Module: I18n::Tasks::PluralKeys

Included in:
BaseTask, Data::Tree::Siblings
Defined in:
lib/i18n/tasks/plural_keys.rb

Constant Summary collapse

CLDR_CATEGORY_KEYS =

Ref: http://cldr.unicode.org/index/cldr-spec/plural-rules

%w[zero one two few many other].freeze
PLURAL_KEY_SUFFIXES = 
Set.new CLDR_CATEGORY_KEYS
PLURAL_KEY_RE = 
/\.(?:#{CLDR_CATEGORY_KEYS * "|"})$/
EXPLICIT_0_1 =

Ref: https://unicode-org.github.io/cldr/ldml/tr35-numbers.html#Explicit_0_1_rules

%w[0 1].freeze

Instance Method Summary collapse

Instance Method Details

#collapse_plural_nodes!(tree) ⇒ Object 



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# File 'lib/i18n/tasks/plural_keys.rb', line 12

def collapse_plural_nodes!(tree)
  tree.leaves.map(&:parent).compact.uniq.each do |node|
    children = node.children
    next unless plural_forms?(children)

    node.value = children.to_hash
    node.children = nil
    node.data.merge! children.first.data
  end
  tree
end

#depluralize_key(key, locale = base_locale) ⇒ String

Returns the base form if the key is a specific plural form (e.g. apple for apple.many), the key otherwise.

Parameters:

  • key (String) —

    i18n key

  • locale (String) (defaults to: base_locale) —

    to pull key data from

Returns:

  • (String) —

    the base form if the key is a specific plural form (e.g. apple for apple.many), the key otherwise.



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# File 'lib/i18n/tasks/plural_keys.rb', line 27

def depluralize_key(key, locale = base_locale)
  return key if key !~ PLURAL_KEY_RE

  key_name = last_key_part(key)
  parent_key = key[0..- (key_name.length + 2)]
  nodes = tree("#{locale}.#{parent_key}").presence || (locale != base_locale && tree("#{base_locale}.#{parent_key}"))
  if nodes && plural_forms?(nodes)
    parent_key
  else
    key
  end
end

#plural_forms?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/i18n/tasks/plural_keys.rb', line 56

def plural_forms?(s)
  s.present? && s.all? { |node| node.leaf? && plural_suffix?(node.key) }
end

#plural_nodes(tree) {|node| ... } ⇒ Object

Parameters:

Yield Parameters:



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# File 'lib/i18n/tasks/plural_keys.rb', line 42

def plural_nodes(tree)
  return to_enum(:plural_nodes, tree) unless block_given?

  visited = Set.new
  tree.leaves do |node|
    parent = node.parent
    next if !parent || visited.include?(parent)

    yield parent if plural_forms?(parent.children)
    visited.add(parent)
  end
  self
end

#plural_suffix?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/i18n/tasks/plural_keys.rb', line 60

def plural_suffix?(key)
  PLURAL_KEY_SUFFIXES.include?(key) || EXPLICIT_0_1.include?(key)
end