fix(tpl): enable uploading over 100 files in each directory

On Chrome 77, readEntries() will only return the first 100
FileSystemEntry instances. In order to obtain all of the instances,
readEntries() must be called multiple times.

https://developer.mozilla.org/en-US/docs/Web/API/FileSystemDirectoryReader/readEntries

Author: marjune163

src/tpl/frontend/index.js

@@ -650,6 +650,15 @@
 						}
 					}
 
+					function dirReaderToFiles(dirReader, files, onAllRead) {
+						dirReader.readEntries(function (subEntries) {
+							if (!subEntries.length) return onAllRead();
+							entriesToFiles(subEntries, files, function () {
+								dirReaderToFiles(dirReader, files, onAllRead);
+							});
+						}, onAllRead);
+					}
+
 					entries.forEach(function (entry) {
 						if (entry.isFile) {
 							var relativePath = entry.fullPath;
@@ -664,14 +673,8 @@
 								logError(err);
 							});
 						} else if (entry.isDirectory) {
-							var reader = entry.createReader();
-							reader.readEntries(function (subEntries) {
-								if (subEntries.length) {
-									entriesToFiles(subEntries, files, increaseCb);
-								} else {
-									increaseCb();
-								}
-							});
+							var dirReader = entry.createReader();
+							dirReaderToFiles(dirReader, files, increaseCb);
 						}
 					});
 				}