codysnider / tt-rss

classes/article.php

<?php
class Article extends Handler_Protected {

    public function csrf_ignore($method) {
        $csrf_ignored = array("redirect", "editarticletags");

        return array_search($method, $csrf_ignored) !== false;
    }

    public function redirect() {
        $id = clean($_REQUEST['id']);

        $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 ($row = $sth->fetch()) {
            $article_url = $row['link'];
            $article_url = str_replace("\n", "", $article_url);

            header("Location: $article_url");
            return;

        } else {
            print_error(__("Article not found."));

The function print_error() has been deprecated: Use twig function errorMessage

        }
    }

    public static function create_published_article($title, $url, $content, $labels_str,
            $owner_uid) {

        $guid = 'SHA1:'.sha1("ttshared:".$url.$owner_uid); // include owner_uid to prevent global GUID clash

        if (!$content) {
            $pluginhost = new PluginHost();
            $pluginhost->load_all(PluginHost::KIND_ALL, $owner_uid);
            $pluginhost->load_data();

            foreach ($pluginhost->get_hooks(PluginHost::HOOK_GET_FULL_TEXT) as $p) {
                $extracted_content = $p->hook_get_full_text($url);

                if ($extracted_content) {
                    $content = $extracted_content;
                    break;
                }
            }
        }

        $content_hash = sha1($content);

        if ($labels_str != "") {
            $labels = explode(",", $labels_str);
        } else {
            $labels = array();
        }

        $rc = false;

        if (!$title) {
            $title = $url;
        }
        if (!$title && !$url) {
            return false;
        }

        if (filter_var($url, FILTER_VALIDATE_URL) === false) {
            return false;
        }

        $pdo = Db::pdo();

        $pdo->beginTransaction();

        // only check for our user data here, others might have shared this with different content etc
        $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 ($row = $sth->fetch()) {
            $ref_id = $row['id'];

            $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 ($row = $sth->fetch()) {
                $int_id = $row['int_id'];

                $sth = $pdo->prepare("UPDATE ttrss_entries SET
					content = ?, content_hash = ? WHERE id = ?");
                $sth->execute([$content, $content_hash, $ref_id]);

                if (DB_TYPE == "pgsql") {
                    $sth = $pdo->prepare("UPDATE ttrss_entries
					SET tsvector_combined = to_tsvector( :ts_content)
					WHERE id = :id");
                    $params = [
                        ":ts_content" => mb_substr(strip_tags($content), 0, 900000),
                        ":id" => $ref_id];
                    $sth->execute($params);
                }

                $sth = $pdo->prepare("UPDATE ttrss_user_entries SET published = true,
						last_published = NOW() WHERE
						int_id = ? AND owner_uid = ?");
                $sth->execute([$int_id, $owner_uid]);

            } else {

                $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
					(?, '', NULL, NULL, ?, true, '', '', NOW(), '', false, NOW())");
                $sth->execute([$ref_id, $owner_uid]);
            }

            if (count($labels) != 0) {
                foreach ($labels as $label) {
                    Labels::add_article($ref_id, trim($label), $owner_uid);
                }
            }

            $rc = true;

        } else {
            $sth = $pdo->prepare("INSERT INTO ttrss_entries
				(title, guid, link, updated, content, content_hash, date_entered, date_updated)
				VALUES
				(?, ?, ?, NOW(), ?, ?, NOW(), NOW())");
            $sth->execute([$title, $guid, $url, $content, $content_hash]);

            $sth = $pdo->prepare("SELECT id FROM ttrss_entries WHERE guid = ?");
            $sth->execute([$guid]);

            if ($row = $sth->fetch()) {
                $ref_id = $row["id"];
                if (DB_TYPE == "pgsql") {
                    $sth = $pdo->prepare("UPDATE ttrss_entries
					SET tsvector_combined = to_tsvector( :ts_content)
					WHERE id = :id");
                    $params = [
                        ":ts_content" => mb_substr(strip_tags($content), 0, 900000),
                        ":id" => $ref_id];
                    $sth->execute($params);
                }
                $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
					(?, '', NULL, NULL, ?, true, '', '', NOW(), '', false, NOW())");
                $sth->execute([$ref_id, $owner_uid]);

                if (count($labels) != 0) {
                    foreach ($labels as $label) {
                        Labels::add_article($ref_id, trim($label), $owner_uid);
                    }
                }

