Class: Ingreedy::UnitVariationMapper

Inherits:
Object
  • Object
show all
Defined in:
lib/ingreedy/unit_variation_mapper.rb

Class Method Summary collapse

Class Method Details

.all_variations ⇒ Object 



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# File 'lib/ingreedy/unit_variation_mapper.rb', line 9

def self.all_variations
  # Return these in order of size, descending
  # That way, the longer versions will try to be parsed first, then the shorter versions
  # e.g. so '1 cup flour' will be parsed as 'cup' instead of 'c'
  variations_map.values.flatten.sort { |a, b| b.length <=> a.length }
end

.regexp ⇒ Object 



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# File 'lib/ingreedy/unit_variation_mapper.rb', line 4

def self.regexp
  regexp = all_variations.map { |v| Regexp.escape(v) }.join('|')
  regexp = Regexp.new(regexp, Regexp::IGNORECASE)
end

.unit_from_variation(variation) ⇒ Object 



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# File 'lib/ingreedy/unit_variation_mapper.rb', line 16

def self.unit_from_variation(variation)
  return if variations_map.empty?
  hash_entry_as_array = variations_map.detect { |unit, variations| variations.include?(variation) }

  if hash_entry_as_array
    hash_entry_as_array.first
  else
    # try again with the variation downcased
    # this is a hacky way to deal with the abbreviations for teaspoon and tablespoon
    hash_entry_as_array = variations_map.detect { |unit, variations| variations.include?(variation.downcase) }
    hash_entry_as_array.first
  end
end