184 lines
6.4 KiB
PHP
184 lines
6.4 KiB
PHP
<?php
|
|
/*
|
|
* Name: Language Filter
|
|
* Version: 0.1
|
|
* Description: Filters out postings in languages not spoken by the users
|
|
* Author: Tobias Diekershoff <https://f.diekershoff.de/u/tobias>
|
|
* License: MIT
|
|
*/
|
|
|
|
use Friendica\App;
|
|
use Friendica\Core\Addon;
|
|
use Friendica\Core\L10n;
|
|
use Friendica\Core\PConfig;
|
|
|
|
/* Define the hooks we want to use
|
|
* that is, we have settings, we need to save the settings and we want
|
|
* to modify the content of a posting when friendica prepares it.
|
|
*/
|
|
|
|
function langfilter_install()
|
|
{
|
|
Addon::registerHook('content_filter', 'addon/langfilter/langfilter.php', 'langfilter_content_filter', 10);
|
|
Addon::registerHook('addon_settings', 'addon/langfilter/langfilter.php', 'langfilter_addon_settings');
|
|
Addon::registerHook('addon_settings_post', 'addon/langfilter/langfilter.php', 'langfilter_addon_settings_post');
|
|
}
|
|
|
|
function langfilter_uninstall()
|
|
{
|
|
Addon::unregisterHook('content_filter', 'addon/langfilter/langfilter.php', 'langfilter_content_filter');
|
|
Addon::unregisterHook('prepare_body', 'addon/langfilter/langfilter.php', 'langfilter_prepare_body');
|
|
Addon::unregisterHook('addon_settings', 'addon/langfilter/langfilter.php', 'langfilter_addon_settings');
|
|
Addon::unregisterHook('addon_settings_post', 'addon/langfilter/langfilter.php', 'langfilter_addon_settings_post');
|
|
}
|
|
|
|
/* The settings
|
|
* 1st check if somebody logged in is calling
|
|
* 2nd get the current settings
|
|
* 3rd parse a SMARTY3 template, replacing some translateable strings for the form
|
|
*/
|
|
|
|
function langfilter_addon_settings(App $a, &$s)
|
|
{
|
|
if (!local_user()) {
|
|
return;
|
|
}
|
|
|
|
$enable_checked = (intval(PConfig::get(local_user(), 'langfilter', 'disable')) ? '' : ' checked="checked" ');
|
|
$languages = PConfig::get(local_user(), 'langfilter', 'languages');
|
|
$minconfidence = PConfig::get(local_user(), 'langfilter', 'minconfidence') * 100;
|
|
$minlength = PConfig::get(local_user(), 'langfilter', 'minlength');
|
|
|
|
if (!$languages) {
|
|
$languages = 'en,de,fr,it,es';
|
|
}
|
|
|
|
$t = get_markup_template("settings.tpl", "addon/langfilter/");
|
|
$s .= replace_macros($t, [
|
|
'$title' => L10n::t("Language Filter"),
|
|
'$intro' => L10n::t('This addon tries to identify the language posts are writen in. If it does not match any language specifed below, posts will be hidden by collapsing them.'),
|
|
'$enabled' => ['langfilter_enable', L10n::t('Use the language filter'), $enable_checked, ''],
|
|
'$languages' => ['langfilter_languages', L10n::t('Able to read'), $languages, L10n::t('List of abbreviations (iso2 codes) for languages you speak, comma separated. For example "de,it".')],
|
|
'$minconfidence' => ['langfilter_minconfidence', L10n::t('Minimum confidence in language detection'), $minconfidence, L10n::t('Minimum confidence in language detection being correct, from 0 to 100. Posts will not be filtered when the confidence of language detection is below this percent value.')],
|
|
'$minlength' => ['langfilter_minlength', L10n::t('Minimum length of message body'), $minlength, L10n::t('Minimum number of characters in message body for filter to be used. Posts shorter than this will not be filtered. Note: Language detection is unreliable for short content (<200 characters).')],
|
|
'$submit' => L10n::t('Save Settings'),
|
|
]);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Save the settings
