From edd7aed7b203b7dd324998fa0803ea1fa5de167b Mon Sep 17 00:00:00 2001
From: Tom Moor <tom.moor@gmail.com>
Date: Mon, 12 Sep 2022 23:08:59 +0100
Subject: [PATCH] fix: Line breaks inside of imported HTML image src fail
 import

---
 server/utils/turndown/images.ts | 27 +++++++++++++++++++++++++++
 server/utils/turndown/index.ts  |  2 ++
 2 files changed, 29 insertions(+)
 create mode 100644 server/utils/turndown/images.ts

diff --git a/server/utils/turndown/images.ts b/server/utils/turndown/images.ts
new file mode 100644
index 000000000..2fd4eb027
--- /dev/null
+++ b/server/utils/turndown/images.ts
@@ -0,0 +1,27 @@
+import TurndownService from "turndown";
+
+/**
+ * A turndown plugin overriding inbuilt image parsing behavior
+ *
+ * @param turndownService The TurndownService instance.
+ */
+export default function images(turndownService: TurndownService) {
+  turndownService.addRule("image", {
+    filter: "img",
+
+    replacement(content, node) {
+      // @ts-expect-error getAttribute exists
+      const alt = cleanAttribute(node.getAttribute("alt"));
+      // @ts-expect-error getAttribute exists
+      const src = (node.getAttribute("src") || "").replace(/\n+/g, "");
+      // @ts-expect-error getAttribute exists
+      const title = cleanAttribute(node.getAttribute("title"));
+      const titlePart = title ? ' "' + title + '"' : "";
+      return src ? "![" + alt + "]" + "(" + src + titlePart + ")" : "";
+    },
+  });
+}
+
+function cleanAttribute(attribute: string) {
+  return attribute ? attribute.replace(/(\n+\s*)+/g, "\n") : "";
+}
diff --git a/server/utils/turndown/index.ts b/server/utils/turndown/index.ts
index 1f5b810d5..7b17746af 100644
--- a/server/utils/turndown/index.ts
+++ b/server/utils/turndown/index.ts
@@ -3,6 +3,7 @@ import TurndownService from "turndown";
 import breaks from "./breaks";
 import confluenceCodeBlock from "./confluence-code-block";
 import confluenceTaskList from "./confluence-task-list";
+import images from "./images";
 
 /**
  * Turndown converts HTML to Markdown and is used in the importer code.
@@ -25,6 +26,7 @@ const service = new TurndownService({
   .use(gfm)
   .use(confluenceTaskList)
   .use(confluenceCodeBlock)
+  .use(images)
   .use(breaks);
 
 export default service;