1 | <?php |
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2 | // +-----------------------------------------------------------------------+ |
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3 | // | Piwigo - a PHP based photo gallery | |
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4 | // +-----------------------------------------------------------------------+ |
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5 | // | Copyright(C) 2008-2015 Piwigo Team http://piwigo.org | |
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6 | // | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net | |
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7 | // | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick | |
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8 | // +-----------------------------------------------------------------------+ |
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9 | // | This program is free software; you can redistribute it and/or modify | |
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10 | // | it under the terms of the GNU General Public License as published by | |
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11 | // | the Free Software Foundation | |
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12 | // | | |
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13 | // | This program is distributed in the hope that it will be useful, but | |
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14 | // | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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15 | // | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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16 | // | General Public License for more details. | |
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17 | // | | |
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18 | // | You should have received a copy of the GNU General Public License | |
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19 | // | along with this program; if not, write to the Free Software | |
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20 | // | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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21 | // | USA. | |
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22 | // +-----------------------------------------------------------------------+ |
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23 | |
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24 | /** |
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25 | * Modified version of KLogger 0.2.0 |
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26 | * |
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27 | * @author Kenny Katzgrau <katzgrau@gmail.com> |
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28 | * |
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29 | * @package logger |
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30 | */ |
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31 | |
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32 | class Logger |
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33 | { |
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34 | /** |
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35 | * Error severity, from low to high. From BSD syslog RFC, section 4.1.1 |
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36 | * @link http://www.faqs.org/rfcs/rfc3164.html |
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37 | */ |
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38 | const EMERGENCY = 0; // Emergency: system is unusable |
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39 | const ALERT = 1; // Alert: action must be taken immediately |
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40 | const CRITICAL = 2; // Critical: critical conditions |
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41 | const ERROR = 3; // Error: error conditions |
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42 | const WARNING = 4; // Warning: warning conditions |
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43 | const NOTICE = 5; // Notice: normal but significant condition |
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44 | const INFO = 6; // Informational: informational messages |
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45 | const DEBUG = 7; // Debug: debug messages |
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46 | |
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47 | /** |
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48 | * Custom "disable" level. |
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49 | */ |
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50 | const OFF = -1; // Log nothing at all |
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51 | |
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52 | /** |
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53 | * Internal status codes. |
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54 | */ |
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55 | const STATUS_LOG_OPEN = 1; |
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56 | const STATUS_OPEN_FAILED = 2; |
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57 | const STATUS_LOG_CLOSED = 3; |
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58 | |
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59 | /** |
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60 | * Disable archive purge. |
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61 | */ |
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62 | const ARCHIVE_NO_PURGE = -1; |
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63 | |
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64 | /** |
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65 | * Standard messages produced by the class. |
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66 | * @var array |
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67 | */ |
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68 | private static $_messages = array( |
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69 | 'writefail' => 'The file could not be written to. Check that appropriate permissions have been set.', |
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70 | 'opensuccess' => 'The log file was opened successfully.', |
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71 | 'openfail' => 'The file could not be opened. Check permissions.', |
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72 | ); |
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73 | |
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74 | /** |
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75 | * Instance options. |
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76 | * @var array |
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77 | */ |
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78 | private $options = array( |
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79 | 'directory' => null, // Log files directory |
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80 | 'filename' => null, // Path to the log file |
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81 | 'globPattern' => 'log_*.txt', // Pattern to select all log files with glob() |
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82 | 'severity' => self::DEBUG, // Current minimum logging threshold |
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83 | 'dateFormat' => 'Y-m-d G:i:s', // Date format |
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84 | 'archiveDays' => self::ARCHIVE_NO_PURGE, // Number of files to keep |
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85 | ); |
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86 | |
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87 | /** |
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88 | * Current status of the logger. |
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89 | * @var integer |
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90 | */ |
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91 | private $_logStatus = self::STATUS_LOG_CLOSED; |
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92 | /** |
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93 | * File handle for this instance's log file. |
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94 | * @var resource |
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95 | */ |
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96 | private $_fileHandle = null; |
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97 | |
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98 | /** |
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99 | * Class constructor. |
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100 | * |
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101 | * @param array $options |
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102 | * @return void |
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103 | */ |
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104 | public function __construct($options) |
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105 | { |
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106 | $this->options = array_merge($this->options, $options); |
