codysnider / tt-rss

classes/feeds.php

<?php
require_once "colors.php";

class Feeds extends Handler_Protected {
    const NEVER_GROUP_FEEDS = [ -6, 0];
    const NEVER_GROUP_BY_DATE = [ -2, -1, -3];

    private $params;

    function csrf_ignore($method) {
        $csrf_ignored = array("index", "quickaddfeed", "search");

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

    private function format_headline_subtoolbar($feed_site_url, $feed_title,
            $feed_id, $is_cat, $search,
            $error, $feed_last_updated) {

        if ($is_cat) {
            $cat_q = "&is_cat=$is_cat";
        }

        if ($search) {
            $search_q = "&q=$search";
        } else {
            $search_q = "";
        }

        $reply = "";

        $rss_link = htmlspecialchars(get_self_url_prefix().
            "/public.php?op=rss&id=$feed_id$cat_q$search_q");

The variable $cat_q does not seem to be defined for all execution paths leading up to this point.

        $reply .= "<span class='left'>";

        $reply .= "<a href=\"#\"
				title=\"".__("Show as feed")."\"
				onclick=\"App.displayDlg('".__("Show as feed")."','generatedFeed', '$feed_id:$is_cat:$rss_link')\">
				<i class='icon-syndicate material-icons'>rss_feed</i></a>";

        $reply .= "<span id='feed_title'>";

        if ($feed_site_url) {
            $last_updated = T_sprintf("Last updated: %s", $feed_last_updated);

            $reply .= "<a title=\"$last_updated\" target='_blank' href=\"$feed_site_url\">".
                truncate_string(strip_tags($feed_title), 30)."</a>";
        } else {
            $reply .= strip_tags($feed_title);
        }

        if ($error) {
                    $reply .= " <i title=\"".htmlspecialchars($error)."\" class='material-icons icon-error'>error</i>";
        }

        $reply .= "</span>";
        $reply .= "<span id='feed_current_unread' style='display: none'></span>";
        $reply .= "</span>";

        $reply .= "<span class=\"right\">";
        $reply .= "<span id='selected_prompt'></span>";
        $reply .= "&nbsp;";
        $reply .= "<select dojoType=\"fox.form.Select\"
			onchange=\"Headlines.onActionChanged(this)\">";

        $reply .= "<option value=\"0\" disabled='1'>".__('Select...')."</option>";

        $reply .= "<option value=\"Headlines.select('all')\">".__('All')."</option>";
        $reply .= "<option value=\"Headlines.select('unread')\">".__('Unread')."</option>";
        $reply .= "<option value=\"Headlines.select('invert')\">".__('Invert')."</option>";
        $reply .= "<option value=\"Headlines.select('none')\">".__('None')."</option>";

        $reply .= "<option value=\"0\" disabled=\"1\">".__('Selection toggle:')."</option>";

        $reply .= "<option value=\"Headlines.selectionToggleUnread()\">".__('Unread')."</option>
			<option value=\"Headlines.selectionToggleMarked()\">".__('Starred')."</option>
			<option value=\"Headlines.selectionTogglePublished()\">".__('Published')."</option>";

        $reply .= "<option value=\"0\" disabled=\"1\">".__('Selection:')."</option>";

        $reply .= "<option value=\"Headlines.catchupSelection()\">".__('Mark as read')."</option>";
        $reply .= "<option value=\"Article.selectionSetScore()\">".__('Set score')."</option>";

        if ($feed_id == 0 && !$is_cat) {
            $reply .= "<option value=\"Headlines.archiveSelection()\">".__('Move back')."</option>";
            $reply .= "<option value=\"Headlines.deleteSelection()\">".__('Delete')."</option>";
        } else {
            $reply .= "<option value=\"Headlines.archiveSelection()\">".__('Archive')."</option>";
        }

        if (PluginHost::getInstance()->get_plugin("mail")) {
            $reply .= "<option value=\"Plugins.Mail.send()\">".__('Forward by email').
                "</option>";
        }

        if (PluginHost::getInstance()->get_plugin("mailto")) {
            $reply .= "<option value=\"Plugins.Mailto.send()\">".__('Forward by email').
                "</option>";
        }

        $reply .= "<option value=\"0\" disabled=\"1\">".__('Feed:')."</option>";

        //$reply .= "<option value=\"catchupPage()\">".__('Mark as read')."</option>";

        $reply .= "<option value=\"App.displayDlg('".__("Show as feed")."','generatedFeed', '$feed_id:$is_cat:$rss_link')\">".
            __('Show as feed')."</option>";

        $reply .= "</select>";

        //$reply .= "</h2";

        foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_HEADLINE_TOOLBAR_BUTTON) as $p) {
                $reply .= $p->hook_headline_toolbar_button($feed_id, $is_cat);
        }

        $reply .= "</span>";

        return $reply;
    }

    private function format_headlines_list($feed, $method, $view_mode, $limit, $cat_view,
                    $offset, $override_order = false, $include_children = false, $check_first_id = false,
                    $skip_first_id_check = false, $order_by = false) {

        $disable_cache = false;

        $reply = array();

        $rgba_cache = array();
        $topmost_article_ids = array();

        if (!$offset) {
            $offset = 0;
        }
        if ($method == "undefined") {
            $method = "";
        }

        $method_split = explode(":", $method);

        if ($method == "ForceUpdate" && $feed > 0 && is_numeric($feed)) {
            $sth = $this->pdo->prepare("UPDATE ttrss_feeds
                            SET last_updated = '1970-01-01', last_update_started = '1970-01-01'
                            WHERE id = ?");
            $sth->execute([$feed]);
        }

        if ($method_split[0] == "MarkAllReadGR") {
            $this->catchup_feed($method_split[1], false);
        }

        // FIXME: might break tag display?

        if (is_numeric($feed) && $feed > 0 && !$cat_view) {
            $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds WHERE id = ? LIMIT 1");
            $sth->execute([$feed]);

            if (!$sth->fetch()) {
                $reply['content'] = "<div align='center'>".__('Feed not found.')."</div>";
            }
        }

        @$search = $_REQUEST["query"];
        @$search_language = $_REQUEST["search_language"]; // PGSQL only

        if ($search) {
            $disable_cache = true;
        }

        if (!$cat_view && is_numeric($feed) && $feed < PLUGIN_FEED_BASE_INDEX && $feed > LABEL_BASE_INDEX) {
            $handler = PluginHost::getInstance()->get_feed_handler(
                PluginHost::feed_to_pfeed_id($feed));

            if ($handler) {
                $options = array(
                    "limit" => $limit,
                    "view_mode" => $view_mode,
                    "cat_view" => $cat_view,
                    "search" => $search,
                    "override_order" => $override_order,
                    "offset" => $offset,
                    "owner_uid" => $_SESSION["uid"],
                    "filter" => false,
                    "since_id" => 0,
                    "include_children" => $include_children,
                    "order_by" => $order_by);

                $qfh_ret = $handler->get_headlines(PluginHost::feed_to_pfeed_id($feed),
                    $options);
            }

        } else {

            $params = array(
                "feed" => $feed,
                "limit" => $limit,
                "view_mode" => $view_mode,
                "cat_view" => $cat_view,
                "search" => $search,
                "search_language" => $search_language,
                "override_order" => $override_order,
                "offset" => $offset,
                "include_children" => $include_children,
                "check_first_id" => $check_first_id,
                "skip_first_id_check" => $skip_first_id_check,
                "order_by" => $order_by
            );

            $qfh_ret = $this->queryFeedHeadlines($params);
        }

        $vfeed_group_enabled = get_pref("VFEED_GROUP_BY_FEED") &&
            !(in_array($feed, Feeds::NEVER_GROUP_FEEDS) && !$cat_view);

        $result = $qfh_ret[0]; // this could be either a PDO query result or a -1 if first id changed

The variable $qfh_ret does not seem to be defined for all execution paths leading up to this point.

        $feed_title = $qfh_ret[1];
        $feed_site_url = $qfh_ret[2];
        $last_error = $qfh_ret[3];
        $last_updated = strpos($qfh_ret[4], '1970-') === false ?
            make_local_datetime($qfh_ret[4], false) : __("Never");
        $highlight_words = $qfh_ret[5];
        $reply['first_id'] = $qfh_ret[6];
        $reply['is_vfeed'] = $qfh_ret[7];
        $query_error_override = $qfh_ret[8];

        $reply['search_query'] = [$search, $search_language];
        $reply['vfeed_group_enabled'] = $vfeed_group_enabled;

        $reply['toolbar'] = $this->format_headline_subtoolbar($feed_site_url,
            $feed_title,
            $feed, $cat_view, $search,
            $last_error, $last_updated);

        if ($offset == 0) {
            foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_HEADLINES_BEFORE) as $p) {
                    $reply['content'] .= $p->hook_headlines_before($feed, $cat_view, $qfh_ret);
            }
        }

        $reply['content'] = [];

        $headlines_count = 0;

        if (is_object($result)) {
            while ($line = $result->fetch(PDO::FETCH_ASSOC)) {

                ++$headlines_count;

                if (!get_pref('SHOW_CONTENT_PREVIEW')) {
                    $line["content_preview"] = "";
                } else {
                    $line["content_preview"] = "— ".truncate_string(strip_tags($line["content"]), 250);

                    foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_QUERY_HEADLINES) as $p) {
                        $line = $p->hook_query_headlines($line, 250, false);
                    }
                }

                $id = $line["id"];

                // frontend doesn't expect pdo returning booleans as strings on mysql
                if (DB_TYPE == "mysql") {

The constant DB_TYPE was not found. Maybe you did not declare it correctly or list all dependencies?

                    foreach (["unread", "marked", "published"] as $k) {
                        $line[$k] = $line[$k] === "1";
                    }
                }

                // normalize archived feed
                if ($line['feed_id'] === null) {
                    $line['feed_id'] = 0;
                    $line["feed_title"] = __("Archived articles");
                }

