migrate the rest into Config::

13 files changed, 166 insertions, 132 deletions

diff --git a/classes/config.php b/classes/config.php
index 8a7470135..349706390 100644
--- a/classes/config.php
+++ b/classes/config.php
@@ -1,98 +1,134 @@
 <?php
 class Config {
+	private const _ENVVAR_PREFIX = "TTRSS_";
 
-   const DB_TYPE = "DB_TYPE";
-   const DB_HOST = "DB_HOST";
-   const DB_USER = "DB_USER";
-   const DB_NAME = "DB_NAME";
-   const DB_PASS = "DB_PASS";
-   const DB_PORT = "DB_PORT";
-   const MYSQL_CHARSET = "MYSQL_CHARSET";
-   const SELF_URL_PATH = "SELF_URL_PATH";
-   const SINGLE_USER_MODE = "SINGLE_USER_MODE";
-   const SIMPLE_UPDATE_MODE = "SIMPLE_UPDATE_MODE";
-   const PHP_EXECUTABLE = "PHP_EXECUTABLE";
-   const LOCK_DIRECTORY = "LOCK_DIRECTORY";
-   const CACHE_DIR = "CACHE_DIR";
-   const ICONS_DIR = "ICONS_DIR";
-   const ICONS_URL = "ICONS_URL";
-   const AUTH_AUTO_CREATE = "AUTH_AUTO_CREATE";
-   const AUTH_AUTO_LOGIN = "AUTH_AUTO_LOGIN";
-   const FORCE_ARTICLE_PURGE = "FORCE_ARTICLE_PURGE";
-   const ENABLE_REGISTRATION = "ENABLE_REGISTRATION";
-   const SESSION_COOKIE_LIFETIME = "SESSION_COOKIE_LIFETIME";
-   const SMTP_FROM_NAME = "SMTP_FROM_NAME";
-   const SMTP_FROM_ADDRESS = "SMTP_FROM_ADDRESS";
-   const DIGEST_SUBJECT = "DIGEST_SUBJECT";
-   const CHECK_FOR_UPDATES = "CHECK_FOR_UPDATES";
-   const PLUGINS = "PLUGINS";
-   const LOG_DESTINATION = "LOG_DESTINATION";
+	/* overriding defaults (defined below in _DEFAULTS[]) via environment: DB_TYPE becomes TTRSS_DB_TYPE, etc */
 
