index.js

#!/usr/bin/env node

var commander = require('commander');
var path = require('path');
var pkg = require(path.join(__dirname, 'package.json'));
var fs = require('fs');
var fussballDeMatchplanGrabber = require('fussball-de-matchplan-grabber');
var readline = require('readline');
var googleAuth = require('google-auth-library');
var google = require('googleapis');
var getTimezone = require('node-timezone').getTimezone
var moment = require('moment');
var yamlConfig = require('node-yaml-config');



commander.version(pkg.version)
	.option('-t, --team <team>', 'The team url.')
	.parse(process.argv);

var config = yamlConfig.load(__dirname + '/config.yml');
var team = commander.team || config.url.next_games + config.team.id;

fussballDeMatchplanGrabber.parseMatchplan(team, googleCalendarImport);

// If modifying these scopes, delete your previously saved credentials
// at ~/.fussball-de-matchplan-to-google-calendar/oauth.json
// var SCOPES = ['https://www.googleapis.com/auth/calendar.readonly'];
var SCOPES = ['https://www.googleapis.com/auth/calendar'];
var TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH ||
    process.env.USERPROFILE) + '/.fussball-de-matchplan-to-google-calendar/';
var TOKEN_PATH = TOKEN_DIR + 'oauth.json';

function googleCalendarImport(plan) {
    matchPlan = plan;
    // Load client secrets from a local file.
    fs.readFile('client_secret.json', function processClientSecrets(err, content) {
        if (err) {
            console.log('Error loading client secret file: ' + err);
            return;
        }
        // Authorize a client with the loaded credentials, then call the
        // Google Calendar API.
        authorize(JSON.parse(content), insertEvents);
    });
}

/**
 * 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) {
    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);

    // 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);
        }
    });
}

/**
 * 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));
    console.log('Token stored to ' + TOKEN_PATH);
}

/**
 * Lists the next 10 events on the user's primary calendar.
 *
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */
function listEvents(auth) {
    var calendar = google.calendar('v3');
    calendar.events.list({
        auth: auth,
        calendarId: config.calendar.id,
        timeMin: (new Date()).toISOString(),
        maxResults: 10,
        singleEvents: true,
        orderBy: 'startTime'
    }, function (err, response) {
        if (err) {
            console.log('The API returned an error: ' + err);
            return;
        }
        var events = response.items;
        if (events.length == 0) {
            console.log('No upcoming events found.');
        } else {
            console.log('Upcoming 10 events:');
            for (var i = 0; i < events.length; i++) {
                var event = events[i];
                var start = event.start.dateTime || event.start.date;
                console.log('%s - %s', start, event.summary);
            }
        }
    });
}

/**
 * Checks for already inserted event. If event already exists, it is updated.
 * If there is no event, then the event is inserted. If the more then one event, 
 * then the first one is updated and the other events will be deleted.
 * 
 * @param {google.auth.OAuth2} auth 
 * @param {Object} googleCalendarEvent 
 */
function checkForExistingEvent(auth, googleCalendarEvent) {
    var calendar = google.calendar('v3');
    calendar.events.list({
        auth: auth,
        calendarId: config.calendar.id,
        q: googleCalendarEvent.summary,
        singleEvents: true,
        orderBy: 'startTime',
        timeMin: googleCalendarEvent.start.dateTime.toISOString(),
        timeMax: googleCalendarEvent.end.dateTime.toISOString()
    }, function (err, response) {
        if (err) {
            console.log('The API returned an error: ' + err);
            return;
        }
        var events = response.items;
        if (events.length == 0) {
            console.log('No upcoming events found. Insert event: %s', googleCalendarEvent);
            insertEvent(auth, googleCalendarEvent);
        } else {
            console.log('Found events:');
            for (var i = 0; i < events.length; i++) {
                var event = events[i];
                var start = event.start.dateTime || event.start.date;
                console.log('%s - %s', start, event.summary);
                if (i === 0) {
                    updateEvent(auth, googleCalendarEvent, event.id);
                } else {
                    deleteEvent(auth, event.id);
                }

                
            }
        }
    });
}

/**
 * Inserts all events from the match plan to the Google calendar.
 * 
 * @param {google.auth.OAuth2} auth 
 */
function insertEvents(auth) {
    matchPlan.forEach(function (value, index, array) {
        var googleCalendarEvent = {
            'summary': 'Spiel: ' + value.getEncounter().toString(),
            'location': value.getLocation(),
            'description': value.getDescription() != null ? value.getDescription() + '\n\n' : '' + value.getURL() != null ? value.getURL() : '',
            'start': {
                'dateTime': new moment(value.getDate()).subtract(config.gathering.kickoff.before, 'h').toDate(),
                'timeZone': getTimezone(),
            },
            'end': {
                'dateTime': new moment(value.getDate()).add(config.gathering.kickoff.after, 'h').toDate(),
                'timeZone': getTimezone(),
            },
        };
        //insertEvent(auth, googleCalendarEvent);
        checkForExistingEvent(auth, googleCalendarEvent);
    });
}

/**
 * Inserts an event.
 *
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 * @param {Object} event A Google calendar event.
 */
function insertEvent(auth, event) {
    var calendar = google.calendar('v3');
    calendar.events.insert({
        auth: auth,
        calendarId: config.calendar.id,
        resource: event,
    }, function (err, event) {
        if (err) {
            console.log('There was an error contacting the Calendar service: ' + err);
            return;
        }
        console.log('Event %s created: %s', event.id, event.htmlLink);
    });
}

/**
 * Updates an event.
 *
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 * @param {Object} event A Google calendar event.
 * @param {String} id The id of the event in the Google calendar.
 */
function updateEvent(auth, event, id) {
    var calendar = google.calendar('v3');
    calendar.events.update({
        auth: auth,
        calendarId: config.calendar.id,
        eventId: id,
        resource: event
    }, function (err, event) {
        if (err) {
            console.log('There was an error contacting the Calendar service: ' + err);
            return;
        }
        console.log('Event %s updated: %s', event.id, event.htmlLink);
    });
}

/**
 * Deletes an event.
 *
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 * @param {Object} event A Google calendar event.
 * @param {String} id The id of the event in the Google calendar.
 */
function deleteEvent(auth, id) {
    var calendar = google.calendar('v3');
    calendar.events.delete({
        auth: auth,
        calendarId: config.calendar.id,
        eventId: id
    }, function (err) {
        if (err) {
            console.log('There was an error contacting the Calendar service: ' + err);
            return;
        }
        console.log('Event %s deleted.', id);
    });
}