                $feed_id = $line["feed_id"];

                $label_cache = $line["label_cache"];
                $labels = false;

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

                    if ($label_cache) {
                        if ($label_cache["no-labels"] == 1) {
                                                    $labels = array();
                        } else {
                                                    $labels = $label_cache;
                        }
                    }
                }

                if (!is_array($labels)) {
                    $labels = Article::get_article_labels($id);
                }

                $labels_str = "<span class=\"HLLCTR-$id\">";
                $labels_str .= Article::format_article_labels($labels);
                $labels_str .= "</span>";

                $line["labels"] = $labels_str;

                if (count($topmost_article_ids) < 3) {
                    array_push($topmost_article_ids, $id);
                }

                if (!$line["feed_title"]) {
                    $line["feed_title"] = "";
                }

                $line["buttons_left"] = "";
                foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_ARTICLE_LEFT_BUTTON) as $p) {
                    $line["buttons_left"] .= $p->hook_article_left_button($line);
                }

                $line["buttons"] = "";
                foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_ARTICLE_BUTTON) as $p) {
                    $line["buttons"] .= $p->hook_article_button($line);
                }

                $line["content"] = sanitize($line["content"],
                    $line['hide_images'], false, $line["site_url"], $highlight_words, $line["id"]);

                foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_RENDER_ARTICLE_CDM) as $p) {
                    $line = $p->hook_render_article_cdm($line);
                }

                $line['content'] = DiskCache::rewriteUrls($line['content']);

                if ($line['note']) {
                                    $line['note'] = Article::format_article_note($id, $line['note']);
                } else {
                                    $line['note'] = "";
                }

                if (!get_pref("CDM_EXPANDED")) {
                    $line["cdm_excerpt"] = "<span class='collapse'>
                        <i class='material-icons' onclick='return Article.cdmUnsetActive(event)'
                            title=\"" . __("Collapse article")."\">remove_circle</i></span>";

                    if (get_pref('SHOW_CONTENT_PREVIEW')) {
                        $line["cdm_excerpt"] .= "<span class='excerpt'>".$line["content_preview"]."</span>";
                    }
                }

                $line["enclosures"] = Article::format_article_enclosures($id, $line["always_display_enclosures"],
                    $line["content"], $line["hide_images"]);

                if ($line["orig_feed_id"]) {

                    $ofgh = $this->pdo->prepare("SELECT * FROM ttrss_archived_feeds
                    WHERE id = ? AND owner_uid = ?");
                    $ofgh->execute([$line["orig_feed_id"], $_SESSION['uid']]);

                    if ($tmp_line = $ofgh->fetch()) {
                        $line["orig_feed"] = [$tmp_line["title"], $tmp_line["site_url"], $tmp_line["feed_url"]];
                    }
                }

                $line["updated_long"] = make_local_datetime($line["updated"], true);
                $line["updated"] = make_local_datetime($line["updated"], false, false, false, true);


                $line['imported'] = T_sprintf("Imported at %s",
                    make_local_datetime($line["date_entered"], false));

                if ($line["tag_cache"]) {
                                    $tags = explode(",", $line["tag_cache"]);
                } else {
                                    $tags = false;
                }

                $line["tags_str"] = Article::format_tags_string($tags);

                if (feeds::feedHasIcon($feed_id)) {
                    $line['feed_icon'] = "<img class=\"icon\" src=\"".ICONS_URL."/$feed_id.ico\" alt=\"\">";

The constant ICONS_URL was not found. Maybe you did not declare it correctly or list all dependencies?

                } else {
                    $line['feed_icon'] = "<i class='icon-no-feed material-icons'>rss_feed</i>";
                }

                //setting feed headline background color, needs to change text color based on dark/light
                $fav_color = $line['favicon_avg_color'];

                require_once "colors.php";

                if (!isset($rgba_cache[$feed_id])) {
                    if ($fav_color && $fav_color != 'fail') {
                        $rgba_cache[$feed_id] = _color_unpack($fav_color);
                    } else {
                        $rgba_cache[$feed_id] = _color_unpack($this->color_of($line['feed_title']));
                    }
                }

                if (isset($rgba_cache[$feed_id])) {
                    $line['feed_bg_color'] = 'rgba('.implode(",", $rgba_cache[$feed_id]).',0.3)';
                }

                /* we don't need those */

                foreach (["date_entered", "guid", "last_published", "last_marked", "tag_cache", "favicon_avg_color",
                                "uuid", "label_cache", "yyiw"] as $k) {
                                    unset($line[$k]);
                }

                array_push($reply['content'], $line);
            }
        }

        if (!$headlines_count) {

            if (is_object($result)) {

                if ($query_error_override) {
                    $message = $query_error_override;
                } else {
                    switch ($view_mode) {
                    case "unread":
                        $message = __("No unread articles found to display.");
                        break;
                    case "updated":
                        $message = __("No updated articles found to display.");
                        break;
                    case "marked":
                        $message = __("No starred articles found to display.");
                        break;
                    default:
                        if ($feed < LABEL_BASE_INDEX) {
                            $message = __("No articles found to display. You can assign articles to labels manually from article header context menu (applies to all selected articles) or use a filter.");
                        } else {
                            $message = __("No articles found to display.");
                        }
                    }
                }

                if (!$offset && $message) {
                    $reply['content'] = "<div class='whiteBox'>$message";

                    $reply['content'] .= "<p><span class=\"text-muted\">";

                    $sth = $this->pdo->prepare("SELECT ".SUBSTRING_FOR_DATE."(MAX(last_updated), 1, 19) AS last_updated FROM ttrss_feeds
                        WHERE owner_uid = ?");
                    $sth->execute([$_SESSION['uid']]);
                    $row = $sth->fetch();

                    $last_updated = make_local_datetime($row["last_updated"], false);

                    $reply['content'] .= sprintf(__("Feeds last updated at %s"), $last_updated);

                    $sth = $this->pdo->prepare("SELECT COUNT(id) AS num_errors
                        FROM ttrss_feeds WHERE last_error != '' AND owner_uid = ?");
                    $sth->execute([$_SESSION['uid']]);
                    $row = $sth->fetch();

                    $num_errors = $row["num_errors"];

                    if ($num_errors > 0) {
                        $reply['content'] .= "<br/>";
                        $reply['content'] .= "<a class=\"text-muted\" href=\"#\" onclick=\"CommonDialogs.showFeedsWithErrors()\">".
                            __('Some feeds have update errors (click for details)')."</a>";
                    }
                    $reply['content'] .= "</span></p></div>";

                }
            } else if (is_numeric($result) && $result == -1) {
                $reply['first_id_changed'] = true;
            }
        }

        return array($topmost_article_ids, $headlines_count, $feed, $disable_cache, $reply);
    }

    public function catchupAll() {
        $sth = $this->pdo->prepare("UPDATE ttrss_user_entries SET
						last_read = NOW(), unread = false WHERE unread = true AND owner_uid = ?");
        $sth->execute([$_SESSION['uid']]);

        CCache::zero_all($_SESSION["uid"]);
    }

    public function view() {
        $reply = array();

        $feed = $_REQUEST["feed"];
        $method = $_REQUEST["m"];
        $view_mode = $_REQUEST["view_mode"];
        $limit = 30;
        @$cat_view = $_REQUEST["cat"] == "true";
        @$next_unread_feed = $_REQUEST["nuf"];
        @$offset = $_REQUEST["skip"];
        $order_by = $_REQUEST["order_by"];
        $check_first_id = $_REQUEST["fid"];

        if (is_numeric($feed)) {
            $feed = (int) $feed;
        }

        /* Feed -5 is a special case: it is used to display auxiliary information
		 * when there's nothing to load - e.g. no stuff in fresh feed */

        if ($feed == -5) {
            print json_encode($this->generate_dashboard_feed());
            return;
        }

        $sth = false;
        if ($feed < LABEL_BASE_INDEX) {

            $label_feed = Labels::feed_to_label_id($feed);

            $sth = $this->pdo->prepare("SELECT id FROM ttrss_labels2 WHERE
							id = ? AND owner_uid = ?");
            $sth->execute([$label_feed, $_SESSION['uid']]);

        } else if (!$cat_view && is_numeric($feed) && $feed > 0) {

            $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds WHERE
							id = ? AND owner_uid = ?");
            $sth->execute([$feed, $_SESSION['uid']]);

        } else if ($cat_view && is_numeric($feed) && $feed > 0) {

            $sth = $this->pdo->prepare("SELECT id FROM ttrss_feed_categories WHERE
							id = ? AND owner_uid = ?");

            $sth->execute([$feed, $_SESSION['uid']]);
        }

        if ($sth && !$sth->fetch()) {
            print json_encode($this->generate_error_feed(__("Feed not found.")));
            return;
        }

        /* Updating a label ccache means recalculating all of the caches
		 * so for performance reasons we don't do that here */

        if ($feed >= 0) {
            CCache::update($feed, $_SESSION["uid"], $cat_view);
        }

        set_pref("_DEFAULT_VIEW_MODE", $view_mode);
        set_pref("_DEFAULT_VIEW_ORDER_BY", $order_by);

        /* bump login timestamp if needed */
        if (time() - $_SESSION["last_login_update"] > 3600) {
            $sth = $this->pdo->prepare("UPDATE ttrss_users SET last_login = NOW() WHERE id = ?");
            $sth->execute([$_SESSION['uid']]);

            $_SESSION["last_login_update"] = time();
        }

        if (!$cat_view && is_numeric($feed) && $feed > 0) {
            $sth = $this->pdo->prepare("UPDATE ttrss_feeds SET last_viewed = NOW()
							WHERE id = ? AND owner_uid = ?");
            $sth->execute([$feed, $_SESSION['uid']]);
        }

        $reply['headlines'] = [];

