Class: LanguageCards::Comparator

Inherits:
Object
  • Object
show all
Defined in:
lib/language_cards/comparator.rb

Instance Method Summary collapse

Constructor Details

#initialize(mapping_key, mapping, collection) ⇒ Comparator

Returns a new instance of Comparator.



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# File 'lib/language_cards/comparator.rb', line 5

def initialize mapping_key, mapping, collection
  ##
  # @title should be a hash like {"Romaji"=>"Katakana"}
  # @mapping should be an array like [:k, :v]
  raise I18n.t('Error.MappingNotFound') unless mapping.has_key? mapping_key
  begin
    @mapped_as, @mapping = mapping[mapping_key].reduce 
  rescue LocalJumpError
    raise I18n.t('Errors.InvalidMapping')
  end

  @collection = collection
end

Instance Method Details

#given(key, value) ⇒ Object 



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# File 'lib/language_cards/comparator.rb', line 28

def given key, value
  CompBitz.new(
    display: choose_display(key, value),
    collection: @collection,
    expected: choose_expected(key, value),
    value: value,
    mapping: @mapping.first
  )
end

#mapped_as ⇒ Object 



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# File 'lib/language_cards/comparator.rb', line 19

def mapped_as
  case @mapping.first
  when :k
    @mapped_as.keys
  else
    @mapped_as.values
  end
end

#match?(input, comp_bitz) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/language_cards/comparator.rb', line 38

def match? input, comp_bitz
  case comp_bitz.mapping 
  when :k
    comp_bitz.value == comp_bitz.collection[input]
  when :v
    comp_bitz.value == input
  end
end