oeffimaster/lib/api_handler.dart

import 'package:http/http.dart' as http;
import 'package:flutter_dotenv/flutter_dotenv.dart';

import 'dart:core';
import 'dart:convert';

import 'transport_helper.dart';

class ApiHandler {
  // TODO: Split next line for better Error Handling
  static final String baseUrl = dotenv.get("VBB_API_URL");
  static final String accessID = dotenv.get("VBB_API_KEY");

  // TODO: function calls for the following API calls
  //   - [x] location.name: findStations
  //   - [ ] location.nearbystops
  //   - [ ] location.details
  //   - [ ] departureBoard
  //   - [ ] multiDepartureBoard
  //   - [ ] journeyDetails

  //static Future<Map<String, dynamic>> findStations(String locationName) async {
  static Future<List<String>> findStations(String locationName, {int? maxStations=5}) async {
    String urlPath = '/api/fahrinfo/latest/location.name';
    Uri url = Uri.https(baseUrl, urlPath, {
      'accessId': accessID,
      'input': locationName,
      'maxNo': maxStations.toString(),
      'type': 'S' // Station/Stops only
    });
    //print(url);
    var jsonResponse = await http.get(url,
        headers: {
          'Accept': 'application/json'
    });
    final httpPackageJson = json.decode(jsonResponse.body) as Map<String, dynamic>;
    //print(httpPackageJson["stopLocationOrCoordLocation"]);
    final idList = httpPackageJson["stopLocationOrCoordLocation"].map( (x) => x["StopLocation"]["id"]);
    //print("and now just ids: ");
    //print(id);
    return idList;
  }

  static Future<List<String>> nearbyStations(String latitude, String longitude,
      {int? maxStations=5}) async {
    String urlPath = '/api/fahrinfo/latest/location.nearbystops';
    Uri url = Uri.https(baseUrl, urlPath, {
      'accessId': accessID,
      'originCoordLat': latitude,
      'originCoordLong': longitude,
      'maxNo': maxStations.toString(),
      'type': 'S' // Station/Stops only
    });
    var jsonResponse = await http.get(url,
        headers: {
          'Accept': 'application/json'
    });
    final httpPackageJson = json.decode(jsonResponse.body) as Map<String, dynamic>;
    final idList = httpPackageJson["stopLocationOrCoordLocation"].map( (x) => x["StopLocation"]["id"]);
    return idList;
  }

  static Future<List<String>> departures(String station,
      {int? maxDepartures=-1, int? duration=-1}) async {
    String urlPath = '/api/fahrinfo/latest/departureBoard';
    String stationString = station.replaceAll(' ', '%20'); // reform for URL

    Uri url = Uri.https(baseUrl, urlPath, {
      'accessId': accessID,
      'id': stationString,
      ////'time': /current time //time from which departures will be shown
      'duration': duration.toString(), //interval time in minutes
      'maxJourneys': maxDepartures.toString(),
      'type': 'S' // Station/Stops only
    });
    var jsonResponse = await http.get(url,
        headers: {
          'Accept': 'application/json'
        });
    final httpPackageJson = json.decode(jsonResponse.body) as Map<String, dynamic>;
    final idList = httpPackageJson["Departure"].map( (x) => x["ProductAtStop"]["num"]);
    return idList;
  }

  static Future<List<String>> departuresAggregate(List<String> stationList,
      {int? maxDepartures=-1, int? duration=-1}) async {
    String urlPath = '/api/fahrinfo/latest/multiDepartureBoard';
    String stationListString = stationList
        .reduce((value, element) => value + '|' + element)
        .replaceAll(' ', '%20'); // reform for URL

    Uri url = Uri.https(baseUrl, urlPath, {
      'accessId': accessID,
      'id': stationListString,
      ////'time': /current time //time from which departures will be shown
      'duration': duration.toString(), //interval time in minutes
      'maxJourneys': maxDepartures.toString(),
      'type': 'S' // Station/Stops only
    });
    var jsonResponse = await http.get(url,
        headers: {
          'Accept': 'application/json'
        });
    final httpPackageJson = json.decode(jsonResponse.body) as Map<String, dynamic>;
    final idList = httpPackageJson["Departure"].map( (x) => x["ProductAtStop"]["num"]);
    return idList;
  }

  static Future<List<String>> trip(
      String originId,
      String destinationId,
      {
        String? via,
        String? viaID,
        String? date,
        String? time,
        int? maxChange,
        int? minChangeTime,
        int? maxChangeTime,
        bool? arrivalTime,
        // int? products, // which transport modi to use - ignore for now
        // String rtMode, // wherether to use real time data
        // String trainFilter,
      }) async {
    String urlPath = '/api/fahrinfo/latest/trip';
    String startId = originId.replaceAll(' ', '%20'); // reform for URL
    String endId = destinationId.replaceAll(' ', '%20'); // reform for URL

    Uri url = Uri.https(baseUrl, urlPath, {
      'accessId': accessID,
      'originId': startId,
      'destId': endId,
      ////'time': /current time //time from which departures will be shown
      'time': time.toString(), //interval time in minutes
      'maxChange': maxChange.toString(),
      'type': 'S' // Station/Stops only
    });
    var jsonResponse = await http.get(url,
        headers: {
          'Accept': 'application/json'
    });
    final httpPackageJson = json.decode(jsonResponse.body) as Map<String, dynamic>;
    final idList = httpPackageJson["Trip"].map(
            (x) => x["LegList"]["Leg"].map(
                    (y) => y["JourneyDetail"]["ref"])
    );
    return idList;

  }

  static Future<List<String>> tripDetail(
      String id,
      {
        String? date,
        String? fromId,
        int? fromIdx,
        String? toId,
        int? toIdx
      }) async {

    String urlPath = '/api/fahrinfo/latest/journeyDetail';
    Uri url = Uri.https(baseUrl, urlPath, {
      'accessId': accessID,
      'id': id,
      'fromId': fromId,
      'toId': toId,
    });
    var jsonResponse = await http.get(url,
        headers: {
          'Accept': 'application/json'
    });
    final httpPackageJson = json.decode(jsonResponse.body) as Map<String, dynamic>;
    final idList = httpPackageJson["Stops"]["Stop"].map( (x) => x["id"]);
    return idList;
  }
}