Add a way to get the ical representation to events.

src/ical.js.d.ts

@@ -11,6 +11,10 @@ declare module 'ical.js' {
 
     getFirstProperty(name?: string): Property;
     getAllProperties(name?: string): Array<Property>;
+
+    updatePropertyWithValue(name: string, value: string | number | object): Property;
+
+    addSubcomponent(component: Component): Component;
   }
 
   class Event {
@@ -22,6 +26,8 @@ declare module 'ical.js' {
     location: string;
     attendees: Array<Property>;
 
+    component: Component;
+
     constructor(component?: Component | null,
                 options?: {strictExceptions: boolean, exepctions: Array<Component|Event>});
   }

src/pim-types.tsx

@@ -3,6 +3,10 @@ import * as ICAL from 'ical.js';
 export class EventType extends ICAL.Event {
   color: string;
 
+  static fromVCalendar(comp: ICAL.Component) {
+    return new EventType(comp.getFirstSubcomponent('vevent'));
+  }
+
   get title() {
     return this.summary;
   }
@@ -15,8 +19,12 @@ export class EventType extends ICAL.Event {
     return this.endDate.toJSDate();
   }
 
-  static fromVCalendar(comp: ICAL.Component) {
-    return new EventType(comp.getFirstSubcomponent('vevent'));
+  toIcal() {
+    let comp = new ICAL.Component(['vcalendar', [], []]);
+    comp.updatePropertyWithValue('prodid', '-//iCal.js EteSync Web');
+
+    comp.addSubcomponent(this.component);
+    return comp.toString();
   }
 }