        $override_order = false;
        $skip_first_id_check = false;

        switch ($order_by) {
        case "title":
            $override_order = "ttrss_entries.title, date_entered, updated";
            break;
        case "date_reverse":
            $override_order = "score DESC, date_entered, updated";
            $skip_first_id_check = true;
            break;
        case "feed_dates":
            $override_order = "updated DESC";
            break;
        }

        $ret = $this->format_headlines_list($feed, $method,
            $view_mode, $limit, $cat_view, $offset,
            $override_order, true, $check_first_id, $skip_first_id_check, $order_by);

        $headlines_count = $ret[1];
        $disable_cache = $ret[3];
        $reply['headlines'] = $ret[4];

        if (!$next_unread_feed) {
                    $reply['headlines']['id'] = $feed;
        } else {
                    $reply['headlines']['id'] = $next_unread_feed;
        }

        $reply['headlines']['is_cat'] = (bool) $cat_view;

        $reply['headlines-info'] = ["count" => (int) $headlines_count,
                                    "disable_cache" => (bool) $disable_cache];

        // this is parsed by handleRpcJson() on first viewfeed() to set cdm expanded, etc
        $reply['runtime-info'] = make_runtime_info();

        $reply_json = json_encode($reply);

        if (!$reply_json) {
            $reply_json = json_encode(["error" => ["code" => 15,
                "message" => json_last_error_msg()]]);
        }

        print $reply_json;

    }

    private function generate_dashboard_feed() {
        $reply = array();

        $reply['headlines']['id'] = -5;
        $reply['headlines']['is_cat'] = false;

        $reply['headlines']['toolbar'] = '';

        $reply['headlines']['content'] = "<div class='whiteBox'>".__('No feed selected.');

        $reply['headlines']['content'] .= "<p><span class=\"text-muted\">";

        $sth = $this->pdo->prepare("SELECT ".SUBSTRING_FOR_DATE."(MAX(last_updated), 1, 19) AS last_updated FROM ttrss_feeds
			WHERE owner_uid = ?");
        $sth->execute([$_SESSION['uid']]);
        $row = $sth->fetch();

        $last_updated = make_local_datetime($row["last_updated"], false);

        $reply['headlines']['content'] .= sprintf(__("Feeds last updated at %s"), $last_updated);

        $sth = $this->pdo->prepare("SELECT COUNT(id) AS num_errors
			FROM ttrss_feeds WHERE last_error != '' AND owner_uid = ?");
        $sth->execute([$_SESSION['uid']]);
        $row = $sth->fetch();

        $num_errors = $row["num_errors"];

        if ($num_errors > 0) {
            $reply['headlines']['content'] .= "<br/>";
            $reply['headlines']['content'] .= "<a class=\"text-muted\" href=\"#\" onclick=\"CommonDialogs.showFeedsWithErrors()\">".
                __('Some feeds have update errors (click for details)')."</a>";
        }
        $reply['headlines']['content'] .= "</span></p>";

        $reply['headlines-info'] = array("count" => 0,
            "unread" => 0,
            "disable_cache" => true);

        return $reply;
    }

    private function generate_error_feed($error) {
        $reply = array();

        $reply['headlines']['id'] = -7;
        $reply['headlines']['is_cat'] = false;

        $reply['headlines']['toolbar'] = '';
        $reply['headlines']['content'] = "<div class='whiteBox'>".$error."</div>";

        $reply['headlines-info'] = array("count" => 0,
            "unread" => 0,
            "disable_cache" => true);

        return $reply;
    }

    public function quickAddFeed() {
        print "<form onsubmit='return false'>";

        print_hidden("op", "rpc");
        print_hidden("method", "addfeed");

        print "<div id='fadd_error_message' style='display : none' class='alert alert-danger'></div>";

        print "<div id='fadd_multiple_notify' style='display : none'>";
        print_notice("Provided URL is a HTML page referencing multiple feeds, please select required feed from the dropdown menu below.");

The call to print_notice() has too many arguments starting with 'Provided URL is a HTML page referencing multiple feeds, please select required feed from the dropdown menu below.'.

The function print_notice() has been deprecated: Use twig function noticeMessage

        print "<p></div>";

        print "<section>";

        print "<fieldset>";
        print "<div style='float : right'><img style='display : none' id='feed_add_spinner' src='images/indicator_white.gif'></div>";
        print "<input style='font-size : 16px; width : 500px;'
			placeHolder=\"".__("Feed or site URL")."\"
			dojoType='dijit.form.ValidationTextBox' required='1' name='feed' id='feedDlg_feedUrl'>";

        print "</fieldset>";

        print "<fieldset>";

        if (get_pref('ENABLE_FEED_CATS')) {
            print "<label class='inline'>".__('Place in category:')."</label> ";
            print_feed_cat_select("cat", false, 'dojoType="fox.form.Select"');
        }

        print "</fieldset>";

        print "</section>";

        print '<div id="feedDlg_feedsContainer" style="display : none">
				<header>' . __('Available feeds').'</header>
				<section>
					<fieldset>
						<select id="feedDlg_feedContainerSelect"
							dojoType="fox.form.Select" size="3">
							<script type="dojo/method" event="onChange" args="value">
								dijit.byId("feedDlg_feedUrl").attr("value", value);
							</script>
						</select>
					</fieldset>
				</section>
			</div>';

        print "<div id='feedDlg_loginContainer' style='display : none'>
				<section>
				<fieldset>
					<input dojoType=\"dijit.form.TextBox\" name='login'\"
						placeHolder=\"".__("Login")."\"
						autocomplete=\"new-password\"
						style=\"width : 10em;\">
					<input
						placeHolder=\"".__("Password")."\"
						dojoType=\"dijit.form.TextBox\" type='password'
						autocomplete=\"new-password\"
						style=\"width : 10em;\" name='pass'\">
				</fieldset>
				</section>
			</div>";

        print "<section>";
        print "<label>
			<label class='checkbox'><input type='checkbox' name='need_auth' dojoType='dijit.form.CheckBox' id='feedDlg_loginCheck'
					onclick='displayIfChecked(this, \"feedDlg_loginContainer\")'>
				".__('This feed requires authentication.')."</label>";
        print "</section>";

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

        print "<button dojoType='dijit.form.Button' onclick=\"return dijit.byId('feedAddDlg').hide()\">".__('Cancel')."</button>";
        print "</footer>";

        print "</form>";
    }

    public function search() {
        $this->params = explode(":", $_REQUEST["param"], 2);

        $active_feed_id = sprintf("%d", $this->params[0]);
        $is_cat = $this->params[1] != "false";

        print "<form onsubmit='return false;'>";

        print "<section>";

        print "<fieldset>";
        print "<input dojoType='dijit.form.ValidationTextBox' id='search_query'
			style='font-size : 16px; width : 540px;'
			placeHolder=\"".T_sprintf("Search %s...", $this->getFeedTitle($active_feed_id, $is_cat))."\"
			name='query' type='search' value=''>";
        print "</fieldset>";

        if (DB_TYPE == "pgsql") {

The constant DB_TYPE was not found. Maybe you did not declare it correctly or list all dependencies?

            print "<fieldset>";
            print "<label class='inline'>".__("Language:")."</label>";
            print_select("search_language", get_pref('DEFAULT_SEARCH_LANGUAGE'), Pref_Feeds::get_ts_languages(),
                "dojoType='fox.form.Select' title=\"".__('Used for word stemming')."\"");
            print "</fieldset>";
        }

        print "</section>";

        print "<footer>";

        if (count(PluginHost::getInstance()->get_hooks(PluginHost::HOOK_SEARCH)) == 0) {
            print "<button dojoType='dijit.form.Button' style='float : left' class='alt-info' onclick='window.open(\"https://tt-rss.org/wiki/SearchSyntax\")'>
				<i class='material-icons'>help</i> ".__("Search syntax")."</button>";
        }

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

        print "</footer>";

        print "</form>";
    }

    public function update_debugger() {
        header("Content-type: text/html");

        Debug::set_enabled(true);
        Debug::set_loglevel($_REQUEST["xdebug"]);

        $feed_id = (int) $_REQUEST["feed_id"];
        @$do_update = $_REQUEST["action"] == "do_update";
        $csrf_token = $_REQUEST["csrf_token"];

        $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds WHERE id = ? AND owner_uid = ?");
        $sth->execute([$feed_id, $_SESSION['uid']]);

        if (!$sth->fetch()) {
            print "Access denied.";
            return;
        }

        $refetch_checked = isset($_REQUEST["force_refetch"]) ? "checked" : "";
        $rehash_checked = isset($_REQUEST["force_rehash"]) ? "checked" : "";

        ?>
		<!DOCTYPE html>
		<html>
		<head>
			<?php echo stylesheet_tag("css/default.css") ?>

Are you sure the usage of stylesheet_tag('css/default.css') is correct as it seems to always return null.

The function stylesheet_tag() has been deprecated: Use Twig filter cssTag

			<title>Feed Debugger</title>
			<?php
                echo stylesheet_tag("css/default.css");

The function stylesheet_tag() has been deprecated: Use Twig filter cssTag

Are you sure the usage of stylesheet_tag('css/default.css') is correct as it seems to always return null.

                echo javascript_tag("lib/prototype.js");

Are you sure the usage of javascript_tag('lib/prototype.js') is correct as it seems to always return null.

The function javascript_tag() has been deprecated: Use Twig filter jsTag

                echo javascript_tag("lib/dojo/dojo.js");

Are you sure the usage of javascript_tag('lib/dojo/dojo.js') is correct as it seems to always return null.

The function javascript_tag() has been deprecated: Use Twig filter jsTag

                echo javascript_tag("lib/dojo/tt-rss-layer.js");

The function javascript_tag() has been deprecated: Use Twig filter jsTag

Are you sure the usage of javascript_tag('lib/dojo/tt-rss-layer.js') is correct as it seems to always return null.

