friendica-addons/nsfw/nsfw.php

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<?php
/**
* Name: NSFW
* Description: Collapse posts with inappropriate content
* Version: 1.0
* Author: Mike Macgirvin <http://macgirvin.com/profile/mike>
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*
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*/
use Friendica\Core\Addon;
use Friendica\Core\PConfig;
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function nsfw_install() {
Addon::registerHook('prepare_body', 'addon/nsfw/nsfw.php', 'nsfw_prepare_body', 10);
Addon::registerHook('addon_settings', 'addon/nsfw/nsfw.php', 'nsfw_addon_settings');
Addon::registerHook('addon_settings_post', 'addon/nsfw/nsfw.php', 'nsfw_addon_settings_post');
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}
function nsfw_uninstall() {
Addon::unregisterHook('prepare_body', 'addon/nsfw/nsfw.php', 'nsfw_prepare_body');
Addon::unregisterHook('addon_settings', 'addon/nsfw/nsfw.php', 'nsfw_addon_settings');
Addon::unregisterHook('addon_settings_post', 'addon/nsfw/nsfw.php', 'nsfw_addon_settings_post');
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}
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// This function isn't perfect and isn't trying to preserve the html structure - it's just a
// quick and dirty filter to pull out embedded photo blobs because 'nsfw' seems to come up
// inside them quite often. We don't need anything fancy, just pull out the data blob so we can
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// check against the rest of the body.
function nsfw_extract_photos($body) {
$new_body = '';
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$img_start = strpos($body,'src="data:');
$img_end = (($img_start !== false) ? strpos(substr($body,$img_start),'>') : false);
$cnt = 0;
while($img_end !== false) {
$img_end += $img_start;
$new_body = $new_body . substr($body,0,$img_start);
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$cnt ++;
$body = substr($body,0,$img_end);
$img_start = strpos($body,'src="data:');
$img_end = (($img_start !== false) ? strpos(substr($body,$img_start),'>') : false);
}
if(! $cnt)
return $body;
return $new_body;
}
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function nsfw_addon_settings(&$a,&$s) {
if(! local_user())
return;
/* Add our stylesheet to the page so we can make our settings look nice */
$a->page['htmlhead'] .= '<link rel="stylesheet" type="text/css" href="' . $a->get_baseurl() . '/addon/nsfw/nsfw.css' . '" media="all" />' . "\r\n";
$enable_checked = (intval(PConfig::get(local_user(),'nsfw','disable')) ? '' : ' checked="checked" ');
$words = PConfig::get(local_user(),'nsfw','words');
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if(! $words)
$words = 'nsfw,';
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$s .= '<span id="settings_nsfw_inflated" class="settings-block fakelink" style="display: block;" onclick="openClose(\'settings_nsfw_expanded\'); openClose(\'settings_nsfw_inflated\');">';
$s .= '<h3>' . t('Not Safe For Work (General Purpose Content Filter)') . '</h3>';
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$s .= '</span>';
$s .= '<div id="settings_nsfw_expanded" class="settings-block" style="display: none;">';
$s .= '<span class="fakelink" onclick="openClose(\'settings_nsfw_expanded\'); openClose(\'settings_nsfw_inflated\');">';
$s .= '<h3>' . t('Not Safe For Work (General Purpose Content Filter)') . '</h3>';
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$s .= '</span>';
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$s .= '<div id="nsfw-wrapper">';
$s .= '<p>' . t ('This addon looks in posts for the words/text you specify below, and collapses any content containing those keywords so it is not displayed at inappropriate times, such as sexual innuendo that may be improper in a work setting. It is polite and recommended to tag any content containing nudity with #NSFW. This filter can also match any other word/text you specify, and can thereby be used as a general purpose content filter.') . '</p>';
$s .= '<label id="nsfw-enable-label" for="nsfw-enable">' . t('Enable Content filter') . ' </label>';
$s .= '<input id="nsfw-enable" type="checkbox" name="nsfw-enable" value="1"' . $enable_checked . ' />';
$s .= '<div class="clear"></div>';
$s .= '<label id="nsfw-label" for="nsfw-words">' . t('Comma separated list of keywords to hide') . ' </label>';
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$s .= '<textarea id="nsfw-words" type="text" name="nsfw-words">' . $words .'</textarea>';
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$s .= '</div><div class="clear"></div>';
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$s .= '<div class="settings-submit-wrapper" ><input type="submit" id="nsfw-submit" name="nsfw-submit" class="settings-submit" value="' . t('Save Settings') . '" /></div>';
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$s .= '<div class="nsfw-desc">' . t('Use /expression/ to provide regular expressions') . '</div></div>';
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return;
}
function nsfw_addon_settings_post(&$a,&$b) {
if(! local_user())
return;
if($_POST['nsfw-submit']) {
PConfig::set(local_user(),'nsfw','words',trim($_POST['nsfw-words']));
$enable = ((x($_POST,'nsfw-enable')) ? intval($_POST['nsfw-enable']) : 0);
$disable = 1-$enable;
PConfig::set(local_user(),'nsfw','disable', $disable);
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info( t('NSFW Settings saved.') . EOL);
}
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}
function nsfw_prepare_body(&$a,&$b) {
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$words = null;
if(PConfig::get(local_user(),'nsfw','disable'))
return;
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if(local_user()) {
$words = PConfig::get(local_user(),'nsfw','words');
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}
if($words) {
$arr = explode(',',$words);
}
else {
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$arr = ['nsfw'];
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}
$found = false;
if(count($arr)) {
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$body = $b['item']['title'] . "\n" . nsfw_extract_photos($b['html']);
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foreach($arr as $word) {
$word = trim($word);
if(! strlen($word)) {
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continue;
}
if(strpos($word,'/') === 0) {
if(preg_match($word,$body)) {
$found = true;
break;
}
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}
else {
if(stristr($body,$word)) {
$found = true;
break;
}
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if(is_array($b['item']['tags']) && count($b['item']['tags'])) {
foreach($b['item']['tags'] as $t) {
if(stristr($t, '>' . $word . '<' )) {
$found = true;
break;
}
}
}
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}
}
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}
if($found) {
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$rnd = random_string(8);
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$b['html'] = '<div id="nsfw-wrap-' . $rnd . '" class="fakelink" onclick=openClose(\'nsfw-' . $rnd . '\'); >' . sprintf( t('%s - Click to open/close'),$word ) . '</div><div id="nsfw-' . $rnd . '" style="display: none; " >' . $b['html'] . '</div>';
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}
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}