tabdelimited.rb

   1 require 'transaction'
   2 require 'accountregister'
   3
   4 ################################################################################
   5 # Exports transactions to and imports transactions from tab-delimited input.
   6 ################################################################################
   7 module TabDelimited
   8
   9   def import
  10     File.open(@filename) do |file|
  11       file.each_line do |line|
  12         line.chomp!
  13         next if line =~ /^#|^$/ # ignore blank, comment lines
  14         add(import_transaction(line))
  15       end
  16     end
  17   end
  18
  19   def export
  20     File.open(@filename, "w") do |file|
  21       each do |transaction|
  22         exported_transaction = [
  23                                 transaction.from,
  24                                 transaction.to,
  25                                 transaction.amount,
  26                                 transaction.date,
  27                                 transaction.description
  28                                ].join("\t")
  29         file.puts(exported_transaction)
  30       end
  31     end
  32   end
  33
  34   private
  35   def import_transaction(line)
  36     transaction_values = line.split(/\t/, -1) # [from, to, amount, date, desc]
  37     from, to, amount, date, description = transaction_values
  38     from = @account_register.open(*from.split('.'))
  39     to = @account_register.open(*to.split('.'))
  40     amount = amount.to_f
  41     date = Date.parse(date)
  42     Transaction.new(from, to, amount, date, description)
  43   end
  44
  45   def export_transaction(transaction)
  46   end
  47 end