]> git.wh0rd.org - tt-rss.git/blobdiff - classes/article.php
oops, remove useless db_escape_string() in article class (and nsfw plugin)
[tt-rss.git] / classes / article.php
old mode 100644 (file)
new mode 100755 (executable)
index 95f1704..075da19
@@ -8,14 +8,15 @@ class Article extends Handler_Protected {
        }
 
        function redirect() {
-               $id = $this->dbh->escape_string($_REQUEST['id']);
+               $id = clean($_REQUEST['id']);
 
-               $result = $this->dbh->query("SELECT link FROM ttrss_entries, ttrss_user_entries
-                                               WHERE id = '$id' AND id = ref_id AND owner_uid = '".$_SESSION['uid']."'
+               $sth = $this->pdo->prepare("SELECT link FROM ttrss_entries, ttrss_user_entries
+                                               WHERE id = ? AND id = ref_id AND owner_uid = ?
                                                LIMIT 1");
+        $sth->execute([$id, $_SESSION['uid']]);
 
-               if ($this->dbh->num_rows($result) == 1) {
-                       $article_url = $this->dbh->fetch_result($result, 0, 'link');
+               if ($row = $sth->fetch()) {
+                       $article_url = $row['link'];
                        $article_url = str_replace("\n", "", $article_url);
 
                        header("Location: $article_url");
@@ -27,9 +28,9 @@ class Article extends Handler_Protected {
        }
 
        function view() {
-               $id = $this->dbh->escape_string($_REQUEST["id"]);
-               $cids = explode(",", $this->dbh->escape_string($_REQUEST["cids"]));
-               $mode = $this->dbh->escape_string($_REQUEST["mode"]);
+               $id = clean($_REQUEST["id"]);
+               $cids = explode(",", clean($_REQUEST["cids"]));
+               $mode = clean($_REQUEST["mode"]);
 
                // in prefetch mode we only output requested cids, main article
                // just gets marked as read (it already exists in client cache)
@@ -43,7 +44,7 @@ class Article extends Handler_Protected {
                } else if ($mode == "raw") {
                        if (isset($_REQUEST['html'])) {
                                header("Content-Type: text/html");
-                               print '<link rel="stylesheet" type="text/css" href="css/tt-rss.css"/>';
+                               print '<link rel="stylesheet" type="text/css" href="css/default.css"/>';
                        }
 
                        $article = $this->format_article($id, false, isset($_REQUEST["zoom"]));
@@ -67,19 +68,21 @@ class Article extends Handler_Protected {
        private function catchupArticleById($id, $cmode) {
 
                if ($cmode == 0) {
-                       $this->dbh->query("UPDATE ttrss_user_entries SET
+                       $sth = $this->pdo->prepare("UPDATE ttrss_user_entries SET
                        unread = false,last_read = NOW()
-                       WHERE ref_id = '$id' AND owner_uid = " . $_SESSION["uid"]);
+                       WHERE ref_id = ? AND owner_uid = ?");
                } else if ($cmode == 1) {
-                       $this->dbh->query("UPDATE ttrss_user_entries SET
+            $sth = $this->pdo->prepare("UPDATE ttrss_user_entries SET
                        unread = true
-                       WHERE ref_id = '$id' AND owner_uid = " . $_SESSION["uid"]);
+                       WHERE ref_id = ? AND owner_uid = ?");
                } else {
-                       $this->dbh->query("UPDATE ttrss_user_entries SET
+            $sth = $this->pdo->prepare("UPDATE ttrss_user_entries SET
                        unread = NOT unread,last_read = NOW()
-                       WHERE ref_id = '$id' AND owner_uid = " . $_SESSION["uid"]);
+                       WHERE ref_id = ? AND owner_uid = ?");
                }
 
+               $sth->execute([$id, $_SESSION['uid']]);
+
                $feed_id = $this->getArticleFeed($id);
                CCache::update($feed_id, $_SESSION["uid"]);
        }
@@ -102,7 +105,7 @@ class Article extends Handler_Protected {
                                if ($enable_share_anything) {
                                        $extracted_content = $af_readability->extract_content($url);
 
-                                       if ($extracted_content) $content = db_escape_string($extracted_content);
+                                       if ($extracted_content) $content = $extracted_content;
                                }
                        }
                }
@@ -122,64 +125,75 @@ class Article extends Handler_Protected {
 
                if (filter_var($url, FILTER_VALIDATE_URL) === FALSE) return false;
 
-               db_query("BEGIN");
+               $pdo = Db::pdo();
+
+               $pdo->beginTransaction();
 
