ttrss/classes/pref/prefs.php

<?php

class Pref_Prefs extends Handler_Protected {

	private $pref_help = [];
	private $pref_item_map = [];
	private $pref_blacklist = [];
	private $profile_blacklist = [];

	function csrf_ignore($method) {
		$csrf_ignored = array("index", "updateself", "customizecss", "editprefprofiles", "otpqrcode");

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

	function __construct($args) {
		parent::__construct($args);

		$this->pref_item_map = [
			__('General') => [
				'USER_LANGUAGE',
				'USER_TIMEZONE',
				'BLOCK_SEPARATOR',
				'USER_CSS_THEME',
				'BLOCK_SEPARATOR',
				'ENABLE_API_ACCESS',
			],
			__('Feeds') => [
				'DEFAULT_UPDATE_INTERVAL',
				'FRESH_ARTICLE_MAX_AGE',
				'DEFAULT_SEARCH_LANGUAGE',
				'BLOCK_SEPARATOR',
				'ENABLE_FEED_CATS',
				'BLOCK_SEPARATOR',
				'CONFIRM_FEED_CATCHUP',
				'ON_CATCHUP_SHOW_NEXT_FEED',
				'BLOCK_SEPARATOR',
				'HIDE_READ_FEEDS',
				'HIDE_READ_SHOWS_SPECIAL',
			],
			__('Articles') => [
				'PURGE_OLD_DAYS',
				'PURGE_UNREAD_ARTICLES',
				'BLOCK_SEPARATOR',
				'COMBINED_DISPLAY_MODE',
				'CDM_EXPANDED',
				'BLOCK_SEPARATOR',
				'CDM_AUTO_CATCHUP',
				'VFEED_GROUP_BY_FEED',
				'BLOCK_SEPARATOR',
				'SHOW_CONTENT_PREVIEW',
				'STRIP_IMAGES',
			],
			__('Digest') => [
				'DIGEST_ENABLE',
				'DIGEST_CATCHUP',
				'DIGEST_PREFERRED_TIME',
			],
			__('Advanced') => [
				'BLACKLISTED_TAGS',
				'BLOCK_SEPARATOR',
				'LONG_DATE_FORMAT',
				'SHORT_DATE_FORMAT',
				'BLOCK_SEPARATOR',
				'SSL_CERT_SERIAL',
			]
		];

		$this->pref_help = [
			"ALLOW_DUPLICATE_POSTS" => array(__("Allow duplicate articles"), ""),
			"BLACKLISTED_TAGS" => array(__("Blacklisted tags"), __("Never apply these tags automatically (comma-separated list).")),
			"DEFAULT_SEARCH_LANGUAGE" => array(__("Default language"), __("Used for full-text search")),
			"CDM_AUTO_CATCHUP" => array(__("Mark read on scroll"), __("Mark articles as read as you scroll past them")),
			"CDM_EXPANDED" => array(__("Always expand articles")),
			"COMBINED_DISPLAY_MODE" => array(__("Combined mode"), __("Show flat list of articles instead of separate panels")),
			"CONFIRM_FEED_CATCHUP" => array(__("Confirm marking feeds as read")),
			"DEFAULT_ARTICLE_LIMIT" => array(__("Amount of articles to display at once")),
			"DEFAULT_UPDATE_INTERVAL" => array(__("Default update interval")),
			"DIGEST_CATCHUP" => array(__("Mark sent articles as read")),
			"DIGEST_ENABLE" => array(__("Enable digest"), __("Send daily digest of new (and unread) headlines to your e-mail address")),
			"DIGEST_PREFERRED_TIME" => array(__("Try to send around this time"), __("Time in UTC")),
			"ENABLE_API_ACCESS" => array(__("Enable API"), __("Allows accessing this account through the API")),
			"ENABLE_FEED_CATS" => array(__("Enable categories")),
			"FEEDS_SORT_BY_UNREAD" => array(__("Sort feeds by unread articles count"), ""),
			"FRESH_ARTICLE_MAX_AGE" => array(__("Maximum age of fresh articles"), "<strong>" . __("hours") . "</strong>"),
			"HIDE_READ_FEEDS" => array(__("Hide read feeds")),
			"HIDE_READ_SHOWS_SPECIAL" => array(__("Always show special feeds"), __("While hiding read feeds")),
			"LONG_DATE_FORMAT" => array(__("Long date format"), __("Syntax is identical to PHP <a href='http://php.net/manual/function.date.php'>date()</a> function.")),
			"ON_CATCHUP_SHOW_NEXT_FEED" => array(__("Automatically show next feed"), __("After marking one as read")),
			"PURGE_OLD_DAYS" => array(__("Purge articles older than"), __("<strong>days</strong> (0 disables)")),
			"PURGE_UNREAD_ARTICLES" => array(__("Purge unread articles")),
			"REVERSE_HEADLINES" => array(__("Reverse headline order (oldest first)")),
			"SHORT_DATE_FORMAT" => array(__("Short date format")),
			"SHOW_CONTENT_PREVIEW" => array(__("Show content preview in headlines")),
			"SORT_HEADLINES_BY_FEED_DATE" => array(__("Sort headlines by feed date"), __("Use feed-specified date to sort headlines instead of local import date.")),
			"SSL_CERT_SERIAL" => array(__("SSL client certificate")),
			"STRIP_IMAGES" => array(__("Do not embed media")),
			"STRIP_UNSAFE_TAGS" => array(__("Strip unsafe tags from articles"), __("Strip all but most common HTML tags when reading articles.")),
			"USER_STYLESHEET" => array(__("Customize stylesheet")),
			"USER_TIMEZONE" => array(__("Time zone")),
			"VFEED_GROUP_BY_FEED" => array(__("Group by feed"), __("Group multiple-feed output by originating feed")),
			"USER_LANGUAGE" => array(__("Language")),
			"USER_CSS_THEME" => array(__("Theme"))
		];

		$this->pref_blacklist = ["ALLOW_DUPLICATE_POSTS", "STRIP_UNSAFE_TAGS", "REVERSE_HEADLINES",
			"SORT_HEADLINES_BY_FEED_DATE", "DEFAULT_ARTICLE_LIMIT",
			"FEEDS_SORT_BY_UNREAD", "USER_STYLESHEET"];

