Add admin api for sending server_notices (#5121)

21 files changed, 196 insertions, 42 deletions

diff --git a/changelog.d/5121.feature b/changelog.d/5121.feature
new file mode 100644
index 0000000000..54b228680d
--- /dev/null
+++ b/changelog.d/5121.feature
@@ -0,0 +1 @@
+Implement an admin API for sending server notices. Many thanks to @krombel who provided a foundation for this work.
diff --git a/docs/admin_api/server_notices.md b/docs/admin_api/server_notices.md
new file mode 100644
index 0000000000..5ddd21cfb2
--- /dev/null
+++ b/docs/admin_api/server_notices.md
@@ -0,0 +1,48 @@
+# Server Notices
+
+The API to send notices is as follows:
+
+```
+POST /_synapse/admin/v1/send_server_notice
+```
+
+or:
+
+```
+PUT /_synapse/admin/v1/send_server_notice/{txnId}
+```
+
+You will need to authenticate with an access token for an admin user.
+
+When using the `PUT` form, retransmissions with the same transaction ID will be
+ignored in the same way as with `PUT
+/_matrix/client/r0/rooms/{roomId}/send/{eventType}/{txnId}`.
+
+The request body should look something like the following:
+
+```json
+{
+    "user_id": "@target_user:server_name",
+    "content": {
+        "msgtype": "m.text",
+        "body": "This is my message"
+    }
+}
+```
+
+You can optionally include the following additional parameters:
+
+* `type`: the type of event. Defaults to `m.room.message`.
+* `state_key`: Setting this will result in a state event being sent.
+
+
+Once the notice has been sent, the APU will return the following response:
+
+```json
+{
+    "event_id": "<event_id>"
+}
+```
+
+Note that server notices must be enabled in `homeserver.yaml` before this API
+can be used. See [server_notices.md](../server_notices.md) for more information.
diff --git a/docs/server_notices.md b/docs/server_notices.md
index 58f8776319..950a6608e9 100644
--- a/docs/server_notices.md
+++ b/docs/server_notices.md
@@ -1,5 +1,4 @@
-Server Notices
-==============
+# Server Notices
 
 'Server Notices' are a new feature introduced in Synapse 0.30. They provide a
 channel whereby server administrators can send messages to users on the server.
@@ -11,8 +10,7 @@ they may also find a use for features such as "Message of the day".
 This is a feature specific to Synapse, but it uses standard Matrix
 communication mechanisms, so should work with any Matrix client.
 
-User experience
----------------
+## User experience
 
 When the user is first sent a server notice, they will get an invitation to a
 room (typically called 'Server Notices', though this is configurable in
@@ -29,8 +27,7 @@ levels.
 Having joined the room, the user can leave the room if they want. Subsequent
 server notices will then cause a new room to be created.
 
-Synapse configuration
----------------------
+## Synapse configuration
 
 Server notices come from a specific user id on the server. Server
 administrators are free to choose the user id - something like `server` is
@@ -58,17 +55,7 @@ room which will be created.
 `system_mxid_display_name` and `system_mxid_avatar_url` can be used to set the
 displayname and avatar of the Server Notices user.
 
-Sending notices
----------------
+## Sending notices
 
-As of the current version of synapse, there is no convenient interface for
-sending notices (other than the automated ones sent as part of consent
-tracking).
-
-In the meantime, it is possible to test this feature using the manhole. Having
-gone into the manhole as described in [manhole.md](manhole.md), a notice can be
-sent with something like:
-
-```
->>> hs.get_server_notices_manager().send_notice('@user:server.com', {'msgtype':'m.text', 'body':'foo'})
-```
+To send server notices to users you can use the
+[admin_api](admin_api/server_notices.md).
diff --git a/synapse/rest/__init__.py b/synapse/rest/__init__.py
index e8e1bcddea..3a24d31d1b 100644
--- a/synapse/rest/__init__.py
+++ b/synapse/rest/__init__.py
@@ -117,4 +117,6 @@ class ClientRestResource(JsonResource):
         account_validity.register_servlets(hs, client_resource)
 
         # moving to /_synapse/admin
-        synapse.rest.admin.register_servlets(hs, client_resource)
+        synapse.rest.admin.register_servlets_for_client_rest_resource(
+            hs, client_resource
+        )
diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py
index d02f5198b8..0ce89741f0 100644
--- a/synapse/rest/admin/__init__.py
+++ b/synapse/rest/admin/__init__.py
@@ -37,6 +37,7 @@ from synapse.http.servlet import (
     parse_string,
 )
 from synapse.rest.admin._base import assert_requester_is_admin, assert_user_is_admin
+from synapse.rest.admin.server_notice_servlet import SendServerNoticeServlet
 from synapse.types import UserID, create_requester
 from synapse.util.versionstring import get_version_string
 
