Implement room creation functions

src/python/matrix_client.py

@@ -32,6 +32,10 @@ from .pyotherside_events import AlertRequested
 CryptDict = Dict[str, Any]
 
 
+@dataclass
+class RequestFailed(Exception):
+    m_code: Optional[str] = None
+
 @dataclass
 class UploadError(Exception):
     http_code: Optional[int] = None
@@ -423,6 +427,30 @@ class MatrixClient(nio.AsyncClient):
             more = await self.load_past_events(room_id)
 
 
+    async def room_create(
+        self,
+        name:     Optional[str] = None,
+        topic:    Optional[str] = None,
+        public:   bool          = False,
+        encrypt:  bool          = False,  # TODO
+        federate: bool          = True,
+    ) -> str:
+
+        response = await super().room_create(
+            name       = name,
+            topic      = topic,
+            federate   = federate,
+            visibility =
+                nio.RoomVisibility.public if public else
+                nio.RoomVisibility.private,
+        )
+
+        if isinstance(response, nio.RoomCreateError):
+            raise RequestFailed(response.status_code)
+
+        return response.room_id
+
+
     async def room_forget(self, room_id: str) -> None:
         await super().room_leave(room_id)
         await super().room_forget(room_id)

src/qml/Pages/AddChat/CreateRoom.qml

@@ -15,12 +15,32 @@ HBox {
     ]
 
     buttonCallbacks: ({
+        apply: button => {
+            button.loading = true
+
+            let args = [
+                nameField.text || null,
+                topicField.text || null,
+                publicCheckBox.checked,
+                encryptCheckBox.checked,
+                ! blockOtherServersCheckBox.checked,
+            ]
+
+            py.callClientCoro(userId, "room_create", args, roomId => {
+                button.loading = false
+                pageLoader.showRoom(userId, roomId)
             })
+        },
+    })
+
+
+    readonly property string userId: addChatPage.userId
+
 
     HRoomAvatar {
         // TODO: click to change the avatar
         id: avatar
-        clientUserId: addChatPage.userId
+        clientUserId: userId
         displayName: nameField.text
 
         Layout.alignment: Qt.AlignCenter