bandcamp-fetch/dist/mjs/lib/image/ImageParser.js

Scrape Bandcamp content

import { load as cheerioLoad } from 'cheerio';
import { ParseError } from '../utils/Parse.js';
export default class ImageParser {
    static parseImageConstants(html) {
        const $ = cheerioLoad(html);
        const scripts = $('script').map((_, el) => $(el).html()).toArray();
        let template = null;
        for (const script of scripts) {
            const templateRegex = /var TemplGlobals = (.+);/gm;
            const templateMatch = templateRegex.exec(script);
            if (templateMatch && templateMatch[1]) {
                try {
                    template = JSON.parse(templateMatch[1]);
                }
                catch (error) {
                    template = null;
                }
                if (template && typeof template === 'object') {
                    break;
                }
            }
        }
        try {
            if (!template) {
                throw Error('TemplGlobals object not found or has invalid type');
            }
            const formats = template.image_formats;
            if (!formats || !Array.isArray(formats)) {
                throw Error('TemplGlobals.image_formats not found or has invalid type');
            }
            const siteRoot = template.image_siteroot_https;
            if (!siteRoot || typeof siteRoot !== 'string') {
                throw Error('TemplGlobals.image_siteroot_https not found or has invalid type');
            }
            return {
                baseUrl: siteRoot,
                formats: formats.map((format) => ({
                    id: format.id,
                    name: format.name,
                    width: format.width,
                    height: format.height,
                    fileFormat: format.file_format
                }))
            };
        }
        catch (error) {
            const msg = error instanceof Error ? error.message : String(error);
            throw new ParseError(`Failed to parse image constants: ${msg}`, template);
        }
    }
}
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