CRM/Utils/File.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | Copyright CiviCRM LLC. All rights reserved.                        |
   5  |                                                                    |
   6  | This work is published under the GNU AGPLv3 license with some      |
   7  | permitted exceptions and without any warranty. For full license    |
   8  | and copyright information, see https://civicrm.org/licensing       |
   9  +--------------------------------------------------------------------+
  10  */
  11
  12 /**
  13  *
  14  * @package CRM
  15  * @copyright CiviCRM LLC https://civicrm.org/licensing
  16  */
  17
  18 /**
  19  * class to provide simple static functions for file objects
  20  */
  21 class CRM_Utils_File {
  22
  23   /**
  24    * Given a file name, determine if the file contents make it an ascii file
  25    *
  26    * @param string $name
  27    *   Name of file.
  28    *
  29    * @return bool
  30    *   true if file is ascii
  31    */
  32   public static function isAscii($name) {
  33     $fd = fopen($name, "r");
  34     if (!$fd) {
  35       return FALSE;
  36     }
  37
  38     $ascii = TRUE;
  39     while (!feof($fd)) {
  40       $line = fgets($fd, 8192);
  41       if (!CRM_Utils_String::isAscii($line)) {
  42         $ascii = FALSE;
  43         break;
  44       }
  45     }
  46
  47     fclose($fd);
  48     return $ascii;
  49   }
  50
  51   /**
  52    * Given a file name, determine if the file contents make it an html file
  53    *
  54    * @param string $name
  55    *   Name of file.
  56    *
  57    * @return bool
  58    *   true if file is html
  59    */
  60   public static function isHtml($name) {
  61     $fd = fopen($name, "r");
  62     if (!$fd) {
  63       return FALSE;
  64     }
  65
  66     $html = FALSE;
  67     $lineCount = 0;
  68     while (!feof($fd) & $lineCount <= 5) {
  69       $lineCount++;
  70       $line = fgets($fd, 8192);
  71       if (!CRM_Utils_String::isHtml($line)) {
  72         $html = TRUE;
  73         break;
  74       }
  75     }
  76
  77     fclose($fd);
  78     return $html;
  79   }
  80
  81   /**
  82    * Create a directory given a path name, creates parent directories
  83    * if needed
  84    *
  85    * @param string $path
  86    *   The path name.
  87    * @param bool $abort
  88    *   Should we abort or just return an invalid code.
  89    * @return bool|NULL
  90    *   NULL: Folder already exists or was not specified.
  91    *   TRUE: Creation succeeded.
  92    *   FALSE: Creation failed.
  93    */
  94   public static function createDir($path, $abort = TRUE) {
  95     if (is_dir($path) || empty($path)) {
  96       return NULL;
  97     }
  98
  99     CRM_Utils_File::createDir(dirname($path), $abort);
 100     if (@mkdir($path, 0777) == FALSE) {
 101       if ($abort) {
 102         $docLink = CRM_Utils_System::docURL2('Moving an Existing Installation to a New Server or Location', NULL, NULL, NULL, NULL, "wiki");
 103         echo "Error: Could not create directory: $path.<p>If you have moved an existing CiviCRM installation from one location or server to another there are several steps you will need to follow. They are detailed on this CiviCRM wiki page - {$docLink}. A fix for the specific problem that caused this error message to be displayed is to set the value of the config_backend column in the civicrm_domain table to NULL. However we strongly recommend that you review and follow all the steps in that document.</p>";
 104
 105         CRM_Utils_System::civiExit();
 106       }
 107       else {
 108         return FALSE;
 109       }
 110     }
 111     return TRUE;
 112   }
 113
 114   /**
 115    * Delete a directory given a path name, delete children directories
 116    * and files if needed
 117    *
 118    * @param string $target
 119    *   The path name.
 120    * @param bool $rmdir
 121    * @param bool $verbose
 122    *
 123    * @throws Exception
 124    */
 125   public static function cleanDir($target, $rmdir = TRUE, $verbose = TRUE) {
 126     static $exceptions = ['.', '..'];
 127     if ($target == '' || $target == '/' || !$target) {
 128       throw new Exception("Overly broad deletion");
 129     }
 130
 131     if ($dh = @opendir($target)) {
 132       while (FALSE !== ($sibling = readdir($dh))) {
 133         if (!in_array($sibling, $exceptions)) {
 134           $object = $target . DIRECTORY_SEPARATOR . $sibling;
 135
 136           if (is_dir($object)) {
 137             CRM_Utils_File::cleanDir($object, $rmdir, $verbose);
 138           }
 139           elseif (is_file($object)) {
 140             if (!unlink($object)) {
 141               CRM_Core_Session::setStatus(ts('Unable to remove file %1', [1 => $object]), ts('Warning'), 'error');
 142             }
 143           }
 144         }
 145       }
 146       closedir($dh);
 147
 148       if ($rmdir) {
 149         if (rmdir($target)) {
 150           if ($verbose) {
 151             CRM_Core_Session::setStatus(ts('Removed directory %1', [1 => $target]), '', 'success');
 152           }
 153           return TRUE;
 154         }
 155         else {
 156           CRM_Core_Session::setStatus(ts('Unable to remove directory %1', [1 => $target]), ts('Warning'), 'error');
 157         }
 158       }
 159     }
 160   }
 161
 162   /**
 163    * Concatenate several files.
