Remove automatic language detection.

master
multiple creatures 2019-05-07 22:38:43 -05:00
parent 6c374b5153
commit dca70079b1
7 changed files with 3 additions and 248 deletions

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@ -30,7 +30,6 @@ gem 'browser'
gem 'charlock_holmes', '~> 0.7.6'
gem 'iso-639'
gem 'chewy', '~> 5.0'
gem 'cld3', '~> 3.2.4'
gem 'devise', '~> 4.6'
gem 'devise-two-factor', '~> 3.0'

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@ -146,8 +146,6 @@ GEM
elasticsearch (>= 2.0.0)
elasticsearch-dsl
chunky_png (1.3.10)
cld3 (3.2.4)
ffi (>= 1.1.0, < 1.11.0)
climate_control (0.2.0)
cocaine (0.5.8)
climate_control (>= 0.0.3, < 1.0)
@ -382,10 +380,6 @@ GEM
omniauth (~> 1.3, >= 1.3.2)
ruby-saml (~> 1.7)
orm_adapter (0.5.0)
ostatus2 (2.0.3)
addressable (~> 2.5)
http (~> 3.0)
nokogiri (~> 1.8)
ox (2.10.0)
paperclip (6.0.0)
activemodel (>= 4.2.0)
@ -673,6 +667,7 @@ DEPENDENCIES
brakeman (~> 4.5)
browser
bullet (~> 6.0)
bundler (~> 1.17)
bundler-audit (~> 0.6)
capistrano (~> 3.11)
capistrano-rails (~> 1.4)
@ -681,7 +676,6 @@ DEPENDENCIES
capybara (~> 3.20)
charlock_holmes (~> 0.7.6)
chewy (~> 5.0)
cld3 (~> 3.2.4)
climate_control (~> 0.2)
concurrent-ruby
derailed_benchmarks
@ -728,7 +722,6 @@ DEPENDENCIES
omniauth (~> 1.9)
omniauth-cas (~> 1.1)
omniauth-saml (~> 1.10)
ostatus2 (~> 2.0)
ox (~> 2.10)
paperclip (~> 6.0)
paperclip-av-transcoder (~> 0.6)

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@ -67,10 +67,6 @@ module SettingsHelper
HUMAN_LOCALES[locale]
end
def filterable_languages
LanguageDetector.instance.language_names.select(&HUMAN_LOCALES.method(:key?))
end
def hash_to_object(hash)
HashObject.new(hash)
end

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@ -338,7 +338,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
elsif summary_language_map?
@object['summaryMap'].keys.first
elsif supported_object_type?
LanguageDetector.instance.detect(text_from_content, @account)
nil
end
end

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@ -1,99 +0,0 @@
# frozen_string_literal: true
class LanguageDetector
include Singleton
WORDS_THRESHOLD = 4
RELIABLE_CHARACTERS_RE = /[\p{Hebrew}\p{Arabic}\p{Syriac}\p{Thaana}\p{Nko}\p{Han}\p{Katakana}\p{Hiragana}\p{Hangul}]+/m
def initialize
@identifier = CLD3::NNetLanguageIdentifier.new(1, 2048)
end
def detect(text, account)
input_text = prepare_text(text)
return if input_text.blank?
detect_language_code(input_text) || default_locale(account)
end
def language_names
@language_names = CLD3::TaskContextParams::LANGUAGE_NAMES.map { |name| iso6391(name.to_s).to_sym }.uniq
end
private
def prepare_text(text)
simplify_text(text).strip
end
def unreliable_input?(text)
!reliable_input?(text)
end
def reliable_input?(text)
sufficient_text_length?(text) || language_specific_character_set?(text)
end
def sufficient_text_length?(text)
text.split(/\s+/).size >= WORDS_THRESHOLD
end
def language_specific_character_set?(text)
words = text.scan(RELIABLE_CHARACTERS_RE)
if words.present?
words.reduce(0) { |acc, elem| acc + elem.size }.to_f / text.size.to_f > 0.3
else
false
end
end
def detect_language_code(text)
return if unreliable_input?(text)
result = @identifier.find_language(text)
iso6391(result.language.to_s).to_sym if result.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 simplify_text(text)
new_text = remove_html(text)
new_text.gsub!(FetchLinkCardService::URL_PATTERN, '')
new_text.gsub!(Account::MENTION_RE, '')
new_text.gsub!(Tag::HASHTAG_RE, '')
new_text.gsub!(/:#{CustomEmoji::SHORTCODE_RE_FRAGMENT}:/, '')
new_text.gsub!(/\s+/, ' ')
new_text
end
def new_scrubber
scrubber = Rails::Html::PermitScrubber.new
scrubber.tags = %w(br p)
scrubber
end
def scrubber
@scrubber ||= new_scrubber
end
def remove_html(text)
text = Loofah.fragment(text).scrub!(scrubber).to_s
text.gsub!('<br>', "\n")
text.gsub!('</p><p>', "\n\n")
text.gsub!(/(^<p>|<\/p>$)/, '')
text
end
def default_locale(account)
account.user_locale&.to_sym || I18n.default_locale if account.local?
end
end

