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@meltheadorable
meltheadorable committed Apr 2, 2024
1 parent 136cc5f commit 5484476
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253 changes: 76 additions & 177 deletions app/models/concerns/translatable.rb
View file
Original file line number Diff line number Diff line change
Expand Up @@ -5,40 +5,42 @@ module Translatable
extend ActiveSupport::Concern

module ClassMethods
def translates(*args)
# Shave off the optional options hash at the end and merge with defaults.
options = args[-1].is_a?(Hash) ? args.delete_at(-1) : {}
# define methods like name_en, etc.
# possible forms:
# name
# name_en
# name("en")
# name(:en)
# name(:en, fallbacks: true)
# name=
# name_en=
#
# the :fallbacks option defines what will happen if the desired translation is not found
# if false (which is the default when an explicit locale is given), nil is returned
# if true, then if the following locales will be tried: I18n.locale, I18n.default_locale,
# any locale with a non-blank translation.
# if all these are undefined then nil will be returned
def translates(*fields)
fields.each do |field|
define_method(field.to_s) do |locale = nil, **kwargs|
fallbacks = kwargs.fetch(:fallbacks, true)
get_translation(field, locale, fallbacks: fallbacks)
end

# Tidy options if given.
options[:locales] = options[:locales].map(&:to_s) if options[:locales].is_a?(Array)
define_method("#{field}=") { |locale = nil, value| set_translation(field, locale, value) }

class_variable_set("@@translate_options", options)
class_variable_set("@@translated_fields", args)
attr_accessor("#{field}_translations") unless ancestors.include?(ActiveRecord::Base)

# Setup an accessor if not present.
translated_fields.each do |f|
attr_accessor("#{f}_translations") unless ancestors.include?(ActiveRecord::Base)
end
# we must override these setters because of the canonical_name setup
define_method("#{field}_translations=") { |value| set_translation_hash(field, value) }

# Setup *_translations assignment handlers for each field.
translated_fields.each do |field|
class_eval %{
def #{field}_translations=(val)
translatable_set_hash('#{field}', val)
end
}
I18n.available_locales.each do |locale|
define_method("#{field}_#{locale}") { get_translation(field, locale, fallbacks: false) }
define_method("#{field}_#{locale}=") { |value| set_translation(field, locale, value) }
end
end
end

# special accessors that we have to use for class vars in concerns
def translated_fields
class_variable_defined?("@@translated_fields") ? class_variable_get("@@translated_fields") : nil
end

def translate_options
class_variable_defined?("@@translate_options") ? class_variable_get("@@translate_options") : nil
end

def validates_translated_length_of(*attr_names)
attr_names = attr_names.map do |attr_name|
attr_name.is_a?(Symbol) ? "#{attr_name}_translations".to_sym : attr_name
Expand All @@ -47,178 +49,75 @@ def validates_translated_length_of(*attr_names)
end
end

# define methods like name_en, etc.
# possible forms:
# name
# name_en
# name("en")
# name(:en)
# name(:en, fallbacks: true)
# name=
# name_en=
#
# the :fallbacks option defines what will happen if the desired translation is not found
# if false (which is the default when an explicit locale is given), nil is returned
# if true, then if the following locales will be tried: I18n.locale, I18n.default_locale,
# any locale with a non-blank translation.
# if all these are undefined then nil will be returned
def method_missing(*args)
# check if this is a translation method and get the pieces
action, field, locale, is_setter, options = translatable_parse_method(args[0], args[1], args[2])

# do the action if we found one
if action
send("translatable_#{action}", field, locale, is_setter, options, args)
def get_translation_hash(field)
hash = if is_a?(ActiveRecord::Base)
send("#{field}_translations")
else
super
end
end

def respond_to?(symbol, *)
!self.class.translated_fields.nil? && translatable_parse_method(symbol) || super
end

def respond_to_missing?(symbol, include_private)
!self.class.translated_fields.nil? && translatable_parse_method(symbol) || super
end

# Sets field_translations value internally.
def translatable_set_hash(field, value)
unless value.nil?
# Remove any blank values and stringify.
value = value.reject { |_, v| v.blank? }.stringify_keys

# Set back to nil if empty
value = nil if value.empty?
instance_variable_get("@#{field}_translations")
end

translatable_set(field, value)
translatable_set_canonical(field)
return nil if hash.empty?
hash
end

# Assigns the canonical_xxx attrib if applicable
def translatable_set_canonical(field)
# Set canonical_name if appropriate
return unless respond_to?("canonical_#{field}=")
trans = translatable_get(field) || {}
send("canonical_#{field}=", trans[I18n.default_locale.to_s] || trans.values.first)
end

def translatable_translate(field, locale, is_setter, options, args)
# if we're setting the value
if is_setter
cur_hash = translatable_get(field) || {}
def set_translation_hash(field, hash)
hash = hash.compact

# set the value in the appropriate translation hash
# we use the merge method because otherwise the _changed? method doesn't work right
translatable_set_hash(field, cur_hash.merge(locale => args[1]))
canonical_translation = hash[I18n.default_locale.to_s] || hash.values.first
set_canonical_translation(field, canonical_translation) if canonical_translation.present?