|
|
* 1st check it's a logged in user calling
|
|
* 2nd check the langfilter form is to be saved
|
|
* 3rd save the settings to the DB for later usage
|
|
*/
|
|
|
|
function langfilter_addon_settings_post(App $a, &$b)
|
|
{
|
|
if (!local_user()) {
|
|
return;
|
|
}
|
|
|
|
if ($_POST['langfilter-settings-submit']) {
|
|
PConfig::set(local_user(), 'langfilter', 'languages', trim($_POST['langfilter_languages']));
|
|
$enable = ((x($_POST, 'langfilter_enable')) ? intval($_POST['langfilter_enable']) : 0);
|
|
$disable = 1 - $enable;
|
|
PConfig::set(local_user(), 'langfilter', 'disable', $disable);
|
|
$minconfidence = 0 + $_POST['langfilter_minconfidence'];
|
|
if (!$minconfidence) {
|
|
$minconfidence = 0;
|
|
} elseif ($minconfidence < 0) {
|
|
$minconfidence = 0;
|
|
} elseif ($minconfidence > 100) {
|
|
$minconfidence = 100;
|
|
}
|
|
PConfig::set(local_user(), 'langfilter', 'minconfidence', $minconfidence / 100.0);
|
|
|
|
$minlength = 0 + $_POST['langfilter_minlength'];
|
|
if (!$minlength) {
|
|
$minlength = 32;
|
|
} elseif ($minlengt8h < 0) {
|
|
$minlength = 32;
|
|
}
|
|
PConfig::set(local_user(), 'langfilter', 'minlength', $minlength);
|
|
|
|
info(L10n::t('Language Filter Settings saved.') . EOL);
|
|
}
|
|
}
|
|
|
|
/* Actually filter postings by their language
|
|
* 1st check if the user wants to filter postings
|
|
* 2nd get the user settings which languages shall be not filtered out
|
|
* 3rd extract the language of a posting
|
|
* 4th if the determined language does not fit to the spoken languages
|
|
* of the user, then collapse the posting, but provide a link to
|
|
* expand it again.
|
|
*/
|
|
|
|
function langfilter_content_filter(App $a, &$hook_data)
|
|
{
|
|
$logged_user = local_user();
|
|
if (!$logged_user) {
|
|
return;
|
|
}
|
|
|
|
// Never filter own messages
|
|
// TODO: find a better way to extract this
|
|
$logged_user_profile = $a->get_baseurl() . '/profile/' . $a->user['nickname'];
|
|
if ($logged_user_profile == $hook_data['item']['author-link']) {
|
|
return;
|
|
}
|
|
|
|
// Don't filter if language filter is disabled
|
|
if (PConfig::get($logged_user, 'langfilter', 'disable')) {
|
|
return;
|
|
}
|
|
|
|
// Don't filter if body lenght is below minimum
|
|
$minlen = PConfig::get(local_user(), 'langfilter', 'minlength');
|
|
if (!$minlen) {
|
|
$minlen = 32;
|
|
}
|
|
if (strlen($hook_data['item']['body']) < $minlen) {
|
|
return;
|
|
}
|
|
|
|
$read_languages_string = PConfig::get(local_user(), 'langfilter', 'languages');
|
|
$minconfidence = PConfig::get(local_user(), 'langfilter', 'minconfidence');
|
|
|
|
// Don't filter if no spoken languages are configured
|
|
if (!$read_languages_string) {
|
|
return;
|
|
}
|
|
$read_languages_array = explode(',', $read_languages_string);
|
|
|
|
// Extract the language of the post
|
|
$opts = $hook_data['item']['postopts'];
|
|
if (!$opts) {
|
|
// no options associated to post
|
|
return;
|
|
}
|
|
|
|
if (!preg_match('/\blang=([^;]*);([^:]*)/', $opts, $matches)) {
|
|
// no lang options associated to post
|
|
return;
|
|
}
|
|
|
|
$lang = $matches[1];
|
|
$confidence = $matches[2];
|
|
|
|
// Do not filter if language detection confidence is too low
|
|
if ($minconfidence && $confidence < $minconfidence) {
|
|
return;
|
|
}
|
|
|
|
$iso2 = Text_LanguageDetect_ISO639::nameToCode2($lang);
|
|
|
|
if (!$iso2) {
|
|
return;
|
|
}
|
|
|
|
if (!in_array($iso2, $read_languages_array)) {
|
|
$hook_data['filter_reasons'][] = L10n::t('Filtered language: %s', ucfirst($lang));
|
|
}
|
|
}
|