From 0233c40f2139e14b61e28e102aa9252604bd80bd Mon Sep 17 00:00:00 2001
From: Henry Au-Yeung Ho Nam <pyc05079@gmail.com>
Date: Thu, 11 May 2017 00:59:39 +0800
Subject: [PATCH 1/3] Link message revoke function to itchat

this is my first uploading code using github, apologize if it caused any inconvenience.
---
 itchat/__init__.py | 1 +
 itchat/core.py     | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/itchat/__init__.py b/itchat/__init__.py
index dfc19acd..256fc721 100644
--- a/itchat/__init__.py
+++ b/itchat/__init__.py
@@ -51,6 +51,7 @@ def new_instance():
 send_image                  = originInstance.send_image
 send_video                  = originInstance.send_video
 send                        = originInstance.send
+revoke                      = originInstance.revoke
 # components.hotreload
 dump_login_status           = originInstance.dump_login_status
 load_login_status           = originInstance.load_login_status
diff --git a/itchat/core.py b/itchat/core.py
index ba384ced..6a6a268e 100644
--- a/itchat/core.py
+++ b/itchat/core.py
@@ -369,6 +369,14 @@ def send(self, msg, toUserName=None, mediaId=None):
             it is defined in components/messages.py
         '''
         raise NotImplementedError()
+    def revoke(self, localID, msgID, toUserName=None):
+        ''' revoke message with its LocalID and MsgID
+            for options
+                - localID: message ID at local
+                - msgID: message ID on server
+                - toUserName: 'UserName' key of friend dict
+            it is defined in components/messages.py
+        '''
     def dump_login_status(self, fileDir=None):
         ''' dump login status to a specific file
             for option

From 294e98dae83b90c39695ae4577197282dc5ed8d4 Mon Sep 17 00:00:00 2001
From: Henry Au-Yeung Ho Nam <pyc05079@gmail.com>
Date: Thu, 11 May 2017 01:11:24 +0800
Subject: [PATCH 2/3] Add message revoke function

function added at the end of file, after the position of send
---
 itchat/components/messages.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/itchat/components/messages.py b/itchat/components/messages.py
index 8f00bab1..8374f24a 100644
--- a/itchat/components/messages.py
+++ b/itchat/components/messages.py
@@ -21,6 +21,7 @@ def load_messages(core):
     core.send_image   = send_image
     core.send_video   = send_video
     core.send         = send
+    core.revoke       = revoke
 
 def get_download_fn(core, url, msgId):
     def download_fn(downloadDir=None):
@@ -506,3 +507,17 @@ def send(self, msg, toUserName=None, mediaId=None):
     else:
         r = self.send_msg(msg, toUserName)
     return r
+
+def revoke(self, localID, msgID, toUserName):
+    url = '%s/webwxrevokemsg' % self.loginInfo['url']
+    data = {
+        'BaseRequest': self.loginInfo['BaseRequest'],
+        "ClientMsgId": localID,
+        "SvrMsgId": msgID,
+        "ToUserName": toUserName}
+    headers = { 
+        'ContentType': 'application/json; charset=UTF-8', 
+        'User-Agent' : config.USER_AGENT }
+    r = self.s.post(url, headers=headers,
+        data=json.dumps(data, ensure_ascii=False).encode('utf8'))
+    return ReturnValue(rawResponse=r)

From 45f5db756c6d54c1e14607993b5489bcbb6e4089 Mon Sep 17 00:00:00 2001
From: Henry Au-Yeung Ho Nam <pyc05079@gmail.com>
Date: Tue, 16 May 2017 16:36:20 +0800
Subject: [PATCH 3/3] Update core.py

---
 itchat/core.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/itchat/core.py b/itchat/core.py
index 6a6a268e..59d9763d 100644
--- a/itchat/core.py
+++ b/itchat/core.py
@@ -377,6 +377,7 @@ def revoke(self, localID, msgID, toUserName=None):
                 - toUserName: 'UserName' key of friend dict
             it is defined in components/messages.py
         '''
+        raise NotImplementedError()
     def dump_login_status(self, fileDir=None):
         ''' dump login status to a specific file
             for option