+ $request = [];
+
+ foreach ($defaults as $parameter => $defaultvalue) {
+ $request[$parameter] = $this->getRequestValue($input, $parameter, $defaultvalue);
+ }
+
+ foreach ($input ?? [] as $parameter => $value) {
+ if ($parameter == 'pagename') {
+ continue;
+ }
+ if (!in_array($parameter, array_keys($defaults))) {
+ $this->logger->notice('Unhandled request field', ['parameter' => $parameter, 'value' => $value, 'command' => $this->args->getCommand()]);
+ }
+ }
+
+ $this->logger->debug('Got request parameters', ['request' => $request, 'command' => $this->args->getCommand()]);
+ return $request;
+ }
+
+ /**
+ * Fetch a request value and apply default values and check against minimal and maximal values
+ *
+ * @param array $input
+ * @param string $parameter
+ * @param mixed $default
+ * @param mixed $minimal_value
+ * @param mixed $maximum_value
+ * @return mixed
+ */
+ public function getRequestValue(array $input, string $parameter, $default = null, $minimal_value = null, $maximum_value = null)
+ {
+ if (is_string($default)) {
+ $value = (string)($input[$parameter] ?? $default);
+ } elseif (is_int($default)) {
+ $value = filter_var($input[$parameter] ?? $default, FILTER_VALIDATE_INT);
+ if (!is_null($minimal_value)) {
+ $value = max(filter_var($minimal_value, FILTER_VALIDATE_INT), $value);
+ }
+ if (!is_null($maximum_value)) {
+ $value = min(filter_var($maximum_value, FILTER_VALIDATE_INT), $value);
+ }
+ } elseif (is_float($default)) {
+ $value = filter_var($input[$parameter] ?? $default, FILTER_VALIDATE_FLOAT);
+ if (!is_null($minimal_value)) {
+ $value = max(filter_var($minimal_value, FILTER_VALIDATE_FLOAT), $value);
+ }
+ if (!is_null($maximum_value)) {
+ $value = min(filter_var($maximum_value, FILTER_VALIDATE_FLOAT), $value);
+ }
+ } elseif (is_array($default)) {
+ $value = filter_var($input[$parameter] ?? $default, FILTER_DEFAULT, ['flags' => FILTER_FORCE_ARRAY]);
+ } elseif (is_bool($default)) {
+ $value = filter_var($input[$parameter] ?? $default, FILTER_VALIDATE_BOOLEAN);
+ } elseif (is_null($default)) {
+ $value = $input[$parameter] ?? null;
+ } else {
+ $this->logger->notice('Unhandled default value type', ['parameter' => $parameter, 'type' => gettype($default)]);
+ $value = null;
+ }
+
+ return $value;
+ }
+
+ /*
+ * Functions used to protect against Cross-Site Request Forgery
+ * The security token has to base on at least one value that an attacker can't know - here it's the session ID and the private key.
+ * In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes;
+ * or if the security token is used for ajax-calls that happen several times), but only valid for a certain amount of time (3hours).
+ * The "typename" separates the security tokens of different types of forms. This could be relevant in the following case:
+ * A security token is used to protect a link from CSRF (e.g. the "delete this profile"-link).
+ * If the new page contains by any chance external elements, then the used security token is exposed by the referrer.
+ * Actually, important actions should not be triggered by Links / GET-Requests at all, but sometimes they still are,
+ * so this mechanism brings in some damage control (the attacker would be able to forge a request to a form of this type, but not to forms of other types).
+ */
+ public static function getFormSecurityToken($typename = '')
+ {
+ $user = User::getById(DI::app()->getLoggedInUserId(), ['guid', 'prvkey']);
+ $timestamp = time();
+ $sec_hash = hash('whirlpool', ($user['guid'] ?? '') . ($user['prvkey'] ?? '') . session_id() . $timestamp . $typename);
+
+ return $timestamp . '.' . $sec_hash;
+ }
+
+ public static function checkFormSecurityToken($typename = '', $formname = 'form_security_token')
+ {
+ $hash = null;
+
+ if (!empty($_REQUEST[$formname])) {
+ /// @TODO Careful, not secured!
+ $hash = $_REQUEST[$formname];
+ }
+
+ if (!empty($_SERVER['HTTP_X_CSRF_TOKEN'])) {
+ /// @TODO Careful, not secured!
+ $hash = $_SERVER['HTTP_X_CSRF_TOKEN'];
+ }
+
+ if (empty($hash)) {
+ return false;
+ }
+
+ $max_livetime = 10800; // 3 hours
+
+ $user = User::getById(DI::app()->getLoggedInUserId(), ['guid', 'prvkey']);
+
+ $x = explode('.', $hash);
+ if (time() > (intval($x[0]) + $max_livetime)) {
+ return false;
+ }
+
+ $sec_hash = hash('whirlpool', ($user['guid'] ?? '') . ($user['prvkey'] ?? '') . session_id() . $x[0] . $typename);
+
+ return ($sec_hash == $x[1]);
+ }
+
+ public static function getFormSecurityStandardErrorMessage()
+ {
+ return DI::l10n()->t("The form security token was not correct. This probably happened because the form has been opened for too long \x28>3 hours\x29 before submitting it.") . EOL;
+ }
+
+ public static function checkFormSecurityTokenRedirectOnError($err_redirect, $typename = '', $formname = 'form_security_token')
+ {
+ if (!self::checkFormSecurityToken($typename, $formname)) {
+ Logger::notice('checkFormSecurityToken failed: user ' . DI::app()->getLoggedInUserNickname() . ' - form element ' . $typename);
+ Logger::debug('checkFormSecurityToken failed', ['request' => $_REQUEST]);
+ notice(self::getFormSecurityStandardErrorMessage());
+ DI::baseUrl()->redirect($err_redirect);
+ }
+ }
+
+ public static function checkFormSecurityTokenForbiddenOnError($typename = '', $formname = 'form_security_token')
+ {
+ if (!self::checkFormSecurityToken($typename, $formname)) {
+ Logger::notice('checkFormSecurityToken failed: user ' . DI::app()->getLoggedInUserNickname() . ' - form element ' . $typename);
+ Logger::debug('checkFormSecurityToken failed', ['request' => $_REQUEST]);
+
+ throw new \Friendica\Network\HTTPException\ForbiddenException();
+ }
+ }
+
+ protected static function getContactFilterTabs(string $baseUrl, string $current, bool $displayCommonTab)
+ {
+ $tabs = [
+ [
+ 'label' => DI::l10n()->t('All contacts'),
+ 'url' => $baseUrl . '/contacts',
+ 'sel' => !$current || $current == 'all' ? 'active' : '',
+ ],
+ [
+ 'label' => DI::l10n()->t('Followers'),
+ 'url' => $baseUrl . '/contacts/followers',
+ 'sel' => $current == 'followers' ? 'active' : '',
+ ],
+ [
+ 'label' => DI::l10n()->t('Following'),
+ 'url' => $baseUrl . '/contacts/following',
+ 'sel' => $current == 'following' ? 'active' : '',
+ ],
+ [
+ 'label' => DI::l10n()->t('Mutual friends'),
+ 'url' => $baseUrl . '/contacts/mutuals',
+ 'sel' => $current == 'mutuals' ? 'active' : '',
+ ],
+ ];
+
+ if ($displayCommonTab) {
+ $tabs[] = [
+ 'label' => DI::l10n()->t('Common'),
+ 'url' => $baseUrl . '/contacts/common',
+ 'sel' => $current == 'common' ? 'active' : '',
+ ];
+ }