From 68f35ddc0b77085c40299ab9172dd4be0a19a3d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Th=C3=A9o=20LUDWIG?= <contact@theoludwig.fr>
Date: Fri, 12 Jan 2024 00:10:00 +0100
Subject: [PATCH] fix: empty id fragment should be invalid

---
 src/index.js | 15 ++++++++++++++-
 src/utils.js |  2 +-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/index.js b/src/index.js
index bde6243..1243d00 100644
--- a/src/index.js
+++ b/src/index.js
@@ -63,7 +63,20 @@ const customRule = {
               continue
             }
 
-            if (type === "link_open" && url.hash !== "") {
+            if (type !== "link_open") {
+              continue
+            }
+
+            if (url.hash.length <= 0) {
+              if (hrefSrc.includes("#")) {
+                onError({
+                  lineNumber,
+                  detail: `${detail} should have a valid fragment identifier`,
+                })
+              }
+            }
+
+            if (url.hash.length > 0) {
               const fileContent = fs.readFileSync(url, { encoding: "utf8" })
               const headings = getMarkdownHeadings(fileContent)
               const anchorHTMLFragments =
diff --git a/src/utils.js b/src/utils.js
index 8bbc01b..7ed20a3 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -119,7 +119,7 @@ const getMarkdownIdOrAnchorNameFragments = (content) => {
     }
 
     const anchorIdOrName = anchorMatch[1]
-    if (anchorMatch[1] === undefined) {
+    if (anchorIdOrName === undefined) {
       continue
     }