account_page_ubman.dart

import 'dart:convert';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

class AccountPage extends StatefulWidget {
  @override
  _AccountPageState createState() => _AccountPageState();
}

class _AccountPageState extends State<AccountPage> {
  var arrDaerah = [{"Nama":"Pilih Daerah","IdStr":""}];
  var idDaerah = '';
  var arrDesa = [{"Nama":"Pilih Desa","IdStr":""}];
  var idDesa = '';
  var arrKelompok = [{"Nama":"Pilih Kelompok","IdStr":""}];
  var idKelompok = '';

  Future<List> getDaerah() async {
    var url = 'https://spll-rangers.im-engine.com/master_level?query=parent:0';
    var resp = await http.get(url);
    var respDaerah = json.decode(resp.body)['Rows'];

    if (arrDaerah.length == 1) {
      for (var i = 0; i < respDaerah.length; i++) {
        var stringParams = {"Nama":"","IdStr":""};
        stringParams["Nama"] = respDaerah[i]["Nama"];
        stringParams["IdStr"] = respDaerah[i]["IdStr"];
        arrDaerah.add(stringParams);
      }
    }
  }

  Future<List> getDesa(String value) async {
    var url = 'https://spll-rangers.im-engine.com/master_level?query=parent:$value';
    var resp = await http.get(url);
    var respDesa = json.decode(resp.body)['Rows'];

    if (arrDesa.length == 1) {
      for (var i = 0; i < respDesa.length; i++) {
        var stringParams = {"Nama":"","IdStr":""};
        stringParams["Nama"] = respDesa[i]["Nama"];
        stringParams["IdStr"] = respDesa[i]["IdStr"];
        arrDesa.add(stringParams);
      }
    }
  }

  Future<List> getKelompok(String value) async {
    var url = 'https://spll-rangers.im-engine.com/master_level?query=parent:$value';
    var resp = await http.get(url);
    var respKelompok = json.decode(resp.body)['Rows'];

    if (arrKelompok.length == 1) {
      for (var i = 0; i < respKelompok.length; i++) {
        var stringParams = {"Nama":"","IdStr":""};
        stringParams["Nama"] = respKelompok[i]["Nama"];
        stringParams["IdStr"] = respKelompok[i]["IdStr"];
        arrKelompok.add(stringParams);
      }
    }
  }

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text("Halaman Akun"),
        ),
        floatingActionButton: FloatingActionButton(
            child: Icon(Icons.exit_to_app),
            onPressed: () {
              Navigator.pushReplacementNamed(context, "/login_page");
            }),
        body: new FutureBuilder<List>(
          future: getDaerah(), // async work
          builder: (BuildContext context, AsyncSnapshot<List> snapshot) {
            switch (snapshot.connectionState) {
              case ConnectionState.waiting:
              // return new CircularProgressIndicator();
              default:
                if (snapshot.hasError)
                  return new Text('Error: ${snapshot.error}');
                else
                  return Column(
                    children: <Widget>[
                      new DropdownButton<String>(
                        items: arrDaerah.map((var item) {
                          return new DropdownMenuItem<String>(
                            value: item["IdStr"].toString(),
                            child: Text(item["Nama"].toString()),
                          );
                        }).toList(),
                        onChanged: (newVal) {
                          setState(() {
                            idDaerah = newVal;
                            arrDesa = [{"Nama":"Pilih Desa","IdStr":""}];
                            idDesa = '';
                            getDesa(idDaerah);
                          });
                        },
                        value: idDaerah,
                      ),
                      new DropdownButton<String>(
                        items: arrDesa.map((var item) {
                          return new DropdownMenuItem<String>(
                            value: item["IdStr"].toString(),
                            child: Text(item["Nama"].toString()),
                          );
                        }).toList(),
                        onChanged: (newVal) {
                          setState(() {
                            idDesa = newVal;
                            arrKelompok = [{"Nama":"Pilih Kelompok","IdStr":""}];
                            idKelompok = '';
                            getKelompok(idDesa);
                          });
                        },
                        value: idDesa,
                      ),
                      new DropdownButton<String>(
                        items: arrKelompok.map((var item) {
                          return new DropdownMenuItem<String>(
                            value: item["IdStr"].toString(),
                            child: Text(item["Nama"].toString()),
                          );
                        }).toList(),
                        onChanged: (newVal) {
                          setState(() {
                            idKelompok = newVal;
                          });
                        },
                        value: idDesa,
                      ),
                    ],
                  );
            }
          },
        ));
  }
}