mobile-flutter/covas_mobile/lib/pages/DisplayPictureScreen.dart

import 'package:flutter/material.dart';
import 'dart:io';
import '../classes/addEventImage.dart';
import '../classes/alert.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import 'package:flutter_gemini/flutter_gemini.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:http/http.dart' as http;
import "ItemMenu.dart";
import 'UpdateEventImage.dart';

import 'dart:convert';

import '../variable/globals.dart' as globals;

void main() {
  runApp(MyApp());
}

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

  // This widget is the root of your application.

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
    );
  }
}

// A screen that allows users to take a picture using a given camera.
class DisplayPictureScreen extends StatefulWidget {
  final String imagePath;

  const DisplayPictureScreen({super.key, required this.imagePath});

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

// A widget that displays the picture taken by the user.
class DisplayPictureScreenState extends State<DisplayPictureScreen>
    with ShowDescImageAdd, ShowErrorDialog {
  @override
  void initState() {
    super.initState();

    _getEventInfosFromImage();
  }

  Future<void> displayError(String e) async {
    print("problem gemini : ${e}");
    showErrorDialog(context,
        "L'IA de Google n'a pas su analyser l'image. Recommecer avec une autre");
  }

  Future<void> searchEvents(String json) async {
    print(json);
    SharedPreferences prefs = await SharedPreferences.getInstance();

    Map<String, dynamic> jsonData = jsonDecode(json);
    var name = jsonData["name"];
    var place = jsonData["place"];
    var accessToken = prefs.getString("access_token") ?? "";

    if (accessToken.isNotEmpty) {
      var urlGet = Uri.parse("${globals.api}/events?name=${name}");

      var responseGet = await http.get(urlGet,
          headers: {HttpHeaders.cookieHeader: 'access_token=${accessToken}'});
      if (responseGet.statusCode == 200) {
        var events = jsonDecode(utf8.decode(responseGet.bodyBytes));
        print("reponse  http : ${events.length}");
        if (events.length == 0) {
          Navigator.push(
              context,
              MaterialPageRoute(
                  builder: (_) => UpdateeventImage(events: jsonData)));
        } else {
          Navigator.push(
              context,
              MaterialPageRoute(
                  builder: (_) => ItemMenu(title: events[0]["id"])));
        }
      }
    } else {
      showErrorDialog(context, "Erreur de token");
    }

    //showDescImageAddDialog(context, message);
  }

  Future<void> _getEventInfosFromImage() async {
    await dotenv.load();

    final gemini = Gemini.init(
        apiKey: dotenv.env['GEMINI_API_KEY']!, enableDebugging: true);

    final file = File(widget.imagePath);

    gemini
        .textAndImage(
            text:
                "Peux-tu donner le nom, la date et le lieu de l'évènement sous format JSON avec les valeurs suivantes : name, place et date avec le format suivant YYYY-MM-ddTTHH:mm, et sans la présence de json dans la chaîne de caractère",
            images: [file.readAsBytesSync()],
            modelName: "models/gemini-1.5-flash-latest")
        .then((value) => searchEvents(value?.content?.parts?.last.text ?? ''))
        .catchError((e) => displayError);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: const Text('Display the Picture')),
        // The image is stored as a file on the device. Use the `Image.file`
        // constructor with the given path to display the image.
        body: SingleChildScrollView(
            child: Column(children: <Widget>[
          Image.file(File(widget.imagePath)),
          Text("Analyse en cours...")
        ])));
  }
}