merge automatic group order invoice generation

see https://github.com/foodcoops/foodsoft/pull/907 for reference
and original work by viehlieb

Co-authored-by: viehlieb <pf@pragma-shift.net>

fix PDF Pdf

make explicit deposit in invoices work

add ordergroupname to invoice file name

mark bold sum for vat exempt foodcoops

download multiple group order invoice as zip

app/models/concerns/price_calculation.rb

@@ -7,11 +7,27 @@ module PriceCalculation
     add_percent(price + deposit, tax)
   end
 
+  def gross_price_without_deposit
+    add_percent(price, tax)
+  end
+
+  def gross_deposit_price
+    add_percent(deposit, tax)
+  end
+
   # @return [Number] Price for the foodcoop-member.
   def fc_price
     add_percent(gross_price, FoodsoftConfig[:price_markup].to_i)
   end
 
+  def fc_price_without_deposit
+    add_percent(gross_price_without_deposit, FoodsoftConfig[:price_markup].to_i)
+  end
+
+  def fc_deposit_price
+    add_percent(gross_deposit_price, FoodsoftConfig[:price_markup].to_i)
+  end
+
   private
 
   def add_percent(value, percent)

app/models/group_order.rb

@@ -9,6 +9,7 @@ class GroupOrder < ApplicationRecord
   has_many :group_order_articles, dependent: :destroy
   has_many :order_articles, through: :group_order_articles
   has_one :financial_transaction
+  has_one :group_order_invoice
   belongs_to :updated_by, optional: true, class_name: 'User', foreign_key: 'updated_by_user_id'
 
   validates :order_id, presence: true

app/models/group_order_article.rb

@@ -208,6 +208,18 @@ class GroupOrderArticle < ApplicationRecord
     end
   end
 
+  def total_price_without_deposit(order_article = self.order_article)
+    if order_article.order.open?
+      if FoodsoftConfig[:tolerance_is_costly]
+        order_article.price.fc_price_without_deposit * (quantity + tolerance)
+      else
+        order_article.price.fc_price_without_deposit * quantity
+      end
+    else
+      order_article.price.fc_price_without_deposit * result
+    end
+  end
+
   # Check if the result deviates from the result_computed
   def result_manually_changed?
     result != result_computed unless result.nil?

app/models/group_order_invoice.rb

@@ -0,0 +1,58 @@
+class GroupOrderInvoice < ApplicationRecord
+  belongs_to :group_order
+  validates_presence_of :group_order
+  validates_uniqueness_of :invoice_number
+  validate :tax_number_set
+  after_initialize :init, unless: :persisted?
+
+  def generate_invoice_number(count)
+    trailing_number = count.to_s.rjust(4, '0')
+    if GroupOrderInvoice.find_by(invoice_number: self.invoice_date.strftime("%Y%m%d") + trailing_number)
+      generate_invoice_number(count.to_i + 1)
+    else
+      self.invoice_date.strftime("%Y%m%d") + trailing_number
+    end
+  end
+
+  def tax_number_set
+    if FoodsoftConfig[:contact][:tax_number].blank?
+      errors.add(:group_order_invoice, "Keine Steuernummer in FoodsoftConfig :contact gesetzt")
+    end
+  end
+
+  def init
+    self.invoice_date = Time.now unless invoice_date
+    self.invoice_number = generate_invoice_number(1) unless self.invoice_number
+    self.payment_method = FoodsoftConfig[:group_order_invoices]&.[](:payment_method) || I18n.t('activerecord.attributes.group_order_invoice.payment_method') unless self.payment_method
+  end
+
+  def name
+    I18n.t('activerecord.attributes.group_order_invoice.name') + "_#{invoice_number}"
+  end
+
+  def load_data_for_invoice
+    invoice_data = {}
+    order = group_order.order
+    invoice_data[:supplier] = order.supplier.name
+    invoice_data[:ordergroup] = group_order.ordergroup
+    invoice_data[:group_order] = group_order
+    invoice_data[:invoice_number] = invoice_number
+    invoice_data[:invoice_date] = invoice_date
+    invoice_data[:tax_number] = FoodsoftConfig[:contact][:tax_number]
+    invoice_data[:payment_method] = payment_method
+    invoice_data[:order_articles] = {}
+    group_order.order_articles.each do |order_article|
+      # Get the result of last time ordering, if possible
+      goa = group_order.group_order_articles.detect { |tmp_goa| tmp_goa.order_article_id == order_article.id }
+
+      # Build hash with relevant data
+      invoice_data[:order_articles][order_article.id] = {
+        :price => order_article.article.fc_price,
+        :quantity => (goa ? goa.quantity : 0),
+        :total_price => (goa ? goa.total_price : 0),
+        :tax => order_article.article.tax
+      }
+    end
+    invoice_data
+  end
+end

app/models/order.rb

@@ -207,7 +207,7 @@ class Order < ApplicationRecord
   # :fc, guess what...
   def sum(type = :gross)
     total = 0
-    if %i[net gross fc].include?(type)
+    if %i[net gross gross_deposit fc_deposit deposit fc].include?(type)
       for oa in order_articles.ordered.includes(:article, :article_price)
         quantity = oa.units * oa.price.unit_quantity
         case type
@@ -217,6 +217,12 @@ class Order < ApplicationRecord
           total += quantity * oa.price.gross_price
         when :fc
           total += quantity * oa.price.fc_price
+        when :gross_deposit
+          total += quantity * oa.price.gross_deposit_price
+        when :fc_deposit
+          total += quantity * oa.price.fc_deposit_price
+        when :deposit
+          total += quantity * oa.price.deposit
         end
       end
     elsif %i[groups groups_without_markup].include?(type)
@@ -224,7 +230,11 @@ class Order < ApplicationRecord
         for goa in go.group_order_articles
           case type
           when :groups
-            total += goa.result * goa.order_article.price.fc_price
+            total += if FoodsoftConfig[:group_order_invoices]&.[](:separate_deposits)
+                       goa.result * (goa.order_article.price.fc_price + goa.order_article.price.fc_deposit_price)
+                     else
+                       goa.result * goa.order_article.price.fc_price
+                     end
           when :groups_without_markup
             total += goa.result * goa.order_article.price.gross_price
           end