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friendica/src/Protocol/Feed.php

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<?php
/**
* @copyright Copyright (C) 2020, Friendica
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Protocol;
use DOMDocument;
use DOMXPath;
use Friendica\Content\PageInfo;
use Friendica\Content\Text\BBCode;
use Friendica\Content\Text\HTML;
use Friendica\Core\Cache\Duration;
use Friendica\Core\Logger;
use Friendica\Core\Protocol;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\Contact;
use Friendica\Model\Item;
use Friendica\Model\Tag;
use Friendica\Model\User;
use Friendica\Util\DateTimeFormat;
use Friendica\Util\Network;
use Friendica\Util\ParseUrl;
use Friendica\Util\Strings;
use Friendica\Util\XML;
/**
* This class contain functions to import feeds (RSS/RDF/Atom)
*/
class Feed
{
/**
* consume - process atom feed and update anything/everything we might need to update
*
* $xml = the (atom) feed to consume - RSS isn't as fully supported but may work for simple feeds.
*
* $importer = the contact_record (joined to user_record) of the local user who owns this relationship.
* It is this person's stuff that is going to be updated.
* $contact = the person who is sending us stuff. If not set, we MAY be processing a "follow" activity
* from an external network and MAY create an appropriate contact record. Otherwise, we MUST
* have a contact record.
* $hub = should we find a hub declation in the feed, pass it back to our calling process, who might (or
* might not) try and subscribe to it.
* $datedir sorts in reverse order
* $pass - by default ($pass = 0) we cannot guarantee that a parent item has been
* imported prior to its children being seen in the stream unless we are certain
* of how the feed is arranged/ordered.
* With $pass = 1, we only pull parent items out of the stream.
* With $pass = 2, we only pull children (comments/likes).
*
* So running this twice, first with pass 1 and then with pass 2 will do the right
* thing regardless of feed ordering. This won't be adequate in a fully-threaded
* model where comments can have sub-threads. That would require some massive sorting
* to get all the feed items into a mostly linear ordering, and might still require
* recursion.
*
* @param $xml
* @param array $importer
* @param array $contact
* @param $hub
* @throws ImagickException
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function consume($xml, array $importer, array $contact, &$hub)
{
if ($contact['network'] === Protocol::OSTATUS) {
Logger::info('Consume OStatus messages');
OStatus::import($xml, $importer, $contact, $hub);
return;
}
if ($contact['network'] === Protocol::FEED) {
Logger::info('Consume feeds');
self::import($xml, $importer, $contact);
return;
}
if ($contact['network'] === Protocol::DFRN) {
Logger::info('Consume DFRN messages');
$dfrn_importer = DFRN::getImporter($contact['id'], $importer['uid']);
if (!empty($dfrn_importer)) {
Logger::info('Now import the DFRN feed');
DFRN::import($xml, $dfrn_importer, true);
return;
}
}
}
/**
* Read a RSS/RDF/Atom feed and create an item entry for it
*
* @param string $xml The feed data
* @param array $importer The user record of the importer
* @param array $contact The contact record of the feed
*
* @return array Returns the header and the first item in dry run mode
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function import($xml, array $importer = [], array $contact = [])
{
$dryRun = empty($importer) && empty($contact);
if ($dryRun) {
Logger::info("Test Atom/RSS feed");
} else {
Logger::info("Import Atom/RSS feed '" . $contact["name"] . "' (Contact " . $contact["id"] . ") for user " . $importer["uid"]);
}
if (empty($xml)) {
Logger::info('XML is empty.');
return [];
}
if (!empty($contact['poll'])) {
$basepath = $contact['poll'];
} elseif (!empty($contact['url'])) {
$basepath = $contact['url'];
} else {
$basepath = '';
}
$doc = new DOMDocument();
@$doc->loadXML(trim($xml));
$xpath = new DOMXPath($doc);
$xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
$xpath->registerNamespace('dc', "http://purl.org/dc/elements/1.1/");
$xpath->registerNamespace('content', "http://purl.org/rss/1.0/modules/content/");
$xpath->registerNamespace('rdf', "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
$xpath->registerNamespace('rss', "http://purl.org/rss/1.0/");
$xpath->registerNamespace('media', "http://search.yahoo.com/mrss/");
$xpath->registerNamespace('poco', ActivityNamespace::POCO);
$author = [];
$entries = null;
// Is it RDF?
