Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file src/Content/Text/BBCode.php
*/
namespace Friendica\Content\Text;
use Friendica\App;
use Friendica\Content\Text\Plaintext;
use Friendica\Core\Config;
use Friendica\Core\L10n;
use Friendica\Core\PConfig;
use Friendica\Core\System;
use Friendica\Object\Image;
use Friendica\Util\ParseUrl;
use Friendica\Util\Network;
require_once "include/bbcode.php";
require_once "include/html2plain.php";
class BBCode
{
/**
* @brief Fetches attachment data that were generated the old way
*
* @param string $body Message body
* @return array
* 'type' -> Message type ("link", "video", "photo")
* 'text' -> Text before the shared message
* 'after' -> Text after the shared message
* 'image' -> Preview image of the message
* 'url' -> Url to the attached message
* 'title' -> Title of the attachment
* 'description' -> Description of the attachment
*/
private static function getOldAttachmentData($body)
{
$post = [];
// Simplify image codes
$body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
if (preg_match_all("(\[class=(.*?)\](.*?)\[\/class\])ism", $body, $attached, PREG_SET_ORDER)) {
foreach ($attached as $data) {
if (!in_array($data[1], ["type-link", "type-video", "type-photo"])) {
continue;
}
$post["type"] = substr($data[1], 5);
$pos = strpos($body, $data[0]);
if ($pos > 0) {
$post["text"] = trim(substr($body, 0, $pos));
$post["after"] = trim(substr($body, $pos + strlen($data[0])));
} else {
$post["text"] = trim(str_replace($data[0], "", $body));
}
$attacheddata = $data[2];
$URLSearchString = "^\[\]";
if (preg_match("/\[img\]([$URLSearchString]*)\[\/img\]/ism", $attacheddata, $matches)) {
$picturedata = Image::getInfoFromURL($matches[1]);
if (($picturedata[0] >= 500) && ($picturedata[0] >= $picturedata[1])) {
$post["image"] = $matches[1];
} else {
$post["preview"] = $matches[1];
}
}
if (preg_match("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism", $attacheddata, $matches)) {
$post["url"] = $matches[1];
$post["title"] = $matches[2];
}
if (($post["url"] == "") && (in_array($post["type"], ["link", "video"]))
&& preg_match("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) {
$post["url"] = $matches[1];
}
// Search for description
if (preg_match("/\[quote\](.*?)\[\/quote\]/ism", $attacheddata, $matches)) {
$post["description"] = $matches[1];
}
}
}
return $post;
}
/**
* @brief Fetches attachment data that were generated with the "attachment" element
*
* @param string $body Message body
* @return array
* 'type' -> Message type ("link", "video", "photo")
* 'text' -> Text before the shared message
* 'after' -> Text after the shared message
* 'image' -> Preview image of the message
* 'url' -> Url to the attached message
* 'title' -> Title of the attachment
* 'description' -> Description of the attachment
*/
public static function getAttachmentData($body)
{
$data = [];
if (!preg_match("/(.*)\[attachment(.*?)\](.*?)\[\/attachment\](.*)/ism", $body, $match)) {
return self::getOldAttachmentData($body);
}
$attributes = $match[2];
$data["text"] = trim($match[1]);
$type = "";
preg_match("/type='(.*?)'/ism", $attributes, $matches);
if (x($matches, 1)) {
$type = strtolower($matches[1]);
}
preg_match('/type="(.*?)"/ism', $attributes, $matches);
if (x($matches, 1)) {
$type = strtolower($matches[1]);
}
if ($type == "") {
return [];
}
if (!in_array($type, ["link", "audio", "photo", "video"])) {
return [];
}
if ($type != "") {
$data["type"] = $type;
}
$url = "";
preg_match("/url='(.*?)'/ism", $attributes, $matches);
if (x($matches, 1)) {
$url = $matches[1];
}
preg_match('/url="(.*?)"/ism', $attributes, $matches);
if (x($matches, 1)) {
$url = $matches[1];
}
if ($url != "") {
$data["url"] = html_entity_decode($url, ENT_QUOTES, 'UTF-8');