                // only check for our user data here, others might have shared this with different content etc
-               $result = db_query("SELECT id FROM ttrss_entries, ttrss_user_entries WHERE
-                       guid = '$guid' AND ref_id = id AND owner_uid = '$owner_uid' LIMIT 1");
+               $sth = $pdo->prepare("SELECT id FROM ttrss_entries, ttrss_user_entries WHERE
+                       guid = ? AND ref_id = id AND owner_uid = ? LIMIT 1");
+               $sth->execute([$guid, $owner_uid]);
 
-               if (db_num_rows($result) != 0) {
-                       $ref_id = db_fetch_result($result, 0, "id");
+               if ($row = $sth->fetch()) {
+                       $ref_id = $row['id'];
 
-                       $result = db_query("SELECT int_id FROM ttrss_user_entries WHERE
-                               ref_id = '$ref_id' AND owner_uid = '$owner_uid' LIMIT 1");
+                       $sth = $pdo->prepare("SELECT int_id FROM ttrss_user_entries WHERE
+                               ref_id = ? AND owner_uid = ? LIMIT 1");
+            $sth->execute([$ref_id, $owner_uid]);
 
-                       if (db_num_rows($result) != 0) {
-                               $int_id = db_fetch_result($result, 0, "int_id");
+                       if ($row = $sth->fetch()) {
+                               $int_id = $row['int_id'];
 
-                               db_query("UPDATE ttrss_entries SET
-                                       content = '$content', content_hash = '$content_hash' WHERE id = '$ref_id'");
+                               $sth = $pdo->prepare("UPDATE ttrss_entries SET
+                                       content = ?, content_hash = ? WHERE id = ?");
+                               $sth->execute([$content, $content_hash, $ref_id]);
 
-                               db_query("UPDATE ttrss_user_entries SET published = true,
+                               $sth = $pdo->prepare("UPDATE ttrss_user_entries SET published = true,
                                                last_published = NOW() WHERE
-                                               int_id = '$int_id' AND owner_uid = '$owner_uid'");
+                                               int_id = ? AND owner_uid = ?");
+                               $sth->execute([$int_id, $owner_uid]);
+
                        } else {
 
-                               db_query("INSERT INTO ttrss_user_entries
+                               $sth = $pdo->prepare("INSERT INTO ttrss_user_entries
                                        (ref_id, uuid, feed_id, orig_feed_id, owner_uid, published, tag_cache, label_cache,
                                                last_read, note, unread, last_published)
                                        VALUES
-                                       ('$ref_id', '', NULL, NULL, $owner_uid, true, '', '', NOW(), '', false, NOW())");
+                                       (?, '', NULL, NULL, ?, true, '', '', NOW(), '', false, NOW())");
+                               $sth->execute([$ref_id, $owner_uid]);
                        }
 
                        if (count($labels) != 0) {
                                foreach ($labels as $label) {
-                                       label_add_article($ref_id, trim($label), $owner_uid);
+                                       Labels::add_article($ref_id, trim($label), $owner_uid);
                                }
                        }
 
                        $rc = true;
 
                } else {
-                       $result = db_query("INSERT INTO ttrss_entries
+                       $sth = $pdo->prepare("INSERT INTO ttrss_entries
                                (title, guid, link, updated, content, content_hash, date_entered, date_updated)
                                VALUES
-                               ('$title', '$guid', '$url', NOW(), '$content', '$content_hash', NOW(), NOW())");
+                               (?, ?, ?, NOW(), ?, ?, NOW(), NOW())");
+                       $sth->execute([$title, $guid, $url, $content, $content_hash]);
 
-                       $result = db_query("SELECT id FROM ttrss_entries WHERE guid = '$guid'");
+                       $sth = $pdo->prepare("SELECT id FROM ttrss_entries WHERE guid = ?");
+                       $sth->execute([$guid]);
 
-                       if (db_num_rows($result) != 0) {
-                               $ref_id = db_fetch_result($result, 0, "id");
+                       if ($row = $sth->fetch()) {
+                               $ref_id = $row["id"];
 
-                               db_query("INSERT INTO ttrss_user_entries
+                               $sth = $pdo->prepare("INSERT INTO ttrss_user_entries
                                        (ref_id, uuid, feed_id, orig_feed_id, owner_uid, published, tag_cache, label_cache,
                                                last_read, note, unread, last_published)
                                        VALUES
-                                       ('$ref_id', '', NULL, NULL, $owner_uid, true, '', '', NOW(), '', false, NOW())");
+                                       (?, '', NULL, NULL, ?, true, '', '', NOW(), '', false, NOW())");
+                               $sth->execute([$ref_id, $owner_uid]);
 
