fix contact id null exception for example bot ding-dong-bot #123

README.md

@@ -27,9 +27,9 @@ Wechaty is a Bot Framework for Wechat **Personal** Account which can help you cr
 
 > @naishstar: thanks for great SDK [link](https://github.com/wechaty/wechaty/issues/57)
 
-> @shevyan: 简单的接口...和Docker化的封装，结合Docker绝对是一个不错的选择 [link](http://mp.weixin.qq.com/s/o-4VMcAMz0K8yJVdNaUXow)
+> @shevyan: 简单的接口...和Docker化的封装...绝对是一个不错的选择 [link](http://mp.weixin.qq.com/s/o-4VMcAMz0K8yJVdNaUXow)
 
-> @lijiarui: [Chat实录｜李佳芮：向前一步的程序媛](http://mp.weixin.qq.com/s/dWHAj8XtiKG-1fIS5Og79g)
+> @lijiarui: Chat实录｜李佳芮：向前一步的程序媛 [link](http://mp.weixin.qq.com/s/dWHAj8XtiKG-1fIS5Og79g)
 
 # Example
 
@@ -204,7 +204,7 @@ Scan the following QR Code in WeChat, with secret code _wechaty_, you can join o
 
 ![Wechaty Developers' Home](https://raw.githubusercontent.com/wechaty/wechaty/master/image/BotQrcode.png)
 
-Scan now, then you can chat with other Wechaty developers!
+Scan now, then you can chat with other Wechaty developers! (secret code: _wechaty_)
 
 # See Also
 

example/ding-dong-bot.ts

@@ -44,7 +44,10 @@ console.log(welcome)
 const bot = Wechaty.instance({ profile: Config.DEFAULT_PROFILE })
 
 bot
-.on('login'	  , user => log.info('Bot', `${user.name()} logined`))
+.on('login'	  , user => {
+  log.info('Bot', `${user.name()} logined`)
+  bot.say('Wechaty login')
+})
 .on('logout'	, user => log.info('Bot', `${user.name()} logouted`))
 .on('error'   , e => log.info('Bot', 'error: %s', e))
 .on('scan', (url, code) => {
@@ -72,9 +75,6 @@ bot
 })
 
 bot.init()
-.then(() => {
-  bot.say('Wechaty init')
-})
 .catch(e => {
   log.error('Bot', 'init() fail: %s', e)
   bot.quit()

src/puppet-web/bridge.ts

@@ -127,7 +127,10 @@ export class Bridge {
     log.verbose('PuppetWebBridge', 'getUserName()')
 
     try {
-      return await this.proxyWechaty('getUserName')
+      const userName = await this.proxyWechaty('getUserName')
+
+      return userName
+
     } catch (e) {
       log.error('PuppetWebBridge', 'getUserName() exception: %s', e.message)
       throw e

src/puppet-web/puppet-web.ts

@@ -330,6 +330,10 @@ export class PuppetWeb extends Puppet {
    * send to `filehelper` for notice / log
    */
   public async say(content: string): Promise<void> {
+    if (!this.logined()) {
+      throw new Error('can not say before login')
+    }
+
     const m = new Message()
     m.to('filehelper')
     m.content(content)