                $rc = true;
            }
        }

        $pdo->commit();

        return $rc;
    }

    public function editArticleTags() {

        $param = clean($_REQUEST['param']);

        $tags = Article::get_article_tags($param);

        $tags_str = join(", ", $tags);

        print_hidden("id", "$param");
        print_hidden("op", "article");
        print_hidden("method", "setArticleTags");

        print "<header class='horizontal'>".__("Tags for this article (separated by commas):")."</header>";

        print "<section>";
        print "<textarea dojoType='dijit.form.SimpleTextarea' rows='4'
			style='height : 100px; font-size : 12px; width : 98%' id='tags_str'
			name='tags_str'>$tags_str</textarea>
		<div class='autocomplete' id='tags_choices'
				style='display:none'></div>";
        print "</section>";

        print "<footer>";
        print "<button dojoType='dijit.form.Button'
			type='submit' class='alt-primary' onclick=\"dijit.byId('editTagsDlg').execute()\">".__('Save')."</button> ";
        print "<button dojoType='dijit.form.Button'
			onclick=\"dijit.byId('editTagsDlg').hide()\">".__('Cancel')."</button>";
        print "</footer>";

    }

    public function setScore() {
        $ids = explode(",", clean($_REQUEST['id']));
        $score = (int) clean($_REQUEST['score']);

        $ids_qmarks = arr_qmarks($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(["id" => $ids, "score" => (int) $score]);
    }

    public function getScore() {
        $id = clean($_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();

        $score = $row['score'];

        print json_encode(["id" => $id, "score" => (int) $score]);
    }


    public function setArticleTags() {

        $id = clean($_REQUEST["id"]);

        $tags_str = clean($_REQUEST["tags_str"]);
        $tags = array_unique(trim_array(explode(",", $tags_str)));

        $this->pdo->beginTransaction();

        $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 ($row = $sth->fetch()) {

            $tags_to_cache = array();

            $int_id = $row['int_id'];

            $sth = $this->pdo->prepare("DELETE FROM ttrss_tags WHERE
				post_int_id = ? AND owner_uid = ?");
            $sth->execute([$int_id, $_SESSION['uid']]);

            $tags = FeedItem_Common::normalize_categories($tags);

            foreach ($tags as $tag) {
                if ($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);
            }

            /* update tag cache */

            $tags_str = join(",", $tags_to_cache);

            $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->pdo->commit();

        $tags = Article::get_article_tags($id);
        $tags_str = $this->format_tags_string($tags);
        $tags_str_full = join(", ", $tags);

        if (!$tags_str_full) {
            $tags_str_full = __("no tags");
        }

        print json_encode([
            "id" => (int) $id,
            "content" => $tags_str,
            "content_full" => $tags_str_full
        ]);
    }


    public function completeTags() {
        $search = clean($_REQUEST["search"]);

        $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 = $sth->fetch()) {
            print "<li>".$line["tag_name"]."</li>";
        }
        print "</ul>";
    }

    public function assigntolabel() {
        return $this->labelops(true);
    }

    public function removefromlabel() {
        return $this->labelops(false);
    }

    private function labelops($assign) {
        $reply = array();

        $ids = explode(",", clean($_REQUEST["ids"]));
        $label_id = clean($_REQUEST["lid"]);

        $label = Labels::find_caption($label_id, $_SESSION["uid"]);

        $reply["info-for-headlines"] = array();

        if ($label) {

            foreach ($ids as $id) {

                if ($assign) {
                                    Labels::add_article($id, $label, $_SESSION["uid"]);
                } else {
                                    Labels::remove_article($id, $label, $_SESSION["uid"]);
                }

                $labels = $this->get_article_labels($id, $_SESSION["uid"]);

                array_push($reply["info-for-headlines"],
                array("id" => $id, "labels" => $this->format_article_labels($labels)));

