1 files changed, 399 insertions, 0 deletions
diff --git a/engine/classes/ElggDiskFilestore.php b/engine/classes/ElggDiskFilestore.php
new file mode 100644
index 000000000..7aace43ba
--- /dev/null
+++ b/engine/classes/ElggDiskFilestore.php
@@ -0,0 +1,399 @@
+<?php
+/**
+ * A filestore that uses disk as storage.
+ *
+ * @warning This should be used by a wrapper class
+ * like {@link ElggFile}.
+ *
+ * @package    Elgg.Core
+ * @subpackage FileStore.Disk
+ * @link       http://docs.elgg.org/DataModel/FileStore/Disk
+ */
+class ElggDiskFilestore extends ElggFilestore {
+	/**
+	 * Directory root.
+	 */
+	private $dir_root;
+
+	/**
+	 * Default depth of file directory matrix
+	 */
+	private $matrix_depth = 5;
+
+	/**
+	 * Construct a disk filestore using the given directory root.
+	 *
+	 * @param string $directory_root Root directory, must end in "/"
+	 */
+	public function __construct($directory_root = "") {
+		global $CONFIG;
+
+		if ($directory_root) {
+			$this->dir_root = $directory_root;
+		} else {
+			$this->dir_root = $CONFIG->dataroot;
+		}
+	}
+
+	/**
+	 * Open a file for reading, writing, or both.
+	 *
+	 * @note All files are opened binary safe.
+	 * @warning This will try to create the a directory if it doesn't exist,
+	 * even in read-only mode.
+	 *
+	 * @param ElggFile $file The file to open
+	 * @param string   $mode read, write, or append.
+	 *
+	 * @throws InvalidParameterException
+	 * @return resource File pointer resource
+	 * @todo This really shouldn't try to create directories if not writing.
+	 */
+	public function open(ElggFile $file, $mode) {
+		$fullname = $this->getFilenameOnFilestore($file);
+
+		// Split into path and name
+		$ls = strrpos($fullname, "/");
+		if ($ls === false) {
+			$ls = 0;
+		}
+
+		$path = substr($fullname, 0, $ls);
+		$name = substr($fullname, $ls);
+
+		// Try and create the directory
+		try {
+			$this->makeDirectoryRoot($path);
+		} catch (Exception $e) {
+
+		}
+
+		if (($mode != 'write') && (!file_exists($fullname))) {
+			return false;
+		}
+
+		switch ($mode) {
+			case "read" :
+				$mode = "rb";
+				break;
+			case "write" :
+				$mode = "w+b";
+				break;
+			case "append" :
+				$mode = "a+b";
+				break;
+			default:
+				$msg = elgg_echo('InvalidParameterException:UnrecognisedFileMode', array($mode));
+				throw new InvalidParameterException($msg);
+		}
+
+		return fopen($fullname, $mode);
+
+	}
+
+	/**
+	 * Write data to a file.
+	 *
+	 * @param resource $f    File pointer resource
+	 * @param mixed    $data The data to write.
+	 *
+	 * @return bool
+	 */
+	public function write($f, $data) {
+		return fwrite($f, $data);
+	}
+
+	/**
+	 * Read data from a file.
+	 *
+	 * @param resource $f      File pointer resource
+	 * @param int      $length The number of bytes to read
+	 * @param inf      $offset The number of bytes to start after
+	 *
+	 * @return mixed Contents of file or false on fail.
+	 */
+	public function read($f, $length, $offset = 0) {
+		if ($offset) {
+			$this->seek($f, $offset);
+		}
+
+		return fread($f, $length);
+	}
+
+	/**
+	 * Close a file pointer
+	 *
+	 * @param resource $f A file pointer resource
+	 *
+	 * @return bool
+	 */
+	public function close($f) {
+		return fclose($f);
+	}
+
+	/**
+	 * Delete an ElggFile file.
+	 *
+	 * @param ElggFile $file File to delete
+	 *
+	 * @return bool
+	 */
+	public function delete(ElggFile $file) {
+		$filename = $this->getFilenameOnFilestore($file);
+		if (file_exists($filename)) {
+			return unlink($filename);
+		} else {
+			return true;
+		}
+	}
+
+	/**
+	 * Seek to the specified position.
+	 *
+	 * @param resource $f        File resource
+	 * @param int      $position Position in bytes
+	 *
+	 * @return bool
+	 */
+	public function seek($f, $position) {
+		return fseek($f, $position);
+	}
+
+	/**
+	 * Return the current location of the internal pointer
+	 *
+	 * @param resource $f File pointer resource
+	 *
+	 * @return int|false
+	 */
+	public function tell($f) {
+		return ftell($f);
+	}
+
+	/**
+	 * Tests for end of file on a file pointer
+	 *
+	 * @param resource $f File pointer resource
+	 *
+	 * @return bool
+	 */
+	public function eof($f) {
+		return feof($f);
+	}
+
+	/**
+	 * Returns the file size of an ElggFile file.
+	 *
+	 * @param ElggFile $file File object
+	 *
+	 * @return int The file size
+	 */
+	public function getFileSize(ElggFile $file) {
+		return filesize($this->getFilenameOnFilestore($file));
+	}
+
+	/**
+	 * Returns the filename as saved on disk for an ElggFile object
+	 *
+	 * @param ElggFile $file File object
+	 *
+	 * @return string The full path of where the file is stored
+	 */
+	public function getFilenameOnFilestore(ElggFile $file) {
+		$owner_guid = $file->getOwnerGuid();
+		if (!$owner_guid) {
+			$owner_guid = elgg_get_logged_in_user_guid();
+		}
+
+		if (!$owner_guid) {
+			$msg = elgg_echo('InvalidParameterException:MissingOwner',
+				array($file->getFilename(), $file->guid));
+			throw new InvalidParameterException($msg);
+		}
+
+		return $this->dir_root . $this->makefileMatrix($owner_guid) . $file->getFilename();
+	}
+
+	/**
+	 * Returns the contents of the ElggFile file.
