nextcloud /
server
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like OC_Helper often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use OC_Helper, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 51 | class OC_Helper { |
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| 52 | private static $templateManager; |
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| 53 | |||
| 54 | /** |
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| 55 | * Make a human file size |
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| 56 | * @param int $bytes file size in bytes |
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| 57 | * @return string a human readable file size |
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| 58 | * |
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| 59 | * Makes 2048 to 2 kB. |
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| 60 | */ |
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| 61 | public static function humanFileSize($bytes) { |
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| 62 | if ($bytes < 0) { |
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| 63 | return "?"; |
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| 64 | } |
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| 65 | if ($bytes < 1024) { |
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| 66 | return "$bytes B"; |
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| 67 | } |
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| 68 | $bytes = round($bytes / 1024, 0); |
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| 69 | if ($bytes < 1024) { |
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| 70 | return "$bytes KB"; |
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| 71 | } |
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| 72 | $bytes = round($bytes / 1024, 1); |
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| 73 | if ($bytes < 1024) { |
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| 74 | return "$bytes MB"; |
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| 75 | } |
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| 76 | $bytes = round($bytes / 1024, 1); |
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| 77 | if ($bytes < 1024) { |
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| 78 | return "$bytes GB"; |
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| 79 | } |
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| 80 | $bytes = round($bytes / 1024, 1); |
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| 81 | if ($bytes < 1024) { |
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| 82 | return "$bytes TB"; |
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| 83 | } |
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| 84 | |||
| 85 | $bytes = round($bytes / 1024, 1); |
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| 86 | return "$bytes PB"; |
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| 87 | } |
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| 88 | |||
| 89 | /** |
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| 90 | * Make a php file size |
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| 91 | * @param int $bytes file size in bytes |
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| 92 | * @return string a php parseable file size |
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| 93 | * |
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| 94 | * Makes 2048 to 2k and 2^41 to 2048G |
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| 95 | */ |
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| 96 | public static function phpFileSize($bytes) { |
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| 97 | if ($bytes < 0) { |
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| 98 | return "?"; |
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| 99 | } |
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| 100 | if ($bytes < 1024) { |
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| 101 | return $bytes . "B"; |
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| 102 | } |
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| 103 | $bytes = round($bytes / 1024, 1); |
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| 104 | if ($bytes < 1024) { |
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| 105 | return $bytes . "K"; |
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| 106 | } |
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| 107 | $bytes = round($bytes / 1024, 1); |
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| 108 | if ($bytes < 1024) { |
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| 109 | return $bytes . "M"; |
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| 110 | } |
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| 111 | $bytes = round($bytes / 1024, 1); |
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| 112 | return $bytes . "G"; |
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| 113 | } |
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| 114 | |||
| 115 | /** |
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| 116 | * Make a computer file size |
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| 117 | * @param string $str file size in human readable format |
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| 118 | * @return float|bool a file size in bytes |
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| 119 | * |
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| 120 | * Makes 2kB to 2048. |
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| 121 | * |
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| 122 | * Inspired by: http://www.php.net/manual/en/function.filesize.php#92418 |
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| 123 | */ |
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| 124 | public static function computerFileSize($str) { |
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| 125 | $str = strtolower($str); |
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| 126 | if (is_numeric($str)) { |
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| 127 | return (float)$str; |
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| 128 | } |
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| 129 | |||
| 130 | $bytes_array = array( |
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| 131 | 'b' => 1, |
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| 132 | 'k' => 1024, |
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| 133 | 'kb' => 1024, |
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| 134 | 'mb' => 1024 * 1024, |
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| 135 | 'm' => 1024 * 1024, |
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| 136 | 'gb' => 1024 * 1024 * 1024, |
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| 137 | 'g' => 1024 * 1024 * 1024, |
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| 138 | 'tb' => 1024 * 1024 * 1024 * 1024, |
