mutation support added

multiple data, error/mutate listeners on query

packages/example/lib/main.dart

@@ -2,6 +2,7 @@ import 'dart:math';
 
 import 'package:example/another_component.dart';
 import 'package:example/lazy_query.dart';
+import 'package:example/mutation_example.dart';
 import 'package:example/query_with_external_data.dart';
 import 'package:fl_query/fl_query.dart';
 import 'package:flutter/material.dart';
@@ -137,6 +138,17 @@ class _MyHomePageState extends State<MyHomePage> {
               );
             },
           ),
+          const SizedBox(height: 10),
+          ElevatedButton(
+            child: const Text("Mutation Example"),
+            onPressed: () {
+              Navigator.of(context).push(
+                MaterialPageRoute(
+                  builder: (context) => const MutationExample(),
+                ),
+              );
+            },
+          ),
           const AnotherComponent(),
         ],
       ),

packages/example/lib/mutation_example.dart

@@ -0,0 +1,94 @@
+import 'dart:convert';
+import 'dart:math';
+
+import 'package:fl_query/models/mutation_job.dart';
+import 'package:fl_query/mutation_builder.dart';
+import 'package:flutter/material.dart';
+import 'package:http/http.dart' as http;
+
+final postSomethingJob = MutationJob<Map, Map<String, dynamic>>(
+  mutationKey: "post-something-job",
+  task: (key, data) async {
+    final response = await http.post(
+      Uri.parse(
+        "https://jsonplaceholder.typicode.com/posts",
+      ),
+      headers: {'Content-type': 'application/json; charset=UTF-8'},
+      body: jsonEncode(data),
+    );
+    return jsonDecode(response.body);
+  },
+);
+
+class MutationExample extends StatefulWidget {
+  const MutationExample({Key? key}) : super(key: key);
+
+  @override
+  State<MutationExample> createState() => _MutationExampleState();
+}
+
+class _MutationExampleState extends State<MutationExample> {
+  late TextEditingController titleController;
+  late TextEditingController bodyController;
+  late int id;
+  @override
+  void initState() {
+    super.initState();
+    id = Random().nextInt(2000000);
+    titleController = TextEditingController();
+    bodyController = TextEditingController();
+  }
+
+  @override
+  void dispose() {
+    titleController.dispose();
+    bodyController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text("Post Something")),
+      body: MutationBuilder<Map, Map<String, dynamic>>(
+          job: postSomethingJob,
+          builder: (context, mutation) {
+            return Padding(
+              padding: const EdgeInsets.all(8.0),
+              child: Column(
+                children: [
+                  TextField(
+                    controller: titleController,
+                    decoration: const InputDecoration(labelText: "Title"),
+                  ),
+                  TextField(
+                    controller: bodyController,
+                    decoration: const InputDecoration(labelText: "Body"),
+                  ),
+                  const SizedBox(height: 20),
+                  ElevatedButton(
+                    onPressed: () {
+                      final title = titleController.value.text;
+                      final body = bodyController.value.text;
+                      if (body.isEmpty || title.isEmpty) return;
+                      mutation.mutate({
+                        "title": title,
+                        "body": body,
+                        "id": id,
+                      }, onData: (data) {
+                        // resetting the form
+                        titleController.text = "";
+                        bodyController.text = "";
+                      });
+                    },
+                    child: const Text("Post"),
+                  ),
+                  const SizedBox(height: 20),
+                  if (mutation.hasData) Text("Response\n${mutation.data}")
+                ],
+              ),
+            );
+          }),
+    );
+  }
+}

packages/example/pubspec.lock

@@ -81,6 +81,20 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  http:
+    dependency: "direct main"
+    description:
+      name: http
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.13.4"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.0.1"
   lints:
     dependency: transitive
     description:
@@ -163,6 +177,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.4.9"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.1"
   vector_math:
     dependency: transitive
     description:

packages/example/pubspec.yaml

@@ -35,6 +35,7 @@ dependencies:
   cupertino_icons: ^1.0.2
   fl_query:
     path: ../fl_query
+  http: ^0.13.4
 
 dev_dependencies:
   flutter_test: