WIP: fix abstract class can not be instanciated...

examples/ding-dong-bot.ts

@@ -100,7 +100,7 @@ bot
       /**
        * 2. reply qrcode image
        */
-      const imageMessage = new bot.Message(BOT_QR_CODE_IMAGE_FILE)
+      const imageMessage = bot.Message.create(BOT_QR_CODE_IMAGE_FILE)
       log.info('Bot', 'REPLY: %s', imageMessage)
       await m.say(imageMessage)
 

src/puppet/message.ts

@@ -67,6 +67,13 @@ export abstract class Message extends PuppetAccessory implements Sayable {
     ]
   }
 
+  public static create<T extends Message>(
+    this: { new (...args: any[]): T },
+    ...args: any[],
+  ): T {
+    return new this(...args)
+  }
+
   /**
    * @private
    */
@@ -190,7 +197,7 @@ export abstract class Message extends PuppetAccessory implements Sayable {
    *   if (/^ding$/i.test(m.text())) {
    *     await m.say('hello world')
    *     console.log('Bot REPLY: hello world')
-   *     await m.say(new Message(__dirname + '/wechaty.png'))
+   *     await m.say(new bot.Message.create(__dirname + '/wechaty.png'))
    *     console.log('Bot REPLY: Image')
    *   }
    * })

src/wechaty.ts

@@ -22,7 +22,7 @@ import * as os      from 'os'
 import * as semver  from 'semver'
 
 import {
-  Constructor,
+  // Constructor,
   cloneClass,
   instanceToClass,
 }                   from 'clone-class'
@@ -113,13 +113,14 @@ export class Wechaty extends PuppetAccessory implements Sayable {
   public readonly cuid:        string
 
   // tslint:disable-next-line:variable-name
-  public Contact        : typeof Contact        & Constructor<{}>
+  public Contact        : typeof Contact //       & Constructor<{}>
   // tslint:disable-next-line:variable-name
-  public FriendRequest  : typeof FriendRequest  & Constructor<{}>
+  public FriendRequest  : typeof FriendRequest // & Constructor<{}>
   // tslint:disable-next-line:variable-name
-  public Message        : typeof Message        & Constructor<{}>
+  public Message        : typeof Message //       & Constructor<{}>
   // tslint:disable-next-line:variable-name
-  public Room           : typeof Room           & Constructor<{}>
+  public Room           : typeof Room //           & Constructor<{}>
+  // public Room           : typeof Room           & Constructor<{}>
 
   /**
    * get the singleton instance of Wechaty
@@ -259,7 +260,7 @@ export class Wechaty extends PuppetAccessory implements Sayable {
    * @param   {WechatyEventFunction}  listener   - Depends on the WechatyEvent
    * @return  {Wechaty}                          - this for chain
    *
-   * More Example Gist: [Examples/Friend-Bot]{@link https://github.com/wechaty/wechaty/blob/master/examples/friend-bot.ts}
+   * More Example Gist: [Examples/Friend-Bot]{@link https://github.com/Chatie/wechaty/blob/master/examples/friend-bot.ts}
    *
    * @example <caption>Event:scan </caption>
    * wechaty.on('scan', (url: string, code: number) => {