            }
        }

        $reply["message"] = "UPDATE_COUNTERS";

        print json_encode($reply);
    }

    public function getArticleFeed($id) {
        $sth = $this->pdo->prepare("SELECT feed_id FROM ttrss_user_entries
			WHERE ref_id = ? AND owner_uid = ?");
        $sth->execute([$id, $_SESSION['uid']]);

        if ($row = $sth->fetch()) {
            return $row["feed_id"];
        } else {
            return 0;
        }
    }

    public static function format_article_enclosures($id, $always_display_enclosures,
                                        $article_content, $hide_images = false) {

        $result = Article::get_article_enclosures($id);
        $rv = '';

        foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_FORMAT_ENCLOSURES) as $plugin) {
            $retval = $plugin->hook_format_enclosures($rv, $result, $id, $always_display_enclosures, $article_content, $hide_images);
            if (is_array($retval)) {
                $rv = $retval[0];
                $result = $retval[1];
            } else {
                $rv = $retval;
            }
        }
        unset($retval); // Unset to prevent breaking render if there are no HOOK_RENDER_ENCLOSURE hooks below.

        if ($rv === '' && !empty($result)) {
            $entries_html = array();
            $entries = array();
            $entries_inline = array();

            foreach ($result as $line) {

                foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_ENCLOSURE_ENTRY) as $plugin) {
                    $line = $plugin->hook_enclosure_entry($line, $id);
                }

                $url = $line["content_url"];
                $ctype = $line["content_type"];
                $title = $line["title"];
                $width = $line["width"];
                $height = $line["height"];

                if (!$ctype) {
                    $ctype = __("unknown type");
                }

                //$filename = substr($url, strrpos($url, "/")+1);
                $filename = basename($url);

                $player = format_inline_player($url, $ctype);

                if ($player) {
                    array_push($entries_inline, $player);
                }

#				$entry .= " <a target=\"_blank\" href=\"" . htmlspecialchars($url) . "\" rel=\"noopener noreferrer\">" .
#					$filename . " (" . $ctype . ")" . "</a>";

                $entry = "<div onclick=\"popupOpenUrl('".htmlspecialchars($url)."')\"
					dojoType=\"dijit.MenuItem\">$filename ($ctype)</div>";

                array_push($entries_html, $entry);

                $entry = array();

                $entry["type"] = $ctype;
                $entry["filename"] = $filename;
                $entry["url"] = $url;
                $entry["title"] = $title;
                $entry["width"] = $width;
                $entry["height"] = $height;

                array_push($entries, $entry);
            }

            if ($_SESSION['uid'] && !get_pref("STRIP_IMAGES") && !$_SESSION["bw_limit"]) {
                if ($always_display_enclosures ||
                    !preg_match("/<img/i", $article_content)) {

                    foreach ($entries as $entry) {

                        foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_RENDER_ENCLOSURE) as $plugin) {
                                                    $retval = $plugin->hook_render_enclosure($entry, $hide_images);
                        }


                        if ($retval) {
                            $rv .= $retval;
                        } else {

                            if (preg_match("/image/", $entry["type"])) {

                                if (!$hide_images) {
                                    $encsize = '';
                                    if ($entry['height'] > 0) {
                                                                            $encsize .= ' height="'.intval($entry['height']).'"';
                                    }
                                    if ($entry['width'] > 0) {
                                                                            $encsize .= ' width="'.intval($entry['width']).'"';
                                    }
                                    $rv .= "<p><img
										alt=\"".htmlspecialchars($entry["filename"])."\"
										src=\"" .htmlspecialchars($entry["url"])."\"
										" . $encsize." /></p>";
                                } else {
                                    $rv .= "<p><a target=\"_blank\" rel=\"noopener noreferrer\"
										href=\"".htmlspecialchars($entry["url"])."\"
										>" .htmlspecialchars($entry["url"])."</a></p>";
                                }

                                if ($entry['title']) {
                                    $rv .= "<div class=\"enclosure_title\">${entry['title']}</div>";
                                }
                            }
                        }
                    }
                }
            }

            if (count($entries_inline) > 0) {
                //$rv .= "<hr clear='both'/>";
                foreach ($entries_inline as $entry) { $rv .= $entry; };
                $rv .= "<br clear='both'/>";
            }

