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<?php
/**
* PHP EPub Meta - App request handler
*
* @author Andreas Gohr <andi@splitbrain.org>
* @author Sébastien Lucas <sebastien@slucas.fr>
* @author Simon Schrape <simon@epubli.com> © 2015
* @author mikespub
*/
namespace SebLucas\EPubMeta\App;
use SebLucas\EPubMeta\EPub;
use SebLucas\EPubMeta\Tools\ZipEdit;
use Exception;
class Handler
{
protected string $bookdir;
protected string $rootdir;
protected ?EPub $epub;
protected ?string $error;
public function __construct(string $bookdir)
{
$this->bookdir = $bookdir;
$this->rootdir = dirname(__DIR__, 2);
}
/**
* Handle request
* @param mixed $request @todo
* @return void
*/
public function handle($request = null)
{
// proxy google requests
if (isset($_GET['api'])) {
header('application/json; charset=UTF-8');
echo $this->searchBookApi($_GET['api']);
return;
}
if (!empty($_REQUEST['book'])) {
try {
$book = preg_replace('/[^\w ._-]+/', '', $_REQUEST['book']);
$book = basename($book . '.epub'); // no upper dirs, lowers might be supported later
$this->epub = new EPub($this->bookdir . $book, ZipEdit::class);
} catch (Exception $e) {
$this->error = $e->getMessage();
}
}
// return image data
if (!empty($_REQUEST['img']) && isset($this->epub)) {
$img = $this->epub->getCoverInfo();
header('Content-Type: ' . $img['mime']);
echo $img['data'];
return;
}
// save epub data
if (isset($_REQUEST['save']) && isset($this->epub)) {
$this->epub = $this->saveEpubData($this->epub);
if (!$this->error) {
// rename
$new = $this->renameEpubFile($this->epub);
$go = basename($new, '.epub');
header('Location: ?book=' . rawurlencode($go));
return;
}
}
$data = [];
$data['bookdir'] = htmlspecialchars($this->bookdir);
$data['booklist'] = '';
$list = glob($this->bookdir . '/*.epub');
foreach ($list as $book) {
$base = basename($book, '.epub');
$name = Util::book_output($base);
$data['booklist'] .= '<li ' . ($base == $_REQUEST['book'] ? 'class="active"' : '') . '>';
$data['booklist'] .= '<a href="?book=' . htmlspecialchars($base) . '">' . $name . '</a>';
$data['booklist'] .= '</li>';
}
if (isset($this->error)) {
$data['alert'] = "alert('" . htmlspecialchars($this->error) . "');";
}
if (empty($this->epub)) {
$data['license'] = str_replace("\n\n", '</p><p>', htmlspecialchars(file_get_contents($this->rootdir . '/LICENSE')));
$template = $this->rootdir . '/templates/index.html';
} else {
$data = $this->getEpubData($this->epub, $data);
$template = $this->rootdir . '/templates/epub.html';
}
header('Content-Type: text/html; charset=utf-8');
echo $this->renderTemplate($template, $data);
}
/**
* Proxy google requests
* @param string $query
* @return string|false
*/
protected function searchBookApi($query)
{
return file_get_contents('https://www.googleapis.com/books/v1/volumes?q=' . rawurlencode($query) . '&maxResults=25&printType=books&projection=full');
}
/**
* Get Epub data
* @param EPub $epub
* @param array<string, string> $data
* @return array<string, string>
*/
protected function getEpubData($epub, $data = [])
{
$data['book'] = htmlspecialchars($_REQUEST['book']);
$data['title'] = htmlspecialchars($epub->getTitle());
$data['authors'] = '';
$count = 0;
foreach ($epub->getAuthors() as $as => $name) {
$data['authors'] .= '<p>';
$data['authors'] .= '<input type="text" name="authorname[' . $count . ']" value="' . htmlspecialchars($name) . '" />';
$data['authors'] .= ' (<input type="text" name="authoras[' . $count . ']" value="' . htmlspecialchars($as) . '" />)';
$data['authors'] .= '</p>';
$count++;
}
$data['cover'] = '?book=' . htmlspecialchars($_REQUEST['book']) . '&img=1';
$c = $epub->getCoverInfo();
$data['imgclass'] = $c['found'] ? 'hasimg' : 'noimg';
$data['description'] = htmlspecialchars($epub->getDescription());
$data['subjects'] = htmlspecialchars(join(', ', $epub->getSubjects()));
$data['publisher'] = htmlspecialchars($epub->getPublisher());
$data['copyright'] = htmlspecialchars($epub->getCopyright());
$data['language'] = htmlspecialchars($epub->getLanguage());
$data['isbn'] = htmlspecialchars($epub->getISBN());
return $data;
}
/**
* Save Epub data
* @param EPub $epub
* @return EPub
*/
protected function saveEpubData($epub)
{
$epub->setTitle($_POST['title']);
$epub->setDescription($_POST['description']);
$epub->setLanguage($_POST['language']);
$epub->setPublisher($_POST['publisher']);
$epub->setCopyright($_POST['copyright']);
$epub->setIsbn($_POST['isbn']);
$epub->setSubjects($_POST['subjects']);
$authors = [];
foreach ((array) $_POST['authorname'] as $num => $name) {
if ($name) {
$as = $_POST['authoras'][$num];
if (!$as) {
$as = $name;
}
$authors[$as] = $name;
}
}
$epub->setAuthors($authors);
// handle image
$cover = '';
if (preg_match('/^https?:\/\//i', $_POST['coverurl'])) {
$data = @file_get_contents($_POST['coverurl']);
if ($data) {
$cover = tempnam(sys_get_temp_dir(), 'epubcover');
file_put_contents($cover, $data);
unset($data);
}
} elseif(is_uploaded_file($_FILES['coverfile']['tmp_name'])) {
$cover = $_FILES['coverfile']['tmp_name'];
}
if ($cover) {
$info = @getimagesize($cover);
if (preg_match('/^image\/(gif|jpe?g|png)$/', $info['mime'])) {
$epub->setCoverInfo($cover, $info['mime']);
} else {
$this->error = 'Not a valid image file' . $cover;
}
}
// save the ebook
try {
$epub->save();
} catch (Exception $e) {
$this->error = $e->getMessage();
}
// clean up temporary cover file
if ($cover) {
@unlink($cover);
}
return $epub;
}
/**
* Rename Epub file
* @param EPub $epub
* @return string
*/
protected function renameEpubFile($epub)
{
$author = array_keys($epub->getAuthors())[0];
$title = $epub->getTitle();
$new = Util::to_file($author . '-' . $title);
$new = $this->bookdir . $new . '.epub';
$old = $epub->file();
if (realpath($new) != realpath($old)) {
if (!@rename($old, $new)) {
$new = $old; //rename failed, stay here
}
}
return $new;
}
/**
* Render template with data
* @param string $template
* @param array<string, string> $data
* @return string
*/
protected function renderTemplate($template, $data)
{
if (!file_exists($template)) {
throw new Exception('Invalid template ' . htmlspecialchars($template));
}
$content = file_get_contents($template);
foreach ($data as $name => $value) {
$content = preg_replace('/{{\s*' . $name . '\s*}}/', $value, $content);
}
return $content;
}
}
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