if ($xpath->query('/rdf:RDF/rss:channel')->length > 0) {
$author["author-link"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:link/text()');
$author["author-name"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:title/text()');
if (empty($author["author-name"])) {
$author["author-name"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:description/text()');
}
$entries = $xpath->query('/rdf:RDF/rss:item');
}
// Is it Atom?
if ($xpath->query('/atom:feed')->length > 0) {
$alternate = XML::getFirstAttributes($xpath, "atom:link[@rel='alternate']");
if (is_object($alternate)) {
foreach ($alternate AS $attribute) {
if ($attribute->name == "href") {
$author["author-link"] = $attribute->textContent;
}
}
}
if (empty($author["author-link"])) {
$self = XML::getFirstAttributes($xpath, "atom:link[@rel='self']");
if (is_object($self)) {
foreach ($self AS $attribute) {
if ($attribute->name == "href") {
$author["author-link"] = $attribute->textContent;
}
}
}
}
if (empty($author["author-link"])) {
$author["author-link"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:id/text()');
}
$author["author-avatar"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:logo/text()');
$author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:title/text()');
if (empty($author["author-name"])) {
$author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:subtitle/text()');
}
if (empty($author["author-name"])) {
$author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:author/atom:name/text()');
}
$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()');
if ($value != "") {
$author["author-name"] = $value;
}
if ($dryRun) {
$author["author-id"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:author/atom:id/text()');
// See https://tools.ietf.org/html/rfc4287#section-3.2.2
$value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()');
if ($value != "") {
$author["author-link"] = $value;
}
$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()');
if ($value != "") {
$author["author-nick"] = $value;
}
$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()');
if ($value != "") {
$author["author-location"] = $value;
}
$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()');
if ($value != "") {
$author["author-about"] = $value;
}
$avatar = XML::getFirstAttributes($xpath, "atom:author/atom:link[@rel='avatar']");
if (is_object($avatar)) {
foreach ($avatar AS $attribute) {
if ($attribute->name == "href") {
$author["author-avatar"] = $attribute->textContent;
}
}
}
}
$author["edited"] = $author["created"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:updated/text()');
$author["app"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:generator/text()');
$entries = $xpath->query('/atom:feed/atom:entry');
}
// Is it RSS?
if ($xpath->query('/rss/channel')->length > 0) {
$author["author-link"] = XML::getFirstNodeValue($xpath, '/rss/channel/link/text()');
$author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/title/text()');
$author["author-avatar"] = XML::getFirstNodeValue($xpath, '/rss/channel/image/url/text()');
if (empty($author["author-name"])) {
$author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/copyright/text()');
}
if (empty($author["author-name"])) {
$author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/description/text()');
}
$author["edited"] = $author["created"] = XML::getFirstNodeValue($xpath, '/rss/channel/pubDate/text()');
$author["app"] = XML::getFirstNodeValue($xpath, '/rss/channel/generator/text()');
$entries = $xpath->query('/rss/channel/item');
}
if (!$dryRun) {
$author["author-link"] = $contact["url"];
if (empty($author["author-name"])) {
$author["author-name"] = $contact["name"];
}
$author["author-avatar"] = $contact["thumb"];
