#!/usr/bin/env php
<?php
// ------------------------------------------------------
// dir2json
//
// by Ryan, 2015
// http://www.ryadel.com/
// Gustavo Arnosti Neves - 2018
// https://github.com/tavinus
// ------------------------------------------------------
// Use -h or --help for help, eg:
//   > ./dir2json.php -h
//   > php dir2json.php --help
// ------------------------------------------------------

$DIR2JSON = '0.2.0';

function dir2json($dir)
{
    $dirList = [];
	
	$excludes = [
		".",
		"..",
		"Thumb.db",
		"Thumbs.db",
		".DS_Store",
		".DS_Store?",
		".Spotlight-V100",
		".Trashes",
		"ehthumbs.db",
	];

    if($handler = opendir($dir))
    {
        while (($content = readdir($handler)) !== FALSE)
        {
            if (!in_array($content, $excludes))
            {
                if(is_file($dir."/".$content)) $dirList[] = $content;
				else if(is_dir($dir."/".$content)) $dirList[$content] = dir2json($dir."/".$content); 
            } 
        }    
        closedir($handler); 
    } 
    return $dirList;    
}

// Long and short help opts
if ($argv[1] === "-h" || $argv[1] === "--help")
{
	echo <<<EOT
------------------------------------------------------
dir2json - v$DIR2JSON

by Ryan & Tavinus, 2015-2018
http://www.ryadel.com/
https://github.com/Darkseal/dir2json
------------------------------------------------------
		
USAGE (from CLI):
 > ./dir2json.php <targetFolder> <outputFile> [JSON_OPTIONS]

EXAMPLE:
 > ./dir2json.php ./ ./cache.json JSON_PRETTY_PRINT

HELP:
 > ./dir2json.php -h
		
JSON_OPTIONS is a bitmask consisting of:
  JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, 
  JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT, JSON_PRESERVE_ZERO_FRACTION, 
  JSON_UNESCAPED_UNICODE, JSON_PARTIAL_OUTPUT_ON_ERROR

The behaviour of these constants is described on the JSON constants page:
  http://php.net/manual/en/json.constants.php

for further info on PHP's json_encode function, read here:
  http://php.net/manual/en/function.json-encode.php

------------------------------------------------------

EOT;
    exit(0);
}

// Parse parameters
$targetFolder = isset($argv[1]) ? $argv[1] : null;
$outputFile   = isset($argv[2]) ? $argv[2] : null;
$jsonOptions  = isset($argv[3]) ? $argv[3] : null;
$jsonOptions  = empty($jsonOptions) ? 0 : constant($jsonOptions);

// If we have a folder to read
if (!is_dir($targetFolder)) {
	echo "Cannot open folder $targetFolder\n";
	exit(2);
}

// If we have and output file name
if (empty($outputFile)) {
    echo "Need a valid output file name (empty)\n";
	exit(3);
}

$arr  = dir2json($targetFolder);
$json = json_encode($arr, $jsonOptions);
if (!file_put_contents($outputFile, $json)) {
	echo "Could not save output file: $outputFile\n";
	exit(4);
}

exit(0);
?>