tweaks (#1816)

* opt: getFileName

* opt: audio-pitch-correction

* opt: spring dialog

* opt: account dialog

* update [skip ci]

---------

Co-authored-by: dom <githubaccount56556@proton.me>

lib/utils/utils.dart

@@ -162,15 +162,28 @@ abstract final class Utils {
     return randomBase64.substring(0, randomBase64.length - 2);
   }
 
-  static int _getExt(String uri) {
-    final i = uri.indexOf('?');
-    return i == -1 ? uri.length : i;
-  }
-
   static String getFileName(String uri, {bool fileExt = true}) {
-    final i0 = uri.lastIndexOf('/') + 1;
-    final i1 = fileExt ? _getExt(uri) : uri.lastIndexOf('.');
-    return uri.substring(i0, i1);
+    int slash = -1;
+    int dot = -1;
+    int qMark = uri.length;
+
+    loop:
+    for (int index = uri.length - 1; index >= 0; index--) {
+      switch (uri.codeUnitAt(index)) {
+        case 0x2F: // `/`
+          slash = index;
+          break loop;
+        case 0x2E: // `.`
+          if (dot == -1) dot = index;
+          break;
+        case 0x3F: // `?`
+          qMark = index;
+          if (dot > qMark) dot = -1;
+          break;
+      }
+    }
+    RangeError.checkNotNegative(slash, '/');
+    return uri.substring(slash + 1, (fileExt || dot == -1) ? qMark : dot);
   }
 
   /// When calling this from a `catch` block consider annotating the method