                                if (count($labels) != 0) {
                                        foreach ($labels as $label) {
-                                               label_add_article($ref_id, trim($label), $owner_uid);
+                                               Labels::add_article($ref_id, trim($label), $owner_uid);
                                        }
                                }
 
@@ -187,7 +201,7 @@ class Article extends Handler_Protected {
                        }
                }
 
-               db_query("COMMIT");
+               $pdo->commit();
 
                return $rc;
        }
@@ -196,9 +210,9 @@ class Article extends Handler_Protected {
 
                print __("Tags for this article (separated by commas):")."<br>";
 
-               $param = $this->dbh->escape_string($_REQUEST['param']);
+               $param = clean($_REQUEST['param']);
 
-               $tags = Article::get_article_tags($this->dbh->escape_string($param));
+               $tags = Article::get_article_tags($param);
 
                $tags_str = join(", ", $tags);
 
@@ -227,11 +241,15 @@ class Article extends Handler_Protected {
        }
 
        function setScore() {
-               $ids = $this->dbh->escape_string($_REQUEST['id']);
-               $score = (int)$this->dbh->escape_string($_REQUEST['score']);
+               $ids = explode(",", clean($_REQUEST['id']));
+               $score = (int)clean($_REQUEST['score']);
 
-               $this->dbh->query("UPDATE ttrss_user_entries SET
-                       score = '$score' WHERE ref_id IN ($ids) AND owner_uid = " . $_SESSION["uid"]);
+               $ids_qmarks = arr_qmarks($ids);
+
+               $sth = $this->pdo->prepare("UPDATE ttrss_user_entries SET
+                       score = ? WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
+
+               $sth->execute(array_merge([$score], $ids, [$_SESSION['uid']]));
 
                print json_encode(array("id" => $ids,
                        "score" => (int)$score,
@@ -239,10 +257,13 @@ class Article extends Handler_Protected {
        }
 
        function getScore() {
-               $id = $this->dbh->escape_string($_REQUEST['id']);
+               $id = clean($_REQUEST['id']);
+
+               $sth = $this->pdo->prepare("SELECT score FROM ttrss_user_entries WHERE ref_id = ? AND owner_uid = ?");
+               $sth->execute([$id, $_SESSION['uid']]);
+               $row = $sth->fetch();
 
-               $result = $this->dbh->query("SELECT score FROM ttrss_user_entries WHERE ref_id = $id AND owner_uid = " . $_SESSION["uid"]);
-               $score = $this->dbh->fetch_result($result, 0, "score");
+               $score = $row['score'];
 
                print json_encode(array("id" => $id,
                        "score" => (int)$score,
@@ -252,24 +273,26 @@ class Article extends Handler_Protected {
 
        function setArticleTags() {
 
-               $id = $this->dbh->escape_string($_REQUEST["id"]);
+               $id = clean($_REQUEST["id"]);
 
-               $tags_str = $this->dbh->escape_string($_REQUEST["tags_str"]);
+               $tags_str = clean($_REQUEST["tags_str"]);
                $tags = array_unique(trim_array(explode(",", $tags_str)));
 
-               $this->dbh->query("BEGIN");
+               $this->pdo->beginTransaction();
 
-               $result = $this->dbh->query("SELECT int_id FROM ttrss_user_entries WHERE
-                               ref_id = '$id' AND owner_uid = '".$_SESSION["uid"]."' LIMIT 1");
+               $sth = $this->pdo->prepare("SELECT int_id FROM ttrss_user_entries WHERE
+                               ref_id = ? AND owner_uid = ? LIMIT 1");
+               $sth->execute([$id, $_SESSION['uid']]);
 
-               if ($this->dbh->num_rows($result) == 1) {
+               if ($row = $sth->fetch()) {
 
                        $tags_to_cache = array();
 
-                       $int_id = $this->dbh->fetch_result($result, 0, "int_id");
+                       $int_id = $row['int_id'];
 
-                       $this->dbh->query("DELETE FROM ttrss_tags WHERE
-                               post_int_id = $int_id AND owner_uid = '".$_SESSION["uid"]."'");
+                       $sth = $this->pdo->prepare("DELETE FROM ttrss_tags WHERE
+                               post_int_id = ? AND owner_uid = ?");
+                       $sth->execute([$int_id, $_SESSION['uid']]);
 
