Improve system import/export

Miss checking presence of zip extension during import

See https://github.com/marienfressinaud/FreshRSS/issues/494

app/Controllers/importExportController.php

@@ -39,7 +39,7 @@ class FreshRSS_importExport_Controller extends Minz_ActionController {
 			// We try to list all files according to their type
 			// A zip file is first opened and then its files are listed
 			$list = array();
-			if ($type_file === 'zip') {
+			if ($type_file === 'zip' && extension_loaded('zip')) {
 				$zip = zip_open($file['tmp_name']);
 
 				while (($zipfile = zip_read($zip)) !== false) {
@@ -56,6 +56,14 @@ class FreshRSS_importExport_Controller extends Minz_ActionController {
 				}
 
 				zip_close($zip);
+			} elseif ($type_file === 'zip') {
+				// Zip extension is not loaded
+				Minz_Session::_param('notification', array(
+					'type' => 'bad',
+					'content' => _t('no_zip_extension')
+				));
+
+				Minz_Request::forward(array('c' => 'importExport'), true);
 			} elseif ($type_file !== 'unknown') {
 				$list_files[$type_file][] = file_get_contents(
 					$file['tmp_name']

app/i18n/en.php

@@ -182,7 +182,9 @@ return array (
 	'focus_search'			=> 'Access search box',
 
 	'file_to_import'		=> 'File to import<br />(OPML, Json or Zip)',
+	'file_to_import_no_zip'		=> 'File to import<br />(OPML or Json)',
 	'import'			=> 'Import',
+	'no_zip_extension'		=> 'Zip extension is not present on your server.',
 	'export'			=> 'Export',
 	'export_opml'			=> 'Export list of feeds (OPML)',
 	'export_starred'		=> 'Export your favourites',

app/i18n/fr.php

@@ -182,7 +182,9 @@ return array (
 	'focus_search'			=> 'Accéder à la recherche',
 
 	'file_to_import'		=> 'Fichier à importer<br />(OPML, Json ou Zip)',
+	'file_to_import_no_zip'		=> 'Fichier à importer<br />(OPML ou Json)',
 	'import'			=> 'Importer',
+	'no_zip_extension'		=> 'L’extension Zip n’est pas présente sur votre serveur.',
 	'export'			=> 'Exporter',
 	'export_opml'			=> 'Exporter la liste des flux (OPML)',
 	'export_starred'		=> 'Exporter les favoris',

app/views/importExport/index.phtml

@@ -6,7 +6,9 @@
 	<form method="post" action="<?php echo _url('importExport', 'import'); ?>" enctype="multipart/form-data">
 		<legend><?php echo _t('import'); ?></legend>
 		<div class="form-group">
-			<label class="group-name" for="file"><?php echo _t('file_to_import'); ?></label>
+			<label class="group-name" for="file">
+				<?php echo extension_loaded('zip') ? _t('file_to_import') : _t('file_to_import_no_zip'); ?>
+			</label>
 			<div class="group-controls">
 				<input type="file" name="file" id="file" />
 			</div>