$author["owner-link"] = $contact["url"];
$author["owner-name"] = $contact["name"];
$author["owner-avatar"] = $contact["thumb"];
}
$header = [];
$header["uid"] = $importer["uid"] ?? 0;
$header["network"] = Protocol::FEED;
$header["wall"] = 0;
$header["origin"] = 0;
$header["gravity"] = GRAVITY_PARENT;
$header["private"] = Item::PUBLIC;
$header["verb"] = Activity::POST;
$header["object-type"] = Activity\ObjectType::NOTE;
$header["contact-id"] = $contact["id"] ?? 0;
if (!is_object($entries)) {
Logger::info("There are no entries in this feed.");
return [];
}
$items = [];
// Limit the number of items that are about to be fetched
$total_items = ($entries->length - 1);
$max_items = DI::config()->get('system', 'max_feed_items');
if (($max_items > 0) && ($total_items > $max_items)) {
$total_items = $max_items;
}
// Importing older entries first
for ($i = $total_items; $i >= 0; --$i) {
$entry = $entries->item($i);
$item = array_merge($header, $author);
$alternate = XML::getFirstAttributes($xpath, "atom:link[@rel='alternate']", $entry);
if (!is_object($alternate)) {
$alternate = XML::getFirstAttributes($xpath, "atom:link", $entry);
}
if (is_object($alternate)) {
foreach ($alternate AS $attribute) {
if ($attribute->name == "href") {
$item["plink"] = $attribute->textContent;
}
}
}
if (empty($item["plink"])) {
$item["plink"] = XML::getFirstNodeValue($xpath, 'link/text()', $entry);
}
if (empty($item["plink"])) {
$item["plink"] = XML::getFirstNodeValue($xpath, 'rss:link/text()', $entry);
}
$item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
if (empty($item["uri"])) {
$item["uri"] = XML::getFirstNodeValue($xpath, 'guid/text()', $entry);
}
if (empty($item["uri"])) {
$item["uri"] = $item["plink"];
}
// Add the base path if missing
$item["uri"] = Network::addBasePath($item["uri"], $basepath);
$item["plink"] = Network::addBasePath($item["plink"], $basepath);
$orig_plink = $item["plink"];
$item["plink"] = DI::httpRequest()->finalUrl($item["plink"]);
$item["parent-uri"] = $item["uri"];
if (!$dryRun) {
$condition = ["`uid` = ? AND `uri` = ? AND `network` IN (?, ?)",
$importer["uid"], $item["uri"], Protocol::FEED, Protocol::DFRN];
$previous = Item::selectFirst(['id'], $condition);
if (DBA::isResult($previous)) {
Logger::info("Item with uri " . $item["uri"] . " for user " . $importer["uid"] . " already existed under id " . $previous["id"]);
continue;
}
}
$item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
if (empty($item["title"])) {
$item["title"] = XML::getFirstNodeValue($xpath, 'title/text()', $entry);
}
if (empty($item["title"])) {
$item["title"] = XML::getFirstNodeValue($xpath, 'rss:title/text()', $entry);
}
$item["title"] = html_entity_decode($item["title"], ENT_QUOTES, 'UTF-8');
$published = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
if (empty($published)) {
$published = XML::getFirstNodeValue($xpath, 'pubDate/text()', $entry);
}
if (empty($published)) {
$published = XML::getFirstNodeValue($xpath, 'dc:date/text()', $entry);
}
$updated = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
if (empty($updated) && !empty($published)) {
$updated = $published;
}
if (empty($published) && !empty($updated)) {
$published = $updated;
}
if ($published != "") {
$item["created"] = $published;
}
if ($updated != "") {
$item["edited"] = $updated;
}
$creator = XML::getFirstNodeValue($xpath, 'author/text()', $entry);
if (empty($creator)) {
$creator = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $entry);
}
if (empty($creator)) {
$creator = XML::getFirstNodeValue($xpath, 'dc:creator/text()', $entry);
}
if ($creator != "") {
$item["author-name"] = $creator;
}
$creator = XML::getFirstNodeValue($xpath, 'dc:creator/text()', $entry);
if ($creator != "") {
$item["author-name"] = $creator;
}
/// @TODO ?
