<?php
/*
* OIDplus 2.0
* Copyright 2019 - 2021 Daniel Marschall, ViaThinkSoft
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
class OIDplusLogger {
private static function split_maskcodes($maskcodes) {
// This function splits a mask code containing multiple components
// (delimited by '+' or '/') in single components
// It takes care that '+' and '/' inside brackets won't be used to split the codes
// Also, brackets can be escaped.
// The severity block (optional, must be standing in front of a component)
// is handled too. Inside the severity block, you may only use '/' to split components.
// The severity block will be implicitly repeated from the previous components if a component
// does not feature one.
//
// "[S]AAA(BBB)+CCC(DDD)" ==> array(
// array(array("S"),"AAA(BBB)"),
// array(array("S"),"CCC(DDD)")
// )
// "[S]AAA(B+BB)+CCC(DDD)" ==> array(
// array(array("S"),"AAA(B+BB)"),
// array(array("S"),"CCC(DDD)")
// )
// "[S]AAA(B\)BB)+CCC(DDD)" ==> array(
// array(array("S"),"AAA(B\)BB)"),
// array(array("S"),"CCC(DDD)")
// )
$sevs = array(); // Note: The severity block will repeat for the next components if not changed explicitly
$code = '';
$sev = '';
$bracket_level = 0;
$is_escaping = false;
$inside_severity_block = false;
for ($i=0; $i<strlen($maskcodes); $i++) { $char = $maskcodes[$i];
if ($inside_severity_block) {
// Severity block (optional)
// e.g. [?WARN/!OK] ==> $sevs = array("?WARN", "!OK")
if ($char == '\\') {
if ($is_escaping) {
$is_escaping = false;
$sev .= $char;
} else {
$is_escaping = true;
}
}
else if ($char == '[') {
if ($is_escaping) {
$is_escaping = false;
} else {
$bracket_level++;
}
$sev .= $char;
}
else if ($char == ']') {
if ($is_escaping) {
$is_escaping = false;
$sev .= $char;
} else {
$bracket_level--;
if ($bracket_level < 0) return false;
if ($bracket_level == 0) {
$inside_severity_block = false;
if ($sev != '') $sevs[] = $sev;
$sev = '';
} else {
$sev .= $char;
}
}
}
else if ((($char == '/')) && ($bracket_level == 1)) {
if ($is_escaping) {
$is_escaping = false;
$sev .= $char;
} else {
if ($sev != '') $sevs[] = $sev;
$sev = '';
}
} else {
if ($is_escaping) {
// This would actually be an error, because we cannot escape this
$is_escaping = false;
$sev .= '\\' . $char;
} else {
$sev .= $char;
}
}
} else {
// Normal data (after the severity block)
if (($char == '[') && ($code == '')) {
$inside_severity_block = true;
$bracket_level++;
}
else if ($char == '\\') {
if ($is_escaping) {
$is_escaping = false;
$code .= $char;
} else {
$is_escaping = true;
}
}
else if ($char == '(') {
if ($is_escaping) {
$is_escaping = false;
} else {
$bracket_level++;
}
$code .= $char;
}
else if ($char == ')') {
if ($is_escaping) {
$is_escaping = false;
} else {
$bracket_level--;
if ($bracket_level < 0) return false;
}
$code .= $char;
}
else if ((($char == '+') || ($char == '/')) && ($bracket_level == 0)) {
if ($is_escaping) {
$is_escaping = false;
$code .= $char;
} else {
if ($code != '') $out[] = array($sevs,$code); $code = '';
}
} else {
if ($is_escaping) {
// This would actually be an error, because we cannot escape this
$is_escaping = false;
$code .= '\\' . $char;
} else {
$code .= $char;
}
}
}
}
if ($code != '') $out[] = array($sevs,$code); if ($inside_severity_block) return false;
return $out;
}
public static
function log($maskcodes, $event) { $loggerPlugins = OIDplus::getLoggerPlugins();
if (count($loggerPlugins) == 0) return false;
// What is a mask code?