-   private const _DEFAULTS = [
-      Config::DB_TYPE => "pgsql",
-      Config::DB_HOST => "db",
-      Config::DB_USER => "",
-      Config::DB_NAME => "",
-      Config::DB_PASS => "",
-      Config::DB_PORT => "5432",
-      Config::MYSQL_CHARSET => "UTF8",
-      Config::SELF_URL_PATH => "",
-      Config::SINGLE_USER_MODE => "",
-      Config::SIMPLE_UPDATE_MODE => "",
-      Config::PHP_EXECUTABLE => "/usr/bin/php",
-      Config::LOCK_DIRECTORY => "lock",
-      Config::CACHE_DIR => "cache",
-      Config::ICONS_DIR => "feed-icons",
-      Config::ICONS_URL => "feed-icons",
-      Config::AUTH_AUTO_CREATE => "true",
-      Config::AUTH_AUTO_LOGIN => "true",
-      Config::FORCE_ARTICLE_PURGE => 0,
-      Config::ENABLE_REGISTRATION => "",
-      Config::SESSION_COOKIE_LIFETIME => 86400,
-      Config::SMTP_FROM_NAME => "Tiny Tiny RSS",
-      Config::SMTP_FROM_ADDRESS => "noreply@localhost",
-      Config::DIGEST_SUBJECT => "[tt-rss] New headlines for last 24 hours",
-      Config::CHECK_FOR_UPDATES => "true",
-      Config::PLUGINS => "auth_internal",
-      Config::LOG_DESTINATION => "sql",
-   ];
+	const DB_TYPE = "DB_TYPE";
+	const DB_HOST = "DB_HOST";
+	const DB_USER = "DB_USER";
+	const DB_NAME = "DB_NAME";
+	const DB_PASS = "DB_PASS";
+	const DB_PORT = "DB_PORT";
+	const MYSQL_CHARSET = "MYSQL_CHARSET";
+	const SELF_URL_PATH = "SELF_URL_PATH";
+	const SINGLE_USER_MODE = "SINGLE_USER_MODE";
+	const SIMPLE_UPDATE_MODE = "SIMPLE_UPDATE_MODE";
+	const PHP_EXECUTABLE = "PHP_EXECUTABLE";
+	const LOCK_DIRECTORY = "LOCK_DIRECTORY";
+	const CACHE_DIR = "CACHE_DIR";
+	const ICONS_DIR = "ICONS_DIR";
+	const ICONS_URL = "ICONS_URL";
+	const AUTH_AUTO_CREATE = "AUTH_AUTO_CREATE";
+	const AUTH_AUTO_LOGIN = "AUTH_AUTO_LOGIN";
+	const FORCE_ARTICLE_PURGE = "FORCE_ARTICLE_PURGE";
+	const ENABLE_REGISTRATION = "ENABLE_REGISTRATION";
+	const SESSION_COOKIE_LIFETIME = "SESSION_COOKIE_LIFETIME";
+	const SMTP_FROM_NAME = "SMTP_FROM_NAME";
+	const SMTP_FROM_ADDRESS = "SMTP_FROM_ADDRESS";
+	const DIGEST_SUBJECT = "DIGEST_SUBJECT";
+	const CHECK_FOR_UPDATES = "CHECK_FOR_UPDATES";
+	const PLUGINS = "PLUGINS";
+	const LOG_DESTINATION = "LOG_DESTINATION";
+	const LOCAL_OVERRIDE_STYLESHEET = "LOCAL_OVERRIDE_STYLESHEET";
+	const DAEMON_MAX_CHILD_RUNTIME = "DAEMON_MAX_CHILD_RUNTIME";
+	const DAEMON_MAX_JOBS = "DAEMON_MAX_JOBS";
+	const FEED_FETCH_TIMEOUT = "FEED_FETCH_TIMEOUT";
+	const FEED_FETCH_NO_CACHE_TIMEOUT = "FEED_FETCH_NO_CACHE_TIMEOUT";
+	const FILE_FETCH_TIMEOUT = "FILE_FETCH_TIMEOUT";
+	const FILE_FETCH_CONNECT_TIMEOUT = "FILE_FETCH_CONNECT_TIMEOUT";
+	const DAEMON_UPDATE_LOGIN_LIMIT = "DAEMON_UPDATE_LOGIN_LIMIT";
+	const DAEMON_FEED_LIMIT = "DAEMON_FEED_LIMIT";
+	const DAEMON_SLEEP_INTERVAL = "DAEMON_SLEEP_INTERVAL";
+	const MAX_CACHE_FILE_SIZE = "MAX_CACHE_FILE_SIZE";
+	const MAX_DOWNLOAD_FILE_SIZE = "MAX_DOWNLOAD_FILE_SIZE";
+	const MAX_FAVICON_FILE_SIZE = "MAX_FAVICON_FILE_SIZE";
+	const CACHE_MAX_DAYS = "CACHE_MAX_DAYS";
+	const MAX_CONDITIONAL_INTERVAL = "MAX_CONDITIONAL_INTERVAL";
+	const DAEMON_UNSUCCESSFUL_DAYS_LIMIT = "DAEMON_UNSUCCESSFUL_DAYS_LIMIT";
+	const LOG_SENT_MAIL = "LOG_SENT_MAIL";
 
