snapshot of https://github.com/toeverything/AFFiNE.git (canary, 2026-09-16; blobs > 131072B omitted)

blocksuite/affine/blocks/attachment/src/adapters/markdown.ts

@@ -0,0 +1,83 @@
+import {
+  AttachmentBlockSchema,
+  FootNoteReferenceParamsSchema,
+} from '@blocksuite/affine-model';
+import {
+  BlockMarkdownAdapterExtension,
+  type BlockMarkdownAdapterMatcher,
+  createAttachmentBlockSnapshot,
+  FOOTNOTE_DEFINITION_PREFIX,
+  getFootnoteDefinitionText,
+  isFootnoteDefinitionNode,
+  type MarkdownAST,
+} from '@blocksuite/affine-shared/adapters';
+import { nanoid } from '@blocksuite/store';
+
+const isAttachmentFootnoteDefinitionNode = (node: MarkdownAST) => {
+  if (!isFootnoteDefinitionNode(node)) return false;
+  const footnoteDefinition = getFootnoteDefinitionText(node);
+  try {
+    const footnoteDefinitionJson = FootNoteReferenceParamsSchema.parse(
+      JSON.parse(footnoteDefinition)
+    );
+    return (
+      footnoteDefinitionJson.type === 'attachment' &&
+      !!footnoteDefinitionJson.blobId
+    );
+  } catch {
+    return false;
+  }
+};
+
+export const attachmentBlockMarkdownAdapterMatcher: BlockMarkdownAdapterMatcher =
+  {
+    flavour: AttachmentBlockSchema.model.flavour,
+    toMatch: o => isAttachmentFootnoteDefinitionNode(o.node),
+    fromMatch: o => o.node.flavour === AttachmentBlockSchema.model.flavour,
+    toBlockSnapshot: {
+      enter: (o, context) => {
+        if (!isFootnoteDefinitionNode(o.node)) {
+          return;
+        }
+
+        const { walkerContext, configs } = context;
+        const footnoteIdentifier = o.node.identifier;
+        const footnoteDefinitionKey = `${FOOTNOTE_DEFINITION_PREFIX}${footnoteIdentifier}`;
+        const footnoteDefinition = configs.get(footnoteDefinitionKey);
+        if (!footnoteDefinition) {
+          return;
+        }
+        try {
+          const footnoteDefinitionJson = FootNoteReferenceParamsSchema.parse(
+            JSON.parse(footnoteDefinition)
+          );
+          const { blobId, fileName } = footnoteDefinitionJson;
+          if (!blobId || !fileName) {
+            return;
+          }
+          walkerContext
+            .openNode(
+              createAttachmentBlockSnapshot({
+                id: nanoid(),
+                props: {
+                  name: fileName,
+                  sourceId: blobId,
+                  footnoteIdentifier,
+                  style: 'citation',
+                },
+              }),
+              'children'
+            )
+            .closeNode();
+          walkerContext.skipAllChildren();
+        } catch (err) {
+          console.warn('Failed to parse attachment footnote definition:', err);
+          return;
+        }
+      },
+    },
+    fromBlockSnapshot: {},
+  };
+
+export const AttachmentBlockMarkdownAdapterExtension =
+  BlockMarkdownAdapterExtension(attachmentBlockMarkdownAdapterMatcher);