 164    *
 165    * @param array $files
 166    *   List of file names.
 167    * @param string $delim
 168    *   An optional delimiter to put between files.
 169    * @return string
 170    */
 171   public static function concat($files, $delim = '') {
 172     $buf = '';
 173     $first = TRUE;
 174     foreach ($files as $file) {
 175       if (!$first) {
 176         $buf .= $delim;
 177       }
 178       $buf .= file_get_contents($file);
 179       $first = FALSE;
 180     }
 181     return $buf;
 182   }
 183
 184   /**
 185    * @param string $source
 186    * @param string $destination
 187    */
 188   public static function copyDir($source, $destination) {
 189     if ($dh = opendir($source)) {
 190       @mkdir($destination);
 191       while (FALSE !== ($file = readdir($dh))) {
 192         if (($file != '.') && ($file != '..')) {
 193           if (is_dir($source . DIRECTORY_SEPARATOR . $file)) {
 194             CRM_Utils_File::copyDir($source . DIRECTORY_SEPARATOR . $file, $destination . DIRECTORY_SEPARATOR . $file);
 195           }
 196           else {
 197             copy($source . DIRECTORY_SEPARATOR . $file, $destination . DIRECTORY_SEPARATOR . $file);
 198           }
 199         }
 200       }
 201       closedir($dh);
 202     }
 203   }
 204
 205   /**
 206    * Given a file name, recode it (in place!) to UTF-8
 207    *
 208    * @param string $name
 209    *   Name of file.
 210    *
 211    * @return bool
 212    *   whether the file was recoded properly
 213    */
 214   public static function toUtf8($name) {
 215     static $config = NULL;
 216     static $legacyEncoding = NULL;
 217     if ($config == NULL) {
 218       $config = CRM_Core_Config::singleton();
 219       $legacyEncoding = $config->legacyEncoding;
 220     }
 221
 222     if (!function_exists('iconv')) {
 223
 224       return FALSE;
 225
 226     }
 227
 228     $contents = file_get_contents($name);
 229     if ($contents === FALSE) {
 230       return FALSE;
 231     }
 232
 233     $contents = iconv($legacyEncoding, 'UTF-8', $contents);
 234     if ($contents === FALSE) {
 235       return FALSE;
 236     }
 237
 238     $file = fopen($name, 'w');
 239     if ($file === FALSE) {
 240       return FALSE;
 241     }
 242
 243     $written = fwrite($file, $contents);
 244     $closed = fclose($file);
 245     if ($written === FALSE or !$closed) {
 246       return FALSE;
 247     }
 248
 249     return TRUE;
 250   }
 251
 252   /**
 253    * Appends a slash to the end of a string if it doesn't already end with one
 254    *
 255    * @param string $path
 256    * @param string $slash
 257    *
 258    * @return string
 259    */
 260   public static function addTrailingSlash($path, $slash = NULL) {
 261     if (!$slash) {
 262       // FIXME: Defaulting to backslash on windows systems can produce
 263       // unexpected results, esp for URL strings which should always use forward-slashes.
 264       // I think this fn should default to forward-slash instead.
 265       $slash = DIRECTORY_SEPARATOR;
 266     }
 267     if (!in_array(substr($path, -1, 1), ['/', '\\'])) {
 268       $path .= $slash;
 269     }
 270     return $path;
 271   }
 272
 273   /**
 274    * Save a fake file somewhere
 275    *
 276    * @param string $dir
 277    *   The directory where the file should be saved.
 278    * @param string $contents
 279    *   Optional: the contents of the file.
 280    * @param string $fileName
 281    *
 282    * @return string
 283    *   The filename saved, or FALSE on failure.
 284    */
 285   public static function createFakeFile($dir, $contents = 'delete me', $fileName = NULL) {
 286     $dir = self::addTrailingSlash($dir);
 287     if (!$fileName) {
 288       $fileName = 'delete-this-' . CRM_Utils_String::createRandom(10, CRM_Utils_String::ALPHANUMERIC);
 289     }
 290     $success = @file_put_contents($dir . $fileName, $contents);
 291
 292     return ($success === FALSE) ? FALSE : $fileName;
 293   }
 294
 295   /**
 296    * @param string|NULL $dsn
 297    *   Use NULL to load the default/active connection from CRM_Core_DAO.
 298    *   Otherwise, give a full DSN string.