		/* "FEEDS_SORT_BY_UNREAD", "HIDE_READ_FEEDS", "REVERSE_HEADLINES" */

		$this->profile_blacklist = ["ALLOW_DUPLICATE_POSTS", "PURGE_OLD_DAYS",
			"PURGE_UNREAD_ARTICLES", "DIGEST_ENABLE", "DIGEST_CATCHUP",
			"BLACKLISTED_TAGS", "ENABLE_API_ACCESS", "UPDATE_POST_ON_CHECKSUM_CHANGE",
			"DEFAULT_UPDATE_INTERVAL", "USER_TIMEZONE", "SORT_HEADLINES_BY_FEED_DATE",
			"SSL_CERT_SERIAL", "DIGEST_PREFERRED_TIME"];
	}

	function changepassword() {

		if (defined('_TTRSS_DEMO_INSTANCE')) {
			print "ERROR: ".format_error("Disabled in demo version.");
			return;
		}

		$old_pw = clean($_POST["old_password"]);
		$new_pw = clean($_POST["new_password"]);
		$new_unclean_pw = $_POST["new_password"];
		$con_pw = clean($_POST["confirm_password"]);

		if ($new_unclean_pw != $new_pw) {
			print "ERROR: ".format_error("New password contains disallowed characters.");
			return;
		}

		if ($old_pw == $new_pw) {
			print "ERROR: ".format_error("New password must be different from the old one.");
			return;
		}

		if ($old_pw == "") {
			print "ERROR: ".format_error("Old password cannot be blank.");
			return;
		}

		if ($new_pw == "") {
			print "ERROR: ".format_error("New password cannot be blank.");
			return;
		}

		if ($new_pw != $con_pw) {
			print "ERROR: ".format_error("Entered passwords do not match.");
			return;
		}

		$authenticator = PluginHost::getInstance()->get_plugin($_SESSION["auth_module"]);

		if (method_exists($authenticator, "change_password")) {
			print format_notice($authenticator->change_password($_SESSION["uid"], $old_pw, $new_pw));
		} else {
			print "ERROR: ".format_error("Function not supported by authentication module.");
		}
	}

	function saveconfig() {
		$boolean_prefs = explode(",", clean($_POST["boolean_prefs"]));

		foreach ($boolean_prefs as $pref) {
			if (!isset($_POST[$pref])) $_POST[$pref] = 'false';
		}

		$need_reload = false;

		foreach (array_keys($_POST) as $pref_name) {

			$value = $_POST[$pref_name];

			switch ($pref_name) {
				case 'DIGEST_PREFERRED_TIME':
					if (get_pref('DIGEST_PREFERRED_TIME') != $value) {

						$sth = $this->pdo->prepare("UPDATE ttrss_users SET
						last_digest_sent = NULL WHERE id = ?");
						$sth->execute([$_SESSION['uid']]);

					}
					break;
				case 'USER_LANGUAGE':
					if (!$need_reload) $need_reload = $_SESSION["language"] != $value;
					break;

				case 'USER_CSS_THEME':
					if (!$need_reload) $need_reload = get_pref($pref_name) != $value;
					break;
			}

			set_pref($pref_name, $value);
		}

		if ($need_reload) {
			print "PREFS_NEED_RELOAD";
		} else {
			print __("The configuration was saved.");
		}
	}

	function changeemail() {

		$email = clean($_POST["email"]);
		$full_name = clean($_POST["full_name"]);
		$active_uid = $_SESSION["uid"];

		$sth = $this->pdo->prepare("SELECT email, login, full_name FROM ttrss_users WHERE id = ?");
		$sth->execute([$active_uid]);

		if ($row = $sth->fetch()) {
			$old_email = $row["email"];

			if ($old_email != $email) {
				$mailer = new Mailer();

				$tpl = new Templator();

				$tpl->readTemplateFromFile("mail_change_template.txt");

				$tpl->setVariable('LOGIN', $row["login"]);
				$tpl->setVariable('NEWMAIL', $email);
				$tpl->setVariable('TTRSS_HOST', SELF_URL_PATH);

				$tpl->addBlock('message');

				$tpl->generateOutputToString($message);

				$mailer->mail(["to_name" => $row["login"],
					"to_address" => $row["email"],
					"subject" => "[tt-rss] Mail address change notification",
					"message" => $message]);

			}
		}

		$sth = $this->pdo->prepare("UPDATE ttrss_users SET email = ?,
			full_name = ? WHERE id = ?");
		$sth->execute([$email, $full_name, $active_uid]);

		print __("Your personal data has been saved.");

		return;
	}

	function resetconfig() {

		$_SESSION["prefs_op_result"] = "reset-to-defaults";

		$sth = $this->pdo->prepare("DELETE FROM ttrss_user_prefs
			WHERE (profile = :profile OR (:profile IS NULL AND profile IS NULL))
				AND owner_uid = :uid");
		$sth->execute([":profile" => $_SESSION['profile'], ":uid" => $_SESSION['uid']]);

		initialize_user_prefs($_SESSION["uid"], $_SESSION["profile"]);

		echo __("Your preferences are now set to default values.");
	}

	function index() {

		global $access_level_names;

		$_SESSION["prefs_op_result"] = "";

		print "<div dojoType='dijit.layout.AccordionContainer' region='center'>";
		print "<div dojoType='dijit.layout.AccordionPane'
			title=\"<i class='material-icons'>person</i> ".__('Personal data / Authentication')."\">";

		print "<div dojoType='dijit.layout.TabContainer'>";
		print "<div dojoType='dijit.layout.ContentPane' title=\"".__('Personal data')."\">";

		print "<form dojoType='dijit.form.Form' id='changeUserdataForm'>";

		print "<script type='dojo/method' event='onSubmit' args='evt'>
		evt.preventDefault();
		if (this.validate()) {
			Notify.progress('Saving data...', true);

			new Ajax.Request('backend.php', {
				parameters: dojo.objectToQuery(this.getValues()),
				onComplete: function(transport) {
					notify_callback2(transport);
			} });

		}
		</script>";

		$sth = $this->pdo->prepare("SELECT email,full_name,otp_enabled,
			access_level FROM ttrss_users
			WHERE id = ?");
		$sth->execute([$_SESSION["uid"]]);
		$row = $sth->fetch();

