adopt-a-hydrant/app/controllers/application_controller.rb

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class ApplicationController < ActionController::Base
protect_from_forgery
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before_filter :set_flash_from_params
before_filter :set_locale
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protected
def set_flash_from_params
if params[:flash]
params[:flash].each do |key, message|
flash.now[key.to_sym] = message
end
end
end
def set_locale
available_languages = Dir.glob(Rails.root + "config/locales/??.yml").map do |file|
File.basename(file, ".yml")
end
I18n.locale = request.compatible_language_from(available_languages) || I18n.default_locale
end
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end