improve download subpath

lib/appdata.dart

@@ -16,8 +16,6 @@ class _Appdata {
   Map<String, dynamic> settings = {
     "downloadPath": null,
     "downloadSubPath": r"/${id}-p${index}.${ext}",
-    "tagsWeight": "風景 ロリ 巨乳 女の子",
-    "useTranslatedNameForDownload": true,
     "maxParallels": 3,
     "proxy": "",
   };

lib/network/download.dart

@@ -127,28 +127,37 @@ class DownloadingTask {
   static String _generateFilePath(Illust illust, int index, String ext) {
     final String downloadPath = appdata.settings["downloadPath"];
     String subPathPatten = appdata.settings["downloadSubPath"];
-    final tagsWeight = (appdata.settings["tagsWeight"] as String).split(' ');
-    final originalTags = List<Tag>.from(illust.tags);
-    originalTags.sort((a, b){
-      var aWeight = tagsWeight.indexOf(a.name);
-      if(aWeight == -1) aWeight = tagsWeight.length;
-      var bWeight = tagsWeight.indexOf(b.name);
-      if(bWeight == -1) bWeight = tagsWeight.length;
-      return aWeight - bWeight;
-    });
-    final tags = appdata.settings["useTranslatedNameForDownload"] == false
-        ? originalTags.map((e) => e.name).toList()
-        : originalTags.map((e) => e.translatedName ?? e.name).toList();
-    
     subPathPatten = subPathPatten.replaceAll(r"${id}", illust.id.toString());
     subPathPatten = subPathPatten.replaceAll(r"${title}", illust.title);
     subPathPatten = subPathPatten.replaceAll(r"${author}", illust.author.name);
     subPathPatten = subPathPatten.replaceAll(r"${index}", index.toString());
     subPathPatten = subPathPatten.replaceAll(r"${ext}", ext);
-    for(int i=0; i<tags.length; i++) {
-      subPathPatten = subPathPatten.replaceAll("\${tag$i}", tags[i]);
+    subPathPatten = subPathPatten.replaceAll(r"${AI}", illust.isAi ? "AI" : "");
+    List<String> extractTags(String input) {
+      final regex = RegExp(r'\$\{tag\((.*?)\)\}');
+      final matches = regex.allMatches(input);
+      return matches.map((match) => match.group(1)!).toList();
     }
-    return "$downloadPath$subPathPatten";
+    var tags = extractTags(subPathPatten);
+    print(illust.tags);
+    for(var tag in tags) {
+      print(tag);
+      if (illust.tags.where((e) => e.name == tag || e.translatedName == tag).isNotEmpty) {
+        subPathPatten = subPathPatten.replaceAll("\${tag($tag)}", tag);
+      }
+    }
+    return _cleanFilePath("$downloadPath$subPathPatten");
+  }
+
+  static String _cleanFilePath(String filePath) {
+    const invalidChars = ['*', '?', '"', '<', '>', '|'];
+
+    String cleanedPath =
+        filePath.replaceAll(RegExp('[${invalidChars.join(' ')}]'), '');
+
+    cleanedPath = cleanedPath.replaceAll(RegExp(r'[/\\]+'), '/');
+
+    return cleanedPath;
   }
 
   void retry() {

lib/pages/settings_page.dart

@@ -282,8 +282,6 @@ class _SetDownloadSubPathPage extends StatefulWidget {
 class __SetDownloadSubPathPageState extends State<_SetDownloadSubPathPage> {
   final controller =
       TextEditingController(text: appdata.settings["downloadSubPath"]);
-  final controller2 =
-      TextEditingController(text: appdata.settings["tagsWeight"]);
 
   @override
   Widget build(BuildContext context) {
@@ -297,26 +295,6 @@ class __SetDownloadSubPathPageState extends State<_SetDownloadSubPathPage> {
           TextBox(
             controller: controller,
           ).paddingHorizontal(16),
-          Text("Weights of the tags".tl)
-              .padding(const EdgeInsets.symmetric(vertical: 8, horizontal: 16)),
-          TextBox(
-            controller: controller2,
-          ).paddingHorizontal(16),
-          const SizedBox(
-            height: 8,
-          ),
-          ListTile(
-            title: Text("Use translated tag name".tl),
-            trailing: ToggleSwitch(
-              checked: appdata.settings["useTranslatedNameForDownload"],
-              onChanged: (value) {
-                setState(() {
-                  appdata.settings["useTranslatedNameForDownload"] = value;
-                });
-                appdata.writeSettings();
-              },
-            ),
-          ),
           const SizedBox(
             height: 8,
           ),
@@ -326,7 +304,6 @@ class __SetDownloadSubPathPageState extends State<_SetDownloadSubPathPage> {
               var text = controller.text;
               if (check(text)) {
                 appdata.settings["downloadSubPath"] = text;
-                appdata.settings["tagsWeight"] = controller2.text;
                 appdata.writeData();
                 context.pop();
               } else {
@@ -360,15 +337,9 @@ ${"Some keywords will be replaced by the following rule:".tl}
   \${id} -> ${"Artwork ID".tl}
   \${index} -> ${"Index of the image in the artwork".tl}
   \${ext} -> ${"File extension".tl}
+  \${AI} -> ${"Replace with 'AI' if the work was generated by AI, otherwise replace with blank".tl}
+  \${tag{*}} -> ${"Replace with * if the work have tag *, otherwise replace with blank.".tl}
 
-${"Tags: Tags will be sorted by the \"Weights of tags\" setting and replaced by the following rule:".tl}
-${"The final text will be affected by the \"Use translated tag name\" setting.".tl}
-  \${tag0} -> ${"The first tag of the artwork".tl}
-  \${tag1} -> ${"The second tag of the artwork".tl}
-  ...
-
-${"Weights of the tags".tl}:
-${"Filled with tags. The tags should be separated by a space. The tag in front has higher weight.".tl}
-${"It is required to use the original name instead of the translated name.".tl}
+${"Multiple path separators will be automatically replaced with a single".tl}
 """;
 }

lib/utils/io.dart

@@ -29,6 +29,9 @@ extension FSExt on FileSystemEntity {
 extension DirectoryExt on Directory {
   bool havePermission() {
     if(!existsSync()) return false;
+    if(App.isMacOS) {
+      return true;
+    }
     try {
       listSync();
       return true;