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107 | |
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108 | if (is_string($this->options['severity'])) { |
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109 | $this->options['severity'] = self::codeToLevel($this->options['severity']); |
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110 | } |
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111 | |
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112 | if ($this->options['severity'] === self::OFF) { |
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113 | return; |
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114 | } |
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115 | |
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116 | $this->options['directory'] = rtrim($this->options['directory'], '\\/') . DIRECTORY_SEPARATOR; |
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117 | |
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118 | if ($this->options['filename'] == null) { |
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119 | $this->options['filename'] = 'log_' . date('Y-m-d') . '.txt'; |
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120 | } |
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121 | |
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122 | $this->options['filePath'] = $this->options['directory'] . $this->options['filename']; |
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123 | |
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124 | if (!file_exists($this->options['directory'])) { |
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125 | mkgetdir($this->options['directory'], MKGETDIR_DEFAULT|MKGETDIR_PROTECT_HTACCESS); |
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126 | } |
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127 | |
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128 | if (file_exists($this->options['filePath']) && !is_writable($this->options['filePath'])) { |
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129 | $this->_logStatus = self::STATUS_OPEN_FAILED; |
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130 | throw new RuntimeException(self::$_messages['writefail']); |
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131 | return; |
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132 | } |
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133 | |
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134 | if (($this->_fileHandle = fopen($this->options['filePath'], 'a'))) { |
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135 | $this->_logStatus = self::STATUS_LOG_OPEN; |
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136 | } |
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137 | else { |
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138 | $this->_logStatus = self::STATUS_OPEN_FAILED; |
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139 | throw new RuntimeException(self::$_messages['openfail']); |
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140 | } |
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141 | |
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142 | if ($this->options['archiveDays'] != self::ARCHIVE_NO_PURGE && rand() % 97 == 0) { |
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143 | $this->purge(); |
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144 | } |
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145 | } |
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146 | |
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147 | /** |
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148 | * Class destructor. |
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149 | */ |
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150 | public function __destruct() |
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151 | { |
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152 | if ($this->_fileHandle) { |
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153 | fclose($this->_fileHandle); |
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154 | } |
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155 | } |
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156 | |
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157 | /** |
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158 | * Returns logger status. |
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159 | * |
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160 | * @return int |
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161 | */ |
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162 | public function status() |
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163 | { |
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164 | return $this->_logStatus; |
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165 | } |
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166 | |
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167 | /** |
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168 | * Returns logger severity threshold. |
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169 | * |
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170 | * @return int |
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171 | */ |
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172 | public function severity() |
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173 | { |
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174 | return $this->options['severity']; |
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175 | } |
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176 | |
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177 | /** |
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178 | * Writes a $line to the log with a severity level of DEBUG. |
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179 | * |
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180 | * @param string $line |
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181 | * @param string $cat |
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182 | * @param array $args |
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183 | */ |
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184 | public function debug($line, $cat = null, $args = array()) |
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185 | { |
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186 | $this->log(self::DEBUG, $line, $cat, $args); |
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187 | } |
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188 | |
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189 | /** |
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190 | * Writes a $line to the log with a severity level of INFO. |
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191 | * |
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192 | * @param string $line |
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193 | * @param string $cat |
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194 | * @param array $args |
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195 | */ |
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196 | public function info($line, $cat = null, $args = array()) |
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197 | { |
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198 | $this->log(self::INFO, $line, $cat, $args); |
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199 | } |
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200 | |
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201 | /** |
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202 | * Writes a $line to the log with a severity level of NOTICE. |
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203 | * |
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204 | * @param string $line |
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205 | * @param string $cat |
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206 | * @param array $args |
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207 | */ |
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208 | public function notice($line, $cat = null, $args = array()) |
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209 | { |
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210 | $this->log(self::NOTICE, $line, $cat, $args); |
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211 | } |
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212 | |
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213 | /** |
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214 | * Writes a $line to the log with a severity level of WARNING. |
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215 | * |
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216 | * @param string $line |
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217 | * @param string $cat |
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218 | * @param array $args |
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219 | */ |
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220 | public function warn($line, $cat = null, $args = array()) |
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221 | { |
