class ArtImage {
    constructor(url) {
        this.url = url; //原图路径
    }

    get compressionUrl() {
        return formatCompression(this.url);
    }

    get previewUrl() {
        return formatPreview(this.url);
    }
}

function formatCompression(url) {
    if (!url) return;
    if (url.indexOf('blob:') !== -1) return url; //本地文件流直接放行
    if (url.indexOf('/compression/') !== -1) {
        url = url.replace('/compression/', '/');
    }
    if (url.indexOf('/preview/') !== -1) {
        url = url.replace('/preview/', '/');
    }
    let imgSrc = url;
    let splitList = imgSrc.split('/');
    let fileName = splitList[splitList.length - 1];
    fileName = fileName.split('.')[0] + '.jpg'; //图片服务压缩过的图片统一都是jpg格式，因此这里需要更好图片后缀
    splitList.pop(); //移除掉文件名部分
    return splitList.join('/') + '/compression/' + fileName;
}

//转化预览图路径
function formatPreview(url) {
    if (!url) return;
    if (url.indexOf('blob:') !== -1) return url; //本地文件流直接放行
    if (url.indexOf('/preview/') !== -1) return url;
    if (url.indexOf('/compression/') !== -1) {
        url = url.replace('/compression/', '/');
    }
    let imgSrc = url;
    let splitList = imgSrc.split('/');
    let fileName = splitList[splitList.length - 1];
    fileName = fileName.split('.')[0] + '.jpg'; //图片服务压缩过的图片统一都是jpg格式，因此这里需要更好图片后缀
    splitList.pop(); //移除掉文件名部分

    return splitList.join('/') + '/preview/' + fileName;
}

export default ArtImage;