<?php
/**
 * Media renamer for Obfuscated file names sometimes found when downloading from usenet.
 * This script will find scan all directories in $in_path.
 * For each directory, it will search for a media file.
 * If a media file is found, it will copy that file into the "output path" while also renaming the file to the "basepath" of the containing directory.
 */

$find_extensions = ['mkv','avi'];
$remove_from_filename = ['-Obfuscated','-postbot'];

$in_path = __DIR__;
$out_path = __DIR__ . DIRECTORY_SEPARATOR . 'renamed';

if (!file_exists($in_path)) {
	die('Input path does not exist');
}

if (!file_exists($out_path)) {
	mkdir($out_path, 0755, true);
}

$iter = new RecursiveIteratorIterator(
    new RecursiveDirectoryIterator($in_path, RecursiveDirectoryIterator::SKIP_DOTS),
    RecursiveIteratorIterator::SELF_FIRST,
    RecursiveIteratorIterator::CATCH_GET_CHILD // Ignore "Permission denied"
);

// Iterate over all directories in a given path and collect them into an array
$paths = [];
foreach ($iter as $path => $dir) {
    if ($dir->isDir()) {
        $paths[] = $path;
    }
}
// Remove output path from list if it's inside the input path!
if (($_key = array_search($out_path, $paths)) !== false) {
    unset($paths[$_key]);
}
unset($_key); // clean up


// For each directory, find a media file inside it.
foreach ( $paths as $path ) {

	echo "\n---";
	echo "\nWorking on: " . $path;

	// get all files in the given path.
	$scanned = array_diff(scandir($path), array('..', '.'));
	$filtered = array_filter ($scanned, function( $filename ) use ($find_extensions){
		// skip media files with "sample" in the name.
		if (stripos($filename, 'sample') !== false) {
			return false;
		}
		if (is_dir($filename)) {
			return false;
		}
		foreach ($find_extensions as $ext) {
			return ( $ext === pathinfo($filename, PATHINFO_EXTENSION) );
		}
	});

	if (count($filtered) < 1) {
		echo "\nNo media files found.";
	}

	if (count($filtered) > 1) {
		echo "\nMore than 1 media file found. Skipping.";
		continue;
	}

	// Since we're only expecting an array of 1 item, get first item from array.
	$media = array_pop($filtered);
	$old_fullpath = $path . DIRECTORY_SEPARATOR . $media;

	echo "\nFound media: " . $old_fullpath;

	$new_filename = pathinfo($path, PATHINFO_BASENAME);
	$new_filename = str_replace($remove_from_filename, '', $new_filename);

	$new_extension = pathinfo($media, PATHINFO_EXTENSION);
	$new_fullpath = $out_path . DIRECTORY_SEPARATOR . $new_filename . "." . $new_extension;

	// Rename the media file to the name of the directory (keeping the extension)
	echo "\nRenamed to: " . $new_fullpath;

	copy ($old_fullpath, $new_fullpath);

}

echo "\nComplete.\n";