feat: add JSON support

packages/snippetz/src/undici.test.ts

@@ -51,6 +51,35 @@ const {statusCode, headers, trailers, body} = await request("https://example.com
     "Content-Type": "application/json"
   }
 });
+`)
+  })
+
+  it('has JSON body', () => {
+    const source = undici({
+      url: 'https://example.com',
+      headers: [
+        {
+          name: 'Content-Type',
+          value: 'application/json',
+        },
+      ],
+      postData: {
+        mimeType: 'application/json',
+        text: JSON.stringify({
+          hello: 'world',
+        }),
+      },
+    })
+
+    expect(print(source)).toBe(`import {request} from "undici";
+const {statusCode, headers, trailers, body} = await request("https://example.com", {
+  "headers": {
+    "Content-Type": "application/json"
+  },
+  "body": {
+    "hello": "world"
+  }
+});
 `)
   })
 })

packages/snippetz/src/undici.ts

@@ -34,6 +34,17 @@ export function undici(request: Partial<Request>) {
     }
   })
 
+  // Add body
+  if (normalizedRequest.postData) {
+    // Plain text
+    options.body = normalizedRequest.postData.text
+
+    // JSON
+    if (normalizedRequest.postData.mimeType === 'application/json') {
+      options.body = JSON.parse(options.body)
+    }
+  }
+
   // Transform to JSON
   const jsonOptions = Object.keys(options).length
     ? `, ${JSON.stringify(options, null, 2)}`