class ISO3166::Data

Handles building the in memory store of countries data

def cache 

def cache
  update_cache
end

def cache_dir 

def cache_dir
  @@cache_dir
end

def cache_dir=(value) 

def cache_dir=(value)
  @@cache_dir = value
end

def cache_flush_required? 

def cache_flush_required?
  !locales_to_load.empty? || !locales_to_remove.empty?
end

def call 

def call
  self.class.update_cache[@alpha2]
end

def codes 

def codes
  load_data!
  loaded_codes
end

def datafile_path(file_array) 

def datafile_path(file_array)
  File.join([@@cache_dir] + file_array)
end

def deep_stringify_keys(data) 

def deep_stringify_keys(data)
  data.transform_keys!(&:to_s)
  data.transform_values! do |v|
    v.is_a?(Hash) ? deep_stringify_keys(v) : v
  end
  return data
end

def initialize(alpha2) 

def initialize(alpha2)
  @alpha2 = alpha2.to_s.upcase
end

def internal_codes

Codes that we have translations for in dataset 
def internal_codes
  @@_country_codes - @@registered_data.keys
end

def load_cache(file_array) 

def load_cache(file_array)
  file_path = datafile_path(file_array)
  File.exist?(file_path) ? JSON.parse(File.binread(file_path)) : {}
end

def load_data! 

def load_data!
  return @@cache unless load_required?
  synchronized do
    @@cache = load_cache %w(countries.json)
    @@_country_codes = @@cache.keys
    @@cache = @@cache.merge(@@registered_data)
    @@cache
  end
end

def load_required? 

def load_required?
  synchronized do
    @@cache.empty?
  end
end

def load_translations(locale) 

def load_translations(locale)
  synchronized do
    locale_names = load_cache(['locales', "#{locale}.json"])
    internal_codes.each do |alpha2|
      @@cache[alpha2]['translations'] ||= Translations.new
      @@cache[alpha2]['translations'][locale] = locale_names[alpha2].freeze
      @@cache[alpha2]['translated_names'] = @@cache[alpha2]['translations'].values.freeze
    end
    ISO3166.configuration.loaded_locales << locale
  end
end

def loaded_codes 

def loaded_codes
  @@cache.keys
end

def loaded_locales 

def loaded_locales
  ISO3166.configuration.loaded_locales.map { |l| l.to_s.downcase }
end

def locales_to_load 

def locales_to_load
  requested_locales - loaded_locales
end

def locales_to_remove 

def locales_to_remove
  loaded_locales - requested_locales
end

def register(data)

Overriding an existing country will also remove it from the internal management of translations.
If you are overriding an existing country, this does not perform a deep merge so you will need to __bring in all data you wish to be available__.
Registers a new Country with custom data. 
def register(data)
  alpha2 = data[:alpha2].upcase
  @@registered_data[alpha2] = deep_stringify_keys(data)
  @@registered_data[alpha2]['translations'] = \
    Translations.new.merge(data['translations'] || {})
  @@cache = cache.merge(@@registered_data)
end

def requested_locales 

def requested_locales
  ISO3166.configuration.locales.map { |l| l.to_s.downcase }
end

def reset

Resets the loaded data and cache 
def reset
  @@cache = {}
  @@registered_data = {}
  ISO3166.configuration.loaded_locales = []
end

def sync_translations! 

def sync_translations!
  return unless cache_flush_required?
  locales_to_remove.each do |locale|
    unload_translations(locale)
  end
  locales_to_load.each do |locale|
    load_translations(locale)
  end
end

def synchronized(&block) 

def synchronized(&block)
  if use_mutex?
    @@mutex.synchronize(&block)
  else
    block.call
  end
end

def unload_translations(locale) 

def unload_translations(locale)
  synchronized do
    internal_codes.each do |alpha2|
      @@cache[alpha2]['translations'].delete(locale)
      @@cache[alpha2]['translated_names'] = @@cache[alpha2]['translations'].values.freeze
    end
    ISO3166.configuration.loaded_locales.delete(locale)
  end
end

def unregister(alpha2)

Removes a country from the loaded data 
def unregister(alpha2)
  alpha2 = alpha2.to_s.upcase
  @@cache.delete(alpha2)
  @@registered_data.delete(alpha2)
end

def update_cache 

def update_cache
  load_data!
  sync_translations!
  @@cache
end

def use_mutex? 

def use_mutex?
  # Stubbed in testing
  true
end