]> git.mxchange.org Git - friendica.git/blobdiff - mod/display.php
Merge branch 'develop' into task/3954-move-auth-to-src
[friendica.git] / mod / display.php
index 4adb860f39ed29f1bfb87b7e980e1dc3e5471b1a..2d91d2d1aed782d8036373ee7292e5bb497eb2bf 100644 (file)
@@ -1,12 +1,15 @@
 <?php
 
 use Friendica\App;
-
-require_once('include/dfrn.php');
+use Friendica\Core\Config;
+use Friendica\Core\System;
+use Friendica\Database\DBM;
+use Friendica\Model\Contact;
+use Friendica\Model\Group;
+use Friendica\Protocol\DFRN;
 
 function display_init(App $a) {
-
-       if ((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
+       if (Config::get('system','block_public') && !local_user() && !remote_user()) {
                return;
        }
 
@@ -16,120 +19,94 @@ function display_init(App $a) {
        if ($a->argc == 3) {
                if (substr($a->argv[2], -5) == '.atom') {
                        $item_id = substr($a->argv[2], 0, -5);
-                       $xml = dfrn::itemFeed($item_id);
-                       if ($xml == '') {
-                               http_status_exit(500);
-                       }
-                       header("Content-type: application/atom+xml");
-                       echo $xml;
-                       killme();
+                       displayShowFeed($item_id, false);
                }
        }
 
+       if ($a->argc == 4) {
+               if ($a->argv[3] == 'conversation.atom') {
+                       $item_id = $a->argv[2];
+                       displayShowFeed($item_id, true);
+               }
+       }
+
+       $r = false;
+
        // If there is only one parameter, then check if this parameter could be a guid
        if ($a->argc == 2) {
                $nick = "";
-               $itemuid = 0;
+               $r = false;
 
                // Does the local user have this item?
                if (local_user()) {
-                       $r = dba::fetch_first("SELECT `id`, `parent`, `author-name`, `author-link`, `author-avatar`, `network`, `body`, `uid`, `owner-link` FROM `item`
-                               WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
+                       $r = dba::fetch_first("SELECT `id`, `parent`, `author-name`, `author-link`,
+                                               `author-avatar`, `network`, `body`, `uid`, `owner-link`
+                               FROM `item` WHERE `visible` AND NOT `deleted` AND NOT `moderated`
                                        AND `guid` = ? AND `uid` = ? LIMIT 1", $a->argv[1], local_user());
-                       if (dbm::is_result($r)) {
+                       if (DBM::is_result($r)) {
                                $nick = $a->user["nickname"];
-                               $itemuid = local_user();
-                       }
-               }
-
-               // Or is it anywhere on the server?
-               if ($nick == "") {
-                       $r = dba::fetch_first("SELECT `user`.`nickname`, `item`.`id`, `item`.`parent`, `item`.`author-name`,
-                               `item`.`author-link`, `item`.`author-avatar`, `item`.`network`, `item`.`uid`, `item`.`owner-link`, `item`.`body`
-                               FROM `item` STRAIGHT_JOIN `user` ON `user`.`uid` = `item`.`uid`
-                               WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
-                                       AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
-                                       AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
-                                       AND NOT `item`.`private` AND NOT `user`.`hidewall`
-                                       AND `item`.`guid` = ? LIMIT 1", $a->argv[1]);
-                       if (dbm::is_result($r)) {
-                               $nick = $r["nickname"];
-                               $itemuid = $r["uid"];
                        }
                }
 
