Refactors

lib/annotation_manager.dart

@@ -0,0 +1,44 @@
+import 'package:dartboard_resume/widgets/footnote.dart';
+import 'package:pdf/widgets.dart';
+
+class AnnotationManager {
+  // Factory constructor to return the single instance
+  factory AnnotationManager() {
+    return _instance;
+  }
+
+  // Private constructor
+  AnnotationManager._privateConstructor();
+
+  // Static field to hold the single instance of the class
+  static final AnnotationManager _instance = AnnotationManager._privateConstructor();
+
+  // Field to hold the number
+  int _numUrls = 0;
+  List<Widget> _urlWidgets = [];
+  TextStyle? _style;
+
+  // ignore: avoid_setters_without_getters
+  set style(TextStyle style) => _style = style;
+
+  int add({required String url}) {
+    _numUrls += 1;
+    if (_style == null) {
+      throw Exception('Must provide text style for urls');
+    }
+    _urlWidgets.add(Footnote(number: _numUrls, style: _style!, url: url));
+    return _numUrls;
+  }
+
+  List<Widget> get footnotes {
+    final widgets = [..._urlWidgets];
+    reset();
+    return widgets;
+  }
+
+  // Method to reset the number
+  void reset() {
+    _numUrls = 0;
+    _urlWidgets = [];
+  }
+}