You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.1 KiB
55 lines
1.1 KiB
# frozen_string_literal: true
|
|
|
|
class LanguageDetector
|
|
attr_reader :text, :account
|
|
|
|
def initialize(text, account = nil)
|
|
@text = text
|
|
@account = account
|
|
@identifier = CLD3::NNetLanguageIdentifier.new(1, 2048)
|
|
end
|
|
|
|
def to_iso_s
|
|
detected_language_code || default_locale
|
|
end
|
|
|
|
def prepared_text
|
|
simplified_text.strip
|
|
end
|
|
|
|
private
|
|
|
|
def detected_language_code
|
|
iso6391(result.language).to_sym if detected_language_reliable?
|
|
end
|
|
|
|
def iso6391(bcp47)
|
|
iso639 = bcp47.split('-').first
|
|
|
|
# CLD3 returns grandfathered language code for Hebrew
|
|
return 'he' if iso639 == 'iw'
|
|
|
|
ISO_639.find(iso639).alpha2
|
|
end
|
|
|
|
def result
|
|
@result ||= @identifier.find_language(prepared_text)
|
|
end
|
|
|
|
def detected_language_reliable?
|
|
result.reliable?
|
|
end
|
|
|
|
def simplified_text
|
|
text.dup.tap do |new_text|
|
|
new_text.gsub!(FetchLinkCardService::URL_PATTERN, '')
|
|
new_text.gsub!(Account::MENTION_RE, '')
|
|
new_text.gsub!(Tag::HASHTAG_RE, '')
|
|
new_text.gsub!(/\s+/, ' ')
|
|
end
|
|
end
|
|
|
|
def default_locale
|
|
account&.user_locale&.to_sym || nil
|
|
end
|
|
end
|
|
|