refactor: Pages folder structure

lib/widgets/permission_slider_dialog.dart

@@ -0,0 +1,99 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+
+import 'package:fluffychat/utils/platform_infos.dart';
+import 'package:fluffychat/widgets/adaptive_flat_button.dart';
+
+class PermissionSliderDialog extends StatefulWidget {
+  const PermissionSliderDialog({
+    Key key,
+    this.initialPermission = 0,
+  }) : super(key: key);
+
+  Future<int> show(BuildContext context) => PlatformInfos.isCupertinoStyle
+      ? showCupertinoDialog<int>(
+          context: context,
+          builder: (context) => this,
+          useRootNavigator: false,
+        )
+      : showDialog<int>(
+          context: context,
+          builder: (context) => this,
+          useRootNavigator: false,
+        );
+
+  final int initialPermission;
+  @override
+  _PermissionSliderDialogState createState() => _PermissionSliderDialogState();
+}
+
+class _PermissionSliderDialogState extends State<PermissionSliderDialog> {
+  int _permission;
+  @override
+  void initState() {
+    _permission = widget.initialPermission;
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final slider = PlatformInfos.isCupertinoStyle
+        ? CupertinoSlider(
+            value: _permission.toDouble(),
+            onChanged: (d) => setState(() => _permission = d.round()),
+            max: 100.0,
+            min: 0.0,
+          )
+        : Slider(
+            value: _permission.toDouble(),
+            onChanged: (d) => setState(() => _permission = d.round()),
+            max: 100.0,
+            min: 0.0,
+          );
+    final title = Text(
+      L10n.of(context).setPermissionsLevel,
+      textAlign: TextAlign.center,
+    );
+    final content = Column(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        Text('Level: ' +
+            (_permission == 100
+                ? '$_permission (${L10n.of(context).admin})'
+                : _permission >= 50
+                    ? '$_permission (${L10n.of(context).moderator})'
+                    : _permission.toString())),
+        SizedBox(
+          height: 56,
+          child: slider,
+        ),
+      ],
+    );
+    final buttons = [
+      AdaptiveFlatButton(
+        label: L10n.of(context).cancel,
+        onPressed: () =>
+            Navigator.of(context, rootNavigator: false).pop<int>(null),
+      ),
+      AdaptiveFlatButton(
+        label: L10n.of(context).confirm,
+        onPressed: () =>
+            Navigator.of(context, rootNavigator: false).pop<int>(_permission),
+      ),
+    ];
+    if (PlatformInfos.isCupertinoStyle) {
+      return CupertinoAlertDialog(
+        title: title,
+        content: content,
+        actions: buttons,
+      );
+    }
+    return AlertDialog(
+      title: title,
+      content: content,
+      actions: buttons,
+    );
+  }
+}