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gaia/dev_apps/mobile-wallet/js/common/utils.js

@@ -0,0 +1,82 @@
+'use strict';  
+
+/* exported Timer, addMixin, ObserverSubjectMixin, DebugMixin */
+
+(function(exports) {
+
+  function addMixin(destination, source) {
+    for (var k in source) {
+      if (source.hasOwnProperty(k) && !(k in destination)) {
+        destination[k] = source[k];
+      }
+    }
+    return destination;
+  }
+
+  var DebugMixin = {
+    DEBUG: true,
+
+    debug: function(msg, obj) {
+      if(!this.DEBUG) {
+        return;
+      }
+
+      var str = (this._id) ? ('[' + this._id + '] ' + msg) : msg;
+      if(obj) {
+        str += '|' + JSON.stringify(obj);
+      }
+      console.log(str);
+    }
+  };
+
+  var ObserverSubjectMixin = {
+      _notify: function mlv_notify(data) {
+        if(this._observers && Array.isArray(this._observers)) {
+          this._observers.forEach((obs) => obs.onEvent(this._id, data));
+        }
+      },
+
+      addListener: function mlv_addListener(observer) {
+        if('onEvent' in observer) {
+          if(!this._observers) {
+            this._observers = [];
+          }
+          this._observers.push(observer);
+        }
+      },
+
+      removeListener: function mlv_removeListener(observer) {
+        if(!this._observers || !Array.isArray(this._observers)) {
+          return;
+        }
+
+        var idx = this._observers.indexOf(observer);
+        if(idx !== -1) {
+          this._observers.splice(idx, 1);
+        }
+      },
+  };
+
+  var Timer = function() {
+    this._startTime = new Date();
+  };
+
+  Timer.prototype = {
+    _startTime: null,
+
+    getElapsedTime: function getElapsedTime() {
+      var endTime = new Date();
+      return endTime.getTime() - this._startTime.getTime();
+    },
+
+    reset: function reset() {
+      this._startTime = new Date();
+    }
+  };
+
+  exports.addMixin = addMixin;
+  exports.DebugMixin = DebugMixin;
+  exports.ObserverSubjectMixin = ObserverSubjectMixin;
+  exports.Timer = Timer;
+
+}((typeof exports === 'undefined') ? window : exports));