Finish KeyToken operations

flutter/lib/pages/keytoken_view/keytoken_permission_modal.dart

@@ -0,0 +1,82 @@
+import 'package:flutter/material.dart';
+import 'package:simplecloudnotifier/models/keytoken.dart';
+
+class EditKeyTokenPermissionsDialog extends StatefulWidget {
+  final KeyTokenPreview keytoken;
+
+  final void Function(String) onUpdatePermissions;
+
+  const EditKeyTokenPermissionsDialog({
+    required this.keytoken,
+    required this.onUpdatePermissions,
+    Key? key,
+  }) : super(key: key);
+
+  @override
+  _EditKeyTokenPermissionsDialogState createState() => _EditKeyTokenPermissionsDialogState();
+}
+
+class _EditKeyTokenPermissionsDialogState extends State<EditKeyTokenPermissionsDialog> {
+  Set<String> selectedPermissions = new Set<String>();
+
+  @override
+  void initState() {
+    super.initState();
+
+    for (var p in widget.keytoken.permissions.split(';')) {
+      if (p.isNotEmpty) selectedPermissions.add(p);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      title: const Text('Permissions'),
+      content: Container(
+        width: 0,
+        height: 400,
+        child: ListView.builder(
+          shrinkWrap: true,
+          itemBuilder: (builder, index) {
+            final txt = (['Admin', 'Read messages', 'Send messages', 'Read userdata'])[index];
+            final prm = (['A', 'CR', 'CS', 'UR'])[index];
+
+            return ListTile(
+              contentPadding: EdgeInsets.fromLTRB(8, 0, 8, 0),
+              visualDensity: VisualDensity(horizontal: 0, vertical: -4),
+              title: Text(txt),
+              leading: Icon(
+                selectedPermissions.contains(prm) ? Icons.check_box : Icons.check_box_outline_blank,
+                color: Theme.of(context).primaryColor,
+              ),
+              onTap: () {
+                setState(() {
+                  if (selectedPermissions.contains(prm)) {
+                    selectedPermissions.remove(prm);
+                  } else {
+                    selectedPermissions.add(prm);
+                  }
+                });
+              },
+            );
+          },
+          itemCount: 4,
+        ),
+      ),
+      actions: <Widget>[
+        TextButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: Text('Cancel'),
+        ),
+        TextButton(
+          style: TextButton.styleFrom(textStyle: Theme.of(context).textTheme.labelLarge),
+          child: const Text('Update'),
+          onPressed: () {
+            widget.onUpdatePermissions(selectedPermissions.join(';'));
+            Navigator.of(context).pop();
+          },
+        ),
+      ],
+    );
+  }
+}