PiliPlus/lib/utils/extension.dart

import 'package:flutter/material.dart';

extension ImageExtension on num {
  int cacheSize(BuildContext context) {
    return (this * MediaQuery.of(context).devicePixelRatio).round();
  }
}

extension ScrollControllerExt on ScrollController {
  void animToTop() {
    if (!hasClients) return;
    animateTo(0,
        duration: const Duration(milliseconds: 500), curve: Curves.easeInOut);
  }
}

extension ListExt<T> on List<T>? {
  bool get isNullOrEmpty => this == null || this!.isEmpty;

  T? getOrNull(int index) {
    if (isNullOrEmpty) {
      return null;
    }
    return this![index];
  }

  bool eq(List<T>? other) {
    if (this == null) {
      return other == null;
    }
    if (other == null || this!.length != other.length) {
      return false;
    }
    for (int index = 0; index < this!.length; index += 1) {
      if (this![index] != other[index]) {
        return false;
      }
    }
    return true;
  }

  bool ne(List<T>? other) => !eq(other);
}

extension StringExt on String {
  String get http2https => replaceFirst(RegExp("^http://"), "https://");
}