Show error messages on login screen

TODO.md

@@ -41,6 +41,7 @@
   - When starting a long task, e.g. importing keys, quitting the page,
     and coming back, show the buttons as still loading until operation is done
   - Make invite/left banners look better in column mode
+  - Responses
   - Messages editing
   - Code highlighting
   - Support GIF avatars
@@ -100,6 +101,7 @@
     - Accent color from background
   - Settings page
   - Message/text selection
+  - Notifications
 
   - Custom file picker for Linux...
 

src/python/backend.py

@@ -46,17 +46,22 @@ class Backend:
     # Clients management
 
     async def login_client(self,
-                           user:       str,
-                           password:   str,
-                           device_id:  Optional[str] = None,
-                           homeserver: str = "https://matrix.org") -> str:
+        user:       str,
+        password:   str,
+        device_id:  Optional[str] = None,
+        homeserver: str = "https://matrix.org",
+    ) -> Tuple[bool, str]:
         client = MatrixClient(
             self, user=user, homeserver=homeserver, device_id=device_id,
         )
-        await client.login(password)
+        try:
+            await client.login(password)
+        except RuntimeError as err:
+            return (False, err.args[0].message)
+
         self.clients[client.user_id]         = client
         self.models[Account][client.user_id] = Account(client.user_id)
-        return client.user_id
+        return (True, client.user_id)
 
 
     async def resume_client(self,

src/python/matrix_client.py

@@ -112,7 +112,7 @@ class MatrixClient(nio.AsyncClient):
         )
 
         if isinstance(response, nio.LoginError):
-            log.error(response)
+            raise RuntimeError(response)
         else:
             await self.start()
 
@@ -497,7 +497,7 @@ class MatrixClient(nio.AsyncClient):
 
 
     async def onErrorResponse(self, resp: nio.ErrorResponse) -> None:
-        # TODO: show something in the client
+        # TODO: show something in the client, must be seen on login screen too
         try:
             log.warning("%s - %s", resp, json.dumps(resp.__dict__, indent=4))
         except Exception:

src/qml/Pages/SignIn.qml

@@ -26,8 +26,14 @@ Item {
                 button.loading = true
                 let args = [idField.text, passwordField.text]
 
-                py.callCoro("login_client", args, userId => {
-                    pageStack.showPage("RememberAccount", {loginWith, userId})
+                py.callCoro("login_client", args, ([success, data]) => {
+                    if (success) {
+                        // data = userId
+                        errorMessage.text = ""
+                        pageStack.showPage("RememberAccount", {loginWith,data})
+                    } else {
+                        errorMessage.text = qsTr(data)
+                    }
                     button.loading = false
                 })
             },
@@ -77,5 +83,19 @@ Item {
             Layout.fillWidth: true
             Layout.margins: signInBox.margins
         }
+
+        HLabel {
+            id: errorMessage
+            wrapMode: Text.Wrap
+            horizontalAlignment: Text.AlignHCenter
+            color: theme.colors.errorText
+
+            visible: Layout.maximumHeight > 0
+            Layout.maximumHeight: text ? implicitHeight : 0
+            Behavior on Layout.maximumHeight { HNumberAnimation {} }
+
+            Layout.fillWidth: true
+            Layout.margins: signInBox.margins
+        }
     }
 }

src/themes/Default.qpl

@@ -53,6 +53,8 @@ colors:
     color halfDimText: hsluv(0, 0, intensity * 70)
     color dimText:     hsluv(0, 0, intensity * 55)
     color dimmerText:  hsluv(0, 0, intensity * 30)
+
+    color errorText:   hsluv(0, saturation * 2.25, 50)
     color accentText:  hsluv(hue - 80, saturation * 2.25, 60)
     color link:        accentText
     color code:        hsluv(hue + 5, saturation * 1.5, intensity * 60)