@@ -813,16 +814,26 @@ class AccountValidityRenewServlet(RestServlet):
         }
         defer.returnValue((200, res))
 
+########################################################################################
+#
+# please don't add more servlets here: this file is already long and unwieldy. Put
+# them in separate files within the 'admin' package.
+#
+########################################################################################
+
 
 class AdminRestResource(JsonResource):
     """The REST resource which gets mounted at /_synapse/admin"""
 
     def __init__(self, hs):
         JsonResource.__init__(self, hs, canonical_json=False)
-        register_servlets(hs, self)
+
+        register_servlets_for_client_rest_resource(hs, self)
+        SendServerNoticeServlet(hs).register(self)
 
 
-def register_servlets(hs, http_server):
+def register_servlets_for_client_rest_resource(hs, http_server):
+    """Register only the servlets which need to be exposed on /_matrix/client/xxx"""
     WhoisRestServlet(hs).register(http_server)
     PurgeMediaCacheRestServlet(hs).register(http_server)
     PurgeHistoryStatusRestServlet(hs).register(http_server)
@@ -839,3 +850,5 @@ def register_servlets(hs, http_server):
     VersionServlet(hs).register(http_server)
     DeleteGroupAdminRestServlet(hs).register(http_server)
     AccountValidityRenewServlet(hs).register(http_server)
+    # don't add more things here: new servlets should only be exposed on
+    # /_synapse/admin so should not go here. Instead register them in AdminRestResource.
diff --git a/synapse/rest/admin/server_notice_servlet.py b/synapse/rest/admin/server_notice_servlet.py
new file mode 100644
index 0000000000..ae5aca9dac
--- /dev/null
+++ b/synapse/rest/admin/server_notice_servlet.py
@@ -0,0 +1,100 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 New Vector Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import re
+
+from twisted.internet import defer
+
+from synapse.api.constants import EventTypes
+from synapse.api.errors import SynapseError
+from synapse.http.servlet import (
+    RestServlet,
+    assert_params_in_dict,
+    parse_json_object_from_request,
+)
+from synapse.rest.admin import assert_requester_is_admin
+from synapse.rest.client.transactions import HttpTransactionCache
+from synapse.types import UserID
+
+
+class SendServerNoticeServlet(RestServlet):
+    """Servlet which will send a server notice to a given user
+
+    POST /_synapse/admin/v1/send_server_notice
+    {
+        "user_id": "@target_user:server_name",
+        "content": {
+            "msgtype": "m.text",
+            "body": "This is my message"
+        }
+    }
+
+    returns:
+
+    {
+        "event_id": "$1895723857jgskldgujpious"
+    }
+    """
+    def __init__(self, hs):
+        """
+        Args:
+            hs (synapse.server.HomeServer): server
+        """
+        self.hs = hs
+        self.auth = hs.get_auth()
+        self.txns = HttpTransactionCache(hs)
+        self.snm = hs.get_server_notices_manager()
+
+    def register(self, json_resource):
+        PATTERN = "^/_synapse/admin/v1/send_server_notice"
+        json_resource.register_paths(
+            "POST",
+            (re.compile(PATTERN + "$"), ),
+            self.on_POST,
+        )
+        json_resource.register_paths(
+            "PUT",
+            (re.compile(PATTERN + "/(?P<txn_id>[^/]*)$",), ),
+            self.on_PUT,
+        )
+
+    @defer.inlineCallbacks
+    def on_POST(self, request, txn_id=None):
+        yield assert_requester_is_admin(self.auth, request)
+        body = parse_json_object_from_request(request)
+        assert_params_in_dict(body, ("user_id", "content"))
+        event_type = body.get("type", EventTypes.Message)
+        state_key = body.get("state_key")
+
+        if not self.snm.is_enabled():
+            raise SynapseError(400, "Server notices are not enabled on this server")
+
+        user_id = body["user_id"]
+        UserID.from_string(user_id)
+        if not self.hs.is_mine_id(user_id):
+            raise SynapseError(400, "Server notices can only be sent to local users")
+
+        event = yield self.snm.send_notice(
+            user_id=body["user_id"],
+            type=event_type,
+            state_key=state_key,
+            event_content=body["content"],
+        )
+
+        defer.returnValue((200, {"event_id": event.event_id}))
+
+    def on_PUT(self, request, txn_id):
+        return self.txns.fetch_or_execute_request(
+            request, self.on_POST, request, txn_id,
+        )
diff --git a/tests/handlers/test_user_directory.py b/tests/handlers/test_user_directory.py
index 32ef83e9c0..7dd1a1daf8 100644
--- a/tests/handlers/test_user_directory.py
+++ b/tests/handlers/test_user_directory.py
@@ -30,7 +30,7 @@ class UserDirectoryTestCase(unittest.HomeserverTestCase):
 
     servlets = [
         login.register_servlets,
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         room.register_servlets,
     ]
 
