empty data bug fix, use `~/.wechaty/` to store cache db files

src/puppet-padchat/bridge.ts

@@ -103,9 +103,10 @@ export class Bridge extends PadchatRpc {
     }
 
     const baseDir = path.join(
-      os.tmpdir(),
+      os.homedir(),
       path.sep,
-      'wechaty-puppet-padchat',
+      '.wechaty',
+      'puppet-padchat-token-cache',
       path.sep,
       token,
       path.sep,

src/puppet-padchat/padchat-rpc.ts

@@ -18,8 +18,6 @@ import Peer, {
   // parse,
 // }                                   from 'json-rpc-peer'
 
-// import { MemoryCard }   from 'memory-card'
-
 import {
   // PadchatContinue,
   // PadchatMsgType,
@@ -568,7 +566,7 @@ export class PadchatRpc extends EventEmitter {
       // to Array (PadchatRoomRawMember[])
 
       // https://stackoverflow.com/a/24417399/1123955
-      const data          = result.member.data.replace(/\+/g, '%20')
+      const data          = result.member && result.member.data && result.member.data.replace(/\+/g, '%20') || null
       const tryMemberList = JSON.parse(decodeURIComponent(data)) as PadchatRoomMemberPayload[]
 
       if (Array.isArray(tryMemberList)) {