From 4098346fb7dd60affdc9675dbd39780384da738b Mon Sep 17 00:00:00 2001
From: matevip <matevip@mate.vip>
Date: Tue, 12 May 2026 11:25:32 +0800
Subject: [PATCH] fix(wiki): strip file extensions when deriving transformation
 page slugs

---
 .../service/WikiTransformationExecutor.java    | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/mateclaw-server/src/main/java/vip/mate/wiki/service/WikiTransformationExecutor.java b/mateclaw-server/src/main/java/vip/mate/wiki/service/WikiTransformationExecutor.java
index 1ae7dff0..b2ac3f4f 100644
--- a/mateclaw-server/src/main/java/vip/mate/wiki/service/WikiTransformationExecutor.java
+++ b/mateclaw-server/src/main/java/vip/mate/wiki/service/WikiTransformationExecutor.java
@@ -292,12 +292,28 @@ public class WikiTransformationExecutor {
         return persisted;
     }
 
+    /**
+     * Common document / image extensions that we don't want leaking into the
+     * slug. The pattern matches a trailing dotted extension and is case-
+     * insensitive so both {@code foo.PDF} and {@code foo.pdf} are stripped.
+     */
+    private static final java.util.regex.Pattern FILE_EXT_PATTERN =
+            java.util.regex.Pattern.compile(
+                    "\\.(pdf|docx?|pptx?|xlsx?|csv|tsv|txt|md|markdown|rtf|odt|epub|html?|json|xml|yaml|yml|jpe?g|png|gif|bmp|tiff?|webp|svg|mp3|wav|mp4|mov|webm)$",
+                    java.util.regex.Pattern.CASE_INSENSITIVE);
+
     private static String buildSlug(WikiTransformationEntity template, WikiRawMaterialEntity raw) {
-        String rawPart = WikiPageService.toSlug(raw.getTitle());
+        String trimmedTitle = stripFileExtension(raw.getTitle());
+        String rawPart = WikiPageService.toSlug(trimmedTitle);
         if (rawPart == null || rawPart.isBlank()) rawPart = "r" + raw.getId();
         return template.getName() + "-" + rawPart;
     }
 
+    private static String stripFileExtension(String title) {
+        if (title == null) return null;
+        return FILE_EXT_PATTERN.matcher(title.trim()).replaceFirst("");
+    }
+
     /** First non-empty line of the output, capped to ~280 chars, used as page summary. */
     private static String deriveSummary(String output) {
         if (output == null) return "";