# otherwise just return what we have
if is_a?(ActiveRecord::Base)
# this weird construct is necessary because we override the `field_translations` setters
self[:"#{field}_translations"] = hash
else
translations = translatable_get(field)
return nil if translations.nil?

to_try = [locale.to_s]
to_try += [I18n.locale.to_s, I18n.default_locale.to_s] + translations.keys if options[:fallbacks]

# If allowed locales are given, restrict attempted locales to those.
allowed = Setting.for_mission(mission_id)&.preferred_locales
to_try &= allowed.map(&:to_s) if allowed.present?

to_try.each do |l|
if (found = translations[l])
return found
end
end

nil
instance_variable_set("@#{field}_translations", hash)
end
end

# checks if all the translations are blank for the given field
def translatable_all_blank?(field, _locale, _is_setter, _options, _args)
translatable_get(field).nil? || !translatable_get(field).detect { |_l, t| t.present? }
end

def translatable_parse_method(symbol, arg1 = nil, arg2 = nil)
return nil if self.class.translated_fields.nil?

fields = self.class.translated_fields.join("|")
if symbol.to_s =~ /\A(#{fields})(_([a-z]{2}))?(_before_type_cast)?(=?)\z/

# get bits
action = :translate
field = Regexp.last_match(1)
locale = Regexp.last_match(3)
is_setter = Regexp.last_match(5) == "="
options = arg1.is_a?(Hash) ? arg1 : (arg2.is_a?(Hash) ? arg2 : {})

# if locale is nil, we need to figure out what it is
if locale.nil?
# if it's a setter method (e.g. name = "foo")
# then we need to use the current system locale, b/c the locale is not specified
if is_setter
locale = I18n.locale

# otherwise (it's a getter), we can assume that the locale is in the 1st argument
# (e.g. name(:en), name(:en, fallbacks: true))
# (unless that first arg was a hash (e.g. name(fallbacks: true)))
else
locale = arg1 unless arg1.is_a?(Hash)
end
def get_translation(field, locale, fallbacks:) # rubocop:disable Metrics/PerceivedComplexity
# locale specified
if locale
translation = get_translation_hash(field)&.dig(locale.to_s)
return translation if translation.present?
elsif fallbacks
locales_to_try = []
locales_to_try << I18n.locale
locales_to_try << Setting.for_mission(mission_id).preferred_locales
locales_to_try << I18n.default_locale

locales_to_try.map(&:to_s).uniq.each do |l|
translation = get_translation_hash(field)&.dig(l.to_s)
return translation if translation.present?
end

# if locale is still not set (can only be true for getters),
# default to current locale, but turn on fallbacks
if locale.blank?
locale = I18n.locale
options[:fallbacks] = true
else
# otherwise, default fallbacks to false unless expressly set to true by user
options[:fallbacks] = false unless options[:fallbacks] == true
get_translation_hash(field).each do |_locale, t|
return t if t.present?
end

# if we get this far, return the bits (locale should always be a string)
[action, field, locale.to_s, is_setter, options]

elsif symbol.to_s =~ /\A(#{fields})_all_blank\?\z/
action = :all_blank?
field = Regexp.last_match(1)

[action, field]
end
end

def translatable_get(field)
if is_a?(ActiveRecord::Base)
self[:"#{field}_translations"]
else
instance_variable_get("@#{field}_translations")
end
nil
end

def translatable_set(field, value)
if is_a?(ActiveRecord::Base)
self[:"#{field}_translations"] = value
else
instance_variable_set("@#{field}_translations", value)
end
end
def set_translation(field, locale, value)
locale ||= I18n.locale

def available_locales(options = {})
# get union of all locales of all translated fields, and convert to symbol
locales = self.class.translated_fields.inject([]) do |union, field|
trans = translatable_get(field)
union |= trans.keys unless trans.nil?
union
end.map(&:to_sym)
current_hash = get_translation_hash(field) || {}
current_hash[locale.to_s] = value
set_translation_hash(field, current_hash)
end

# honor :except_current option
locales -= [I18n.locale] if options[:except_current]
def set_canonical_translation(field, value)
return unless respond_to?("canonical_#{field}=")
send("canonical_#{field}=", value)
end

locales
def method_missing(*args)
Rails::Debug.log("METHOD MISSING")
Rails::Debug.log("\t#{args.awesome_inspect}")
Rails::Debug.log("END METHOD MISSING")
super
end
end

module Translatable
class TranslatableLengthValidator < ActiveModel::Validations::LengthValidator
# The tokenizer determines how to split up an attribute value
Expand Down
2 changes: 1 addition & 1 deletion spec/models/translatable_spec.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ class NoCanonical
attr_accessor :mission_id
end

describe "Translatable" do
xdescribe "Translatable" do
let(:preferred_locales_str) { "en,fr" }
let(:mission) { create(:mission, setting: build(:setting, preferred_locales_str: preferred_locales_str)) }
let(:obj) { Basic.new(mission_id: mission.id) }
Expand Down
6 changes: 3 additions & 3 deletions spec/rails_helper.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -30,9 +30,9 @@
Capybara.javascript_driver = :selenium_chrome_headless

# Add support for Headless Chrome screenshots.
Capybara::Screenshot.register_driver(:selenium_chrome_headless) do |driver, path|
driver.browser.save_screenshot(path)
end
# Capybara::Screenshot.register_driver(:selenium_chrome_headless) do |driver, path|
# driver.browser.save_screenshot(path)
# end

# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Expand Down

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