                // Is it an item with uid=0?
-               if ($nick == "") {
-                       $r = dba::fetch_first("SELECT `item`.`id`, `item`.`parent`, `item`.`author-name`, `item`.`author-link`,
-                               `item`.`author-avatar`, `item`.`network`, `item`.`uid`, `item`.`owner-link`, `item`.`body`
-                               FROM `item` WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
-                                       AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
-                                       AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
-                                       AND NOT `item`.`private` AND `item`.`uid` = 0
-                                       AND `item`.`guid` = ? LIMIT 1", $a->argv[1]);
+               if (!DBM::is_result($r)) {
+                       $r = dba::fetch_first("SELECT `id`, `parent`, `author-name`, `author-link`,
+                                               `author-avatar`, `network`, `body`, `uid`, `owner-link`
+                               FROM `item` WHERE `visible` AND NOT `deleted` AND NOT `moderated`
+                                       AND NOT `private` AND `uid` = 0
+                                       AND `guid` = ? LIMIT 1", $a->argv[1]);
                }
-               if (dbm::is_result($r)) {
-                       if ($r["id"] != $r["parent"]) {
-                               $r = dba::fetch_first("SELECT `id`, `author-name`, `author-link`, `author-avatar`, `network`, `body`, `uid`, `owner-link` FROM `item`
-                                       WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
-                                               AND `id` = ?", $r["parent"]);
-                       }
-                       if (($itemuid != local_user()) && local_user()) {
-                               // Do we know this contact but we haven't got this item?
-                               // Copy the wohle thread to our local storage so that we can interact.
-                               // We really should change this need for the future since it scales very bad.
-                               $contactid = get_contact($r['owner-link'], local_user());
-                               if ($contactid) {
-                                       $items = dba::select('item', array(), array('parent' => $r["id"]), array('order' => array('id')));
-                                       while ($item = dba::fetch($items)) {
-                                               $itemcontactid = get_contact($item['owner-link'], local_user());
-                                               if (!$itemcontactid) {
-                                                       $itemcontactid = $contactid;
-                                               }
-                                               unset($item['id']);
-                                               $item['uid'] = local_user();
-                                               $item['origin'] = 0;
-                                               $item['contact-id'] = $itemcontactid;
-                                               $local_copy = item_store($item, false, false, true);
-                                               logger("Stored local copy for post ".$item['guid']." under id ".$local_copy, LOGGER_DEBUG);
-                                       }
-                                       dba::close($items);
-                               }
-                       }
 
-                       $profiledata = display_fetchauthor($a, $r);
-
-                       if (strstr(normalise_link($profiledata["url"]), normalise_link(App::get_baseurl()))) {
-                               $nickname = str_replace(normalise_link(App::get_baseurl())."/profile/", "", normalise_link($profiledata["url"]));
-
-                               if (($nickname != $a->user["nickname"])) {
-                                       $r = dba::fetch_first("SELECT `profile`.`uid` AS `profile_uid`, `profile`.* , `contact`.`avatar-date` AS picdate, `user`.* FROM `profile`
-                                               INNER JOIN `contact` on `contact`.`uid` = `profile`.`uid` INNER JOIN `user` ON `profile`.`uid` = `user`.`uid`
-                                               WHERE `user`.`nickname` = ? AND `profile`.`is-default` AND `contact`.`self` LIMIT 1",
-                                               $nickname
-                                       );
-                                       if (dbm::is_result($r)) {
-                                               $profiledata = $r;
-                                       }
-                                       $profiledata["network"] = NETWORK_DFRN;
-                               } else {
-                                       $profiledata = array();
-                               }
-                       }
-               } else {
+               if (!DBM::is_result($r)) {
                        $a->error = 404;
                        notice(t('Item not found.') . EOL);
                        return;
                }
+       } elseif (($a->argc == 3) && ($nick == 'feed-item')) {
+               $r = dba::fetch_first("SELECT `id`, `parent`, `author-name`, `author-link`,
+                                       `author-avatar`, `network`, `body`, `uid`, `owner-link`
+                       FROM `item` WHERE `visible` AND NOT `deleted` AND NOT `moderated`
+                               AND NOT `private` AND `uid` = 0
+                               AND `id` = ? LIMIT 1", $a->argv[2]);
+       }
+
+       if (DBM::is_result($r)) {
+               if (strstr($_SERVER['HTTP_ACCEPT'], 'application/atom+xml')) {
+                       logger('Directly serving XML for id '.$r["id"], LOGGER_DEBUG);
+                       displayShowFeed($r["id"], false);
+               }
+
+               if ($r["id"] != $r["parent"]) {
+                       $r = dba::fetch_first("SELECT `id`, `author-name`, `author-link`, `author-avatar`, `network`, `body`, `uid`, `owner-link` FROM `item`
+                               WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
+                                       AND `id` = ?", $r["parent"]);
+               }
+
+               $profiledata = display_fetchauthor($a, $r);
+
+               if (strstr(normalise_link($profiledata["url"]), normalise_link(System::baseUrl()))) {
+                       $nickname = str_replace(normalise_link(System::baseUrl())."/profile/", "", normalise_link($profiledata["url"]));
+
+                       if (($nickname != $a->user["nickname"])) {
+                               $r = dba::fetch_first("SELECT `profile`.`uid` AS `profile_uid`, `profile`.* , `contact`.`avatar-date` AS picdate, `user`.* FROM `profile`
+                                       INNER JOIN `contact` on `contact`.`uid` = `profile`.`uid` INNER JOIN `user` ON `profile`.`uid` = `user`.`uid`
+                                       WHERE `user`.`nickname` = ? AND `profile`.`is-default` AND `contact`.`self` LIMIT 1",
+                                       $nickname
+                               );
+                               if (DBM::is_result($r)) {
+                                       $profiledata = $r;
+                               }
+                               $profiledata["network"] = NETWORK_DFRN;
+                       } else {
+                               $profiledata = array();
+                       }
+               }
        }
 