// <category>Ausland</category>
// <media:thumbnail width="152" height="76" url="http://www.taz.de/picture/667875/192/14388767.jpg"/>
$attachments = [];
$enclosures = $xpath->query("enclosure|atom:link[@rel='enclosure']", $entry);
foreach ($enclosures AS $enclosure) {
$href = "";
$length = "";
$type = "";
foreach ($enclosure->attributes AS $attribute) {
if (in_array($attribute->name, ["url", "href"])) {
$href = $attribute->textContent;
} elseif ($attribute->name == "length") {
$length = $attribute->textContent;
} elseif ($attribute->name == "type") {
$type = $attribute->textContent;
}
}
if (!empty($item["attach"])) {
$item["attach"] .= ',';
} else {
$item["attach"] = '';
}
$attachments[] = ["link" => $href, "type" => $type, "length" => $length];
$item["attach"] .= '[attach]href="' . $href . '" length="' . $length . '" type="' . $type . '"[/attach]';
}
$taglist = [];
$categories = $xpath->query("category", $entry);
foreach ($categories AS $category) {
$taglist[] = $category->nodeValue;
}
$body = trim(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
if (empty($body)) {
$body = trim(XML::getFirstNodeValue($xpath, 'content:encoded/text()', $entry));
}
$summary = trim(XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry));
if (empty($summary)) {
$summary = trim(XML::getFirstNodeValue($xpath, 'description/text()', $entry));
}
if (empty($body)) {
$body = $summary;
$summary = '';
}
if ($body == $summary) {
$summary = '';
}
// remove the content of the title if it is identically to the body
// This helps with auto generated titles e.g. from tumblr
if (self::titleIsBody($item["title"], $body)) {
$item["title"] = "";
}
$item["body"] = HTML::toBBCode($body, $basepath);
if (($item["body"] == '') && ($item["title"] != '')) {
$item["body"] = $item["title"];
$item["title"] = '';
}
if ($dryRun) {
$items[] = $item;
break;
} elseif (!Item::isValid($item)) {
Logger::info('Feed is invalid', ['created' => $item['created'], 'uid' => $item['uid'], 'uri' => $item['uri']]);
continue;
}
$preview = '';
if (!empty($contact["fetch_further_information"]) && ($contact["fetch_further_information"] < 3)) {
// Handle enclosures and treat them as preview picture
foreach ($attachments AS $attachment) {
if ($attachment["type"] == "image/jpeg") {
$preview = $attachment["link"];
}
}
// Remove a possible link to the item itself
$item["body"] = str_replace($item["plink"], '', $item["body"]);
$item["body"] = trim(preg_replace('/\[url\=\](\w+.*?)\[\/url\]/i', '', $item["body"]));
// Replace the content when the title is longer than the body
$replace = (strlen($item["title"]) > strlen($item["body"]));
// Replace it, when there is an image in the body
if (strstr($item["body"], '[/img]')) {
$replace = true;
}
// Replace it, when there is a link in the body
if (strstr($item["body"], '[/url]')) {
$replace = true;
}
if ($replace) {
$item["body"] = trim($item["title"]);
}
$data = ParseUrl::getSiteinfoCached($item['plink'], true);
if (!empty($data['text']) && !empty($data['title']) && (mb_strlen($item['body']) < mb_strlen($data['text']))) {
// When the fetched page info text is longer than the body, we do try to enhance the body
if (!empty($item['body']) && (strpos($data['title'], $item['body']) === false) && (strpos($data['text'], $item['body']) === false)) {
// The body is not part of the fetched page info title or page info text. So we add the text to the body
$item['body'] .= "\n\n" . $data['text'];
} else {
// Else we replace the body with the page info text
$item['body'] = $data['text'];
}
}
// We always strip the title since it will be added in the page information
$item["title"] = "";
$item["body"] = $item["body"] . "\n" . PageInfo::getFooterFromUrl($item["plink"], false, $preview, ($contact["fetch_further_information"] == 2), $contact["ffi_keyword_denylist"] ?? '');
$taglist = $contact["fetch_further_information"] == 2 ? PageInfo::getTagsFromUrl($item["plink"], $preview, $contact["ffi_keyword_denylist"] ?? '') : [];
$item["object-type"] = Activity\ObjectType::BOOKMARK;
unset($item["attach"]);
} else {
if (!empty($summary)) {
