Add a confirmation dialog before signing out

app/lib/l10n/app_en.arb

@@ -1423,6 +1423,15 @@
 	"@setAsTooltip": {
 		"description": "e.g., set as wallpaper"
 	},
+	"deleteAccountConfirmDialogText": "You are about to sign out from {server}",
+	"@deleteAccountConfirmDialogText": {
+		"description": "Confirmation dialog when deleting an account (i.e., signing out)",
+		"placeholders": {
+			"server": {
+				"example": "http://www.example.com"
+			}
+		}
+	},
 
 	"errorUnauthenticated": "Unauthenticated access. Please sign-in again if the problem continues",
 	"@errorUnauthenticated": {

app/lib/l10n/untranslated-messages.txt

@@ -18,7 +18,8 @@
     "removeCollectionsFailedNotification",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "de": [
@@ -108,6 +109,7 @@
     "accountSettingsTooltip",
     "contributorsTooltip",
     "setAsTooltip",
+    "deleteAccountConfirmDialogText",
     "errorAlbumDowngrade"
   ],
 
@@ -219,7 +221,8 @@
     "removeCollectionsFailedNotification",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "es": [
@@ -230,7 +233,8 @@
     "searchLandingPeopleListEmptyText2",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "fi": [
@@ -241,7 +245,8 @@
     "searchLandingPeopleListEmptyText2",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "fr": [
@@ -372,7 +377,8 @@
     "removeCollectionsFailedNotification",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "it": [
@@ -678,6 +684,7 @@
     "accountSettingsTooltip",
     "contributorsTooltip",
     "setAsTooltip",
+    "deleteAccountConfirmDialogText",
     "errorUnauthenticated",
     "errorDisconnected",
     "errorLocked",
@@ -1029,6 +1036,7 @@
     "accountSettingsTooltip",
     "contributorsTooltip",
     "setAsTooltip",
+    "deleteAccountConfirmDialogText",
     "errorUnauthenticated",
     "errorDisconnected",
     "errorLocked",
@@ -1181,7 +1189,8 @@
     "removeCollectionsFailedNotification",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "pt": [
@@ -1203,7 +1212,8 @@
     "removeCollectionsFailedNotification",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "ru": [
@@ -1330,7 +1340,8 @@
     "removeCollectionsFailedNotification",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "zh": [
@@ -1457,7 +1468,8 @@
     "removeCollectionsFailedNotification",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ],
 
   "zh_Hant": [
@@ -1584,6 +1596,7 @@
     "removeCollectionsFailedNotification",
     "accountSettingsTooltip",
     "contributorsTooltip",
-    "setAsTooltip"
+    "setAsTooltip",
+    "deleteAccountConfirmDialogText"
   ]
 }

app/lib/widget/account_picker_dialog.dart

@@ -356,12 +356,22 @@ class _AccountView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final accountLabel = AccountPref.of(account).getAccountLabel();
     return _AccountTile(
       account: account,
       trailing: IconButton(
         icon: const Icon(Icons.close),
         tooltip: L10n.global().deleteTooltip,
-        onPressed: () {
+        onPressed: () async {
+          final result = await showDialog<bool>(
+            context: context,
+            builder: (_) => _DeleteAccountConfirmDialog(
+              accountLabel: accountLabel ?? account.address,
+            ),
+          );
+          if (!context.mounted || result != true) {
+            return;
+          }
           context.read<_Bloc>().add(_DeleteAccount(account));
         },
       ),
@@ -468,3 +478,32 @@ class _AboutChin extends StatelessWidget {
 
   static final _seed = Random().nextInt(65536);
 }
+
+class _DeleteAccountConfirmDialog extends StatelessWidget {
+  const _DeleteAccountConfirmDialog({
+    required this.accountLabel,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      content: Text(L10n.global().deleteAccountConfirmDialogText(accountLabel)),
+      actions: [
+        TextButton(
+          onPressed: () {
+            Navigator.of(context).pop(false);
+          },
+          child: Text(MaterialLocalizations.of(context).cancelButtonLabel),
+        ),
+        TextButton(
+          onPressed: () {
+            Navigator.of(context).pop(true);
+          },
+          child: Text(MaterialLocalizations.of(context).okButtonLabel),
+        ),
+      ],
+    );
+  }
+
+  final String accountLabel;
+}