Remove unsupported in flutter push admin methods. Cleanup button constructors.

Author: maratal

src/pages/docs/push/getting-started/flutter.mdx

@@ -385,30 +385,31 @@ Widget build(BuildContext context) {
           const SizedBox(height: 12),
           ElevatedButton(
             onPressed: _activatePush,
-            style:
-                ElevatedButton.styleFrom(backgroundColor: Colors.green),
-            child: const Text('Activate Push',
-                style: TextStyle(color: Colors.white)),
+            style: ElevatedButton.styleFrom(
+                backgroundColor: Colors.green,
+                foregroundColor: Colors.white),
+            child: const Text('Activate Push'),
           ),
           ElevatedButton(
             onPressed: _deactivatePush,
-            style: ElevatedButton.styleFrom(backgroundColor: Colors.red),
-            child: const Text('Deactivate Push',
-                style: TextStyle(color: Colors.white)),
+            style: ElevatedButton.styleFrom(
+                backgroundColor: Colors.red,
+                foregroundColor: Colors.white),
+            child: const Text('Deactivate Push'),
           ),
           ElevatedButton(
             onPressed: _subscribeToChannel,
             style: ElevatedButton.styleFrom(
-                backgroundColor: Colors.purple),
-            child: const Text('Subscribe to Channel',
-                style: TextStyle(color: Colors.white)),
+                backgroundColor: Colors.purple,
+                foregroundColor: Colors.white),
+            child: const Text('Subscribe to Channel'),
           ),
           ElevatedButton(
             onPressed: _unsubscribeFromChannel,
             style: ElevatedButton.styleFrom(
-                backgroundColor: Colors.orange),
-            child: const Text('Unsubscribe from Channel',
-                style: TextStyle(color: Colors.white)),
+                backgroundColor: Colors.orange,
+                foregroundColor: Colors.white),
+            child: const Text('Unsubscribe from Channel'),
           ),
           const SizedBox(height: 12),
           Expanded(
@@ -455,59 +456,17 @@ ably channels publish exampleChannel1 '{"name":"example","data":"Hello from CLI!
 
 ## Step 5: Send push with code <a id="step-5"/>
 
-Just as you can send push notifications through the Ably CLI or dashboard, you can also send them directly from your app using `deviceId`, `clientId`, or channel publishing methods. Add the following methods to `_PushHomePageState`:
+The `ably_flutter` SDK does not implement the Push Admin API, so sending push directly to a `deviceId` or `clientId` from a Flutter client is not supported. Use the [Ably REST API](/docs/api/rest-sdk) from your backend server for direct push.
 
-<Code>
-```flutter
-Future<void> _sendPushToDevice() async {
-  try {
-    final device = await AblyService().realtime.device();
-    await AblyService().realtime.push.admin.publish(
-      {'deviceId': device.id},
-      {
-        'notification': {
-          'title': 'Push Tutorial',
-          'body': 'Hello from device ID!',
-        },
-        'data': {'foo': 'bar', 'baz': 'qux'},
-      },
-    );
-    _updateStatus('Push sent to device ID: ${device.id}');
-  } catch (e) {
-    _updateStatus('Failed to send push to device: $e');
-  }
-}
-
-Future<void> _sendPushToClient() async {
-  try {
-    final clientId = AblyService().realtime.auth.clientId;
-    await AblyService().realtime.push.admin.publish(
-      {'clientId': clientId},
-      {
-        'notification': {
-          'title': 'Push Tutorial',
-          'body': 'Hello from client ID!',
-        },
-        'data': {'foo': 'bar', 'baz': 'qux'},
-      },
-    );
-    _updateStatus('Push sent to client ID: $clientId');
-  } catch (e) {
-    _updateStatus('Failed to send push to client: $e');
-  }
-}
-```
-</Code>
-
-Sending to a channel is just publishing a message with a `push` `extras` field:
+From the Flutter app itself, send push by publishing a message to a channel with a `push` `extras` field. Any device subscribed to that channel (via Step 3) will receive the notification. Add the following method to `_PushHomePageState`:
 
 <Code>
 ```flutter
 Future<void> _sendPushToChannel() async {
   try {
     final channel = AblyService().realtime.channels.get(_channelName);
     await channel.publish(
-      ably.Message(
+      message: ably.Message(
         name: 'example',
         data: 'Hello from channel!',
         extras: ably.MessageExtras({
@@ -529,32 +488,21 @@ Future<void> _sendPushToChannel() async {
 ```
 </Code>
 
-Add three more buttons to the `children` list in the `build` method, before the `Expanded` log widget:
+Add a button to the `children` list in the `build` method, before the `Expanded` log widget:
 
 <Code>
 ```flutter
-ElevatedButton(
-  onPressed: _sendPushToDevice,
-  style: ElevatedButton.styleFrom(backgroundColor: const Color(0xFF6610F2)),
-  child: const Text('Send Push to Device',
-      style: TextStyle(color: Colors.white)),
-),
-ElevatedButton(
-  onPressed: _sendPushToClient,
-  style: ElevatedButton.styleFrom(backgroundColor: const Color(0xFF20C997)),
-  child: const Text('Send Push to Client',
-      style: TextStyle(color: Colors.white)),
-),
 ElevatedButton(
   onPressed: _sendPushToChannel,
-  style: ElevatedButton.styleFrom(backgroundColor: const Color(0xFF17A2B8)),
-  child: const Text('Send Push to Channel',
-      style: TextStyle(color: Colors.white)),
+  style: ElevatedButton.styleFrom(
+      backgroundColor: Colors.blue,
+      foregroundColor: Colors.white),
+  child: const Text('Send Push to Channel'),
 ),
 ```
 </Code>
 
-Build and run the app again. Use the new buttons to send push notifications directly to your device ID, client ID, or the subscribed channel.
+Build and run the app again. Tap **Subscribe to Channel** first, then **Send Push to Channel** to send a push notification to all subscribed devices.
 
 ## Next steps <a id="next-steps"/>