Load AGPS data on app start and automatically in background

apps/agpsdata/ChangeLog

@@ -1 +1,2 @@
 0.01: First, proof of concept
+0.02: Load AGPS data on app start and automatically in background

apps/agpsdata/app.js

@@ -1,125 +1,29 @@
-var _GB = global.GB;
+function display(text1, text2) {
-var counter = 0;
-
-function GB(msg) {
-  console.log(msg);
-  if (msg.t == "http") {
-    display("Received", "(" + msg.resp.length + ") Touch to apply", () => {
-      display("Apply data..", "");
-      setTimeout(() => {
-        if (setAGPS(msg.resp)) {
-          display("Success", "Touch for restart", httpTest);
-        }
-        else {
-          display("Error", "Touch for restart", httpTest);
-        }
-      }, 1);
-    });
-  }
-  if (_GB) {
-    _GB(msg);
-  }
-}
-
-function setAGPS(data) {
-  var js = jsFromBase64(data);
-  console.log(js);
-  try {
-    eval(js);
-    return true;
-  }
-  catch(e) {
-    console.log("Error:", e);
-  }
-  return false;
-}
-
-function jsFromBase64(b64) {
-  var bin = atob(b64);
-  var chunkSize = 128;
-  var js = "Bangle.setGPSPower(1);\n"; // turn GPS on
-  var gnss_select="1";
-  js += `Serial1.println("${CASIC_CHECKSUM("$PCAS04,"+gnss_select)}")\n`; // set GNSS mode
-  // What about:
-  // NAV-TIMEUTC (0x01 0x10)
-  // NAV-PV (0x01 0x03)
-  // or AGPS.zip uses AID-INI (0x0B 0x01)
-
-  for (var i=0;i<bin.length;i+=chunkSize) {
-    var chunk = bin.substr(i,chunkSize);
-    js += `Serial1.write(atob("${btoa(chunk)}"))\n`;
-  }
-  return js;
-}
-
-function CASIC_CHECKSUM(cmd) {
-  var cs = 0;
-  for (var i=1;i<cmd.length;i++)
-    cs = cs ^ cmd.charCodeAt(i);
-  return cmd+"*"+cs.toString(16).toUpperCase().padStart(2, '0');
-}
-
-function display(text1, text2, next) {
   g.reset();
   g.clear();
   var img = require("Storage").read("agpsdata.img");
   if (img) {
     g.drawImage(img, g.getWidth() - 48, g.getHeight()-48-24);
   }
-  g.setFont("Vector", 30);
+  g.setFont("Vector", 20);
   g.setFontAlign(0, 1);
   g.drawString(text1, g.getWidth() / 2, g.getHeight() / 3 + 24);
-  g.setFont("Vector", 15);
+  if (text2 != undefined) {
-  g.setFontAlign(-1, -1);
+    g.setFont("Vector", 15);
-  g.drawString(text2, 0, g.getHeight() / 3 + 29);
+    g.setFontAlign(-1, -1);
+    g.drawString(text2, 5, g.getHeight() / 3 + 29);
+  }
   Bangle.drawWidgets();
-  nextStep = null;
-  if (next) {
-    nextStep = next;
-  }
 }
 
-function httpTest() {
-  counter++;  
-  display("AGPS Data", "Touch for start", () => {
-    display("Request...", "Touch for restart", httpTest);
-    if (Bluetooth.println) {
-      console.log("On device");
-      Bluetooth.println(JSON.stringify({t:"info", msg:"HTTP Request"}));
-      Bluetooth.println(JSON.stringify({t:"http", url:"https://www.espruino.com/agps/casic.base64"}));
-    }
-    else {
-      console.log("Testing on Emulator");
-      setTimeout(() => {
-        GB({t:"http", resp:testData});
-      }, 1);
-    }
-  });
-}
-
-var nextStep = null;
-
-Bangle.on("touch", () => {
-  if (nextStep) {
-    nextStep();
-  }
-});
-
-httpTest();
-
 // Show launcher when middle button pressed
 // Load widgets
 Bangle.loadWidgets();
 Bangle.drawWidgets();
 
-
+display("Updating data...");
-/*
+require("agpsdata").pull(function() {
-require("Storage").write("httptest.info",{
+    display("Success", "AGPS data updated.");
-  "id":"httptest",
+},function(error) {
-  "name":"Http Test",
+    display("Error:", error);
-  "src":"httptest.js",
-  "icon":"wristlight.img"
 });
-*/
-
-var testData = "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";

apps/agpsdata/boot.js

@@ -0,0 +1,33 @@
+(function() {
+  let waiting = false;
+  let settings = require("Storage").readJSON("agpsdata.json", 1) || {
+    enabled: true,
+    refresh: 1440
+  };
+  
+  if (settings.refresh == undefined) settings.refresh = 1440;
+
+  function successCallback(){
+    waiting = false;
+  }
+
+  function errorCallback(){
+    waiting = false;
+  }
+
+  if (settings.enabled) {
+    let lastUpdate = settings.lastUpdate;
+    if (!lastUpdate || lastUpdate + settings.refresh * 1000 * 60 < Date.now()){
+      if (!waiting){
+        waiting = true;
+        require("agpsdata").pull(successCallback, errorCallback);
+      }
+    }
+    setInterval(() => {
+      if (!waiting && NRF.getSecurityStatus().connected){
+        waiting = true;
+        require("agpsdata").pull(successCallback, errorCallback);
+      }
+    }, settings.refresh * 1000 * 60);
+  }
+})();