}
$title = "";
preg_match("/title='(.*?)'/ism", $attributes, $matches);
if (x($matches, 1)) {
$title = $matches[1];
}
preg_match('/title="(.*?)"/ism', $attributes, $matches);
if (x($matches, 1)) {
$title = $matches[1];
}
if ($title != "") {
$title = bbcode(html_entity_decode($title, ENT_QUOTES, 'UTF-8'), false, false, true);
$title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
$title = str_replace(["[", "]"], ["&#91;", "&#93;"], $title);
$data["title"] = $title;
}
$image = "";
preg_match("/image='(.*?)'/ism", $attributes, $matches);
if (x($matches, 1)) {
$image = $matches[1];
}
preg_match('/image="(.*?)"/ism', $attributes, $matches);
if (x($matches, 1)) {
$image = $matches[1];
}
if ($image != "") {
$data["image"] = html_entity_decode($image, ENT_QUOTES, 'UTF-8');
}
$preview = "";
preg_match("/preview='(.*?)'/ism", $attributes, $matches);
if (x($matches, 1)) {
$preview = $matches[1];
}
preg_match('/preview="(.*?)"/ism', $attributes, $matches);
if (x($matches, 1)) {
$preview = $matches[1];
}
if ($preview != "") {
$data["preview"] = html_entity_decode($preview, ENT_QUOTES, 'UTF-8');
}
$data["description"] = trim($match[3]);
$data["after"] = trim($match[4]);
return $data;
}
public static function getAttachedData($body, $item = [])
{
/*
- text:
- type: link, video, photo
- title:
- url:
- image:
- description:
- (thumbnail)
*/
$has_title = !empty($item['title']);
$plink = (!empty($item['plink']) ? $item['plink'] : '');
$post = self::getAttachmentData($body);
// if nothing is found, it maybe having an image.
if (!isset($post["type"])) {
// Simplify image codes
$body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
$URLSearchString = "^\[\]";
if (preg_match_all("(\[url=([$URLSearchString]*)\]\s*\[img\]([$URLSearchString]*)\[\/img\]\s*\[\/url\])ism", $body, $pictures, PREG_SET_ORDER)) {
if ((count($pictures) == 1) && !$has_title) {
// Checking, if the link goes to a picture
$data = ParseUrl::getSiteinfoCached($pictures[0][1], true);
// Workaround:
// Sometimes photo posts to the own album are not detected at the start.
// So we seem to cannot use the cache for these cases. That's strange.
if (($data["type"] != "photo") && strstr($pictures[0][1], "/photos/")) {
$data = ParseUrl::getSiteinfo($pictures[0][1], true);
}
if ($data["type"] == "photo") {
$post["type"] = "photo";
if (isset($data["images"][0])) {
$post["image"] = $data["images"][0]["src"];
$post["url"] = $data["url"];
} else {
$post["image"] = $data["url"];
}
$post["preview"] = $pictures[0][2];
$post["text"] = str_replace($pictures[0][0], "", $body);
} else {
$imgdata = Image::getInfoFromURL($pictures[0][1]);
if (substr($imgdata["mime"], 0, 6) == "image/") {
$post["type"] = "photo";
$post["image"] = $pictures[0][1];
$post["preview"] = $pictures[0][2];
$post["text"] = str_replace($pictures[0][0], "", $body);
}
}
} elseif (count($pictures) > 0) {
$post["type"] = "link";
$post["url"] = $plink;
$post["image"] = $pictures[0][2];
$post["text"] = $body;
}
} elseif (preg_match_all("(\[img\]([$URLSearchString]*)\[\/img\])ism", $body, $pictures, PREG_SET_ORDER)) {
if ((count($pictures) == 1) && !$has_title) {
$post["type"] = "photo";
$post["image"] = $pictures[0][1];
$post["text"] = str_replace($pictures[0][0], "", $body);
} elseif (count($pictures) > 0) {
$post["type"] = "link";
$post["url"] = $plink;
$post["image"] = $pictures[0][1];
$post["text"] = $body;
}
}
// Test for the external links
preg_match_all("(\[url\]([$URLSearchString]*)\[\/url\])ism", $body, $links1, PREG_SET_ORDER);
preg_match_all("(\[url\=([$URLSearchString]*)\].*?\[\/url\])ism", $body, $links2, PREG_SET_ORDER);
$links = array_merge($links1, $links2);
// If there is only a single one, then use it.