		$email = htmlspecialchars($row["email"]);
		$full_name = htmlspecialchars($row["full_name"]);
		$otp_enabled = sql_bool_to_bool($row["otp_enabled"]);

		print "<fieldset>";
		print "<label>".__('Full name:')."</label>";
		print "<input dojoType='dijit.form.ValidationTextBox' name='full_name' required='1' value='$full_name'>";
		print "</fieldset>";

		print "<fieldset>";
		print "<label>".__('E-mail:')."</label>";
		print "<input dojoType='dijit.form.ValidationTextBox' name='email' required='1' value='$email'>";
		print "</fieldset>";

		if (!SINGLE_USER_MODE && !$_SESSION["hide_hello"]) {

			$access_level = $row["access_level"];
			print "<fieldset>";
			print "<label>".__('Access level:')."</label>";
			print $access_level_names[$access_level];
			print "</fieldset>";
		}

		print_hidden("op", "pref-prefs");
		print_hidden("method", "changeemail");

		print "<hr/>";

		print "<button dojoType='dijit.form.Button' type='submit' class='alt-primary'>".
			__("Save data")."</button>";

		print "</form>";

		print "</div>"; # content pane

		if ($_SESSION["auth_module"]) {
			$authenticator = PluginHost::getInstance()->get_plugin($_SESSION["auth_module"]);
		} else {
			$authenticator = false;
		}

		print "<div dojoType='dijit.layout.ContentPane' title=\"" . __('Password') . "\">";

		if ($authenticator && method_exists($authenticator, "change_password")) {

			print "<div style='display : none' id='pwd_change_infobox'></div>";

			print "<form dojoType='dijit.form.Form'>";

			print "<script type='dojo/method' event='onSubmit' args='evt'>
			evt.preventDefault();
			if (this.validate()) {
				Notify.progress('Changing password...', true);

				new Ajax.Request('backend.php', {
					parameters: dojo.objectToQuery(this.getValues()),
					onComplete: function(transport) {
						Notify.close();
						if (transport.responseText.indexOf('ERROR: ') == 0) {

							$('pwd_change_infobox').innerHTML =
								transport.responseText.replace('ERROR: ', '');

						} else {
							$('pwd_change_infobox').innerHTML =
								transport.responseText.replace('ERROR: ', '');

							var warn = $('default_pass_warning');
							if (warn) Element.hide(warn);
						}

						new Effect.Appear('pwd_change_infobox');

				}});
				this.reset();
			}
			</script>";

			if ($otp_enabled) {
				print_notice(__("Changing your current password will disable OTP."));
			}

			print "<fieldset>";
			print "<label>" . __("Old password:") . "</label>";
			print "<input dojoType='dijit.form.ValidationTextBox' type='password' required='1' name='old_password'>";
			print "</fieldset>";

			print "<fieldset>";
			print "<label>" . __("New password:") . "</label>";
			print "<input dojoType='dijit.form.ValidationTextBox' type='password' regexp='^[^<>]+' required='1' name='new_password'>";
			print "</fieldset>";

			print "<fieldset>";
			print "<label>" . __("Confirm password:") . "</label>";
			print "<input dojoType='dijit.form.ValidationTextBox' type='password' regexp='^[^<>]+' required='1' name='confirm_password'>";
			print "</fieldset>";

			print_hidden("op", "pref-prefs");
			print_hidden("method", "changepassword");

			print "<hr/>";

			print "<button dojoType='dijit.form.Button' type='submit' class='alt-primary'>" .
				__("Change password") . "</button>";

			print "</form>";

		} else {
			print_notice(T_sprintf("Authentication module used for this session (<b>%s</b>) does not provide an ability to set passwords.",
				$_SESSION["auth_module"]));
		}

		print "</div>"; # content pane

		print "<div dojoType='dijit.layout.ContentPane' title=\"" . __('App passwords') . "\">";

		print_notice("You can create separate passwords for API clients. Using one is required if you enable OTP.");

		print "<div id='app_passwords_holder'>";
		$this->appPasswordList();
		print "</div>";

		print "<hr>";

		print "<button style='float : left' class='alt-primary' dojoType='dijit.form.Button'
			onclick=\"Helpers.AppPasswords.generate()\">" .
			__('Generate new password') . "</button> ";

		print "<button style='float : left' class='alt-danger' dojoType='dijit.form.Button'
			onclick=\"Helpers.AppPasswords.removeSelected()\">" .
			__('Remove selected passwords') . "</button>";

		print "</div>"; # content pane

		print "<div dojoType='dijit.layout.ContentPane' title=\"".__('One time passwords / Authenticator')."\">";

		if ($_SESSION["auth_module"] == "auth_internal") {

			if ($otp_enabled) {

				print_warning("One time passwords are currently enabled. Enter your current password below to disable.");

				print "<form dojoType='dijit.form.Form'>";

				print "<script type='dojo/method' event='onSubmit' args='evt'>
				evt.preventDefault();
				if (this.validate()) {
					Notify.progress('Disabling OTP', true);

					new Ajax.Request('backend.php', {
						parameters: dojo.objectToQuery(this.getValues()),
						onComplete: function(transport) {
							Notify.close();
							if (transport.responseText.indexOf('ERROR: ') == 0) {
								Notify.error(transport.responseText.replace('ERROR: ', ''));
							} else {
								window.location.reload();
							}
					}});
					this.reset();
				}
				</script>";

				print "<fieldset>";
				print "<label>".__("Your password:")."</label>";
				print "<input dojoType='dijit.form.ValidationTextBox' type='password' required='1' name='password'>";
				print "</fieldset>";

				print_hidden("op", "pref-prefs");
				print_hidden("method", "otpdisable");

				print "<hr/>";

				print "<button dojoType='dijit.form.Button' type='submit'>".
					__("Disable OTP")."</button>";

				print "</form>";

			} else {

				print_warning("You will need a compatible Authenticator to use this. Changing your password would automatically disable OTP.");
				print_notice("You will need to generate app passwords for the API clients if you enable OTP.");

				if (function_exists("imagecreatefromstring")) {
					print "<h3>" . __("Scan the following code by the Authenticator application or copy the key manually") . "</h3>";