apps/agpsdata/default.json

@@ -0,0 +1 @@
+{"enabled":true,"refresh":1440}

apps/agpsdata/lib.js

@@ -0,0 +1,64 @@
+function setAGPS(data) {
+  var js = jsFromBase64(data);
+  try {
+    eval(js);
+    return true;
+  }
+  catch(e) {
+    console.log("error:", e);
+  }
+  return false;
+}
+
+function jsFromBase64(b64) {
+  var bin = atob(b64);
+  var chunkSize = 128;
+  var js = "Bangle.setGPSPower(1);\n"; // turn GPS on
+  var gnss_select="1";
+  js += `Serial1.println("${CASIC_CHECKSUM("$PCAS04,"+gnss_select)}")\n`; // set GNSS mode
+  // What about:
+  // NAV-TIMEUTC (0x01 0x10)
+  // NAV-PV (0x01 0x03)
+  // or AGPS.zip uses AID-INI (0x0B 0x01)
+
+  for (var i=0;i<bin.length;i+=chunkSize) {
+    var chunk = bin.substr(i,chunkSize);
+    js += `Serial1.write(atob("${btoa(chunk)}"))\n`;
+  }
+  return js;
+}
+
+function CASIC_CHECKSUM(cmd) {
+  var cs = 0;
+  for (var i=1;i<cmd.length;i++)
+    cs = cs ^ cmd.charCodeAt(i);
+  return cmd+"*"+cs.toString(16).toUpperCase().padStart(2, '0');
+}
+
+function updateLastUpdate() {
+  let settings = require("Storage").readJSON("agpsdata.json", 1) || {};
+  settings.lastUpdate = Math.round(Date.now());   
+  require("Storage").writeJSON("agpsdata.json", settings)
+}
+
+exports.pull = function(successCallback, failureCallback) {
+  let uri = "https://www.espruino.com/agps/casic.base64";
+  if (Bangle.http){
+    Bangle.http(uri, {timeout:10000}).then(event => {
+      let result = setAGPS(event.resp);
+      if (result) {
+          updateLastUpdate();
+          if (successCallback) successCallback();
+      } else {
+          console.log("error applying AGPS data");
+          if (failureCallback) failureCallback("Error applying AGPS data");
+      }
+    }).catch((e)=>{
+      console.log("error", e);
+      if (failureCallback) failureCallback(e);
+    });
+  } else {
+    console.log("error: No http method found");
+    if (failureCallback) failureCallback(/*LANG*/"No http method found");
+  }
+};

apps/agpsdata/metadata.json

@@ -2,15 +2,22 @@
   "name": "A-GPS Data",
   "shortName":"AGPS Data",
   "icon": "agpsdata.png",
-  "version":"0.01",
+  "version":"0.02",
-  "description": "Download assisted GPS data directly to watch",
+  "description": "Download assisted GPS (AGPS) data directly to watch",
-  "tags": "assisted,gps,agps,http",
+  "tags": "boot,tool,assisted,gps,agps,http",
   "allow_emulator":true, 
   "supports": ["BANGLEJS2"],
   "readme":"README.md",
   "screenshots" : [ { "url":"screenshot.png" }, { "url":"screenshot2.png" }, { "url":"screenshot3.png" }, { "url":"screenshot4.png" }, { "url":"screenshot5.png" } ],
   "storage": [
     {"name":"agpsdata.app.js","url":"app.js"},
-    {"name":"agpsdata.img","url":"agpsdata-icon.js","evaluate":true}
+    {"name":"agpsdata.img","url":"agpsdata-icon.js","evaluate":true},
+    {"name":"agpsdata.default.json","url":"default.json"},
+    {"name":"agpsdata.boot.js","url":"boot.js"},
+    {"name":"agpsdata","url":"lib.js"},
+    {"name":"agpsdata.settings.js","url":"settings.js"}
+  ],
+  "data": [
+    {"name": "agpsdata.json"}
   ]
 }

apps/agpsdata/settings.js

@@ -0,0 +1,59 @@
+(function(back) {
+  function writeSettings(key, value) {
+    var s = require('Storage').readJSON(FILE, true) || {};
+    s[key] = value;
+    require('Storage').writeJSON(FILE, s);
+    readSettings();
+  }
+
+  function readSettings(){
+    settings = Object.assign(
+      require('Storage').readJSON("agpsdata.default.json", true) || {},
+      require('Storage').readJSON(FILE, true) || {}
+    );
+  }
+
+  var FILE="agpsdata.json";
+  var settings;
+  readSettings();
+
+  function buildMainMenu(){
+    var mainmenu = {
+      '': { 'title': 'AGPS download' },
+      '< Back': back,
+      "Enabled": {
+        value: !!settings.enabled,
+        onchange: v => {
+          writeSettings("enabled", v);
+        }
+      },
+      "Refresh every": {
+        value: settings.refresh / 60,
+        min: 1,
+        max: 48,
+        step: 1,
+        format: v=>v+"h",
+        onchange: v => {
+          writeSettings("refresh",Math.round(v * 60));
+        }
+      },
+      "Force refresh": ()=>{
+        E.showMessage("Loading AGPS data");
+        
+        require("agpsdata").pull(function() {
+             E.showAlert("Success").then(()=>{
+                E.showMenu(buildMainMenu());
+              });
+         },function(error) {
+             E.showAlert(error,"Error").then(()=>{
+                E.showMenu(buildMainMenu());
+              });
+        });
+      }
+    };
+
+    return mainmenu;
+  }
+
+  E.showMenu(buildMainMenu());
+});