Move CLI to apps/cli

apps/cli/src/commands/download.command.ts

@@ -0,0 +1,43 @@
+import * as fet from "node-fetch";
+
+import { CryptoService } from "jslib-common/abstractions/crypto.service";
+import { SymmetricCryptoKey } from "jslib-common/models/domain/symmetricCryptoKey";
+import { Response } from "jslib-node/cli/models/response";
+import { FileResponse } from "jslib-node/cli/models/response/fileResponse";
+
+import { CliUtils } from "../utils";
+
+export abstract class DownloadCommand {
+  constructor(protected cryptoService: CryptoService) {}
+
+  protected async saveAttachmentToFile(
+    url: string,
+    key: SymmetricCryptoKey,
+    fileName: string,
+    output?: string
+  ) {
+    const response = await fet.default(new fet.Request(url, { headers: { cache: "no-cache" } }));
+    if (response.status !== 200) {
+      return Response.error(
+        "A " + response.status + " error occurred while downloading the attachment."
+      );
+    }
+
+    try {
+      const buf = await response.arrayBuffer();
+      const decBuf = await this.cryptoService.decryptFromBytes(buf, key);
+      if (process.env.BW_SERVE === "true") {
+        const res = new FileResponse(Buffer.from(decBuf), fileName);
+        return Response.success(res);
+      } else {
+        return await CliUtils.saveResultToFile(Buffer.from(decBuf), output, fileName);
+      }
+    } catch (e) {
+      if (typeof e === "string") {
+        return Response.error(e);
+      } else {
+        return Response.error("An error occurred while saving the attachment.");
+      }
+    }
+  }
+}