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| 139 | 't' => 1024 * 1024 * 1024 * 1024, |
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| 140 | 'pb' => 1024 * 1024 * 1024 * 1024 * 1024, |
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| 141 | 'p' => 1024 * 1024 * 1024 * 1024 * 1024, |
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| 142 | ); |
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| 143 | |||
| 144 | $bytes = (float)$str; |
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| 145 | |||
| 146 | if (preg_match('#([kmgtp]?b?)$#si', $str, $matches) && !empty($bytes_array[$matches[1]])) { |
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| 147 | $bytes *= $bytes_array[$matches[1]]; |
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| 148 | } else { |
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| 149 | return false; |
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| 150 | } |
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| 151 | |||
| 152 | $bytes = round($bytes); |
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| 153 | |||
| 154 | return $bytes; |
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| 155 | } |
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| 156 | |||
| 157 | /** |
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| 158 | * Recursive copying of folders |
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| 159 | * @param string $src source folder |
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| 160 | * @param string $dest target folder |
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| 161 | * |
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| 162 | */ |
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| 163 | static function copyr($src, $dest) { |
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| 164 | if (is_dir($src)) { |
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| 165 | if (!is_dir($dest)) { |
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| 166 | mkdir($dest); |
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| 167 | } |
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| 168 | $files = scandir($src); |
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| 169 | foreach ($files as $file) { |
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| 170 | if ($file != "." && $file != "..") { |
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| 171 | self::copyr("$src/$file", "$dest/$file"); |
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| 172 | } |
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| 173 | } |
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| 174 | } elseif (file_exists($src) && !\OC\Files\Filesystem::isFileBlacklisted($src)) { |
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| 175 | copy($src, $dest); |
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| 176 | } |
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| 177 | } |
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| 178 | |||
| 179 | /** |
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| 180 | * Recursive deletion of folders |
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| 181 | * @param string $dir path to the folder |
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| 182 | * @param bool $deleteSelf if set to false only the content of the folder will be deleted |
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| 183 | * @return bool |
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| 184 | */ |
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| 185 | static function rmdirr($dir, $deleteSelf = true) { |
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| 186 | if (is_dir($dir)) { |
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| 187 | $files = new RecursiveIteratorIterator( |
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| 188 | new RecursiveDirectoryIterator($dir, RecursiveDirectoryIterator::SKIP_DOTS), |
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| 189 | RecursiveIteratorIterator::CHILD_FIRST |
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| 190 | ); |
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| 191 | |||
| 192 | foreach ($files as $fileInfo) { |
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| 193 | /** @var SplFileInfo $fileInfo */ |
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| 194 | if ($fileInfo->isLink()) { |
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| 195 | unlink($fileInfo->getPathname()); |
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| 196 | } else if ($fileInfo->isDir()) { |
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| 197 | rmdir($fileInfo->getRealPath()); |
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| 198 | } else { |
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| 199 | unlink($fileInfo->getRealPath()); |
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| 200 | } |
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| 201 | } |
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| 202 | if ($deleteSelf) { |
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| 203 | rmdir($dir); |
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| 204 | } |
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| 205 | } elseif (file_exists($dir)) { |
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| 206 | if ($deleteSelf) { |
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| 207 | unlink($dir); |
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| 208 | } |
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| 209 | } |
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| 210 | if (!$deleteSelf) { |
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| 211 | return true; |
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| 212 | } |
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| 213 | |||
| 214 | return !file_exists($dir); |
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| 215 | } |
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| 216 | |||
| 217 | /** |
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| 218 | * @return \OC\Files\Type\TemplateManager |
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| 219 | */ |
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| 220 | static public function getFileTemplateManager() { |
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| 221 | if (!self::$templateManager) { |
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| 222 | self::$templateManager = new \OC\Files\Type\TemplateManager(); |
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| 223 | } |
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| 224 | return self::$templateManager; |
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| 225 | } |
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| 226 | |||
| 227 | /** |
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| 228 | * detect if a given program is found in the search PATH |
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| 229 | * |