            ?>
		</head>
		<body class="flat ttrss_utility feed_debugger">
		<script type="text/javascript">
			require(['dojo/parser', "dojo/ready", 'dijit/form/Button','dijit/form/CheckBox', 'dijit/form/Form',
				'dijit/form/Select','dijit/form/TextBox','dijit/form/ValidationTextBox'],function(parser, ready){
				ready(function() {
					parser.parse();
				});
			});
		</script>

			<div class="container">
				<h1>Feed Debugger: <?php echo "$feed_id: ".$this->getFeedTitle($feed_id) ?></h1>
				<div class="content">
					<form method="GET" action="">
						<input type="hidden" name="op" value="feeds">
						<input type="hidden" name="method" value="update_debugger">
						<input type="hidden" name="xdebug" value="1">
						<input type="hidden" name="csrf_token" value="<?php echo $csrf_token ?>">
						<input type="hidden" name="action" value="do_update">
						<input type="hidden" name="feed_id" value="<?php echo $feed_id ?>">

						<fieldset class="narrow">
							<label class="checkbox"><input dojoType="dijit.form.CheckBox" type="checkbox" name="force_refetch" value="1" <?php echo $refetch_checked ?>> Force refetch</label>
						</fieldset>

						<fieldset class="narrow">
							<label class="checkbox"><input dojoType="dijit.form.CheckBox" type="checkbox" name="force_rehash" value="1" <?php echo $rehash_checked ?>> Force rehash</label>
						</fieldset>

						<button type="submit" dojoType="dijit.form.Button" class="alt-primary">Continue</button>
					</form>

					<hr>

					<pre><?php

                    if ($do_update) {
                        RSSUtils::update_rss_feed($feed_id, true);
                    }

                    ?></pre>
				</div>
			</div>
		</body>
		</html>
		<?php

    }

    public static function catchup_feed($feed, $cat_view, $owner_uid = false, $mode = 'all', $search = false) {

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

        $pdo = Db::pdo();

        if (is_array($search) && $search[0]) {
            $search_qpart = "";

            foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_SEARCH) as $plugin) {
                list($search_qpart, $search_words) = $plugin->hook_search($search[0]);
                break;
            }

            // fall back in case of no plugins
            if (!$search_qpart) {
                list($search_qpart, $search_words) = Feeds::search_to_sql($search[0], $search[1]);
            }
        } else {
            $search_qpart = "true";
        }

        // TODO: all this interval stuff needs some generic generator function

        switch ($mode) {
        case "1day":
            if (DB_TYPE == "pgsql") {

The constant DB_TYPE was not found. Maybe you did not declare it correctly or list all dependencies?

                $date_qpart = "date_entered < NOW() - INTERVAL '1 day' ";
            } else {
                $date_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 1 DAY) ";
            }
            break;
        case "1week":
            if (DB_TYPE == "pgsql") {
                $date_qpart = "date_entered < NOW() - INTERVAL '1 week' ";
            } else {
                $date_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 1 WEEK) ";
            }
            break;
        case "2week":
            if (DB_TYPE == "pgsql") {
                $date_qpart = "date_entered < NOW() - INTERVAL '2 week' ";
            } else {
                $date_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 2 WEEK) ";
            }
            break;
        default:
            $date_qpart = "true";
        }

        if (is_numeric($feed)) {
            if ($cat_view) {

                if ($feed >= 0) {

                    if ($feed > 0) {
                        $children = Feeds::getChildCategories($feed, $owner_uid);
                        array_push($children, $feed);
                        $children = array_map("intval", $children);

                        $children = join(",", $children);

                        $cat_qpart = "cat_id IN ($children)";
                    } else {
                        $cat_qpart = "cat_id IS NULL";
                    }

                    $sth = $pdo->prepare("UPDATE ttrss_user_entries
						SET unread = false, last_read = NOW() WHERE ref_id IN
							(SELECT id FROM
								(SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
									AND owner_uid = ? AND unread = true AND feed_id IN
										(SELECT id FROM ttrss_feeds WHERE $cat_qpart) AND $date_qpart AND $search_qpart) as tmp)");
                    $sth->execute([$owner_uid]);

                } else if ($feed == -2) {

                    $sth = $pdo->prepare("UPDATE ttrss_user_entries
						SET unread = false,last_read = NOW() WHERE (SELECT COUNT(*)
							FROM ttrss_user_labels2, ttrss_entries WHERE article_id = ref_id AND id = ref_id AND $date_qpart AND $search_qpart) > 0
							AND unread = true AND owner_uid = ?");
                    $sth->execute([$owner_uid]);
                }

            } else if ($feed > 0) {

                $sth = $pdo->prepare("UPDATE ttrss_user_entries
					SET unread = false, last_read = NOW() WHERE ref_id IN
						(SELECT id FROM
							(SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
								AND owner_uid = ? AND unread = true AND feed_id = ? AND $date_qpart AND $search_qpart) as tmp)");
                $sth->execute([$owner_uid, $feed]);

            } else if ($feed < 0 && $feed > LABEL_BASE_INDEX) { // special, like starred

                if ($feed == -1) {
                    $sth = $pdo->prepare("UPDATE ttrss_user_entries
						SET unread = false, last_read = NOW() WHERE ref_id IN
							(SELECT id FROM
								(SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
									AND owner_uid = ? AND unread = true AND marked = true AND $date_qpart AND $search_qpart) as tmp)");
                    $sth->execute([$owner_uid]);
                }

                if ($feed == -2) {
                    $sth = $pdo->prepare("UPDATE ttrss_user_entries
						SET unread = false, last_read = NOW() WHERE ref_id IN
							(SELECT id FROM
								(SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
									AND owner_uid = ? AND unread = true AND published = true AND $date_qpart AND $search_qpart) as tmp)");
                    $sth->execute([$owner_uid]);
                }

                if ($feed == -3) {

                    $intl = (int) get_pref("FRESH_ARTICLE_MAX_AGE");

                    if (DB_TYPE == "pgsql") {
                        $match_part = "date_entered > NOW() - INTERVAL '$intl hour' ";
                    } else {
                        $match_part = "date_entered > DATE_SUB(NOW(),
							INTERVAL $intl HOUR) ";
                    }

                    $sth = $pdo->prepare("UPDATE ttrss_user_entries
						SET unread = false, last_read = NOW() WHERE ref_id IN
							(SELECT id FROM
								(SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
									AND owner_uid = ? AND score >= 0 AND unread = true AND $date_qpart AND $match_part AND $search_qpart) as tmp)");
                    $sth->execute([$owner_uid]);
                }

                if ($feed == -4) {
                    $sth = $pdo->prepare("UPDATE ttrss_user_entries
						SET unread = false, last_read = NOW() WHERE ref_id IN
							(SELECT id FROM
								(SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
									AND owner_uid = ? AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
                    $sth->execute([$owner_uid]);
                }

            } else if ($feed < LABEL_BASE_INDEX) { // label

                $label_id = Labels::feed_to_label_id($feed);

                $sth = $pdo->prepare("UPDATE ttrss_user_entries
					SET unread = false, last_read = NOW() WHERE ref_id IN
						(SELECT id FROM
							(SELECT DISTINCT ttrss_entries.id FROM ttrss_entries, ttrss_user_entries, ttrss_user_labels2 WHERE ref_id = id
								AND label_id = ? AND ref_id = article_id
								AND owner_uid = ? AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
                $sth->execute([$label_id, $owner_uid]);

            }

            CCache::update($feed, $owner_uid, $cat_view);

        } else { // tag
            $sth = $pdo->prepare("UPDATE ttrss_user_entries
				SET unread = false, last_read = NOW() WHERE ref_id IN
					(SELECT id FROM
						(SELECT DISTINCT ttrss_entries.id FROM ttrss_entries, ttrss_user_entries, ttrss_tags WHERE ref_id = ttrss_entries.id
							AND post_int_id = int_id AND tag_name = ?
							AND ttrss_user_entries.owner_uid = ? AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
            $sth->execute([$feed, $owner_uid]);

        }
    }

    public static function getFeedArticles($feed, $is_cat = false, $unread_only = false,
                                $owner_uid = false) {

        $n_feed = (int) $feed;
        $need_entries = false;

        $pdo = Db::pdo();

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

        if ($unread_only) {
            $unread_qpart = "unread = true";
        } else {
            $unread_qpart = "true";
        }

        $match_part = "";

        if ($is_cat) {
            return Feeds::getCategoryUnread($n_feed, $owner_uid);
        } else if ($n_feed == -6) {
            return 0;
        } else if ($feed != "0" && $n_feed == 0) {

            $sth = $pdo->prepare("SELECT SUM((SELECT COUNT(int_id)
				FROM ttrss_user_entries,ttrss_entries WHERE int_id = post_int_id
					AND ref_id = id AND $unread_qpart)) AS count FROM ttrss_tags
				WHERE owner_uid = ? AND tag_name = ?");

            $sth->execute([$owner_uid, $feed]);
            $row = $sth->fetch();

            return $row["count"];

        } else if ($n_feed == -1) {
            $match_part = "marked = true";
        } else if ($n_feed == -2) {
            $match_part = "published = true";
        } else if ($n_feed == -3) {
            $match_part = "unread = true AND score >= 0";

            $intl = (int) get_pref("FRESH_ARTICLE_MAX_AGE", $owner_uid);

            if (DB_TYPE == "pgsql") {

The constant DB_TYPE was not found. Maybe you did not declare it correctly or list all dependencies?