$item["body"] = '[abstract]' . HTML::toBBCode($summary, $basepath) . "[/abstract]\n" . $item["body"];
}
if (!empty($contact["fetch_further_information"]) && ($contact["fetch_further_information"] == 3)) {
if (empty($taglist)) {
$taglist = PageInfo::getTagsFromUrl($item["plink"], $preview, $contact["ffi_keyword_denylist"] ?? '');
}
$item["body"] .= "\n" . self::tagToString($taglist);
} else {
$taglist = [];
}
// Add the link to the original feed entry if not present in feed
if (($item['plink'] != '') && !strstr($item["body"], $item['plink'])) {
$item["body"] .= "[hr][url]" . $item['plink'] . "[/url]";
}
}
Logger::info('Stored feed', ['item' => $item]);
$notify = Item::isRemoteSelf($contact, $item);
// Distributed items should have a well formatted URI.
// Additionally we have to avoid conflicts with identical URI between imported feeds and these items.
if ($notify) {
$item['guid'] = Item::guidFromUri($orig_plink, DI::baseUrl()->getHostname());
unset($item['uri']);
unset($item['parent-uri']);
// Set the delivery priority for "remote self" to "medium"
$notify = PRIORITY_MEDIUM;
}
$id = Item::insert($item, $notify);
Logger::info("Feed for contact " . $contact["url"] . " stored under id " . $id);
if (!empty($id) && !empty($taglist)) {
$feeditem = Item::selectFirst(['uri-id'], ['id' => $id]);
foreach ($taglist as $tag) {
Tag::store($feeditem['uri-id'], Tag::HASHTAG, $tag);
}
}
}
return ["header" => $author, "items" => $items];
}
/**
* Convert a tag array to a tag string
*
* @param array $tags
* @return string tag string
*/
private static function tagToString(array $tags)
{
$tagstr = '';
foreach ($tags as $tag) {
if ($tagstr != "") {
$tagstr .= ", ";
}
$tagstr .= "#[url=" . DI::baseUrl() . "/search?tag=" . urlencode($tag) . "]" . $tag . "[/url]";
}
return $tagstr;
}
private static function titleIsBody($title, $body)
{
$title = strip_tags($title);
$title = trim($title);
$title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
$title = str_replace(["\n", "\r", "\t", " "], ["", "", "", ""], $title);
$body = strip_tags($body);
$body = trim($body);
$body = html_entity_decode($body, ENT_QUOTES, 'UTF-8');
$body = str_replace(["\n", "\r", "\t", " "], ["", "", "", ""], $body);
if (strlen($title) < strlen($body)) {
$body = substr($body, 0, strlen($title));
}
if (($title != $body) && (substr($title, -3) == "...")) {
$pos = strrpos($title, "...");
if ($pos > 0) {
$title = substr($title, 0, $pos);
$body = substr($body, 0, $pos);
}
}
return ($title == $body);
}
/**
* Creates the Atom feed for a given nickname
*
* Supported filters:
* - activity (default): all the public posts
* - posts: all the public top-level posts
* - comments: all the public replies
*
* Updates the provided last_update parameter if the result comes from the
* cache or it is empty
*
* @param string $owner_nick Nickname of the feed owner
* @param string $last_update Date of the last update
* @param integer $max_items Number of maximum items to fetch
* @param string $filter Feed items filter (activity, posts or comments)
* @param boolean $nocache Wether to bypass caching
*
* @return string Atom feed
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
public static function atom($owner_nick, $last_update, $max_items = 300, $filter = 'activity', $nocache = false)
{
$stamp = microtime(true);
$owner = User::getOwnerDataByNick($owner_nick);
if (!$owner) {
return;
}
$cachekey = "feed:feed:" . $owner_nick . ":" . $filter . ":" . $last_update;
$previous_created = $last_update;
// Don't cache when the last item was posted less then 15 minutes ago (Cache duration)
if ((time() - strtotime($owner['last-item'])) < 15*60) {
$result = DI::cache()->get($cachekey);
if (!$nocache && !is_null($result)) {
Logger::info('Cached feed duration', ['seconds' => number_format(microtime(true) - $stamp, 3), 'nick' => $owner_nick, 'filter' => $filter, 'created' => $previous_created]);
return $result['feed'];
}
}
$check_date = empty($last_update) ? '' : DateTimeFormat::utc($last_update);
$authorid = Contact::getIdForURL($owner["url"]);
$condition = ["`uid` = ? AND `received` > ? AND NOT `deleted` AND `gravity` IN (?, ?)
