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450 lines
14 KiB
Dart
450 lines
14 KiB
Dart
/*
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* This file is part of wger Workout Manager <https://github.com/wger-project>.
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* Copyright (C) 2020, 2021 wger Team
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*
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* wger Workout Manager is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import 'dart:convert';
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import 'dart:developer';
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import 'package:flutter/material.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'package:wger/exceptions/http_exception.dart';
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import 'package:wger/exceptions/no_such_entry_exception.dart';
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import 'package:wger/helpers/consts.dart';
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import 'package:wger/models/exercises/ingredient_api.dart';
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import 'package:wger/models/nutrition/image.dart';
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import 'package:wger/models/nutrition/ingredient.dart';
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import 'package:wger/models/nutrition/log.dart';
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import 'package:wger/models/nutrition/meal.dart';
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import 'package:wger/models/nutrition/meal_item.dart';
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import 'package:wger/models/nutrition/nutritional_plan.dart';
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import 'package:wger/providers/base_provider.dart';
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class NutritionPlansProvider with ChangeNotifier {
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static const _nutritionalPlansPath = 'nutritionplan';
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static const _nutritionalPlansInfoPath = 'nutritionplaninfo';
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static const _mealPath = 'meal';
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static const _mealItemPath = 'mealitem';
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static const _ingredientPath = 'ingredient';
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static const _ingredientSearchPath = 'ingredient/search';
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static const _nutritionDiaryPath = 'nutritiondiary';
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static const _ingredientImagePath = 'ingredient-image';
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final WgerBaseProvider baseProvider;
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List<NutritionalPlan> _plans = [];
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List<Ingredient> _ingredients = [];
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NutritionPlansProvider(this.baseProvider, List<NutritionalPlan> entries) : _plans = entries;
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List<NutritionalPlan> get items {
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return [..._plans];
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}
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set ingredients(items) {
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_ingredients = items;
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}
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/// Clears all lists
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void clear() {
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_plans = [];
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_ingredients = [];
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}
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/// Returns the current active nutritional plan. At the moment this is just
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/// the latest, but this might change in the future.
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NutritionalPlan? get currentPlan {
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if (_plans.isNotEmpty) {
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return _plans.first;
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}
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return null;
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}
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NutritionalPlan findById(int id) {
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return _plans.firstWhere(
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(plan) => plan.id == id,
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orElse: () => throw const NoSuchEntryException(),
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);
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}
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Meal? findMealById(int id) {
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for (final plan in _plans) {
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try {
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final meal = plan.meals.firstWhere((plan) => plan.id == id);
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return meal;
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} on StateError {}
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}
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return null;
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}
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/// Fetches and sets all plans sparsely, i.e. only with the data on the plan
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/// object itself and no child attributes
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Future<void> fetchAndSetAllPlansSparse() async {
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final data = await baseProvider.fetchPaginated(
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baseProvider.makeUrl(_nutritionalPlansPath, query: {'limit': '1000'}),
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);
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_plans = [];
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for (final planData in data) {
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final plan = NutritionalPlan.fromJson(planData);
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_plans.add(plan);
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_plans.sort((a, b) => b.creationDate.compareTo(a.creationDate));
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}
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notifyListeners();
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}
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/// Fetches and sets all plans fully, i.e. with all corresponding child objects
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Future<void> fetchAndSetAllPlansFull() async {
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final data = await baseProvider.fetchPaginated(baseProvider.makeUrl(_nutritionalPlansPath));
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await Future.wait(data.map((e) => fetchAndSetPlanFull(e['id'])).toList());
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}
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/// Fetches and sets the given nutritional plan
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///
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/// This method only loads the data on the nutritional plan object itself,
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/// no meals, etc.
