saving to phone 100% - Tap to Cancel";
updateOfflineUsage();
// updateFeatureLayerJSON();
if( progress.cancelRequested ) {
globalState.downloadState = 'cancelled';
alert("Tile download was cancelled");
}
else {
globalState.downloadState = 'downloaded';
alert("Tile download complete");
}
btnGetTiles.innerHTML = '1. Download Tiles';
}
return _wantToCancel; //determines if a cancel request has been issued
}
/**
* ************************************
* HANDLE GOING ONLINE/OFFLINE
* ************************************
*/
/**
* Forces OfflineEditAdvanced to go online.
* When invoking featureLayer.goOnline() we force library to sync any edits that were
* stored while offline.
*/
function goOnline() {
console.log("Going online...");
updateOfflineUsage();
if(typeof tileLayer != "undefined") tileLayer.goOnline();
}
/**
* Forces OfflineEditAdvanced offline
*/
function goOffline() {
console.log("Going offline...");
setUIOffline();
if(typeof tileLayer != "undefined") tileLayer.goOffline();
}
/**
* Toggles OfflineEditAdvanced online/offline
*/
function goOnlineOffline() {
if(offlineEdit.getOnlineStatus() == offlineEdit.ONLINE){
goOffline();
}
else{
goOnline();
}
}
function setUIOnline() {
btnOnlineOffline.innerHTML = "2. Go Offline";
imgOfflineIndicator.className = "glyphicon glyphicon-link";
imgOfflineIndicator.innerHTML = " Up";
btnState.className = "btn btn-success btn-large floatRight";
}
function setUIOffline() {
btnOnlineOffline.innerHTML = "2. Go Online";
imgOfflineIndicator.className = "glyphicon glyphicon-thumbs-down";
imgOfflineIndicator.innerHTML = " Down";
btnState.className = "btn btn-danger btn-large floatRight";
}
/**
* For internal use - detecting amount of storage used and number of tiles stored.
*/
function updateOfflineUsage() {
tileLayer.offline.store.usedSpace(function(result,err){
if(result != null) {
console.log( "DB Tile count: " + result.tileCount + ", DB Bytes: " + result.sizeBytes);
}
else {
console.log("DB Tile count: " + count + ", DB Bytes: Error");
}
})
}
/**
* Attempts a manual http request to verify if app is online or offline.
* Use this in conjunction with the offline checker library: offline.min.js
* @param callback
*/
function validateOnline(callback) {
var req = new XMLHttpRequest();
req.open("GET", "http://esri.github.io/offline-editor-js/samples/images/blue-pin.png?" + (Math.floor(Math.random() * 1000000000)), true);
req.onload = function() {
if( req.status === 200 && req.responseText !== "") {
req = null;
callback(true);
}
else {
console.log("verifyOffline failed");
req = null;
callback(false);
}
};
req.onerror = function(e) {
console.log("appcache-features.html verifyOnline failed: " + e);
callback(false);
};
req.send(null);
}
});
</script>
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</html>