From 574d7300bdf9cda748079d41b466c431b3d7e4c0 Mon Sep 17 00:00:00 2001
From: frankdelange <github-f@unternet.org>
Date: Sat, 14 Jan 2017 10:23:44 +0100
Subject: [PATCH] files_opds: add FictionBook 2 (.fb2) preview provider

---
 files_opds/admin.php          |  1 +
 files_opds/ajax/admin.php     |  2 ++
 files_opds/appinfo/app.php    |  3 +-
 files_opds/js/admin.js        |  3 ++
 files_opds/lib/fb2preview.php | 52 +++++++++++++++++++++++++++++++++++
 5 files changed, 60 insertions(+), 1 deletion(-)
 create mode 100644 files_opds/lib/fb2preview.php

diff --git a/files_opds/admin.php b/files_opds/admin.php
index 9470298..ee90598 100644
--- a/files_opds/admin.php
+++ b/files_opds/admin.php
@@ -18,6 +18,7 @@ $defaults = new \OC_Defaults();
 
 $formats = array(
 	["epub" => Config::getPreview('OC\Preview\Epub') ? 1 : 0 ],
+	["fb2" => Config::getPreview('OC\Preview\FB2') ? 1 : 0 ],
 	["pdf" => Config::getPreview('OC\Preview\PDF') ? 1 : 0],
 	["opendocument" => Config::getPreview('OC\Preview\OpenDocument') ? 1 : 0],
 	["msoffice" => Config::getPreview('OC\Preview\MSOfficeDoc') ? 1 : 0]
diff --git a/files_opds/ajax/admin.php b/files_opds/ajax/admin.php
index 50a7db0..75f99d7 100644
--- a/files_opds/ajax/admin.php
+++ b/files_opds/ajax/admin.php
@@ -38,11 +38,13 @@ if (isset($_POST['opdsCoverX'])) {
 } else {
 	// set preview preferences
 	$opdsPreviewEpub = $_POST['opdsPreviewEpub'];
+	$opdsPreviewFb2 = $_POST['opdsPreviewFb2'];
 	$opdsPreviewPdf = $_POST['opdsPreviewPdf'];
 	$opdsPreviewOpenDocument = $_POST['opdsPreviewOpenDocument'];
 	$opdsPreviewMsOffice = $_POST['opdsPreviewMsOffice'];
 
 	Config::setPreview('OC\Preview\Epub',$opdsPreviewEpub);
+	Config::setPreview('OC\Preview\FB2',$opdsPreviewFb2);
 	Config::setPreview('OC\Preview\PDF',$opdsPreviewPdf);
 	Config::setPreview('OC\Preview\OpenDocument',$opdsPreviewOpenDocument);
 	Config::setPreview('OC\Preview\StarOffice',$opdsPreviewOpenDocument);
diff --git a/files_opds/appinfo/app.php b/files_opds/appinfo/app.php
index 1960e6f..9bf8dfa 100644
--- a/files_opds/appinfo/app.php
+++ b/files_opds/appinfo/app.php
@@ -4,5 +4,6 @@ $l = \OC::$server->getL10N('files_opds');
 \OCP\App::registerPersonal('files_opds', 'personal');
 \OCP\App::registerAdmin('files_opds', 'admin');
 
-/* register preview provider */
+/* register preview providers */
 \OC::$server->getPreviewManager()->registerProvider('/application\/epub\+zip/', function() { return new OCA\Files_Opds\EpubPreview; });
+\OC::$server->getPreviewManager()->registerProvider('/application\/x-fictionbook\+xml/', function() { return new OCA\Files_Opds\Fb2Preview; });
diff --git a/files_opds/js/admin.js b/files_opds/js/admin.js
index 4b1ecc8..cb29337 100644
--- a/files_opds/js/admin.js
+++ b/files_opds/js/admin.js
@@ -3,11 +3,13 @@ $(document).ready(function(){
         var opdsAdminSettings = {
                 save : function() {
 			var epub = document.getElementById('opds-preview-epub').checked ? 'true' : 'false';
+			var fb2 = document.getElementById('opds-preview-fb2').checked ? 'true' : 'false';
 			var pdf = document.getElementById('opds-preview-pdf').checked ? 'true' : 'false';
 			var opendocument = document.getElementById('opds-preview-opendocument').checked ? 'true' : 'false';
 			var msoffice = document.getElementById('opds-preview-msoffice').checked ? 'true' : 'false';
                         var data = {
                                 opdsPreviewEpub : epub,
+                                opdsPreviewFb2 : fb2,
                                 opdsPreviewPdf : pdf,
                                 opdsPreviewOpenDocument : opendocument,
                                 opdsPreviewMsOffice : msoffice
@@ -40,6 +42,7 @@ $(document).ready(function(){
         };
 
         $('#opds-preview-epub').on("change", opdsAdminSettings.save);
+        $('#opds-preview-fb2').on("change", opdsAdminSettings.save);
         $('#opds-preview-pdf').on("change", opdsAdminSettings.save);
         $('#opds-preview-opendocument').on("change", opdsAdminSettings.save);
         $('#opds-preview-msoffice').on("change", opdsAdminSettings.save);
diff --git a/files_opds/lib/fb2preview.php b/files_opds/lib/fb2preview.php
new file mode 100644
index 0000000..3dfcd26
--- /dev/null
+++ b/files_opds/lib/fb2preview.php
@@ -0,0 +1,52 @@
+<?php
+
+/**
+ * Nextcloud - Files_Opds App
+ *
+ * @author Frank de Lange
+ * @copyright 2016 Frank de Lange
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ */
+
+namespace OCA\Files_Opds;
+
+use OCP\Preview\IProvider;
+
+/**
+ * FB2 preview - returns cover or null
+ */
+class Fb2Preview implements IProvider {
+
+        public function getMimeType() {
+                return '/application\/x-fictionbook\+xml/';
+        }
+
+	public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
+                //get fileinfo
+                $fileInfo = $fileview->getFileInfo($path);
+                if(!$fileInfo) {
+                        return false;
+                }
+
+                $absPath = $fileview->toTmpFile($path);
+
+		$fb2 = new \OCA\Files_Opds\FB2($absPath);
+
+		$cover = $fb2->Cover();
+
+		if ($cover) {
+			$image = new \OC_Image();
+
+			$image->loadFromData($cover['data']);
+		}
+
+		return (($cover !== null) && $image->valid()) ? $image : false;
+        }
+
+	public function isAvailable(\OCP\Files\FileInfo $file) {
+		return $file->getSize() > 0;
+	}
+}
+