@@ -328,7 +328,7 @@ class TestUserDirSearchDisabled(unittest.HomeserverTestCase):
         user_directory.register_servlets,
         room.register_servlets,
         login.register_servlets,
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
     ]
 
     def make_homeserver(self, reactor, clock):
diff --git a/tests/push/test_email.py b/tests/push/test_email.py
index e29bd18ad7..325ea449ae 100644
--- a/tests/push/test_email.py
+++ b/tests/push/test_email.py
@@ -34,7 +34,7 @@ class EmailPusherTests(HomeserverTestCase):
 
     skip = "No Jinja installed" if not load_jinja2_templates else None
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         room.register_servlets,
         login.register_servlets,
     ]
diff --git a/tests/push/test_http.py b/tests/push/test_http.py
index 3f9f56bb79..13bd2c8688 100644
--- a/tests/push/test_http.py
+++ b/tests/push/test_http.py
@@ -33,7 +33,7 @@ class HTTPPusherTests(HomeserverTestCase):
 
     skip = "No Jinja installed" if not load_jinja2_templates else None
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         room.register_servlets,
         login.register_servlets,
     ]
diff --git a/tests/rest/admin/test_admin.py b/tests/rest/admin/test_admin.py
index 42858b5fea..db4cfd8550 100644
--- a/tests/rest/admin/test_admin.py
+++ b/tests/rest/admin/test_admin.py
@@ -30,7 +30,7 @@ from tests import unittest
 class VersionTestCase(unittest.HomeserverTestCase):
 
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         login.register_servlets,
     ]
 
@@ -63,7 +63,7 @@ class VersionTestCase(unittest.HomeserverTestCase):
 
 class UserRegisterTestCase(unittest.HomeserverTestCase):
 
-    servlets = [synapse.rest.admin.register_servlets]
+    servlets = [synapse.rest.admin.register_servlets_for_client_rest_resource]
 
     def make_homeserver(self, reactor, clock):
 
@@ -359,7 +359,7 @@ class UserRegisterTestCase(unittest.HomeserverTestCase):
 
 class ShutdownRoomTestCase(unittest.HomeserverTestCase):
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         login.register_servlets,
         events.register_servlets,
         room.register_servlets,
@@ -496,7 +496,7 @@ class ShutdownRoomTestCase(unittest.HomeserverTestCase):
 
 class DeleteGroupTestCase(unittest.HomeserverTestCase):
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         login.register_servlets,
         groups.register_servlets,
     ]
diff --git a/tests/rest/client/test_consent.py b/tests/rest/client/test_consent.py
index 36e6c1c67d..5528971190 100644
--- a/tests/rest/client/test_consent.py
+++ b/tests/rest/client/test_consent.py
@@ -32,7 +32,7 @@ except Exception:
 class ConsentResourceTestCase(unittest.HomeserverTestCase):
     skip = "No Jinja installed" if not load_jinja2_templates else None
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         room.register_servlets,
         login.register_servlets,
     ]
diff --git a/tests/rest/client/test_identity.py b/tests/rest/client/test_identity.py
index d4fe0aee7d..2e51ffa418 100644
--- a/tests/rest/client/test_identity.py
+++ b/tests/rest/client/test_identity.py
@@ -24,7 +24,7 @@ from tests import unittest
 class IdentityTestCase(unittest.HomeserverTestCase):
 
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         room.register_servlets,
         login.register_servlets,
     ]
diff --git a/tests/rest/client/v1/test_events.py b/tests/rest/client/v1/test_events.py
index 5cb1c1ae9f..8a9a55a527 100644
--- a/tests/rest/client/v1/test_events.py
+++ b/tests/rest/client/v1/test_events.py
@@ -29,7 +29,7 @@ class EventStreamPermissionsTestCase(unittest.HomeserverTestCase):
     servlets = [
         events.register_servlets,
         room.register_servlets,
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         login.register_servlets,
     ]
 
diff --git a/tests/rest/client/v1/test_login.py b/tests/rest/client/v1/test_login.py
index 8d9ef877f6..9ebd91f678 100644
--- a/tests/rest/client/v1/test_login.py
+++ b/tests/rest/client/v1/test_login.py
@@ -11,7 +11,7 @@ LOGIN_URL = b"/_matrix/client/r0/login"
 class LoginRestServletTestCase(unittest.HomeserverTestCase):
 
