47 add stripe checkout endpoint (#4147)

* Add self billing feature flag

* Add two core tables for billing

* Remove useless imports

* Remove graphql decorators

* Rename subscriptionProduct table

* WIP: Add stripe config

* Add controller to get product prices

* Add billing service

* Remove unecessary package

* Simplify stripe service

* Code review returns

* Use nestjs param

* Rename subscription to basePlan

* Rename env variable

* Add checkout endpoint

* Remove resolver

* Merge controllers

* Fix security issue

* Handle missing url error

* Add workspaceId in checkout metadata

packages/twenty-server/src/core/billing/billing.controller.ts

@@ -0,0 +1,116 @@
+import {
+  Body,
+  Controller,
+  Get,
+  Param,
+  Post,
+  Res,
+  UseGuards,
+} from '@nestjs/common';
+
+import { Response } from 'express';
+
+import {
+  AvailableProduct,
+  BillingService,
+  PriceData,
+  RecurringInterval,
+} from 'src/core/billing/billing.service';
+import { StripeService } from 'src/core/billing/stripe/stripe.service';
+import { EnvironmentService } from 'src/integrations/environment/environment.service';
+import { AuthUser } from 'src/decorators/auth/auth-user.decorator';
+import { User } from 'src/core/user/user.entity';
+import { JwtAuthGuard } from 'src/guards/jwt.auth.guard';
+
+@Controller('billing')
+export class BillingController {
+  constructor(
+    private readonly stripeService: StripeService,
+    private readonly billingService: BillingService,
+    private readonly environmentService: EnvironmentService,
+  ) {}
+
+  @Get('/product-prices/:product')
+  async get(
+    @Param() params: { product: AvailableProduct },
+    @Res() res: Response<PriceData | { error: string }>,
+  ) {
+    const stripeProductId = this.billingService.getProductStripeId(
+      params.product,
+    );
+
+    if (!stripeProductId) {
+      res.status(404).send({
+        error: `Product '${
+          params.product
+        }' not found, available products are ['${Object.values(
+          AvailableProduct,
+        ).join("','")}']`,
+      });
+
+      return;
+    }
+
+    res.json(await this.billingService.getProductPrices(stripeProductId));
+  }
+
+  @UseGuards(JwtAuthGuard)
+  @Post('/checkout')
+  async post(
+    @AuthUser() user: User,
+    @Body() body: { recurringInterval: RecurringInterval },
+    @Res() res: Response,
+  ) {
+    const productId = this.billingService.getProductStripeId(
+      AvailableProduct.BasePlan,
+    );
+
+    if (!productId) {
+      res
+        .status(404)
+        .send(
+          'BasePlan productId not found, please check your BILLING_STRIPE_BASE_PLAN_PRODUCT_ID env variable',
+        );
+
+      return;
+    }
+
+    const productPrices = await this.billingService.getProductPrices(productId);
+    const recurringInterval = body.recurringInterval;
+    const priceId = productPrices[recurringInterval]?.id;
+
+    if (!priceId) {
+      res
+        .status(404)
+        .send(
+          `BasePlan priceId not found, please check body.recurringInterval and product '${AvailableProduct.BasePlan}' prices`,
+        );
+
+      return;
+    }
+    const frontBaseUrl = this.environmentService.getFrontBaseUrl();
+    const session = await this.stripeService.stripe.checkout.sessions.create({
+      line_items: [
+        {
+          price: priceId,
+          quantity: 1,
+        },
+      ],
+      mode: 'subscription',
+      metadata: {
+        workspaceId: user.defaultWorkspace.id,
+      },
+      customer_email: user.email,
+      success_url: frontBaseUrl,
+      cancel_url: frontBaseUrl,
+    });
+
+    if (!session.url) {
+      res.status(400).send('Error: missing checkout.session.url');
+
+      return;
+    }
+
+    res.redirect(303, session.url);
+  }
+}

packages/twenty-server/src/core/billing/billing.module.ts

@@ -1,13 +1,13 @@
 import { Module } from '@nestjs/common';
 
-import { ProductPriceController } from 'src/core/billing/controllers/product-price.controller';
+import { BillingController } from 'src/core/billing/billing.controller';
 import { EnvironmentModule } from 'src/integrations/environment/environment.module';
 import { BillingService } from 'src/core/billing/billing.service';
 import { StripeModule } from 'src/core/billing/stripe/stripe.module';
 
 @Module({
   imports: [StripeModule],
-  controllers: [ProductPriceController],
+  controllers: [BillingController],
   providers: [EnvironmentModule, BillingService],
 })
 export class BillingModule {}

packages/twenty-server/src/core/billing/billing.service.ts

@@ -3,24 +3,39 @@ import { Injectable } from '@nestjs/common';
 import Stripe from 'stripe';
 
 import { EnvironmentService } from 'src/integrations/environment/environment.service';
+import { StripeService } from 'src/core/billing/stripe/stripe.service';
 
 export type PriceData = Partial<
   Record<Stripe.Price.Recurring.Interval, Stripe.Price>
 >;
 export enum AvailableProduct {
   BasePlan = 'base-plan',
 }
-
+export enum RecurringInterval {
+  MONTH = 'month',
+  YEAR = 'year',
+}
 @Injectable()
 export class BillingService {
-  constructor(private readonly environmentService: EnvironmentService) {}
+  constructor(
+    private readonly stripeService: StripeService,
+    private readonly environmentService: EnvironmentService,
+  ) {}
 
   getProductStripeId(product: AvailableProduct) {
     if (product === AvailableProduct.BasePlan) {
       return this.environmentService.getBillingStripeBasePlanProductId();
     }
   }
 
+  async getProductPrices(stripeProductId: string) {
+    const productPrices = await this.stripeService.stripe.prices.search({
+      query: `product: '${stripeProductId}'`,
+    });
+
+    return this.formatProductPrices(productPrices.data);
+  }
+
   formatProductPrices(prices: Stripe.Price[]) {
     const result: PriceData = {};