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222 | $this->log(self::WARNING, $line, $cat, $args); |
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223 | } |
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224 | |
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225 | /** |
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226 | * Writes a $line to the log with a severity level of ERROR. |
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227 | * |
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228 | * @param string $line |
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229 | * @param string $cat |
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230 | * @param array $args |
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231 | */ |
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232 | public function error($line, $cat = null, $args = array()) |
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233 | { |
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234 | $this->log(self::ERROR, $line, $cat, $args); |
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235 | } |
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236 | |
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237 | /** |
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238 | * Writes a $line to the log with a severity level of ALERT. |
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239 | * |
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240 | * @param string $line |
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241 | * @param string $cat |
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242 | * @param array $args |
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243 | */ |
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244 | public function alert($line, $cat = null, $args = array()) |
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245 | { |
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246 | $this->log(self::ALERT, $line, $cat, $args); |
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247 | } |
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248 | |
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249 | /** |
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250 | * Writes a $line to the log with a severity level of CRITICAL. |
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251 | * |
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252 | * @param string $line |
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253 | * @param string $cat |
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254 | * @param array $args |
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255 | */ |
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256 | public function critical($line, $cat = null, $args = array()) |
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257 | { |
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258 | $this->log(self::CRITICAL, $line, $cat, $args); |
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259 | } |
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260 | |
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261 | /** |
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262 | * Writes a $line to the log with a severity level of EMERGENCY. |
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263 | * |
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264 | * @param string $line |
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265 | * @param string $cat |
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266 | * @param array $args |
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267 | */ |
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268 | public function emergency($line, $cat = null, $args = array()) |
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269 | { |
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270 | $this->log(self::EMERGENCY, $line, $cat, $args); |
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271 | } |
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272 | |
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273 | /** |
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274 | * Writes a $line to the log with the given severity. |
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275 | * |
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276 | * @param integer $severity |
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277 | * @param string $line |
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278 | * @param string $cat |
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279 | * @param array $args |
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280 | */ |
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281 | public function log($severity, $message, $cat = null, $args = array()) |
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282 | { |
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283 | if ($this->severity() >= $severity) { |
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284 | if (is_array($cat)) { |
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285 | $args = $cat; |
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286 | $cat = null; |
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287 | } |
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288 | $line = $this->formatMessage($severity, $message, $cat, $args); |
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289 | $this->write($line); |
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290 | } |
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291 | } |
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292 | |
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293 | /** |
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294 | * Directly writes a line to the log without adding level and time. |
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295 | * |
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296 | * @param string $line |
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297 | */ |
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298 | public function write($line) |
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299 | { |
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300 | if ($this->_logStatus == self::STATUS_LOG_OPEN) { |
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301 | if (fwrite($this->_fileHandle, $line) === false) { |
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302 | throw new RuntimeException(self::$_messages['writefail']); |
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303 | } |
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304 | } |
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305 | } |
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306 | |
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307 | /** |
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308 | * Purges files matching 'globPattern' older than 'archiveDays'. |
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309 | */ |
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310 | public function purge() { |
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311 | $files = glob($this->options['directory'] . $this->options['globPattern']); |
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312 | $limit = time() - $this->options['archiveDays'] * 86400; |
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313 | |
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314 | foreach ($files as $file) { |
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315 | if (@filemtime($file) < $limit) { |
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316 | @unlink($file); |
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317 | } |
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318 | } |
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319 | } |
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320 | |
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321 | /** |
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322 | * Formats the message for logging. |
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323 | * |
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324 | * @param string $level |
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325 | * @param string $message |
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326 | * @param array $context |
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327 | * @return string |
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328 | */ |
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329 | private function formatMessage($level, $message, $cat, $context) |
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330 | { |
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331 | if (!empty($context)) { |
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332 | $message .= "\n" . $this->indent($this->contextToString($context)); |
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333 | } |
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334 | $line = "[" . $this->getTimestamp() . "]\t[" . self::levelToCode($level) . "]\t"; |
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335 | if ($cat != null) { |
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336 | $line .= "[" . $cat . "]\t"; |