+	 *
+	 * @param ElggFile $file File object
+	 *
+	 * @return mixed
+	 */
+	public function grabFile(ElggFile $file) {
+		return file_get_contents($file->getFilenameOnFilestore());
+	}
+
+	/**
+	 * Tests if an ElggFile file exists.
+	 *
+	 * @param ElggFile $file File object
+	 *
+	 * @return bool
+	 */
+	public function exists(ElggFile $file) {
+		return file_exists($this->getFilenameOnFilestore($file));
+	}
+
+	/**
+	 * Returns the size of all data stored under a directory in the disk store.
+	 *
+	 * @param string $prefix         Optional/ The prefix to check under.
+	 * @param string $container_guid The guid of the entity whose data you want to check.
+	 *
+	 * @return int|false
+	 */
+	public function getSize($prefix = '', $container_guid) {
+		if ($container_guid) {
+			return get_dir_size($this->dir_root . $this->makefileMatrix($container_guid) . $prefix);
+		} else {
+			return false;
+		}
+	}
+
+	/**
+	 * Create a directory $dirroot
+	 *
+	 * @param string $dirroot The full path of the directory to create
+	 *
+	 * @throws IOException
+	 * @return true
+	 * @deprecated 1.8 Use ElggDiskFilestore::makeDirectoryRoot()
+	 */
+	protected function make_directory_root($dirroot) {
+		elgg_deprecated_notice('ElggDiskFilestore::make_directory_root() is deprecated by ::makeDirectoryRoot()', 1.8);
+
+		return $this->makeDirectoryRoot($dirroot);
+	}
+
+	/**
+	 * Create a directory $dirroot
+	 *
+	 * @param string $dirroot The full path of the directory to create
+	 *
+	 * @throws IOException
+	 * @return true
+	 */
+	protected function makeDirectoryRoot($dirroot) {
+		if (!file_exists($dirroot)) {
+			if (!@mkdir($dirroot, 0700, true)) {
+				throw new IOException(elgg_echo('IOException:CouldNotMake', array($dirroot)));
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Multibyte string tokeniser.
+	 *
+	 * Splits a string into an array. Will fail safely if mbstring is
+	 * not installed.
+	 *
+	 * @param string $string  String
+	 * @param string $charset The charset, defaults to UTF8
+	 *
+	 * @return array
+	 * @deprecated 1.8 Files are stored by date and guid; no need for this.
+	 */
+	private function mb_str_split($string, $charset = 'UTF8') {
+		elgg_deprecated_notice('ElggDiskFilestore::mb_str_split() is deprecated.', 1.8);
+
+		if (is_callable('mb_substr')) {
+			$length = mb_strlen($string);
+			$array = array();
+
+			while ($length) {
+				$array[] = mb_substr($string, 0, 1, $charset);
+				$string = mb_substr($string, 1, $length, $charset);
+
+				$length = mb_strlen($string);
+			}
+
+			return $array;
+		} else {
+			return str_split($string);
+		}
+
+		return false;
+	}
+
+	/**
+	 * Construct a file path matrix for an entity.
+	 *
+	 * @param int $identifier The guide of the entity to store the data under.
+	 *
+	 * @return str The path where the entity's data will be stored.
+	 * @deprecated 1.8 Use ElggDiskFilestore::makeFileMatrix()
+	 */
+	protected function make_file_matrix($identifier) {
+		elgg_deprecated_notice('ElggDiskFilestore::make_file_matrix() is deprecated by ::makeFileMatrix()', 1.8);
+
+		return $this->makefileMatrix($identifier);
+	}
+
+	/**
+	 * Construct a file path matrix for an entity.
+	 *
+	 * @param int $guid The guide of the entity to store the data under.
+	 *
+	 * @return str The path where the entity's data will be stored.
+	 */
+	protected function makeFileMatrix($guid) {
+		$entity = get_entity($guid);
+
+		if (!($entity instanceof ElggEntity) || !$entity->time_created) {
+			return false;
+		}
+
+		$time_created = date('Y/m/d', $entity->time_created);
+
+		return "$time_created/$entity->guid/";
+	}
+
+	/**
+	 * Construct a filename matrix.
+	 *
+	 * Generates a matrix using the entity's creation time and
+	 * unique guid.
+	 *
+	 * File path matrixes are:
+	 * YYYY/MM/DD/guid/
+	 *
+	 * @param int $guid The entity to contrust a matrix for
+	 *
+	 * @return str The
+	 */
+	protected function user_file_matrix($guid) {
+		elgg_deprecated_notice('ElggDiskFilestore::user_file_matrix() is deprecated by ::makeFileMatrix()', 1.8);
+
+		return $this->makeFileMatrix($guid);
+	}
+
+	/**
+	 * Returns a list of attributes to save to the database when saving
+	 * the ElggFile object using this file store.
+	 *
+	 * @return array
+	 */
+	public function getParameters() {
+		return array("dir_root" => $this->dir_root);
+	}
+
+	/**
+	 * Sets parameters that should be saved to database.
+	 *
+	 * @param array $parameters Set parameters to save to DB for this filestore.
+	 *
+	 * @return bool
+	 */
+	public function setParameters(array $parameters) {
+		if (isset($parameters['dir_root'])) {
+			$this->dir_root = $parameters['dir_root'];
+			return true;
+		}
+
+		return false;
+	}
+}