feat(nbstore): add cloud implementation (#8810)

packages/common/nbstore/src/impls/cloud/blob.ts

@@ -0,0 +1,72 @@
+import {
+  deleteBlobMutation,
+  gqlFetcherFactory,
+  listBlobsQuery,
+  releaseDeletedBlobsMutation,
+  setBlobMutation,
+} from '@affine/graphql';
+
+import { DummyConnection } from '../../connection';
+import { type BlobRecord, BlobStorage } from '../../storage';
+
+export class CloudBlobStorage extends BlobStorage {
+  private readonly gql = gqlFetcherFactory(this.options.peer + '/graphql');
+  override connection = new DummyConnection();
+
+  override async get(key: string) {
+    const res = await fetch(
+      this.options.peer + '/api/workspaces/' + this.spaceId + '/blobs/' + key,
+      { cache: 'default' }
+    );
+
+    if (!res.ok) {
+      return null;
+    }
+
+    const data = await res.arrayBuffer();
+
+    return {
+      key,
+      data: new Uint8Array(data),
+      mime: res.headers.get('content-type') || '',
+      size: data.byteLength,
+      createdAt: new Date(res.headers.get('last-modified') || Date.now()),
+    };
+  }
+
+  override async set(blob: BlobRecord) {
+    await this.gql({
+      query: setBlobMutation,
+      variables: {
+        workspaceId: this.spaceId,
+        blob: new File([blob.data], blob.key, { type: blob.mime }),
+      },
+    });
+  }
+
+  override async delete(key: string, permanently: boolean) {
+    await this.gql({
+      query: deleteBlobMutation,
+      variables: { workspaceId: this.spaceId, key, permanently },
+    });
+  }
+
+  override async release() {
+    await this.gql({
+      query: releaseDeletedBlobsMutation,
+      variables: { workspaceId: this.spaceId },
+    });
+  }
+
+  override async list() {
+    const res = await this.gql({
+      query: listBlobsQuery,
+      variables: { workspaceId: this.spaceId },
+    });
+
+    return res.workspace.blobs.map(blob => ({
+      ...blob,
+      createdAt: new Date(blob.createdAt),
+    }));
+  }
+}