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FileList.php
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Wed, May 15, 02:16

FileList.php
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<?php
/**
* A list of files, primarily useful for parsing command line arguments. This
* class makes it easier to deal with user-specified lists of files and
* directories used by command line tools.
*
* $list = new FileList(array_slice($argv, 1));
* foreach ($some_files as $file) {
* if ($list->contains($file)) {
* do_something_to_this($file);
* }
* }
*
* This sort of construction will allow the user to type "src" in order
* to indicate 'all relevant files underneath "src/"'.
*
* @task create Creating a File List
* @task test Testing File Lists
*/
final class FileList {
private $files = array();
private $dirs = array();
/**
* Build a new FileList from an array of paths, e.g. from $argv.
*
* @param list List of relative or absolute file paths.
* @return this
* @task create
*/
public function __construct($paths) {
foreach ($paths as $path) {
$path = Filesystem::resolvePath($path);
if (is_dir($path)) {
$path = rtrim($path, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
$this->dirs[$path] = true;
}
$this->files[] = $path;
}
}
/**
* Determine if a path is one of the paths in the list. Note that an empty
* file list is considered to contain every file.
*
* @param string Relative or absolute system file path.
* @param bool If true, consider the path to be contained in the list if
* the list contains a parent directory. If false, require
* that the path be part of the list explicitly.
* @return bool If true, the file is in the list.
* @task test
*/
public function contains($path, $allow_parent_directory = true) {
if ($this->isEmpty()) {
return true;
}
$path = Filesystem::resolvePath($path);
if (is_dir($path)) {
$path .= DIRECTORY_SEPARATOR;
}
foreach ($this->files as $file) {
if ($file == $path) {
return true;
}
if ($allow_parent_directory) {
$len = strlen($file);
if (isset($this->dirs[$file]) && !strncmp($file, $path, $len)) {
return true;
}
}
}
return false;
}
/**
* Check if the file list is empty -- that is, it contains no files.
*
* @return bool If true, the list is empty.
* @task test
*/
public function isEmpty() {
return !$this->files;
}
}

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