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Future<NutritionalPlan> fetchAndSetPlanSparse(int planId) async {
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final url = baseProvider.makeUrl(_nutritionalPlansPath, id: planId);
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final planData = await baseProvider.fetch(url);
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final plan = NutritionalPlan.fromJson(planData);
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_plans.add(plan);
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_plans.sort((a, b) => b.creationDate.compareTo(a.creationDate));
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notifyListeners();
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return plan;
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}
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/// Fetches a plan fully, i.e. with all corresponding child objects
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Future<NutritionalPlan> fetchAndSetPlanFull(int planId) async {
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NutritionalPlan plan;
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try {
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plan = findById(planId);
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} on NoSuchEntryException {
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plan = await fetchAndSetPlanSparse(planId);
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}
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// Plan
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final url = baseProvider.makeUrl(_nutritionalPlansInfoPath, id: planId);
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final fullPlanData = await baseProvider.fetch(url);
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// Meals
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final List<Meal> meals = [];
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for (final mealData in fullPlanData['meals']) {
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final List<MealItem> mealItems = [];
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final meal = Meal.fromJson(mealData);
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for (final mealItemData in mealData['meal_items']) {
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final mealItem = MealItem.fromJson(mealItemData);
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final ingredient = Ingredient.fromJson(mealItemData['ingredient_obj']);
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if (mealItemData['image'] != null) {
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final image = IngredientImage.fromJson(mealItemData['image']);
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ingredient.image = image;
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}
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mealItem.ingredient = ingredient;
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mealItems.add(mealItem);
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}
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meal.mealItems = mealItems;
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meals.add(meal);
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}
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plan.meals = meals;
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// Logs
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await fetchAndSetLogs(plan);
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for (final meal in meals) {
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meal.diaryEntries = plan.diaryEntries.where((e) => e.mealId == meal.id).toList();
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}
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// ... and done
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notifyListeners();
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return plan;
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}
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Future<NutritionalPlan> addPlan(NutritionalPlan planData) async {
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final data = await baseProvider.post(
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planData.toJson(),
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baseProvider.makeUrl(_nutritionalPlansPath),
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);
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final plan = NutritionalPlan.fromJson(data);
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_plans.add(plan);
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_plans.sort((a, b) => b.creationDate.compareTo(a.creationDate));
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notifyListeners();
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return plan;
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}
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Future<void> editPlan(NutritionalPlan plan) async {
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await baseProvider.patch(
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plan.toJson(),
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baseProvider.makeUrl(_nutritionalPlansPath, id: plan.id),
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);
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notifyListeners();
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}
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Future<void> deletePlan(int id) async {
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final existingPlanIndex = _plans.indexWhere((element) => element.id == id);
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final existingPlan = _plans[existingPlanIndex];
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_plans.removeAt(existingPlanIndex);
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notifyListeners();
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final response = await baseProvider.deleteRequest(_nutritionalPlansPath, id);
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if (response.statusCode >= 400) {
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_plans.insert(existingPlanIndex, existingPlan);
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notifyListeners();
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throw WgerHttpException(response.body);
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}
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//existingPlan = null;
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}
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/// Adds a meal to a plan
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Future<Meal> addMeal(Meal meal, int planId) async {
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final plan = findById(planId);
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final data = await baseProvider.post(
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meal.toJson(),
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baseProvider.makeUrl(_mealPath),
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);
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meal = Meal.fromJson(data);
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plan.meals.add(meal);
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notifyListeners();
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return meal;
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}
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/// Edits an existing meal
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Future<Meal> editMeal(Meal meal) async {
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final data = await baseProvider.patch(
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meal.toJson(),
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baseProvider.makeUrl(_mealPath, id: meal.id),
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);
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meal = Meal.fromJson(data);
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notifyListeners();
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return meal;
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}
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/// Deletes a meal
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Future<void> deleteMeal(Meal meal) async {
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// Get the meal
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final plan = findById(meal.planId);
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final mealIndex = plan.meals.indexWhere((e) => e.id == meal.id);
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final existingMeal = plan.meals[mealIndex];
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plan.meals.removeAt(mealIndex);
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notifyListeners();
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// Try to delete
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final response = await baseProvider.deleteRequest(_mealPath, meal.id!);
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if (response.statusCode >= 400) {
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plan.meals.insert(mealIndex, existingMeal);
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notifyListeners();
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throw WgerHttpException(response.body);
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}
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}
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/// Adds a meal item to a meal
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Future<MealItem> addMealItem(MealItem mealItem, Meal meal) async {
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final data = await baseProvider.post(
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mealItem.toJson(),
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baseProvider.makeUrl(_mealItemPath),
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);
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mealItem = MealItem.fromJson(data);
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mealItem.ingredient = await fetchIngredient(mealItem.ingredientId);
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meal.mealItems.add(mealItem);
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notifyListeners();
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return mealItem;
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}
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/// Deletes a meal
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Future<void> deleteMealItem(MealItem mealItem) async {
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// Get the meal
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final meal = findMealById(mealItem.mealId)!;
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final mealItemIndex = meal.mealItems.indexWhere((e) => e.id == mealItem.id);
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final existingMealItem = meal.mealItems[mealItemIndex];
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meal.mealItems.removeAt(mealItemIndex);
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notifyListeners();
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// Try to delete
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final response = await baseProvider.deleteRequest(_mealItemPath, mealItem.id!);
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if (response.statusCode >= 400) {
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meal.mealItems.insert(mealItemIndex, existingMealItem);
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notifyListeners();
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throw WgerHttpException(response.body);