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| 230 | * @param string $name |
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| 231 | * @param bool $path |
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| 232 | * @internal param string $program name |
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| 233 | * @internal param string $optional search path, defaults to $PATH |
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| 234 | * @return bool true if executable program found in path |
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| 235 | */ |
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| 236 | public static function canExecute($name, $path = false) { |
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| 237 | // path defaults to PATH from environment if not set |
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| 238 | if ($path === false) { |
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| 239 | $path = getenv("PATH"); |
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| 240 | } |
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| 241 | // we look for an executable file of that name |
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| 242 | $exts = [""]; |
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| 243 | $check_fn = "is_executable"; |
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| 244 | // Default check will be done with $path directories : |
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| 245 | $dirs = explode(PATH_SEPARATOR, $path); |
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| 246 | // WARNING : We have to check if open_basedir is enabled : |
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| 247 | $obd = OC::$server->getIniWrapper()->getString('open_basedir'); |
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| 248 | if ($obd != "none") { |
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| 249 | $obd_values = explode(PATH_SEPARATOR, $obd); |
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| 250 | if (count($obd_values) > 0 and $obd_values[0]) { |
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| 251 | // open_basedir is in effect ! |
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| 252 | // We need to check if the program is in one of these dirs : |
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| 253 | $dirs = $obd_values; |
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| 254 | } |
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| 255 | } |
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| 256 | foreach ($dirs as $dir) { |
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| 257 | foreach ($exts as $ext) { |
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| 258 | if ($check_fn("$dir/$name" . $ext)) |
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| 259 | return true; |
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| 260 | } |
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| 261 | } |
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| 262 | return false; |
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| 263 | } |
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| 264 | |||
| 265 | /** |
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| 266 | * copy the contents of one stream to another |
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| 267 | * |
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| 268 | * @param resource $source |
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| 269 | * @param resource $target |
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| 270 | * @return array the number of bytes copied and result |
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| 271 | */ |
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| 272 | public static function streamCopy($source, $target) { |
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| 273 | if (!$source or !$target) { |
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| 274 | return array(0, false); |
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| 275 | } |
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| 276 | $bufSize = 8192; |
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| 277 | $result = true; |
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| 278 | $count = 0; |
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| 279 | while (!feof($source)) { |
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| 280 | $buf = fread($source, $bufSize); |
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| 281 | $bytesWritten = fwrite($target, $buf); |
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| 282 | if ($bytesWritten !== false) { |
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| 283 | $count += $bytesWritten; |
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| 284 | } |
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| 285 | // note: strlen is expensive so only use it when necessary, |
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| 286 | // on the last block |
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| 287 | if ($bytesWritten === false |
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| 288 | || ($bytesWritten < $bufSize && $bytesWritten < strlen($buf)) |
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| 289 | ) { |
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| 290 | // write error, could be disk full ? |
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| 291 | $result = false; |
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| 292 | break; |
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| 293 | } |
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| 294 | } |
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| 295 | return array($count, $result); |
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| 296 | } |
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| 297 | |||
| 298 | /** |
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| 299 | * Adds a suffix to the name in case the file exists |
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| 300 | * |
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| 301 | * @param string $path |
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| 302 | * @param string $filename |
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| 303 | * @return string |
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| 304 | */ |
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| 305 | public static function buildNotExistingFileName($path, $filename) { |
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| 306 | $view = \OC\Files\Filesystem::getView(); |
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| 307 | return self::buildNotExistingFileNameForView($path, $filename, $view); |
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| 308 | } |
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| 309 | |||
| 310 | /** |
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| 311 | * Adds a suffix to the name in case the file exists |
