chore: use es6 for cloudevents.js (#73)

Signed-off-by: Grant Timmerman <timmerman+devrel@google.com>

lib/cloudevent.js

@@ -6,18 +6,20 @@ const Formatter = require("./formats/json/formatter.js");
  *
  * https://en.wikipedia.org/wiki/Builder_pattern
  */
-function Cloudevent(_spec, _formatter) {
-  this.spec = (_spec) ? new _spec(Cloudevent) : new Spec(Cloudevent);
+class CloudEvent {
+  constructor(_spec, _formatter) {
+    this.spec = (_spec) ? new _spec(CloudEvent) : new Spec(CloudEvent);
     this.formatter = (_formatter) ? new _formatter() : new Formatter();
 
     // The map of extensions
     this.extensions = {};
   }
 
-/*
- * To format the payload using the formatter
- */
-Cloudevent.prototype.format = function() {
+  getFormats() {
+    return { json: Formatter };
+  }
+
+  format() {
     // Check the constraints
     this.spec.check();
 
@@ -26,102 +28,95 @@ Cloudevent.prototype.format = function() {
 
     // Then, format
     return this.formatter.format(this.spec.payload);
-};
+  }
 
-Cloudevent.prototype.toString = function() {
+  toString() {
     return this.formatter.toString(this.spec.payload);
-};
+  }
 
-Cloudevent.prototype.type = function(type) {
+  type(type) {
     this.spec.type(type);
     return this;
-};
+  }
 
-Cloudevent.prototype.getType = function() {
+  getType() {
     return this.spec.getType();
-};
+  }
 
-Cloudevent.prototype.specversion = function(version) {
+  specversion(version) {
     return this.spec.specversion(version);
-};
+  }
 
-Cloudevent.prototype.getSpecversion = function() {
+  getSpecversion() {
     return this.spec.getSpecversion();
-};
+  }
 
-Cloudevent.prototype.source = function(_source) {
+  source(_source) {
     this.spec.source(_source);
     return this;
-};
+  }
 
-Cloudevent.prototype.getSource = function() {
+  getSource() {
     return this.spec.getSource();
-};
+  }
 
-Cloudevent.prototype.id = function(_id) {
+  id(_id) {
     this.spec.id(_id);
     return this;
-};
+  }
 
-Cloudevent.prototype.getId = function() {
+  getId() {
     return this.spec.getId();
-};
+  }
 
-Cloudevent.prototype.time = function(_time) {
+  time(_time) {
     this.spec.time(_time);
     return this;
-};
+  }
 
-Cloudevent.prototype.getTime = function() {
+  getTime() {
     return this.spec.getTime();
-};
+  }
 
-Cloudevent.prototype.schemaurl = function(_schemaurl) {
+  schemaurl(_schemaurl) {
     this.spec.schemaurl(_schemaurl);
     return this;
-};
+  }
 
-Cloudevent.prototype.getSchemaurl = function() {
+  getSchemaurl() {
     return this.spec.getSchemaurl();
-};
+  }
 
-Cloudevent.prototype.dataContenttype = function(_contenttype) {
+  dataContenttype(_contenttype) {
     this.spec.dataContenttype(_contenttype);
     return this;
-};
+  }
 
-Cloudevent.prototype.getDataContenttype = function() {
+  getDataContenttype() {
     return this.spec.getDataContenttype();
-};
+  }
 
-Cloudevent.prototype.data = function(_data) {
+  data(_data) {
     this.spec.data(_data);
     return this;
-};
+  }
 
-Cloudevent.prototype.getData = function() {
+  getData() {
     return this.spec.getData();
-};
+  }
 
-Cloudevent.prototype.addExtension = function(key, value) {
+  addExtension(key, value) {
     this.spec.addExtension(key, value);
 
-  // Stores localy
+    // Stores locally
     this.extensions[key] = value;
 
     return this;
-};
+  }
 
-Cloudevent.prototype.getExtensions = function() {
+  getExtensions() {
     return this.extensions;
-};
+  }
+}
 
-/*
- * Export the formats
- */
-Cloudevent.formats = {
-  json: Formatter,
-  "json0.1": Formatter
-};
-
-module.exports = Cloudevent;
+module.exports = CloudEvent;