Implement updating devices

You can update the displayname of devices now.

synapse/handlers/device.py

@@ -141,6 +141,30 @@ class DeviceHandler(BaseHandler):
         yield self.store.user_delete_access_tokens(user_id,
                                                    device_id=device_id)
 
+    @defer.inlineCallbacks
+    def update_device(self, user_id, device_id, content):
+        """ Update the given device
+
+        Args:
+            user_id (str):
+            device_id (str):
+            content (dict): body of update request
+
+        Returns:
+            defer.Deferred:
+        """
+
+        try:
+            yield self.store.update_device(
+                user_id,
+                device_id,
+                new_display_name=content.get("display_name")
+            )
+        except errors.StoreError, e:
+            if e.code == 404:
+                raise errors.NotFoundError()
+            else:
+                raise
 
 
 def _update_device_from_client_ips(device, client_ips):

synapse/rest/client/v2_alpha/devices.py

@@ -13,19 +13,17 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from twisted.internet import defer
-
-from synapse.http.servlet import RestServlet
-
-from ._base import client_v2_patterns
-
 import logging
 
+from twisted.internet import defer
+
+from synapse.http import servlet
+from ._base import client_v2_patterns
 
 logger = logging.getLogger(__name__)
 
 
-class DevicesRestServlet(RestServlet):
+class DevicesRestServlet(servlet.RestServlet):
     PATTERNS = client_v2_patterns("/devices$", releases=[], v2_alpha=False)
 
     def __init__(self, hs):
@@ -47,7 +45,7 @@ class DevicesRestServlet(RestServlet):
         defer.returnValue((200, {"devices": devices}))
 
 
-class DeviceRestServlet(RestServlet):
+class DeviceRestServlet(servlet.RestServlet):
     PATTERNS = client_v2_patterns("/devices/(?P<device_id>[^/]*)$",
                                   releases=[], v2_alpha=False)
 
@@ -84,6 +82,18 @@ class DeviceRestServlet(RestServlet):
         )
         defer.returnValue((200, {}))
 
+    @defer.inlineCallbacks
+    def on_PUT(self, request, device_id):
+        requester = yield self.auth.get_user_by_req(request)
+
+        body = servlet.parse_json_object_from_request(request)
+        yield self.device_handler.update_device(
+            requester.user.to_string(),
+            device_id,
+            body
+        )
+        defer.returnValue((200, {}))
+
 
 def register_servlets(hs, http_server):
     DevicesRestServlet(hs).register(http_server)

synapse/storage/devices.py

@@ -81,7 +81,7 @@ class DeviceStore(SQLBaseStore):
 
         Args:
             user_id (str): The ID of the user which owns the device
-            device_id (str): The ID of the device to retrieve
+            device_id (str): The ID of the device to delete
         Returns:
             defer.Deferred
         """
@@ -91,6 +91,31 @@ class DeviceStore(SQLBaseStore):
             desc="delete_device",
         )
 
+    def update_device(self, user_id, device_id, new_display_name=None):
+        """Update a device.
+
+        Args:
+            user_id (str): The ID of the user which owns the device
+            device_id (str): The ID of the device to update
+            new_display_name (str|None): new displayname for device; None
+               to leave unchanged
+        Raises:
+            StoreError: if the device is not found
+        Returns:
+            defer.Deferred
+        """
+        updates = {}
+        if new_display_name is not None:
+            updates["display_name"] = new_display_name
+        if not updates:
+            return defer.succeed(None)
+        return self._simple_update_one(
+            table="devices",
+            keyvalues={"user_id": user_id, "device_id": device_id},
+            updatevalues=updates,
+            desc="update_device",
+        )
+
     @defer.inlineCallbacks
     def get_devices_by_user(self, user_id):
         """Retrieve all of a user's registered devices.

tests/handlers/test_device.py

@@ -140,6 +140,22 @@ class DeviceTestCase(unittest.TestCase):
         # we'd like to check the access token was invalidated, but that's a
         # bit of a PITA.
 
+    @defer.inlineCallbacks
+    def test_update_device(self):
+        yield self._record_users()
+
+        update = {"display_name": "new display"}
+        yield self.handler.update_device(user1, "abc", update)
+
+        res = yield self.handler.get_device(user1, "abc")
+        self.assertEqual(res["display_name"], "new display")
+
+    @defer.inlineCallbacks
+    def test_update_unknown_device(self):
+        update = {"display_name": "new_display"}
+        with self.assertRaises(synapse.api.errors.NotFoundError):
+            yield self.handler.update_device("user_id", "unknown_device_id",
+                                             update)
 
     @defer.inlineCallbacks
     def _record_users(self):

tests/storage/test_devices.py

@@ -15,6 +15,7 @@
 
 from twisted.internet import defer
 
+import synapse.api.errors
 import tests.unittest
 import tests.utils
 
@@ -67,3 +68,38 @@ class DeviceStoreTestCase(tests.unittest.TestCase):
             "device_id": "device2",
             "display_name": "display_name 2",
         }, res["device2"])
+
+    @defer.inlineCallbacks
+    def test_update_device(self):
+        yield self.store.store_device(
+            "user_id", "device_id", "display_name 1"
+        )
+
+        res = yield self.store.get_device("user_id", "device_id")
+        self.assertEqual("display_name 1", res["display_name"])
+
+        # do a no-op first
+        yield self.store.update_device(
+            "user_id", "device_id",
+        )
+        res = yield self.store.get_device("user_id", "device_id")
+        self.assertEqual("display_name 1", res["display_name"])
+
+        # do the update
+        yield self.store.update_device(
+            "user_id", "device_id",
+            new_display_name="display_name 2",
+        )
+
+        # check it worked
+        res = yield self.store.get_device("user_id", "device_id")
+        self.assertEqual("display_name 2", res["display_name"])
+
+    @defer.inlineCallbacks
+    def test_update_unknown_device(self):
+        with self.assertRaises(synapse.api.errors.StoreError) as cm:
+            yield self.store.update_device(
+                "user_id", "unknown_device_id",
+                new_display_name="display_name 2",
+            )
+        self.assertEqual(404, cm.exception.code)