<?php


	/* [0] Initialization
	=========================================================*/
	/* (1) Catch 'pictures' dir */
	$dir = dirname(__FILE__);


	/* [2] Listing all pictures recursivly
	=========================================================*/
	function getImages($directory){

		/* (1) We get the direct content of the dir */
		$files   = scandir($directory);
		$fetched = [];

		// if error
		if( !is_array($files) ) return [];


		/* (2) For each element in directory  */
		foreach( $files as $e=>$fname ){

			// {0} Avoid . and .. //
			if( in_array($fname, ['.', '..']) )
				continue;


			$element = "$directory/$fname";

			// {1} If subdir (excepted . and ..)-> applying recursivly //
			if( is_dir($element) )
				$fetched[$fname] = getImages($element);

			// {2} If not picture -> unset //
			else if( preg_match("/\.(jpg|jpeg|png)$/", $fname) )
				$fetched[] = $fname;

		}

		/* (3) Returning result */
		return $fetched;

	}

	// TRANSFORME UN ARBRE EN LISTE
	function toFlaggedImage($folder, $name){
		$flagged = [];

		foreach($folder as $e=>$element)
			if( !is_array($element) )
				$flagged[] = substr("$name/$element", 1);
			else
				$flagged = array_merge($flagged, toFlaggedImage($element, "$name/$e") );

		return $flagged;
	}

	/* [2] On affiche le résultat
	=========================================================*/
	$fetched = toFlaggedImage( getImages( $dir ) );


	header('Content-Type: application/json');
	echo json_encode( $fetched );