					$csrf_token_hash = sha1($_SESSION["csrf_token"]);
					print "<img alt='otp qr-code' src='backend.php?op=pref-prefs&method=otpqrcode&csrf_token_hash=$csrf_token_hash'>";
				} else {
					print_error("PHP GD functions are required to generate QR codes.");
					print "<h3>" . __("Use the following OTP key with a compatible Authenticator application") . "</h3>";
				}

				print "<form dojoType='dijit.form.Form' id='changeOtpForm'>";

				$otp_secret = $this->otpsecret();

				print "<fieldset>";
				print "<label>".__("OTP Key:")."</label>";
				print "<input dojoType='dijit.form.ValidationTextBox' disabled='disabled' value='$otp_secret' size='32'>";
				print "</fieldset>";

				print_hidden("op", "pref-prefs");
				print_hidden("method", "otpenable");

				print "<script type='dojo/method' event='onSubmit' args='evt'>
				evt.preventDefault();
				if (this.validate()) {
					Notify.progress('Saving data...', true);

					new Ajax.Request('backend.php', {
						parameters: dojo.objectToQuery(this.getValues()),
						onComplete: function(transport) {
							Notify.close();
							if (transport.responseText.indexOf('ERROR:') == 0) {
								Notify.error(transport.responseText.replace('ERROR:', ''));
							} else {
								window.location.reload();
							}
					} });

				}
				</script>";

				print "<fieldset>";
				print "<label>".__("Your password:")."</label>";
				print "<input dojoType='dijit.form.ValidationTextBox' type='password' required='1'
					name='password'>";
				print "</fieldset>";

				print "<fieldset>";
				print "<label>".__("One time password:")."</label>";
				print "<input dojoType='dijit.form.ValidationTextBox' autocomplete='off'
					required='1' name='otp'>";
				print "</fieldset>";

				print "<hr/>";
				print "<button dojoType='dijit.form.Button' type='submit' class='alt-primary'>".
					__("Enable OTP")."</button>";

				print "</form>";

			}

		} else {
			print_notice("OTP is only available when using <b>auth_internal</b> authentication module.");
		}

		print "</div>"; # content pane

		print "</div>"; # tab container

		PluginHost::getInstance()->run_hooks(PluginHost::HOOK_PREFS_TAB_SECTION,
			"hook_prefs_tab_section", "prefPrefsAuth");

		print "</div>"; #pane

		print "<div dojoType='dijit.layout.AccordionPane' selected='true'
			title=\"<i class='material-icons'>settings</i> ".__('Preferences')."\">";

		print "<form dojoType='dijit.form.Form' id='changeSettingsForm'>";

		print "<script type='dojo/method' event='onSubmit' args='evt, quit'>
		if (evt) evt.preventDefault();
		if (this.validate()) {
			console.log(dojo.objectToQuery(this.getValues()));

			new Ajax.Request('backend.php', {
				parameters: dojo.objectToQuery(this.getValues()),
				onComplete: function(transport) {
					var msg = transport.responseText;
					if (quit) {
						document.location.href = 'index.php';
					} else {
						if (msg == 'PREFS_NEED_RELOAD') {
							window.location.reload();
						} else {
							Notify.info(msg);
						}
					}
			} });
		}
		</script>";

		print '<div dojoType="dijit.layout.BorderContainer" gutters="false">';

		print '<div dojoType="dijit.layout.ContentPane" region="center" style="overflow-y : auto">';

		$profile = $_SESSION["profile"];

		if ($profile) {
			print_notice(__("Some preferences are only available in default profile."));

			initialize_user_prefs($_SESSION["uid"], $profile);
		} else {
			initialize_user_prefs($_SESSION["uid"]);
		}

		$prefs_available = [];

		$sth = $this->pdo->prepare("SELECT DISTINCT
			ttrss_user_prefs.pref_name,value,type_name,
			ttrss_prefs_sections.order_id,
			def_value,section_id
			FROM ttrss_prefs,ttrss_prefs_types,ttrss_prefs_sections,ttrss_user_prefs
			WHERE type_id = ttrss_prefs_types.id AND
				(profile = :profile OR (:profile IS NULL AND profile IS NULL)) AND
				section_id = ttrss_prefs_sections.id AND
				ttrss_user_prefs.pref_name = ttrss_prefs.pref_name AND
				owner_uid = :uid
			ORDER BY ttrss_prefs_sections.order_id,pref_name");
		$sth->execute([":uid" => $_SESSION['uid'], ":profile" => $profile]);

		$listed_boolean_prefs = [];

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

			if (in_array($line["pref_name"], $this->pref_blacklist)) {
				continue;
			}

			if ($profile && in_array($line["pref_name"], $this->profile_blacklist)) {
				continue;
			}

			$pref_name = $line["pref_name"];
			$short_desc = $this->getShortDesc($pref_name);

			if (!$short_desc)
				continue;

			$prefs_available[$pref_name] = [
				'type_name' => $line["type_name"],
				'value' => $line['value'],
				'help_text' => $this->getHelpText($pref_name),
				'short_desc' => $short_desc
			];
		}

		foreach (array_keys($this->pref_item_map) as $section) {

			print "<h2>$section</h2>";

			foreach ($this->pref_item_map[$section] as $pref_name) {

				if ($pref_name == 'BLOCK_SEPARATOR' && !$profile) {
					print "<hr/>";
					continue;
				}

				if ($pref_name == "DEFAULT_SEARCH_LANGUAGE" && DB_TYPE != "pgsql") {
					continue;
				}

				if ($item = $prefs_available[$pref_name]) {

					print "<fieldset class='prefs'>";

					print "<label for='CB_$pref_name'>";
					print $item['short_desc'] . ":";
					print "</label>";

					$value = $item['value'];
					$type_name = $item['type_name'];

					if ($pref_name == "USER_LANGUAGE") {
						print_select_hash($pref_name, $value, get_translations(),
							"style='width : 220px; margin : 0px' dojoType='fox.form.Select'");

					} else if ($pref_name == "USER_TIMEZONE") {

						$timezones = explode("\n", file_get_contents("lib/timezones.txt"));

						print_select($pref_name, $value, $timezones, 'dojoType="dijit.form.FilteringSelect"');
					} else if ($pref_name == "USER_CSS_THEME") {

