Add geocode cache (close #30)

www/assets/js/packages.js

@@ -290,6 +290,28 @@ function addPackageByAddress(number, street, citystate, type, callback) {
     var deadline = false;
 
     var ajaxlookup = function () {
+        var geocodecache = localStorage.getItem("geocode_cache");
+        if (geocodecache == null) {
+            geocodecache = "{}";
+            localStorage.setItem("geocode_cache", "{}");
+        }
+
+        geocodecache = JSON.parse(geocodecache);
+        var cachekey = number + " || " + street + " || " + citystate;
+        var cacheitem = geocodecache[cachekey];
+        var timestamp = Math.floor(Date.now() / 1000);
+        if (typeof cacheitem != 'undefined') {
+            if (cacheitem.added + SETTINGS.geocodecacheexpiry < timestamp) {
+                console.log("Info", "Removing expired geocode cache item " + cachekey);
+                delete geocodecache[cachekey];
+                localStorage.setItem("geocode_cache", JSON.stringify(geocodecache));
+            } else {
+                console.log("Info", "Using cached geocode result", cacheitem);
+                addPackage(cacheitem.address, cacheitem.latitude, cacheitem.longitude, type, callback, deadline);
+                return;
+            }
+        }
+
         $.ajax({
             url: SETTINGS.geocodeapi,
             dataType: 'json',
@@ -308,6 +330,13 @@ function addPackageByAddress(number, street, citystate, type, callback) {
                 if (resp.status == "OK") {
                     if (resp.accuracy.ok) {
                         addPackage(resp.address.street, resp.coords[0], resp.coords[1], type, callback, deadline);
+                        geocodecache[cachekey] = {
+                            address: resp.address.street,
+                            latitude: resp.coords[0],
+                            longitude: resp.coords[1],
+                            added: Math.floor(Date.now() / 1000)
+                        };
+                        localStorage.setItem("geocode_cache", JSON.stringify(geocodecache));
                     } else {
                         playSound("error");
                         app.dialog.confirm(

www/settings.js

@@ -301,6 +301,7 @@ var SETTINGS = {
             ]
         }
     ],
+    geocodecacheexpiry: 604800, // One week
     geocodeapi: "https://apis.netsyms.net/packagehelper/geocode.php",
     trackingapi: "https://apis.netsyms.net/packagehelper/track.php",
     weatherapi: "https://apis.netsyms.net/packagehelper/weather.php",