-   private const _ENVVAR_PREFIX = "TTRSS_";
-   private static $instance;
+	private const _DEFAULTS = [
+		Config::DB_TYPE => "pgsql",
+		Config::DB_HOST => "db",
+		Config::DB_USER => "",
+		Config::DB_NAME => "",
+		Config::DB_PASS => "",
+		Config::DB_PORT => "5432",
+		Config::MYSQL_CHARSET => "UTF8",
+		Config::SELF_URL_PATH => "",
+		Config::SINGLE_USER_MODE => "",
+		Config::SIMPLE_UPDATE_MODE => "",
+		Config::PHP_EXECUTABLE => "/usr/bin/php",
+		Config::LOCK_DIRECTORY => "lock",
+		Config::CACHE_DIR => "cache",
+		Config::ICONS_DIR => "feed-icons",
+		Config::ICONS_URL => "feed-icons",
+		Config::AUTH_AUTO_CREATE => "true",
+		Config::AUTH_AUTO_LOGIN => "true",
+		Config::FORCE_ARTICLE_PURGE => 0,
+		Config::ENABLE_REGISTRATION => "",
+		Config::SESSION_COOKIE_LIFETIME => 86400,
+		Config::SMTP_FROM_NAME => "Tiny Tiny RSS",
+		Config::SMTP_FROM_ADDRESS => "noreply@localhost",
+		Config::DIGEST_SUBJECT => "[tt-rss] New headlines for last 24 hours",
+		Config::CHECK_FOR_UPDATES => "true",
+		Config::PLUGINS => "auth_internal",
+		Config::LOG_DESTINATION => "sql",
+		Config::LOCAL_OVERRIDE_STYLESHEET => "local-overrides.css",
+		Config::DAEMON_MAX_CHILD_RUNTIME => 1800,
+		Config::DAEMON_MAX_JOBS => 2,
+		Config::FEED_FETCH_TIMEOUT => 45,
+		Config::FEED_FETCH_NO_CACHE_TIMEOUT => 15,
+		Config::FILE_FETCH_TIMEOUT => 45,
+		Config::FILE_FETCH_CONNECT_TIMEOUT => 15,
+		Config::DAEMON_UPDATE_LOGIN_LIMIT => 30,
+		Config::DAEMON_FEED_LIMIT => 500,
+		Config::DAEMON_SLEEP_INTERVAL => 120,
+		Config::MAX_CACHE_FILE_SIZE => 64*1024*1024,
+		Config::MAX_DOWNLOAD_FILE_SIZE => 16*1024*1024,
+		Config::MAX_FAVICON_FILE_SIZE => 1*1024*1024,
+		Config::CACHE_MAX_DAYS => 7,
+		Config::MAX_CONDITIONAL_INTERVAL => 3600*12,
+		Config::DAEMON_UNSUCCESSFUL_DAYS_LIMIT => 30,
+		Config::LOG_SENT_MAIL => "",
+	];
 
-   private $params = [];
+	private static $instance;
 
-   public static function get_instance() {
+	private $params = [];
+
+	public static function get_instance() {
 		if (self::$instance == null)
 			self::$instance = new self();
 
 		return self::$instance;
 	}
 
-   function __construct() {
-      $ref = new ReflectionClass(get_class($this));
+	function __construct() {
+		$ref = new ReflectionClass(get_class($this));
 
-      foreach ($ref->getConstants() as $const => $cvalue) {
-         if (strpos($const, "_") !== 0) {
-            $override = getenv($this::_ENVVAR_PREFIX . $const);
+		foreach ($ref->getConstants() as $const => $cvalue) {
+			if (strpos($const, "_") !== 0) {
+				$override = getenv($this::_ENVVAR_PREFIX . $const);
 
-            if (!empty($override)) {
-               $this->params[$cvalue] = $override;
-            } else {
-               $this->params[$cvalue] = $this::_DEFAULTS[$const];
-            }
-         }
-      }
-   }
+				if (!empty($override)) {
+					$this->params[$cvalue] = $override;
+				} else {
+					$this->params[$cvalue] = $this::_DEFAULTS[$const];
+				}
+			}
+		}
+	}
 
-   private function _get($param) {
-      return $this->params[$param];
-   }
+	private function _get($param) {
+		return $this->params[$param];
+	}
 
-   static function get($param) {
-      $instance = self::get_instance();
+	static function get($param) {
+		$instance = self::get_instance();
 
-      return $instance->_get($param);
-   }
+		return $instance->_get($param);
+	}
 
 }
\ No newline at end of file
diff --git a/classes/db.php b/classes/db.php
index 1ccaa3533..5196e7c7d 100755
--- a/classes/db.php
+++ b/classes/db.php
@@ -41,8 +41,8 @@ class Db
 		} else if (Config::get(Config::DB_TYPE) == "mysql") {
 			$pdo->query("SET time_zone = '+0:0'");
 
-			if (defined('MYSQL_CHARSET') && MYSQL_CHARSET) {
-				$pdo->query("SET NAMES " . MYSQL_CHARSET);
+			if (defined('Config::get(Config::MYSQL_CHARSET)') && Config::get(Config::MYSQL_CHARSET)) {
+				$pdo->query("SET NAMES " . Config::get(Config::MYSQL_CHARSET));
 			}
 		}
 
diff --git a/classes/digest.php b/classes/digest.php
index 9ac3f6a17..a6a0c47de 100644
--- a/classes/digest.php
+++ b/classes/digest.php
@@ -48,11 +48,11 @@ class Digest
 
 						$mailer = new Mailer();
 
