feat: 기능 추가 과정중

recipes/frontend-capabilities/fake-adapters.ts

@@ -20,7 +20,7 @@ import type {
   ServiceWorkerUpdatePort,
   VersionedOfflineRepository,
   WorkerTaskPort,
-} from "./contracts.js";
+} from "./contracts.ts";
 
 export function success<T>(value: T): CapabilityResult<T> {
   return Object.freeze({ ok: true, value });
@@ -221,11 +221,35 @@ export class FakeFileTransferAdapter implements FileTransferPort {
     ) {
       return failure("LIMIT_EXCEEDED", false, "File size or type is not allowed.");
     }
-    input.onProgress({
-      transferredBytes: input.file.size,
-      totalBytes: input.file.size,
-    });
-    return success({ resourceId: `fake:${input.file.name}` });
+    let transferredBytes = 0;
+    for await (const chunk of input.file.content.chunks) {
+      const duringTransfer = aborted(input.signal);
+      if (duringTransfer) return duringTransfer;
+      transferredBytes += chunk.byteLength;
+      if (transferredBytes > input.file.size) {
+        return failure(
+          "INTEGRITY_FAILED",
+          false,
+          "Uploaded bytes exceeded the declared file size.",
+        );
+      }
+      input.onProgress({
+        phase: "TRANSFERRING",
+        transferredBytes,
+        totalBytes: input.file.size,
+      });
+    }
+    if (
+      transferredBytes !== input.file.size ||
+      input.file.content.byteLength !== input.file.size
+    ) {
+      return failure(
+        "INTEGRITY_FAILED",
+        false,
+        "Uploaded bytes did not match the declared file size.",
+      );
+    }
+    return success({ resourceId: "fake:opaque-resource" });
   }
 
   async download(input: Parameters<FileTransferPort["download"]>[0]) {
@@ -235,11 +259,23 @@ export class FakeFileTransferAdapter implements FileTransferPort {
       return failure("EXPIRED_RESOURCE", true, "The download link expired.");
     }
     const bytes = new TextEncoder().encode(input.resourceId);
-    input.onProgress({
-      transferredBytes: bytes.byteLength,
-      totalBytes: bytes.byteLength,
+    const chunks = async function* () {
+      if (input.signal.aborted) return;
+      input.onProgress({
+        phase: "TRANSFERRING" as const,
+        transferredBytes: bytes.byteLength,
+        totalBytes: bytes.byteLength,
+      });
+      yield bytes.slice();
+    };
+    return success({
+      fileName: "download.bin",
+      mediaType: "application/octet-stream",
+      content: {
+        byteLength: bytes.byteLength,
+        chunks: chunks(),
+      },
     });
-    return success(bytes);
   }
 }