AND `private` != ? AND `visible` AND `wall` AND `parent-network` IN (?, ?, ?, ?)",
$owner["uid"], $check_date, GRAVITY_PARENT, GRAVITY_COMMENT,
Item::PRIVATE, Protocol::ACTIVITYPUB,
Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA];
if ($filter === 'comments') {
$condition[0] .= " AND `object-type` = ? ";
$condition[] = Activity\ObjectType::COMMENT;
}
if ($owner['account-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
$condition[0] .= " AND `contact-id` = ? AND `author-id` = ?";
$condition[] = $owner["id"];
$condition[] = $authorid;
}
$params = ['order' => ['received' => true], 'limit' => $max_items];
if ($filter === 'posts') {
$ret = Item::selectThread([], $condition, $params);
} else {
$ret = Item::select([], $condition, $params);
}
$items = Item::inArray($ret);
$doc = new DOMDocument('1.0', 'utf-8');
$doc->formatOutput = true;
$root = self::addHeader($doc, $owner, $filter);
foreach ($items as $item) {
$entry = self::entry($doc, $item, $owner);
$root->appendChild($entry);
if ($last_update < $item['created']) {
$last_update = $item['created'];
}
}
$feeddata = trim($doc->saveXML());
$msg = ['feed' => $feeddata, 'last_update' => $last_update];
DI::cache()->set($cachekey, $msg, Duration::QUARTER_HOUR);
Logger::info('Feed duration', ['seconds' => number_format(microtime(true) - $stamp, 3), 'nick' => $owner_nick, 'filter' => $filter, 'created' => $previous_created]);
return $feeddata;
}
/**
* Adds the header elements to the XML document
*
* @param DOMDocument $doc XML document
* @param array $owner Contact data of the poster
* @param string $filter The related feed filter (activity, posts or comments)
*
* @return object header root element
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function addHeader(DOMDocument $doc, array $owner, $filter)
{
$root = $doc->createElementNS(ActivityNamespace::ATOM1, 'feed');
$doc->appendChild($root);
$title = '';
$selfUri = '/feed/' . $owner["nick"] . '/';
switch ($filter) {
case 'activity':
$title = DI::l10n()->t('%s\'s timeline', $owner['name']);
$selfUri .= $filter;
break;
case 'posts':
$title = DI::l10n()->t('%s\'s posts', $owner['name']);
break;
case 'comments':
$title = DI::l10n()->t('%s\'s comments', $owner['name']);
$selfUri .= $filter;
break;
}
$attributes = ["uri" => "https://friendi.ca", "version" => FRIENDICA_VERSION . "-" . DB_UPDATE_VERSION];
XML::addElement($doc, $root, "generator", FRIENDICA_PLATFORM, $attributes);
XML::addElement($doc, $root, "id", DI::baseUrl() . "/profile/" . $owner["nick"]);
XML::addElement($doc, $root, "title", $title);
XML::addElement($doc, $root, "subtitle", sprintf("Updates from %s on %s", $owner["name"], DI::config()->get('config', 'sitename')));
XML::addElement($doc, $root, "logo", $owner["photo"]);
XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
$author = self::addAuthor($doc, $owner);
$root->appendChild($author);
$attributes = ["href" => $owner["url"], "rel" => "alternate", "type" => "text/html"];
XML::addElement($doc, $root, "link", "", $attributes);
OStatus::hublinks($doc, $root, $owner["nick"]);
$attributes = ["href" => DI::baseUrl() . $selfUri, "rel" => "self", "type" => "application/atom+xml"];
XML::addElement($doc, $root, "link", "", $attributes);
return $root;
}
/**
* Adds the author element to the XML document
*
* @param DOMDocument $doc XML document
* @param array $owner Contact data of the poster
*
* @return \DOMElement author element
