openfoodfacts 3.5.0

Dart package for the Open Food Facts API, a food products database made by everyone, for everyone.

example/lib/main.dart

import 'dart:async';

import 'package:openfoodfacts/openfoodfacts.dart';

/// request a product from the OpenFoodFacts database
Future<Product?> getProduct() async {
  var barcode = '0048151623426';

  final ProductQueryConfiguration configuration = ProductQueryConfiguration(
    barcode,
    language: OpenFoodFactsLanguage.GERMAN,
    fields: [ProductField.ALL],
    version: ProductQueryVersion.v3,
  );
  final ProductResultV3 result =
      await OpenFoodAPIClient.getProductV3(configuration);

  if (result.status == ProductResultV3.statusSuccess) {
    return result.product;
  } else {
    throw Exception('product not found, please insert data for $barcode');
  }
}

/// add a new product to the OpenFoodFacts database
void addNewProduct() async {
  // define the product to be added.
  // more attributes available ...
  Product myProduct = Product(
    barcode: '0048151623426',
    productName: 'Maryland Choc Chip',
  );

  // a registered user login for https://world.openfoodfacts.org/ is required
  User myUser = User(userId: '[e-mail]', password: 'password');

  // query the OpenFoodFacts API
  Status result = await OpenFoodAPIClient.saveProduct(myUser, myProduct);

  if (result.status != 1) {
    throw Exception('product could not be added: ${result.error}');
  }
}

/// add a new image for an existing product of the OpenFoodFacts database
void addProductImage() async {
  // define the product image
  // set the uri to the local image file
  // choose the "imageField" as location / description of the image content.
  SendImage image = SendImage(
    lang: OpenFoodFactsLanguage.ENGLISH,
    barcode: '0048151623426',
    imageField: ImageField.INGREDIENTS,
    imageUri: Uri.parse('Path to you image'),
  );

  // a registered user login for https://world.openfoodfacts.org/ is required
  User myUser = User(userId: '[e-mail]', password: 'password');

  // query the OpenFoodFacts API
  Status result = await OpenFoodAPIClient.addProductImage(myUser, image);

  if (result.status != 'status ok') {
    throw Exception(
        'image could not be uploaded: ${result.error} ${result.imageId.toString()}');
  }
}

/// Extract the ingredients of an existing product of the OpenFoodFacts database
/// That has already ingredient image
/// Otherwise it should be added first to the server and then this can be called
Future<String?> extractIngredient() async {
  // a registered user login for https://world.openfoodfacts.org/ is required
  User myUser = User(userId: '[e-mail]', password: 'password');

  // query the OpenFoodFacts API
  OcrIngredientsResult response = await OpenFoodAPIClient.extractIngredients(
      myUser, '0041220576920', OpenFoodFactsLanguage.ENGLISH);

  if (response.status != 0) {
    throw Exception("Text can't be extracted.");
  }
  return response.ingredientsTextFromImage;
}

/// Extract the ingredients of an existing product of the OpenFoodFacts database
/// That does not have ingredient image
/// And then save it back to the OFF server
void saveAndExtractIngredient() async {
  // a registered user login for https://world.openfoodfacts.org/ is required
  User myUser = User(userId: '[e-mail]', password: 'password');

  SendImage image = SendImage(
    lang: OpenFoodFactsLanguage.FRENCH,
    barcode: '3613042717385',
    imageField: ImageField.INGREDIENTS,
    imageUri: Uri.parse('Path to your image'),
  );

  //Add the ingredients image to the server
  Status results = await OpenFoodAPIClient.addProductImage(myUser, image);

  if (results.status == null) {
    throw Exception('Adding image failed');
  }

  OcrIngredientsResult ocrResponse = await OpenFoodAPIClient.extractIngredients(
      myUser, '3613042717385', OpenFoodFactsLanguage.FRENCH);

  if (ocrResponse.status != 0) {
    throw Exception("Text can't be extracted.");
  }

  // Save the extracted ingredients to the product on the OFF server
  results = await OpenFoodAPIClient.saveProduct(
      myUser,
      Product(
          barcode: '3613042717385',
          ingredientsText: ocrResponse.ingredientsTextFromImage));

  if (results.status != 1) {
    throw Exception('product could not be added');
  }

  //Get The saved product's ingredients from the server
  final ProductQueryConfiguration configurations = ProductQueryConfiguration(
    '3613042717385',
    language: OpenFoodFactsLanguage.FRENCH,
    fields: [
      ProductField.INGREDIENTS_TEXT,
    ],
    version: ProductQueryVersion.v3,
  );
  final ProductResultV3 productResult = await OpenFoodAPIClient.getProductV3(
    configurations,
    user: myUser,
  );

  if (productResult.status != ProductResultV3.statusSuccess) {
    throw Exception('product not found, please insert data for 3613042717385');
  }
}

/// Get suggestion based on:
/// Your user input
/// The preference language
/// The TagType
void getSuggestions() async {
  // The result will be a List<dynamic> that can be parsed
  await OpenFoodAPIClient.getSuggestions(TagType.COUNTRIES,
      input: 'Tun', language: OpenFoodFactsLanguage.FRENCH);
}