// A mask code gives information about the log event:
// 1. The severity (info, warning, error)
// 2. In which logbook(s) the event shall be placed
// Example:
// The event would be:
// "Person 'X' moves from house 'A' to house 'B'"
// This event would affect the person X and the two houses,
// so, instead of logging into 3 logbooks separately,
// you would create a mask code that tells the system
// to put the message into the logbooks of person X,
// house A and house B.
// A mask code with multiple components is split into single codes
// using '+' or '/', e.g. "OID(x)+RA(x)" would be split to "OID(x)" and "RA(x)"
// which would result in the message being placed in the logbook of OID x,
// and the logbook of the RA owning OID x.
$maskcodes_ary = self::split_maskcodes($maskcodes);
if ($maskcodes_ary === false) {
throw new OIDplusException(_L('Invalid maskcode "%1" (failed to split)',$maskcodes));
}
foreach ($maskcodes_ary as list($sevs,$maskcode)) { // At the beginning of each mask code, you can define a severity.
// If you have a mask code with multiple components, you don't have to place the
// severity for each component. You can just leave it at the beginning.
// e.g. "[WARN]OID(x)+RA(x)" is equal to "[WARN]OID(x)+[WARN]RA(x)"
// You can also put different severities for the components:
// e.g. "[INFO]OID(x)+[WARN]RA(x)" would be a info for the OID, but a warning for the RA.
// If you want to make the severity dependent on wheather the user is logged in or not,
// prepend "?" or "!" and use '/' as delimiter
// Example: "[?WARN/!OK]RA(x)" means: If RA is not logged in, it is a warning; if it is logged in, it is an success
$severity = 0; // default severity = none
$severity_online = 0;
foreach ($sevs as $sev) {
// [OK] = Success
// Numeric value: 1
// Rule of thumb: YOU have done something and it was successful
case '?OK':
$severity_online = 1;
break;
case '!OK':
case 'OK':
$severity = 1;
break;
// [INFO] = Informational
// Numeric value: 2
// Rule of thumb: Someone else has done something (that affects you) and it was successful
case '?INFO':
$severity_online = 2;
break;
case '!INFO':
case 'INFO':
$severity = 2;
break;
// [WARN] = Warning
// Numeric value: 3
// Rule of thumb: Something happened (probably someone did something) and it affects you
case '?WARN':
$severity_online = 3;
break;
case '!WARN':
case 'WARN':
$severity = 3;
break;
// [ERR] = Error
// Numeric value: 4
// Rule of thumb: Something failed (probably someone did something) and it affects you
case '?ERR':
$severity_online = 4;
break;
case '!ERR':
case 'ERR':
$severity = 4;
break;
// [CRIT] = Critical
// Numeric value: 5
// Rule of thumb: Something happened (probably someone did something) which is not an error,
// but some critical situation (e.g. hardware failure), and it affects you
case '?CRIT':
$severity_online = 5;
break;
case '!CRIT':
case 'CRIT':
$severity = 5;
break;
default:
throw new OIDplusException(_L('Invalid maskcode "%1" (Unknown severity "%2")',$maskcodes,$sev));
}
}
// OID(x) Save log entry into the logbook of: Object "x"
if (preg_match('@^OID\((.+)\)$@ismU', $maskcode, $m)) { $object_id = $m[1];
$objects[] = array($severity, $object_id); if ($object_id == '') throw new OIDplusException(_L('OID logger mask requires OID'));
}
// SUPOID(x) Save log entry into the logbook of: Parent of object "x"
else if (preg_match('@^SUPOID\((.+)\)$@ismU', $maskcode, $m)) { $object_id = $m[1];
if ($object_id == '') throw new OIDplusException(_L('SUPOID logger mask requires OID'));
