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- 'use strict';
- var cheerio = require('cheerio');
- var episode = require('./episode');
- var persistent = '.crpersistent';
- var fs = require('fs');
- var request = require('./request');
- var path = require('path');
- var url = require('url');
- /**
- * Streams the series to disk.
- * @param {Object} config
- * @param {string} address
- * @param {function(Error)} done
- */
- module.exports = function(config, address, done) {
- var persistentPath = path.join(config.output || process.cwd(), persistent);
- fs.readFile(persistentPath, 'utf8', function(err, contents) {
- var cache = config.cache ? {} : JSON.parse(contents || '{}');
- _page(config, address, function(err, page) {
- if (err) return done(err);
- var i = 0;
- (function next() {
- if (i >= page.episodes.length) return done();
- _download(cache, config, address, page.episodes[i], function(err) {
- if (err) return done(err);
- var newCache = JSON.stringify(cache, null, ' ');
- fs.writeFile(persistentPath, newCache, function(err) {
- if (err) return done(err);
- i += 1;
- next();
- });
- });
- })();
- });
- });
- };
- /**
- * Downloads the episode.
- * @private
- * @param {Object.<string, string>} cache
- * @param {Object} config
- * @param {string} baseAddress
- * @param {Object} item
- * @param {function(Error)} done
- */
- function _download(cache, config, baseAddress, item, done) {
- if (!_filter(config, item)) return done();
- var address = url.resolve(baseAddress, item.address);
- if (cache[address]) return done();
- episode(config, address, function(err) {
- if (err) return done(err);
- cache[address] = Date.now();
- done();
- });
- }
- /**
- * Filters the item based on the configuration.
- * @param {Object} config
- * @param {Object} item
- * @returns {boolean}
- */
- function _filter(config, item) {
- // Filter on chapter.
- var episodeFilter = parseInt(config.episode, 10);
- if (episodeFilter > 0 && item.episode <= episodeFilter) return false;
- if (episodeFilter < 0 && item.episode >= -episodeFilter) return false;
- // Filter on volume.
- var volumeFilter = parseInt(config.volume, 10);
- if (volumeFilter > 0 && item.volume <= volumeFilter) return false;
- if (volumeFilter < 0 && item.volume >= -volumeFilter) return false;
- return true;
- }
- /**
- * Requests the page and scrapes the episodes and series.
- * @private
- * @param {Object} config
- * @param {string} address
- * @param {function(Error, Object=)} done
- */
- function _page(config, address, done) {
- request.get(config, address, function(err, res, body) {
- if (err) return done(err);
- var $ = cheerio.load(body);
- var title = $('span[itemprop=name]').text();
- if (!title) return done(new Error('Invalid page.'));
- var episodes = [];
- $('.episode').each(function(i, el) {
- if ($(el).children('img[src*=coming_soon]').length) return;
- var volume = /([0-9]+)\s*$/.exec($(el).closest('ul').prev('a').text());
- var regexp = /Episode\s+([0-9]+)\s*$/i;
- var episode = regexp.exec($(el).children('.series-title').text());
- var address = $(el).attr('href');
- if (!address || !episode) return;
- episodes.push({
- address: address,
- episode: parseInt(episode[0], 10),
- volume: volume ? parseInt(volume[0], 10) : 1
- });
- });
- done(undefined, {episodes: episodes.reverse(), series: title});
- });
- }
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