Working project

2024-10-09 18:40:11 -06:00
commit 670cb24095
70 changed files with 154073 additions and 0 deletions
@@ -0,0 +1,36 @@
+// ignore_for_file: public_member_api_docs
+
+enum Status { ok, error }
+
+class ShrinkRay {
+  static const shrinkLength = 6;
+  static const String shrinkChars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._';
+
+  static ({Status status, String content}) shrinkUrl(String urlStr) {
+    try {
+      final uri = Uri.parse(urlStr);
+      if (!uri.isScheme('HTTP') && !uri.isScheme('HTTPS') || uri.hasPort) {
+        throw const FormatException();
+      }
+
+      final hash = uri.hashCode;
+      return (status: Status.ok, content: _translate(hash));
+    } on FormatException {
+      return (status: Status.error, content: 'Invalid Uri');
+    } catch (err, st) {
+      print('Unknown error occurred: $err');
+      print(st);
+      return (status: Status.error, content: 'Unknown error occurred');
+    }
+  }
+
+  static String _translate(int hash, {String builtTranslation = ''}) {
+    if (builtTranslation.length == shrinkLength) return builtTranslation;
+    final index = hash % shrinkChars.length;
+    final translation = builtTranslation + shrinkChars.substring(index, index + 1);
+    final shiftedHash = hash << 1;
+    return _translate(shiftedHash, builtTranslation: translation);
+  }
+}
+
+Map<String, String> shrunkUrls = {};