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

  @border_modules = 4
  @canvas = nil
  @file   = nil
  @level  = :m
  @mode   = nil
  @px_per_module = nil
  @size   = 4
  @stdin  = nil
  @try_larger = false

  parser.parse!(@argv)
end

Instance Attribute Details

#border_modules ⇒ Object (readonly)

Returns the value of attribute border_modules.



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# File 'lib/rqrcode_png_bin/app.rb', line 20

def border_modules
  @border_modules
end

#canvas ⇒ Object (readonly)

Returns the value of attribute canvas.



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# File 'lib/rqrcode_png_bin/app.rb', line 20

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 20

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 20

def level
  @level
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/rqrcode_png_bin/app.rb', line 20

def mode
  @mode
end

#px_per_module ⇒ Object (readonly)

Returns the value of attribute px_per_module.



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# File 'lib/rqrcode_png_bin/app.rb', line 20

def px_per_module
  @px_per_module
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/rqrcode_png_bin/app.rb', line 20

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 20

def stdin
  @stdin
end

Instance Method Details

#encoded_str(str) ⇒ Object 



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# File 'lib/rqrcode_png_bin/app.rb', line 53

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 37

def generate_png(str)
  qr_opts = opts.dup

  begin
    RQRCode::QRCode.new(encoded_str(str), qr_opts).as_png(png_opts)
  rescue RQRCode::QRCodeRunTimeError => e
    if @try_larger && qr_opts[:size] < 40
      qr_opts[:size] = qr_opts[:size] + 1
      STDERR.puts "retrying #{str} with options #{qr_opts}"
      retry
    else
      raise e
    end
  end
end

#opts ⇒ Object

return

Hash



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# File 'lib/rqrcode_png_bin/app.rb', line 72

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

  h[:mode] = @mode if @mode

  h
end

#parser ⇒ Object

return

OptionParser



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# File 'lib/rqrcode_png_bin/app.rb', line 96

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

    opt.on('-b', '--border-modules BORDER') {|v|
      if v =~ /\A[0-9]+\z/
        @border_modules = v.to_i
      else
        raise ArgumentError, "option border modules should be integer"
      end
    }
    opt.on('-c', '--canvas CANVAS (ex 200)') {|v|
      if v =~ /\A[0-9]+\z/
        @canvas = v.to_i
      else
        raise ArgumentError, "option canvas should match be integer"
      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 l|m|q|h (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('-m', '--mode MODE') {|v|
      options = %w(number alphanumeric byte_8bit)

      if options.include?(v)
        @mode = v.to_sym
      else
        raise ArgumentError, "option mode should be included #{options}"
      end
    }
    opt.on('-p', '--pixels-per-module PIXELS') {|v|
      if v =~ /\A[0-9]+\z/
        @px_per_module = v.to_i
      else
        raise ArgumentError, "option pixels per module should be integer"
      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
    }
    opt.on('-t', '--try-larger') {|v|
      @try_larger = true
    }
  end
end

#png_opts ⇒ Object 



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# File 'lib/rqrcode_png_bin/app.rb', line 83

def png_opts
  h = {}

  h[:size]           = canvas if canvas
  h[:border_modules] = border_modules
  h[:module_px_size] = px_per_module  if px_per_module

  h
end

#run ⇒ Object 



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# File 'lib/rqrcode_png_bin/app.rb', line 22

def run
  if file
    FileReader.new(file).each {|str, dest|
      FileUtils.mkdir_p(File.dirname(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 60

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