Support to update partition num

lib/api/pulsar/pulsar_partitioned_topic_api.dart

@@ -43,6 +43,23 @@ class PulsarPartitionedTopicAPi {
     return response.body;
   }
 
+  static Future<String> modifyPartitionTopic(String host, int port,
+      String tenant, String namespace, String topic, int partitionNum) async {
+    var url =
+        'http://$host:${port.toString()}/admin/v2/persistent/$tenant/$namespace/$topic/partitions';
+    var response = await http.post(Uri.parse(url),
+        headers: <String, String>{
+          'Content-Type': 'application/json; charset=UTF-8',
+        },
+        body: partitionNum.toString());
+    if (HttpUtil.abnormal(response.statusCode)) {
+      log('ErrorCode is ${response.statusCode}, body is ${response.body}');
+      throw Exception(
+          'ErrorCode is ${response.statusCode}, body is ${response.body}');
+    }
+    return response.body;
+  }
+
   static Future<List<TopicResp>> getTopics(
       String host, int port, String tenant, String namespace) async {
     var url =

lib/ui/pulsar/widget/pulsar_partitioned_topic_basic.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:paas_dashboard_flutter/generated/l10n.dart';
 import 'package:paas_dashboard_flutter/ui/util/exception_util.dart';
+import 'package:paas_dashboard_flutter/ui/util/form_util.dart';
 import 'package:paas_dashboard_flutter/ui/util/spinner_util.dart';
 import 'package:paas_dashboard_flutter/vm/pulsar/pulsar_partitioned_topic_basic_view_model.dart';
 import 'package:provider/provider.dart';
@@ -21,6 +22,7 @@ class PulsarPartitionedTopicBasicWidgetState
     super.initState();
     final vm = Provider.of<PulsarPartitionedTopicBasicViewModel>(context,
         listen: false);
+    vm.fetchPartitions();
   }
 
   @override
@@ -33,6 +35,7 @@ class PulsarPartitionedTopicBasicWidgetState
     }
     ExceptionUtil.processLoadException(vm, context);
     ExceptionUtil.processOpException(vm, context);
+    var formButton = modifyPartitionTopicButton(context);
     var refreshButton =
         TextButton(onPressed: () {}, child: Text(S.of(context).refresh));
     var body = ListView(
@@ -45,8 +48,32 @@ class PulsarPartitionedTopicBasicWidgetState
             children: [refreshButton],
           ),
         ),
+        Container(
+          height: 50,
+          child: ListView(
+            scrollDirection: Axis.horizontal,
+            shrinkWrap: true,
+            children: [
+              Text(
+                'partition num is ${vm.partitionNum}',
+                style: new TextStyle(fontSize: 20),
+              ),
+              formButton
+            ],
+          ),
+        ),
       ],
     );
     return body;
   }
+
+  ButtonStyleButton modifyPartitionTopicButton(BuildContext context) {
+    var list = [FormFieldDef('New Partition Number')];
+    return FormUtil.updateButton1("Topic Partitions", list, context,
+        (partition) async {
+      final vm = Provider.of<PulsarPartitionedTopicBasicViewModel>(context,
+          listen: false);
+      vm.modifyTopicPartition(vm.topic, int.parse(partition));
+    });
+  }
 }

lib/ui/util/form_util.dart

@@ -19,7 +19,7 @@ class FormUtil {
       throw AssertionError('args not match');
     }
     return createButton(resourceName, formFieldDefList, context,
-            (list) => callback(list[0], list[1], list[2]));
+        (list) => callback(list[0], list[1], list[2]));
   }
 
