feat: blob images

lexicons/space/litenote/note.json

@@ -1,14 +1,14 @@
 {
+  "lexicon": 1,
+  "id": "space.litenote.note",
   "defs": {
     "main": {
+      "type": "record",
       "description": "A markdown blog post with LaTeX, GitHub notes, Mermaid, YouTube and Bluesky extensions.",
       "key": "tid",
       "record": {
         "type": "object",
-        "required": [
+        "required": ["title", "content"],
-          "title",
-          "content"
-        ],
         "properties": {
           "title": {
             "type": "string",
@@ -16,9 +16,15 @@
           },
           "content": {
             "type": "string",
-            "description": "Markdown content of the blog post",
+            "description": "Markdown content. Local image paths are replaced with blob CIDs at publish time.",
             "maxLength": 10000
           },
+          "images": {
+            "type": "array",
+            "description": "Blob references for images embedded in the markdown content.",
+            "items": { "type": "ref", "ref": "#image" },
+            "maxLength": 20
+          },
           "publishedAt": {
             "type": "string",
             "format": "datetime"
@@ -28,10 +34,24 @@
             "format": "datetime"
           }
         }
-      },
+      }
-      "type": "record"
+    },
+    "image": {
+      "type": "object",
+      "descriptions": "Images from the markdown content, separately uploaded and link in markdown content with blob CID.",
+      "required": ["image"],
+      "properties": {
+        "image": {
+          "type": "blob",
+          "accept": ["image/*"],
+          "maxSize": 2000000
+        },
+        "alt": {
+          "type": "string",
+          "maxLength": 2000,
+          "description": "Alt text for the image."
+        }
+      }
     }
-  },
+  }
-  "id": "space.litenote.note",
-  "lexicon": 1
 }

publish.test.ts

@@ -0,0 +1,85 @@
+import { test, expect, describe } from "bun:test";
+import { stripUnpublishedLinks, extractLocalImages } from "./publish";
+
+describe("stripUnpublishedLinks", () => {
+  const isUnpublished = (href: string) =>
+    !href.startsWith("http://") && !href.startsWith("https://");
+
+  test("strips links to unpublished notes", () => {
+    const md = "Check out [my draft](draft-note) for details.";
+    expect(stripUnpublishedLinks(md, isUnpublished)).toBe(
+      "Check out my draft for details.",
+    );
+  });
+
+  test("keeps links to published URLs", () => {
+    const md = "Visit [Google](https://google.com) today.";
+    expect(stripUnpublishedLinks(md, isUnpublished)).toBe(md);
+  });
+
+  test("strips multiple unpublished links", () => {
+    const md = "See [note A](note-a) and [note B](note-b).";
+    expect(stripUnpublishedLinks(md, isUnpublished)).toBe(
+      "See note A and note B.",
+    );
+  });
+
+  test("handles mixed links", () => {
+    const md =
+      "Read [docs](https://docs.example.com) and [my note](local-note).";
+    expect(stripUnpublishedLinks(md, isUnpublished)).toBe(
+      "Read [docs](https://docs.example.com) and my note.",
+    );
+  });
+
+  test("does not strip image references", () => {
+    const md = "![alt text](./images/photo.png)";
+    expect(stripUnpublishedLinks(md, isUnpublished)).toBe(md);
+  });
+
+  test("handles empty link text", () => {
+    const md = "[](unpublished-ref)";
+    expect(stripUnpublishedLinks(md, isUnpublished)).toBe("");
+  });
+});
+
+describe("extractLocalImages", () => {
+  test("extracts local image paths", () => {
+    const md = "![photo](./images/photo.png)";
+    const result = extractLocalImages(md);
+    expect(result).toEqual([
+      { full: "![photo](./images/photo.png)", alt: "photo", path: "./images/photo.png" },
+    ]);
+  });
+
+  test("skips URL images", () => {
+    const md = "![logo](https://example.com/logo.png)";
+    expect(extractLocalImages(md)).toEqual([]);
+  });
+
+  test("extracts multiple local images", () => {
+    const md = `
+![a](./a.png)
+Some text
+![b](../assets/b.jpg)
+![c](https://cdn.example.com/c.webp)
+`;
+    const result = extractLocalImages(md);
+    expect(result).toHaveLength(2);
+    expect(result[0].path).toBe("./a.png");
+    expect(result[1].path).toBe("../assets/b.jpg");
+  });
+
+  test("handles images with empty alt", () => {
+    const md = "![](./no-alt.png)";
+    const result = extractLocalImages(md);
+    expect(result).toEqual([
+      { full: "![](./no-alt.png)", alt: "", path: "./no-alt.png" },
+    ]);
+  });
+
+  test("handles http:// URLs (case insensitive)", () => {
+    const md = "![img](HTTP://example.com/img.png)";
+    expect(extractLocalImages(md)).toEqual([]);
+  });
+});