        profile_load($a, $nick, 0, $profiledata);
 }
 
 function display_fetchauthor($a, $item) {
-
-       require_once("include/Contact.php");
-
        $profiledata = array();
        $profiledata["uid"] = -1;
        $profiledata["nickname"] = $item["author-name"];
@@ -195,13 +172,13 @@ function display_fetchauthor($a, $item) {
                $profiledata["about"] = "";
        }
 
-       $profiledata = get_contact_details_by_url($profiledata["url"], local_user(), $profiledata);
+       $profiledata = Contact::getDetailsByURL($profiledata["url"], local_user(), $profiledata);
 
-       $profiledata["photo"] = App::remove_baseurl($profiledata["photo"]);
+       $profiledata["photo"] = System::removedBaseUrl($profiledata["photo"]);
 
        if (local_user()) {
                if (in_array($profiledata["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS))) {
-                       $profiledata["remoteconnect"] = App::get_baseurl()."/follow?url=".urlencode($profiledata["url"]);
+                       $profiledata["remoteconnect"] = System::baseUrl()."/follow?url=".urlencode($profiledata["url"]);
                }
        } elseif ($profiledata["network"] == NETWORK_DFRN) {
                $connect = str_replace("/profile/", "/dfrn_request/", $profiledata["url"]);
@@ -211,80 +188,52 @@ function display_fetchauthor($a, $item) {
        return($profiledata);
 }
 
-function display_content(App $a, $update = 0) {
-
-       if ((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
+function display_content(App $a, $update = false, $update_uid = 0) {
+       if (Config::get('system','block_public') && !local_user() && !remote_user()) {
                notice(t('Public access denied.') . EOL);
                return;
        }
 
-       require_once('include/security.php');
-       require_once('include/conversation.php');
-       require_once('include/acl_selectors.php');
-
+       require_once 'include/security.php';
+       require_once 'include/conversation.php';
+       require_once 'include/acl_selectors.php';
 
        $o = '';
 
-       if ($update) {
-               $nick = $_REQUEST['nick'];
-       } else {
-               $nick = (($a->argc > 1) ? $a->argv[1] : '');
-       }
-
        if ($update) {
                $item_id = $_REQUEST['item_id'];
-               $a->profile = array('uid' => intval($update), 'profile_uid' => intval($update));
+               $item = dba::select('item', ['uid', 'parent'], ['id' => $item_id], ['limit' => 1]);
+               $a->profile = array('uid' => intval($item['uid']), 'profile_uid' => intval($item['uid']));
+               $item_parent = $item['parent'];
        } else {
                $item_id = (($a->argc > 2) ? $a->argv[2] : 0);
 
                if ($a->argc == 2) {
-                       $nick = "";
+                       $item_parent = 0;
 