-						//$rc = $mail->quickMail($line["email"], $line["login"], DIGEST_SUBJECT, $digest, $digest_text);
+						//$rc = $mail->quickMail($line["email"], $line["login"], Config::get(Config::DIGEST_SUBJECT), $digest, $digest_text);
 
 						$rc = $mailer->mail(["to_name" => $line["login"],
 							"to_address" => $line["email"],
-							"subject" => DIGEST_SUBJECT,
+							"subject" => Config::get(Config::DIGEST_SUBJECT),
 							"message" => $digest_text,
 							"message_html" => $digest]);
 
@@ -91,11 +91,11 @@ class Digest
 
 		$tpl->setVariable('CUR_DATE', date('Y/m/d', $local_ts));
 		$tpl->setVariable('CUR_TIME', date('G:i', $local_ts));
-		$tpl->setVariable('TTRSS_HOST', Config::get(Config.Config::get(Config::SELF_URL_PATH)));
+		$tpl->setVariable('TTRSS_HOST', Config::get(Config::get(Config::SELF_URL_PATH)));
 
 		$tpl_t->setVariable('CUR_DATE', date('Y/m/d', $local_ts));
 		$tpl_t->setVariable('CUR_TIME', date('G:i', $local_ts));
-		$tpl_t->setVariable('TTRSS_HOST', Config::get(Config.Config::get(Config::SELF_URL_PATH)));
+		$tpl_t->setVariable('TTRSS_HOST', Config::get(Config::get(Config::SELF_URL_PATH)));
 
 		$affected_ids = array();
 
diff --git a/classes/diskcache.php b/classes/diskcache.php
index 063a3847c..9c594acc5 100644
--- a/classes/diskcache.php
+++ b/classes/diskcache.php
@@ -349,7 +349,7 @@ class DiskCache {
 
 				if ($files) {
 					foreach ($files as $file) {
-						if (time() - filemtime($file) > 86400*CACHE_MAX_DAYS) {
+						if (time() - filemtime($file) > 86400*Config::get(Config::CACHE_MAX_DAYS)) {
 							unlink($file);
 
 							++$num_deleted;
diff --git a/classes/feeds.php b/classes/feeds.php
index 274cb22d0..eaedc1aee 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -1056,11 +1056,11 @@ class Feeds extends Handler_Protected {
 	}
 
 	static function _get_icon_file($feed_id) {
-		return ICONS_DIR . "/$feed_id.ico";
+		return Config::get(Config::ICONS_DIR) . "/$feed_id.ico";
 	}
 
 	static function _has_icon($id) {
-		return is_file(ICONS_DIR . "/$id.ico") && filesize(ICONS_DIR . "/$id.ico") > 0;
+		return is_file(Config::get(Config::ICONS_DIR) . "/$id.ico") && filesize(Config::get(Config::ICONS_DIR) . "/$id.ico") > 0;
 	}
 
 	static function _get_icon($id) {
@@ -1084,7 +1084,7 @@ class Feeds extends Handler_Protected {
 					$icon = self::_get_icon_file($id);
 
                     if ($icon && file_exists($icon)) {
-						return ICONS_URL . "/" . basename($icon) . "?" . filemtime($icon);
+						return Config::get(Config::ICONS_URL) . "/" . basename($icon) . "?" . filemtime($icon);
 					}
 				}
 				break;
diff --git a/classes/logger.php b/classes/logger.php
index cdc6b240a..6cc33314d 100755
--- a/classes/logger.php
+++ b/classes/logger.php
@@ -42,7 +42,7 @@ class Logger {
 	}
 
 	function __construct() {
-		switch (LOG_DESTINATION) {
+		switch (Config::get(Config::LOG_DESTINATION)) {
 		case "sql":
 			$this->adapter = new Logger_SQL();
 			break;
diff --git a/classes/mailer.php b/classes/mailer.php
index 16be16523..93f778210 100644
--- a/classes/mailer.php
+++ b/classes/mailer.php
@@ -11,15 +11,15 @@ class Mailer {
 		$subject = $params["subject"];
 		$message = $params["message"];
 		$message_html = $params["message_html"];
-		$from_name = $params["from_name"] ? $params["from_name"] : SMTP_FROM_NAME;
-		$from_address = $params["from_address"] ? $params["from_address"] : SMTP_FROM_ADDRESS;
+		$from_name = $params["from_name"] ? $params["from_name"] : Config::get(Config::SMTP_FROM_NAME);
+		$from_address = $params["from_address"] ? $params["from_address"] : Config::get(Config::SMTP_FROM_ADDRESS);
 