						$themes = array_merge(glob("themes/*.php"), glob("themes/*.css"), glob("themes.local/*.css"));
						$themes = array_map("basename", $themes);
						$themes = array_filter($themes, "theme_exists");
						asort($themes);

						if (!theme_exists($value)) $value = "";

						print "<select name='$pref_name' id='$pref_name' dojoType='fox.form.Select'>";

						$issel = $value == "" ? "selected='selected'" : "";
						print "<option $issel value=''>".__("default")."</option>";

						foreach ($themes as $theme) {
							$issel = $value == $theme ? "selected='selected'" : "";
							print "<option $issel value='$theme'>$theme</option>";
						}

						print "</select>";

						print " <button dojoType=\"dijit.form.Button\" class='alt-info'
							onclick=\"Helpers.customizeCSS()\">" . __('Customize') . "</button>";

						print " <button dojoType='dijit.form.Button' onclick='window.open(\"https://tt-rss.org/wiki/Themes\")'>
							<i class='material-icons'>open_in_new</i> ".__("More themes...")."</button>";

					} else if ($pref_name == "DEFAULT_UPDATE_INTERVAL") {

						global $update_intervals_nodefault;

						print_select_hash($pref_name, $value, $update_intervals_nodefault,
							'dojoType="fox.form.Select"');
					} else if ($pref_name == "DEFAULT_SEARCH_LANGUAGE") {

						print_select($pref_name, $value, Pref_Feeds::get_ts_languages(),
							'dojoType="fox.form.Select"');

					} else if ($type_name == "bool") {

						array_push($listed_boolean_prefs, $pref_name);

						$checked = ($value == "true") ? "checked=\"checked\"" : "";

						if ($pref_name == "PURGE_UNREAD_ARTICLES" && FORCE_ARTICLE_PURGE != 0) {
							$disabled = "disabled=\"1\"";
							$checked = "checked=\"checked\"";
						} else {
							$disabled = "";
						}

						print "<input type='checkbox' name='$pref_name' $checked $disabled
							dojoType='dijit.form.CheckBox' id='CB_$pref_name' value='1'>";

					} else if (array_search($pref_name, array('FRESH_ARTICLE_MAX_AGE',
							'PURGE_OLD_DAYS', 'LONG_DATE_FORMAT', 'SHORT_DATE_FORMAT')) !== false) {

						$regexp = ($type_name == 'integer') ? 'regexp="^\d*$"' : '';

						if ($pref_name == "PURGE_OLD_DAYS" && FORCE_ARTICLE_PURGE != 0) {
							$disabled = "disabled='1'";
							$value = FORCE_ARTICLE_PURGE;
						} else {
							$disabled = "";
						}

						if ($type_name == 'integer')
							print "<input dojoType=\"dijit.form.NumberSpinner\"
								required='1' $disabled
								name=\"$pref_name\" value=\"$value\">";
						else
							print "<input dojoType=\"dijit.form.TextBox\"
								required='1' $regexp $disabled
								name=\"$pref_name\" value=\"$value\">";

					} else if ($pref_name == "SSL_CERT_SERIAL") {

						print "<input dojoType='dijit.form.ValidationTextBox'
							id='SSL_CERT_SERIAL' readonly='1'
							name=\"$pref_name\" value=\"$value\">";

						$cert_serial = htmlspecialchars(get_ssl_certificate_id());
						$has_serial = ($cert_serial) ? "false" : "true";

						print "<button dojoType='dijit.form.Button' disabled='$has_serial'
							onclick=\"dijit.byId('SSL_CERT_SERIAL').attr('value', '$cert_serial')\">" .
							__('Register') . "</button>";

						print "<button dojoType='dijit.form.Button' class='alt-danger'
							onclick=\"dijit.byId('SSL_CERT_SERIAL').attr('value', '')\">" .
							__('Clear') . "</button>";

						print "<button dojoType='dijit.form.Button' class='alt-info'
							onclick='window.open(\"https://tt-rss.org/wiki/SSL%20Certificate%20Authentication\")'>
							<i class='material-icons'>help</i> ".__("More info...")."</button>";

					} else if ($pref_name == 'DIGEST_PREFERRED_TIME') {
						print "<input dojoType=\"dijit.form.ValidationTextBox\"
							id=\"$pref_name\" regexp=\"[012]?\d:\d\d\" placeHolder=\"12:00\"
							name=\"$pref_name\" value=\"$value\">";

						$item['help_text'] .= ". " . T_sprintf("Current server time: %s", date("H:i"));
					} else {
						$regexp = ($type_name == 'integer') ? 'regexp="^\d*$"' : '';

						print "<input dojoType=\"dijit.form.ValidationTextBox\" $regexp name=\"$pref_name\" value=\"$value\">";
					}

					if ($item['help_text'])
						print "<div class='help-text text-muted'><label for='CB_$pref_name'>".$item['help_text']."</label></div>";

					print "</fieldset>";
				}
			}
		}

		$listed_boolean_prefs = htmlspecialchars(join(",", $listed_boolean_prefs));

		print_hidden("boolean_prefs", "$listed_boolean_prefs");

		PluginHost::getInstance()->run_hooks(PluginHost::HOOK_PREFS_TAB_SECTION,
			"hook_prefs_tab_section", "prefPrefsPrefsInside");

		print '</div>'; # inside pane
		print '<div dojoType="dijit.layout.ContentPane" region="bottom">';

		print_hidden("op", "pref-prefs");
		print_hidden("method", "saveconfig");

		print "<div dojoType=\"fox.form.ComboButton\" type=\"submit\" class=\"alt-primary\">
			<span>".__('Save configuration')."</span>
			<div dojoType=\"dijit.DropDownMenu\">
				<div dojoType=\"dijit.MenuItem\"
					onclick=\"dijit.byId('changeSettingsForm').onSubmit(null, true)\">".
				__("Save and exit preferences")."</div>
			</div>
			</div>";

		print "<button dojoType=\"dijit.form.Button\" onclick=\"return Helpers.editProfiles()\">".
			__('Manage profiles')."</button> ";

		print "<button dojoType=\"dijit.form.Button\" class=\"alt-danger\" onclick=\"return Helpers.confirmReset()\">".
			__('Reset to defaults')."</button>";

		print "&nbsp;";

