Currency list in settings

js/services/rate.js

@@ -1,28 +1,51 @@
 'use strict';
 
-var RateService = function($http) {
+var request = require('request');
+
+var RateService = function() {
   this.isAvailable = false;
   this.SAT_TO_BTC = 1 / 1e8;
+  this.queued = [];
+  this.alternatives = [];
   var that = this;
   var backoff = 5;
   var retrieve = function() {
-    $http({method: 'GET', url: 'https://bitpay.com/api/rates'}).
-    success(function(data, status, headers, config) {
+    request.get({
+      url:'https://bitpay.com/api/rates',
+      json: true
+    }, function(err, response, listOfCurrencies) {
+      if (err) {
+        backoff *= 1.5;
+        setTimeout(retrieve, backoff * 1000);
+        return;
+      }
       var rates = {};
-      data.forEach(function(element) {
+      listOfCurrencies.forEach(function(element) {
         rates[element.code] = element.rate;
+        that.alternatives.push({
+          name: element.name,
+          isoCode: element.code,
+          rate: element.rate
+        });
       });
       that.isAvailable = true;
       that.rates = rates;
-    }).
-    error(function(data, status, headers, config) {
-      backoff *= 1.5;
-      setTimeout(retrieve, backoff * 1000);
+      that.queued.forEach(function(callback) {
+        setTimeout(callback, 0);
+      });
     });
   };
   retrieve();
 };
 
+RateService.prototype.whenAvailable = function(callback) {
+  if (this.isAvailable) {
+    setTimeout(callback, 0);
+  } else {
+    this.queued.push(callback);
+  }
+};
+
 RateService.prototype.toFiat = function(satoshis, code) {
   if (!this.isAvailable) {
     return 0;
@@ -37,4 +60,19 @@ RateService.prototype.fromFiat = function(amount, code) {
   return amount / this.rates[code] / this.SAT_TO_BTC;
 };
 
+RateService.prototype.listAlternatives = function() {
+  if (!this.isAvailable) {
+    return [];
+  }
+
+  var alts = [];
+  this.alternatives.forEach(function(element) {
+    alts.push({
+      name: element.name,
+      isoCode: element.isoCode
+    });
+  });
+  return alts;
+};
+
 angular.module('copayApp.services').service('rateService', RateService);