viewevents.dart

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

class ViewEvents extends StatefulWidget {
  const ViewEvents({Key? key}) : super(key: key);

  @override
  _ViewEvents createState() => _ViewEvents();
}

class _ViewEvents extends State<ViewEvents> {
  int _synccounter = 0;  //For displaying progress during event upload

  Future<String?> login() async {
    String? token;
    ConfigurationStoreInstance configuration = ConfigurationStoreInstance();

    String url = 'https://sandbox.sensor.awi.de/rest/sensors/contacts/login';
    debugPrint("Start login to : " + url);

    Map<String, dynamic> body = {'username': configuration.loginInformation.mail, 'authPassword': configuration.loginInformation.password};
    String encodedBody = body.keys.map((key) => "$key=${body[key]}").join("&");
    debugPrint(encodedBody);

    final response = await http.post(Uri.parse(url),
        body: encodedBody,
        headers: {
          'Accept' : 'application/json',
          'Content-Type' : 'application/x-www-form-urlencoded'
        },
        encoding: Encoding.getByName("utf-8")
    );

    if (response.statusCode == 200) {
      debugPrint('Login success');
      //TODO: display feedback to user that credentials are correct

      token = response.headers['set-cookie']?.split(';')[0];

      debugPrint("Token:" + token!);
      debugPrint(response.body.toString());
      debugPrint(response.headers.toString());
      debugPrint(response.headers['set-cookie']);


    } else {
      debugPrint('Header: ' + response.headers.toString());
      debugPrint('Body: ' + response.body.toString());
      debugPrint('StatusCode: ' + response.statusCode.toString());
      throw Exception('Failed to login');


    }
    return token;
  }

  Future<bool> syncEvents() async {
    final EventStoreInstance events = EventStoreInstance();
    final ConfigurationStoreInstance configuration = ConfigurationStoreInstance();
    String? token = await login();

    if (token != null) {
      String baseUrl = 'https://sandbox.sensor.awi.de/rest/sensors/events/putEvent/';
      String url = '';

      _synccounter = events.getPendingEventCount();
      debugPrint('Number of Events: ' + events.events.length.toString());
      debugPrint('Number of Pending Events: ' + _synccounter.toString());
      var index = 0;
      for (var event in events.events) {
        if (event.status == 'PENDING') {
          debugPrint('Idx: ' + index.toString() + ' ' +
              event.toSensorJson().toString());
          index++;

          url = baseUrl + event.id.toString() + '?createVersion=false';
          debugPrint('XXX ' + Uri.parse(url).toString());
          final response = await http.put(Uri.parse(url),
            headers: {
              "Content-Type": "application/json",
              "Cookie": token
            },
            body: event.toSensorJson().toString(),
            encoding: Encoding.getByName("utf-8"),
          );

          if (response.statusCode == 201) {
            _synccounter--;
            debugPrint(
                'put success, remaining events: ' + _synccounter.toString());
            event.status =
            'EXPORTED'; //Update event status so that it is only exported once.


            setState(() {});

            debugPrint(response.body.toString());
            debugPrint(response.headers.toString());
            debugPrint(response.headers['set-cookie']);
          } else {
            debugPrint('Header: ' + response.headers.toString());
            debugPrint('Body: ' + response.body.toString());
            debugPrint('StatusCode: ' + response.statusCode.toString());
            throw Exception('Failed to put.');
          }
        }
      }
      return true;
    }
    return false;
  }

  @override
  Widget build(BuildContext context) {
    // Get singleton to access locally stored events:
    final EventStoreInstance events = EventStoreInstance();
    return Scaffold(
      appBar: AppBar(
        title: const Text("View Added Events"),
      ),
      body: SingleChildScrollView(
        scrollDirection: Axis.horizontal,
        child: SingleChildScrollView(
          scrollDirection: Axis.vertical,
          child: DataTable(
            columns: const <DataColumn>[
              DataColumn(
                label: Text(
                  'Id',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'URN',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'Label',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'Type',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'Description',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'StartDate',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'EndDate',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'Latitude',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'Longitude',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'Elevation',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
              DataColumn(
                label: Text(
                  'Status',
                  style: TextStyle(fontStyle: FontStyle.italic),
                ),
              ),
            ],
            rows: <DataRow>[
              for (var event in events.events)
                DataRow(
                  cells: <DataCell>[
                    DataCell(Text(event.id.toString())),
                    DataCell(Text(event.urn)),
                    DataCell(
                      TextFormField(
                        readOnly: true,
                        initialValue: event.label,
                        onFieldSubmitted: (val) {
                          event.label = val; //Update Database
                        },
                      ),
                    ),
                    DataCell(Text(event.type)),
                    DataCell(
                      TextFormField(
                        readOnly: true,
                        initialValue: event.description,
                        onFieldSubmitted: (val) {
                          event.description = val; //Update Database
                        },
                      ),
                    ),
                    DataCell(Text(event.startDate)),
                    DataCell(Text(event.endDate)),
                    DataCell(
                      TextFormField(
                        readOnly: true,
                        initialValue: event.latitude,
                        onFieldSubmitted: (val) {
                          event.latitude = val; //Update Database
                        },
                      ),
                    ),
                    DataCell(
                      TextFormField(
                        readOnly: true,
                        initialValue: event.longitude,
                        onFieldSubmitted: (val) {
                          event.longitude = val; //Update Database
                        },
                      ),
                    ),
                    DataCell(
                      TextFormField(
                        readOnly: true,
                        initialValue: event.elevation,
                        onFieldSubmitted: (val) {
                          event.elevation = val; //Update Database
                        },
                      ),
                    ),
                    DataCell(
                      TextFormField(
                        readOnly: true,
                        initialValue: event.status,
                        onFieldSubmitted: (val) {
                          event.status = val; //Update Database
                        },
                      ),
                    ),
                  ],
                ),
            ],
          ),
        ),
      ),
      bottomNavigationBar: Row(
        mainAxisAlignment: MainAxisAlignment.end,
        children: [
          FloatingActionButton.extended(
            heroTag: null,
            tooltip: 'Upload Events',
            icon: null,
            label: const Text('Sync'),
            onPressed: () {

              syncEvents();
              //showDialog(
              //  barrierDismissible: false,
              //  context: context,
              //  builder: (BuildContext context) => _buildPopupDialog(context),
              //);
            },
          ),
        ],
      ),
    );
  }

  Widget _buildPopupDialog(BuildContext context) {

    return AlertDialog(
      title: const Text('Uploading Events'),

      content: Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: <Widget>[
          //Text("Progress"),
          const CircularProgressIndicator(),
          const SizedBox(height: 10),
          Text('Remaining events to sync: ' + _synccounter.toString()),
        ],
      ),
      actions: <Widget>[
        TextButton(
          onPressed: () {
            //syncEvents();

            setState(() {

            });
            //Navigator.of(context).pop();
          },
          //textColor: Theme.of(context).primaryColor,
          child: const Text('Close'),
        ),
      ],
    );
  }
}

//TODO: allow editing fields here. Check validation of input value!