 		$additional_headers = $params["headers"] ? $params["headers"] : [];
 
 		$from_combined = $from_name ? "$from_name <$from_address>" : $from_address;
 		$to_combined = $to_name ? "$to_name <$to_address>" : $to_address;
 
-		if (defined('_LOG_SENT_MAIL') && _LOG_SENT_MAIL)
+		if (Config::get(Config::LOG_SENT_MAIL))
 			Logger::get()->log(E_USER_NOTICE, "Sending mail from $from_combined to $to_combined [$subject]: $message");
 
 		// HOOK_SEND_MAIL plugin instructions:
diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index 229effeb3..7c3a40647 100755
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -441,7 +441,7 @@ class Pref_Feeds extends Handler_Protected {
 		$sth->execute([$feed_id, $_SESSION['uid']]);
 
 		if ($row = $sth->fetch()) {
-			@unlink(ICONS_DIR . "/$feed_id.ico");
+			@unlink(Config::get(Config::ICONS_DIR) . "/$feed_id.ico");
 
 			$sth = $this->pdo->prepare("UPDATE ttrss_feeds SET favicon_avg_color = NULL, favicon_last_checked = '1970-01-01'
 				where id = ?");
@@ -479,7 +479,7 @@ class Pref_Feeds extends Handler_Protected {
 				$sth->execute([$feed_id, $_SESSION['uid']]);
 
 				if ($row = $sth->fetch()) {
-					$new_filename = ICONS_DIR . "/$feed_id.ico";
+					$new_filename = Config::get(Config::ICONS_DIR) . "/$feed_id.ico";
 
 					if (file_exists($new_filename)) unlink($new_filename);
 
@@ -1228,8 +1228,8 @@ class Pref_Feeds extends Handler_Protected {
 
 			$pdo->commit();
 
-			if (file_exists(ICONS_DIR . "/$id.ico")) {
-				unlink(ICONS_DIR . "/$id.ico");
+			if (file_exists(Config::get(Config::ICONS_DIR) . "/$id.ico")) {
+				unlink(Config::get(Config::ICONS_DIR) . "/$id.ico");
 			}
 
 		} else {
diff --git a/classes/pref/system.php b/classes/pref/system.php
index bc519a321..35c776463 100644
--- a/classes/pref/system.php
+++ b/classes/pref/system.php
@@ -153,10 +153,10 @@ class Pref_System extends Handler_Administrative {
 		<div dojoType='dijit.layout.AccordionContainer' region='center'>
 			<div dojoType='dijit.layout.AccordionPane' style='padding : 0' title='<i class="material-icons">report</i> <?= __('Event Log') ?>'>
 				<?php
-					if (LOG_DESTINATION == "sql") {
+					if (Config::get(Config::LOG_DESTINATION) == "sql") {
 						$this->_log_viewer($page, $severity);
 					} else {
-						print_notice("Please set LOG_DESTINATION to 'sql' in config.php to enable database logging.");
+						print_notice("Please set Config::get(Config::LOG_DESTINATION) to 'sql' in config.php to enable database logging.");
 					}
 				?>
 			</div>
diff --git a/classes/pref/users.php b/classes/pref/users.php
index 5ac6a7990..f30abe001 100644
--- a/classes/pref/users.php
+++ b/classes/pref/users.php
@@ -86,7 +86,7 @@ class Pref_Users extends Handler_Administrative {
 					<?php while ($row = $sth->fetch()) { ?>
 						<li>
 							<?php
-								$icon_file = ICONS_URL . "/" . $row["id"] . ".ico";
+								$icon_file = Config::get(Config::ICONS_URL) . "/" . $row["id"] . ".ico";
 								$icon = file_exists($icon_file) ? $icon_file : "images/blank_icon.gif";
 							?>
 
diff --git a/classes/rpc.php b/classes/rpc.php
index bf24132b0..4aa3f69d5 100755
--- a/classes/rpc.php
+++ b/classes/rpc.php
@@ -165,8 +165,9 @@ class RPC extends Handler_Protected {
 	function setpanelmode() {
 		$wide = (int) clean($_REQUEST["wide"]);
 
+		// FIXME should this use SESSION_COOKIE_LIFETIME and be renewed periodically?
 		setcookie("ttrss_widescreen", (string)$wide,
-			time() + COOKIE_LIFETIME_LONG);
+			time() + 86400*365);
 
 		print json_encode(array("wide" => $wide));
 	}
@@ -328,7 +329,7 @@ class RPC extends Handler_Protected {
 
 		get_version($git_commit, $git_timestamp);
 
