ANDREAS_LATANOWSKY_CPD_1910877/lib/http_utils.dart

import 'dart:convert';
import 'dart:io';
import 'package:cpd_app/language_utils.dart';
import 'package:flutter/services.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:http/http.dart' as http;
import 'package:http/http.dart';
import 'package:http_parser/http_parser.dart';
import 'package:flutter/material.dart';
import 'package:connectivity/connectivity.dart';
import 'dart:async';

class HttpUtils {
  var client = http.Client();

  Future<String> checkLang(Uint8List imageBytes, String imageName) async {
    var postUri = Uri.parse("http://130.61.27.201/upload");

    http.MultipartRequest request = http.MultipartRequest("POST", postUri);

    http.MultipartFile multipartFile = http.MultipartFile.fromBytes(
      'file',
      imageBytes,
      filename: 'lorem.png',
      contentType: MediaType('image', 'png'),
    );

    request.files.add(multipartFile);

    http.StreamedResponse response = await client.send(request);
    http.Response finalResponse = await http.Response.fromStream(response);
    var lang = "";
    if (finalResponse.statusCode == 200) {
      Map<String, dynamic> jsonData = jsonDecode(finalResponse.body);
      lang = jsonData['language'];
    } else {
      throw ('Error: ${finalResponse.statusCode}');
    }
    return lang;
  }

  Future<String> extractTextKnownSource(
      Uint8List imageBytes, String sourceLang) async {
    var postUri = Uri.parse("http://130.61.27.201/extractWithKnownSource");

    http.MultipartRequest request = http.MultipartRequest("POST", postUri);
    http.MultipartFile multipartFile = http.MultipartFile.fromBytes(
      'file',
      imageBytes,
      filename: 'lorem.png',
      contentType: MediaType('image', 'png'),
    );

    MultipartFile source = MultipartFile.fromString(
      'sourceLang',
      sourceLang,
    );

    request.files.add(multipartFile);
    request.files.add(source);

    http.StreamedResponse response = await client.send(request);
    http.Response finalResponse = await http.Response.fromStream(response);
    var lang = "";
    if (finalResponse.statusCode == 200) {
      lang = finalResponse.body.toString();
    } else {
      throw ('Error: ${finalResponse.statusCode}');
    }
    return lang;
  }

  Future<String> extractTextUnknownSource(Uint8List imageBytes) async {
    var postUri = Uri.parse("http://130.61.27.201/extractWithoutKnownSource");

    http.MultipartRequest request = http.MultipartRequest("POST", postUri);

    http.MultipartFile multipartFile = http.MultipartFile.fromBytes(
      'file',
      imageBytes,
      filename: 'lorem.png',
      contentType: MediaType('image', 'png'),
    );

    request.files.add(multipartFile);

    http.StreamedResponse response = await client.send(request);
    http.Response finalResponse = await http.Response.fromStream(response);
    var lang = "";
    if (finalResponse.statusCode == 200) {
      lang = finalResponse.body.toString();
    } else {
      throw ('Error: ${finalResponse.statusCode}');
    }
    return lang;
  }

  Future<Uint8List> translateKnownSource(
      Uint8List imageBytes, String sourceLang, String targetLang) async {
    var url = Uri.parse("http://130.61.27.201/translKnownSource");

    http.MultipartRequest request = http.MultipartRequest("POST", url);
    http.MultipartFile multipartFile = http.MultipartFile.fromBytes(
      'file',
      imageBytes,
      filename: 'lorem.png',
      contentType: MediaType('image', 'png'),
    );

    MultipartFile source = MultipartFile.fromString(
      'sourceLang',
      LanguageUtils.translatorLanguages[sourceLang]!,
    );

    MultipartFile target = MultipartFile.fromString(
      'targetLang',
      LanguageUtils.translatorLanguages[targetLang]!,
    );

    request.files.add(multipartFile);
    request.files.add(source);
    request.files.add(target);
    http.StreamedResponse response = await client.send(request);
    http.Response finalResponse = await http.Response.fromStream(response);
    Uint8List lang = Uint8List(0);
    if (finalResponse.statusCode == 200) {
      lang = Uint8List.fromList(finalResponse.bodyBytes);
    } else {
      throw ('Error: ${finalResponse.statusCode}');
    }
    return lang;
  }

  void showProgressBar(BuildContext context) {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (BuildContext context) {
        return const Dialog(
          backgroundColor: Color.fromARGB(0, 44, 44, 44),
          elevation: 0,
          child: Center(
            child: CircularProgressIndicator(),
          ),
        );
      },
    );
  }

  void hideProgressBar(BuildContext context) {
    Navigator.pop(context);
  }

  Future<bool> internetConnectivityCheck() async {
    if (Platform.isAndroid) {
      var connectivityResult = await Connectivity().checkConnectivity();
      return connectivityResult == ConnectivityResult.wifi ||
          connectivityResult == ConnectivityResult.mobile;
    } else {
      final response = await http.get(Uri.parse('http://130.61.27.201'));
      return response.statusCode == 200;
    }
  }

  void triggerNoInetToast() {
    Fluttertoast.showToast(
      msg: "No internet connection",
      toastLength: Toast.LENGTH_SHORT,
      gravity: ToastGravity.BOTTOM,
      timeInSecForIosWeb: 1,
      backgroundColor: const Color.fromARGB(255, 161, 120, 17),
      textColor: Colors.white,
      fontSize: 16.0,
    );
  }

  void triggerConnectedToast() {
    Fluttertoast.showToast(
      msg: "Connected",
      toastLength: Toast.LENGTH_SHORT,
      gravity: ToastGravity.BOTTOM,
      timeInSecForIosWeb: 1,
      backgroundColor: const Color.fromARGB(255, 161, 120, 17),
      textColor: Colors.white,
      fontSize: 16.0,
    );
  }
}