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const fs = require('fs');
const readline = require('readline');
const {
google
} = require('googleapis');
const OAuth2 = google.auth.OAuth2;
// If modifying these scopes, delete your previously saved credentials
// at ~/.credentials/youtube-nodejs-quickstart.json
let SCOPES = ['https://www.googleapis.com/auth/youtube.readonly'];
let TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH ||
process.env.USERPROFILE) + '/.credentials/';
let TOKEN_PATH = TOKEN_DIR + 'youtube-nodejs-quickstart.json';
module.exports.readApiKey = (callback) => {
fs.readFile('client_secret.json', function processClientSecrets(err, content) {
if (err) {
console.log('Error loading client secret file: ' + err);
return;
}
callback(content);
});
};
module.exports.authorizedGetChannel = (apiKey) => {
//this didnt get called
// Authorize a client with the loaded credentials, then call the YouTube API.
authorize(JSON.parse(apiKey), getChannel);
};
module.exports.authorizedGetVideos = (apiKey, userInput, callBack) => {
authorize(JSON.parse(apiKey), getVideos, {
userInput: userInput,
callBack: callBack
});
};
module.exports.authorizedGetVideoDetails = (apiKey, videoIds, callBack) => {
authorize(JSON.parse(apiKey), getVideoDetails, {
videoIds: videoIds,
callBack: callBack
});
};
/**
* Create an OAuth2 client with the given credentials, and then execute the
* given callback function.
*
* @param {Object} credentials The authorization client credentials.
* @param {function} callback The callback to call with the authorized client.
*/
function authorize(credentials, callback, args = {}) {
let clientSecret = credentials.installed.client_secret;
let clientId = credentials.installed.client_id;
let redirectUrl = credentials.installed.redirect_uris[0];
let oauth2Client = new OAuth2(clientId, clientSecret, redirectUrl);
// Check if we have previously stored a token.
fs.readFile(TOKEN_PATH, function (err, token) {
if (err) {
getNewToken(oauth2Client, callback);
} else {
oauth2Client.credentials = JSON.parse(token);
callback(oauth2Client, args);
}
});
}
/**
* Get and store new token after prompting for user authorization, and then
* execute the given callback with the authorized OAuth2 client.
*
* @param {google.auth.OAuth2} oauth2Client The OAuth2 client to get token for.
* @param {getEventsCallback} callback The callback to call with the authorized
* client.
*/
function getNewToken(oauth2Client, callback) {
var authUrl = oauth2Client.generateAuthUrl({
access_type: 'offline',
scope: SCOPES
});
console.log('Authorize this app by visiting this url: ', authUrl);
var rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.question('Enter the code from that page here: ', function (code) {
rl.close();
oauth2Client.getToken(code, function (err, token) {
if (err) {
console.log('Error while trying to retrieve access token', err);
return;
}
oauth2Client.credentials = token;
storeToken(token);
callback(oauth2Client);
});
});
}
/**
* Store token to disk be used in later program executions.
*
* @param {Object} token The token to store to disk.
*/
function storeToken(token) {
try {
fs.mkdirSync(TOKEN_DIR);
} catch (err) {
if (err.code != 'EEXIST') {
throw err;
}
}
fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
if (err) throw err;
console.log('Token stored to ' + TOKEN_PATH);
});
console.log('Token stored to ' + TOKEN_PATH);
}
/**
* Lists the names and IDs of up to 10 files.
*
* @param {google.auth.OAuth2} auth An authorized OAuth2 client.
*/
function getChannel(auth) {
var service = google.youtube('v3');
service.channels.list({
auth: auth,
part: 'snippet,contentDetails,statistics',
forUsername: 'GoogleDevelopers'
}, function (err, response) {
if (err) {
console.log('The API returned an error: ' + err);
return;
}
var channels = response.data.items;
if (channels.length == 0) {
console.log('No channel found.');
} else {
console.log('This channel\'s ID is %s. Its title is \'%s\', and ' +
'it has %s views.',
channels[0].id,
channels[0].snippet.title,
channels[0].statistics.viewCount);
}
});
}
function getVideos(auth, args) {
let service = google.youtube('v3');
service.search.list({
auth: auth,
part: 'id, snippet',
type: 'video',
q: args.userInput,
maxResults: 10
}, function (err, response) {
if (err) {
console.log('The API returned an error: ' + err);
return;
}
let videos = response.data.items;
args.callBack(videos);
});
}
function getVideoDetails(auth, args) {
if (args.videoIds === undefined) {
return;
}
let service = google.youtube('v3');
service.videos.list({
auth: auth,
part: 'contentDetails, statistics',
id: args.videoIds
}, function (err, response) {
if (err) {
console.log('The API returned an error from details: ' + err);
return;
}
let videoDetails = response.data.items;
args.callBack(videoDetails);
});
}
|