            $rv .= "<div class=\"attachments\" dojoType=\"fox.form.DropDownButton\">".
                "<span>".__('Attachments')."</span>";

            $rv .= "<div dojoType=\"dijit.Menu\" style=\"display: none;\">";

            foreach ($entries as $entry) {
                if ($entry["title"]) {
                                    $title = " &mdash; ".truncate_string($entry["title"], 30);
                } else {
                                    $title = "";
                }

                if ($entry["filename"]) {
                                    $filename = truncate_middle(htmlspecialchars($entry["filename"]), 60);
                } else {
                                    $filename = "";
                }

                $rv .= "<div onclick='popupOpenUrl(\"".htmlspecialchars($entry["url"])."\")'
					dojoType=\"dijit.MenuItem\">".$filename.$title."</div>";

            };

            $rv .= "</div>";
            $rv .= "</div>";
        }

        return $rv;
    }

    public static function get_article_tags($id, $owner_uid = 0, $tag_cache = false) {

        $a_id = $id;

        if (!$owner_uid) {
            $owner_uid = $_SESSION["uid"];
        }

        $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) {
            $csth = $pdo->prepare("SELECT tag_cache FROM ttrss_user_entries
				WHERE ref_id = ? AND owner_uid = ?");
            $csth->execute([$id, $owner_uid]);

            if ($row = $csth->fetch()) {
                $tag_cache = $row["tag_cache"];
            }
        }

        if ($tag_cache) {
            $tags = explode(",", $tag_cache);
        } else {

            /* do it the hard way */

            $sth->execute([$a_id, $owner_uid]);

            while ($tmp_line = $sth->fetch()) {
                array_push($tags, $tmp_line["tag_name"]);
            }

            /* update the cache */

            $tags_str = join(",", $tags);

            $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;
    }

    public static function format_tags_string($tags) {
        if (!is_array($tags) || count($tags) == 0) {
            return __("no tags");
        } else {
            $maxtags = min(5, count($tags));
            $tags_str = "";

            for ($i = 0; $i < $maxtags; $i++) {
                $tags_str .= "<a class=\"tag\" href=\"#\" onclick=\"Feeds.open({feed:'".$tags[$i]."'})\">".$tags[$i]."</a>, ";
            }

            $tags_str = mb_substr($tags_str, 0, mb_strlen($tags_str) - 2);

            if (count($tags) > $maxtags) {
                            $tags_str .= ", &hellip;";
            }

            return $tags_str;
        }
    }

    public static function format_article_labels($labels) {

        if (!is_array($labels)) {
            return '';
        }

        $labels_str = "";

        foreach ($labels as $l) {
            $labels_str .= sprintf("<div class='label'
				style='color : %s; background-color : %s'>%s</div>",
                $l[2], $l[3], $l[1]);
        }

        return $labels_str;

    }

    public static function format_article_note($id, $note, $allow_edit = true) {

        if ($allow_edit) {
            $onclick = "onclick='Plugins.Note.edit($id)'";
            $note_class = 'editable';
        } else {
            $onclick = '';
            $note_class = '';
        }

        return "<div class='article-note $note_class'>
			<i class='material-icons'>note</i>
			<div $onclick class='body'>$note</div>
			</div>";
    }

    public static function get_article_enclosures($id) {

        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT * FROM ttrss_enclosures
			WHERE post_id = ? AND content_url != ''");
        $sth->execute([$id]);

        $rv = array();

        $cache = new DiskCache("images");

        while ($line = $sth->fetch()) {

            if ($cache->exists(sha1($line["content_url"]))) {
                $line["content_url"] = $cache->getUrl(sha1($line["content_url"]));
            }

            array_push($rv, $line);
        }

        return $rv;
    }

    public static function purge_orphans() {

        // purge orphaned posts in main content table

        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 (Debug::enabled()) {
            $rows = $res->rowCount();
            Debug::log("purged $rows orphaned posts.");
        }
    }

    public static function catchupArticlesById($ids, $cmode, $owner_uid = false) {

        if (!$owner_uid) {
            $owner_uid = $_SESSION["uid"];
        }

        $pdo = Db::pdo();