-		if (defined('CHECK_FOR_UPDATES') && CHECK_FOR_UPDATES && $_SESSION["access_level"] >= 10 && $git_timestamp) {
+		if (defined('Config::get(Config::CHECK_FOR_UPDATES)') && Config::get(Config::CHECK_FOR_UPDATES) && $_SESSION["access_level"] >= 10 && $git_timestamp) {
 			$content = @UrlHelper::fetch(["url" => "https://tt-rss.org/version.json"]);
 
 			if ($content) {
@@ -359,8 +360,8 @@ class RPC extends Handler_Protected {
 		}
 
 		$params["safe_mode"] = !empty($_SESSION["safe_mode"]);
-		$params["check_for_updates"] = CHECK_FOR_UPDATES;
-		$params["icons_url"] = ICONS_URL;
+		$params["check_for_updates"] = Config::get(Config::CHECK_FOR_UPDATES);
+		$params["icons_url"] = Config::get(Config::ICONS_URL);
 		$params["cookie_lifetime"] = Config::get(Config::SESSION_COOKIE_LIFETIME);
 		$params["default_view_mode"] = get_pref("_DEFAULT_VIEW_MODE");
 		$params["default_view_limit"] = (int) get_pref("_DEFAULT_VIEW_LIMIT");
@@ -390,15 +391,10 @@ class RPC extends Handler_Protected {
 		$params["self_url_prefix"] = get_self_url_prefix();
 		$params["max_feed_id"] = (int) $max_feed_id;
 		$params["num_feeds"] = (int) $num_feeds;
-
 		$params["hotkeys"] = $this->get_hotkeys_map();
-
 		$params["widescreen"] = (int) ($_COOKIE["ttrss_widescreen"] ?? 0);
-
-		$params['simple_update'] = SIMPLE_UPDATE_MODE;
-
+		$params['simple_update'] = Config::get(Config::SIMPLE_UPDATE_MODE);
 		$params["icon_indicator_white"] = $this->image_to_base64("images/indicator_white.gif");
-
 		$params["labels"] = Labels::get_all($_SESSION["uid"]);
 
 		return $params;
@@ -432,7 +428,7 @@ class RPC extends Handler_Protected {
 		$data['cdm_expanded'] = get_pref('CDM_EXPANDED');
 		$data["labels"] = Labels::get_all($_SESSION["uid"]);
 
-		if (LOG_DESTINATION == 'sql' && $_SESSION['access_level'] >= 10) {
+		if (Config::get(Config::LOG_DESTINATION) == 'sql' && $_SESSION['access_level'] >= 10) {
 			if (Config::get(Config::DB_TYPE) == 'pgsql') {
 				$log_interval = "created_at > NOW() - interval '1 hour'";
 			} else {
diff --git a/classes/rssutils.php b/classes/rssutils.php
index c951003f0..5dcbb48d6 100755
--- a/classes/rssutils.php
+++ b/classes/rssutils.php
@@ -34,9 +34,9 @@ class RSSUtils {
 		$pdo = Db::pdo();
 		$sth = $pdo->prepare("SELECT id FROM ttrss_feeds WHERE id = ?");
 
-		// check icon files once every CACHE_MAX_DAYS days
-		$icon_files = array_filter(glob(ICONS_DIR . "/*.ico"),
-			function($f) { return filemtime($f) < time() - 86400*CACHE_MAX_DAYS; });
+		// check icon files once every Config::get(Config::CACHE_MAX_DAYS) days
+		$icon_files = array_filter(glob(Config::get(Config::ICONS_DIR) . "/*.ico"),
+			function($f) { return filemtime($f) < time() - 86400 * Config::get(Config::CACHE_MAX_DAYS); });
 
 		foreach ($icon_files as $icon) {
 			$feed_id = basename($icon, ".ico");
@@ -52,20 +52,22 @@ class RSSUtils {
 		}
 	}
 
-	static function update_daemon_common($limit = DAEMON_FEED_LIMIT, $options = []) {
+	static function update_daemon_common($limit = null, $options = []) {
 		$schema_version = get_schema_version();
 
+		if (!$limit) $limit = Config::get(Config::DAEMON_FEED_LIMIT);
+
 		if ($schema_version != SCHEMA_VERSION) {
 			die("Schema version is wrong, please upgrade the database.\n");
 		}
 
