#SamsonPHP File service

This module gives abstraction level for working with file system independently of what exact file system is being used.

##Configuration

The main goal is to configure the $fileServiceClassName service parameter.

This is usually done using SamsonPHP module/service configuration

By default $fileServiceClassName is set to samson\fs\LocalFileService - it uses standard local file system service which is implemented by SamsonPHP local file service php_fs_local. This parameter has to be set to file service class name, for example - local file service - samson\fs\LocalFileService, no module/service identifiers or anything else should be used, first namespace separator \ should be avoided too:

• \samson\fs\LocalFileService - incorrect
• samson\fs\LocalFileService - correct

When service is initialized it checks if configured file service class is present otherwise fatal error is signaled.

This gives you ability, for example, to quickly change your web-application file system from local file system to Amazon Web Services S3 bucket, which is implemented by SamsonPHP AWS file service php_fs_aws. All you have to do is add configuration for this SamsonPHP file service(fs):

class FileServiceConfig extends \samson\core\Config 
{
  /**@var string Configured module/service identifier */
  public $__id = 'fs';
  
  /**@var string Set Amazon Web Services as web-application file service using its identifier */
  public $fileServiceID = 'samson\fs\AWSFileService';
}

Usage

To work with this SamsonPHP file service you should get file service instance pointer:

/**@var \samson\fs\FileService $fs Pointer to file service */
$fs = & m('fs');

After this you can use all available methods from AbstractFileService interface, which this SamsonPHP file service(fs) implements. All this method call act like a proxy and passes them to currently configured file service(by default php_fs_local).

Example usage:

if (!$fs->exists(...)) {
  $fs->write(...);
}

Using service in tests

First of all you should create service instance:

// Create instance
$this->fileService = new FileService(__DIR__.'../');

In other places called after service creation you should retrieve service object via factory method:

// Get instance using services factory as error will signal other way
$this->fileService = \samson\core\Service::getInstance('samson\fs\FileService');

All other SamsonPHP modules must and use this file service approach when working with files.