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}
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}
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/// Fetch and return an ingredient
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///
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/// If the ingredient is not known locally, it is fetched from the server
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Future<Ingredient> fetchIngredient(int ingredientId) async {
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Ingredient ingredient;
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try {
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ingredient = _ingredients.firstWhere((e) => e.id == ingredientId);
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return ingredient;
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// Get ingredient from the server and save to cache
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} on StateError {
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final data = await baseProvider.fetch(
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baseProvider.makeUrl(_ingredientPath, id: ingredientId),
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);
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ingredient = Ingredient.fromJson(data);
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_ingredients.add(ingredient);
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final prefs = await SharedPreferences.getInstance();
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final ingredientData = json.decode(prefs.getString(PREFS_INGREDIENTS)!);
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ingredientData['ingredients'].add(ingredient.toJson());
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prefs.setString(PREFS_INGREDIENTS, json.encode(ingredientData));
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log("Saved ingredient '${ingredient.name}' to cache.");
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return ingredient;
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}
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}
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/// Loads the available ingredients from the local storage
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Future<void> fetchIngredientsFromCache() async {
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// Load exercises from cache, if available
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final prefs = await SharedPreferences.getInstance();
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if (prefs.containsKey(PREFS_INGREDIENTS)) {
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final ingredientData = json.decode(prefs.getString(PREFS_INGREDIENTS)!);
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if (DateTime.parse(ingredientData['expiresIn']).isAfter(DateTime.now())) {
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ingredientData['ingredients'].forEach((e) => _ingredients.add(Ingredient.fromJson(e)));
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log("Read ${ingredientData['ingredients'].length} ingredients from cache. Valid till ${ingredientData['expiresIn']}");
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return;
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}
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}
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// Initialise an empty cache
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final ingredientData = {
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'date': DateTime.now().toIso8601String(),
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'expiresIn': DateTime.now().add(const Duration(days: DAYS_TO_CACHE)).toIso8601String(),
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'ingredients': [],
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};
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prefs.setString(PREFS_INGREDIENTS, json.encode(ingredientData));
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}
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/// Searches for an ingredient
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Future<List<IngredientApiSearchEntry>> searchIngredient(
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String name, {
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String languageCode = 'en',
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bool searchEnglish = false,
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}) async {
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if (name.length <= 1) {
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return [];
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}
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final languages = [languageCode];
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if (searchEnglish && languageCode != LANGUAGE_SHORT_ENGLISH) {
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languages.add(LANGUAGE_SHORT_ENGLISH);
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}
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// Send the request
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final response = await baseProvider.fetch(
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baseProvider.makeUrl(
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_ingredientSearchPath,
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query: {'term': name, 'language': languages.join(',')},
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),
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);
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// Process the response
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return IngredientApiSearch.fromJson(response).suggestions;
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}
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/// Searches for an ingredient with code
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Future<Ingredient?> searchIngredientWithCode(String code) async {
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if (code.isEmpty) {
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return null;
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}
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// Send the request
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final data = await baseProvider.fetch(
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baseProvider.makeUrl(_ingredientPath, query: {'code': code}),
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);
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if (data['count'] == 0) {
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return null;
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} else {
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return Ingredient.fromJson(data['results'][0]);
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}
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}
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/// Log meal to nutrition diary
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Future<void> logMealToDiary(Meal meal) async {
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for (final item in meal.mealItems) {
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final plan = findById(meal.planId);
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final Log log = Log.fromMealItem(item, plan.id!, meal.id);
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final data = await baseProvider.post(
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log.toJson(),
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baseProvider.makeUrl(_nutritionDiaryPath),
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);
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log.id = data['id'];
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plan.diaryEntries.add(log);
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}
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notifyListeners();
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}
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/// Log custom ingredient to nutrition diary
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Future<void> logIngredientToDiary(
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MealItem mealItem,
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int planId, [
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DateTime? dateTime,
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]) async {
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final plan = findById(planId);
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mealItem.ingredient = await fetchIngredient(mealItem.ingredientId);
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final Log log = Log.fromMealItem(mealItem, plan.id!, null, dateTime);
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final data = await baseProvider.post(
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log.toJson(),
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baseProvider.makeUrl(_nutritionDiaryPath),
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);
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log.id = data['id'];
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plan.diaryEntries.add(log);
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notifyListeners();
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}
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/// Deletes a log entry
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Future<void> deleteLog(int logId, int planId) async {
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await baseProvider.deleteRequest(_nutritionDiaryPath, logId);
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final plan = findById(planId);
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plan.diaryEntries.removeWhere((element) => element.id == logId);
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notifyListeners();
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}
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/// Load nutrition diary entries for plan
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Future<void> fetchAndSetLogs(NutritionalPlan plan) async {
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final data = await baseProvider.fetchPaginated(
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baseProvider.makeUrl(
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_nutritionDiaryPath,
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query: {
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'plan': plan.id.toString(),
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'limit': '999',
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'ordering': 'datetime',
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},
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),
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);
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plan.diaryEntries = [];
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for (final logData in data) {
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final log = Log.fromJson(logData);
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final ingredient = await fetchIngredient(log.ingredientId);
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log.ingredient = ingredient;
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plan.diaryEntries.add(log);
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}
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notifyListeners();
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}
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}
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