gp_podcast_helper.js

"use strict";
const parsePodcast = require("node-podcast-parser");
const got = require("got");
const _ = require("lodash");
const URI = "https://gympiepresbyterian.org.au/sermons/index.xml";

function getPodcast() {
  return new Promise(function(resolve, reject) {
    (async () => {
      try {
        const response = await got(URI);
        parsePodcast(response.body, (err, data) => {
          if (err) {
            console.error("Parsing error", err);
            reject(err);
          }
          resolve(data);
        });
      } catch (error) {
        console.log("error:", error);
      }
    })();
  });
}

function GPPodcastHelper() {}

GPPodcastHelper.prototype.getEpisodeURL = function(episode) {
  return getPodcast()
    .then(function(pod) {
      if (_.isUndefined(episode)) {
        episode = 0;
      }
      var URL = pod.episodes[episode].enclosure.url.replace(
        "http://",
        "https://"
      );
      console.log("URL", URL);
      return URL;
    })
    .catch(function(error) {
      console.log("Failed", error);
      return error;
    });
};

GPPodcastHelper.prototype.getTitle = function(episode) {
  return getPodcast()
    .then(function(pod) {
      if (_.isUndefined(episode)) {
        episode = 0;
      }
      return pod.episodes[episode].title;
    })
    .catch(function(error) {
      console.log("Failed", error);
      return error;
    });
};

GPPodcastHelper.prototype.getDate = function(episode) {
  return getPodcast()
    .then(function(pod) {
      if (_.isUndefined(episode)) {
        episode = 0;
      }
      return pod.episodes[episode].published;
    })
    .catch(function(error) {
      console.log("Failed", error);
      return error;
    });
};

GPPodcastHelper.prototype.getEpisode = function(episode) {
  //This function will return an object with a pre-roll string and the URL of the episode
  return getPodcast()
    .then(function(pod) {
      if (_.isUndefined(episode)) {
        episode = 0;
      }
      var prompt =
        "This is a sermon from Gympie Presbyterian Church called " +
        pod.episodes[episode].title +
        " it was recorded on " +
        pod.episodes[episode].published.toDateString();
      //Alexa has to download the MP3 file over https
      var mp3URL = pod.episodes[episode].enclosure.url.replace(
        "http://",
        "https://"
      );
      var podcast = { preRoll: prompt, mp3URL: mp3URL };
      return podcast;
    })
    .catch(function(error) {
      console.log("Failed", error);
      return error;
    });
};

module.exports = GPPodcastHelper;