loplat_plengi 1.0.5

loplat plengi(Place Engine) SDK plugin project.

example/lib/main.dart

import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'dart:isolate';
import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:intl/intl.dart';
import 'package:loplat_plengi/loplat_plengi.dart';
import 'package:permission_handler/permission_handler.dart';

/// The name associated with the UI isolate's [SendPort].
const String isolateName = 'isolate';

/// A port used to communicate from a background isolate to the UI isolate.
final ReceivePort port = ReceivePort();

/// The background port
SendPort? uiSendPort;

/// The callback for loplat plengi
Future<bool> callback(String msg) async {
  String locationInfo = getLocationInfo(msg);
  print('result: $locationInfo');

  // This will be null if we're running in the background.
  uiSendPort ??= IsolateNameServer.lookupPortByName(isolateName);
  uiSendPort?.send(null);
  return true;
}

String getLocationInfo(String log) {
  if (log.isEmpty) {
    return '';
  }
  Map<String,dynamic> jsonData = jsonDecode(log);
  String inNear = '';
  String locationInfo = '';
  if (jsonData['place'] != null) {
    if (jsonData['place']['accuracy'] >= jsonData['place']['threshold']) {
      inNear = '[IN]';
    } else {
      inNear = '[NEAR]';
    }
    locationInfo += '  $inNear${jsonData['place']['name']},'
        '${jsonData['place']['tags']}(${jsonData['place']['loplat_id']}),'
        '${jsonData['place']['floor']}F,${jsonData['place']['accuracy']}/${jsonData['place']['threshold']}';
  }
  if (jsonData['complex'] != null) {
    locationInfo += '\n  [${jsonData['complex']['id']}]${jsonData['complex']['name']}';
  }
  if (jsonData['area'] != null) {
    locationInfo += '\n  [${jsonData['area']['id']}]${jsonData['area']['tag']},${jsonData['area']['name']}';
  }
  if (jsonData['district'] != null) {
    locationInfo += '\n  ${jsonData['district']['lv1_name']} ${jsonData['district']['lv2_name']} ${jsonData['district']['lv3_name']}';
  }
  if (jsonData['location'] != null) {
    locationInfo += '\n  ${jsonData['location']['lat']}, ${jsonData['location']['lng']}';
  }
  if (jsonData['ad'] != null) {
    locationInfo += '\n  ${jsonData['ad']['campaign_id']}, ${jsonData['ad']['title']}, ${jsonData['ad']['body']}';
  }
  return locationInfo;
}

Future<void> main() async {
  /// Register the UI isolate's SendPort to allow for communication from the background isolate.
  IsolateNameServer.registerPortWithName(
    port.sendPort,
    isolateName,
  );

  runApp(const MyApp());

  /// After runApp, register callback
  LoplatPlengiPlugin.setListener(callback);
}

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

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  String _plengiStatus = "NOT_INITIALIZED";
  String _loplatResults = '';
  var getLocationButEnabled = true;

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

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    await Permission.locationWhenInUse.request().isGranted;
    var status = await Permission.locationWhenInUse.status;
    if (status.isDenied) {
      openAppSettings();
    }

    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion =
          await LoplatPlengiPlugin.platformVersion ?? 'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    int engineStatus = await LoplatPlengiPlugin.getEngineStatus;
    String engineStatusStr = "NOT_INITIALIZED";
    if (engineStatus == -1) {
      engineStatusStr = "NOT_INITIALIZED";
      var status = await LoplatPlengiPlugin.start("loplat", "loplatsecret");
      if (status == 0) {
        engineStatusStr = "STARTED";
      }
    } else if (engineStatus == 0) {
      engineStatusStr = "STOPPED";
      if (Platform.isIOS) {
        var status = await LoplatPlengiPlugin.start("loplat", "loplatsecret");
        if (status == 0) {
          engineStatusStr = "STARTED";
        }
      }
    } else if (engineStatus == 1) {
      engineStatusStr = "STARTED";
    } else if (engineStatus == 2) {
      engineStatusStr = "STOPPED_TEMP";
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
      _plengiStatus = engineStatusStr;
    });
  }

  updateLog(String log) {
    if (log.isEmpty) {
      return;
    }
    String locationInfo = getLocationInfo(log);
    if (locationInfo.isNotEmpty) {
      String formattedDate = DateFormat('MM-dd HH:mm:ss').format(
          DateTime.now());
      setState(() {
        _loplatResults = '$formattedDate\n$locationInfo\n\n$_loplatResults';
        getLocationButEnabled = true;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text(
            'loplat SDK plugin example app',
            style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
          ),
        ),
        body: Builder(
          builder: (context) => _buildBody(context)
        )
      ),
    );
  }

  Widget _buildBody(BuildContext context) {
    return Padding(
        padding: const EdgeInsets.all(8.0),
        child: SafeArea(
          child: Center(
            child: Column(
              children: <Widget>[
                Text(
                    'Running on: $_platformVersion\nplaceEngineStatus: $_plengiStatus'),
                ElevatedButton(
                  child: const Text('Get Location'),
                  onPressed: getLocationButEnabled? () {
                    setState(() {
                      getLocationButEnabled = false;
                    });
                    Timer _timer = Timer(const Duration(seconds: 8), () {
                      setState(() {
                        if (!getLocationButEnabled) {
                          getLocationButEnabled = true;
                          ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                  content: Text('응답시간이 초과되었습니다'))
                          );
                        }
                      });
                    });
                    _getCurrentPlace().then((value) {
                      _timer.cancel();
                      updateLog(value!);
                    });
                  }: null,
                ),
                Expanded(
                    flex: 1,
                    child: Align (alignment: Alignment.topLeft,
                        child: SingleChildScrollView(
                            child: Text(_loplatResults)
                        )
                    )
                )
              ],
            ),
          ),
        ));
  }

  Future<String?> _getCurrentPlace() async {
    String? res = await LoplatPlengiPlugin.testRefreshPlaceForeground();
    if (res == null || res.isEmpty) {
      return '응답 결과가 없습니다';
    }
    return res;
  }
}