silvrgit/lib/events.js

const http = require('http');
const request = require('request');
const cheerio = require('cheerio');
const logger = require('log4js').getLogger('Events');

const eventTimer = 0;
const eventCache = {
  'last': 0,
  'data': {},
  'expire': ((60 * 1000) * 60) * 12,
  'cinema': {}
};
// 'cwr':{data: {}, last:0};

const cinemas = [{ 'id': 'cwr', 'url': 'https://film.list.co.uk/cinema/14982-cineworld-renfrew-street/' },
  { 'id': 'gsc', 'url': 'https://film.list.co.uk/cinema/13590-cineworld-glasgow-science-centre/' },
  { 'id': 'pho', 'url': 'https://film.list.co.uk/cinema/12500-showcase-cinema-paisley/' },
  { 'id':'evr', 'url':'https://film.list.co.uk/cinema/111845-everyman-glasgow/' }];

module.exports = {
  'getEvents': function (req, res) {
    logger.debug('Getting events...');
    const j = [], url = 'https://www.list.co.uk/events/days-out/when:this%20weekend/location:Dumbarton(55.9460,-4.5556)/distance:20/';

    const now = new Date();

    if ((now - eventCache.last) > eventCache.expire) 
      request(url, function (err, resp, body) {
        if (err)
          throw err;
        $ = cheerio.load(body);
        // logger.debug($);
        // TODO: scraping goes here!

        $('.resultsRow').each(function (div) {
          const item = {};
          const eventSummary = $(this).find('.eventSummary').first();
          const byDate = $(this).find('.byDate').first();

          const title = eventSummary.find('.head').first();
          const description = eventSummary.find('P').first();
          const link = ` https://www.list.co.uk${ eventSummary.find('A').first().attr('href')}`;

          const price = byDate.find('.price').first();
          const dt = byDate.find('.dtstart').first().attr('title');

          item.title = title.text();
          item.description = description.text();
          item.link = link;
          item.price = price.text();
          item.date = dt;

          j.push(item);
        });

        eventCache.last = now;
        eventCache.data = j;

        res.render('pages/events', eventCache);
      }, function(error, response, body) {
        if(response.statusCode !== 200) {
          logger.error(response.statusCode);
          logger.error(body);
        }
      });
    else {
      logger.info('Using event cache...');

      res.render('pages/events', eventCache);
    }
  },
  'doGetCinema': function (id) {
    const cinemaID = cinemas[id].id;
    const url = cinemas[id].url;
    const thisCinema = eventCache[cinemaID] || { 'data': {}, 'last': 0 };
    logger.debug(cinemaID);
    logger.debug(url);
    const j = [];

    const now = new Date();

    if ((now - thisCinema.last) > eventCache.expire) 
      request(url, function (err, resp, body) {
        logger.debug('Working');
        if (err) 
          throw err;
        
        const $ = cheerio.load(body);

        $('.byEvent').each(function (div) {
          const item = {};
          const title = $(this).find('H4').first();
          const eventSummary = $(this).find('.eventSummary').first();

          const description = eventSummary.find('P').first();
          const link = ` https://www.list.co.uk${ eventSummary.find('A').first().attr('href')}`;

          item.title = title.text();
          item.description = description.text();
          item.link = link;

          j.push(item);
        });

        thisCinema.last = now;
        thisCinema.data = j;

        eventCache[cinemaID] = thisCinema;
        logger.debug('returning');

        return thisCinema;
      }, (error, response, body) => {
        if(response.statusCode !== 200) {
          console.error(response.statusCode);
          console.error(body);
        }
      });
    else {
      logger.debug('Using event cache...');
      
      return thisCinema;
    }
  },
  'getCinema': function (req, res) {
    const id = parseInt(req.params.id);
    logger.debug(`Getting cinema: ${ id}`);

    const output = module.exports.doGetCinema(id);
    res.render('pages/cinema', output);
  },
  'preLoad': function () {
    let output = module.exports.doGetCinema(0);
    output = module.exports.doGetCinema(1);
    output = module.exports.doGetCinema(2);
    output = module.exports.doGetCinema(3);

    setTimeout(function () {
      module.exports.preLoad();
    }, eventCache.expire);
  }
};

setTimeout(function () {
  logger.debug('Pre loading cinemas...');
  module.exports.preLoad();
}, 10000);