Show max file size on upload button tooltip

TODO.md

@@ -4,7 +4,7 @@
 
 - "exception during sync" aren't caught
 - nio ClientTimeout
-- Handle upload file size limit
+- Name
 - Update docstrings
 - Update TODO.md 
 - Update README.md

src/backend/matrix_client.py

@@ -110,9 +110,10 @@ class MatrixClient(nio.AsyncClient):
         self.backend: "Backend"  = backend
         self.models:  ModelStore = self.backend.models
 
-        self.profile_task:    Optional[asyncio.Future] = None
-        self.sync_task:       Optional[asyncio.Future] = None
-        self.load_rooms_task: Optional[asyncio.Future] = None
+        self.profile_task:       Optional[asyncio.Future] = None
+        self.server_config_task: Optional[asyncio.Future] = None
+        self.sync_task:          Optional[asyncio.Future] = None
+        self.load_rooms_task:    Optional[asyncio.Future] = None
 
         self.upload_monitors: Dict[UUID, nio.TransferMonitor] = {}
 
@@ -179,7 +180,12 @@ class MatrixClient(nio.AsyncClient):
     async def logout(self) -> None:
         """Logout from the server. This will delete the device."""
 
-        for task in (self.profile_task, self.load_rooms_task, self.sync_task):
+        tasks = (
+            self.profile_task, self.load_rooms_task, self.sync_task,
+            self.server_config_task,
+        )
+
+        for task in tasks:
             if task:
                 task.cancel()
                 with suppress(asyncio.CancelledError):
@@ -221,11 +227,34 @@ class MatrixClient(nio.AsyncClient):
             account.display_name    = resp.displayname or ""
             account.avatar_url      = resp.avatar_url or ""
 
+        def on_server_config_response(future) -> None:
+            """Update our model `Account` with the received config details."""
+
+            exception = future.exception()
+
+            if exception:
+                log.warn("On %s client startup: %r", self.user_id, exception)
+                self.server_config_task = asyncio.ensure_future(
+                    self.get_server_config(),
+                )
+                self.server_config_task.add_done_callback(
+                    on_server_config_response,
+                )
+                return
+
+            account                 = self.models["accounts"][self.user_id]
+            account.max_upload_size = future.result()
+
         self.profile_task = asyncio.ensure_future(
             self.backend.get_profile(self.user_id),
         )
         self.profile_task.add_done_callback(on_profile_response)
 
+        self.server_config_task = asyncio.ensure_future(
+            self.get_server_config(),
+        )
+        self.server_config_task.add_done_callback(on_server_config_response)
+
         while True:
             try:
                 self.sync_task = asyncio.ensure_future(
@@ -239,6 +268,11 @@ class MatrixClient(nio.AsyncClient):
                 await asyncio.sleep(2)
 
 
+    async def get_server_config(self) -> int:
+        """Return the maximum upload size on this server"""
+        return (await self.content_repository_config()).upload_size
+
+
     @property
     def all_rooms(self) -> Dict[str, nio.MatrixRoom]:
         """Return dict containing both our joined and invited rooms."""

src/backend/models/items.py

@@ -35,8 +35,9 @@ class Account(ModelItem):
     id:              str      = field()
     display_name:    str      = ""
     avatar_url:      str      = ""
-    first_sync_done: bool     = False
+    max_upload_size: int      = 0
     profile_updated: datetime = ZeroDate
+    first_sync_done: bool     = False
 
     def __lt__(self, other: "Account") -> bool:
         """Sort by display name or user ID."""

src/gui/Pages/Chat/Composer.qml

@@ -3,6 +3,7 @@
 import QtQuick 2.12
 import QtQuick.Layouts 1.12
 import Clipboard 0.1
+import CppUtils 0.1
 import "../.."
 import "../../Base"
 import "../../Dialogs"
@@ -218,7 +219,13 @@ Rectangle {
             enabled: chat.roomInfo.can_send_messages
             icon.name: "upload-file"
             backgroundColor: theme.chat.composer.uploadButton.background
-            toolTip.text: qsTr("Send files")
+            toolTip.text:
+                chat.userInfo.max_upload_size ?
+                qsTr("Send files (%1 max)").arg(
+                    CppUtils.formattedBytes(chat.userInfo.max_upload_size, 0),
+                ) :
+                qsTr("Send files")
+
             onClicked: sendFilePicker.dialog.open()
 
             Layout.fillHeight: true