 299    * @param string $fileName
 300    * @param string $prefix
 301    * @param bool $dieOnErrors
 302    */
 303   public static function sourceSQLFile($dsn, $fileName, $prefix = NULL, $dieOnErrors = TRUE) {
 304     if (FALSE === file_get_contents($fileName)) {
 305       // Our file cannot be found.
 306       // Using 'die' here breaks this on extension upgrade.
 307       throw new CRM_Core_Exception('Could not find the SQL file.');
 308     }
 309
 310     self::runSqlQuery($dsn, file_get_contents($fileName), $prefix, $dieOnErrors);
 311   }
 312
 313   /**
 314    *
 315    * @param string|NULL $dsn
 316    * @param string $queryString
 317    * @param string $prefix
 318    * @param bool $dieOnErrors
 319    */
 320   public static function runSqlQuery($dsn, $queryString, $prefix = NULL, $dieOnErrors = TRUE) {
 321     $string = $prefix . $queryString;
 322
 323     if ($dsn === NULL) {
 324       $db = CRM_Core_DAO::getConnection();
 325     }
 326     else {
 327       require_once 'DB.php';
 328       $db = DB::connect($dsn);
 329     }
 330
 331     if (PEAR::isError($db)) {
 332       die("Cannot open $dsn: " . $db->getMessage());
 333     }
 334     if (CRM_Utils_Constant::value('CIVICRM_MYSQL_STRICT', CRM_Utils_System::isDevelopment())) {
 335       $db->query('SET SESSION sql_mode = STRICT_TRANS_TABLES');
 336     }
 337     $db->query('SET NAMES utf8');
 338     $transactionId = CRM_Utils_Type::escape(CRM_Utils_Request::id(), 'String');
 339     $db->query('SET @uniqueID = ' . "'$transactionId'");
 340
 341     // get rid of comments starting with # and --
 342
 343     $string = self::stripComments($string);
 344
 345     $queries = preg_split('/;\s*$/m', $string);
 346     foreach ($queries as $query) {
 347       $query = trim($query);
 348       if (!empty($query)) {
 349         CRM_Core_Error::debug_query($query);
 350         $res = &$db->query($query);
 351         if (PEAR::isError($res)) {
 352           if ($dieOnErrors) {
 353             die("Cannot execute $query: " . $res->getMessage());
 354           }
 355           else {
 356             echo "Cannot execute $query: " . $res->getMessage() . "<p>";
 357           }
 358         }
 359       }
 360     }
 361   }
 362
 363   /**
 364    *
 365    * Strips comment from a possibly multiline SQL string
 366    *
 367    * @param string $string
 368    *
 369    * @return string
 370    *   stripped string
 371    */
 372   public static function stripComments($string) {
 373     return preg_replace("/^(#|--).*\R*/m", "", $string);
 374   }
 375
 376   /**
 377    * @param $ext
 378    *
 379    * @return bool
 380    */
 381   public static function isExtensionSafe($ext) {
 382     static $extensions = NULL;
 383     if (!$extensions) {
 384       $extensions = CRM_Core_OptionGroup::values('safe_file_extension', TRUE);
 385
 386       // make extensions to lowercase
 387       $extensions = array_change_key_case($extensions, CASE_LOWER);
 388       // allow html/htm extension ONLY if the user is admin
 389       // and/or has access CiviMail
 390       if (!(CRM_Core_Permission::check('access CiviMail') ||
 391         CRM_Core_Permission::check('administer CiviCRM') ||
 392         (CRM_Mailing_Info::workflowEnabled() &&
 393           CRM_Core_Permission::check('create mailings')
 394         )
 395       )
 396       ) {
 397         unset($extensions['html']);
 398         unset($extensions['htm']);
 399       }
 400     }
 401     // support lower and uppercase file extensions
 402     return isset($extensions[strtolower($ext)]) ? TRUE : FALSE;
 403   }
 404
 405   /**
 406    * Determine whether a given file is listed in the PHP include path.
 407    *
 408    * @param string $name
 409    *   Name of file.
 410    *
 411    * @return bool
 412    *   whether the file can be include()d or require()d
 413    */
 414   public static function isIncludable($name) {
 415     $x = @fopen($name, 'r', TRUE);
 416     if ($x) {
 417       fclose($x);
 418       return TRUE;
 419     }
 420     else {
 421       return FALSE;
 422     }
 423   }
 424
 425   /**
 426    * Remove the 32 bit md5 we add to the fileName also remove the unknown tag if we added it.
 427    *
 428    * @param $name
 429    *
 430    * @return mixed
 431    */
 432   public static function cleanFileName($name) {
 433     // replace the last 33 character before the '.' with null
 434     $name = preg_replace('/(_[\w]{32})\./', '.', $name);
 435     return $name;
 436   }
 437
 438   /**
 439    * Make a valid file name.