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@ -176,7 +176,7 @@ class PostStatusService < BaseService
spoiler_text: @options[:spoiler_text] || '',
visibility: @visibility,
sharekey: @sharekey,
language: language_from_option(@options[:language]) || @account.user&.setting_default_language&.presence || LanguageDetector.instance.detect(@text, @account),
language: language_from_option(@options[:language]) || @account.user&.setting_default_language&.presence || nil,
application: @options[:application],
content_type: @options[:content_type] || @account.user&.setting_default_content_type,
}.compact

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@ -1,134 +0,0 @@
# frozen_string_literal: true
require 'rails_helper'
describe LanguageDetector do
describe 'prepare_text' do
it 'returns unmodified string without special cases' do
string = 'just a regular string'
result = described_class.instance.send(:prepare_text, string)
expect(result).to eq string
end
it 'collapses spacing in strings' do
string = 'The formatting in this is very odd'
result = described_class.instance.send(:prepare_text, string)
expect(result).to eq 'The formatting in this is very odd'
end
it 'strips usernames from strings before detection' do
string = '@username Yeah, very surreal...! also @friend'
result = described_class.instance.send(:prepare_text, string)
expect(result).to eq 'Yeah, very surreal...! also'
end
it 'strips URLs from strings before detection' do
string = 'Our website is https://example.com and also http://localhost.dev'
result = described_class.instance.send(:prepare_text, string)
expect(result).to eq 'Our website is and also'
end
it 'strips #hashtags from strings before detection' do
string = 'Hey look at all the #animals and #fish'
result = described_class.instance.send(:prepare_text, string)
expect(result).to eq 'Hey look at all the and'
end
end
describe 'detect' do
let(:account_without_user_locale) { Fabricate(:user, locale: nil).account }
let(:account_remote) { Fabricate(:account, domain: 'joinmastodon.org') }
it 'detects english language for basic strings' do
strings = [
"Hello and welcome to mastodon how are you today?",
"I'd rather not!",
"a lot of people just want to feel righteous all the time and that's all that matters",
]
strings.each do |string|
result = described_class.instance.detect(string, account_without_user_locale)
expect(result).to eq(:en), string
end
end
it 'detects spanish language' do
string = 'Obtener un Hola y bienvenidos a Mastodon. Obtener un Hola y bienvenidos a Mastodon. Obtener un Hola y bienvenidos a Mastodon. Obtener un Hola y bienvenidos a Mastodon'
result = described_class.instance.detect(string, account_without_user_locale)
expect(result).to eq :es
end
describe 'when language can\'t be detected' do
it 'uses nil when sent an empty document' do
result = described_class.instance.detect('', account_without_user_locale)
expect(result).to eq nil
end
describe 'because of a URL' do
it 'uses nil when sent just a URL' do
string = 'http://example.com/media/2kFTgOJLXhQf0g2nKB4'
cld_result = CLD3::NNetLanguageIdentifier.new(0, 2048).find_language(string)
expect(cld_result).not_to eq :en
result = described_class.instance.detect(string, account_without_user_locale)
expect(result).to eq nil
end
end
describe 'with an account' do
it 'uses the account locale when present' do
account = double(user_locale: 'fr')
result = described_class.instance.detect('', account)
expect(result).to eq nil
end
it 'uses nil when account is present but has no locale' do
result = described_class.instance.detect('', account_without_user_locale)
expect(result).to eq nil
end
end
describe 'with an `en` default locale' do
it 'uses nil for undetectable string' do
result = described_class.instance.detect('', account_without_user_locale)
expect(result).to eq nil
end
end
describe 'remote user' do
it 'detects Korean language' do
string = '안녕하세요'
result = described_class.instance.detect(string, account_remote)
expect(result).to eq :ko
end
end
describe 'with a non-`en` default locale' do
around(:each) do |example|
before = I18n.default_locale
I18n.default_locale = :ja
example.run
I18n.default_locale = before
end
it 'uses nil for undetectable string' do
string = ''
result = described_class.instance.detect(string, account_without_user_locale)
expect(result).to eq nil
end
end
end
end
end