new: bulk import servers (#301)

lib/view/page/backup.dart

@@ -1,7 +1,9 @@
+import 'dart:convert';
 import 'dart:io';
 
 import 'package:computer/computer.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:toolbox/core/extension/context/common.dart';
 import 'package:toolbox/core/extension/context/dialog.dart';
 import 'package:toolbox/core/extension/context/locale.dart';
@@ -12,11 +14,15 @@ import 'package:toolbox/core/utils/sync/icloud.dart';
 import 'package:toolbox/core/utils/platform/base.dart';
 import 'package:toolbox/core/utils/share.dart';
 import 'package:toolbox/core/utils/sync/webdav.dart';
+import 'package:toolbox/core/utils/ui.dart';
 import 'package:toolbox/data/model/app/backup.dart';
+import 'package:toolbox/data/model/server/server_private_info.dart';
+import 'package:toolbox/data/res/color.dart';
 import 'package:toolbox/data/res/logger.dart';
 import 'package:toolbox/data/res/path.dart';
 import 'package:toolbox/data/res/store.dart';
 import 'package:toolbox/data/res/ui.dart';
+import 'package:toolbox/data/res/url.dart';
 import 'package:toolbox/view/widget/appbar.dart';
 import 'package:toolbox/view/widget/expand_tile.dart';
 import 'package:toolbox/view/widget/cardx.dart';
@@ -48,6 +54,7 @@ class BackupPage extends StatelessWidget {
         _buildWebdav(context),
         _buildFile(context),
         _buildClipboard(context),
+        _buildBulkImportServers(context),
       ],
     );
   }
@@ -214,6 +221,26 @@ class BackupPage extends StatelessWidget {
     );
   }
 
+  Widget _buildBulkImportServers(BuildContext context) {
+    return CardX(
+        child: ListTile(
+      title: Text(l10n.bulkImportServers),
+      subtitle: MarkdownBody(
+        data: l10n.bulkImportServersTip(Urls.appWiki),
+        styleSheet: MarkdownStyleSheet(
+            p: UIs.textGrey,
+            a: TextStyle(
+              color: primaryColor,
+            )),
+        onTapLink: (text, href, title) {
+          if (href != null) openUrl(href);
+        },
+      ),
+      trailing: const Icon(Icons.import_export),
+      onTap: () => _onBulkImportServers(context),
+    ));
+  }
+
   Future<void> _onTapFileRestore(BuildContext context) async {
     final path = await pickOneFile();
     if (path == null) return;
@@ -419,4 +446,61 @@ class BackupPage extends StatelessWidget {
       context.showSnackBar(e.toString());
     }
   }
+
+  void _onBulkImportServers(BuildContext context) async {
+    final path = await pickOneFile();
+    if (path == null) return;
+
+    final file = File(path);
+    if (!await file.exists()) {
+      context.showRoundDialog(
+        title: Text(l10n.error),
+        child: Text(l10n.fileNotExist(path)),
+      );
+      return;
+    }
+
+    final text = await file.readAsString();
+    if (text.isEmpty) {
+      context.showRoundDialog(
+        title: Text(l10n.error),
+        child: Text(l10n.fieldMustNotEmpty),
+      );
+      return;
+    }
+
+    try {
+      final spis = await context.showLoadingDialog(
+        fn: () => Computer.shared.start((val) {
+          final list = json.decode(val) as List;
+          return list.map((e) => ServerPrivateInfo.fromJson(e)).toList();
+        }, text.trim()),
+      );
+      final sure = await context.showRoundDialog<bool>(
+        title: Text(l10n.import),
+        child: Text(l10n.askContinue('${spis.length} ${l10n.server}')),
+        actions: [
+          TextButton(
+            onPressed: () => context.pop(true),
+            child: Text(l10n.ok),
+          ),
+        ],
+      );
+      if (sure == true) {
+        await context.showLoadingDialog(
+          fn: () async {
+            for (var spi in spis) {
+              Stores.server.put(spi);
+            }
+          },
+        );
+        context.showSnackBar(l10n.success);
+      }
+    } catch (e) {
+      context.showRoundDialog(
+        title: Text(l10n.error),
+        child: Text(e.toString()),
+      );
+    }
+  }
 }