fix: file explorer and support select file (#111)

ui/flutter/lib/util/file_explorer.dart

@@ -0,0 +1,47 @@
+import 'dart:io';
+
+class FileExplorer {
+  static Future<void> openAndSelectFile(String filePath) async {
+    if (!await FileSystemEntity.isDirectory(filePath) &&
+        !await FileSystemEntity.isFile(filePath)) {
+      return;
+    }
+    if (await FileSystemEntity.isDirectory(filePath)) {
+      if (Platform.isWindows) {
+        Process.run('explorer.exe', [filePath]);
+      } else if (Platform.isMacOS || Platform.isLinux) {
+        Process.run('xdg-open', [filePath]);
+      }
+    } else if (await FileSystemEntity.isFile(filePath)) {
+      if (Platform.isWindows) {
+        Process.run('explorer.exe', ['/select,', filePath]);
+      } else if (Platform.isMacOS) {
+        Process.run('open', ['-R', filePath]);
+      } else if (Platform.isLinux) {
+        if (await _isUbuntuOrDebian()) {
+          Process.run('xdg-open', [filePath]);
+        } else if (await _isCentOS()) {
+          Process.run('nautilus', ['--select', filePath]);
+        }
+      }
+    }
+  }
+
+  static Future<bool> _isUbuntuOrDebian() async {
+    final result = await Process.run('lsb_release', ['-i']);
+    if (result.exitCode != 0) {
+      return false;
+    }
+    final output = result.stdout.toString().toLowerCase();
+    return output.contains('ubuntu') || output.contains('debian');
+  }
+
+  static Future<bool> _isCentOS() async {
+    final result = await Process.run('cat', ['/etc/os-release']);
+    if (result.exitCode != 0) {
+      return false;
+    }
+    final output = result.stdout.toString().toLowerCase();
+    return output.contains('centos');
+  }
+}

ui/flutter/lib/util/util.dart

@@ -3,12 +3,11 @@ import 'dart:io';
 import 'package:flutter/foundation.dart';
 
 class Util {
-  static String buildAbsPath(String dir, String path, String name) {
-    return (dir == "" ? "" : "$dir/") + buildPath(path, name);
-  }
-
-  static String buildPath(String path, String name) {
-    return (path == "" ? "" : "$path/") + name;
+  static String safeDir(String path) {
+    if (path == "." || path == "./" || path == ".\\") {
+      return "";
+    }
+    return path;
   }
 
   static String fmtByte(int byte) {