                        if (local_user()) {
-                               $r = dba::fetch_first("SELECT `id` FROM `item`
+                               $r = dba::fetch_first("SELECT `id`, `parent` FROM `item`
                                        WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
                                                AND `guid` = ? AND `uid` = ?", $a->argv[1], local_user());
-                               if (dbm::is_result($r)) {
+                               if (DBM::is_result($r)) {
                                        $item_id = $r["id"];
-                                       $nick = $a->user["nickname"];
+                                       $item_parent = $r["parent"];
                                }
                        }
 
-                       if ($nick == "") {
-                               $r = dba::fetch_first("SELECT `user`.`nickname`, `item`.`id` FROM `item` STRAIGHT_JOIN `user` ON `user`.`uid` = `item`.`uid`
+                       if ($item_parent == 0) {
+                               $r = dba::fetch_first("SELECT `item`.`id`, `item`.`parent` FROM `item`
                                        WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
-                                               AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
-                                               AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
-                                               AND NOT `item`.`private` AND NOT `user`.`hidewall`
-                                               AND `item`.`guid` = ?", $a->argv[1]);
-                               if (dbm::is_result($r)) {
-                                       $item_id = $r["id"];
-                                       $nick = $r["nickname"];
-                               }
-                       }
-                       if ($nick == "") {
-                               $r = dba::fetch_first("SELECT `item`.`id` FROM `item`
-                                       WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
-                                               AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
-                                               AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
                                                AND NOT `item`.`private` AND `item`.`uid` = 0
                                                AND `item`.`guid` = ?", $a->argv[1]);
-                               if (dbm::is_result($r)) {
+                               if (DBM::is_result($r)) {
                                        $item_id = $r["id"];
+                                       $item_parent = $r["parent"];
                                }
                        }
                }
        }
 
-       if ($item_id && !is_numeric($item_id)) {
-               $r = dba::select('item', array('id'), array('uri' => $item_id, 'uid' => $a->profile['uid']), array('limit' => 1));
-               if (dbm::is_result($r)) {
-                       $item_id = $r["id"];
-               } else {
-                       $item_id = false;
-               }
-       }
-
        if (!$item_id) {
                $a->error = 404;
                notice(t('Item not found.').EOL);
@@ -292,15 +241,19 @@ function display_content(App $a, $update = 0) {
        }
 
        // We are displaying an "alternate" link if that post was public. See issue 2864
-       $is_public = dba::exists('item', array('id' => $item_id, 'private' => false, 'wall' => true));
+       $is_public = dba::exists('item', array('id' => $item_id, 'private' => false));
        if ($is_public) {
-               $alternate = App::get_baseurl().'/display/'.$nick.'/'.$item_id.'.atom';
+               // For the atom feed the nickname doesn't matter at all, we only need the item id.
+               $alternate = System::baseUrl().'/display/feed-item/'.$item_id.'.atom';
+               $conversation = System::baseUrl().'/display/feed-item/'.$item_parent.'/conversation.atom';
        } else {
                $alternate = '';
+               $conversation = '';
        }
 
        $a->page['htmlhead'] .= replace_macros(get_markup_template('display-head.tpl'),
-                               array('$alternate' => $alternate));
+                               array('$alternate' => $alternate,
+                                       '$conversation' => $conversation));
 
        $groups = array();
 
@@ -309,7 +262,7 @@ function display_content(App $a, $update = 0) {
 
        $contact_id = 0;
 