// This should cover link posts via API.
if ((count($links) == 1) && !isset($post["preview"]) && !$has_title) {
$post["type"] = "link";
$post["text"] = trim($body);
$post["url"] = $links[0][1];
}
// Now count the number of external media links
preg_match_all("(\[vimeo\](.*?)\[\/vimeo\])ism", $body, $links1, PREG_SET_ORDER);
preg_match_all("(\[youtube\\](.*?)\[\/youtube\\])ism", $body, $links2, PREG_SET_ORDER);
preg_match_all("(\[video\\](.*?)\[\/video\\])ism", $body, $links3, PREG_SET_ORDER);
preg_match_all("(\[audio\\](.*?)\[\/audio\\])ism", $body, $links4, PREG_SET_ORDER);
// Add them to the other external links
$links = array_merge($links, $links1, $links2, $links3, $links4);
// Are there more than one?
if (count($links) > 1) {
// The post will be the type "text", which means a blog post
unset($post["type"]);
$post["url"] = $plink;
}
if (!isset($post["type"])) {
$post["type"] = "text";
$post["text"] = trim($body);
}
} elseif (isset($post["url"]) && ($post["type"] == "video")) {
$data = ParseUrl::getSiteinfoCached($post["url"], true);
if (isset($data["images"][0])) {
$post["image"] = $data["images"][0]["src"];
}
}
return $post;
}
/**
* @brief Convert a message into plaintext for connectors to other networks
*
* @param array $b The message array that is about to be posted
* @param int $limit The maximum number of characters when posting to that network
* @param bool $includedlinks Has an attached link to be included into the message?
* @param int $htmlmode This triggers the behaviour of the bbcode conversion
* @param string $target_network Name of the network where the post should go to.
*
* @return string The converted message
*/
public static function toPlaintext($b, $limit = 0, $includedlinks = false, $htmlmode = 2, $target_network = "")
{
// Remove the hash tags
$URLSearchString = "^\[\]";
$body = preg_replace("/([#@])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $b["body"]);
// Add an URL element if the text contains a raw link
$body = preg_replace("/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url]$2[/url]', $body);
// Remove the abstract
$body = remove_abstract($body);
// At first look at data that is attached via "type-..." stuff
// This will hopefully replaced with a dedicated bbcode later
//$post = self::getAttachedData($b["body"]);
$post = self::getAttachedData($body, $b);
if (($b["title"] != "") && ($post["text"] != "")) {
$post["text"] = trim($b["title"]."\n\n".$post["text"]);
} elseif ($b["title"] != "") {
$post["text"] = trim($b["title"]);
}
$abstract = "";
// Fetch the abstract from the given target network
if ($target_network != "") {
$default_abstract = fetch_abstract($b["body"]);
$abstract = fetch_abstract($b["body"], $target_network);
// If we post to a network with no limit we only fetch
// an abstract exactly for this network
if (($limit == 0) && ($abstract == $default_abstract)) {
$abstract = "";
}
} else {// Try to guess the correct target network
switch ($htmlmode) {
case 8:
$abstract = fetch_abstract($b["body"], NETWORK_TWITTER);
break;
case 7:
$abstract = fetch_abstract($b["body"], NETWORK_STATUSNET);
break;
case 6:
$abstract = fetch_abstract($b["body"], NETWORK_APPNET);
break;
default: // We don't know the exact target.
// We fetch an abstract since there is a posting limit.
if ($limit > 0) {
$abstract = fetch_abstract($b["body"]);
}
}
}
if ($abstract != "") {
$post["text"] = $abstract;
if ($post["type"] == "text") {
$post["type"] = "link";
$post["url"] = $b["plink"];
}
}
$html = bbcode($post["text"].$post["after"], false, false, $htmlmode);
$msg = html2plain($html, 0, true);
$msg = trim(html_entity_decode($msg, ENT_QUOTES, 'UTF-8'));
$link = "";
if ($includedlinks) {
if ($post["type"] == "link") {
$link = $post["url"];
} elseif ($post["type"] == "text") {
$link = $post["url"];
} elseif ($post["type"] == "video") {
$link = $post["url"];
} elseif ($post["type"] == "photo") {
$link = $post["image"];
}
if (($msg == "") && isset($post["title"])) {
$msg = trim($post["title"]);
}
if (($msg == "") && isset($post["description"])) {
$msg = trim($post["description"]);
}
// If the link is already contained in the post, then it neeedn't to be added again
// But: if the link is beyond the limit, then it has to be added.
if (($link != "") && strstr($msg, $link)) {
$pos = strpos($msg, $link);
// Will the text be shortened in the link?
