Module: Device::Helper

Included in:
IO, ParamsDat, ISO8583::Bitmap
Defined in:
lib/device/helper.rb

Instance Method Summary collapse

Instance Method Details

#attach ⇒ Object 



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# File 'lib/device/helper.rb', line 17

def attach
  Device::Display.clear
  puts "Connecting..."
  if Device::Network.connected? < 0
    if (ret = Device::Network.attach) == 0
      puts "Connected #{ret}"
    else
      puts "Attach fail #{ret}"
      sleep 4
      return false
    end
  else
    puts "Already connected"
  end
  true
end

#check_download_error(ret) ⇒ Object

TODO Add i18n or something



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# File 'lib/device/helper.rb', line 35

def check_download_error(ret)
  value = true
  case ret
  when Device::Transaction::Download::SERIAL_NUMBER_NOT_FOUND
    puts "Serial number not found."
    value =  false
  when Device::Transaction::Download::FILE_NOT_FOUND
    puts "File not found."
    value = false
  when Device::Transaction::Download::FILE_NOT_CHANGE
    puts "File is the same."
  when Device::Transaction::Download::SUCCESS
    puts "Success."
  when Device::Transaction::Download::COMMUNICATION_ERROR
    puts "Communication failure."
    value = false
  when Device::Transaction::Download::MAPREDUCE_RESPONSE_ERROR
    puts "Encoding error."
    value = false
  when Device::Transaction::Download::IO_ERROR
    puts "IO Error."
    value = false
  else
    puts "Communication fail."
    value = false
  end

  value
end

#form(label, options = {}) ⇒ Object 



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# File 'lib/device/helper.rb', line 7

def form(label, options = {})
  Device::Display.clear
  options = form_default(options)
  default = options.delete(:default)
  puts "#{label} (#{default}):"
  string = get_format(options.delete(:min), options.delete(:max), options)
  return default if string.nil? || string.empty?
  string
end

#ljust(string, size, new_string) ⇒ Object 



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# File 'lib/device/helper.rb', line 127

def ljust(string, size, new_string)
  string_plain = string.to_s
  if size > string_plain.size
    string_plain + (new_string * (size - string_plain.size))
  else
    string_plain
  end
end

#menu(title, selection, options = {}) ⇒ Object

Examples:

{
  :default => {:detail => 10}, # default value to return if enter
  :number => true, # Add number to label or not
  "option X" => {:detail => 10},
  "option Y" => {:detail => 11}
}



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# File 'lib/device/helper.rb', line 72

def menu(title, selection, options = {})
  options[:number] = true if options[:number].nil?

  Device::Display.clear
  print_title(title, options[:default])
  values = Hash.new
  selection.each_with_index do |value,i|
    values[i.to_i] = value[1]
    if options[:number]
      Device::Display.print("#{i+1} - #{value[0]}", i+2, 0)
    else
      Device::Display.print(value[0], i+2, 0)
    end
  end

  key = getc

  return options[:default] if key == IO::ENTER || key == IO::CANCEL
  [values[key.to_i - 1]].flatten.first
end

#number_to_currency(value, options = {}) ⇒ Object 



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# File 'lib/device/helper.rb', line 93

def number_to_currency(value, options = {})
  options[:delimiter] ||= ","
  options[:precision] ||= 2
  options[:separator] ||= "."

  if value.is_a? Float
    number, unit = value.to_s.split(".")
    unit = unit.to_s
    len = number.size + unit.size
  else
    len    = value.to_s.size
    unit   = value.to_s[(len - options[:precision])..-1]
    if len <= options[:precision]
      number = ""
    else
      number = value.to_s[0..(len - (options[:precision] + 1)).abs]
    end
  end

  text = ""
  i = 0
  number.reverse.each_char do |ch|
    i += 1
    text << ch
    text << options[:delimiter] if (i % 3 == 0) && (len - unit.size) != i
  end
  currency = [rjust(text.reverse, 1, "0"),rjust(unit, options[:precision], "0")].join options[:separator]
  if options[:label]
    options[:label] + currency
  else
    currency
  end
end

#rjust(string, size, new_string) ⇒ Object 



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# File 'lib/device/helper.rb', line 136

def rjust(string, size, new_string)
  string_plain = string.to_s
  if size > string_plain.size
    (new_string * (size - string_plain.size)) + string_plain
  else
    string_plain
  end
end