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| 312 | * |
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| 313 | * @param string $path |
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| 314 | * @param string $filename |
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| 315 | * @return string |
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| 316 | */ |
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| 317 | public static function buildNotExistingFileNameForView($path, $filename, \OC\Files\View $view) { |
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| 318 | if ($path === '/') { |
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| 319 | $path = ''; |
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| 320 | } |
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| 321 | if ($pos = strrpos($filename, '.')) { |
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| 322 | $name = substr($filename, 0, $pos); |
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| 323 | $ext = substr($filename, $pos); |
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| 324 | } else { |
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| 325 | $name = $filename; |
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| 326 | $ext = ''; |
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| 327 | } |
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| 328 | |||
| 329 | $newpath = $path . '/' . $filename; |
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| 330 | if ($view->file_exists($newpath)) { |
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| 331 | if (preg_match_all('/\((\d+)\)/', $name, $matches, PREG_OFFSET_CAPTURE)) { |
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| 332 | //Replace the last "(number)" with "(number+1)" |
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| 333 | $last_match = count($matches[0]) - 1; |
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| 334 | $counter = $matches[1][$last_match][0] + 1; |
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| 335 | $offset = $matches[0][$last_match][1]; |
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| 336 | $match_length = strlen($matches[0][$last_match][0]); |
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| 337 | } else { |
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| 338 | $counter = 2; |
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| 339 | $match_length = 0; |
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| 340 | $offset = false; |
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| 341 | } |
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| 342 | do { |
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| 343 | if ($offset) { |
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| 344 | //Replace the last "(number)" with "(number+1)" |
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| 345 | $newname = substr_replace($name, '(' . $counter . ')', $offset, $match_length); |
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| 346 | } else { |
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| 347 | $newname = $name . ' (' . $counter . ')'; |
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| 348 | } |
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| 349 | $newpath = $path . '/' . $newname . $ext; |
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| 350 | $counter++; |
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| 351 | } while ($view->file_exists($newpath)); |
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| 352 | } |
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| 353 | |||
| 354 | return $newpath; |
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| 355 | } |
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| 356 | |||
| 357 | /** |
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| 358 | * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is. |
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| 359 | * |
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| 360 | * @param array $input The array to work on |
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| 361 | * @param int $case Either MB_CASE_UPPER or MB_CASE_LOWER (default) |
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| 362 | * @param string $encoding The encoding parameter is the character encoding. Defaults to UTF-8 |
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| 363 | * @return array |
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| 364 | * |
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| 365 | * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is. |
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| 366 | * based on http://www.php.net/manual/en/function.array-change-key-case.php#107715 |
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| 367 | * |
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| 368 | */ |
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| 369 | public static function mb_array_change_key_case($input, $case = MB_CASE_LOWER, $encoding = 'UTF-8') { |
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| 370 | $case = ($case != MB_CASE_UPPER) ? MB_CASE_LOWER : MB_CASE_UPPER; |
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| 371 | $ret = array(); |
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| 372 | foreach ($input as $k => $v) { |
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| 373 | $ret[mb_convert_case($k, $case, $encoding)] = $v; |
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| 374 | } |
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| 375 | return $ret; |
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| 376 | } |
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| 377 | |||
| 378 | /** |
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| 379 | * performs a search in a nested array |
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| 380 | * @param array $haystack the array to be searched |
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| 381 | * @param string $needle the search string |
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| 382 | * @param mixed $index optional, only search this key name |
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| 383 | * @return mixed the key of the matching field, otherwise false |
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| 384 | * |
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| 385 | * performs a search in a nested array |
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| 386 | * |
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| 387 | * taken from http://www.php.net/manual/en/function.array-search.php#97645 |
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| 388 | */ |
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| 389 | public static function recursiveArraySearch($haystack, $needle, $index = null) { |
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| 390 | $aIt = new RecursiveArrayIterator($haystack); |