 		$pdo = Db::pdo();
 
-		if (!Config::get(Config::SINGLE_USER_MODE) && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
+		if (!Config::get(Config::SINGLE_USER_MODE) && Config::get(Config::DAEMON_UPDATE_LOGIN_LIMIT) > 0) {
 			if (Config::get(Config::DB_TYPE) == "pgsql") {
-				$login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
+				$login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".Config::get(Config::DAEMON_UPDATE_LOGIN_LIMIT)." days'";
 			} else {
-				$login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
+				$login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".Config::get(Config::DAEMON_UPDATE_LOGIN_LIMIT)." DAY)";
 			}
 		} else {
 			$login_thresh_qpart = "";
@@ -288,7 +290,7 @@ class RSSUtils {
 			if (!$basic_info) {
 				$feed_data = UrlHelper::fetch($fetch_url, false,
 					$auth_login, $auth_pass, false,
-					FEED_FETCH_TIMEOUT,
+					Config::get(Config::FEED_FETCH_TIMEOUT),
 					0);
 
 				$feed_data = trim($feed_data);
@@ -455,7 +457,7 @@ class RSSUtils {
 				Debug::log("not using CURL due to open_basedir restrictions", Debug::$LOG_VERBOSE);
 			}
 
-			if (time() - strtotime($last_unconditional) > MAX_CONDITIONAL_INTERVAL) {
+			if (time() - strtotime($last_unconditional) > Config::get(Config::MAX_CONDITIONAL_INTERVAL)) {
 				Debug::log("maximum allowed interval for conditional requests exceeded, forcing refetch", Debug::$LOG_VERBOSE);
 
 				$force_refetch = true;
@@ -469,7 +471,7 @@ class RSSUtils {
 				"url" => $fetch_url,
 				"login" => $auth_login,
 				"pass" => $auth_pass,
-				"timeout" => $no_cache ? FEED_FETCH_NO_CACHE_TIMEOUT : FEED_FETCH_TIMEOUT,
+				"timeout" => $no_cache ? Config::get(Config::FEED_FETCH_NO_CACHE_TIMEOUT) : Config::get(Config::FEED_FETCH_TIMEOUT),
 				"last_modified" => $force_refetch ? "" : $stored_last_modified
 			]);
 
@@ -591,7 +593,7 @@ class RSSUtils {
 				/* terrible hack: if we crash on floicon shit here, we won't check
 				 * the icon avgcolor again (unless the icon got updated) */
 
-				$favicon_file = ICONS_DIR . "/$feed.ico";
+				$favicon_file = Config::get(Config::ICONS_DIR) . "/$feed.ico";
 				$favicon_modified = file_exists($favicon_file) ? filemtime($favicon_file) : -1;
 
 				Debug::log("checking favicon for feed $feed...", Debug::$LOG_VERBOSE);
@@ -755,7 +757,7 @@ class RSSUtils {
 							$e->type, $e->length, $e->title, $e->width, $e->height);
 
 						// Yet another episode of "mysql utf8_general_ci is gimped"
-						if (Config::get(Config::DB_TYPE) == "mysql" && MYSQL_CHARSET != "UTF8MB4") {
+						if (Config::get(Config::DB_TYPE) == "mysql" && Config::get(Config::MYSQL_CHARSET) != "UTF8MB4") {
 							for ($i = 0; $i < count($e_item); $i++) {
 								if (is_string($e_item[$i])) {
 									$e_item[$i] = self::strip_utf8mb4($e_item[$i]);
@@ -833,7 +835,7 @@ class RSSUtils {
 				Debug::log("plugin data: $entry_plugin_data", Debug::$LOG_VERBOSE);
 
 				// Workaround: 4-byte unicode requires utf8mb4 in MySQL. See https://tt-rss.org/forum/viewtopic.php?f=1&t=3377&p=20077#p20077
-				if (Config::get(Config::DB_TYPE) == "mysql" && MYSQL_CHARSET != "UTF8MB4") {
+				if (Config::get(Config::DB_TYPE) == "mysql" && Config::get(Config::MYSQL_CHARSET) != "UTF8MB4") {
 					foreach ($article as $k => $v) {
 						// i guess we'll have to take the risk of 4byte unicode labels & tags here
 						if (is_string($article[$k])) {
@@ -1298,7 +1300,7 @@ class RSSUtils {
 
