get_beer_files.php

<?php
/* Copyright 2012 BrewPi/Elco Jacobs.
 * This file is part of BrewPi.

 * BrewPi is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * BrewPi is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with BrewPi.  If not, see <http://www.gnu.org/licenses/>.
 */

$beerName = $_POST["beername"];
$fileNames = array();
$currentBeerDir = 'data/' . $beerName;
if(!file_exists($currentBeerDir)){
    echo "directory does not exist";
    return;
}
$handle = opendir($currentBeerDir);
if($handle == false){
    die("Cannot retrieve beer files directory: " . $currentBeerDir);
}
$first = true;
$i=0;
while (false !== ($file = readdir($handle))){  // iterate over all json files in directory
  $extension = strtolower(substr(strrchr($file, '.'), 1));
  if($extension == 'json' ){
    $jsonFile =  $currentBeerDir . '/' . $file;
        $fileNames[$i] = str_replace(".json", "", $jsonFile); // strip extension for sorting
        $i=$i+1;
    }
}
closedir($handle);
if(empty($fileNames)){
    echo "";
}
else{
    sort($fileNames, SORT_NATURAL); // sort files to return them in order from oldest to newest
    array_walk($fileNames, function(&$value) { $value .= '.json'; }); // add .json again
    echo json_encode($fileNames);
}