Module: Dphil::MetricalData

Defined in:
lib/dphil/metrical_data.rb

Overview

Metrical Data structure imported and parsed from “metrical_data” module at: github.com/shreevatsa/sanskrit

Defined Under Namespace

Classes: IHash, IHashM

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.all ⇒ Object (readonly)

Returns the value of attribute all.



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# File 'lib/dphil/metrical_data.rb', line 14

def all
  @all
end

.meters ⇒ Object (readonly)

Returns the value of attribute meters.



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# File 'lib/dphil/metrical_data.rb', line 14

def meters
  @meters
end

.patterns ⇒ Object (readonly)

Returns the value of attribute patterns.



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# File 'lib/dphil/metrical_data.rb', line 14

def patterns
  @patterns
end

.regexes ⇒ Object (readonly)

Returns the value of attribute regexes.



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# File 'lib/dphil/metrical_data.rb', line 14

def regexes
  @regexes
end

.version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/dphil/metrical_data.rb', line 14

def version
  @version
end

Class Method Details

.load_data! ⇒ Object

This loads and processes the data into the module.



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# File 'lib/dphil/metrical_data.rb', line 20

def self.load_data!
  yml_data = Psych.load_file(File.join(GEM_ROOT, "vendor", "metrical_data.yml"))

  @version = yml_data["commit"].deep_freeze

  # Hash of meters with names as keys and patterns as values
  meters_h = yml_data["meters"].each_with_object({}) do |(name, patterns), h|
    h[Transliterate.unicode_downcase(name)] = patterns
  end
  @meters = IHash.new(meters_h)

  # Hash of meters with patterns for keys and names/padas as values
  patterns_h = yml_data["patterns"].each_with_object({}) do |(type, patterns), type_h|
    type_h[type.to_sym] = (patterns.each_with_object({}) do |(pattern, meters), pattern_h|
      pattern_h[pattern] = meters.each_with_object({}) do |(name, value), name_h|
        name_h[Transliterate.unicode_downcase(name)] = value
      end
    end).sort_by { |(k, _)| k.to_s.length }.reverse.to_h
  end
  @patterns = IHashM.new(patterns_h)

  # Hash of meters with regular expressions for keys and names/padas as values
  regexes_h = yml_data["regexes"].each_with_object({}) do |(type, patterns), type_h|
    type_h[type.to_sym] = (patterns.each_with_object({}) do |(pattern, meters), pattern_h|
      new_pattern = Regexp.new(pattern.source.gsub(/^\^|\$$/, ""))
      pattern_h[new_pattern] = meters.each_with_object({}) do |(name, value), name_h|
        name_h[Transliterate.unicode_downcase(name)] = value
      end
    end).sort_by { |(k, _)| k.to_s.length }.reverse.to_h
  end
  @regexes = IHashM.new(regexes_h)

  @all = IHashM.new(version: version,
                    meters: meters,
                    patterns: patterns,
                    regexes: regexes)
  self
end