Class: BetaBrite

Inherits:
Object
  • Object
show all
Defined in:
lib/betabrite.rb,
lib/string.rb,
lib/bb_version.rb,
lib/memory/memory.rb,
lib/files/dotsfile.rb,
lib/files/textfile.rb,
lib/files/stringfile.rb

Overview

Synopsis

This class assembles all packets (different files) and yields the data that needs to be written back to the caller of the BetaBrite#write method.

Defined Under Namespace

Classes: DotsFile, Memory, String, StringFile, TextFile

Constant Summary collapse

HEADER = 
[ 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 ]
STX = 
0x02.chr
ETX = 
0x03.chr
EOT = 
0x04.chr
ESC = 
0x1b.chr
DLE = 
0x10.chr
STRING = 
0x14.chr
CR = 
0x0d.chr
MEMORY_CODE = 
"E$"
SIGN_TYPE =

Beta Brite sign

0x5a.chr
Version = 
'0.0.1'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BetaBrite

Returns a new instance of BetaBrite.



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# File 'lib/betabrite.rb', line 28

def initialize
  # Default address is "00" which means broadcast to all signs
  @sign_address = [ 0x30, 0x30 ]
  @string_files = []
  @text_files   = []
  @dots_files   = []
  @memory       = []

  # This shouldn't change except for unit testing
  @sleep_time = 1
end

Instance Attribute Details

#dots_files ⇒ Object (readonly)

Returns the value of attribute dots_files.



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# File 'lib/betabrite.rb', line 26

def dots_files
  @dots_files
end

#sleep_time ⇒ Object (readonly)

Returns the value of attribute sleep_time.



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# File 'lib/betabrite.rb', line 25

def sleep_time
  @sleep_time
end

#string_files ⇒ Object (readonly)

Returns the value of attribute string_files.



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# File 'lib/betabrite.rb', line 26

def string_files
  @string_files
end

#text_files ⇒ Object (readonly)

Returns the value of attribute text_files.



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# File 'lib/betabrite.rb', line 26

def text_files
  @text_files
end

Instance Method Details

#add(packet) ⇒ Object 



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# File 'lib/betabrite.rb', line 49

def add(packet)
  if packet.is_a? BetaBrite::Memory
    add_memory packet
  elsif packet.is_a? BetaBrite::StringFile
    add_stringfile packet
  elsif packet.is_a? BetaBrite::TextFile
    add_textfile packet
  elsif packet.is_a? BetaBrite::DotsFile
    add_dotsfile packet
  end
end

#add_dotsfile(packet) ⇒ Object 



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# File 'lib/betabrite.rb', line 69

def add_dotsfile(packet)
  @dots_files << packet
end

#add_memory(packet) ⇒ Object 



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# File 'lib/betabrite.rb', line 73

def add_memory(packet)
  @memory << packet
end

#add_stringfile(packet) ⇒ Object 



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# File 'lib/betabrite.rb', line 61

def add_stringfile(packet)
  @string_files << packet
end

#add_textfile(packet) ⇒ Object 



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# File 'lib/betabrite.rb', line 65

def add_textfile(packet)
  @text_files << packet
end

#allocate(&block) ⇒ Object

This method is used to allocate memory on the sign



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# File 'lib/betabrite.rb', line 99

def allocate(&block)
  if @memory.length > 0
    write_header &block
    yield STX
    yield MEMORY_CODE
    @memory.each { |packet| yield packet.to_s }
    write_end &block
  end
end

#header ⇒ Object 



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# File 'lib/betabrite.rb', line 40

def header
  header_str = HEADER.collect { |a| a.chr }.join
  header_str << SIGN_TYPE << @sign_address.collect { |a| a.chr }.join
end

#inspect ⇒ Object 



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# File 'lib/betabrite.rb', line 45

def inspect
  header
end

#write(&block) ⇒ Object

This method is used to write on the sign



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# File 'lib/betabrite.rb', line 78

def write(&block)
  if @text_files.length > 0 || @string_files.length > 0
    write_header &block
    @text_files.each { |packet| yield packet.to_s }
    @string_files.each { |packet| block.call(packet.to_s) }
    write_end &block
  end
end

#write_dots(&block) ⇒ Object 



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# File 'lib/betabrite.rb', line 87

def write_dots(&block)
  if @dots_files.length > 0
    write_header &block
    @dots_files.each { |packet|
      yield packet.to_s
      sleep sleep_time
    }
    write_end &block
  end
end