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| 391 | $it = new RecursiveIteratorIterator($aIt); |
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| 392 | |||
| 393 | while ($it->valid()) { |
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| 394 | if (((isset($index) AND ($it->key() == $index)) OR !isset($index)) AND ($it->current() == $needle)) { |
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| 395 | return $aIt->key(); |
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| 396 | } |
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| 397 | |||
| 398 | $it->next(); |
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| 399 | } |
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| 400 | |||
| 401 | return false; |
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| 402 | } |
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| 403 | |||
| 404 | /** |
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| 405 | * calculates the maximum upload size respecting system settings, free space and user quota |
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| 406 | * |
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| 407 | * @param string $dir the current folder where the user currently operates |
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| 408 | * @param int $freeSpace the number of bytes free on the storage holding $dir, if not set this will be received from the storage directly |
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| 409 | * @return int number of bytes representing |
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| 410 | */ |
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| 411 | public static function maxUploadFilesize($dir, $freeSpace = null) { |
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| 412 | if (is_null($freeSpace) || $freeSpace < 0){ |
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| 413 | $freeSpace = self::freeSpace($dir); |
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| 414 | } |
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| 415 | return min($freeSpace, self::uploadLimit()); |
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| 416 | } |
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| 417 | |||
| 418 | /** |
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| 419 | * Calculate free space left within user quota |
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| 420 | * |
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| 421 | * @param string $dir the current folder where the user currently operates |
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| 422 | * @return int number of bytes representing |
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| 423 | */ |
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| 424 | public static function freeSpace($dir) { |
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| 425 | $freeSpace = \OC\Files\Filesystem::free_space($dir); |
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| 426 | if ($freeSpace < \OCP\Files\FileInfo::SPACE_UNLIMITED) { |
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| 427 | $freeSpace = max($freeSpace, 0); |
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| 428 | return $freeSpace; |
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| 429 | } else { |
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| 430 | return (INF > 0)? INF: PHP_INT_MAX; // work around https://bugs.php.net/bug.php?id=69188 |
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| 431 | } |
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| 432 | } |
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| 433 | |||
| 434 | /** |
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| 435 | * Calculate PHP upload limit |
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| 436 | * |
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| 437 | * @return int PHP upload file size limit |
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| 438 | */ |
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| 439 | public static function uploadLimit() { |
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| 449 | } |
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| 450 | } |
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| 451 | |||
| 452 | /** |
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| 453 | * Checks if a function is available |
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| 454 | * |
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| 455 | * @param string $function_name |
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| 456 | * @return bool |
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| 457 | */ |
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| 458 | public static function is_function_enabled($function_name) { |
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| 459 | if (!function_exists($function_name)) { |
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| 460 | return false; |
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| 461 | } |
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| 462 | $ini = \OC::$server->getIniWrapper(); |
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| 463 | $disabled = explode(',', $ini->get('disable_functions') ?: ''); |
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| 464 | $disabled = array_map('trim', $disabled); |
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| 465 | if (in_array($function_name, $disabled)) { |
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| 466 | return false; |
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| 467 | } |
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| 468 | $disabled = explode(',', $ini->get('suhosin.executor.func.blacklist') ?: ''); |
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| 469 | $disabled = array_map('trim', $disabled); |
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| 470 | if (in_array($function_name, $disabled)) { |
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| 471 | return false; |
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| 472 | } |
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| 473 | return true; |
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| 474 | } |
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| 475 | |||
| 476 | /** |
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| 477 | * Try to find a program |
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| 478 | * |
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| 479 | * @param string $program |
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| 480 | * @return null|string |
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| 481 | */ |
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| 482 | public static function findBinaryPath($program) { |
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| 496 | } |
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| 497 | |||
| 498 | /** |
