fix: correct camera snap mime mapping

src/media/mime.test.ts

@@ -1,7 +1,7 @@
 import JSZip from "jszip";
 import { describe, expect, it } from "vitest";
 
-import { detectMime } from "./mime.js";
+import { detectMime, imageMimeFromFormat } from "./mime.js";
 
 async function makeOoxmlZip(opts: {
   mainMime: string;
@@ -17,6 +17,15 @@ async function makeOoxmlZip(opts: {
 }
 
 describe("mime detection", () => {
+  it("maps common image formats to mime types", () => {
+    expect(imageMimeFromFormat("jpg")).toBe("image/jpeg");
+    expect(imageMimeFromFormat("jpeg")).toBe("image/jpeg");
+    expect(imageMimeFromFormat("png")).toBe("image/png");
+    expect(imageMimeFromFormat("webp")).toBe("image/webp");
+    expect(imageMimeFromFormat("gif")).toBe("image/gif");
+    expect(imageMimeFromFormat("unknown")).toBeUndefined();
+  });
+
   it("detects docx from buffer", async () => {
     const buf = await makeOoxmlZip({
       mainMime:

src/media/mime.ts

@@ -107,6 +107,25 @@ export function extensionForMime(mime?: string | null): string | undefined {
   return EXT_BY_MIME[mime.toLowerCase()];
 }
 
+export function imageMimeFromFormat(
+  format?: string | null,
+): string | undefined {
+  if (!format) return undefined;
+  switch (format.toLowerCase()) {
+    case "jpg":
+    case "jpeg":
+      return "image/jpeg";
+    case "png":
+      return "image/png";
+    case "webp":
+      return "image/webp";
+    case "gif":
+      return "image/gif";
+    default:
+      return undefined;
+  }
+}
+
 export function kindFromMime(mime?: string | null): MediaKind {
   return mediaKindFromMime(mime);
 }