index.js
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'use strict';
const google = require('googleapis');
const googleAuth = require('google-auth-library');
const calendar = google.calendar('v3');
const fs = require('fs');
const path = require('path');
const yamlConfig = require('node-yaml-config');
const config = yamlConfig.load(path.join(__dirname, '/../../config/config.yml'));
const CALENDAR_ID = config.calendarID
const SCOPES = ['https://www.googleapis.com/auth/calendar'];
const TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE) + '/.credentials/';
const TOKEN_PATH = TOKEN_DIR + 'calendar-nodejs-quickstart.json';
function hasTimezone(timezone) {
if (timezone) {
return timezone
} else {
return 'Asia/Bangkok'
}
}
function getNewToken(oauth2Client, callback) {
var authUrl = oauth2Client.generateAuthUrl({
access_type: 'offline',
scope: SCOPES
});
// console.log('Authorize this app by visiting this url: ', authUrl);
return authUrl;
}
function setNewToken(code) {
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);
})
}
function storeToken(token) {
try {
fs.mkdirSync(TOKEN_DIR);
} catch (err) {
if (err.code != 'EEXIST') {
throw err;
}
}
fs.writeFile(TOKEN_PATH, JSON.stringify(token));
console.log('Token stored to ' + TOKEN_PATH);
}
module.exports = {
authorize: (callback) => {
fs.readFile('client_secret.json', (err, content) => {
if (err) return callback(err);
let credentials = JSON.parse(content);
var clientSecret = credentials.installed.client_secret;
var clientId = credentials.installed.client_id;
var redirectUrl = credentials.installed.redirect_uris[0];
var auth = new googleAuth();
var oauth2Client = new auth.OAuth2(clientId, clientSecret, redirectUrl);
fs.readFile(TOKEN_PATH, (err, token) => {
if (err) {
return callback(null, null, getNewToken(oauth2Client, callback));
} else {
oauth2Client.credentials = JSON.parse(token);
return callback(null, oauth2Client);
}
});
});
},
setNewToken: (code, callback) => {
fs.readFile('client_secret.json', (err, content) => {
if (err) return callback(err);
let credentials = JSON.parse(content);
var clientSecret = credentials.installed.client_secret;
var clientId = credentials.installed.client_id;
var redirectUrl = credentials.installed.redirect_uris[0];
var auth = new googleAuth();
var oauth2Client = new auth.OAuth2(clientId, clientSecret, redirectUrl);
fs.readFile(TOKEN_PATH, (err, token) => {
if (err) {
oauth2Client.getToken(code, function (err, token) {
if (err) {
console.log('Error while trying to retrieve access token', err);
return;
} else {
oauth2Client.credentials = token;
storeToken(token);
return callback(null, oauth2Client);
}
})
} else {
oauth2Client.credentials = JSON.parse(token);
return callback(null, oauth2Client);
}
});
});
},
listEvents: (auth, callback) => {
calendar.events.list({
auth: auth,
calendarId: CALENDAR_ID || 'primary',
timeMin: (new Date()).toISOString(),
maxResults: 50,
singleEvents: true,
orderBy: 'startTime'
}, (err, response) => {
if (err) return callback(err);
return callback(null, response);
});
},
createEvent: (options, callback) => {
calendar.events.insert({
auth: options.auth,
calendarId: CALENDAR_ID || 'primary',
resource: options
}, (err, response) => {
if (err) return callback(err);
return callback(null, response);
});
},
deleteEvent: (options, callback) => {
calendar.events.delete({
auth: options.auth,
calendarId: CALENDAR_ID || 'primary',
eventId: options.eventId
}, (err, response) => {
if (err) return callback(err);
return callback(null, response);
});
},
eventBuilder: (payload) => {
var buildPayload = {}
try {
buildPayload.summary = payload.summary
buildPayload.description = payload.description
buildPayload.start = {
dateTime: payload.startDate,
timezone: hasTimezone(payload.startTimeZone)
}
buildPayload.end = {
dateTime: payload.endDate,
timeZone: hasTimezone(payload.endTimeZone)
}
if (payload.email) {
buildPayload.attendees = [{ email: payload.email }]
}
if (payload.reminders) {
buildPayload.reminders = {
useDefault: false,
overrides: [
{
method: 'email',
minutes: 24 * 60
}
]
}
}
if (payload.extendedProperties) {
buildPayload.extendedProperties = payload.extendedProperties
}
} catch (error) {
console.error(error.message)
} finally {
return buildPayload
}
}
}