                $match_part .= " AND date_entered > NOW() - INTERVAL '$intl hour' ";
            } else {
                $match_part .= " AND date_entered > DATE_SUB(NOW(), INTERVAL $intl HOUR) ";
            }

            $need_entries = true;

        } else if ($n_feed == -4) {
            $match_part = "true";
        } else if ($n_feed >= 0) {

            if ($n_feed != 0) {
                $match_part = "feed_id = ".(int) $n_feed;
            } else {
                $match_part = "feed_id IS NULL";
            }

        } else if ($feed < LABEL_BASE_INDEX) {

            $label_id = Labels::feed_to_label_id($feed);

            return Feeds::getLabelUnread($label_id, $owner_uid);
        }

        if ($match_part) {

            if ($need_entries) {
                $from_qpart = "ttrss_user_entries,ttrss_entries";
                $from_where = "ttrss_entries.id = ttrss_user_entries.ref_id AND";
            } else {
                $from_qpart = "ttrss_user_entries";
                $from_where = "";
            }

            $sth = $pdo->prepare("SELECT count(int_id) AS unread
				FROM $from_qpart WHERE
				$unread_qpart AND $from_where ($match_part) AND ttrss_user_entries.owner_uid = ?");
            $sth->execute([$owner_uid]);
            $row = $sth->fetch();

            return $row["unread"];

        } else {

            $sth = $pdo->prepare("SELECT COUNT(post_int_id) AS unread
				FROM ttrss_tags,ttrss_user_entries,ttrss_entries
				WHERE tag_name = ? AND post_int_id = int_id AND ref_id = ttrss_entries.id
				AND $unread_qpart AND ttrss_tags.owner_uid = ,");

            $sth->execute([$feed, $owner_uid]);
            $row = $sth->fetch();

            return $row["unread"];
        }
    }

    /**
     * @return array (code => Status code, message => error message if available)
     *
     *                 0 - OK, Feed already exists
     *                 1 - OK, Feed added
     *                 2 - Invalid URL
     *                 3 - URL content is HTML, no feeds available
     *                 4 - URL content is HTML which contains multiple feeds.
     *                     Here you should call extractfeedurls in rpc-backend
     *                     to get all possible feeds.
     *                 5 - Couldn't download the URL content.
     *                 6 - Content is an invalid XML.
     */
    public static function subscribe_to_feed($url, $cat_id = 0,
                                $auth_login = '', $auth_pass = '') {

        global $fetch_last_error;
        global $fetch_last_error_content;
        global $fetch_last_content_type;

        $pdo = Db::pdo();

        $url = Feeds::fix_url($url);

        if (!$url || !Feeds::validate_feed_url($url)) {
            return array("code" => 2);
        }

        $contents = @fetch_file_contents($url, false, $auth_login, $auth_pass);

        foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_SUBSCRIBE_FEED) as $plugin) {
            $contents = $plugin->hook_subscribe_feed($contents, $url, $auth_login, $auth_pass);
        }

        if (!$contents) {
            if (preg_match("/cloudflare\.com/", $fetch_last_error_content)) {
                $fetch_last_error .= " (feed behind Cloudflare)";
            }

            return array("code" => 5, "message" => $fetch_last_error);
        }

        if (mb_strpos($fetch_last_content_type, "html") !== false && Feeds::is_html($contents)) {
            $feedUrls = Feeds::get_feeds_from_html($url, $contents);

            if (count($feedUrls) == 0) {
                return array("code" => 3);
            } else if (count($feedUrls) > 1) {
                return array("code" => 4, "feeds" => $feedUrls);
            }
            //use feed url as new URL
            $url = key($feedUrls);
        }

        if (!$cat_id) {
            $cat_id = null;
        }

        $sth = $pdo->prepare("SELECT id FROM ttrss_feeds
			WHERE feed_url = ? AND owner_uid = ?");
        $sth->execute([$url, $_SESSION['uid']]);

        if ($row = $sth->fetch()) {
            return array("code" => 0, "feed_id" => (int) $row["id"]);
        } else {
            $sth = $pdo->prepare(
                "INSERT INTO ttrss_feeds
					(owner_uid,feed_url,title,cat_id, auth_login,auth_pass,update_method,auth_pass_encrypted)
				VALUES (?, ?, ?, ?, ?, ?, 0, false)");

            $sth->execute([$_SESSION['uid'], $url, "[Unknown]", $cat_id, (string) $auth_login, (string) $auth_pass]);

            $sth = $pdo->prepare("SELECT id FROM ttrss_feeds WHERE feed_url = ?
					AND owner_uid = ?");
            $sth->execute([$url, $_SESSION['uid']]);
            $row = $sth->fetch();

            $feed_id = $row["id"];

            if ($feed_id) {
                RSSUtils::set_basic_feed_info($feed_id);
            }

            return array("code" => 1, "feed_id" => (int) $feed_id);

        }
    }

    public static function getIconFile($feed_id) {
        return ICONS_DIR."/$feed_id.ico";

The constant ICONS_DIR was not found. Maybe you did not declare it correctly or list all dependencies?

    }

    public static function feedHasIcon($id) {
        return is_file(ICONS_DIR."/$id.ico") && filesize(ICONS_DIR."/$id.ico") > 0;

The constant ICONS_DIR was not found. Maybe you did not declare it correctly or list all dependencies?

    }

    public static function getFeedIcon($id) {
        switch ($id) {
        case 0:
            return "archive";
        case -1:
            return "star";
        case -2:
            return "rss_feed";
        case -3:
            return "whatshot";
        case -4:
            return "inbox";
        case -6:
            return "restore";
        default:
            if ($id < LABEL_BASE_INDEX) {
                return "label";
            } else {
                $icon = self::getIconFile($id);

                if ($icon && file_exists($icon)) {
                    return ICONS_URL."/".basename($icon)."?".filemtime($icon);

The constant ICONS_URL was not found. Maybe you did not declare it correctly or list all dependencies?

                }
            }
        }

        return false;
    }

    public static function getFeedTitle($id, $cat = false) {
        $pdo = Db::pdo();

        if ($cat) {
            return Feeds::getCategoryTitle($id);
        } else if ($id == -1) {
            return __("Starred articles");
        } else if ($id == -2) {
            return __("Published articles");
        } else if ($id == -3) {
            return __("Fresh articles");
        } else if ($id == -4) {
            return __("All articles");
        } else if ($id === 0 || $id === "0") {
            return __("Archived articles");
        } else if ($id == -6) {
            return __("Recently read");
        } else if ($id < LABEL_BASE_INDEX) {

            $label_id = Labels::feed_to_label_id($id);

            $sth = $pdo->prepare("SELECT caption FROM ttrss_labels2 WHERE id = ?");
            $sth->execute([$label_id]);

            if ($row = $sth->fetch()) {
                return $row["caption"];
            } else {
                return "Unknown label ($label_id)";
            }

        } else if (is_numeric($id) && $id > 0) {

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

            if ($row = $sth->fetch()) {
                return $row["title"];
            } else {
                return "Unknown feed ($id)";
            }

        } else {
            return $id;
        }
    }

    public static function getCategoryUnread($cat, $owner_uid = false) {

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

        $pdo = Db::pdo();

        if ($cat >= 0) {

            if (!$cat) {
                $cat = null;
            }

            $sth = $pdo->prepare("SELECT id FROM ttrss_feeds
                    WHERE (cat_id = :cat OR (:cat IS NULL AND cat_id IS NULL))
					AND owner_uid = :uid");

            $sth->execute([":cat" => $cat, ":uid" => $owner_uid]);

            $cat_feeds = array();
            while ($line = $sth->fetch()) {
                array_push($cat_feeds, "feed_id = ".(int) $line["id"]);
            }

            if (count($cat_feeds) == 0) {
                return 0;
            }

            $match_part = implode(" OR ", $cat_feeds);

            $sth = $pdo->prepare("SELECT COUNT(int_id) AS unread
				FROM ttrss_user_entries
				WHERE	unread = true AND ($match_part)
				AND owner_uid = ?");
            $sth->execute([$owner_uid]);

            $unread = 0;

            # this needs to be rewritten
            while ($line = $sth->fetch()) {
                $unread += $line["unread"];
            }

            return $unread;
        } else if ($cat == -1) {
            return getFeedUnread(-1) + getFeedUnread(-2) + getFeedUnread(-3) + getFeedUnread(0);
        } else if ($cat == -2) {

            $sth = $pdo->prepare("SELECT COUNT(unread) AS unread FROM
					ttrss_user_entries, ttrss_user_labels2
				WHERE article_id = ref_id AND unread = true
					AND ttrss_user_entries.owner_uid = ?");
            $sth->execute([$owner_uid]);
            $row = $sth->fetch();

            return $row["unread"];
        }
    }

    // only accepts real cats (>= 0)
    public static function getCategoryChildrenUnread($cat, $owner_uid = false) {
        if (!$owner_uid) {
            $owner_uid = $_SESSION["uid"];
        }

        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT id FROM ttrss_feed_categories WHERE parent_cat = ?
				AND owner_uid = ?");
        $sth->execute([$cat, $owner_uid]);

        $unread = 0;

        while ($line = $sth->fetch()) {
            $unread += Feeds::getCategoryUnread($line["id"], $owner_uid);
            $unread += Feeds::getCategoryChildrenUnread($line["id"], $owner_uid);
        }

        return $unread;
    }

    public static function getGlobalUnread($user_id = false) {

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

        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT SUM(value) AS c_id FROM ttrss_counters_cache
			WHERE owner_uid = ? AND feed_id > 0");
        $sth->execute([$user_id]);
        $row = $sth->fetch();

        return $row["c_id"];
    }

    public static function getCategoryTitle($cat_id) {

        if ($cat_id == -1) {
            return __("Special");
        } else if ($cat_id == -2) {
            return __("Labels");
        } else {

            $pdo = Db::pdo();

            $sth = $pdo->prepare("SELECT title FROM ttrss_feed_categories WHERE
				id = ?");
            $sth->execute([$cat_id]);

            if ($row = $sth->fetch()) {
                return $row["title"];
            } else {
                return __("Uncategorized");
            }
        }
    }

    public static function getLabelUnread($label_id, $owner_uid = false) {
        if (!$owner_uid) {
            $owner_uid = $_SESSION["uid"];
        }

        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT COUNT(ref_id) AS unread FROM ttrss_user_entries, ttrss_user_labels2
			WHERE owner_uid = ? AND unread = true AND label_id = ? AND article_id = ref_id");