                        foreach ($tags as $tag) {
                                $tag = sanitize_tag($tag);
@@ -285,8 +308,11 @@ class Article extends Handler_Protected {
                                //                                      print "<!-- $id : $int_id : $tag -->";
 
                                if ($tag != '') {
-                                       $this->dbh->query("INSERT INTO ttrss_tags
-                                                               (post_int_id, owner_uid, tag_name) VALUES ('$int_id', '".$_SESSION["uid"]."', '$tag')");
+                                       $sth = $this->pdo->prepare("INSERT INTO ttrss_tags
+                                                               (post_int_id, owner_uid, tag_name)
+                                                               VALUES (?, ?, ?)");
+
+                                       $sth->execute([$int_id, $_SESSION['uid'], $tag]);
                                }
 
                                array_push($tags_to_cache, $tag);
@@ -297,12 +323,12 @@ class Article extends Handler_Protected {
                        sort($tags_to_cache);
                        $tags_str = join(",", $tags_to_cache);
 
-                       $this->dbh->query("UPDATE ttrss_user_entries
-                               SET tag_cache = '$tags_str' WHERE ref_id = '$id'
-                                               AND owner_uid = " . $_SESSION["uid"]);
+                       $sth = $this->pdo->prepare("UPDATE ttrss_user_entries
+                               SET tag_cache = ? WHERE ref_id = ? AND owner_uid = ?");
+                       $sth->execute([$tags_str, $id, $_SESSION['uid']]);
                }
 
-               $this->dbh->query("COMMIT");
+               $this->pdo->commit();
 
                $tags = Article::get_article_tags($id);
                $tags_str = $this->format_tags_string($tags, $id);
@@ -316,15 +342,17 @@ class Article extends Handler_Protected {
 
 
        function completeTags() {
-               $search = $this->dbh->escape_string($_REQUEST["search"]);
+               $search = clean($_REQUEST["search"]);
 
-               $result = $this->dbh->query("SELECT DISTINCT tag_name FROM ttrss_tags
-                               WHERE owner_uid = '".$_SESSION["uid"]."' AND
-                               tag_name LIKE '$search%' ORDER BY tag_name
+               $sth = $this->pdo->prepare("SELECT DISTINCT tag_name FROM ttrss_tags
+                               WHERE owner_uid = ? AND
+                               tag_name LIKE ? ORDER BY tag_name
                                LIMIT 10");
 
+               $sth->execute([$_SESSION['uid'], "$search%"]);
+
                print "<ul>";
-               while ($line = $this->dbh->fetch_assoc($result)) {
+               while ($line = $sth->fetch()) {
                        print "<li>" . $line["tag_name"] . "</li>";
                }
                print "</ul>";
@@ -341,11 +369,10 @@ class Article extends Handler_Protected {
        private function labelops($assign) {
                $reply = array();
 
-               $ids = explode(",", $this->dbh->escape_string($_REQUEST["ids"]));
-               $label_id = $this->dbh->escape_string($_REQUEST["lid"]);
+               $ids = explode(",", clean($_REQUEST["ids"]));
+               $label_id = clean($_REQUEST["lid"]);
 
-               $label = $this->dbh->escape_string(label_find_caption($label_id,
-               $_SESSION["uid"]));
+               $label = Labels::find_caption($label_id, $_SESSION["uid"]);
 
                $reply["info-for-headlines"] = array();
 
@@ -354,9 +381,9 @@ class Article extends Handler_Protected {
                        foreach ($ids as $id) {
 
                                if ($assign)
-                                       label_add_article($id, $label, $_SESSION["uid"]);
+                                       Labels::add_article($id, $label, $_SESSION["uid"]);
                                else
-                                       label_remove_article($id, $label, $_SESSION["uid"]);
+                                       Labels::remove_article($id, $label, $_SESSION["uid"]);
 
                                $labels = $this->get_article_labels($id, $_SESSION["uid"]);
 
@@ -372,11 +399,12 @@ class Article extends Handler_Protected {
        }
 
        function getArticleFeed($id) {
-               $result = db_query("SELECT feed_id FROM ttrss_user_entries
-                       WHERE ref_id = '$id' AND owner_uid = " . $_SESSION["uid"]);
+               $sth = $this->pdo->prepare("SELECT feed_id FROM ttrss_user_entries
+                       WHERE ref_id = ? AND owner_uid = ?");
+               $sth->execute([$id, $_SESSION['uid']]);
 
