powerage-ristoris-flutter/lib/services/image_service.dart

import 'dart:io';
import 'package:http/http.dart' as http;
import 'package:path/path.dart' as p;
import 'package:path_provider/path_provider.dart';
import '../database/daos/parametri_dao.dart';
import '../core/constants.dart';

class ImageService {
  final ParametriDao _parametriDao;

  ImageService(this._parametriDao);

  String? token;

  Future<String?> getBaseUrl() => _parametriDao.read(AppConstants.kUrlParam);

  Map<String, String> get _headers {
    final headers = <String, String>{
      'Accept': 'application/json',
    };
    final t = token;
    if (t != null && t.isNotEmpty) {
      headers['Authorization'] = 'Bearer $t';
    }
    return headers;
  }

  String get _imageDir => 'PowerAge/images';

  Future<File?> getImage(String codArticolo, {bool thumb = true}) async {
    final dir = await getApplicationDocumentsDirectory();
    final imageDir = Directory(p.join(dir.path, _imageDir));
    if (!await imageDir.exists()) await imageDir.create(recursive: true);

    final suffix = thumb ? '_thumb' : '';
    final localFile = File(p.join(imageDir.path, '$codArticolo$suffix.jpg'));
    if (await localFile.exists()) return localFile;

    try {
      final baseUrl = await getBaseUrl();
      if (baseUrl == null || baseUrl.isEmpty) return null;
      final endpoint = thumb
          ? '/rest/articoli/image/thumb/$codArticolo'
          : '/rest/articoli/image/$codArticolo';
      final response = await http.get(
        Uri.parse('$baseUrl$endpoint'),
        headers: _headers,
      ).timeout(const Duration(seconds: 30));
      if (response.statusCode == 200 && response.bodyBytes.isNotEmpty) {
        await localFile.writeAsBytes(response.bodyBytes);
        return localFile;
      }
    } catch (_) { }
    return null;
  }

  Future<String?> getImageUrl(String codArticolo, {bool thumb = true}) async {
    final baseUrl = await getBaseUrl();
    if (baseUrl == null || baseUrl.isEmpty) return null;
    final suffix = thumb ? '/thumb' : '';
    return '$baseUrl/rest/articoli/image$suffix/$codArticolo';
  }
}