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         login.register_servlets,
     ]
 
diff --git a/tests/rest/client/v1/test_rooms.py b/tests/rest/client/v1/test_rooms.py
index 1a34924f3e..521ac80f9a 100644
--- a/tests/rest/client/v1/test_rooms.py
+++ b/tests/rest/client/v1/test_rooms.py
@@ -804,7 +804,7 @@ class RoomMessageListTestCase(RoomBase):
 
 class RoomSearchTestCase(unittest.HomeserverTestCase):
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         room.register_servlets,
         login.register_servlets,
     ]
diff --git a/tests/rest/client/v2_alpha/test_auth.py b/tests/rest/client/v2_alpha/test_auth.py
index 67021185d0..0ca3c4657b 100644
--- a/tests/rest/client/v2_alpha/test_auth.py
+++ b/tests/rest/client/v2_alpha/test_auth.py
@@ -27,7 +27,7 @@ class FallbackAuthTests(unittest.HomeserverTestCase):
 
     servlets = [
         auth.register_servlets,
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         register.register_servlets,
     ]
     hijack_auth = False
diff --git a/tests/rest/client/v2_alpha/test_capabilities.py b/tests/rest/client/v2_alpha/test_capabilities.py
index 8134163e20..f3ef977404 100644
--- a/tests/rest/client/v2_alpha/test_capabilities.py
+++ b/tests/rest/client/v2_alpha/test_capabilities.py
@@ -23,7 +23,7 @@ from tests import unittest
 class CapabilitiesTestCase(unittest.HomeserverTestCase):
 
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         capabilities.register_servlets,
         login.register_servlets,
     ]
diff --git a/tests/rest/client/v2_alpha/test_register.py b/tests/rest/client/v2_alpha/test_register.py
index 4d698af03a..1c3a621d26 100644
--- a/tests/rest/client/v2_alpha/test_register.py
+++ b/tests/rest/client/v2_alpha/test_register.py
@@ -199,7 +199,7 @@ class AccountValidityTestCase(unittest.HomeserverTestCase):
 
     servlets = [
         register.register_servlets,
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         login.register_servlets,
         sync.register_servlets,
         account_validity.register_servlets,
@@ -308,7 +308,7 @@ class AccountValidityRenewalByEmailTestCase(unittest.HomeserverTestCase):
     skip = "No Jinja installed" if not load_jinja2_templates else None
     servlets = [
         register.register_servlets,
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         login.register_servlets,
         sync.register_servlets,
         account_validity.register_servlets,
diff --git a/tests/rest/client/v2_alpha/test_sync.py b/tests/rest/client/v2_alpha/test_sync.py
index 65fac1d5ce..71895094bd 100644
--- a/tests/rest/client/v2_alpha/test_sync.py
+++ b/tests/rest/client/v2_alpha/test_sync.py
@@ -73,7 +73,7 @@ class FilterTestCase(unittest.HomeserverTestCase):
 class SyncTypingTests(unittest.HomeserverTestCase):
 
     servlets = [
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         room.register_servlets,
         login.register_servlets,
         sync.register_servlets,
diff --git a/tests/server_notices/test_consent.py b/tests/server_notices/test_consent.py
index e8b8ac5725..e0b4e0eb63 100644
--- a/tests/server_notices/test_consent.py
+++ b/tests/server_notices/test_consent.py
@@ -23,7 +23,7 @@ class ConsentNoticesTests(unittest.HomeserverTestCase):
 
     servlets = [
         sync.register_servlets,
-        synapse.rest.admin.register_servlets,
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
         login.register_servlets,
         room.register_servlets,
     ]
diff --git a/tests/storage/test_client_ips.py b/tests/storage/test_client_ips.py
index b0f6fd34d8..b62eae7abc 100644
--- a/tests/storage/test_client_ips.py
+++ b/tests/storage/test_client_ips.py
@@ -206,7 +206,10 @@ class ClientIpStoreTestCase(unittest.HomeserverTestCase):
 
 class ClientIpAuthTestCase(unittest.HomeserverTestCase):
 
-    servlets = [synapse.rest.admin.register_servlets, login.register_servlets]
+    servlets = [
+        synapse.rest.admin.register_servlets_for_client_rest_resource,
+        login.register_servlets,
+    ]
 
     def make_homeserver(self, reactor, clock):
         hs = self.setup_test_homeserver()