foodsoft/app/models/ordergroup.rb

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# == Schema Information
# Schema version: 20090120184410
#
# Table name: groups
#
# id :integer not null, primary key
# type :string(255) default(""), not null
# name :string(255) default(""), not null
# description :string(255)
# account_balance :decimal(, ) default(0.0), not null
# account_updated :datetime
# created_on :datetime not null
# role_admin :boolean not null
# role_suppliers :boolean not null
# role_article_meta :boolean not null
# role_finance :boolean not null
# role_orders :boolean not null
# weekly_task :boolean
# weekday :integer
# task_name :string(255)
# task_description :string(255)
# task_required_users :integer default(1)
# deleted_at :datetime
# contact_person :string(255)
# contact_phone :string(255)
# contact_address :string(255)
#
# Ordergroups can order, they are "children" of the class Group
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#
# Ordergroup have the following attributes, in addition to Group
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# * account_balance (decimal)
# * account_updated (datetime)
class Ordergroup < Group
acts_as_paranoid # Avoid deleting the ordergroup for consistency of order-results
extend ActiveSupport::Memoizable # Ability to cache method results. Use memoize :expensive_method
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has_many :financial_transactions, :order => "created_on DESC"
has_many :group_orders
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has_many :orders, :through => :group_orders
validates_numericality_of :account_balance, :message => 'ist keine gültige Zahl'
def contact
"#{contact_phone} (#{contact_person})"
end
def non_members
User.all(:order => 'nick').reject { |u| (users.include?(u) || u.ordergroup) }
end
def value_of_open_orders(exclude = nil)
group_orders.open.reject{|go| go == exclude}.collect(&:price).sum
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end
def value_of_finished_orders(exclude = nil)
group_orders.finished.reject{|go| go == exclude}.collect(&:price).sum
end
# Returns the available funds for this order group (the account_balance minus price of all non-closed GroupOrders of this group).
# * exclude (GroupOrder): exclude this GroupOrder from the calculation
def get_available_funds(exclude = nil)
account_balance - value_of_open_orders(exclude) - value_of_finished_orders(exclude)
end
memoize :get_available_funds
# Creates a new FinancialTransaction for this Ordergroup and updates the account_balance accordingly.
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# Throws an exception if it fails.
def add_financial_transaction(amount, note, user)
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transaction do
trans = FinancialTransaction.new(:ordergroup => self, :amount => amount, :note => note, :user => user)
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trans.save!
self.account_balance += trans.amount
self.account_updated = trans.created_on
save!
notify_negative_balance(trans)
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end
end
private
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# If this order group's account balance is made negative by the given/last transaction,
# a message is sent to all users who have enabled notification.
def notify_negative_balance(transaction)
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# Notify only when order group had a positive balance before the last transaction:
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if (transaction.amount < 0 && self.account_balance < 0 && self.account_balance - transaction.amount >= 0)
for user in users
Mailer.deliver_negative_balance(user,transaction) if user.settings["notify.negativeBalance"] == '1'
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end
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end
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end
end