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

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

    public static function queryFeedHeadlines($params) {

        $pdo = Db::pdo();

        // WARNING: due to highly dynamic nature of this query its going to quote parameters
        // right before adding them to SQL part

        $feed = $params["feed"];
        $limit = isset($params["limit"]) ? $params["limit"] : 30;
        $view_mode = $params["view_mode"];
        $cat_view = isset($params["cat_view"]) ? $params["cat_view"] : false;
        $search = isset($params["search"]) ? $params["search"] : false;
        $search_language = isset($params["search_language"]) ? $params["search_language"] : "";
        $override_order = isset($params["override_order"]) ? $params["override_order"] : false;
        $offset = isset($params["offset"]) ? $params["offset"] : 0;
        $owner_uid = isset($params["owner_uid"]) ? $params["owner_uid"] : $_SESSION["uid"];
        $since_id = isset($params["since_id"]) ? $params["since_id"] : 0;
        $include_children = isset($params["include_children"]) ? $params["include_children"] : false;
        $ignore_vfeed_group = isset($params["ignore_vfeed_group"]) ? $params["ignore_vfeed_group"] : false;
        $override_strategy = isset($params["override_strategy"]) ? $params["override_strategy"] : false;
        $override_vfeed = isset($params["override_vfeed"]) ? $params["override_vfeed"] : false;
        $start_ts = isset($params["start_ts"]) ? $params["start_ts"] : false;
        $check_first_id = isset($params["check_first_id"]) ? $params["check_first_id"] : false;
        $skip_first_id_check = isset($params["skip_first_id_check"]) ? $params["skip_first_id_check"] : false;
        //$order_by = isset($params["order_by"]) ? $params["order_by"] : false;

        $ext_tables_part = "";
        $limit_query_part = "";
        $query_error_override = "";

        $search_words = [];

        if ($search) {
            $search_query_part = "";

            foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_SEARCH) as $plugin) {
                list($search_query_part, $search_words) = $plugin->hook_search($search);
                break;
            }

            // fall back in case of no plugins
            if (!$search_query_part) {
                list($search_query_part, $search_words) = Feeds::search_to_sql($search, $search_language);
            }

            if (DB_TYPE == "pgsql") {

The constant DB_TYPE was not found. Maybe you did not declare it correctly or list all dependencies?

                $test_sth = $pdo->prepare("select $search_query_part
					FROM ttrss_entries, ttrss_user_entries WHERE id = ref_id limit 1");

                try {
                    $test_sth->execute();
                } catch (PDOException $e) {
                    // looks like tsquery syntax is invalid
                    $search_query_part = "false";

                    $query_error_override = T_sprintf("Incorrect search syntax: %s.", implode(" ", $search_words));
                }
            }

            $search_query_part .= " AND ";
        } else {
            $search_query_part = "";
        }

        if ($since_id) {
            $since_id_part = "ttrss_entries.id > ".$pdo->quote($since_id)." AND ";
        } else {
            $since_id_part = "";
        }

        $view_query_part = "";

        if ($view_mode == "adaptive") {
            if ($search) {
                $view_query_part = " ";
            } else if ($feed != -1) {

                $unread = getFeedUnread($feed, $cat_view);

                if ($cat_view && $feed > 0 && $include_children) {
                                    $unread += Feeds::getCategoryChildrenUnread($feed);
                }

                if ($unread > 0) {
                    $view_query_part = " unread = true AND ";
                }
            }
        }

        if ($view_mode == "marked") {
            $view_query_part = " marked = true AND ";
        }

        if ($view_mode == "has_note") {
            $view_query_part = " (note IS NOT NULL AND note != '') AND ";
        }

        if ($view_mode == "published") {
            $view_query_part = " published = true AND ";
        }

        if ($view_mode == "unread" && $feed != -6) {
            $view_query_part = " unread = true AND ";
        }

        if ($limit > 0) {
            $limit_query_part = "LIMIT ".(int) $limit;
        }

        $allow_archived = false;

        $vfeed_query_part = "";

        /* tags */
        if (!is_numeric($feed)) {
            $query_strategy_part = "true";
            $vfeed_query_part = "(SELECT title FROM ttrss_feeds WHERE
					id = feed_id) as feed_title,";
        } else if ($feed > 0) {

            if ($cat_view) {

                if ($feed > 0) {
                    if ($include_children) {
                        # sub-cats
                        $subcats = Feeds::getChildCategories($feed, $owner_uid);
                        array_push($subcats, $feed);
                        $subcats = array_map("intval", $subcats);

                        $query_strategy_part = "cat_id IN (".
                            implode(",", $subcats).")";

                    } else {
                        $query_strategy_part = "cat_id = ".$pdo->quote($feed);
                    }

                } else {
                    $query_strategy_part = "cat_id IS NULL";
                }

                $vfeed_query_part = "ttrss_feeds.title AS feed_title,";

            } else {
                $query_strategy_part = "feed_id = ".$pdo->quote($feed);
            }
        } else if ($feed == 0 && !$cat_view) { // archive virtual feed
            $query_strategy_part = "feed_id IS NULL";
            $allow_archived = true;
        } else if ($feed == 0 && $cat_view) { // uncategorized
            $query_strategy_part = "cat_id IS NULL AND feed_id IS NOT NULL";
            $vfeed_query_part = "ttrss_feeds.title AS feed_title,";
        } else if ($feed == -1) { // starred virtual feed
            $query_strategy_part = "marked = true";
            $vfeed_query_part = "ttrss_feeds.title AS feed_title,";
            $allow_archived = true;

            if (!$override_order) {
                $override_order = "last_marked DESC, date_entered DESC, updated DESC";
            }

        } else if ($feed == -2) { // published virtual feed OR labels category

            if (!$cat_view) {
                $query_strategy_part = "published = true";
                $vfeed_query_part = "ttrss_feeds.title AS feed_title,";
                $allow_archived = true;

                if (!$override_order) {
                    $override_order = "last_published DESC, date_entered DESC, updated DESC";
                }

            } else {
                $vfeed_query_part = "ttrss_feeds.title AS feed_title,";

                $ext_tables_part = "ttrss_labels2,ttrss_user_labels2,";

                $query_strategy_part = "ttrss_labels2.id = ttrss_user_labels2.label_id AND
						ttrss_user_labels2.article_id = ref_id";

            }
        } else if ($feed == -6) { // recently read
            $query_strategy_part = "unread = false AND last_read IS NOT NULL";

            if (DB_TYPE == "pgsql") {
                $query_strategy_part .= " AND last_read > NOW() - INTERVAL '1 DAY' ";
            } else {
                $query_strategy_part .= " AND last_read > DATE_SUB(NOW(), INTERVAL 1 DAY) ";
            }

            $vfeed_query_part = "ttrss_feeds.title AS feed_title,";
            $allow_archived = true;
            $ignore_vfeed_group = true;

            if (!$override_order) {
                $override_order = "last_read DESC";
            }

        } else if ($feed == -3) { // fresh virtual feed
            $query_strategy_part = "unread = true AND score >= 0";

            $intl = (int) get_pref("FRESH_ARTICLE_MAX_AGE", $owner_uid);

            if (DB_TYPE == "pgsql") {
                $query_strategy_part .= " AND date_entered > NOW() - INTERVAL '$intl hour' ";
            } else {
                $query_strategy_part .= " AND date_entered > DATE_SUB(NOW(), INTERVAL $intl HOUR) ";
            }

            $vfeed_query_part = "ttrss_feeds.title AS feed_title,";
        } else if ($feed == -4) { // all articles virtual feed
            $allow_archived = true;
            $query_strategy_part = "true";
            $vfeed_query_part = "ttrss_feeds.title AS feed_title,";
        } else if ($feed <= LABEL_BASE_INDEX) { // labels
            $label_id = Labels::feed_to_label_id($feed);

            $query_strategy_part = "label_id = ".$pdo->quote($label_id)." AND
					ttrss_labels2.id = ttrss_user_labels2.label_id AND
					ttrss_user_labels2.article_id = ref_id";

            $vfeed_query_part = "ttrss_feeds.title AS feed_title,";
            $ext_tables_part = "ttrss_labels2,ttrss_user_labels2,";
            $allow_archived = true;

        } else {
            $query_strategy_part = "true";
        }

        $order_by = "score DESC, date_entered DESC, updated DESC";

        if ($override_order) {
            $order_by = $override_order;
        }

        if ($override_strategy) {
            $query_strategy_part = $override_strategy;
        }

        if ($override_vfeed) {
            $vfeed_query_part = $override_vfeed;
        }

        if ($search) {
            $feed_title = T_sprintf("Search results: %s", $search);
        } else {
            if ($cat_view) {
                $feed_title = Feeds::getCategoryTitle($feed);
            } else {
                if (is_numeric($feed) && $feed > 0) {
                    $ssth = $pdo->prepare("SELECT title,site_url,last_error,last_updated
							FROM ttrss_feeds WHERE id = ? AND owner_uid = ?");
                    $ssth->execute([$feed, $owner_uid]);
                    $row = $ssth->fetch();

                    $feed_title = $row["title"];
                    $feed_site_url = $row["site_url"];
                    $last_error = $row["last_error"];
                    $last_updated = $row["last_updated"];
                } else {
                    $feed_title = Feeds::getFeedTitle($feed);
                }
            }
        }

