ElggFilestore.php

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<?php
abstract class ElggFilestore {
    abstract public function open(\ElggFile $file, $mode);

    abstract public function write($f, $data);

    abstract public function read($f, $length, $offset = 0);

    abstract public function seek($f, $position);

    abstract public function eof($f);

    abstract public function tell($f);

    abstract public function close($f);

    abstract public function delete(\ElggFile $file, $follow_symlinks = true);

    abstract public function getFileSize(\ElggFile $file);

    abstract public function getFilenameOnFilestore(\ElggFile $file);

    abstract public function getParameters();

    abstract public function setParameters(array $parameters);

    abstract public function grabFile(\ElggFile $file);

    abstract public function exists(\ElggFile $file);
}