bandcamp-fetch/dist/mjs/lib/fan/FanInfoParser.js

Scrape Bandcamp content

import { load as cheerioLoad } from 'cheerio';
import { decode } from 'html-entities';
import { ParseError } from '../utils/Parse.js';
import ObjectHelper from '../utils/ObjectHelper.js';
export default class FanInfoParser {
    static parseInfo(html, opts) {
        const $ = cheerioLoad(html);
        const blob = decode($('#pagedata[data-blob]').attr('data-blob'));
        let parsed;
        try {
            parsed = JSON.parse(blob);
        }
        catch (error) {
            throw new ParseError('Failed to parse fan info: JSON error in data-blob.', html, error);
        }
        const fanData = parsed.fan_data || {};
        const fanId = fanData.fan_id;
        if (!fanId || !fanData.name || !fanData.username) {
            throw new ParseError('Failed to parse fan info: invalid data.', html);
        }
        const result = {
            type: 'fan',
            name: fanData.name || null,
            username: fanData.username || null,
            url: fanData.trackpipe_url,
            description: fanData.bio || null,
            location: fanData.location || null,
            websiteUrl: fanData.website_url || null,
            imageUrl: '',
            followingGenresCount: fanData.following_genres_count || 0,
            followingArtistsAndLabelsCount: fanData.following_bands_count || 0,
            collectionItemCount: parsed.collection_data?.item_count || 0,
            wishlistItemCount: parsed.wishlist_data?.item_count || 0
        };
        if (fanData.photo && fanData.photo.image_id && opts.imageFormat?.id) {
            result.imageUrl = `${opts.imageBaseUrl}/img/${fanData.photo.image_id}_${opts.imageFormat.id}.jpg`;
        }
        return result;
    }
    static parseLoggedInFanUsername(html) {
        const $ = cheerioLoad(html);
        const blob = decode($('#HomepageApp[data-blob]').attr('data-blob'));
        let parsed;
        try {
            parsed = JSON.parse(blob);
        }
        catch (error) {
            throw new ParseError('Failed to parse logged-in fan username: JSON error in data-blob.', html, error);
        }
        const username = ObjectHelper.getProperty(parsed, 'pageContext.identity.fanUsername');
        if (!username || typeof username !== 'string') {
            let reason;
            if (username === null) {
                reason = 'check if valid cookie is set';
            }
            else {
                reason = 'invalid data';
            }
            throw new ParseError(`Failed to parse logged-in fan username: ${reason}.`, parsed);
        }
        return username;
    }
}
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