 440    *
 441    * @param string $name
 442    *
 443    * @return string
 444    */
 445   public static function makeFileName($name) {
 446     $uniqID = md5(uniqid(rand(), TRUE));
 447     $info = pathinfo($name);
 448     $basename = substr($info['basename'],
 449       0, -(strlen(CRM_Utils_Array::value('extension', $info)) + (CRM_Utils_Array::value('extension', $info) == '' ? 0 : 1))
 450     );
 451     if (!self::isExtensionSafe(CRM_Utils_Array::value('extension', $info))) {
 452       // munge extension so it cannot have an embbeded dot in it
 453       // The maximum length of a filename for most filesystems is 255 chars.
 454       // We'll truncate at 240 to give some room for the extension.
 455       return CRM_Utils_String::munge("{$basename}_" . CRM_Utils_Array::value('extension', $info) . "_{$uniqID}", '_', 240) . ".unknown";
 456     }
 457     else {
 458       return CRM_Utils_String::munge("{$basename}_{$uniqID}", '_', 240) . "." . CRM_Utils_Array::value('extension', $info);
 459     }
 460   }
 461
 462   /**
 463    * Copies a file
 464    *
 465    * @param $filePath
 466    * @return mixed
 467    */
 468   public static function duplicate($filePath) {
 469     $oldName = pathinfo($filePath, PATHINFO_FILENAME);
 470     $uniqID = md5(uniqid(rand(), TRUE));
 471     $newName = preg_replace('/(_[\w]{32})$/', '', $oldName) . '_' . $uniqID;
 472     $newPath = str_replace($oldName, $newName, $filePath);
 473     copy($filePath, $newPath);
 474     return $newPath;
 475   }
 476
 477   /**
 478    * Get files for the extension.
 479    *
 480    * @param string $path
 481    * @param string $ext
 482    *
 483    * @return array
 484    */
 485   public static function getFilesByExtension($path, $ext) {
 486     $path = self::addTrailingSlash($path);
 487     $files = [];
 488     if ($dh = opendir($path)) {
 489       while (FALSE !== ($elem = readdir($dh))) {
 490         if (substr($elem, -(strlen($ext) + 1)) == '.' . $ext) {
 491           $files[] .= $path . $elem;
 492         }
 493       }
 494       closedir($dh);
 495     }
 496     return $files;
 497   }
 498
 499   /**
 500    * Restrict access to a given directory (by planting there a restrictive .htaccess file)
 501    *
 502    * @param string $dir
 503    *   The directory to be secured.
 504    * @param bool $overwrite
 505    */
 506   public static function restrictAccess($dir, $overwrite = FALSE) {
 507     // note: empty value for $dir can play havoc, since that might result in putting '.htaccess' to root dir
 508     // of site, causing site to stop functioning.
 509     // FIXME: we should do more checks here -
 510     if (!empty($dir) && is_dir($dir)) {
 511       $htaccess = <<<HTACCESS
 512 <Files "*">
 513 # Apache 2.2
 514   <IfModule !authz_core_module>
 515     Order allow,deny
 516     Deny from all
 517   </IfModule>
 518
 519 # Apache 2.4+
 520   <IfModule authz_core_module>
 521     Require all denied
 522   </IfModule>
 523 </Files>
 524
 525 HTACCESS;
 526       $file = $dir . '.htaccess';
 527       if ($overwrite || !file_exists($file)) {
 528         if (file_put_contents($file, $htaccess) === FALSE) {
 529           CRM_Core_Error::movedSiteError($file);
 530         }
 531       }
 532     }
 533   }
 534
 535   /**
 536    * Restrict remote users from browsing the given directory.
 537    *
 538    * @param $publicDir
 539    */
 540   public static function restrictBrowsing($publicDir) {
 541     if (!is_dir($publicDir) || !is_writable($publicDir)) {
 542       return;
 543     }
 544
 545     // base dir
 546     $nobrowse = realpath($publicDir) . '/index.html';
 547     if (!file_exists($nobrowse)) {
 548       @file_put_contents($nobrowse, '');
 549     }
 550
 551     // child dirs
 552     $dir = new RecursiveDirectoryIterator($publicDir);
 553     foreach ($dir as $name => $object) {
 554       if (is_dir($name) && $name != '..') {
 555         $nobrowse = realpath($name) . '/index.html';
 556         if (!file_exists($nobrowse)) {
 557           @file_put_contents($nobrowse, '');
 558         }
 559       }
 560     }
 561   }
 562
 563   /**
 564    * (Deprecated) Create the file-path from which all other internal paths are
 565    * computed. This implementation determines it as `dirname(CIVICRM_TEMPLATE_COMPILEDIR)`.
 566    *
 567    * This approach is problematic - e.g. it prevents one from authentically
 568    * splitting the CIVICRM_TEMPLATE_COMPILEDIR away from other dirs. The implementation
 569    * is preserved for backwards compatibility (and should only be called by
 570    * CMS-adapters and by Civi\Core\Paths).
