| 1 | <?php
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| 2 | /*
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| 3 | * Project: NodeMap2.0
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| 4 | * File: LogHandler.class.php
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| 5 | * Purpose: Handling our log file containing log entries generated by the application
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| 6 | */
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| 7 |
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| 8 | /*
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| 9 | * Log levels:
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| 10 | * SYSLOG_EMERG System is unusable
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| 11 | * SYSLOG_ALERT Action must be taken immediately
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| 12 | * SYSLOG_CRIT Critical conditions
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| 13 | * SYSLOG_ERR Error conditions
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| 14 | * SYSLOG_WARNING Warning conditions
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| 15 | * SYSLOG_NOTICE Normal, but significant, condition
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| 16 | * SYSLOG_INFO Informational message
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| 17 | * SYSLOG_DEBUG Debug-level message
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| 18 | */
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| 19 |
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| 20 | define('SYSLOG_NONE', 0);
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| 21 | define('SYSLOG_EMERG', 1);
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| 22 | define('SYSLOG_ALERT', 2);
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| 23 | define('SYSLOG_CRIT', 3);
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| 24 | define('SYSLOG_ERR', 4);
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| 25 | define('SYSLOG_WARNING', 5);
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| 26 | define('SYSLOG_NOTICE', 6);
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| 27 | define('SYSLOG_INFO', 7);
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| 28 | define('SYSLOG_DEBUG', 8);
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| 29 |
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| 30 | /*
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| 31 | * Actions on log levels
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| 32 | */
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| 33 | define('LOG_LEVEL_ECHO', SYSLOG_DEBUG);
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| 34 | define('LOG_LEVEL_WRITE', SYSLOG_DEBUG);
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| 35 | define('LOG_LEVEL_MAIL', SYSLOG_DEBUG);
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| 36 |
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| 37 | class LogHandler {
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| 38 | private $logString; // For caching purposes
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| 39 |
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| 40 | /*
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| 41 | * Function: __construct (constructor)
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| 42 | * Parameters: -
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| 43 | * Function: Creating a LogHandler object
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| 44 | */
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| 45 | public function __construct() {
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| 46 | $logString = '';
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| 47 | }
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| 48 |
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| 49 | /*
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| 50 | * Function: logEntry
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| 51 | * Parameters: int $logno, string $logstr, string $logfile, int $logline
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| 52 | * Function: Handling with log entries, decides what to do with it
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| 53 | */
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| 54 | public function logEntry($logno, $logstr, $logfile, $logline) {
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| 55 | $errorString = 'SysLog ';
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| 56 |
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| 57 | switch ($logno) {
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| 58 | case SYSLOG_EMERG:
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| 59 | $errorString = 'Emergency';
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| 60 | break;
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| 61 | case SYSLOG_ALERT:
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| 62 | $errorString = 'Alert';
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| 63 | break;
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| 64 | case SYSLOG_CRIT:
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| 65 | $errorString = 'Critical';
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| 66 | break;
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| 67 | case SYSLOG_ERR:
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| 68 | $errorString = 'Error';
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| 69 | break;
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| 70 | case SYSLOG_WARNING:
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| 71 | $errorString = 'Warning';
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| 72 | break;
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| 73 | case SYSLOG_NOTICE:
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| 74 | $errorString = 'Notice';
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| 75 | break;
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| 76 | case SYSLOG_INFO:
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| 77 | $errorString = 'Information';
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| 78 | break;
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| 79 | case SYSLOG_DEBUG:
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| 80 | $errorString = 'Debug';
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| 81 | break;
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| 82 | default:
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| 83 | $errorString = 'SYSLOG_DEFAULT';
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| 84 | break;
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| 85 | }
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| 86 |
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| 87 | $errorString .= ' (' . $logno . ' | ' . date('Y/d/m H:i:s') . '): ' . $logstr . "\r\n\t" . 'In file "' . $logfile . '" on line "' . $logline . '"' . "\r\n";
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| 88 |
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| 89 | if ($logno <= LOG_LEVEL_ECHO) {
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| 90 | $this->logString .= $errorString;
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| 91 | }
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| 92 | if ((!defined('IGNORE_LOG_LEVEL_WRITE')) && ($logno <= LOG_LEVEL_WRITE)) {
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| 93 | $filename = 'logfile.txt';
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| 94 | if (is_writable($filename)) {
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| 95 |
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| 96 | //Check if the file can be opened
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| 97 | if (!$handle = fopen($filename, 'a')) {
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| 98 | define('IGNORE_LOG_LEVEL_WRITE', true);
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| 99 | trigger_log(SYSLOG_EMERG, 'Cannot open file "' . $filename . '"', __FILE__, __LINE__);
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| 100 | exit;
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| 101 | }
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| 102 |
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| 103 | // Write $errorString to file.
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| 104 | if (fwrite($handle, $errorString) === FALSE) {
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| 105 | define('LOG_LEVEL_WRITE', LOG_LEVEL_NONE);
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| 106 | trigger_log(SYSLOG_EMERG, 'Cannot write to "' . $filename . '"', __FILE__, __LINE__);
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| 107 | exit;
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| 108 | }
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| 109 |
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| 110 | fclose($handle);
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| 111 |
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| 112 | } else {
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| 113 | define('IGNORE_LOG_LEVEL_WRITE', true);
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| 114 | trigger_log(SYSLOG_EMERG, 'Cannot write to "' . $filename . '"', __FILE__, __LINE__);
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| 115 | }
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| 116 | }
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| 117 |
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| 118 | if ($logno <= LOG_LEVEL_MAIL) {
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| 119 | global $config;
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| 120 | mail($config['mail'], 'Nodemap error', $errorString);
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| 121 | }
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| 122 | }
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| 123 |
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| 124 | function __destruct() {
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| 125 | echo '<!-- ' . $this->logString . ' -->';
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| 126 | }
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| 127 | }
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| 128 |
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| 129 | $LOG_HANDLER = new LogHandler();
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| 130 |
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| 131 | /*
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| 132 | * Function: trigger_log
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| 133 | * Parameters: int $logno, string $logstr, string $logfile, int $logline
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| 134 | * Function: Handling with log entries, forwarding them to our $LOG_HANDLER object.
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| 135 | */
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| 136 | function trigger_log($logno, $logstr, $logfile, $logline) {
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| 137 | global $LOG_HANDLER;
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| 138 |
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| 139 | $LOG_HANDLER->logEntry($logno, $logstr, $logfile, $logline);
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| 140 | }
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| 141 | ?>
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