change: Chat backup dialog as a banner

assets/l10n/intl_en.arb

@@ -2615,5 +2615,7 @@
   "openGallery": "Open gallery",
   "removeFromSpace": "Remove from space",
   "removeFromSpaceDescription": "This removes this chat from the current space. It will then still be visible under \"All chats\".",
-  "addToSpaceDescription": "Select a space to add this chat to it."
+  "addToSpaceDescription": "Select a space to add this chat to it.",
+  "start": "Start",
+  "setupChatBackupNow": "Set up your chat backup now"
 }

lib/pages/bootstrap/bootstrap_dialog.dart

@@ -57,14 +57,18 @@ class _BootstrapDialogState extends State<BootstrapDialog> {
 
   bool _wipe;
 
+  @override
+  void initState() {
+    _createBootstrap(widget.wipe);
+    super.initState();
+  }
+
   void _createBootstrap(bool wipe) {
-    setState(() {
+    _wipe = wipe;
-      _wipe = wipe;
+    titleText = null;
-      titleText = null;
+    _recoveryKeyStored = false;
-      _recoveryKeyStored = false;
+    bootstrap = widget.client.encryption
-      bootstrap = widget.client.encryption
+        .bootstrap(onUpdate: () => setState(() => null));
-          .bootstrap(onUpdate: () => setState(() => null));
-    });
   }
 
   @override
@@ -76,20 +80,7 @@ class _BootstrapDialogState extends State<BootstrapDialog> {
         : const LinearProgressIndicator();
     titleText = L10n.of(context).loadingPleaseWait;
 
-    if (bootstrap == null) {
+    if (bootstrap.newSsssKey?.recoveryKey != null &&
-      titleText = L10n.of(context).setupChatBackup;
-      body = Column(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          Image.asset('assets/backup.png', fit: BoxFit.contain),
-          Text(L10n.of(context).setupChatBackupDescription),
-        ],
-      );
-      buttons.add(AdaptiveFlatButton(
-        label: L10n.of(context).next,
-        onPressed: () => _createBootstrap(false),
-      ));
-    } else if (bootstrap.newSsssKey?.recoveryKey != null &&
         _recoveryKeyStored == false) {
       final key = bootstrap.newSsssKey.recoveryKey;
       titleText = L10n.of(context).securityKey;
@@ -183,6 +174,11 @@ class _BootstrapDialogState extends State<BootstrapDialog> {
                 child: ListView(
                   padding: const EdgeInsets.all(16.0),
                   children: [
+                    Text(
+                      L10n.of(context).setupChatBackupDescription,
+                      textAlign: TextAlign.center,
+                    ),
+                    const SizedBox(height: 16),
                     TextField(
                       minLines: 4,
                       maxLines: 4,
@@ -275,7 +271,7 @@ class _BootstrapDialogState extends State<BootstrapDialog> {
                               cancelLabel: L10n.of(context).cancel,
                               isDestructiveAction: true,
                             )) {
-                          _createBootstrap(true);
+                          setState(() => _createBootstrap(true));
                         }
                       },
                     )

lib/pages/chat_list/chat_list.dart

@@ -79,13 +79,13 @@ class ChatListController extends State<ChatList> {
 
   final selectedRoomIds = <String>{};
   bool crossSigningCached;
-  bool hideChatBackupBanner = false;
+  bool showChatBackupBanner = false;
-
-  void hideChatBackupBannerAction() =>
-      setState(() => hideChatBackupBanner = true);
 
   void firstRunBootstrapAction() async {
-    hideChatBackupBannerAction();
+    setState(() {
+      showChatBackupBanner = false;
+    });
+
     await BootstrapDialog(
       client: Matrix.of(context).client,
     ).show(context);
@@ -181,7 +181,9 @@ class ChatListController extends State<ChatList> {
             crossSigning == false;
     final isUnknownSession = Matrix.of(context).client.isUnknownSession;
     if (needsBootstrap || isUnknownSession) {
-      firstRunBootstrapAction();
+      setState(() {
+        showChatBackupBanner = true;
+      });
     }
   }
 

lib/pages/chat_list/chat_list_view.dart

@@ -182,6 +182,27 @@ class ChatListView extends StatelessWidget {
               ),
               body: Column(children: [
                 const ConnectionStatusHeader(),
+                AnimatedContainer(
+                  height: controller.showChatBackupBanner ? 54 : 0,
+                  duration: const Duration(milliseconds: 300),
+                  clipBehavior: Clip.hardEdge,
+                  curve: Curves.bounceInOut,
+                  decoration: const BoxDecoration(),
+                  child: MaterialBanner(
+                    leading: Image.asset(
+                      'assets/backup.png',
+                      fit: BoxFit.contain,
+                      width: 44,
+                    ),
+                    content: Text(L10n.of(context).setupChatBackupNow),
+                    actions: [
+                      TextButton(
+                        onPressed: controller.firstRunBootstrapAction,
+                        child: Text(L10n.of(context).start),
+                      ),
+                    ],
+                  ),
+                ),
                 Expanded(child: _ChatListViewBody(controller)),
               ]),
               floatingActionButton: selectMode == SelectMode.normal