Youtubeのチャンネル/ユーザーに新規動画が追加されたら自分のプレイリストに追加するやつ

checkUpdateChannel.js

/*
 * Check Youtube channel.
 * When upload a video to target channel, add to my playlist. 
 *
 * Copyright © 2017 gc373  
 * This work is free. You can redistribute it and/or modify it under the  
 * terms of the Do What The Fuck You Want To Public License, Version 2,  
 * as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.  
 * http://www.wtfpl.net/
 */

const Youtube = require("youtube-api");
/*
const REFRESH_TOKEN = process.env.REFRESH_TOKEN;
const CLIENT_ID = process.env.CLIENT_ID;
const CLIENT_SECRET = process.env.CLIENT_SECRET;
const REDIRECT_URI = "urn:ietf:wg:oauth:2.0:oob";
const MY_PLAYLISTID = process.env.MY_PLAYLISTID;
const TARGET_PLAYLISTID = process.env.TARGET_PLAYLISTID;
 */
const REFRESH_TOKEN = "";
const CLIENT_ID = "";
const CLIENT_SECRET = "";
const REDIRECT_URI = "";
const MY_PLAYLISTID = "";
const TARGET_PLAYLISTID = "";

let last_id;
let nextpage_token;
let token_timestamp;
init();

function init() {
  nextpage_token = null;
  chkToken();
  setTimeout(init, 1000 * 60);
}

function chkToken() {
  if (!token_timestamp || !nextpage_token && (new Date() - token_timestamp) / (1000 * 60 * 60) > 1) {
    Youtube.authenticate({
      type: "oauth",
      refresh_token: REFRESH_TOKEN,
      client_id: CLIENT_ID,
      client_secret: CLIENT_SECRET,
      redirect_uri: REDIRECT_URI
    }, () => {
      token_timestamp = new Date();
      console.log("token is now refresh", token_timestamp.toLocaleString());
    });
  }

  if (!last_id) {
    getLastId();
  } else {
    getTargetPlaylist();
  }
}

function getLastId(nextpage_token) {
  Youtube.playlistItems.list({
    "part": "snippet",
    "maxResults": 50,
    "playlistId": MY_PLAYLISTID,
    "pageToken": nextpage_token
  }, (err, data) => {
    if (err) {
      console.log(err)
    } else if (data.nextPageToken) {
      nextpage_token = data.nextPageToken;
      getLastId(nextpage_token);
    } else {
      last_id = data.items[data.items.length - 1].snippet.resourceId.videoId;
      getTargetPlaylist();
    }
  });
}

function getTargetPlaylist() {
  Youtube.playlistItems.list({
    "part": "snippet",
    "order": "date",
    "maxResults": 5,
    "playlistId": TARGET_PLAYLISTID
  }, (err, data) => {
    if (err) {
      console.log(err)
    } else if (last_id == data.items[0].snippet.resourceId.videoId) {
      console.log("no update [", (new Date()).toLocaleString(), "]\r\nID:", last_id);
    } else {
      let update_flg = false;
      let items = data.items.reverse();
      for (let i = 0, max = items.length; i < max; i++) {
        let item_id = items[i].snippet.resourceId.videoId;
        if (update_flg) {
          console.log("########### New Video! ###########\r\n# add to playlist -> ", item_id, "\r\n##################################");
          Youtube.playlistItems.insert({
            resource: {
              snippet: {
                "playlistId": MY_PLAYLISTID,
                "resourceId": {
                  "kind": "youtube#video",
                  "videoId": item_id
                }
              }
            },
            part: "snippet"
          }, (err, data) => {
            if (err) {
              console.log(err)
              return;
            } else {
              console.log(data)
            }
          });
          last_id = item_id;
        }

        if (item_id == last_id) {
          update_flg = true
        }
      }
    }
  })
}

20170615
Fix bug(expired token)