PHP: rfc:streamline-phar-api

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====== Request for comments: Streamline Phar API ======

  * **Version:** 0.1
  * **Date:** 2008-03-28
  * **Author:** Lars Strojny, based on ideas from Elizabeth M. Smith, Marcus Boerger, Benjamin Schulz
  * **Status:** Under development

===== Abstract =====
This proposal aims to streamline the Phar API to make it more usable and intuitive. 
===== Basic change proposals =====


==== Phar ====
=== Modifying Phar archive content ===
== Related methods ==
  * offsetSet()
  * offsetGet()
  * offsetExists()
  * offsetUnset()
== Proposal ==
In the current API, every path is represented by a single array index. This is counter intuitive, as a multi-dimensional structure (the archive) is represented as a single dimensional array accessible object. The idea is to change that object to represent every path element (e.g. "bar" in "foo/bar/baz") as a single index. This would be accomplished by letting the DirectoryIterator implement ArrayAccess.
== Code ==
<code php>
$phar = new Phar('test.phar');
$phar['path']['to']['file'] = 'test'; // Set content 'test' in path/to/file
</code>

=== Adding isWritable() method ===
== Proposal ==
Add an isWritable() method to determine whether an archive can be written or not. Not being able to write an archive either means it is disabled in the php.ini (see Phar::canWrite()) or that PHP can't write to the requested location of the phar archive. PharFileInfo must overload the method in order to accomplish that.
== Code ==
<code php>
$phar = new Phar('test.phar');
if ($phar->isWritable()) {
    $phar['path']['to']['file'] = "test";
}
</code>

=== Adding createDirectory() ===
== Proposal ==
Add the method Phar->createDirectory() to explicitly create a new directory. createDirectory() will return another Phar object and takes a dirname (string) as an argument.
== Code ==
<code php>
$phar = new Phar('test.phar');
$dir = $phar->createDirectory('foo');
$dir['file'] = 'content'; // Set the file 'foo/file' to 'content'
</code>

=== Adding static create()-factory method ==
== Proposal ==
Add a static create method to allow the convenient creation of a Phar-archive from the file system. The create()-method will take two arguments. The first argument is a string with the path to the archive. The second argument is a string with the path to the directory containing the files to be added to the archive. create() will return a Phar-object.
== Code ==
<code php>
$phar = Phar::create('test.phar', 'path/to/source/dir'); // Adds every file and subdirectory to test.phar
</code>

==== SplFileInfo ====
PharFileInfo is derived from SplFileInfo. Every change in SplFileInfo will be visible in PharFileInfo.
=== setContent/getContent ===
== Proposal ==
Add two simple methods to write/retrieve content.
== Code ==
<code php>
$file = new SplFileInfo("file");
$file->setContent('foo');
echo $file->getContent(); // returns 'foo'
</code>
=== get*Time() methods ===
== Related methods ==
  * getMTime()
  * getATime()
  * getCTime()
== Proposal ==
Rename the methods to make them more independent from their origin, the UNIX naming scheme and therefore better to understand for a people with non-UNIX backgrounds. Leave the original method names but trigger deprecation warnings and remove them in PHP 6.
  * getMTime() => getModificationTime()
  * getATime() => getAccessTime()
  * getCTime() => getCreateTime()

==== PharFileInfo ====
=== setCompressed*() methods ===
== Related methods ==
   * setCompressedBZIP2()
   * setCompressedGZ()
   * setUncompressed()
== Proposal ==
Unify this methods to a single method compress(). The compress method will take one argument indicating the compression algorithm. The compression algorithm is represented as a Phar class constant. The setUncompressed() method should be renamed to uncompress().
== Code ==
<code php>
$file->compress(Phar::BZ2); // Compress with bzip2
$file->compress(Phar::GZ);  // Compress with gzip
$file->uncompress();
</code>
=== isCompressed*() methods ===
== Related methods ==
  * isCompressedBZIP2()
  * isCompressedGZ()
  * isCompressed()
== Proposal ==
Unify this methods to one PharFileInfo::isCompressed(). The new isCompressed() would take an optional argument with the compression algorithm. The compression algorithm is represented as a Phar class constant.
== Code ==
<code php>
$file->isCompressed(); // Is the file compressed at all?
$file->isCompressed(Phar::GZ); // Is the file gzip compressed?
$file->isCompressed(Phar::BZ2); // Is the file bzip compressed?
</code>

==== DirectoryIterator ====
=== Implement DirectoryIterator ===
Let DirectoryIterator implement the ArrayAccess interface. By accessing an array index of a directory iterator, the related SplFileInfo object is returned.
=== Code ===
<code php>
$iterator = new DirectoryIterator(__DIR__);
$file = $iterator['file'];
</code>

==== SplFileObject ====
=== Overload getContent()/setContent() ===
It is necessary to overload getContent()/setContent() in SplFileObject to properly reset internal flags. This is merely an implementation detail of the SplFileInfo::getContent()/setContent().

===== Extended change proposals =====
==== SplFileObject ====
=== Rename methods ===
== Renamed methods ==
  * eof() => isEndOfFile()
  * fflush() => flush()
  * fgetc() => getChar()
  * fgetcvs() => getCsv()
  * fgets() => getLine()
  * fgetss() => getStripped()
  * flock() => lock()
  * fpassthru() => getRest()
  * fseek() => seek()
  * fstat() => stat()
  * ftell() => getLine()
  * ftruncate() => truncate()
  * fwrite() => write()
== Proposal ==
 Rename this methods to make their names more OO-alike, but leave the old names as deprecated aliases and remove them in PHP 6. This belongs to the extended change proposal as it would be practical to do but is not strictly related to Phar.
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