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function addAuthor(DOMDocument $doc, array $owner)
{
$author = $doc->createElement("author");
XML::addElement($doc, $author, "uri", $owner["url"]);
XML::addElement($doc, $author, "name", $owner["nick"]);
XML::addElement($doc, $author, "email", $owner["addr"]);
return $author;
}
/**
* Adds an entry element to the XML document
*
* @param DOMDocument $doc XML document
* @param array $item Data of the item that is to be posted
* @param array $owner Contact data of the poster
* @param bool $toplevel optional default false
*
* @return \DOMElement Entry element
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function entry(DOMDocument $doc, array $item, array $owner)
{
$xml = null;
$repeated_guid = OStatus::getResharedGuid($item);
if ($repeated_guid != "") {
$xml = self::reshareEntry($doc, $item, $owner, $repeated_guid);
}
if ($xml) {
return $xml;
}
return self::noteEntry($doc, $item, $owner);
}
/**
* Adds an entry element with reshared content
*
* @param DOMDocument $doc XML document
* @param array $item Data of the item that is to be posted
* @param array $owner Contact data of the poster
* @param string $repeated_guid guid
* @param bool $toplevel Is it for en entry element (false) or a feed entry (true)?
*
* @return bool Entry element
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function reshareEntry(DOMDocument $doc, array $item, array $owner, $repeated_guid)
{
if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
Logger::info('Feed entry author does not match feed owner', ['owner' => $owner["url"], 'author' => $item["author-link"]]);
}
$entry = OStatus::entryHeader($doc, $owner, $item, false);
$condition = ['uid' => $owner["uid"], 'guid' => $repeated_guid, 'private' => [Item::PUBLIC, Item::UNLISTED],
'network' => Protocol::FEDERATED];
$repeated_item = Item::selectFirst([], $condition);
if (!DBA::isResult($repeated_item)) {
return false;
}
self::entryContent($doc, $entry, $item, self::getTitle($repeated_item), Activity::SHARE, false);
self::entryFooter($doc, $entry, $item, $owner);
return $entry;
}
/**
* Adds a regular entry element
*
* @param DOMDocument $doc XML document
* @param array $item Data of the item that is to be posted
* @param array $owner Contact data of the poster
* @param bool $toplevel Is it for en entry element (false) or a feed entry (true)?
*
* @return \DOMElement Entry element
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function noteEntry(DOMDocument $doc, array $item, array $owner)
{
if (($item['gravity'] != GRAVITY_PARENT) && (Strings::normaliseLink($item["author-link"]) != Strings::normaliseLink($owner["url"]))) {
Logger::info('Feed entry author does not match feed owner', ['owner' => $owner["url"], 'author' => $item["author-link"]]);
}
$entry = OStatus::entryHeader($doc, $owner, $item, false);
self::entryContent($doc, $entry, $item, self::getTitle($item), '', true);
self::entryFooter($doc, $entry, $item, $owner);
return $entry;
}
/**
* Adds elements to the XML document
*
* @param DOMDocument $doc XML document
* @param \DOMElement $entry Entry element where the content is added
* @param array $item Data of the item that is to be posted
* @param array $owner Contact data of the poster
* @param string $title Title for the post
* @param string $verb The activity verb
* @param bool $complete Add the "status_net" element?
