feat: Allow SaaS users to manage subscription within the dashboard (#5059)

enterprise/app/services/enterprise/billing/create_session_service.rb

@@ -0,0 +1,10 @@
+class Enterprise::Billing::CreateSessionService
+  def create_session(customer_id, return_url = ENV.fetch('FRONTEND_URL'))
+    Stripe::BillingPortal::Session.create(
+      {
+        customer: customer_id,
+        return_url: return_url
+      }
+    )
+  end
+end

enterprise/app/services/enterprise/billing/create_stripe_customer_service.rb

@@ -0,0 +1,53 @@
+class Enterprise::Billing::CreateStripeCustomerService
+  pattr_initialize [:account!]
+
+  DEFAULT_QUANTITY = 2
+
+  def perform
+    customer_id = prepare_customer_id
+    subscription = Stripe::Subscription.create(
+      {
+        customer: customer_id,
+        items: [{ price: price_id, quantity: default_quantity }]
+      }
+    )
+    account.update!(
+      custom_attributes: {
+        stripe_customer_id: customer_id,
+        stripe_price_id: subscription['plan']['id'],
+        stripe_product_id: subscription['plan']['product'],
+        plan_name: default_plan['name'],
+        subscribed_quantity: subscription['quantity']
+      }
+    )
+  end
+
+  private
+
+  def prepare_customer_id
+    customer_id = account.custom_attributes['stripe_customer_id']
+    if customer_id.blank?
+      customer = Stripe::Customer.create({ name: account.name, email: billing_email })
+      customer_id = customer.id
+    end
+    customer_id
+  end
+
+  def default_quantity
+    default_plan['default_quantity'] || DEFAULT_QUANTITY
+  end
+
+  def billing_email
+    account.administrators.first.email
+  end
+
+  def default_plan
+    installation_config = InstallationConfig.find_by(name: 'CHATWOOT_CLOUD_PLANS')
+    @default_plan ||= installation_config.value.first
+  end
+
+  def price_id
+    price_ids = default_plan['price_ids']
+    price_ids.first
+  end
+end

enterprise/app/services/enterprise/billing/handle_stripe_event_service.rb

@@ -0,0 +1,41 @@
+class Enterprise::Billing::HandleStripeEventService
+  def perform(event:)
+    ensure_event_context(event)
+    case @event.type
+    when 'customer.subscription.updated'
+      plan = find_plan(subscription['plan']['product'])
+      account.update(
+        custom_attributes: {
+          stripe_customer_id: subscription.customer,
+          stripe_price_id: subscription['plan']['id'],
+          stripe_product_id: subscription['plan']['product'],
+          plan_name: plan['name'],
+          subscribed_quantity: subscription['quantity']
+        }
+      )
+    when 'customer.subscription.deleted'
+      Enterprise::Billing::CreateStripeCustomerService.new(account: account).perform
+    else
+      Rails.logger.debug { "Unhandled event type: #{event.type}" }
+    end
+  end
+
+  private
+
+  def ensure_event_context(event)
+    @event = event
+  end
+
+  def subscription
+    @subscription ||= @event.data.object
+  end
+
+  def account
+    @account ||= Account.where("custom_attributes->>'stripe_customer_id' = ?", subscription.customer).first
+  end
+
+  def find_plan(plan_id)
+    installation_config = InstallationConfig.find_by(name: 'CHATWOOT_CLOUD_PLANS')
+    installation_config.value.find { |config| config['product_id'].include?(plan_id) }
+  end
+end