From b102ac4b2aa0c1cede1f9462edebd851c25128d3 Mon Sep 17 00:00:00 2001
From: Rapptz <rapptz@gmail.com>
Date: Fri, 21 Aug 2015 22:53:47 -0400
Subject: [PATCH] Add the ability to edit messages.

---
 discord/client.py | 44 ++++++++++++++++++++++++++++++++++++--------
 examples/edits.py |  8 ++++++++
 2 files changed, 44 insertions(+), 8 deletions(-)

diff --git a/discord/client.py b/discord/client.py
index bcd151770..f81db1c12 100644
--- a/discord/client.py
+++ b/discord/client.py
@@ -118,6 +118,14 @@ class Client(object):
     def _get_message(self, msg_id):
         return next((m for m in self.messages if m.id == msg_id), None)
 
+    def _resolve_mentions(self, content, mentions):
+        if isinstance(mentions, list):
+            return [user.id for user in mentions]
+        elif mentions == True:
+            return re.findall(r'@<(\d+)>', content)
+        else:
+            return []
+
     def _received_message(self, msg):
         response = json.loads(str(msg))
         if response.get('op') != 0:
@@ -258,13 +266,7 @@ class Client(object):
             raise InvalidDestination('Destination must be Channel, PrivateChannel, or User')
 
         content = str(content)
-
-        if isinstance(mentions, list):
-            mentions = [user.id for user in mentions]
-        elif mentions == True:
-            mentions = re.findall(r'@<(\d+)>', content)
-        else:
-            mentions = []
+        mentions = self._resolve_mentions(content, mentions)
 
         url = '{base}/{id}/messages'.format(base=endpoints.CHANNELS, id=channel_id)
         payload = {
@@ -278,7 +280,7 @@ class Client(object):
         if response.status_code == 200:
             data = response.json()
             channel = self.get_channel(data.get('channel_id'))
-            message = Message(channel=channel, **response.json())
+            message = Message(channel=channel, **data)
             return message
 
     def delete_message(self, message):
@@ -291,6 +293,32 @@ class Client(object):
         url = '{}/{}/messages/{}'.format(endpoints.CHANNELS, message.channel.id, message.id)
         response = requests.delete(url, headers=self.headers)
 
+    def edit_message(self, message, new_content, mentions=True):
+        """Edits a :class:`Message` with the new message content.
+
+        The new_content must be able to be transformed into a string via ``str(new_content)``.
+
+        :param message: The :class:`Message` to edit.
+        :param new_content: The new content to replace the message with.
+        :param mentions: The mentions for the user. Same as :meth:`send_message`.
+        :return: The new edited message or None if an error occurred."""
+        channel = message.channel
+        content = str(new_content)
+
+        url = '{}/{}/messages/{}'.format(endpoints.CHANNELS, channel.id, message.id)
+        payload = {
+            'content': content
+        }
+
+        if not channel.is_private:
+            payload['mentions'] = self._resolve_mentions(content, mentions)
+
+        response = requests.patch(url, headers=self.headers, json=payload)
+        if response.status_code == 200:
+            data = response.json()
+            return Message(channel=channel, **data)
+
+
     def login(self, email, password):
         """Logs in the user with the following credentials.
 
diff --git a/examples/edits.py b/examples/edits.py
index c1619cecb..e8233bbb0 100644
--- a/examples/edits.py
+++ b/examples/edits.py
@@ -1,4 +1,5 @@
 import discord
+import time
 
 client = discord.Client()
 client.login('email', 'password')
@@ -9,6 +10,13 @@ def on_ready():
     print('Username: ' + client.user.name)
     print('ID: ' + client.user.id)
 
+@client.event
+def on_message(message):
+    if message.content.startswith('!editme'):
+        msg = client.send_message(message.author, '10')
+        time.sleep(3)
+        client.edit_message(msg, '40')
+
 @client.event
 def on_message_edit(before, after):
     client.send_message(after.channel, '**{}** edited their message:\n{}'.format(after.author.name, before.content))