Module: WhirledPeas::Utils::TitleFont

Defined in:
lib/whirled_peas/utils/title_font.rb

Constant Summary collapse

PREFERRED_DEFAULT_FONT = 
:ansishadow
FONT_CACHE = 
File.join(ENV['HOME'] || '.', '.whirled_peas.fonts')

Class Method Summary collapse

Class Method Details

.fonts ⇒ Object 



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# File 'lib/whirled_peas/utils/title_font.rb', line 21

def fonts
  return @fonts if @fonts
  File.exist?(FONT_CACHE) ? load_fonts_from_cache : load_fonts_from_figlet
  @fonts
end

.load_fonts_from_cache ⇒ Object 



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# File 'lib/whirled_peas/utils/title_font.rb', line 27

def load_fonts_from_cache
  require 'json'
  @fonts = {}
  File.open(FONT_CACHE, 'r') do |fp|
    JSON.parse(fp.read).each do |key, value|
      @fonts[key.to_sym] = value
    end
  end
  @fonts
end

.load_fonts_from_figlet ⇒ Object 



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# File 'lib/whirled_peas/utils/title_font.rb', line 38

def load_fonts_from_figlet
  require 'ruby_figlet'
  require 'json'
  @fonts = {}
  RubyFiglet::Figlet.available.strip.split("\n").each do |font|
    # Load the font to be sure it exists on the system
    next unless available?(font)
    string_key = font.downcase.gsub(/\W/, '')
    string_key = "_#{string_key}" if string_key[0] !~ /[a-z]/
    string_key.gsub!(/\d+$/, '')
    next if @fonts.key?(string_key)
    @fonts[string_key.to_sym] = font
  end
  @fonts[:default] ||= @fonts[PREFERRED_DEFAULT_FONT] || @fonts.values.first
  File.open(FONT_CACHE, 'w') { |fp| fp.write(JSON.generate(@fonts)) }
  @fonts
end

.to_s(string, font_key) ⇒ Object 



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# File 'lib/whirled_peas/utils/title_font.rb', line 16

def to_s(string, font_key)
  require 'ruby_figlet'
  RubyFiglet::Figlet.new(string, fonts[font_key]).to_s
end

.validate!(font_key) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/whirled_peas/utils/title_font.rb', line 8

def validate!(font_key)
  return if font_key.nil?
  return font_key if fonts.key?(font_key)
  allowed = fonts.keys.map(&:inspect).sort
  message = "Unrecognized font: '#{font_key.inspect}', expecting one of #{allowed.join(', ')}"
  raise ArgumentError, message
end