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langfilter, initial commit

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This addon is based on the NSFW filter but collapses postings based on the
detected language instead of a list of words.

rel friendica#1778
This commit is contained in:
Tobias Diekershoff 2015-07-24 19:02:42 +02:00
parent 4876d31209
commit e47f3c5215
5 changed files with 245 additions and 0 deletions
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langfilter/langfilter.php Normal file
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<?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
*/
require_once('library/langdet/Text/LanguageDetect.php');
/* 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() {
register_hook('prepare_body', 'addon/langfilter/langfilter.php', 'langfilter_prepare_body', 10);
register_hook('plugin_settings', 'addon/langfilter/langfilter.php', 'langfilter_addon_settings');
register_hook('plugin_settings_post', 'addon/langfilter/langfilter.php', 'langfilter_addon_settings_post');
}
function langfilter_uninstall() {
unregister_hook('prepare_body', 'addon/langfilter/langfilter.php', 'langfilter_prepare_body');
unregister_hook('plugin_settings', 'addon/langfilter/langfilter.php', 'langfilter_addon_settings');
unregister_hook('plugin_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(&$a,&$s) {
if(! local_user())
return;
$enable_checked = (intval(get_pconfig(local_user(),'langfilter','disable')) ? '' : ' checked="checked" ');
$languages = get_pconfig(local_user(),'langfilter','languages');
if(! $languages)
$languages = 'en,de,fr,it,es';
$t = get_markup_template("settings.tpl", "addon/langfilter/" );
$s .= replace_macros ($t, array(
'$title' => t("Language Filter"),
'$intro' => t ('This addon tries to identify the language of a postings. If it does not match any language spoken by you (see below) the posting will be collapsed. Remember detecting the language is not perfect, especially with short postings.'),
'$enabled' => array('langfilter_enable', t('Use the language filter'), $enable_checked, ''),
'$regex' => t('Use /expression/ to provide regular expressions'),
'$languages' => array('langfilter_languages', t('I speak'), $languages, t('List of abbreviations for languages you speak, comma seperated. For excample "de,it".') ),
'$submit' => 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(&$a,&$b) {
if(! local_user())
return;
if($_POST['langfilter-settings-submit']) {
set_pconfig(local_user(),'langfilter','languages',trim($_POST['langfilter_languages']));
$enable = ((x($_POST,'langfilter_enable')) ? intval($_POST['langfilter_enable']) : 0);
$disable = 1-$enable;
set_pconfig(local_user(),'langfilter','disable', $disable);
info( t('Language Filter Settings saved.') . EOL);
}
}
/* Actually filter postings by their language
* 1st check if the user wants to filter postings
* 2nd get the user settings which languages shall be not filtered out
* 3rd determine the language of a posting
* 4th if the determined language does not fit to the spoken languages
* of the user, then collapse the posting, but provide a link to
* expand it again.
*/
function langfilter_prepare_body(&$a,&$b) {
if(get_pconfig(local_user(),'langfilter','disable'))
return;
if(local_user()) {
$langs = get_pconfig(local_user(),'langfilter','languages');
}
if($langs) {
$arr = explode(',',$langs);
} else {
return;
}
$found = false;
$l = new Text_LanguageDetect;
$l->_name_mode = 2; // two letter codes
$l->_threshold = 600; // make it a bit harder to be confident with a lng
// IOW make it more possible that lng is correct
$lng = $l->detectSimple($b['html']);
if ($lng==null)
return;
if (! in_array($lng, $arr))
$found = true;
if ($lng==null)
$found = false;
if($found) {
$rnd = random_string(8);
$b['html'] = '<div id="langfilter-wrap-' . $rnd . '" class="fakelink" onclick=openClose(\'langfilter-' . $rnd . '\'); >' . sprintf( t('unspoken language %s - Click to open/close'),$lng ) . '</div><div id="langfilter-' . $rnd . '" style="display: none; " >' . $b['html'] . '</div>';
}
}
?>