+use Friendica\Core\Hook;
+use Friendica\DI;
+
+function nsfw_install()
+{
+ Hook::register('prepare_body_content_filter', 'addon/nsfw/nsfw.php', 'nsfw_prepare_body_content_filter', 10);
+ Hook::register('addon_settings', 'addon/nsfw/nsfw.php', 'nsfw_addon_settings');
+ Hook::register('addon_settings_post', 'addon/nsfw/nsfw.php', 'nsfw_addon_settings_post');
+}
+
+// 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
+// check against the rest of the body.
+
+function nsfw_extract_photos($body)
+{
+ $new_body = '';
+
+ $img_start = strpos($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);
+
+ $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 $new_body;
+}
+
+function nsfw_addon_settings(&$a, &$s)
+{
+ if (!local_user()) {
+ return;
+ }
+
+ /* Add our stylesheet to the page so we can make our settings look nice */
+
+ DI::page()['htmlhead'] .= '<link rel="stylesheet" type="text/css" href="' . DI::baseUrl()->get() . '/addon/nsfw/nsfw.css' . '" media="all" />' . "\r\n";
+
+ $enable_checked = (intval(DI::pConfig()->get(local_user(), 'nsfw', 'disable')) ? '' : ' checked="checked" ');
+ $words = DI::pConfig()->get(local_user(), 'nsfw', 'words');
+ if (!$words) {
+ $words = 'nsfw,';
+ }