Class: Keepr::Posting

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/keepr/posting.rb

Constant Summary collapse

SIDE_DEBIT = 
'debit'
SIDE_CREDIT = 
'credit'

Instance Method Summary collapse

Instance Method Details

#amount ⇒ Object 



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# File 'lib/keepr/posting.rb', line 55

def amount
  raw_amount.try(:abs)
end

#amount=(value) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/keepr/posting.rb', line 59

def amount=(value)
  @side ||= SIDE_DEBIT

  unless value
    self.raw_amount = nil
    return
  end

  raise ArgumentError, 'Negative amount not allowed!' if value.to_d.negative?

  self.raw_amount = credit? ? -value.to_d : value.to_d
end

#credit? ⇒ Boolean 



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# File 'lib/keepr/posting.rb', line 43

def credit?
  side == SIDE_CREDIT
end

#debit? ⇒ Boolean 



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# File 'lib/keepr/posting.rb', line 39

def debit?
  side == SIDE_DEBIT
end

#raw_amount ⇒ Object 



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# File 'lib/keepr/posting.rb', line 47

def raw_amount
  read_attribute(:amount)
end

#raw_amount=(value) ⇒ Object 



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# File 'lib/keepr/posting.rb', line 51

def raw_amount=(value)
  write_attribute(:amount, value)
end

#side ⇒ Object 



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# File 'lib/keepr/posting.rb', line 20

def side
  @side || begin
    (raw_amount.negative? ? SIDE_CREDIT : SIDE_DEBIT) if raw_amount
  end
end

#side=(value) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/keepr/posting.rb', line 26

def side=(value)
  raise ArgumentError unless [SIDE_DEBIT, SIDE_CREDIT].include?(value)

  @side = value
  return unless amount

  if credit?
    self.raw_amount = -amount.to_d
  elsif debit?
    self.raw_amount =  amount.to_d
  end
end