-       if (is_array($_SESSION['remote'])) {
+       if (x($_SESSION, 'remote') && is_array($_SESSION['remote'])) {
                foreach ($_SESSION['remote'] as $v) {
                        if ($v['uid'] == $a->profile['uid']) {
                                $contact_id = $v['cid'];
@@ -319,12 +272,12 @@ function display_content(App $a, $update = 0) {
        }
 
        if ($contact_id) {
-               $groups = init_groups_visitor($contact_id);
+               $groups = Group::getIdsByContactId($contact_id);
                $r = dba::fetch_first("SELECT * FROM `contact` WHERE `id` = ? AND `uid` = ? LIMIT 1",
                        $contact_id,
                        $a->profile['uid']
                );
-               if (dbm::is_result($r)) {
+               if (DBM::is_result($r)) {
                        $contact = $r;
                        $remote_contact = true;
                }
@@ -338,25 +291,24 @@ function display_content(App $a, $update = 0) {
        }
 
        $r = dba::fetch_first("SELECT * FROM `contact` WHERE `uid` = ? AND `self` LIMIT 1", $a->profile['uid']);
-       if (dbm::is_result($r)) {
+       if (DBM::is_result($r)) {
                $a->page_contact = $r;
        }
-       $is_owner = ((local_user()) && (local_user() == $a->profile['profile_uid']) ? true : false);
+       $is_owner = (local_user() && (in_array($a->profile['profile_uid'], [local_user(), 0])) ? true : false);
 
-       if ($a->profile['hidewall'] && (! $is_owner) && (! $remote_contact)) {
+       if (x($a->profile, 'hidewall') && !$is_owner && !$remote_contact) {
                notice(t('Access to this profile has been restricted.') . EOL);
                return;
        }
 
        // We need the editor here to be able to reshare an item.
-
        if ($is_owner) {
                $x = array(
                        'is_owner' => true,
                        'allow_location' => $a->user['allow_location'],
                        'default_location' => $a->user['default-location'],
                        'nickname' => $a->user['nickname'],
-                       'lockstate' => ( (is_array($a->user)) && ((strlen($a->user['allow_cid'])) || (strlen($a->user['allow_gid'])) || (strlen($a->user['deny_cid'])) || (strlen($a->user['deny_gid']))) ? 'lock' : 'unlock'),
+                       'lockstate' => (is_array($a->user) && (strlen($a->user['allow_cid']) || strlen($a->user['allow_gid']) || strlen($a->user['deny_cid']) || strlen($a->user['deny_gid'])) ? 'lock' : 'unlock'),
                        'acl' => populate_acl($a->user, true),
                        'bang' => '',
                        'visitor' => 'block',
@@ -366,13 +318,12 @@ function display_content(App $a, $update = 0) {
                $o .= status_editor($a,$x,0,true);
        }
 
-       $sql_extra = item_permissions_sql($a->profile['uid'],$remote_contact,$groups);
+       $sql_extra = item_permissions_sql($a->profile['uid'], $remote_contact, $groups);
 
        if ($update) {
-               $r = dba::p("SELECT `id` FROM `item` WHERE `item`.`uid` = ?
-                       AND `item`.`parent` = (SELECT `parent` FROM `item` WHERE `id` = ?)
+               $r = dba::p("SELECT `id` FROM `item` WHERE
+                       `item`.`parent` = (SELECT `parent` FROM `item` WHERE `id` = ?)
                        $sql_extra AND `unseen`",
-                       $a->profile['uid'],
                        $item_id
                );
 
@@ -381,123 +332,96 @@ function display_content(App $a, $update = 0) {
                }
        }
 
-       $r = dba::p(item_query()." AND `item`.`uid` = ?
-               AND `item`.`parent` = (SELECT `parent` FROM `item` WHERE `id` = ?)
+       $r = dba::p(item_query()."AND `item`.`parent` = (SELECT `parent` FROM `item` WHERE `id` = ?)
                $sql_extra
                ORDER BY `parent` DESC, `gravity` ASC, `id` ASC",
-               $a->profile['uid'],
                $item_id
        );
 
