Class: RBook::Bisac::Message

Inherits:
Object
  • Object
show all
Defined in:
lib/rbook/bisac/message.rb

Overview

Represents a single Bisac File. See RBook::Bisac for a basic usage example.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(company, san, batch, code) ⇒ Message

creates a new bisac file in memory params:

  • company = company name (10 chars)

  • san = company SAN number (12 chars)

  • batch = batch name for this file (6 chars)

  • code = 1 for new titles, 2 for updated titles (1 char)



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# File 'lib/rbook/bisac/message.rb', line 18

def initialize(company, san, batch, code)
  @company = company
  @san = san
  @batch = batch
  @code = code
  @products = []
end

Instance Attribute Details

#batch ⇒ Object

Returns the value of attribute batch.



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# File 'lib/rbook/bisac/message.rb', line 10

def batch
  @batch
end

#code ⇒ Object

Returns the value of attribute code.



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# File 'lib/rbook/bisac/message.rb', line 10

def code
  @code
end

#company ⇒ Object

Returns the value of attribute company.



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# File 'lib/rbook/bisac/message.rb', line 10

def company
  @company
end

#products ⇒ Object

Returns the value of attribute products.



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# File 'lib/rbook/bisac/message.rb', line 10

def products
  @products
end

#san ⇒ Object

Returns the value of attribute san.



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# File 'lib/rbook/bisac/message.rb', line 10

def san
  @san
end

Class Method Details

.load(filename) ⇒ Object

loads the requested BISAC file into memory. returns a Message object or nil if the file is not a BISAC file



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# File 'lib/rbook/bisac/message.rb', line 29

def self.load(filename)
  msg = self.new(nil,nil,nil,nil)
  
  File.open(filename, "r") do |f|
    f.each_line do |l|
      if l[0,10].eql?("**HEADER**") 
        msg.company = l[16,10].strip
        msg.san = l[26,12].strip
        msg.batch = l[38,6].strip
        msg.code = l[44,1].strip
      elsif !l[0,11].eql?("**TRAILER**") 
        product = RBook::Bisac::Product.from_string(l)
        msg << product unless product.nil?
      end
    end
  end
  
  if msg.company.nil? || msg.san.nil? || msg.batch.nil? || msg.code.nil?
    return nil
  else
    return msg
  end
end

Instance Method Details

#<<(item) ⇒ Object

adds a new title to the bisic file. Expects a Rbook::Bisac::Product object.



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# File 'lib/rbook/bisac/message.rb', line 54

def << (item)
  unless item.class == RBook::Bisac::Product
    raise ArgumentError, 'item must be a RBook::Bisac::Product object'
  end
  @products << item
end

#to_s ⇒ Object

converts this bisac file into a string



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# File 'lib/rbook/bisac/message.rb', line 62

def to_s
  # File Header
  content = "**HEADER**"
  content << Time.now.strftime("%y%m%d")
  content << @company[0,10].ljust(10)
  content << @san[0,12].ljust(12)
  content << @batch[0,6].ljust(6)
  content << @code[0,1].ljust(1)
  content << "**PUBSTAT*"
  content << "040"
  content << "".ljust(201)
  content << "\n"

  # File Content
  counter = 0
  @products.each do |item|
    content << item.to_s + "\n"
    counter = counter + 1
  end

  # File Footer
  content << "**TRAILER*"
  content << Time.now.strftime("%y%m%d")
  content << @batch[0,6].ljust(6)
  content << counter.to_s[0,6].ljust(6)
  content << "**PUBSTAT*"
  content << "".ljust(221)

  return content
end

#write(filename) ⇒ Object

writes the content of this bisac file out to the specified file



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# File 'lib/rbook/bisac/message.rb', line 94

def write(filename)
  File.open(filename, "w") { |f| f.puts to_s }
end