-               if (db_num_rows($result) != 0) {
-                       return db_fetch_result($result, 0, "feed_id");
+               if ($row = $sth->fetch()) {
+                       return $row["feed_id"];
                } else {
                        return 0;
                }
@@ -530,24 +558,29 @@ class Article extends Handler_Protected {
                /* we can figure out feed_id from article id anyway, why do we
                 * pass feed_id here? let's ignore the argument :(*/
 
-               $result = db_query("SELECT feed_id FROM ttrss_user_entries
-                       WHERE ref_id = '$id'");
+               $pdo = Db::pdo();
+
+               $sth = $pdo->prepare("SELECT feed_id FROM ttrss_user_entries
+                       WHERE ref_id = ?");
+               $sth->execute([$id]);
+               $row = $sth->fetch();
 
-               $feed_id = (int) db_fetch_result($result, 0, "feed_id");
+               $feed_id = (int) $row["feed_id"];
 
                $rv['feed_id'] = $feed_id;
 
                //if (!$zoom_mode) { print "<article id='$id'><![CDATA["; };
 
                if ($mark_as_read) {
-                       $result = db_query("UPDATE ttrss_user_entries
+                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                SET unread = false,last_read = NOW()
-                               WHERE ref_id = '$id' AND owner_uid = $owner_uid");
+                               WHERE ref_id = ? AND owner_uid = ?");
+                       $sth->execute([$id, $owner_uid]);
 
                        CCache::update($feed_id, $owner_uid);
                }
 
-               $result = db_query("SELECT id,title,link,content,feed_id,comments,int_id,lang,
+               $sth = $pdo->prepare("SELECT id,title,link,content,feed_id,comments,int_id,lang,
                        ".SUBSTRING_FOR_DATE."(updated,1,16) as updated,
                        (SELECT site_url FROM ttrss_feeds WHERE id = feed_id) as site_url,
                        (SELECT title FROM ttrss_feeds WHERE id = feed_id) as feed_title,
@@ -560,23 +593,24 @@ class Article extends Handler_Protected {
                        orig_feed_id,
                        note
                        FROM ttrss_entries,ttrss_user_entries
-                       WHERE   id = '$id' AND ref_id = id AND owner_uid = $owner_uid");
+                       WHERE   id = ? AND ref_id = id AND owner_uid = ?");
+               $sth->execute([$id, $owner_uid]);
 
-               if ($result) {
-
-                       $line = db_fetch_assoc($result);
+               if ($line = $sth->fetch()) {
 
                        $line["tags"] = Article::get_article_tags($id, $owner_uid, $line["tag_cache"]);
                        unset($line["tag_cache"]);
 
                        $line["content"] = sanitize($line["content"],
-                               sql_bool_to_bool($line['hide_images']),
+                               $line['hide_images'],
                                $owner_uid, $line["site_url"], false, $line["id"]);
 
                        foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_RENDER_ARTICLE) as $p) {
                                $line = $p->hook_render_article($line);
                        }
 
+                       $line['content'] = rewrite_cached_urls($line['content']);
+
                        $num_comments = (int) $line["num_comments"];
                        $entry_comments = "";
 
@@ -596,19 +630,52 @@ class Article extends Handler_Protected {
                                }
                        }
 
+                       $enclosures = self::get_article_enclosures($line["id"]);
+
                        if ($zoom_mode) {
                                header("Content-Type: text/html");
-                               $rv['content'] .= "<html><head>
+                               $rv['content'] .= "<!DOCTYPE html>
+                                               <html><head>
                                                <meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/>
-                                               <title>Tiny Tiny RSS - ".$line["title"]."</title>".
-                                       stylesheet_tag("css/tt-rss.css").
-                                       stylesheet_tag("css/zoom.css").
-                                       stylesheet_tag("css/dijit.css")."
-
+                                               <title>".$line["title"]."</title>".
+                                               stylesheet_tag("css/default.css")."
                                                <link rel=\"shortcut icon\" type=\"image/png\" href=\"images/favicon.png\">
-                                               <link rel=\"icon\" type=\"image/png\" sizes=\"72x72\" href=\"images/favicon-72px.png\">
+                                               <link rel=\"icon\" type=\"image/png\" sizes=\"72x72\" href=\"images/favicon-72px.png\">";
+
+                               $rv['content'] .= "<meta property=\"og:title\" content=\"".htmlspecialchars($line["title"])."\"/>\n";
+                               $rv['content'] .= "<meta property=\"og:site_name\" content=\"".htmlspecialchars($line["feed_title"])."\"/>\n";
+                               $rv['content'] .= "<meta property=\"og:description\" content=\"".
+                                       htmlspecialchars(truncate_string(strip_tags($line["content"]), 500, "..."))."\"/>\n";
+
+                               $rv['content'] .= "</head>";
 
