WIP: creating payment schedule workers

see TODO in app/workers/payment_schedule*

app/models/payment_schedule.rb

@@ -18,6 +18,7 @@ class PaymentSchedule < PaymentDocument
 
   before_create :add_environment
   after_create :update_reference, :chain_record
+  after_commit :generate_and_send_document, on: [:create], if: :persisted?
 
   def file
     dir = "payment_schedules/#{invoicing_profile.id}"
@@ -47,4 +48,16 @@ class PaymentSchedule < PaymentDocument
   def check_footprint
     payment_schedule_items.map(&:check_footprint).all? && footprint == compute_footprint
   end
+
+  private
+
+  def generate_and_send_document
+    return unless Setting.get('invoicing_module')
+
+    unless Rails.env.test?
+      puts "Creating an InvoiceWorker job to generate the following invoice: id(#{id}), invoiced_id(#{invoiced_id}), " \
+           "invoiced_type(#{invoiced_type}), user_id(#{invoicing_profile.user_id})"
+    end
+    InvoiceWorker.perform_async(id, user&.subscription&.expired_at)
+  end
 end

app/workers/invoice_worker.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+
+# Generates the PDF Document associated with the provided invoice, and send it to the customer
 class InvoiceWorker
   include Sidekiq::Worker
 

app/workers/payment_schedule_item_worker.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+# Periodically checks if a PaymentScheduleItem cames to its due date.
+# If this is the case
+class PaymentScheduleItemWorker
+  include Sidekiq::Worker
+
+  def perform
+    PaymentScheduleItem.where(due_date: [DateTime.current.at_beginning_of_day, DateTime.current.end_of_day], state: 'new').each do |psi|
+      # the following depends on the payment method (stripe/check)
+      if psi.payment_schedule.payment_method == 'stripe'
+        # TODO, if stripe:
+        # - verify the payment was successful
+        #   - if not, alert the admins
+        #   - if succeeded, generate the invoice
+      else
+        # TODO, if check:
+        # - alert the admins and the user that it is time to bank the check
+        # - generate the invoice
+      end
+      # TODO, finally, in any cases, update the psi.state field according to the new status
+    end
+  end
+end

app/workers/payment_schedule_worker.rb

@@ -1,21 +1,21 @@
 # frozen_string_literal: true
 
-# Periodically checks if a PaymentScheduleItem cames to its due date.
+# Generates the PDF Document associated with the provided payment schedule, and send it to the customer
 # If this is the case
 class PaymentScheduleWorker
   include Sidekiq::Worker
 
-  def perform
-    PaymentScheduleItem.where(due_date: [DateTime.current.at_beginning_of_day, DateTime.current.end_of_day], state: 'new').each do |psi|
-      # the following depends on the payment method (stripe/check)
-      # if stripe:
-      # - verify the payment was successful
-      #   - if not, alert the admins
-      #   - if succeeded, generate the invoice
-      # if check:
-      # - alert the admins and the user that it is time to bank the check
-      # - generate the invoice
-      # finally, in any cases, update the psi.state field according to the new status
-    end
+  def perform(payment_schedule_id)
+    # generate a payment schedule document
+    ps = PaymentSchedule.find(payment_schedule_id)
+    pdf = ::PDF::PaymentSchedule.new(ps).render # TODO, create ::PDF::PaymentSchedule
+
+    # save the file on the disk
+    File.binwrite(ps.file, pdf)
+
+    # notify user, send schedule document by email
+    NotificationCenter.call type: 'notify_user_when_invoice_ready', # TODO, create a more appropriate notification type
+                            receiver: ps.user,
+                            attached_object: ps
   end
 end