Module: ContentfulMigrations::Utils

Included in:
MigrationProxy, Migrator
Defined in:
lib/contentful_migrations/utils.rb

Instance Method Summary collapse

Instance Method Details

#camelize(term, uppercase_first_letter = true) ⇒ Object

This method was taken from ActiveSupport::Inflector to avoid having a dependency on ActiveSupport in this project. api.rubyonrails.org/classes/ActiveSupport/Inflector.html#method-i-constantize



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# File 'lib/contentful_migrations/utils.rb', line 6

def camelize(term, uppercase_first_letter = true)
  string = term.to_s
  string = if uppercase_first_letter
    string.sub(/^[a-z\d]*/, &:capitalize)
  else
    string.sub(/^((?=\b|[A-Z_])|\w)/, &:downcase)
           end
  string.gsub!(/(?:_|(\/))([a-z\d]*)/i) { "#{Regexp.last_match(1)}#{Regexp.last_match(2).capitalize}" }
  string.gsub!('/'.freeze, '::'.freeze)
  string
end

#constantize(camel_cased_word) ⇒ Object

This method was taken from ActiveSupport::Inflector to avoid having a dependency on ActiveSupport in this project. api.rubyonrails.org/classes/ActiveSupport/Inflector.html#method-i-constantize



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# File 'lib/contentful_migrations/utils.rb', line 21

def constantize(camel_cased_word)
  names = camel_cased_word.split('::'.freeze)

  # Trigger a built-in NameError exception including the ill-formed constant in the message.
  Object.const_get(camel_cased_word) if names.empty?

  # Remove the first blank element in case of '::ClassName' notation.
  names.shift if names.size > 1 && names.first.empty?

  names.inject(Object) do |constant, name|
    if constant == Object
      constant.const_get(name)
    else
      candidate = constant.const_get(name)
      next candidate if constant.const_defined?(name, false)
      next candidate unless Object.const_defined?(name)

      # Go down the ancestors to check if it is owned directly. The check
      # stops when we reach Object or the end of ancestors tree.
      constant = constant.ancestors.each_with_object(constant) do |ancestor, const|
        break const    if ancestor == Object
        break ancestor if ancestor.const_defined?(name, false)
      end

      # owner is in Object, so raise
      constant.const_get(name, false)
    end
  end
end