Save

src/functions/stringify/index.ts

@@ -0,0 +1,22 @@
+import { Transform } from "stream";
+import { JsonValue, JsonParseOptions } from "../definitions";
+
+/**
+ * Return a ReadWrite stream that stringifies the streamed chunks to JSON
+ */
+export function stringify(
+    options: JsonParseOptions = { pretty: false },
+): NodeJS.ReadWriteStream {
+    return new Transform({
+        readableObjectMode: true,
+        writableObjectMode: true,
+        transform(chunk: JsonValue, encoding, callback) {
+            callback(
+                undefined,
+                options.pretty
+                    ? JSON.stringify(chunk, null, 2)
+                    : JSON.stringify(chunk),
+            );
+        },
+    });
+}