-       if (!dbm::is_result($r) && local_user()) {
-               // Check if this is another person's link to a post that we have
-               $r = dba::fetch_first("SELECT `item`.uri FROM `item`
-                       WHERE (`item`.`id` = ? OR `item`.`uri` = ?)
-                       LIMIT 1",
-                       $item_id,
-                       $item_id
-               );
-               if (dbm::is_result($r)) {
-                       $item_uri = $r['uri'];
-
-                       $r = dba::p(item_query()." AND `item`.`uid` = ?
-                               AND `item`.`parent` = (SELECT `parent` FROM `item` WHERE `uri` = ? AND uid = ?)
-                               ORDER BY `parent` DESC, `gravity` ASC, `id` ASC",
-                               local_user(),
-                               $item_uri,
-                               local_user()
-                       );
-               }
+       if (!DBM::is_result($r)) {
+               notice(t('Item not found.') . EOL);
+               return $o;
        }
 
-       if (dbm::is_result($r)) {
-               $s = dba::inArray($r);
+       $s = dba::inArray($r);
 
-               if ((local_user()) && (local_user() == $a->profile['uid'])) {
-                       $unseen = dba::select('item', array('id'), array('parent' => $s[0]['parent'], 'unseen' => true), array('limit' => 1));
-                       if (dbm::is_result($unseen)) {
-                               dba::update('item', array('unseen' => false), array('parent' => $s[0]['parent'], 'unseen' => true));
-                       }
+       if (local_user() && (local_user() == $a->profile['uid'])) {
+               $unseen = dba::select('item', array('id'), array('parent' => $s[0]['parent'], 'unseen' => true), array('limit' => 1));
+               if (DBM::is_result($unseen)) {
+                       dba::update('item', array('unseen' => false), array('parent' => $s[0]['parent'], 'unseen' => true));
                }
+       }
 
-               $items = conv_sort($s, "`commented`");
-
-               if (!$update) {
-                       $o .= "<script> var netargs = '?f=&nick=" . $nick . "&item_id=" . $item_id . "'; </script>";
-               }
-               $o .= conversation($a, $items, 'display', $update);
-
-               // Preparing the meta header
-               require_once('include/bbcode.php');
-               require_once("include/html2plain.php");
-               $description = trim(html2plain(bbcode($s[0]["body"], false, false), 0, true));
-               $title = trim(html2plain(bbcode($s[0]["title"], false, false), 0, true));
-               $author_name = $s[0]["author-name"];
-
-               $image = $a->remove_baseurl($s[0]["author-thumb"]);
+       $items = conv_sort($s, "`commented`");
 
-               if ($title == "") {
-                       $title = $author_name;
-               }
+       if (!$update) {
+               $o .= "<script> var netargs = '?f=&item_id=" . $item_id . "'; </script>";
+       }
+       $o .= conversation($a, $items, 'display', $update_uid);
 
-               // Limit the description to 160 characters
-               if (strlen($description) > 160) {
-                       $description = substr($description, 0, 157) . '...';
-               }
+       // Preparing the meta header
+       require_once 'include/bbcode.php';
+       require_once 'include/html2plain.php';
+       $description = trim(html2plain(bbcode($s[0]["body"], false, false), 0, true));
+       $title = trim(html2plain(bbcode($s[0]["title"], false, false), 0, true));
+       $author_name = $s[0]["author-name"];
 
