Add /account/3pid/delete endpoint

Also fix a typo in a comment

synapse/handlers/auth.py

@@ -617,6 +617,17 @@ class AuthHandler(BaseHandler):
             self.hs.get_clock().time_msec()
         )
 
+    @defer.inlineCallbacks
+    def delete_threepid(self, user_id, medium, address):
+        # 'Canonicalise' email addresses as per above
+        if medium == 'email':
+            address = address.lower()
+
+        ret = yield self.store.user_delete_threepid(
+            user_id, medium, address,
+        )
+        defer.returnValue(ret)
+
     def _save_session(self, session):
         # TODO: Persistent storage
         logger.debug("Saving session %s", session)

synapse/rest/client/v2_alpha/account.py

@@ -241,7 +241,7 @@ class ThreepidRestServlet(RestServlet):
 
         for reqd in ['medium', 'address', 'validated_at']:
             if reqd not in threepid:
-                logger.warn("Couldn't add 3pid: invalid response from ID sevrer")
+                logger.warn("Couldn't add 3pid: invalid response from ID server")
                 raise SynapseError(500, "Invalid response from ID Server")
 
         yield self.auth_handler.add_threepid(
@@ -263,9 +263,43 @@ class ThreepidRestServlet(RestServlet):
         defer.returnValue((200, {}))
 
 
+class ThreepidDeleteRestServlet(RestServlet):
+    PATTERNS = client_v2_patterns("/account/3pid/delete$", releases=())
+
+    def __init__(self, hs):
+        super(ThreepidDeleteRestServlet, self).__init__()
+        self.auth = hs.get_auth()
+        self.auth_handler = hs.get_auth_handler()
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        yield run_on_reactor()
+
+        body = parse_json_object_from_request(request)
+
+        required = ['medium', 'address']
+        absent = []
+        for k in required:
+            if k not in body:
+                absent.append(k)
+
+        if absent:
+            raise SynapseError(400, "Missing params: %r" % absent, Codes.MISSING_PARAM)
+
+        requester = yield self.auth.get_user_by_req(request)
+        user_id = requester.user.to_string()
+
+        yield self.auth_handler.delete_threepid(
+            user_id, body['medium'], body['address']
+        )
+
+        defer.returnValue((200, {}))
+
+
 def register_servlets(hs, http_server):
     PasswordRequestTokenRestServlet(hs).register(http_server)
     PasswordRestServlet(hs).register(http_server)
     DeactivateAccountRestServlet(hs).register(http_server)
     ThreepidRequestTokenRestServlet(hs).register(http_server)
     ThreepidRestServlet(hs).register(http_server)
+    ThreepidDeleteRestServlet(hs).register(http_server)

synapse/storage/registration.py

@@ -413,6 +413,17 @@ class RegistrationStore(background_updates.BackgroundUpdateStore):
             desc="user_delete_threepids",
         )
 
+    def user_delete_threepid(self, user_id, medium, address):
+        return self._simple_delete(
+            "user_threepids",
+            keyvalues={
+                "user_id": user_id,
+                "medium": medium,
+                "address": address,
+            },
+            desc="user_delete_threepids",
+        )
+
     @defer.inlineCallbacks
     def count_all_users(self):
         """Counts all users registered on the homeserver."""