        $content_query_part = "content, ";

        if ($limit_query_part) {
            $offset_query_part = "OFFSET ".(int) $offset;
        } else {
            $offset_query_part = "";
        }

        if ($start_ts) {
            $start_ts_formatted = date("Y/m/d H:i:s", strtotime($start_ts));
            $start_ts_query_part = "date_entered >= '$start_ts_formatted' AND";
        } else {
            $start_ts_query_part = "";
        }

        if (is_numeric($feed)) {
            // proper override_order applied above
            if ($vfeed_query_part && !$ignore_vfeed_group && get_pref('VFEED_GROUP_BY_FEED', $owner_uid)) {

                if (!(in_array($feed, Feeds::NEVER_GROUP_BY_DATE) && !$cat_view)) {
                    $yyiw_desc = $order_by == "date_reverse" ? "" : "desc";
                    $yyiw_order_qpart = "yyiw $yyiw_desc, ";
                } else {
                    $yyiw_order_qpart = "";
                }

                if (!$override_order) {
                    $order_by = "$yyiw_order_qpart ttrss_feeds.title, $order_by";
                } else {
                    $order_by = "$yyiw_order_qpart ttrss_feeds.title, $override_order";
                }
            }

            if (!$allow_archived) {
                $from_qpart = "${ext_tables_part}ttrss_entries LEFT JOIN ttrss_user_entries ON (ref_id = ttrss_entries.id),ttrss_feeds";
                $feed_check_qpart = "ttrss_user_entries.feed_id = ttrss_feeds.id AND";

            } else {
                $from_qpart = "${ext_tables_part}ttrss_entries LEFT JOIN ttrss_user_entries ON (ref_id = ttrss_entries.id)
						LEFT JOIN ttrss_feeds ON (feed_id = ttrss_feeds.id)";
            }

            if ($vfeed_query_part) {
                $vfeed_query_part .= "favicon_avg_color,";
            }

            $first_id = 0;
            $first_id_query_strategy_part = $query_strategy_part;

            if ($feed == -3) {
                            $first_id_query_strategy_part = "true";
            }

            if (DB_TYPE == "pgsql") {
                $sanity_interval_qpart = "date_entered >= NOW() - INTERVAL '1 hour' AND";
                $yyiw_qpart = "to_char(date_entered, 'IYYY-IW') AS yyiw";
            } else {
                $sanity_interval_qpart = "date_entered >= DATE_SUB(NOW(), INTERVAL 1 hour) AND";
                $yyiw_qpart = "date_format(date_entered, '%Y-%u') AS yyiw";
            }

            if (!$search && !$skip_first_id_check) {
                // if previous topmost article id changed that means our current pagination is no longer valid
                $query = "SELECT DISTINCT
							ttrss_feeds.title,
							date_entered,
                            $yyiw_qpart,
							guid,
							ttrss_entries.id,
							ttrss_entries.title,
							updated,
							score,
							marked,
							published,
							last_marked,
							last_published,
							last_read
						FROM
							$from_qpart
						WHERE
						$feed_check_qpart

The variable $feed_check_qpart does not seem to be defined for all execution paths leading up to this point.

						ttrss_user_entries.owner_uid = ".$pdo->quote($owner_uid)." AND
						$search_query_part
						$start_ts_query_part
						$since_id_part
						$sanity_interval_qpart
						$first_id_query_strategy_part ORDER BY $order_by LIMIT 1";

                /*if ($_REQUEST["debug"]) {
					print $query;
				}*/

                $res = $pdo->query($query);

                if ($row = $res->fetch()) {
                    $first_id = (int) $row["id"];

                    if ($offset > 0 && $first_id && $check_first_id && $first_id != $check_first_id) {
                        return array(-1, $feed_title, $feed_site_url, $last_error, $last_updated, $search_words, $first_id, $vfeed_query_part != "", $query_error_override);

The variable $last_updated does not seem to be defined for all execution paths leading up to this point.

The variable $feed_site_url does not seem to be defined for all execution paths leading up to this point.

The variable $last_error does not seem to be defined for all execution paths leading up to this point.

                    }
                }
            }

            $query = "SELECT DISTINCT
						date_entered,
                        $yyiw_qpart,
						guid,
						ttrss_entries.id,ttrss_entries.title,
						updated,
						label_cache,
						tag_cache,
						always_display_enclosures,
						site_url,
						note,
						num_comments,
						comments,
						int_id,
						uuid,
						lang,
						hide_images,
						unread,feed_id,marked,published,link,last_read,orig_feed_id,
						last_marked, last_published,
						$vfeed_query_part
						$content_query_part
						author,score
					FROM
						$from_qpart
					WHERE
					$feed_check_qpart
					ttrss_user_entries.owner_uid = ".$pdo->quote($owner_uid)." AND
					$search_query_part
					$start_ts_query_part
					$view_query_part
					$since_id_part
					$query_strategy_part ORDER BY $order_by
					$limit_query_part $offset_query_part";

            //if ($_REQUEST["debug"]) print $query;

            $res = $pdo->query($query);

        } else {
            // browsing by tag

            $query = "SELECT DISTINCT
							date_entered,
							guid,
							note,
							ttrss_entries.id as id,
							title,
							updated,
							unread,
							feed_id,
							orig_feed_id,
							marked,
							published,
							num_comments,
							comments,
							int_id,
							tag_cache,
							label_cache,
							link,
							lang,
							uuid,
							last_read,
							(SELECT hide_images FROM ttrss_feeds WHERE id = feed_id) AS hide_images,
							last_marked, last_published,
							$since_id_part
							$vfeed_query_part
							$content_query_part
							author, score
						FROM ttrss_entries, ttrss_user_entries, ttrss_tags
						WHERE
							ref_id = ttrss_entries.id AND
							ttrss_user_entries.owner_uid = ".$pdo->quote($owner_uid)." AND
							post_int_id = int_id AND
							tag_name = ".$pdo->quote($feed)." AND
							$view_query_part
							$search_query_part
							$start_ts_query_part
							$query_strategy_part ORDER BY $order_by
							$limit_query_part $offset_query_part";

            if ($_REQUEST["debug"]) {
                print $query;
            }

            $res = $pdo->query($query);
        }

        return array($res, $feed_title, $feed_site_url, $last_error, $last_updated, $search_words, $first_id, $vfeed_query_part != "", $query_error_override);

The variable $first_id does not seem to be defined for all execution paths leading up to this point.

    }

    public static function getParentCategories($cat, $owner_uid) {
        $rv = array();

        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT parent_cat FROM ttrss_feed_categories
			WHERE id = ? AND parent_cat IS NOT NULL AND owner_uid = ?");
        $sth->execute([$cat, $owner_uid]);

        while ($line = $sth->fetch()) {
            array_push($rv, $line["parent_cat"]);
            $rv = array_merge($rv, Feeds::getParentCategories($line["parent_cat"], $owner_uid));
        }

        return $rv;
    }

    public static function getChildCategories($cat, $owner_uid) {
        $rv = array();

        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT id FROM ttrss_feed_categories
			WHERE parent_cat = ? AND owner_uid = ?");
        $sth->execute([$cat, $owner_uid]);

        while ($line = $sth->fetch()) {
            array_push($rv, $line["id"]);
            $rv = array_merge($rv, Feeds::getChildCategories($line["id"], $owner_uid));
        }

        return $rv;
    }

    public static function getFeedCategory($feed) {
        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT cat_id FROM ttrss_feeds
				WHERE id = ?");
        $sth->execute([$feed]);

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

    }

    function color_of($name) {
        $colormap = ["#1cd7d7", "#d91111", "#1212d7", "#8e16e5", "#7b7b7b",
            "#39f110", "#0bbea6", "#ec0e0e", "#1534f2", "#b9e416",
            "#479af2", "#f36b14", "#10c7e9", "#1e8fe7", "#e22727"];

        $sum = 0;

        for ($i = 0; $i < strlen($name); $i++) {
            $sum += ord($name[$i]);
        }

        $sum %= count($colormap);

        return $colormap[$sum];
    }

    public static function get_feeds_from_html($url, $content) {
        $url     = Feeds::fix_url($url);
        $baseUrl = substr($url, 0, strrpos($url, '/') + 1);

        $feedUrls = [];

        $doc = new DOMDocument();
        if ($doc->loadHTML($content)) {
            $xpath = new DOMXPath($doc);
            $entries = $xpath->query('/html/head/link[@rel="alternate" and '.
                '(contains(@type,"rss") or contains(@type,"atom"))]|/html/head/link[@rel="feed"]');

            foreach ($entries as $entry) {
                if ($entry->hasAttribute('href')) {
                    $title = $entry->getAttribute('title');
                    if ($title == '') {
                        $title = $entry->getAttribute('type');
                    }
                    $feedUrl = rewrite_relative_url(
                        $baseUrl, $entry->getAttribute('href')
                    );
                    $feedUrls[$feedUrl] = $title;
                }
            }
        }
        return $feedUrls;
    }

    public static function is_html($content) {
        return preg_match("/<html|DOCTYPE html/i", substr($content, 0, 8192)) !== 0;
    }

    public static function validate_feed_url($url) {
        $parts = parse_url($url);

        return ($parts['scheme'] == 'http' || $parts['scheme'] == 'feed' || $parts['scheme'] == 'https');
    }

    /**
     * Fixes incomplete URLs by prepending "http://".
     * Also replaces feed:// with http://, and
     * prepends a trailing slash if the url is a domain name only.
     *
     * @param string $url Possibly incomplete URL
     *
     * @return string Fixed URL.
     */
    public static function fix_url($url) {

        // support schema-less urls
        if (strpos($url, '//') === 0) {
            $url = 'https:'.$url;
        }

        if (strpos($url, '://') === false) {
            $url = 'http://'.$url;
        } else if (substr($url, 0, 5) == 'feed:') {
            $url = 'http:'.substr($url, 5);
        }

        //prepend slash if the URL has no slash in it
        // "http://www.example" -> "http://www.example/"
        if (strpos($url, '/', strpos($url, ':') + 3) === false) {
            $url .= '/';
        }

        //convert IDNA hostname to punycode if possible
        if (function_exists("idn_to_ascii")) {
            $parts = parse_url($url);
            if (mb_detect_encoding($parts['host']) != 'ASCII')
            {
                $parts['host'] = idn_to_ascii($parts['host']);
                $url = build_url($parts);
            }
        }

        if ($url != "http:///") {
                    return $url;
        } else {
                    return '';
        }
    }

    public static function add_feed_category($feed_cat, $parent_cat_id = false, $order_id = 0) {

        if (!$feed_cat) {
            return false;
        }

        $feed_cat = mb_substr($feed_cat, 0, 250);
        if (!$parent_cat_id) {
            $parent_cat_id = null;
        }