 571    *
 572    * Do not use it for new path construction logic. Instead, use Civi::paths().
 573    *
 574    * @deprecated
 575    * @see \Civi::paths()
 576    * @see \Civi\Core\Paths
 577    */
 578   public static function baseFilePath() {
 579     static $_path = NULL;
 580     if (!$_path) {
 581       // Note: Don't rely on $config; that creates a dependency loop.
 582       if (!defined('CIVICRM_TEMPLATE_COMPILEDIR')) {
 583         throw new RuntimeException("Undefined constant: CIVICRM_TEMPLATE_COMPILEDIR");
 584       }
 585       $templateCompileDir = CIVICRM_TEMPLATE_COMPILEDIR;
 586
 587       $path = dirname($templateCompileDir);
 588
 589       //this fix is to avoid creation of upload dirs inside templates_c directory
 590       $checkPath = explode(DIRECTORY_SEPARATOR, $path);
 591
 592       $cnt = count($checkPath) - 1;
 593       if ($checkPath[$cnt] == 'templates_c') {
 594         unset($checkPath[$cnt]);
 595         $path = implode(DIRECTORY_SEPARATOR, $checkPath);
 596       }
 597
 598       $_path = CRM_Utils_File::addTrailingSlash($path);
 599     }
 600     return $_path;
 601   }
 602
 603   /**
 604    * Determine if a path is absolute.
 605    *
 606    * @param string $path
 607    *
 608    * @return bool
 609    *   TRUE if absolute. FALSE if relative.
 610    */
 611   public static function isAbsolute($path) {
 612     if (substr($path, 0, 1) === DIRECTORY_SEPARATOR) {
 613       return TRUE;
 614     }
 615     if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 616       if (preg_match('!^[a-zA-Z]:[/\\\\]!', $path)) {
 617         return TRUE;
 618       }
 619     }
 620     return FALSE;
 621   }
 622
 623   /**
 624    * @param $directory
 625    *
 626    * @return string
 627    * @deprecated
 628    *   Computation of a relative path requires some base.
 629    *   This implementation is problematic because it relies on an
 630    *   implicit base which was constructed problematically.
 631    */
 632   public static function relativeDirectory($directory) {
 633     // Do nothing on windows
 634     if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 635       return $directory;
 636     }
 637
 638     // check if directory is relative, if so return immediately
 639     if (!self::isAbsolute($directory)) {
 640       return $directory;
 641     }
 642
 643     // make everything relative from the baseFilePath
 644     $basePath = self::baseFilePath();
 645     // check if basePath is a substr of $directory, if so
 646     // return rest of string
 647     if (substr($directory, 0, strlen($basePath)) == $basePath) {
 648       return substr($directory, strlen($basePath));
 649     }
 650
 651     // return the original value
 652     return $directory;
 653   }
 654
 655   /**
 656    * @param $directory
 657    * @param string $basePath
 658    *   The base path when evaluating relative paths. Should include trailing slash.
 659    *
 660    * @return string
 661    */
 662   public static function absoluteDirectory($directory, $basePath) {
 663     // check if directory is already absolute, if so return immediately
 664     // Note: Windows PHP accepts any mix of "/" or "\", so "C:\htdocs" or "C:/htdocs" would be a valid absolute path
 665     if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' && preg_match(';^[a-zA-Z]:[/\\\\];', $directory)) {
 666       return $directory;
 667     }
 668
 669     // check if directory is already absolute, if so return immediately
 670     if (substr($directory, 0, 1) == DIRECTORY_SEPARATOR) {
 671       return $directory;
 672     }
 673
 674     if ($basePath === NULL) {
 675       // Previous versions interpreted `NULL` to mean "default to `self::baseFilePath()`".
 676       // However, no code in the known `universe` relies on this interpretation, and
 677       // the `baseFilePath()` function is problematic/deprecated.
 678       throw new \RuntimeException("absoluteDirectory() requires specifying a basePath");
 679     }
 680
 681     // ensure that $basePath has a trailing slash
 682     $basePath = self::addTrailingSlash($basePath);
 683     return $basePath . $directory;
 684   }
 685
 686   /**
 687    * Make a file path relative to some base dir.
 688    *
 689    * @param $directory
 690    * @param $basePath
 691    *
 692    * @return string
 693    */
 694   public static function relativize($directory, $basePath) {
 695     if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
 696       $directory = strtr($directory, '\\', '/');
 697       $basePath = strtr($basePath, '\\', '/');
 698     }
 699     if (substr($directory, 0, strlen($basePath)) == $basePath) {
 700       return substr($directory, strlen($basePath));
 701     }
 702     else {
 703       return $directory;
 704     }
 705   }
 706
 707   /**
 708    * Create a path to a temporary file which can endure for multiple requests.
