utf8books.php

<?php
$all = '';
$term_code = '';
$section = '';
if (isset($_SERVER['PATH_INFO'])) {
        $parts = explode('/', $_SERVER['PATH_INFO']);
        if (isset($parts[1])) {
                if ($parts[1] === 'help') {
                        header('Content-Type: text/plain');
                        die(file_get_contents('README.utf8books'));
                }
                        $term_code = substr(strip_tags(str_replace(array("'",'"'," ","/"),'', urldecode($parts[1]))),-3);
  }
  if (isset($parts[2])) {
                if ($parts[2] === 'all') {
                        $all = true;
                } else {
                  $section = strip_tags(str_replace(array("'",'"'," ","/"),'', urldecode($parts[2])));
                }
        }
} else if (isset($_GET['term']) && isset($_GET['section'])) {
  $term_code = substr(strip_tags(str_replace(array("'",'"'," ","/"),'', urldecode($_GET['term']))),-3);
  if ($_GET['section'] == 'all') {
        $all = true;
  } else {
        $section = strip_tags(str_replace(array("'",'"'," ","/"),'', urldecode($_GET['section'])));
  }
} else if (isset($_GET['term'])) {
  $term_code = substr(strip_tags(str_replace(array("'",'"'," ","/"),'', urldecode($_GET['term']))),-3);
}

$callback = '';
if (isset($_GET['callback'])) {
        $callback = strip_tags(str_replace(array("'",'"'," ","/"),'',urldecode($_GET['callback'])));
}

if ($all === true && $term_code != '') {
        $filenames = glob('booklist/' . $term_code . '-*.json');
        $result = '';
        foreach ($filenames as $filename) {
                $books = json_decode(file_get_contents($filename),true);
                for ($i = 0; $i < count($books); $i += 1) {
                        foreach ($books[$i] as $key => $value) {
                                $books[$i][$key] = mb_convert_encoding($value,'UTF-8');
                        }
                }
                if ($result === '') {
                        $result .= json_encode($books);                 
                } else {
                        $result .= ',' . json_encode($books);                   
                }
                unset($books);
        }
        $result .= '';
} else if ($section != '' && $term_code != '') {
        $filename = 'booklist/' . substr($term_code,-3) . '-' . $section . '.json';
        if (file_exists($filename)) {
                $books = json_decode(file_get_contents($filename),true);
                for ($i = 0; $i < count($books); $i += 1) {
                        foreach ($books[$i] as $key => $value) {
                                $books[$i][$key] = mb_convert_encoding($value,'UTF-8');
                        }
                }
                $result = json_encode($books);
        } else {
                $result = '{"error":"' . "Can't find $filename" . '"}';
        }
} else if ($term_code != '') {
        $files = glob("booklist/" . substr($term_code,-3) . "-?????.json");
        $booklists = array();
        foreach ($files as $file) {
                list($term_code, $section) = explode('-', str_replace(array('booklist/','.json'),'',$file));
                $booklists[] = $section;
        }
        $result = json_encode($booklists);
} else {
        $filenames = glob("booklist/???-?????.json");
        $term_codes = array();
        foreach ($filenames as $filename) {
                $term_codes[] = '20'. substr($filename,9,3);
        }       
        $result = json_encode(array_unique($term_codes,SORT_NUMERIC));
}


if ($callback !== "") {
        header('Content-Type: application/javascript');
        echo $callback . '(';
} else {
        header('Content-Type: application/json');
}
echo $result;
if ($callback !== "") {
        echo ')';
}
?>