        $pdo = Db::pdo();
        $tr_in_progress = false;

        try {
            $pdo->beginTransaction();
        } catch (Exception $e) {
            $tr_in_progress = true;
        }

        $sth = $pdo->prepare("SELECT id FROM ttrss_feed_categories
				WHERE (parent_cat = :parent OR (:parent IS NULL AND parent_cat IS NULL))
				AND title = :title AND owner_uid = :uid");
        $sth->execute([':parent' => $parent_cat_id, ':title' => $feed_cat, ':uid' => $_SESSION['uid']]);

        if (!$sth->fetch()) {

            $sth = $pdo->prepare("INSERT INTO ttrss_feed_categories (owner_uid,title,parent_cat,order_id)
					VALUES (?, ?, ?, ?)");
            $sth->execute([$_SESSION['uid'], $feed_cat, $parent_cat_id, (int) $order_id]);

            if (!$tr_in_progress) {
                $pdo->commit();
            }

            return true;
        }

        $pdo->commit();

        return false;
    }

    public static function get_feed_access_key($feed_id, $is_cat, $owner_uid = false) {

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

        $is_cat = bool_to_sql_bool($is_cat);

        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT access_key FROM ttrss_access_keys
				WHERE feed_id = ? AND is_cat = ?
				AND owner_uid = ?");
        $sth->execute([$feed_id, $is_cat, $owner_uid]);

        if ($row = $sth->fetch()) {
            return $row["access_key"];
        } else {
            $key = uniqid_short();

            $sth = $pdo->prepare("INSERT INTO ttrss_access_keys
					(access_key, feed_id, is_cat, owner_uid)
					VALUES (?, ?, ?, ?)");

            $sth->execute([$key, $feed_id, $is_cat, $owner_uid]);

            return $key;
        }
    }

    /**
     * Purge a feed old posts.
     *
     * @param mixed $link A database connection.
     * @param mixed $feed_id The id of the purged feed.
     * @param mixed $purge_interval Olderness of purged posts.
     * @param boolean $debug Set to True to enable the debug. False by default.
     * @access public
     * @return void
     */
    public static function purge_feed($feed_id, $purge_interval) {

        if (!$purge_interval) {
            $purge_interval = Feeds::feed_purge_interval($feed_id);
        }

        $pdo = Db::pdo();

        $sth = $pdo->prepare("SELECT owner_uid FROM ttrss_feeds WHERE id = ?");
        $sth->execute([$feed_id]);

        $owner_uid = false;

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

        if ($purge_interval == -1 || !$purge_interval) {
            if ($owner_uid) {
                CCache::update($feed_id, $owner_uid);
            }
            return;
        }

        if (!$owner_uid) {
            return;
        }

        if (FORCE_ARTICLE_PURGE == 0) {

The constant FORCE_ARTICLE_PURGE was not found. Maybe you did not declare it correctly or list all dependencies?

            $purge_unread = get_pref("PURGE_UNREAD_ARTICLES",
                $owner_uid, false);
        } else {
            $purge_unread = true;
            $purge_interval = FORCE_ARTICLE_PURGE;
        }

        if (!$purge_unread) {
                    $query_limit = " unread = false AND ";
        } else {
                    $query_limit = "";
        }

        $purge_interval = (int) $purge_interval;

        if (DB_TYPE == "pgsql") {

The constant DB_TYPE was not found. Maybe you did not declare it correctly or list all dependencies?

            $sth = $pdo->prepare("DELETE FROM ttrss_user_entries
				USING ttrss_entries
				WHERE ttrss_entries.id = ref_id AND
				marked = false AND
				feed_id = ? AND
				$query_limit
				ttrss_entries.date_updated < NOW() - INTERVAL '$purge_interval days'");
            $sth->execute([$feed_id]);

        } else {
            $sth = $pdo->prepare("DELETE FROM ttrss_user_entries
				USING ttrss_user_entries, ttrss_entries
				WHERE ttrss_entries.id = ref_id AND
				marked = false AND
				feed_id = ? AND
				$query_limit
				ttrss_entries.date_updated < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)");
            $sth->execute([$feed_id]);

        }

        $rows = $sth->rowCount();

        CCache::update($feed_id, $owner_uid);

        Debug::log("Purged feed $feed_id ($purge_interval): deleted $rows articles");

        return $rows;
    }

    public static function feed_purge_interval($feed_id) {

        $pdo = DB::pdo();

        $sth = $pdo->prepare("SELECT purge_interval, owner_uid FROM ttrss_feeds
			WHERE id = ?");
        $sth->execute([$feed_id]);

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

            if ($purge_interval == 0) {
                $purge_interval = get_pref(
                'PURGE_OLD_DAYS', $owner_uid);
            }

            return $purge_interval;

        } else {
            return -1;
        }
    }

    public static function search_to_sql($search, $search_language) {

        $keywords = str_getcsv(trim($search), " ");
        $query_keywords = array();
        $search_words = array();
        $search_query_leftover = array();

        $pdo = Db::pdo();

        if ($search_language) {
                    $search_language = $pdo->quote(mb_strtolower($search_language));
        } else {
                    $search_language = $pdo->quote("english");
        }

        foreach ($keywords as $k) {
            if (strpos($k, "-") === 0) {
                $k = substr($k, 1);
                $not = "NOT";
            } else {
                $not = "";
            }

            $commandpair = explode(":", mb_strtolower($k), 2);

            switch ($commandpair[0]) {
            case "title":
                if ($commandpair[1]) {
                    array_push($query_keywords, "($not (LOWER(ttrss_entries.title) LIKE ".
                        $pdo->quote('%'.mb_strtolower($commandpair[1]).'%')."))");
                } else {
                    array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
								OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
                    array_push($search_words, $k);
                }
                break;
            case "author":
                if ($commandpair[1]) {
                    array_push($query_keywords, "($not (LOWER(author) LIKE ".
                        $pdo->quote('%'.mb_strtolower($commandpair[1]).'%')."))");
                } else {
                    array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
								OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
                    array_push($search_words, $k);
                }
                break;
            case "note":
                if ($commandpair[1]) {
                    if ($commandpair[1] == "true") {
                                            array_push($query_keywords, "($not (note IS NOT NULL AND note != ''))");
                    } else if ($commandpair[1] == "false") {
                                            array_push($query_keywords, "($not (note IS NULL OR note = ''))");
                    } else {
                                            array_push($query_keywords, "($not (LOWER(note) LIKE ".
                            $pdo->quote('%'.mb_strtolower($commandpair[1]).'%')."))");
                    }
                } else {
                    array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER(".$pdo->quote("%$k%").")
								OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
                    if (!$not) {
                        array_push($search_words, $k);
                    }
                }
                break;
            case "star":

                if ($commandpair[1]) {
                    if ($commandpair[1] == "true") {
                                            array_push($query_keywords, "($not (marked = true))");
                    } else {
                                            array_push($query_keywords, "($not (marked = false))");
                    }
                } else {
                    array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER(".$pdo->quote("%$k%").")
								OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
                    if (!$not) {
                        array_push($search_words, $k);
                    }
                }
                break;
            case "pub":
                if ($commandpair[1]) {
                    if ($commandpair[1] == "true") {
                                            array_push($query_keywords, "($not (published = true))");
                    } else {
                                            array_push($query_keywords, "($not (published = false))");
                    }

                } else {
                    array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
								OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
                    if (!$not) {
                        array_push($search_words, $k);
                    }
                }
                break;
            case "unread":
                if ($commandpair[1]) {
                    if ($commandpair[1] == "true") {
                                            array_push($query_keywords, "($not (unread = true))");
                    } else {
                                            array_push($query_keywords, "($not (unread = false))");
                    }

                } else {
                    array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER(".$pdo->quote("%$k%").")
								OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
                    if (!$not) {
                        array_push($search_words, $k);
                    }
                }
                break;
            default:
                if (strpos($k, "@") === 0) {

                    $user_tz_string = get_pref('USER_TIMEZONE', $_SESSION['uid']);
                    $orig_ts = strtotime(substr($k, 1));
                    $k = date("Y-m-d", convert_timestamp($orig_ts, $user_tz_string, 'UTC'));

                    //$k = date("Y-m-d", strtotime(substr($k, 1)));

                    array_push($query_keywords, "(".SUBSTRING_FOR_DATE."(updated,1,LENGTH('$k')) $not = '$k')");
                } else {

                    if (DB_TYPE == "pgsql") {

The constant DB_TYPE was not found. Maybe you did not declare it correctly or list all dependencies?

                        $k = mb_strtolower($k);
                        array_push($search_query_leftover, $not ? "!$k" : $k);
                    } else {
                        array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER(".$pdo->quote("%$k%").")
								OR UPPER(ttrss_entries.content) $not LIKE UPPER(".$pdo->quote("%$k%")."))");
                    }

                    if (!$not) {
                        array_push($search_words, $k);
                    }
                }
            }
        }

        if (count($search_query_leftover) > 0) {

            if (DB_TYPE == "pgsql") {

                // if there's no joiners consider this a "simple" search and
                // concatenate everything with &, otherwise don't try to mess with tsquery syntax
                if (preg_match("/[&|]/", implode(" ", $search_query_leftover))) {
                    $tsquery = $pdo->quote(implode(" ", $search_query_leftover));
                } else {
                    $tsquery = $pdo->quote(implode(" & ", $search_query_leftover));
                }

                array_push($query_keywords,
                    "(tsvector_combined @@ to_tsquery($search_language, $tsquery))");
            }

        }

        $search_query_part = implode("AND", $query_keywords);

        return array($search_query_part, $search_words);
    }
}