$obj = OIDplusObject::parse($object_id);
if ($obj) {
if ($objParent = $obj->getParent()) {
$parent = $objParent->nodeId();
$objects[] = array($severity, $parent); } else {
//throw new OIDplusException(_L('%1 has no parent',$object_id));
}
} else {
throw new OIDplusException(_L('SUPOID logger mask: Invalid object %1',$object_id));
}
}
// OIDRA(x)? Save log entry into the logbook of: Logged in RA of object "x"
// Remove or replace "?" by "!" if the entity does not need to be logged in
else if (preg_match('@^OIDRA\((.+)\)([\?\!])$@ismU', $maskcode, $m)) { $object_id = $m[1];
$ra_need_login = $m[2] == '?';
if ($object_id == '') throw new OIDplusException(_L('OIDRA logger mask requires OID'));
$obj = OIDplusObject::parse($object_id);
if ($obj) {
if ($ra_need_login) {
foreach (OIDplus::authUtils()->loggedInRaList() as $ra) {
if ($obj->userHasWriteRights($ra)) $users[] = array($severity_online, $ra->raEmail()); }
} else {
// $users[] = array($severity, $obj->getRa()->raEmail());
foreach (OIDplusRA::getAllRAs() as $ra) {
if ($obj->userHasWriteRights($ra)) $users[] = array($severity, $ra->raEmail()); }
}
} else {
throw new OIDplusException(_L('OIDRA logger mask: Invalid object "%1"',$object_id));
}
}
// SUPOIDRA(x)? Save log entry into the logbook of: Logged in RA that owns the superior object of "x"
// Remove or replace "?" by "!" if the entity does not need to be logged in
else if (preg_match('@^SUPOIDRA\((.+)\)([\?\!])$@ismU', $maskcode, $m)) { $object_id = $m[1];
$ra_need_login = $m[2] == '?';
if ($object_id == '') throw new OIDplusException(_L('SUPOIDRA logger mask requires OID'));
$obj = OIDplusObject::parse($object_id);
if ($obj) {
if ($ra_need_login) {
foreach (OIDplus::authUtils()->loggedInRaList() as $ra) {
if ($obj->userHasParentalWriteRights($ra)) $users[] = array($severity_online, $ra->raEmail()); }
} else {
if ($objParent = $obj->getParent()) {
// $users[] = array($severity, $objParent->getRa()->raEmail());
foreach (OIDplusRA::getAllRAs() as $ra) {
if ($obj->userHasParentalWriteRights($ra)) $users[] = array($severity, $ra->raEmail()); }
} else {
//throw new OIDplusException(_L('%1 has no parent, therefore also no parent RA',$object_id));
}
}
} else {
throw new OIDplusException(_L('SUPOIDRA logger mask: Invalid object "%1"',$object_id));
}
}
// RA(x)? Save log entry into the logbook of: Logged in RA "x"
// Remove or replace "?" by "!" if the entity does not need to be logged in
else if (preg_match('@^RA\((.*)\)([\?\!])$@ismU', $maskcode, $m)) { $ra_email = $m[1];
$ra_need_login = $m[2] == '?';
if ($ra_need_login && OIDplus::authUtils()->isRaLoggedIn($ra_email)) {
$users[] = array($severity_online, $ra_email); } else if (!$ra_need_login) {
$users[] = array($severity, $ra_email); }
}
}
// A? Save log entry into the logbook of: A logged in admin
// Remove or replace "?" by "!" if the entity does not need to be logged in
else if (preg_match('@^A([\?\!])$@ismU', $maskcode, $m)) { $admin_need_login = $m[1] == '?';
if ($admin_need_login && OIDplus::authUtils()->isAdminLoggedIn()) {
$users[] = array($severity_online, 'admin'); } else if (!$admin_need_login) {
$users[] = array($severity, 'admin'); }
}
// Unexpected
else {
throw new OIDplusException(_L('Unexpected logger component "%1" in mask code "%2"',$maskcode,$maskcodes));
}
}
// Now write the log message
$result = false;
foreach ($loggerPlugins as $plugin) {
$reason = '';
if ($plugin->available($reason)) {
$result |= $plugin->log($event, $users, $objects); }
}
return $result;
}
}