		PluginHost::getInstance()->run_hooks(PluginHost::HOOK_PREFS_TAB_SECTION,
			"hook_prefs_tab_section", "prefPrefsPrefsOutside");

		print "</form>";
		print '</div>'; # inner pane
		print '</div>'; # border container

		print "</div>"; #pane

		print "<div dojoType=\"dijit.layout.AccordionPane\"
			title=\"<i class='material-icons'>extension</i> ".__('Plugins')."\">";

		print "<form dojoType=\"dijit.form.Form\" id=\"changePluginsForm\">";

		print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
		evt.preventDefault();
		if (this.validate()) {
			Notify.progress('Saving data...', true);

			new Ajax.Request('backend.php', {
				parameters: dojo.objectToQuery(this.getValues()),
				onComplete: function(transport) {
					Notify.close();
					if (confirm(__('Selected plugins have been enabled. Reload?'))) {
						window.location.reload();
					}
			} });

		}
		</script>";

		print_hidden("op", "pref-prefs");
		print_hidden("method", "setplugins");

		print '<div dojoType="dijit.layout.BorderContainer" gutters="false">';
		print '<div dojoType="dijit.layout.ContentPane" region="center" style="overflow-y : auto">';

		if (ini_get("open_basedir") && function_exists("curl_init") && !defined("NO_CURL")) {
			print_warning("Your PHP configuration has open_basedir restrictions enabled. Some plugins relying on CURL for functionality may not work correctly.");
		}

		$feed_handler_whitelist = [ "Af_Comics" ];

		$feed_handlers = array_merge(
			PluginHost::getInstance()->get_hooks(PluginHost::HOOK_FEED_FETCHED),
			PluginHost::getInstance()->get_hooks(PluginHost::HOOK_FEED_PARSED),
			PluginHost::getInstance()->get_hooks(PluginHost::HOOK_FETCH_FEED));

		$feed_handlers = array_filter($feed_handlers, function($plugin) use ($feed_handler_whitelist) {
			return in_array(get_class($plugin), $feed_handler_whitelist) === false; });

		if (count($feed_handlers) > 0) {
			print_error(
				T_sprintf("The following plugins use per-feed content hooks. This may cause excessive data usage and origin server load resulting in a ban of your instance: <b>%s</b>" ,
					implode(", ", array_map(function($plugin) { return get_class($plugin); }, $feed_handlers))
				) . " (<a href='https://tt-rss.org/wiki/FeedHandlerPlugins' target='_blank'>".__("More info...")."</a>)"
			);
		}

		print "<h2>".__("System plugins")."</h2>";
		print_notice("System plugins are enabled in <strong>config.php</strong> for all users.");

		$system_enabled = array_map("trim", explode(",", PLUGINS));
		$user_enabled = array_map("trim", explode(",", get_pref("_ENABLED_PLUGINS")));

		$tmppluginhost = new PluginHost();
		$tmppluginhost->load_all($tmppluginhost::KIND_ALL, $_SESSION["uid"], true);
		$tmppluginhost->load_data(true);

		foreach ($tmppluginhost->get_plugins() as $name => $plugin) {
			$about = $plugin->about();

			if ($about[3]) {
				if (in_array($name, $system_enabled)) {
					$checked = "checked='1'";
				} else {
					$checked = "";
				}

				print "<fieldset class='prefs plugin'>
					<label>$name:</label>
					<label class='checkbox description text-muted' id='PLABEL-$name'>
						<input disabled='1'
							dojoType='dijit.form.CheckBox' $checked type='checkbox'>
						".htmlspecialchars($about[1]). "</label>";

					if (@$about[4]) {
						print "<button dojoType='dijit.form.Button' class='alt-info'
							onclick='window.open(\"".htmlspecialchars($about[4])."\")'>
								<i class='material-icons'>open_in_new</i> ".__("More info...")."</button>";
					}

					print "<div dojoType='dijit.Tooltip' connectId='PLABEL-$name' position='after'>".
						htmlspecialchars(T_sprintf("v%.2f, by %s", $about[0], $about[2])).
						"</div>";

				print "</fieldset>";

			}
		}

		print "<h2>".__("User plugins")."</h2>";

		foreach ($tmppluginhost->get_plugins() as $name => $plugin) {
			$about = $plugin->about();

			if (!$about[3]) {

				$checked = "";
				$disabled = "";

				if (in_array($name, $system_enabled)) {
					$checked = "checked='1'";
					$disabled = "disabled='1'";
				} else if (in_array($name, $user_enabled)) {
					$checked = "checked='1'";
				}

				print "<fieldset class='prefs plugin'>
					<label>$name:</label>
					<label class='checkbox description text-muted' id='PLABEL-$name'>
						<input name='plugins[]' value='$name' dojoType='dijit.form.CheckBox' $checked $disabled type='checkbox'>
						".htmlspecialchars($about[1])."</label>";

				if (count($tmppluginhost->get_all($plugin)) > 0) {
					if (in_array($name, $system_enabled) || in_array($name, $user_enabled)) {
						print " <button dojoType='dijit.form.Button'
							onclick=\"Helpers.clearPluginData('$name')\">
								<i class='material-icons'>clear</i> ".__("Clear data")."</button>";
					}
				}

				if (@$about[4]) {
					print " <button dojoType='dijit.form.Button' class='alt-info'
							onclick='window.open(\"".htmlspecialchars($about[4])."\")'>
								<i class='material-icons'>open_in_new</i> ".__("More info...")."</button>";
				}

				print "<div dojoType='dijit.Tooltip' connectId='PLABEL-$name' position='after'>".
					htmlspecialchars(T_sprintf("v%.2f, by %s", $about[0], $about[2])).
					"</div>";

				print "</fieldset>";
			}
		}

		print "</div>"; #content-pane
		print '<div dojoType="dijit.layout.ContentPane" region="bottom">';

		print "<button dojoType='dijit.form.Button' style='float : left' class='alt-info' onclick='window.open(\"https://tt-rss.org/wiki/Plugins\")'>
			<i class='material-icons'>help</i> ".__("More info...")."</button>";

		print "<button dojoType='dijit.form.Button' class='alt-primary' type='submit'>".
			__("Enable selected plugins")."</button>";
		print "</div>"; #pane

		print "</div>"; #pane
		print "</div>"; #border-container

		print "</form>";

