getImage static method

String getImage(int width, { int? height, int? id, String? seed, bool isGray = false, int? blur, int? random, bool isJpg = false, bool isWebp = false, })

获取模拟图片.

Implementation

static String getImage(
  int width, {
  int? height, //图片高度
  int? id, //具体图片 id,参考 https://picsum.photos/images
  String? seed, //根据 seed 获取固定静态图片
  bool isGray = false, //灰色图片
  int? blur, //毛玻璃效果,数字越大越模糊
  int? random, // 获取相同大小的随机图片,避免缓存
  bool isJpg = false, // 是否为 jpg 后缀
  bool isWebp = false, // 当 isJpg 为 false,用于确定是否 webp 后缀
}) {
  const base = 'https://picsum.photos';
  var url = '$base/$width';

  if (seed != null) {
    url = '$base/seed/$seed/$width';
  }
  if (id != null) {
    url = '$base/id/$id/$width';
  }

  if (height != null) {
    url += '/$height';
  }
  if (isJpg) {
    url += '.jpg';
  } else {
    if (isWebp) {
      url += '.webp';
    }
  }
  if (isGray) {
    url += '?grayscale';
  }
  if (blur != null) {
    if (url.contains('?')) {
      url += '&blur=$blur';
    } else {
      url += '?blur=$blur';
    }
  }
  if (random != null) {
    if (url.contains('?')) {
      url += '&random=$random';
    } else {
      url += '?random=$random';
    }
  }

  return url;
}