class FeduxOrgStdlib::ShellLanguageDetector

Detect language of shell

@example Simple Usage

detector = ShellLanguageDetector.new
lang = detector.detect
puts lang.language_code
puts lang.country_code
puts lang.encoding

@example Overwrite detected lang

detector = ShellLanguageDetector.new
lang = detector.detect(overwrite: [:de, :de, :utf_8]

@example Allowed languages

detector = ShellLanguageDetector.new
lang = detector.detect(allowed: [:de, :en])

Attributes

default_country_code[R]
default_encoding[R]
default_language_code[R]
environment[R]

Public Class Methods

new(default_language_code: :en, default_country_code: :gb, default_encoding: :utf_8, environment: ProcessEnvironment.new) click to toggle source
# File lib/fedux_org_stdlib/shell_language_detector.rb, line 32
def initialize(default_language_code: :en, default_country_code: :gb, default_encoding: :utf_8, environment: ProcessEnvironment.new)
  @default_language_code = default_language_code.to_sym
  @default_country_code  = default_country_code.to_sym
  @default_encoding      = default_encoding.to_sym
  @environment           = environment
end

Public Instance Methods

detect(allowed: [], overwrite: []) click to toggle source

@param [Array, Symbol, String] allowed

The languages which are allowed

@return [Language]

The detected language or the default language if no allowed language was detected
# File lib/fedux_org_stdlib/shell_language_detector.rb, line 44
def detect(allowed: [], overwrite: [])
  allowed   = Array(allowed).map(&:to_sym)
  overwrite = Array(overwrite).map(&:to_sym)

  lang = environment.fetch 'LANG'
  language_code, country_code, encoding = lang.scan(/([^_-]+)[_-]([^.]+)\.([A-Za-z0-9_-]*)/i).flatten.map(&:downcase).map { |e| e.gsub('-', '_') }.map { |e| e.to_sym unless e.nil? }
  language_code, country_code, encoding = *overwrite if !overwrite.blank? && overwrite.none?(&:blank?)

  return Language.new(language_code: language_code, country_code: country_code, encoding: encoding) if language_code && (allowed.blank? || allowed.include?(language_code))
  Language.new(language_code: default_language_code, country_code: default_country_code, encoding: default_encoding)
end