From c53b3babbdeb96277c8ddf2d426552179da87301 Mon Sep 17 00:00:00 2001
From: Uwe Steinmann <steinm@debian.org>
Date: Sun, 9 May 2021 13:41:53 +0200
Subject: [PATCH] add task for creating missing preview images

---
 inc/inc.Tasks.php | 81 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/inc/inc.Tasks.php b/inc/inc.Tasks.php
index 246f5cb8b..591276610 100644
--- a/inc/inc.Tasks.php
+++ b/inc/inc.Tasks.php
@@ -289,6 +289,87 @@ class SeedDMS_CheckSumTask extends SeedDMS_SchedulerTaskBase { /* {{{ */
 	}
 } /* }}} */
 
+/**
+ * Class for processing a single folder
+ *
+ * SeedDMS_Task_Preview_Process_Folder::process() is used as a callable when
+ * iterating over all folders recursively.
+ */
+class SeedDMS_Task_Preview_Process_Folder { /* {{{ */
+	protected $logger;
+
+	protected $previewer;
+
+	protected $widths;
+
+	public function __construct($previewer, $widths, $logger) { /* {{{ */
+		$this->logger = $logger;
+		$this->previewer = $previewer;
+		$this->widths = $widths;
+	} /* }}} */
+
+	public function process($folder) { /* {{{ */
+		$dms = $folder->getDMS();
+		$documents = $folder->getDocuments();
+		if($documents) {
+		foreach($documents as $document) {
+				$versions = $document->getContent();
+				foreach($versions as $version) {
+					foreach($this->widths as $width) {
+						if($this->previewer->createPreview($version, $width)) {
+							$this->logger->log('Task \'preview\': created preview ('.$width.'px) for document '.$document->getId().':'.$version->getVersion(), PEAR_LOG_INFO);
+//							echo "Preview ".$width."px for ".$document->getId().":".$version->getVersion()." created\n";
+						}
+					}
+				}
+			}
+		}
+	} /* }}} */
+} /* }}} */
+
+/**
+ * Class containing methods for running a scheduled task
+ *
+ * @author  Uwe Steinmann <uwe@steinmann.cx>
+ * @package SeedDMS
+ * @subpackage  core
+ */
+class SeedDMS_PreviewTask extends SeedDMS_SchedulerTaskBase { /* {{{ */
+
+	/**
+	 * Run the task
+	 *
+	 * @param $task task to be executed
+	 * @param $dms dms
+	 * @return boolean true if task was executed succesfully, otherwise false
+	 */
+	public function execute($task) {
+		$dms = $this->dms;
+		$logger = $this->logger;
+		$settings = $this->settings;
+		$taskparams = $task->getParameter();
+		$folder = $dms->getRootFolder();
+
+		$previewer = new SeedDMS_Preview_Previewer($settings->_cacheDir);
+
+		$folderprocess = new SeedDMS_Task_Preview_Process_Folder($previewer, array($settings->_previewWidthList, $settings->_previewWidthDetail), $logger);
+		$tree = new SeedDMS_FolderTree($folder, array($folderprocess, 'process'));
+		call_user_func(array($folderprocess, 'process'), $folder);
+
+		return true;
+	}
+
+	public function getDescription() {
+		return 'Check all documents for a missing preview image';
+	}
+
+	public function getAdditionalParams() {
+		return array(
+		);
+	}
+} /* }}} */
+
 $GLOBALS['SEEDDMS_SCHEDULER']['tasks']['core']['expireddocs'] = 'SeedDMS_ExpiredDocumentsTask';
 $GLOBALS['SEEDDMS_SCHEDULER']['tasks']['core']['indexingdocs'] = 'SeedDMS_IndexingDocumentsTask';
 $GLOBALS['SEEDDMS_SCHEDULER']['tasks']['core']['checksum'] = 'SeedDMS_CheckSumTask';
+$GLOBALS['SEEDDMS_SCHEDULER']['tasks']['core']['preview'] = 'SeedDMS_PreviewTask';