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main/document/document_slideshow.inc.php

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+<?php
+/* For licensing terms, see /license.txt */
+
+/**
+ * This is a plugin for the documents tool. It looks for .jpg, .jpeg, .gif, .png
+ * files (since these are the files that can be viewed in a browser) and creates
+ * a slideshow with it by allowing to go to the next/previous image.
+ * You can also have a quick overview (thumbnail view) of all the images in
+ * that particular folder.
+ *
+ * Each slideshow is folder based. Only
+ * the images of the chosen folder are shown.
+ *
+ * This file has two large sections.
+ * 1. code that belongs in document.php, but to avoid clutter I put the code here
+ * (not present) 2. the function resize_image that handles the image resizing
+ *
+ * @author Patrick Cool, responsible author
+ * @author Roan Embrechts, minor cleanup
+ *
+ * @package chamilo.document
+ */
+/**
+ * General code that belongs in document.php.
+ *
+ * This code should indeed go in documents.php but since document.php is already a really ugly file with
+ * too much things in one file , I decided to put the code for document.php here and to include this
+ * file into document.php
+ */
+
+// We check if there are images in this folder by searching the extensions for .jpg, .gif, .png
+// grabbing the list of all the documents of this folder
+$array_to_search = !empty($documentAndFolders) && is_array($documentAndFolders) ? $documentAndFolders : [];
+
+if (count($array_to_search) > 0) {
+    foreach ($array_to_search as $file) {
+        $all_files[] = basename($file['path']);
+    }
+}
+
+// Always show gallery.
+$image_present = 1;
+/*
+if (isset($all_files) && is_array($all_files) && count($all_files) > 0) {
+    foreach ($all_files as & $file) {
+        $slideshow_extension = strrchr($file, '.');
+        $slideshow_extension = strtolower($slideshow_extension);
+        if (in_array($slideshow_extension, $accepted_extensions)) {
+            $image_present = 1;
+            break;
+        }
+    }
+}*/
+
+$tablename_column = isset($_GET['tablename_column']) ? Security::remove_XSS($_GET['tablename_column']) : 0;
+if ($tablename_column == 0) {
+    $tablename_column = 1;
+} else {
+    $tablename_column = intval($tablename_column) - 1;
+}
+
+$image_files_only = sort_files($array_to_search);
+
+function sort_files($table)
+{
+    $tablename_direction = isset($_GET['tablename_direction']) ? Security::remove_XSS($_GET['tablename_direction']) : 'ASC';
+    $accepted_extensions = ['.jpg', '.jpeg', '.gif', '.png', '.bmp', '.svg'];
+    $temp = [];
+
+    foreach ($table as &$file_array) {
+        if ($file_array['filetype'] == 'file') {
+            $slideshow_extension = strrchr($file_array['path'], '.');
+            $slideshow_extension = strtolower($slideshow_extension);
+            if (in_array($slideshow_extension, $accepted_extensions)) {
+                $start_date = isset($file_array['insert_date']) ? $file_array['insert_date'] : null;
+                $temp[] = ['file', basename($file_array['path']), $file_array['size'], $start_date];
+            }
+        }
+    }
+
+    if ($tablename_direction == 'DESC') {
+        usort($temp, 'rsort_table');
+    } else {
+        usort($temp, 'sort_table');
+    }
+
+    $final_array = [];
+    foreach ($temp as &$file_array) {
+        $final_array[] = $file_array[1];
+    }
+
+    return $final_array;
+}
+
+function sort_table($a, $b)
+{
+    global $tablename_column;
+
+    return strnatcmp($a[$tablename_column], $b[$tablename_column]);
+}
+
+function rsort_table($a, $b)
+{
+    global $tablename_column;
+
+    return strnatcmp($b[$tablename_column], $a[$tablename_column]);
+}