// Or is the link the last item in the post?
if (($limit > 0) && ($pos < $limit) && (($pos + 23 > $limit) || ($pos + strlen($link) == strlen($msg)))) {
$msg = trim(str_replace($link, "", $msg));
} elseif (($limit == 0) || ($pos < $limit)) {
// The limit has to be increased since it will be shortened - but not now
// Only do it with Twitter (htmlmode = 8)
if (($limit > 0) && (strlen($link) > 23) && ($htmlmode == 8)) {
$limit = $limit - 23 + strlen($link);
}
$link = "";
if ($post["type"] == "text") {
unset($post["url"]);
}
}
}
}
if ($limit > 0) {
// Reduce multiple spaces
// When posted to a network with limited space, we try to gain space where possible
while (strpos($msg, " ") !== false) {
$msg = str_replace(" ", " ", $msg);
}
// Twitter is using its own limiter, so we always assume that shortened links will have this length
if (iconv_strlen($link, "UTF-8") > 0) {
$limit = $limit - 23;
}
if (iconv_strlen($msg, "UTF-8") > $limit) {
if (($post["type"] == "text") && isset($post["url"])) {
$post["url"] = $b["plink"];
} elseif (!isset($post["url"])) {
$limit = $limit - 23;
$post["url"] = $b["plink"];
// Which purpose has this line? It is now uncommented, but left as a reminder
//} elseif (strpos($b["body"], "[share") !== false) {
// $post["url"] = $b["plink"];
} elseif (PConfig::get($b["uid"], "system", "no_intelligent_shortening")) {
$post["url"] = $b["plink"];
}
$msg = Plaintext::shorten($msg, $limit);
}
}
$post["text"] = trim($msg);
return($post);
}
public static function scaleExternalImages($srctext, $include_link = true, $scale_replace = false)
{
// Suppress "view full size"
if (intval(Config::get('system', 'no_view_full_size'))) {
$include_link = false;
}
// Picture addresses can contain special characters
$s = htmlspecialchars_decode($srctext);
$matches = null;
$c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism', $s, $matches, PREG_SET_ORDER);
if ($c) {
foreach ($matches as $mtch) {
logger('scale_external_image: ' . $mtch[1]);
$hostname = str_replace('www.', '', substr(System::baseUrl(), strpos(System::baseUrl(), '://') + 3));
if (stristr($mtch[1], $hostname)) {
continue;
}
// $scale_replace, if passed, is an array of two elements. The
// first is the name of the full-size image. The second is the
// name of a remote, scaled-down version of the full size image.
// This allows Friendica to display the smaller remote image if
// one exists, while still linking to the full-size image
if ($scale_replace) {
$scaled = str_replace($scale_replace[0], $scale_replace[1], $mtch[1]);
} else {
$scaled = $mtch[1];
}
$i = Network::fetchUrl($scaled);
if (!$i) {
return $srctext;
}
// guess mimetype from headers or filename
$type = Image::guessType($mtch[1], true);
if ($i) {
$Image = new Image($i, $type);
if ($Image->isValid()) {
$orig_width = $Image->getWidth();
$orig_height = $Image->getHeight();
if ($orig_width > 640 || $orig_height > 640) {
$Image->scaleDown(640);
$new_width = $Image->getWidth();
$new_height = $Image->getHeight();
logger('scale_external_images: ' . $orig_width . '->' . $new_width . 'w ' . $orig_height . '->' . $new_height . 'h' . ' match: ' . $mtch[0], LOGGER_DEBUG);
$s = str_replace(
$mtch[0],
'[img=' . $new_width . 'x' . $new_height. ']' . $scaled . '[/img]'
. "\n" . (($include_link)
? '[url=' . $mtch[1] . ']' . L10n::t('view full size') . '[/url]' . "\n"
: ''),
$s
);
logger('scale_external_images: new string: ' . $s, LOGGER_DEBUG);
}
}
}
}
}
// replace the special char encoding
$s = htmlspecialchars($s, ENT_NOQUOTES, 'UTF-8');
return $s;
}
}