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| 499 | * Calculate the disc space for the given path |
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| 500 | * |
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| 501 | * @param string $path |
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| 502 | * @param \OCP\Files\FileInfo $rootInfo (optional) |
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| 503 | * @return array |
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| 504 | * @throws \OCP\Files\NotFoundException |
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| 505 | */ |
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| 506 | public static function getStorageInfo($path, $rootInfo = null) { |
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| 507 | // return storage info without adding mount points |
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| 508 | $includeExtStorage = \OC::$server->getSystemConfig()->getValue('quota_include_external_storage', false); |
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| 509 | |||
| 510 | if (!$rootInfo) { |
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| 511 | $rootInfo = \OC\Files\Filesystem::getFileInfo($path, $includeExtStorage ? 'ext' : false); |
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| 512 | } |
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| 513 | if (!$rootInfo instanceof \OCP\Files\FileInfo) { |
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| 514 | throw new \OCP\Files\NotFoundException(); |
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| 515 | } |
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| 516 | $used = $rootInfo->getSize(); |
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| 517 | if ($used < 0) { |
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| 518 | $used = 0; |
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| 519 | } |
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| 520 | $quota = \OCP\Files\FileInfo::SPACE_UNLIMITED; |
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| 521 | $storage = $rootInfo->getStorage(); |
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| 522 | $sourceStorage = $storage; |
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| 523 | if ($storage->instanceOfStorage('\OCA\Files_Sharing\SharedStorage')) { |
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| 524 | $includeExtStorage = false; |
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| 525 | $sourceStorage = $storage->getSourceStorage(); |
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| 526 | } |
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| 527 | if ($includeExtStorage) { |
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| 528 | if ($storage->instanceOfStorage('\OC\Files\Storage\Home') |
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| 529 | || $storage->instanceOfStorage('\OC\Files\ObjectStore\HomeObjectStoreStorage') |
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| 530 | ) { |
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| 531 | /** @var \OC\Files\Storage\Home $storage */ |
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| 532 | $userInstance = $storage->getUser(); |
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| 533 | $user = ($userInstance === null) ? null : $userInstance->getUID(); |
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| 534 | } else { |
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| 535 | $user = \OC::$server->getUserSession()->getUser()->getUID(); |
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| 536 | } |
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| 537 | if ($user) { |
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| 538 | $quota = OC_Util::getUserQuota($user); |
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| 539 | } else { |
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| 540 | $quota = \OCP\Files\FileInfo::SPACE_UNLIMITED; |
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| 541 | } |
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| 542 | if ($quota !== \OCP\Files\FileInfo::SPACE_UNLIMITED) { |
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| 543 | // always get free space / total space from root + mount points |
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| 544 | return self::getGlobalStorageInfo(); |
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| 545 | } |
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| 546 | } |
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| 547 | |||
| 548 | // TODO: need a better way to get total space from storage |
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| 549 | if ($sourceStorage->instanceOfStorage('\OC\Files\Storage\Wrapper\Quota')) { |
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| 550 | /** @var \OC\Files\Storage\Wrapper\Quota $storage */ |
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| 551 | $quota = $sourceStorage->getQuota(); |
||
| 552 | } |
||
| 553 | $free = $sourceStorage->free_space($rootInfo->getInternalPath()); |
||
| 554 | if ($free >= 0) { |
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| 555 | $total = $free + $used; |
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| 556 | } else { |
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| 557 | $total = $free; //either unknown or unlimited |
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| 558 | } |
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| 559 | if ($total > 0) { |
||
| 560 | if ($quota > 0 && $total > $quota) { |
||
| 561 | $total = $quota; |
||
| 562 | } |
||
| 563 | // prevent division by zero or error codes (negative values) |
||
| 564 | $relative = round(($used / $total) * 10000) / 100; |
||
| 565 | } else { |
||
| 566 | $relative = 0; |
||
| 567 | } |
||
| 568 | |||
| 569 | $ownerId = $storage->getOwner($path); |
||
| 570 | $ownerDisplayName = ''; |
||
| 571 | $owner = \OC::$server->getUserManager()->get($ownerId); |
||
| 572 | if($owner) { |
||
| 573 | $ownerDisplayName = $owner->getDisplayName(); |
||
| 574 | } |
||
| 575 | |||
| 576 | return [ |
||
| 577 | 'free' => $free, |
||
| 578 | 'used' => $used, |
||
| 579 | 'quota' => $quota, |
||
| 580 | 'total' => $total, |
||
| 581 | 'relative' => $relative, |
||
| 582 | 'owner' => $ownerId, |
||
| 583 | 'ownerDisplayName' => $ownerDisplayName, |
||
| 584 | ]; |
||
| 585 | } |
||
| 586 | |||
| 587 | /** |
||
| 588 | * Get storage info including all mount points and quota |
||
| 589 | * |
||
| 590 | * @return array |
||
| 591 | */ |
||
| 592 | private static function getGlobalStorageInfo() { |
||
| 615 | |||
| 616 | } |
||
| 617 | |||
| 618 | /** |
||
| 619 | * Returns whether the config file is set manually to read-only |
||
| 620 | * @return bool |
||
| 621 | */ |
||
| 622 | public static function isReadOnlyConfigEnabled() { |
||
| 623 | return \OC::$server->getConfig()->getSystemValue('config_is_read_only', false); |
||
| 624 | } |
||
| 625 | } |
||
| 626 |
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Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.