-                                       </head><body id=\"ttrssZoom\">";
+                               $og_image = false;
+
+                               foreach ($enclosures as $enc) {
+                                       if (strpos($enc["content_type"], "image/") !== FALSE) {
+                                               $og_image = $enc["content_url"];
+                                               break;
+                                       }
+                               }
+
+                               if (!$og_image) {
+                                       $tmpdoc = new DOMDocument();
+
+                                       if (@$tmpdoc->loadHTML(mb_substr($line["content"], 0, 131070))) {
+                                               $tmpxpath = new DOMXPath($tmpdoc);
+                                               $first_img = $tmpxpath->query("//img")->item(0);
+
+                                               if ($first_img) {
+                                                       $og_image = $first_img->getAttribute("src");
+                                               }
+                                       }
+                               }
+
+                               if ($og_image) {
+                                       $rv['content'] .= "<meta property=\"og:image\" content=\"" . htmlspecialchars($og_image) . "\"/>";
+                               }
+
+                               $rv['content'] .= "<body class=\"claro ttrss_utility ttrss_zoom\">";
                        }
 
                        $rv['content'] .= "<div class=\"postReply\" id=\"POST-$id\">";
@@ -685,18 +752,17 @@ class Article extends Handler_Protected {
 
                        if ($line["orig_feed_id"]) {
 
-                               $tmp_result = db_query("SELECT * FROM ttrss_archived_feeds
-                                       WHERE id = ".$line["orig_feed_id"] . " AND owner_uid = " . $_SESSION["uid"]);
+                               $of_sth = $pdo->prepare("SELECT * FROM ttrss_archived_feeds
+                                       WHERE id = ? AND owner_uid = ?");
+                               $of_sth->execute([$line["orig_feed_id"], $owner_uid]);
 
-                               if (db_num_rows($tmp_result) != 0) {
+                               if ($tmp_line = $of_sth->fetch()) {
 
                                        $rv['content'] .= "<div clear='both'>";
                                        $rv['content'] .= __("Originally from:");
 
                                        $rv['content'] .= "&nbsp;";
 
-                                       $tmp_line = db_fetch_assoc($tmp_result);
-
                                        $rv['content'] .= "<a target='_blank' rel='noopener noreferrer'
                                                href=' " . htmlspecialchars($tmp_line['site_url']) . "'>" .
                                                $tmp_line['title'] . "</a>";
@@ -726,9 +792,9 @@ class Article extends Handler_Protected {
 
                        if (!$zoom_mode) {
                                $rv['content'] .= Article::format_article_enclosures($id,
-                                       sql_bool_to_bool($line["always_display_enclosures"]),
+                                       $line["always_display_enclosures"],
                                        $line["content"],
-                                       sql_bool_to_bool($line["hide_images"]));
+                                       $line["hide_images"]);
                        }
 
                        $rv['content'] .= "</div>";
@@ -745,31 +811,37 @@ class Article extends Handler_Protected {
                        $rv['content'] .= "</body></html>";
                }
 
+               foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_FORMAT_ARTICLE) as $p) {
+                       $rv['content'] = $p->hook_format_article($rv['content'], $line, $zoom_mode);
+               }
+
                return $rv;
 
        }
 
        static function get_article_tags($id, $owner_uid = 0, $tag_cache = false) {
 
-               $a_id = db_escape_string($id);
+               $a_id = $id;
 
                if (!$owner_uid) $owner_uid = $_SESSION["uid"];
 
-               $query = "SELECT DISTINCT tag_name,
-                       owner_uid as owner FROM
-                       ttrss_tags WHERE post_int_id = (SELECT int_id FROM ttrss_user_entries WHERE
-                       ref_id = '$a_id' AND owner_uid = '$owner_uid' LIMIT 1) ORDER BY tag_name";
+               $pdo = Db::pdo();
+
+               $sth = $pdo->prepare("SELECT DISTINCT tag_name,
+                       owner_uid as owner FROM ttrss_tags
+                       WHERE post_int_id = (SELECT int_id FROM ttrss_user_entries WHERE
+                       ref_id = ? AND owner_uid = ? LIMIT 1) ORDER BY tag_name");
 
                $tags = array();
 
                /* check cache first */
 
                if ($tag_cache === false) {
-                       $result = db_query("SELECT tag_cache FROM ttrss_user_entries
-                               WHERE ref_id = '$id' AND owner_uid = $owner_uid");
+                       $csth = $pdo->prepare("SELECT tag_cache FROM ttrss_user_entries
+                               WHERE ref_id = ? AND owner_uid = ?");
+                       $csth->execute([$id, $owner_uid]);
 
