Initial commit

app/models/operations.rb

@@ -0,0 +1,67 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+module Operations
+  class << self
+    def build_account_number(currency_id:, account_code:, member_uid: nil)
+      [currency_id.to_s, account_code.to_s, member_uid].compact.join('-')
+    end
+
+    def split_account_number(account_number:)
+      currency_id, code, member_uid = account_number.split('-')
+      { currency_id: currency_id,
+        code: code,
+        member_uid: member_uid }
+    end
+
+    def klass_for(code:)
+      account = Operations::Account.find_by(code: code)
+      { asset: Operations::Asset,
+        liability: Operations::Liability,
+        revenue: Operations::Revenue,
+        expense: Operations::Expense }.fetch(account.type.to_sym)
+    end
+
+    def update_legacy_balance(liability)
+      return unless liability.present? || liability.is_a?(Operations::Liability)
+
+      account = liability.account
+      legacy_account = liability.member.get_account(liability.currency)
+
+      credit = liability.credit
+      debit = liability.debit
+
+      if account.kind.main?
+        if liability.credit.nonzero?
+          legacy_account.plus_funds(credit)
+        else
+          legacy_account.sub_funds(debit)
+        end
+      elsif account.kind.locked?
+        if credit.nonzero?
+          legacy_account.plus_funds(credit)
+          legacy_account.lock_funds(credit)
+        else
+          legacy_account.unlock_and_sub_funds(debit)
+        end
+      end
+    end
+
+    def validate_accounting_equation(operations)
+      balance_sheet = Hash.new(0)
+      assets = operations.select { |op| op.is_a?(Operations::Asset) }
+      liabilities = operations.select { |op| op.is_a?(Operations::Liability) }
+      revenues = operations.select { |op| op.is_a?(Operations::Revenue) }
+      expenses = operations.select { |op| op.is_a?(Operations::Expense) }
+
+      (assets + expenses).each do |op|
+        balance_sheet[op.currency_id] += op.amount
+      end
+      (liabilities + revenues).each do |op|
+        balance_sheet[op.currency_id] -= op.amount
+      end
+
+      balance_sheet.delete_if { |_k, v| v.zero? }.empty?
+    end
+  end
+end