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337 | } |
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338 | return $line . $message . "\n"; |
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339 | } |
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340 | |
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341 | /** |
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342 | * Gets the formatted Date/Time for the log entry. |
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343 | * |
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344 | * PHP DateTime is dumb, and you have to resort to trickery to get microseconds |
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345 | * to work correctly, so here it is. |
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346 | * |
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347 | * @return string |
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348 | */ |
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349 | private function getTimestamp() |
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350 | { |
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351 | $originalTime = microtime(true); |
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352 | $micro = sprintf("%06d", ($originalTime - floor($originalTime)) * 1000000); |
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353 | $date = new DateTime(date('Y-m-d H:i:s.'.$micro, $originalTime)); |
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354 | return $date->format($this->options['dateFormat']); |
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355 | } |
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356 | |
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357 | /** |
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358 | * Takes the given context and converts it to a string. |
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359 | * |
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360 | * @param array $context |
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361 | * @return string |
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362 | */ |
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363 | private function contextToString($context) |
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364 | { |
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365 | $export = ''; |
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366 | foreach ($context as $key => $value) { |
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367 | $export .= "{$key}: "; |
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368 | $export .= preg_replace(array( |
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369 | '/=>\s+([a-zA-Z])/im', |
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370 | '/array\(\s+\)/im', |
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371 | '/^ |\G /m' |
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372 | ), array( |
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373 | '=> $1', |
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374 | 'array()', |
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375 | ' ' |
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376 | ), str_replace('array (', 'array(', var_export($value, true))); |
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377 | $export .= PHP_EOL; |
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378 | } |
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379 | return str_replace(array('\\\\', '\\\''), array('\\', '\''), rtrim($export)); |
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380 | } |
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381 | |
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382 | /** |
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383 | * Indents the given string with the given indent. |
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384 | * |
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385 | * @param string $string The string to indent |
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386 | * @param string $indent What to use as the indent. |
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387 | * @return string |
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388 | */ |
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389 | private function indent($string, $indent = ' ') |
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390 | { |
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391 | return $indent.str_replace("\n", "\n".$indent, $string); |
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392 | } |
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393 | |
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394 | /** |
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395 | * Converts level constants to string name. |
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396 | * |
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397 | * @param int $level |
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398 | * @return string |
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399 | */ |
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400 | static function levelToCode($level) |
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401 | { |
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402 | switch ($level) { |
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403 | case self::EMERGENCY: |
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404 | return 'EMERGENCY'; |
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405 | case self::ALERT: |
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406 | return 'ALERT'; |
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407 | case self::CRITICAL: |
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408 | return 'CRITICAL'; |
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409 | case self::NOTICE: |
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410 | return 'NOTICE'; |
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411 | case self::INFO: |
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412 | return 'INFO'; |
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413 | case self::WARNING: |
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414 | return 'WARNING'; |
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415 | case self::DEBUG: |
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416 | return 'DEBUG'; |
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417 | case self::ERROR: |
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418 | return 'ERROR'; |
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419 | default: |
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420 | throw new RuntimeException('Unknown severity level ' . $level); |
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421 | } |
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422 | } |
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423 | |
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424 | /** |
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425 | * Converts level names to constant. |
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426 | * |
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427 | * @param string $code |
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428 | * @return int |
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429 | */ |
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430 | static function codeToLevel($code) |
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431 | { |
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432 | switch (strtoupper($code)) { |
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433 | case 'EMERGENCY': |
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434 | return self::EMERGENCY; |
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435 | case 'ALERT': |
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436 | return self::ALERT; |
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437 | case 'CRITICAL': |
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438 | return self::CRITICAL; |
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439 | case 'NOTICE': |
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440 | return self::NOTICE; |
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441 | case 'INFO': |
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442 | return self::INFO; |
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443 | case 'WARNING': |
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444 | return self::WARNING; |
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445 | case 'DEBUG': |
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446 | return self::DEBUG; |
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447 | case 'ERROR': |
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448 | return self::ERROR; |
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449 | default: |
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450 | throw new RuntimeException('Unknown severity code ' . $code); |
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451 | } |
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452 | } |
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453 | } |
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