 709    *
 710    * @todo Automatic file cleanup using, eg, TTL policy
 711    *
 712    * @param string $prefix
 713    *
 714    * @return string, path to an openable/writable file
 715    * @see tempnam
 716    */
 717   public static function tempnam($prefix = 'tmp-') {
 718     // $config = CRM_Core_Config::singleton();
 719     // $nonce = md5(uniqid() . $config->dsn . $config->userFrameworkResourceURL);
 720     // $fileName = "{$config->configAndLogDir}" . $prefix . $nonce . $suffix;
 721     $fileName = tempnam(sys_get_temp_dir(), $prefix);
 722     return $fileName;
 723   }
 724
 725   /**
 726    * Create a path to a temporary directory which can endure for multiple requests.
 727    *
 728    * @todo Automatic file cleanup using, eg, TTL policy
 729    *
 730    * @param string $prefix
 731    *
 732    * @return string, path to an openable/writable directory; ends with '/'
 733    * @see tempnam
 734    */
 735   public static function tempdir($prefix = 'tmp-') {
 736     $fileName = self::tempnam($prefix);
 737     unlink($fileName);
 738     mkdir($fileName, 0700);
 739     return $fileName . '/';
 740   }
 741
 742   /**
 743    * Search directory tree for files which match a glob pattern.
 744    *
 745    * Note: Dot-directories (like "..", ".git", or ".svn") will be ignored.
 746    *
 747    * @param string $dir
 748    *   base dir.
 749    * @param string $pattern
 750    *   glob pattern, eg "*.txt".
 751    * @param bool $relative
 752    *   TRUE if paths should be made relative to $dir
 753    * @return array(string)
 754    */
 755   public static function findFiles($dir, $pattern, $relative = FALSE) {
 756     if (!is_dir($dir)) {
 757       return [];
 758     }
 759     $dir = rtrim($dir, '/');
 760     $todos = [$dir];
 761     $result = [];
 762     while (!empty($todos)) {
 763       $subdir = array_shift($todos);
 764       $matches = glob("$subdir/$pattern");
 765       if (is_array($matches)) {
 766         foreach ($matches as $match) {
 767           if (!is_dir($match)) {
 768             $result[] = $relative ? CRM_Utils_File::relativize($match, "$dir/") : $match;
 769           }
 770         }
 771       }
 772       if ($dh = opendir($subdir)) {
 773         while (FALSE !== ($entry = readdir($dh))) {
 774           $path = $subdir . DIRECTORY_SEPARATOR . $entry;
 775           if ($entry{0} == '.') {
 776             // ignore
 777           }
 778           elseif (is_dir($path)) {
 779             $todos[] = $path;
 780           }
 781         }
 782         closedir($dh);
 783       }
 784     }
 785     return $result;
 786   }
 787
 788   /**
 789    * Determine if $child is a sub-directory of $parent
 790    *
 791    * @param string $parent
 792    * @param string $child
 793    * @param bool $checkRealPath
 794    *
 795    * @return bool
 796    */
 797   public static function isChildPath($parent, $child, $checkRealPath = TRUE) {
 798     if ($checkRealPath) {
 799       $parent = realpath($parent);
 800       $child = realpath($child);
 801     }
 802     $parentParts = explode('/', rtrim($parent, '/'));
 803     $childParts = explode('/', rtrim($child, '/'));
 804     while (($parentPart = array_shift($parentParts)) !== NULL) {
 805       $childPart = array_shift($childParts);
 806       if ($parentPart != $childPart) {
 807         return FALSE;
 808       }
 809     }
 810     if (empty($childParts)) {
 811       // same directory
 812       return FALSE;
 813     }
 814     else {
 815       return TRUE;
 816     }
 817   }
 818
 819   /**
 820    * Move $fromDir to $toDir, replacing/deleting any
 821    * pre-existing content.
 822    *
 823    * @param string $fromDir
 824    *   The directory which should be moved.
 825    * @param string $toDir
 826    *   The new location of the directory.
 827    * @param bool $verbose
 828    *
 829    * @return bool
 830    *   TRUE on success
 831    */
 832   public static function replaceDir($fromDir, $toDir, $verbose = FALSE) {
 833     if (is_dir($toDir)) {
 834       if (!self::cleanDir($toDir, TRUE, $verbose)) {
 835         return FALSE;
 836       }
 837     }
 838
 839     // return rename($fromDir, $toDir); CRM-11987, https://bugs.php.net/bug.php?id=54097
 840
 841     CRM_Utils_File::copyDir($fromDir, $toDir);
 842     if (!CRM_Utils_File::cleanDir($fromDir, TRUE, FALSE)) {
 843       CRM_Core_Session::setStatus(ts('Failed to clean temp dir: %1', [1 => $fromDir]), '', 'alert');
 844       return FALSE;
 845     }
 846     return TRUE;
 847   }
 848
 849   /**
 850    * Format file.