   static ButtonStyleButton createButton2(
@@ -95,4 +95,90 @@ class FormUtil {
         },
         child: Text('Create ' + resourceName));
   }
+
+  static ButtonStyleButton updateButton3(
+      String resourceName,
+      List<FormFieldDef> formFieldDefList,
+      BuildContext context,
+      Function(String, String, String) callback) {
+    if (formFieldDefList.length != 3) {
+      throw AssertionError('args not match');
+    }
+    return updateButton(resourceName, formFieldDefList, context,
+        (list) => callback(list[0], list[1], list[2]));
+  }
+
+  static ButtonStyleButton updateButton2(
+      String resourceName,
+      List<FormFieldDef> formFieldDefList,
+      BuildContext context,
+      Function(String, String) callback) {
+    if (formFieldDefList.length != 2) {
+      throw AssertionError('args not match');
+    }
+    return updateButton(resourceName, formFieldDefList, context,
+        (list) => callback(list[0], list[1]));
+  }
+
+  static ButtonStyleButton updateButton1(
+      String resourceName,
+      List<FormFieldDef> formFieldDefList,
+      BuildContext context,
+      Function(String) callback) {
+    if (formFieldDefList.length != 1) {
+      throw AssertionError('args not match');
+    }
+    return updateButton(
+        resourceName, formFieldDefList, context, (list) => callback(list[0]));
+  }
+
+  static ButtonStyleButton updateButton(
+      String resourceName,
+      List<FormFieldDef> formFieldDefList,
+      BuildContext context,
+      Function(List<String>) callback) {
+    return TextButton(
+        onPressed: () {
+          var editControllerList =
+              formFieldDefList.map((e) => TextEditingController()).toList();
+          List<TextFormField> formFieldsList = List.generate(
+              formFieldDefList.length,
+              (index) => TextFormField(
+                    decoration: InputDecoration(
+                        labelText: formFieldDefList[index].fieldName),
+                    controller: editControllerList[index],
+                  ));
+          showDialog(
+              context: context,
+              builder: (BuildContext context) {
+                return AlertDialog(
+                  scrollable: true,
+                  title: Text(resourceName + ' Form'),
+                  content: Form(
+                      child: Column(
+                    children: formFieldsList,
+                  )),
+                  actions: [
+                    ElevatedButton(
+                      child: Text(CREATE),
+                      onPressed: () {
+                        var list = editControllerList
+                            .map((e) => e.value.text)
+                            .toList();
+                        callback(list);
+                        Navigator.of(context).pop();
+                      },
+                    ),
+                    ElevatedButton(
+                      child: Text(CANCEL),
+                      onPressed: () {
+                        Navigator.of(context).pop();
+                      },
+                    )
+                  ],
+                );
+              });
+        },
+        child: Text('Update ' + resourceName));
+  }
 }

lib/vm/pulsar/pulsar_partitioned_topic_basic_view_model.dart

@@ -1,3 +1,4 @@
+import 'package:paas_dashboard_flutter/api/pulsar/pulsar_partitioned_topic_api.dart';
 import 'package:paas_dashboard_flutter/module/pulsar/pulsar_namespace.dart';
 import 'package:paas_dashboard_flutter/module/pulsar/pulsar_tenant.dart';
 import 'package:paas_dashboard_flutter/module/pulsar/pulsar_topic.dart';
@@ -9,6 +10,7 @@ class PulsarPartitionedTopicBasicViewModel extends BaseLoadViewModel {
   final TenantResp tenantResp;
   final NamespaceResp namespaceResp;
   final TopicResp topicResp;
+  String partitionNum = "";
 
   PulsarPartitionedTopicBasicViewModel(this.pulsarInstancePo, this.tenantResp,
       this.namespaceResp, this.topicResp);
@@ -45,4 +47,28 @@ class PulsarPartitionedTopicBasicViewModel extends BaseLoadViewModel {
   String get topic {
     return this.topicResp.topicName;
   }
+
+  Future<void> fetchPartitions() async {
+    try {
+      final results = await PulsarPartitionedTopicAPi.getDetails(
+          host, port, tenant, namespace, topic);
+      partitionNum = results.length.toString();
+      loadSuccess();
+    } on Exception catch (e) {
+      loadException = e;
+      loading = false;
+    }
+    notifyListeners();
+  }
+
+  Future<void> modifyTopicPartition(String topic, int partition) async {
+    try {
+      await PulsarPartitionedTopicAPi.modifyPartitionTopic(
+          host, port, tenant, namespace, topic, partition);
+      await fetchPartitions();
+    } on Exception catch (e) {
+      opException = e;
+      notifyListeners();
+    }
+  }
 }