marketplace-passport-example.js

// “InstallationURL” configured in marketplace
app.get('/marketplace/purchase', 
  // mark as a marketplace purchase
  (req, res, next) => {
    req.session.isMarketplacePurchase = true;
    next();
  },
  //send users through your normal GitHub Oauth
  passport.authenticate('github')
);

// oauth callback 
app.get('/auth/github/callback',
  passport.authenticate('github', { failureRedirect: '/login' }),
  handleMarketplacePurchase,
  (req, res) => {
    delete req.session.isMarketplacePurchase;
    // Successful authentication, redirect home.
    res.redirect('/');
  }
);

handleMarketplacePurchase: async (req, res, next) => {

  // a user might be the owner for more than one purchased subscription (multiple orgs, or org and personal)
  const purchases = await request.get('/user/marketplace_purchases');
  
   for(let purchase of purchases){
    let account = await Account.findOne({owner: purchase.account.login});
    
    account = account || new Account({
      owner: purchase.account.login,
      type: purchase.account.type
    });
    
    account.marketplacePlan = purchase.plan.name;

    // "subscriptionEndDate" is a consistent way between Stripe and Marketplace to toggle free vs paid features
    if (purchase.plan.price_model.toLowerCase() === 'free') {
      account.subscriptionEndDate = undefined;
    } else {
      account.subscriptionEndDate = new Date('2517');
    }

    // cancel an existing plan 
    if (account.stripeId) {
      await StripeHelper.deleteSubscriptionInStripe({ account });
    }

    await account.save();
  }
};

marketplace-webhook.coffee

app.post('/marketplace/receive’, (req, res, next) =>
  switch
    when 'canceled', 'cancelled'
      account.cancelAt = effective_date + 29 days
    when 'changed'
      account.marketplacePlan = marketplace_purchase.plan.name
      account.subscriptionEndDate = new Date("2517")
      if ‘free’
	      account.subscriptionEndDate = effective_date

vanilla-passport-example.js

app.get('/auth/github',
  passport.authenticate('github')
);

app.get('/auth/github/callback', 
  passport.authenticate('github', { failureRedirect: '/login' }),
  (req, res) => {
    // Successful authentication, redirect home.
    res.redirect('/');
  }
);