        $ids_qmarks = arr_qmarks($ids);

        if ($cmode == 1) {
            $sth = $pdo->prepare("UPDATE ttrss_user_entries SET
				unread = true
					WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
        } else if ($cmode == 2) {
            $sth = $pdo->prepare("UPDATE ttrss_user_entries SET
				unread = NOT unread,last_read = NOW()
					WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
        } else {
            $sth = $pdo->prepare("UPDATE ttrss_user_entries SET
				unread = false,last_read = NOW()
					WHERE ref_id IN ($ids_qmarks) AND owner_uid = ?");
        }

        $sth->execute(array_merge($ids, [$owner_uid]));

        /* update ccache */

        $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 = $sth->fetch()) {
            CCache::update($line["feed_id"], $owner_uid);
        }
    }

    public static function getLastArticleId() {
        $pdo = DB::pdo();

        $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;
        }
    }

    public static function get_article_labels($id, $owner_uid = false) {
        $rv = array();

        if (!$owner_uid) {
            $owner_uid = $_SESSION["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 ($row = $sth->fetch()) {
            $label_cache = $row["label_cache"];

            if ($label_cache) {
                $tmp = json_decode($label_cache, true);

                if (!$tmp || $tmp["no-labels"] == 1) {
                                    return $rv;
                } else {
                                    return $tmp;
                }
            }
        }

        $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 = ?
				AND owner_uid = ?
			ORDER BY caption");
        $sth->execute([$id, $owner_uid]);

        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($rv) > 0) {
                    Labels::update_cache($owner_uid, $id, $rv);
        } else {
                    Labels::update_cache($owner_uid, $id, array("no-labels" => 1));
        }

        return $rv;
    }

    public static function get_article_image($enclosures, $content, $site_url) {

        $article_image = "";
        $article_stream = "";

        foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_ARTICLE_IMAGE) as $p) {
            list ($article_image, $article_stream, $content) = $p->hook_article_image($enclosures, $content, $site_url);
        }

        if (!$article_image && !$article_stream) {
            $tmpdoc = new DOMDocument();

            if (@$tmpdoc->loadHTML('<?xml encoding="UTF-8">'.mb_substr($content, 0, 131070))) {
                $tmpxpath = new DOMXPath($tmpdoc);
                $elems = $tmpxpath->query('(//img[@src]|//video[@poster]|//iframe[contains(@src , "youtube.com/embed/")])');

                foreach ($elems as $e) {
                    if ($e->nodeName == "iframe") {
                        $matches = [];
                        if (preg_match("/\/embed\/([\w-]+)/", $e->getAttribute("src"), $matches)) {
                            $article_image = "https://img.youtube.com/vi/".$matches[1]."/hqdefault.jpg";
                            $article_stream = "https://youtu.be/".$matches[1];
                            break;
                        }
                    } else if ($e->nodeName == "video") {
                        $article_image = $e->getAttribute("poster");

                        $src = $tmpxpath->query("//source[@src]", $e)->item(0);

                        if ($src) {
                            $article_stream = $src->getAttribute("src");
                        }

                        break;
                    } else if ($e->nodeName == 'img') {
                        if (mb_strpos($e->getAttribute("src"), "data:") !== 0) {
                            $article_image = $e->getAttribute("src");
                        }
                        break;
                    }
                }
            }

            if (!$article_image) {
                            foreach ($enclosures as $enc) {
                    if (strpos($enc["content_type"], "image/") !== false) {
                        $article_image = $enc["content_url"];
            }
                        break;
                    }
                }

            if ($article_image) {
                            $article_image = rewrite_relative_url($site_url, $article_image);
            }

            if ($article_stream) {
                            $article_stream = rewrite_relative_url($site_url, $article_stream);
            }
        }

        $cache = new DiskCache("images");

        if ($article_image && $cache->exists(sha1($article_image))) {
                    $article_image = $cache->getUrl(sha1($article_image));
        }

        if ($article_stream && $cache->exists(sha1($article_stream))) {
                    $article_stream = $cache->getUrl(sha1($article_stream));
        }

        return [$article_image, $article_stream];
    }

}