-               $description = htmlspecialchars($description, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
-               $title = htmlspecialchars($title, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
-               $author_name = htmlspecialchars($author_name, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
-
-               //<meta name="keywords" content="">
-               $a->page['htmlhead'] .= '<meta name="author" content="'.$author_name.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="title" content="'.$title.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="fulltitle" content="'.$title.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="description" content="'.$description.'" />'."\n";
-
-               // Schema.org microdata
-               $a->page['htmlhead'] .= '<meta itemprop="name" content="'.$title.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta itemprop="description" content="'.$description.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta itemprop="image" content="'.$image.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta itemprop="author" content="'.$author_name.'" />'."\n";
-
-               // Twitter cards
-               $a->page['htmlhead'] .= '<meta name="twitter:card" content="summary" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="twitter:title" content="'.$title.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="twitter:description" content="'.$description.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="twitter:image" content="'.$image.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="twitter:url" content="'.$s[0]["plink"].'" />'."\n";
-
-               // Dublin Core
-               $a->page['htmlhead'] .= '<meta name="DC.title" content="'.$title.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="DC.description" content="'.$description.'" />'."\n";
-
-               // Open Graph
-               $a->page['htmlhead'] .= '<meta property="og:type" content="website" />'."\n";
-               $a->page['htmlhead'] .= '<meta property="og:title" content="'.$title.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta property="og:image" content="'.$image.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta property="og:url" content="'.$s[0]["plink"].'" />'."\n";
-               $a->page['htmlhead'] .= '<meta property="og:description" content="'.$description.'" />'."\n";
-               $a->page['htmlhead'] .= '<meta name="og:article:author" content="'.$author_name.'" />'."\n";
-               // article:tag
+       $image = $a->remove_baseurl($s[0]["author-thumb"]);
 
-               return $o;
+       if ($title == "") {
+               $title = $author_name;
        }
 
-       $r = dba::fetch_first("SELECT `id`,`deleted` FROM `item` WHERE `id` = ? OR `uri` = ? LIMIT 1",
-               $item_id,
-               $item_id
-       );
-       if ($r) {
-               if ($r['deleted']) {
-                       notice(t('Item has been removed.') . EOL);
-               } else {
-                       notice(t('Permission denied.') . EOL);
-               }
-       } else {
-               notice(t('Item not found.') . EOL);
+       // Limit the description to 160 characters
+       if (strlen($description) > 160) {
+               $description = substr($description, 0, 157) . '...';
        }
 
+       $description = htmlspecialchars($description, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
+       $title = htmlspecialchars($title, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
+       $author_name = htmlspecialchars($author_name, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
+
+       //<meta name="keywords" content="">
+       $a->page['htmlhead'] .= '<meta name="author" content="'.$author_name.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="title" content="'.$title.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="fulltitle" content="'.$title.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="description" content="'.$description.'" />'."\n";
+
+       // Schema.org microdata
+       $a->page['htmlhead'] .= '<meta itemprop="name" content="'.$title.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta itemprop="description" content="'.$description.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta itemprop="image" content="'.$image.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta itemprop="author" content="'.$author_name.'" />'."\n";
+
+       // Twitter cards
+       $a->page['htmlhead'] .= '<meta name="twitter:card" content="summary" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="twitter:title" content="'.$title.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="twitter:description" content="'.$description.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="twitter:image" content="'.System::baseUrl().'/'.$image.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="twitter:url" content="'.$s[0]["plink"].'" />'."\n";
+
+       // Dublin Core
+       $a->page['htmlhead'] .= '<meta name="DC.title" content="'.$title.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="DC.description" content="'.$description.'" />'."\n";
+
+       // Open Graph
+       $a->page['htmlhead'] .= '<meta property="og:type" content="website" />'."\n";
+       $a->page['htmlhead'] .= '<meta property="og:title" content="'.$title.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta property="og:image" content="'.System::baseUrl().'/'.$image.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta property="og:url" content="'.$s[0]["plink"].'" />'."\n";
+       $a->page['htmlhead'] .= '<meta property="og:description" content="'.$description.'" />'."\n";
+       $a->page['htmlhead'] .= '<meta name="og:article:author" content="'.$author_name.'" />'."\n";
+       // article:tag
+
        return $o;
 }
 
+function displayShowFeed($item_id, $conversation) {
+       $xml = DFRN::itemFeed($item_id, $conversation);
+       if ($xml == '') {
+               http_status_exit(500);
+       }
+       header("Content-type: application/atom+xml");
+       echo $xml;
+       killme();
+}