 						$file_content = UrlHelper::fetch(array("url" => $src,
 							"http_referrer" => $src,
-							"max_size" => MAX_CACHE_FILE_SIZE));
+							"max_size" => Config::get(Config::MAX_CACHE_FILE_SIZE)));
 
 						if ($file_content) {
 							$cache->put($local_filename, $file_content);
@@ -1328,7 +1330,7 @@ class RSSUtils {
 
 			$file_content = UrlHelper::fetch(array("url" => $url,
 				"http_referrer" => $url,
-				"max_size" => MAX_CACHE_FILE_SIZE));
+				"max_size" => Config::get(Config::MAX_CACHE_FILE_SIZE)));
 
 			if ($file_content) {
 				$cache->put($local_filename, $file_content);
@@ -1643,7 +1645,7 @@ class RSSUtils {
 	}
 
 	static function check_feed_favicon($site_url, $feed) {
-		$icon_file = ICONS_DIR . "/$feed.ico";
+		$icon_file = Config::get(Config::ICONS_DIR) . "/$feed.ico";
 
 		$favicon_url = self::get_favicon_url($site_url);
 		if (!$favicon_url) {
@@ -1654,7 +1656,7 @@ class RSSUtils {
 		// Limiting to "image" type misses those served with text/plain
 		$contents = UrlHelper::fetch([
 			'url' => $favicon_url,
-			'max_size' => MAX_FAVICON_FILE_SIZE,
+			'max_size' => Config::get(Config::MAX_FAVICON_FILE_SIZE),
 			//'type' => 'image',
 		]);
 		if (!$contents) {
diff --git a/classes/urlhelper.php b/classes/urlhelper.php
index 8717d02c3..42aa069e6 100644
--- a/classes/urlhelper.php
+++ b/classes/urlhelper.php
@@ -209,7 +209,7 @@ class UrlHelper {
 		$last_modified = isset($options["last_modified"]) ? $options["last_modified"] : "";
 		$useragent = isset($options["useragent"]) ? $options["useragent"] : false;
 		$followlocation = isset($options["followlocation"]) ? $options["followlocation"] : true;
-		$max_size = isset($options["max_size"]) ? $options["max_size"] : MAX_DOWNLOAD_FILE_SIZE; // in bytes
+		$max_size = isset($options["max_size"]) ? $options["max_size"] : Config::get(Config::MAX_DOWNLOAD_FILE_SIZE); // in bytes
 		$http_accept = isset($options["http_accept"]) ? $options["http_accept"] : false;
 		$http_referrer = isset($options["http_referrer"]) ? $options["http_referrer"] : false;
 
@@ -250,8 +250,8 @@ class UrlHelper {
 			if (count($curl_http_headers) > 0)
 				curl_setopt($ch, CURLOPT_HTTPHEADER, $curl_http_headers);
 
-			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout ? $timeout : FILE_FETCH_CONNECT_TIMEOUT);
-			curl_setopt($ch, CURLOPT_TIMEOUT, $timeout ? $timeout : FILE_FETCH_TIMEOUT);
+			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout ? $timeout : Config::get(Config::FILE_FETCH_CONNECT_TIMEOUT));
+			curl_setopt($ch, CURLOPT_TIMEOUT, $timeout ? $timeout : Config::get(Config::FILE_FETCH_TIMEOUT));
 			curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir") && $followlocation);
 			curl_setopt($ch, CURLOPT_MAXREDIRS, 20);
 			curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
@@ -395,7 +395,7 @@ class UrlHelper {
 						),
 						'method' => 'GET',
 						'ignore_errors' => true,
-						'timeout' => $timeout ? $timeout : FILE_FETCH_TIMEOUT,
+						'timeout' => $timeout ? $timeout : Config::get(Config::FILE_FETCH_TIMEOUT),
 						'protocol_version'=> 1.1)
 				  );
 
@@ -417,7 +417,7 @@ class UrlHelper {
 
 			$old_error = error_get_last();
 
-			$fetch_effective_url = self::resolve_redirects($url, $timeout ? $timeout : FILE_FETCH_CONNECT_TIMEOUT);
+			$fetch_effective_url = self::resolve_redirects($url, $timeout ? $timeout : Config::get(Config::FILE_FETCH_CONNECT_TIMEOUT));
 
 			if (!self::validate($fetch_effective_url, true)) {
 				$fetch_last_error = "URL received after redirection failed extended validation.";