		PluginHost::getInstance()->run_hooks(PluginHost::HOOK_PREFS_TAB,
			"hook_prefs_tab", "prefPrefs");

		print "</div>"; #container

	}

	function toggleAdvanced() {
		$_SESSION["prefs_show_advanced"] = !$_SESSION["prefs_show_advanced"];
	}

	function otpsecret() {
		$sth = $this->pdo->prepare("SELECT salt, otp_enabled
			FROM ttrss_users
			WHERE id = ?");
		$sth->execute([$_SESSION['uid']]);

		if ($row = $sth->fetch()) {
			$otp_enabled = sql_bool_to_bool($row["otp_enabled"]);

			if (!$otp_enabled) {
				$base32 = new \OTPHP\Base32();
				$secret = $base32->encode(mb_substr(sha1($row["salt"]), 0, 12), false);

				return $secret;
			}
		}

		return false;
	}

	function otpqrcode() {
		$csrf_token_hash = clean($_REQUEST["csrf_token_hash"]);

		if (sha1($_SESSION["csrf_token"]) === $csrf_token_hash) {
			require_once "lib/phpqrcode/phpqrcode.php";

			$sth = $this->pdo->prepare("SELECT login
				FROM ttrss_users
				WHERE id = ?");
			$sth->execute([$_SESSION['uid']]);

			if ($row = $sth->fetch()) {
				$secret = $this->otpsecret();
				$login = $row['login'];

				if ($secret) {
					QRcode::png("otpauth://totp/".urlencode($login).
						"?secret=$secret&issuer=".urlencode("Tiny Tiny RSS"));
				}
			}
		} else {
			header("Content-Type: text/json");
			print error_json(6);
		}
	}

	function otpenable() {

		$password = clean($_REQUEST["password"]);
		$otp = clean($_REQUEST["otp"]);

		$authenticator = PluginHost::getInstance()->get_plugin($_SESSION["auth_module"]);

		if ($authenticator->check_password($_SESSION["uid"], $password)) {

			$secret = $this->otpsecret();

			if ($secret) {

				$base32 = new \OTPHP\Base32();

				$topt = new \OTPHP\TOTP($secret);

				$otp_check = $topt->now();

				if ($otp == $otp_check) {
					$sth = $this->pdo->prepare("UPDATE ttrss_users
					SET otp_enabled = true WHERE id = ?");

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

					print "OK";
				} else {
					print "ERROR:".__("Incorrect one time password");
				}
			}

		} else {
			print "ERROR:".__("Incorrect password");
		}

	}

	static function isdefaultpassword() {
		$authenticator = PluginHost::getInstance()->get_plugin($_SESSION["auth_module"]);

		if ($authenticator &&
                method_exists($authenticator, "check_password") &&
                $authenticator->check_password($_SESSION["uid"], "password")) {

			return true;
		}

		return false;
	}

	function otpdisable() {
		$password = clean($_REQUEST["password"]);

		$authenticator = PluginHost::getInstance()->get_plugin($_SESSION["auth_module"]);

		if ($authenticator->check_password($_SESSION["uid"], $password)) {

			$sth = $this->pdo->prepare("SELECT email, login FROM ttrss_users WHERE id = ?");
			$sth->execute([$_SESSION['uid']]);

			if ($row = $sth->fetch()) {
				$mailer = new Mailer();

				$tpl = new Templator();

				$tpl->readTemplateFromFile("otp_disabled_template.txt");

				$tpl->setVariable('LOGIN', $row["login"]);
				$tpl->setVariable('TTRSS_HOST', SELF_URL_PATH);

				$tpl->addBlock('message');

				$tpl->generateOutputToString($message);

				$mailer->mail(["to_name" => $row["login"],
					"to_address" => $row["email"],
					"subject" => "[tt-rss] OTP change notification",
					"message" => $message]);
			}

			$sth = $this->pdo->prepare("UPDATE ttrss_users SET otp_enabled = false WHERE
				id = ?");
			$sth->execute([$_SESSION['uid']]);

			print "OK";
		} else {
			print "ERROR: ".__("Incorrect password");
		}

	}

	function setplugins() {
		if (is_array(clean($_REQUEST["plugins"])))
			$plugins = join(",", clean($_REQUEST["plugins"]));
		else
			$plugins = "";

		set_pref("_ENABLED_PLUGINS", $plugins);
	}

	function clearplugindata() {
		$name = clean($_REQUEST["name"]);

		PluginHost::getInstance()->clear_data(PluginHost::getInstance()->get_plugin($name));
	}

	function customizeCSS() {
		$value = get_pref("USER_STYLESHEET");
		$value = str_replace("<br/>", "\n", $value);

		print_notice(__("You can override colors, fonts and layout of your currently selected theme with custom CSS declarations here."));

		print_hidden("op", "rpc");
		print_hidden("method", "setpref");
		print_hidden("key", "USER_STYLESHEET");

		print "<div id='css_edit_apply_msg' style='display : none'>";
		print_warning(__("User CSS has been applied, you might need to reload the page to see all changes."));
		print "</div>";

		print "<textarea class='panel user-css-editor' dojoType='dijit.form.SimpleTextarea'
			style='font-size : 12px;' name='value'>$value</textarea>";

		print "<footer>";
		print "<button dojoType='dijit.form.Button' class='alt-success'
			onclick=\"dijit.byId('cssEditDlg').apply()\">".__('Apply')."</button> ";
		print "<button dojoType='dijit.form.Button' class='alt-primary'
			onclick=\"dijit.byId('cssEditDlg').execute()\">".__('Save and reload')."</button> ";
		print "<button dojoType='dijit.form.Button'
			onclick=\"dijit.byId('cssEditDlg').hide()\">".__('Cancel')."</button>";
		print "</footer>";

	}

	function editPrefProfiles() {
		print "<div dojoType='fox.Toolbar'>";

		print "<div dojoType='fox.form.DropDownButton'>".
				"<span>" . __('Select')."</span>";
		print "<div dojoType='dijit.Menu' style='display: none'>";
		print "<div onclick=\"Tables.select('pref-profiles-list', true)\"
			dojoType='dijit.MenuItem'>".__('All')."</div>";
		print "<div onclick=\"Tables.select('pref-profiles-list', false)\"
			dojoType='dijit.MenuItem'>".__('None')."</div>";
		print "</div></div>";

		print "<div style='float : right'>";

		print "<input name='newprofile' dojoType='dijit.form.ValidationTextBox'
				required='1'>
			<button dojoType='dijit.form.Button'
			onclick=\"dijit.byId('profileEditDlg').addProfile()\">".
				__('Create profile')."</button></div>";

		print "</div>";