 851    *
 852    * @param array $param
 853    * @param string $fileName
 854    * @param array $extraParams
 855    */
 856   public static function formatFile(&$param, $fileName, $extraParams = []) {
 857     if (empty($param[$fileName])) {
 858       return;
 859     }
 860
 861     $fileParams = [
 862       'uri' => $param[$fileName]['name'],
 863       'type' => $param[$fileName]['type'],
 864       'location' => $param[$fileName]['name'],
 865       'upload_date' => date('YmdHis'),
 866     ] + $extraParams;
 867
 868     $param[$fileName] = $fileParams;
 869   }
 870
 871   /**
 872    * Return formatted file URL, like for image file return image url with image icon
 873    *
 874    * @param string $path
 875    *   Absoulte file path
 876    * @param string $fileType
 877    * @param string $url
 878    *   File preview link e.g. https://example.com/civicrm/file?reset=1&filename=image.png&mime-type=image/png
 879    *
 880    * @return string $url
 881    */
 882   public static function getFileURL($path, $fileType, $url = NULL) {
 883     if (empty($path) || empty($fileType)) {
 884       return '';
 885     }
 886     elseif (empty($url)) {
 887       $fileName = basename($path);
 888       $url = CRM_Utils_System::url('civicrm/file', "reset=1&filename={$fileName}&mime-type={$fileType}");
 889     }
 890     switch ($fileType) {
 891       case 'image/jpeg':
 892       case 'image/pjpeg':
 893       case 'image/gif':
 894       case 'image/x-png':
 895       case 'image/png':
 896       case 'image/jpg':
 897         list($imageWidth, $imageHeight) = getimagesize($path);
 898         list($imageThumbWidth, $imageThumbHeight) = CRM_Contact_BAO_Contact::getThumbSize($imageWidth, $imageHeight);
 899         $url = "<a href=\"$url\" class='crm-image-popup'>
 900           <img src=\"$url\" width=$imageThumbWidth height=$imageThumbHeight/>
 901           </a>";
 902         break;
 903
 904       default:
 905         $url = sprintf('<a href="%s">%s</a>', $url, self::cleanFileName(basename($path)));
 906         break;
 907     }
 908
 909     return $url;
 910   }
 911
 912   /**
 913    * Return formatted image icon
 914    *
 915    * @param string $imageURL
 916    *   Contact's image url
 917    *
 918    * @return string $url
 919    */
 920   public static function getImageURL($imageURL) {
 921     // retrieve image name from $imageURL
 922     $imageURL = CRM_Utils_String::unstupifyUrl($imageURL);
 923     parse_str(parse_url($imageURL, PHP_URL_QUERY), $query);
 924
 925     $url = NULL;
 926     if (!empty($query['photo'])) {
 927       $path = CRM_Core_Config::singleton()->customFileUploadDir . $query['photo'];
 928     }
 929     else {
 930       $path = $url = $imageURL;
 931     }
 932     $fileExtension = strtolower(pathinfo($path, PATHINFO_EXTENSION));
 933     //According to (https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Complete_list_of_MIME_types),
 934     // there are some extensions that would need translating.:
 935     $translateMimeTypes = [
 936       'tif' => 'tiff',
 937       'jpg' => 'jpeg',
 938       'svg' => 'svg+xml',
 939     ];
 940     $mimeType = 'image/' . CRM_Utils_Array::value(
 941       $fileExtension,
 942       $translateMimeTypes,
 943       $fileExtension
 944     );
 945
 946     return self::getFileURL($path, $mimeType, $url);
 947   }
 948
 949   /**
 950    * Resize an image.
 951    *
 952    * @param string $sourceFile
 953    *   Filesystem path to existing image on server
 954    * @param int $targetWidth
 955    *   New width desired, in pixels
 956    * @param int $targetHeight
 957    *   New height desired, in pixels
 958    * @param string $suffix = ""
 959    *   If supplied, the image will be renamed to include this suffix. For
 960    *   example if the original file name is "foo.png" and $suffix = "_bar",
 961    *   then the final file name will be "foo_bar.png".
 962    * @param bool $preserveAspect = TRUE
 963    *   When TRUE $width and $height will be used as a bounding box, outside of
 964    *   which the resized image will not extend.
 965    *   When FALSE, the image will be resized exactly to $width and $height, even
 966    *   if it means stretching it.
 967    *
 968    * @return string
 969    *   Path to image
 970    * @throws \CRM_Core_Exception
 971    *   Under the following conditions
 972    *   - When GD is not available.
 973    *   - When the source file is not an image.