* @param bool $feed_mode Behave like a regular feed for users if true
* @return void
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function entryContent(DOMDocument $doc, \DOMElement $entry, array $item, $title, $verb = "", $complete = true)
{
if ($verb == "") {
$verb = OStatus::constructVerb($item);
}
XML::addElement($doc, $entry, "id", $item["uri"]);
XML::addElement($doc, $entry, "title", html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
$body = OStatus::formatPicturePost($item['body']);
$body = BBCode::convert($body, false, BBCode::OSTATUS);
XML::addElement($doc, $entry, "content", $body, ["type" => "html"]);
XML::addElement($doc, $entry, "link", "", ["rel" => "alternate", "type" => "text/html",
"href" => DI::baseUrl()."/display/".$item["guid"]]
);
XML::addElement($doc, $entry, "published", DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM));
XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM));
}
/**
* Adds the elements at the foot of an entry to the XML document
*
* @param DOMDocument $doc XML document
* @param object $entry The entry element where the elements are added
* @param array $item Data of the item that is to be posted
* @param array $owner Contact data of the poster
* @param bool $complete default true
* @return void
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function entryFooter(DOMDocument $doc, $entry, array $item, array $owner)
{
$mentioned = [];
if ($item['gravity'] != GRAVITY_PARENT) {
$parent = Item::selectFirst(['guid', 'author-link', 'owner-link'], ['id' => $item['parent']]);
$parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
$thrparent = Item::selectFirst(['guid', 'author-link', 'owner-link', 'plink'], ['uid' => $owner["uid"], 'uri' => $parent_item]);
if (DBA::isResult($thrparent)) {
$mentioned[$thrparent["author-link"]] = $thrparent["author-link"];
$mentioned[$thrparent["owner-link"]] = $thrparent["owner-link"];
$parent_plink = $thrparent["plink"];
} else {
$mentioned[$parent["author-link"]] = $parent["author-link"];
$mentioned[$parent["owner-link"]] = $parent["owner-link"];
$parent_plink = DI::baseUrl()."/display/".$parent["guid"];
}
$attributes = [
"ref" => $parent_item,
"href" => $parent_plink];
XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
$attributes = [
"rel" => "related",
"href" => $parent_plink];
XML::addElement($doc, $entry, "link", "", $attributes);
}
// uri-id isn't present for follow entry pseudo-items
$tags = Tag::getByURIId($item['uri-id'] ?? 0);
foreach ($tags as $tag) {
$mentioned[$tag['url']] = $tag['url'];
}
foreach ($tags as $tag) {
if ($tag['type'] == Tag::HASHTAG) {
XML::addElement($doc, $entry, "category", "", ["term" => $tag['name']]);
}
}
OStatus::getAttachment($doc, $entry, $item);
}
/**
* Fetch or create title for feed entry
*
* @param array $item
* @return string title
*/
private static function getTitle(array $item)
{
if ($item['title'] != '') {
return BBCode::convert($item['title'], false, BBCode::OSTATUS);
}
// Fetch information about the post
$siteinfo = BBCode::getAttachedData($item["body"]);
if (isset($siteinfo["title"])) {
return $siteinfo["title"];
}
// If no bookmark is found then take the first line
// Remove the share element before fetching the first line
$title = trim(preg_replace("/\[share.*?\](.*?)\[\/share\]/ism","\n$1\n",$item['body']));
$title = HTML::toPlaintext(BBCode::convert($title, false), 0, true)."\n";
$pos = strpos($title, "\n");
$trailer = "";
if (($pos == 0) || ($pos > 100)) {
$pos = 100;
$trailer = "...";
}
return substr($title, 0, $pos) . $trailer;
}
}
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