Class: RqrcodePngBin::App

Inherits:
Object
  • Object
show all
Defined in:
lib/rqrcode_png_bin/app.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv = []) ⇒ App

Returns a new instance of App.



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# File 'lib/rqrcode_png_bin/app.rb', line 5

def initialize(argv = [])
  @argv   = argv

  @canvas = nil
  @file   = nil
  @level  = :m
  @size   = 4
  @stdin  = nil

  parser.parse!(@argv)
end

Instance Attribute Details

#canvas ⇒ Object (readonly)

Returns the value of attribute canvas.



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# File 'lib/rqrcode_png_bin/app.rb', line 16

def canvas
  @canvas
end

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/rqrcode_png_bin/app.rb', line 16

def file
  @file
end

#level ⇒ Object (readonly)

Returns the value of attribute level.



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# File 'lib/rqrcode_png_bin/app.rb', line 16

def level
  @level
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/rqrcode_png_bin/app.rb', line 16

def size
  @size
end

#stdin ⇒ Object (readonly)

Returns the value of attribute stdin.



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# File 'lib/rqrcode_png_bin/app.rb', line 16

def stdin
  @stdin
end

Instance Method Details

#encoded_str(str) ⇒ Object 



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# File 'lib/rqrcode_png_bin/app.rb', line 39

def encoded_str(str)
  str.encode('SJIS').force_encoding('ASCII-8BIT')
end

#generate_png(str) ⇒ Object 



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# File 'lib/rqrcode_png_bin/app.rb', line 32

def generate_png(str)
  png = RQRCode::QRCode.new(encoded_str(str), opts).to_img
  png = png.resize(*canvas) if canvas

  png
end

#opts ⇒ Object

return

Hash



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# File 'lib/rqrcode_png_bin/app.rb', line 58

def opts
  h = {
    :size  => @size,
    :level => @level
  }
end

#parser ⇒ Object

return

OptionParser



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# File 'lib/rqrcode_png_bin/app.rb', line 68

def parser
  OptionParser.new do |opt|
    opt.version = VERSION
    opt.banner  = "Usage: rqrcode_png [option] string"

    opt.on('-c', '--canvas CANVAS (ex 200x200)') {|v|
      re = %r{\A([0-9]+)x([0-9]+)\z}

      if v =~ re
        @canvas = [$1.to_i, $2.to_i]
      else
        raise ArgumentError, "option canvas should match #{re}"
      end
    }
    opt.on('-f', '--from-file FILE') {|v|
      if File.exist?(v)
        @file = v
      else
        raise ArgumentError, "file you specified '#{v}' does not exist"
      end
    }
    opt.on('-l', '--level LEVEL (default m)') {|v|
      options = %w(l m q h)

      if options.include?(v)
        @level = v.to_sym
      else
        raise ArgumentError, "option level should be included #{options}"
      end
    }
    opt.on('-s', '--size SIZE (default 4)') {|v|
      re = %r{\A[0-9]+\z}

      if v =~ re
        @size = v.to_i
      else
        raise ArgumentError, "option size should match #{re}"
      end
    }
  end
end

#run ⇒ Object 



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# File 'lib/rqrcode_png_bin/app.rb', line 18

def run
  if file
    FileReader.new(file).each {|str, dest|
      open(dest, 'wb') {|f|
        f.puts generate_png(str)
      }
    }
  elsif str
    STDOUT.puts generate_png(str)
  else
    STDERR.puts "rqrcode_png #{VERSION}", '', parser.help
  end
end

#str ⇒ Object

return

String



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# File 'lib/rqrcode_png_bin/app.rb', line 46

def str
  if @argv.first
    @argv.first
  else
    @stdin ||= $stdin.gets
    stdin if stdin.size > 0
  end
end