-                       if (db_num_rows($result) != 0)
-                               $tag_cache = db_fetch_result($result, 0, "tag_cache");
+                       if ($row = $csth->fetch()) $tag_cache = $row["tag_cache"];
                }
 
                if ($tag_cache) {
@@ -778,19 +850,20 @@ class Article extends Handler_Protected {
 
                        /* do it the hard way */
 
-                       $tmp_result = db_query($query);
+                       $sth->execute([$a_id, $owner_uid]);
 
-                       while ($tmp_line = db_fetch_assoc($tmp_result)) {
+                       while ($tmp_line = $sth->fetch()) {
                                array_push($tags, $tmp_line["tag_name"]);
                        }
 
                        /* update the cache */
 
-                       $tags_str = db_escape_string(join(",", $tags));
+                       $tags_str = join(",", $tags);
 
-                       db_query("UPDATE ttrss_user_entries
-                               SET tag_cache = '$tags_str' WHERE ref_id = '$id'
-                               AND owner_uid = $owner_uid");
+                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
+                               SET tag_cache = ? WHERE ref_id = ?
+                               AND owner_uid = ?");
+                       $sth->execute([$tags_str, $id, $owner_uid]);
                }
 
                return $tags;
@@ -843,22 +916,21 @@ class Article extends Handler_Protected {
 
        static function get_article_enclosures($id) {
 
-               $query = "SELECT * FROM ttrss_enclosures
-                       WHERE post_id = '$id' AND content_url != ''";
+               $pdo = Db::pdo();
 
-               $rv = array();
+               $sth = $pdo->prepare("SELECT * FROM ttrss_enclosures
+                       WHERE post_id = ? AND content_url != ''");
+               $sth->execute([$id]);
 
-               $result = db_query($query);
-
-               if (db_num_rows($result) > 0) {
-                       while ($line = db_fetch_assoc($result)) {
+               $rv = array();
 
-                               if (file_exists(CACHE_DIR . '/images/' . sha1($line["content_url"]))) {
-                                       $line["content_url"] = get_self_url_prefix() . '/public.php?op=cached_url&hash=' . sha1($line["content_url"]);
-                               }
+               while ($line = $sth->fetch()) {
 
-                               array_push($rv, $line);
+                       if (file_exists(CACHE_DIR . '/images/' . sha1($line["content_url"]))) {
+                               $line["content_url"] = get_self_url_prefix() . '/public.php?op=cached_url&hash=' . sha1($line["content_url"]);
                        }
+
+                       array_push($rv, $line);
                }
 
                return $rv;
@@ -867,11 +939,18 @@ class Article extends Handler_Protected {
        static function purge_orphans($do_output = false) {
 
                // purge orphaned posts in main content table
-               $result = db_query("DELETE FROM ttrss_entries WHERE
-                       NOT EXISTS (SELECT ref_id FROM ttrss_user_entries WHERE ref_id = id)");
+
+               if (DB_TYPE == "mysql")
+                       $limit_qpart = "LIMIT 5000";
+               else
+                       $limit_qpart = "";
+
+               $pdo = Db::pdo();
+               $res = $pdo->query("DELETE FROM ttrss_entries WHERE
+                       NOT EXISTS (SELECT ref_id FROM ttrss_user_entries WHERE ref_id = id) $limit_qpart");
 
                if ($do_output) {
-                       $rows = db_affected_rows($result);
+                       $rows = $res->rowCount();
                        _debug("Purged $rows orphaned posts.");
                }
        }
@@ -879,46 +958,47 @@ class Article extends Handler_Protected {
        static function catchupArticlesById($ids, $cmode, $owner_uid = false) {
 
                if (!$owner_uid) $owner_uid = $_SESSION["uid"];
-               if (count($ids) == 0) return;
 
-               $tmp_ids = array();
+               $pdo = Db::pdo();
 
