Google Kalender in Ionic

Question

Ich versuche, eine mobile App mit Ionic zu erstellen und für diese App müssen wir den Google-Kalender verwenden. Ziel ist es, eine App zu erstellen, in der sich bestimmte Personen einige Veranstaltungen abonnieren können. Diese Ereignisse werden nun im Google-Kalender erstellt und wir möchten uns entweder in unserem Google Kalender in der App anmelden, die nur bestimmte Ereignisse anzeigt.

Ich habe schon seit Ewigkeiten gesucht, aber ich kann nicht herausfinden, wie Sie mit Google Kalender in Ionic verbinden.

Bitte helfen Sie mir, loszulegen.

Answer 1

Ich konnte es selbst lösen, aber nicht direkt in Ionic.

Ich kontaktierte meinen node.js Backend und in node.js ist möglich, die Google api zu kontaktieren ...

let eventCategories = require('./event.model'); 

let fs = require('fs'); 
let readline = require('readline'); 
let google = require('googleapis'); 
let googleAuth = require('google-auth-library'); 

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


module.exports = { 
    getEventCategories, 
    getEvents 
}; 

function getEventCategories(){ 
    return eventCategories.find({}); 
} 

function getEvents(calendarId) { 
    return loadClientSecrets() 
    .then(res => authorize(JSON.parse(res)) 
        .then(response => listEvents(response, calendarId))) 

} 

function loadClientSecrets(){ 
    return new Promise(function (fulfill, reject){ 
    fs.readFile('client_secret.json', function processClientSecrets(err, content){ 
     if (err){ 
     console.log('Error loading client secret file: '+ err); 
     reject(err); 
     } 
     else fulfill(content); 
    }) 
    }) 
} 



/** 
* Create an OAuth2 client with the given credentials, and then execute the 
* given callback function. 
*/ 
function authorize(credentials) { 
    return new Promise(function (fulfill, reject){ 
    let clientSecret = credentials.installed.client_secret; 
    let clientId = credentials.installed.client_id; 
    let redirectUrl = credentials.installed.redirect_uris[0]; 
    let auth = new googleAuth(); 
    let oauth2Client = new auth.OAuth2(clientId, clientSecret, redirectUrl); 

    // Check if we have previously stored a token. 
    fs.readFile(TOKEN_PATH, function(err, token) { 
     if (err) { 
     fulfill(getNewToken(oauth2Client)); 
     } else { 
     oauth2Client.credentials = JSON.parse(token); 
     fulfill(oauth2Client); 
     } 
    }); 
    }) 
} 

/** 
* Get and store new token after prompting for user authorization, and then 
* execute the given callback with the authorized OAuth2 client. 
*/ 
function getNewToken(oauth2Client) { 
    new Promise (function (fulfill, reject){ 
    let authUrl = oauth2Client.generateAuthUrl({ 
     access_type: 'offline', 
     scope: SCOPES 
    }); 
    console.log('Authorize this app by visiting this url: ', authUrl); 
    let 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); 
      reject(err); 
     } 
     oauth2Client.credentials = token; 
     storeToken(token); 
     fulfill(oauth2Client); 
     }); 
    }); 
    }) 
} 

/** 
* Store token to disk be used in later program executions. 
*/ 
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. 
*/ 
function listEvents(auth, calendarId) { 
    return new Promise(function (fulfill, reject){ 
    var calendar = google.calendar('v3'); 
    calendar.events.list({ 
     auth: auth, 
     calendarId: calendarId, 
     timeMin: (new Date()).toISOString(), 
     maxResults: 10, 
     singleEvents: true, 
     orderBy: 'startTime' 
    }, function(err, response) { 
     if (err) { 
     console.log('The API returned an error: ' + err); 
     reject(err); 
     } 
     let events = response.items; 
     if (events.length == 0) { 
     console.log('No upcoming events found.'); 
     } else { 
     console.log('Upcoming 10 events:'); 
     for (let i = 0; i < events.length; i++) { 
      let event = events[i]; 
      let start = event.start.dateTime || event.start.date; 
      console.log('%s - %s', start, event.summary); 
     } 
     fulfill(events) 
     } 
    }); 
    }) 
}