 974    */
 975   public static function resizeImage($sourceFile, $targetWidth, $targetHeight, $suffix = "", $preserveAspect = TRUE) {
 976
 977     // Check if GD is installed
 978     $gdSupport = CRM_Utils_System::getModuleSetting('gd', 'GD Support');
 979     if (!$gdSupport) {
 980       throw new CRM_Core_Exception(ts('Unable to resize image because the GD image library is not currently compiled in your PHP installation.'));
 981     }
 982
 983     $sourceMime = mime_content_type($sourceFile);
 984     if ($sourceMime == 'image/gif') {
 985       $sourceData = imagecreatefromgif($sourceFile);
 986     }
 987     elseif ($sourceMime == 'image/png') {
 988       $sourceData = imagecreatefrompng($sourceFile);
 989     }
 990     elseif ($sourceMime == 'image/jpeg') {
 991       $sourceData = imagecreatefromjpeg($sourceFile);
 992     }
 993     else {
 994       throw new CRM_Core_Exception(ts('Unable to resize image because the file supplied was not an image.'));
 995     }
 996
 997     // get image about original image
 998     $sourceInfo = getimagesize($sourceFile);
 999     $sourceWidth = $sourceInfo[0];
1000     $sourceHeight = $sourceInfo[1];
1001
1002     // Adjust target width/height if preserving aspect ratio
1003     if ($preserveAspect) {
1004       $sourceAspect = $sourceWidth / $sourceHeight;
1005       $targetAspect = $targetWidth / $targetHeight;
1006       if ($sourceAspect > $targetAspect) {
1007         $targetHeight = $targetWidth / $sourceAspect;
1008       }
1009       if ($sourceAspect < $targetAspect) {
1010         $targetWidth = $targetHeight * $sourceAspect;
1011       }
1012     }
1013
1014     // figure out the new filename
1015     $pathParts = pathinfo($sourceFile);
1016     $targetFile = $pathParts['dirname'] . DIRECTORY_SEPARATOR
1017       . $pathParts['filename'] . $suffix . "." . $pathParts['extension'];
1018
1019     $targetData = imagecreatetruecolor($targetWidth, $targetHeight);
1020
1021     // resize
1022     imagecopyresized($targetData, $sourceData,
1023       0, 0, 0, 0,
1024       $targetWidth, $targetHeight, $sourceWidth, $sourceHeight);
1025
1026     // save the resized image
1027     $fp = fopen($targetFile, 'w+');
1028     ob_start();
1029     imagejpeg($targetData);
1030     $image_buffer = ob_get_contents();
1031     ob_end_clean();
1032     imagedestroy($targetData);
1033     fwrite($fp, $image_buffer);
1034     rewind($fp);
1035     fclose($fp);
1036
1037     // return the URL to link to
1038     $config = CRM_Core_Config::singleton();
1039     return $config->imageUploadURL . basename($targetFile);
1040   }
1041
1042   /**
1043    * Get file icon class for specific MIME Type
1044    *
1045    * @param string $mimeType
1046    * @return string
1047    */
1048   public static function getIconFromMimeType($mimeType) {
1049     if (!isset(Civi::$statics[__CLASS__]['mimeIcons'])) {
1050       Civi::$statics[__CLASS__]['mimeIcons'] = json_decode(file_get_contents(__DIR__ . '/File/mimeIcons.json'), TRUE);
1051     }
1052     $iconClasses = Civi::$statics[__CLASS__]['mimeIcons'];
1053     foreach ($iconClasses as $text => $icon) {
1054       if (strpos($mimeType, $text) === 0) {
1055         return $icon;
1056       }
1057     }
1058     return $iconClasses['*'];
1059   }
1060
1061   /**
1062    * Is the filename a safe and valid filename passed in from URL
1063    *
1064    * @param string $fileName
1065    * @return bool
1066    */
1067   public static function isValidFileName($fileName = NULL) {
1068     if ($fileName) {
1069       $check = $fileName !== basename($fileName) ? FALSE : TRUE;
1070       if ($check) {
1071         if (substr($fileName, 0, 1) == '/' || substr($fileName, 0, 1) == '.' || substr($fileName, 0, 1) == DIRECTORY_SEPARATOR) {
1072           $check = FALSE;
1073         }
1074       }
1075       return $check;
1076     }
1077     return FALSE;
1078   }
1079
1080   /**
1081    * Get the extensions that this MimeTpe is for
1082    * @param string $mimeType the mime-type we want extensions for
1083    * @return array
1084    */
1085   public static function getAcceptableExtensionsForMimeType($mimeType = NULL) {
1086     $mapping = \MimeType\Mapping::$types;
1087     $extensions = [];
1088     foreach ($mapping as $extension => $type) {
1089       if ($mimeType == $type) {
1090         $extensions[] = $extension;
1091       }
1092     }
1093     return $extensions;
1094   }
1095
1096   /**
1097    * Get the extension of a file based on its path
1098    * @param string $path path of the file to query
1099    * @return string
1100    */
1101   public static function getExtensionFromPath($path) {
1102     return pathinfo($path, PATHINFO_EXTENSION);
1103   }
1104
1105 }