-               foreach ($ids as $id) {
-                       array_push($tmp_ids, "ref_id = '$id'");
-               }
-
-               $ids_qpart = join(" OR ", $tmp_ids);
+               $ids_qmarks = arr_qmarks($ids);
 
                if ($cmode == 0) {
-                       db_query("UPDATE ttrss_user_entries SET
+                       $sth = $pdo->prepare("UPDATE ttrss_user_entries SET
                        unread = false,last_read = NOW()
-                       WHERE ($ids_qpart) AND owner_uid = $owner_uid");
+                               WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
                } else if ($cmode == 1) {
-                       db_query("UPDATE ttrss_user_entries SET
+                       $sth = $pdo->prepare("UPDATE ttrss_user_entries SET
                        unread = true
-                       WHERE ($ids_qpart) AND owner_uid = $owner_uid");
+                               WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
                } else {
-                       db_query("UPDATE ttrss_user_entries SET
-                       unread = NOT unread,last_read = NOW()
-                       WHERE ($ids_qpart) AND owner_uid = $owner_uid");
+                       $sth = $pdo->prepare("UPDATE ttrss_user_entries SET
+                               unread = NOT unread,last_read = NOW()
+                                       WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
                }
 
+               $sth->execute(array_merge($ids, [$owner_uid]));
+
                /* update ccache */
 
-               $result = db_query("SELECT DISTINCT feed_id FROM ttrss_user_entries
-                       WHERE ($ids_qpart) AND owner_uid = $owner_uid");
+               $sth = $pdo->prepare("SELECT DISTINCT feed_id FROM ttrss_user_entries
+                       WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
+               $sth->execute(array_merge($ids, [$owner_uid]));
 
-               while ($line = db_fetch_assoc($result)) {
+               while ($line = $sth->fetch()) {
                        CCache::update($line["feed_id"], $owner_uid);
                }
        }
 
        static function getLastArticleId() {
-               $result = db_query("SELECT ref_id AS id FROM ttrss_user_entries
-                       WHERE owner_uid = " . $_SESSION["uid"] . " ORDER BY ref_id DESC LIMIT 1");
+               $pdo = DB::pdo();
 
-               if (db_num_rows($result) == 1) {
-                       return db_fetch_result($result, 0, "id");
+               $sth = $pdo->prepare("SELECT ref_id AS id FROM ttrss_user_entries
+                       WHERE owner_uid = ? ORDER BY ref_id DESC LIMIT 1");
+               $sth->execute([$_SESSION['uid']]);
+
+               if ($row = $sth->fetch()) {
+                       return $row['id'];
                } else {
                        return -1;
                }
@@ -929,42 +1009,44 @@ class Article extends Handler_Protected {
 
                if (!$owner_uid) $owner_uid = $_SESSION["uid"];
 
-               $result = db_query("SELECT label_cache FROM
-                       ttrss_user_entries WHERE ref_id = '$id' AND owner_uid = " .
-                       $owner_uid);
+               $pdo = Db::pdo();
+
+               $sth = $pdo->prepare("SELECT label_cache FROM
+                       ttrss_user_entries WHERE ref_id = ? AND owner_uid = ?");
+               $sth->execute([$id, $owner_uid]);
 
-               if (db_num_rows($result) > 0) {
-                       $label_cache = db_fetch_result($result, 0, "label_cache");
+               if ($row = $sth->fetch()) {
+                       $label_cache = $row["label_cache"];
 
                        if ($label_cache) {
-                               $label_cache = json_decode($label_cache, true);
+                               $tmp = json_decode($label_cache, true);
 
-                               if ($label_cache["no-labels"] == 1)
+                               if (!$tmp || $tmp["no-labels"] == 1)
                                        return $rv;
                                else
-                                       return $label_cache;
+                                       return $tmp;
                        }
                }
 
-               $result = db_query(
-                       "SELECT DISTINCT label_id,caption,fg_color,bg_color
+               $sth = $pdo->prepare("SELECT DISTINCT label_id,caption,fg_color,bg_color
                                FROM ttrss_labels2, ttrss_user_labels2
                        WHERE id = label_id
-                               AND article_id = '$id'
-                               AND owner_uid = ". $owner_uid . "
+                               AND article_id = ?
+                               AND owner_uid = ?
                        ORDER BY caption");
+               $sth->execute([$id, $owner_uid]);
 
-               while ($line = db_fetch_assoc($result)) {
-                       $rk = array(label_to_feed_id($line["label_id"]),
+               while ($line = $sth->fetch()) {
+                       $rk = array(Labels::label_to_feed_id($line["label_id"]),
                                $line["caption"], $line["fg_color"],
                                $line["bg_color"]);
                        array_push($rv, $rk);
                }
 
                if (count($rv) > 0)
-                       label_update_cache($owner_uid, $id, $rv);
+                       Labels::update_cache($owner_uid, $id, $rv);
                else
-                       label_update_cache($owner_uid, $id, array("no-labels" => 1));
+                       Labels::update_cache($owner_uid, $id, array("no-labels" => 1));
 
                return $rv;
        }