From d8b747a48d61447b6bed0fc5a0dc077e4e39807f Mon Sep 17 00:00:00 2001
From: MoguCloud <mogucloud@gmail.com>
Date: Sat, 31 Dec 2022 16:55:02 +0800
Subject: [PATCH] Fix FormatFileName
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

修复当文件名以连续的点、空格、点结尾 (例如"abc . . ")时，无法完全去除开头/结尾的点和空格
需要额外处理当文件名都是非法字符的情况
---
 src/DownKyi.Core/Utils/Format.cs | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/DownKyi.Core/Utils/Format.cs b/src/DownKyi.Core/Utils/Format.cs
index 6e0faf1..fcde0f6 100644
--- a/src/DownKyi.Core/Utils/Format.cs
+++ b/src/DownKyi.Core/Utils/Format.cs
@@ -199,7 +199,22 @@ namespace DownKyi.Core.Utils
             destName = Regex.Replace(destName, @"\p{C}+", string.Empty);
 
             // 移除前导和尾部的空白字符、dot符
-            return destName.Trim('.').Trim();
+            int i, j;
+            for (i = 0; i < destName.Length; i++)
+            {
+                if (destName[i] != ' ' && destName[i] != '.')
+                {
+                    break;
+                }
+            }
+            for (j = destName.Length - 1; j >= 0; j--)
+            {
+                if (destName[j] != ' ' && destName[j] != '.')
+                {
+                    break;
+                }
+            }
+            return destName.Substring(i, j - i + 1);
         }
 
     }