Class: HeadMusic::Utilities::HashKey

Inherits:
Object
  • Object
show all
Defined in:
lib/head_music/utilities/hash_key.rb

Overview

Util for converting an object to a consistent hash key

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(identifier) ⇒ HashKey

Returns a new instance of HashKey.



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# File 'lib/head_music/utilities/hash_key.rb', line 13

def initialize(identifier)
  @original = identifier
end

Instance Attribute Details

#original ⇒ Object (readonly)

Returns the value of attribute original.



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# File 'lib/head_music/utilities/hash_key.rb', line 11

def original
  @original
end

Class Method Details

.for(identifier) ⇒ Object 



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# File 'lib/head_music/utilities/hash_key.rb', line 6

def self.for(identifier)
  @hash_keys ||= {}
  @hash_keys[identifier] ||= new(identifier).to_sym
end

Instance Method Details

#desymbolized_string ⇒ Object (private) 



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# File 'lib/head_music/utilities/hash_key.rb', line 32

def desymbolized_string
  original.to_s
    .gsub("𝄫", "_double_flat")
    .gsub("♭", "_flat")
    .gsub("♮", "_natural")
    .gsub("♯", "_sharp")
    .gsub("#", "_sharp")
    .gsub("𝄪", "_double_sharp")
end

#normalized_string ⇒ Object (private) 



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# File 'lib/head_music/utilities/hash_key.rb', line 23

def normalized_string
  @normalized_string ||=
    transliterated_string.downcase.gsub(/\W+/, "_")
end

#to_sym ⇒ Object 



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# File 'lib/head_music/utilities/hash_key.rb', line 17

def to_sym
  normalized_string.to_sym
end

#transliterated_string ⇒ Object (private) 



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# File 'lib/head_music/utilities/hash_key.rb', line 28

def transliterated_string
  I18n.transliterate(desymbolized_string)
end