		$sth = $this->pdo->prepare("SELECT title,id FROM ttrss_settings_profiles
			WHERE owner_uid = ? ORDER BY title");
		$sth->execute([$_SESSION['uid']]);

		print "<div class='panel panel-scrollable'>";

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

		print "<table width='100%' id='pref-profiles-list'>";

		print "<tr>"; # data-row-id='0' <-- no point, shouldn't be removed

		print "<td><input onclick='Tables.onRowChecked(this);' dojoType='dijit.form.CheckBox' type='checkbox'></td>";

		if (!$_SESSION["profile"]) {
			$is_active = __("(active)");
		} else {
			$is_active = "";
		}

		print "<td width='100%'><span>" . __("Default profile") . " $is_active</span></td>";

		print "</tr>";

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

			$profile_id = $line["id"];

			print "<tr data-row-id='$profile_id'>";

			$edit_title = htmlspecialchars($line["title"]);

			print "<td><input onclick='Tables.onRowChecked(this);' dojoType='dijit.form.CheckBox' type='checkbox'></td>";

			if ($_SESSION["profile"] == $line["id"]) {
				$is_active = __("(active)");
			} else {
				$is_active = "";
			}

			print "<td><span dojoType='dijit.InlineEditBox'
				width='300px' autoSave='false'
				profile-id='$profile_id'>" . $edit_title .
				"<script type='dojo/method' event='onChange' args='item'>
					var elem = this;
					dojo.xhrPost({
						url: 'backend.php',
						content: {op: 'rpc', method: 'saveprofile',
							value: this.value,
							id: this.srcNodeRef.getAttribute('profile-id')},
							load: function(response) {
								elem.attr('value', response);
						}
					});
				</script>
			</span> $is_active</td>";

			print "</tr>";
		}

		print "</table>";
		print "</form>";
		print "</div>";

		print "<footer>
			<button style='float : left' class='alt-danger' dojoType=\"dijit.form.Button\" onclick=\"dijit.byId('profileEditDlg').removeSelected()\">".
			__('Remove selected profiles')."</button>
			<button dojoType='dijit.form.Button' class='alt-primary' type='submit' onclick=\"dijit.byId('profileEditDlg').activateProfile()\">".
			__('Activate profile')."</button>
			<button dojoType='dijit.form.Button' onclick=\"dijit.byId('profileEditDlg').hide()\">".
			__('Cancel')."</button>";
		print "</footer>";

	}

	private function getShortDesc($pref_name) {
		if (isset($this->pref_help[$pref_name])) {
			return $this->pref_help[$pref_name][0];
		}
		return "";
	}

	private function getHelpText($pref_name) {
		if (isset($this->pref_help[$pref_name])) {
			return $this->pref_help[$pref_name][1];
		}
		return "";
	}

	private function appPasswordList() {
		print "<div dojoType='fox.Toolbar'>";
		print "<div dojoType='fox.form.DropDownButton'>" .
			"<span>" . __('Select') . "</span>";
		print "<div dojoType='dijit.Menu' style='display: none'>";
		print "<div onclick=\"Tables.select('app-password-list', true)\"
				dojoType=\"dijit.MenuItem\">" . __('All') . "</div>";
		print "<div onclick=\"Tables.select('app-password-list', false)\"
				dojoType=\"dijit.MenuItem\">" . __('None') . "</div>";
		print "</div></div>";
		print "</div>"; #toolbar

		print "<div class='panel panel-scrollable'>";
		print "<table width='100%' id='app-password-list'>";
		print "<tr>";
		print "<th width='2%'></th>";
		print "<th align='left'>".__("Description")."</th>";
		print "<th align='right'>".__("Created")."</th>";
		print "<th align='right'>".__("Last used")."</th>";
		print "</tr>";

		$sth = $this->pdo->prepare("SELECT id, title, created, last_used
			FROM ttrss_app_passwords WHERE owner_uid = ?");
		$sth->execute([$_SESSION['uid']]);

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

			$row_id = $row["id"];

			print "<tr data-row-id='$row_id'>";

			print "<td align='center'>
						<input onclick='Tables.onRowChecked(this)' dojoType='dijit.form.CheckBox' type='checkbox'></td>";
			print "<td>" . htmlspecialchars($row["title"]) . "</td>";

			print "<td align='right' class='text-muted'>";
			print make_local_datetime($row['created'], false);
			print "</td>";

			print "<td align='right' class='text-muted'>";
			print make_local_datetime($row['last_used'], false);
			print "</td>";

			print "</tr>";
		}

		print "</table>";
		print "</div>";
	}

	private function encryptAppPassword($password) {
		$salt = substr(bin2hex(get_random_bytes(24)), 0, 24);

		return "SSHA-512:".hash('sha512', $salt . $password). ":$salt";
	}

	function deleteAppPassword() {
		$ids = explode(",", clean($_REQUEST['ids']));
		$ids_qmarks = arr_qmarks($ids);

		$sth = $this->pdo->prepare("DELETE FROM ttrss_app_passwords WHERE id IN ($ids_qmarks) AND owner_uid = ?");
		$sth->execute(array_merge($ids, [$_SESSION['uid']]));

		$this->appPasswordList();
	}

	function generateAppPassword() {
		$title = clean($_REQUEST['title']);
		$new_password = make_password(16);
		$new_password_hash = $this->encryptAppPassword($new_password);

		print_warning(T_sprintf("Generated password <strong>%s</strong> for %s. Please remember it for future reference.", $new_password, $title));

		$sth = $this->pdo->prepare("INSERT INTO ttrss_app_passwords
    			(title, pwd_hash, service, created, owner_uid)
    		 VALUES
    		    (?, ?, ?, NOW(), ?)");

		$sth->execute([$title, $new_password_hash, Auth_Base::AUTH_SERVICE_API, $_SESSION['uid']]);

		$this->appPasswordList();
	}
}