From 7ebbd9ec828cfe79497cc1107e580b1e07660132 Mon Sep 17 00:00:00 2001
From: casca <8927157+casca@users.noreply.github.com>
Date: Tue, 16 Jun 2020 19:57:01 +0200
Subject: [PATCH] Zero-pad the number in lecture files and chapter folders

---
 assets/js/app.js | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/assets/js/app.js b/assets/js/app.js
index efcfe4d0..bd70c3c8 100644
--- a/assets/js/app.js
+++ b/assets/js/app.js
@@ -627,7 +627,8 @@ function initDownload($course, coursedata, subtitle = false) {
   function downloadChapter(chapterindex, lectureindex) {
     var num_lectures = coursedata["chapters"][chapterindex]["lectures"].length;
     var chapter_name = sanitize(
-      chapterindex + 1 + ". " + coursedata["chapters"][chapterindex]["name"]
+      zeroPad(chapterindex + 1, coursedata["chapters"].length) +
+        ". " + coursedata["chapters"][chapterindex]["name"]
     );
     mkdirp(
       download_directory + "/" + course_name + "/" + chapter_name,
@@ -776,8 +777,8 @@ function initDownload($course, coursedata, subtitle = false) {
             chapter_name +
             "/" +
             sanitize(
-              lectureindex +
-                1 +
+              zeroPad(lectureindex + 1,
+                coursedata["chapters"][chapterindex]["lectures"].length) +
                 "." +
                 (index + 1) +
                 " " +
@@ -807,8 +808,8 @@ function initDownload($course, coursedata, subtitle = false) {
         );
       } else {
         var lecture_name = sanitize(
-          lectureindex +
-            1 +
+          zeroPad(lectureindex + 1,
+            coursedata["chapters"][chapterindex]["lectures"].length) +
             "." +
             (index + 1) +
             " " +
@@ -974,8 +975,8 @@ function initDownload($course, coursedata, subtitle = false) {
         .addClass(qualityColorMap["Subtitle"] || "grey");
       $download_speed_value.html(0);
       var lecture_name = sanitize(
-        lectureindex +
-          1 +
+        zeroPad(lectureindex + 1,
+          coursedata["chapters"][chapterindex]["lectures"].length) +
           ". " +
           coursedata["chapters"][chapterindex]["lectures"][lectureindex][
             "name"
@@ -1098,8 +1099,8 @@ function initDownload($course, coursedata, subtitle = false) {
           chapter_name +
           "/" +
           sanitize(
-            lectureindex +
-              1 +
+            zeroPad(lectureindex + 1,
+              coursedata["chapters"][chapterindex]["lectures"].length) +
               ". " +
               coursedata["chapters"][chapterindex]["lectures"][lectureindex][
                 "name"
@@ -1133,8 +1134,8 @@ function initDownload($course, coursedata, subtitle = false) {
       );
     } else {
       var lecture_name = sanitize(
-        lectureindex +
-          1 +
+        zeroPad(lectureindex + 1,
+          coursedata["chapters"][chapterindex]["lectures"].length) +
           ". " +
           coursedata["chapters"][chapterindex]["lectures"][lectureindex][
             "name"
@@ -1802,3 +1803,7 @@ function resetToLogin() {
   $(".ui.login.grid").slideDown("fast");
   $(".ui.dashboard").fadeOut("fast");
 }
+
+function zeroPad(num, max) {
+  return num.toString().padStart(Math.floor(Math.log10(max) + 1), '0');
+}
\ No newline at end of file