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Contents
module Imb
# This class represents a Barcode ID
class BarcodeId
# The allowable range of a barcode ID
RANGE = 0..94
# The allowable range of a barcode ID's least significant digit
LSD_RANGE = 0..4
# Turn the argument into a BarcodeID if possible. Accepts:
# * BarcodeId
# * String
# * Integer
def self.coerce(o)
case o
when BarcodeId
o
when String
new(o.to_i)
when Integer
new(o)
else
raise ArgumentError, 'Cannot coerce to BarcodeId'
end
end
# Create a new BarcodeId
# * +value+ - The integer value of the barcode ID
def initialize(value)
@value = value
end
# Validate the value. Raises ArgumentError if out of range.
# * +long_mailer_id+ - truthy if the mailer ID is long (9 digits).
def validate(long_mailer_id)
unless RANGE === @value
raise ArgumentError, "Must be #{RANGE}"
end
unless LSD_RANGE === least_significant_digit
raise ArgumentError, "Least significant digit must be #{LSD_RANGE}"
end
end
# Return true if +o+ is equal. +o+ may be any object which ::coerce
# can turn into a BarcodeId.
def ==(o)
BarcodeId.coerce(o).to_i == to_i
rescue ArgumentError
false
end
# Add this object's value to target, shifting it left as many
# digts as are needed to make room.
def shift_and_add_to(target, long_mailer_id)
target *= 10
target += most_significant_digit
target *= 5
target += least_significant_digit
target
end
# Return the integer value of the barcode ID
def to_i
@value
end
private
def most_significant_digit
@value / 10
end
def least_significant_digit
@value % 10
end
end
end
Version data entries
3 entries across 3 versions & 1 rubygems