publish.ts

@@ -0,0 +1,181 @@
+/**
+ * Publish a markdown note as an AT Protocol record.
+ *
+ * - Strips links to unpublished notes (keeps just the link text)
+ * - Uploads local images as blobs and replaces paths with CIDs
+ * - Creates the space.litenote.note record
+ */
+
+import { resolve, dirname } from "path";
+
+interface BlobRef {
+  $type: "blob";
+  ref: { $link: string };
+  mimeType: string;
+  size: number;
+}
+
+interface ImageEntry {
+  image: BlobRef;
+  alt: string;
+}
+
+interface PublishOptions {
+  /** PDS host, e.g. "https://bsky.social" */
+  pdsHost: string;
+  /** Author DID */
+  did: string;
+  /** Auth token for XRPC calls */
+  accessJwt: string;
+  /** Note title */
+  title: string;
+  /** Raw markdown content */
+  content: string;
+  /** Base directory for resolving relative image paths */
+  baseDir: string;
+  /** Predicate that returns true if a link target is an unpublished note */
+  isUnpublishedLink?: (href: string) => boolean;
+}
+
+const MIME_TYPES: Record<string, string> = {
+  ".png": "image/png",
+  ".jpg": "image/jpeg",
+  ".jpeg": "image/jpeg",
+  ".gif": "image/gif",
+  ".webp": "image/webp",
+  ".svg": "image/svg+xml",
+  ".avif": "image/avif",
+};
+
+/**
+ * Strip markdown links where the href points to an unpublished note.
+ * `[text](unpublished-ref)` → `text`
+ */
+export function stripUnpublishedLinks(
+  markdown: string,
+  isUnpublished: (href: string) => boolean,
+): string {
+  // Match [text](href) but not ![alt](src) (images start with !)
+  return markdown.replace(
+    /(?<!!)\[([^\]]*)\]\(([^)]+)\)/g,
+    (match, text, href) => {
+      if (isUnpublished(href)) {
+        return text;
+      }
+      return match;
+    },
+  );
+}
+
+/**
+ * Extract local image references from markdown.
+ * Returns matches for `![alt](path)` where path is not a URL.
+ */
+export function extractLocalImages(
+  markdown: string,
+): Array<{ full: string; alt: string; path: string }> {
+  const results: Array<{ full: string; alt: string; path: string }> = [];
+  const regex = /!\[([^\]]*)\]\(([^)]+)\)/g;
+  let m: RegExpExecArray | null;
+  while ((m = regex.exec(markdown)) !== null) {
+    const [full, alt, path] = m;
+    // Skip URLs
+    if (/^https?:\/\//i.test(path)) continue;
+    results.push({ full, alt, path });
+  }
+  return results;
+}
+
+function getMimeType(filePath: string): string {
+  const ext = filePath.toLowerCase().match(/\.[^.]+$/)?.[0] ?? "";
+  return MIME_TYPES[ext] ?? "application/octet-stream";
+}
+
+async function uploadBlob(
+  pdsHost: string,
+  accessJwt: string,
+  filePath: string,
+): Promise<BlobRef> {
+  const file = Bun.file(filePath);
+  const bytes = await file.arrayBuffer();
+  const mimeType = getMimeType(filePath);
+
+  const res = await fetch(`${pdsHost}/xrpc/com.atproto.repo.uploadBlob`, {
+    method: "POST",
+    headers: {
+      "Content-Type": mimeType,
+      Authorization: `Bearer ${accessJwt}`,
+    },
+    body: bytes,
+  });
+
+  if (!res.ok) {
+    const text = await res.text();
+    throw new Error(`uploadBlob failed (${res.status}): ${text}`);
+  }
+
+  const data = (await res.json()) as { blob: BlobRef };
+  return data.blob;
+}
+
+export async function publish(opts: PublishOptions) {
+  const { pdsHost, did, accessJwt, title, baseDir } = opts;
+  let content = opts.content;
+
+  // 1. Strip links to unpublished notes
+  if (opts.isUnpublishedLink) {
+    content = stripUnpublishedLinks(content, opts.isUnpublishedLink);
+  }
+
+  // 2. Extract & upload local images
+  const localImages = extractLocalImages(content);
+  const images: ImageEntry[] = [];
+
+  for (const img of localImages) {
+    const absPath = resolve(baseDir, img.path);
+    const blob = await uploadBlob(pdsHost, accessJwt, absPath);
+    const cid = blob.ref.$link;
+
+    // Replace the local path with the CID in markdown
+    content = content.replace(img.full, `![${img.alt}](${cid})`);
+
+    images.push({ image: blob, alt: img.alt });
+  }
+
+  // 3. Create the record
+  const now = new Date().toISOString();
+  const record: Record<string, unknown> = {
+    $type: "space.litenote.note",
+    title,
+    content,
+    publishedAt: now,
+    createdAt: now,
+  };
+
+  if (images.length > 0) {
+    record.images = images;
+  }
+
+  const res = await fetch(
+    `${pdsHost}/xrpc/com.atproto.repo.createRecord`,
+    {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+        Authorization: `Bearer ${accessJwt}`,
+      },
+      body: JSON.stringify({
+        repo: did,
+        collection: "space.litenote.note",
+        record,
+      }),
+    },
+  );
+
+  if (!res.ok) {
+    const text = await res.text();
+    throw new Error(`createRecord failed (${res.status}): ${text}`);
+  }
+
+  return (await res.json()) as { uri: string; cid: string };
+}