Essensbestellungsverwaltung/src/main/java/com/bib/essensbestellungsverwaltung/FoodMgr.java

package com.bib.essensbestellungsverwaltung;
/*
    @author Malte Schulze Hobeling
 */

import java.util.ArrayList;
import java.util.List;


public class FoodMgr {
    /**
     * inserts a food int to the database and creates the food_restriction entries
     * @return id of food or -1
     */
    public static long createFood(Food food){
        String[] foodH = {"name","description","isDessert","food_typeid"};
        String[] food_restrictionH = {"foodid","allergyid"};
        String[] foodD = {food.getName(),food.getDescription(),(food.isDessert() ? "1" : "0"), String.valueOf(food.getFoodType().getId())};
        long id = Database.insert("food",foodH,foodD);
        if(food.getAllergies().size() > 0){
            String sId = String.valueOf(id);
            for (Allergy allergy : food.getAllergies()) {
                String[] food_restrictionD = {sId, String.valueOf(allergy.getId())};
                Database.insert("food_restriction",food_restrictionH, food_restrictionD);
            }
        }
        return id;
    }

    /**
     * inserts a food_plan into the database
     * @param food_planData date[YYYY-MM-DD], foodid[vegan], foodid, foodid[dessert,vegan], foodid[dessert]
     * @return id of food_plan or -1
     */
    public static long createFood_plan(String[] food_planData){
        String[] food_planH = {"date","food1","food2","dessert1","dessert2"};
        return Database.insert("food_plan",food_planH,food_planData);
    }

    /**
     * returns all non desserts or all desserts
     * @param isDessert true for only desserts false for non desserts
     * @return a list of all non desserts or all desserts
     */
    public static List<Food> getFood(boolean isDessert){
        String[] foodH = {"isDessert"};
        String[] foodD = {(isDessert ? "1" : "0")};
        List<String> entries = Database.select("food",foodH,foodD);
        List<Food> foods = new ArrayList<>();
        for (String entry : entries) {
            String[] parts = entry.split(":");
            foods.add(getFoodById(Long.parseLong(parts[0])));
        }
        return foods;
    }

    /**
     * getFood but returns only vegan food
     * @param isDessert true for only desserts false for non desserts
     * @return a list of all vegan non desserts or all vegan desserts
     */
    public static List<Food> getVeganFood(boolean isDessert){
        String[] foodH = {"isDessert","food_typeid"};
        String[] foodD = {(isDessert ? "1" : "0"),"1"};
        List<String> entries = Database.select("food",foodH,foodD);
        List<Food> foods = new ArrayList<>();
        for (String entry : entries) {
            String[] parts = entry.split(":");
            foods.add(getFoodById(Long.parseLong(parts[0])));
        }
        return foods;
    }

    /**
     * returns a food_plan for a day
     * @param date YYYY-MM-DD one day
     * @return food_plan for date
     */
    public static List<String> getFood_plan(String date){
        String[] food_planH = {"date"};
        String[] food_planD = {date};
        return Database.select("food_plan",food_planH,food_planD);
    }

    public static Food getFoodById(long id){
        List<String> entry = Database.getEntryById("food",id);
        String[] parts = entry.get(0).split(":");
        String name = parts[1];
        String description = parts[2];
        boolean isDessert;
        isDessert = parts[3].equals("0");
        FoodType foodType = getFoodTypeById(Long.parseLong(parts[4]));
        List<Allergy> allergies = getAllergies(id);
        return new Food(id,name,description,isDessert,foodType,allergies);
    }

    public static FoodType getFoodTypeById(long id){
        List<String> entry = Database.getEntryById("foodtype",id);
        String[] typeParts = entry.get(0).split(":");
        return new FoodType(Long.parseLong(typeParts[0]),typeParts[1]);
    }

    public static Allergy getAllergyById(long id){
        String[] allergyH = {"id"};
        String[] allergyD = {String.valueOf(id)};
        List<String> allergies = Database.select("allergy",allergyH,allergyD);
        String[] allergyParts = allergies.get(0).split(":");
        return new Allergy(id,allergyParts[1],allergyParts[2]);
    }

    public static List<Allergy> getAllergies(long foodId){
        List<Allergy> allergies = new ArrayList<>();
        String[] restrictionsH = {"foodid"};
        String[] restrictionsD = {String.valueOf(foodId)};
        List<String> restrictions = Database.select("food_restrictions",restrictionsH,restrictionsD);
        for (String restriction : restrictions) {
            String[] partsRestrictions = restriction.split(":");
            allergies.add(getAllergyById(Long.parseLong(partsRestrictions[2])));
        }
        return allergies;
    }

    /**
     * inserts the selected food into food_Selection if the food_plan has not been sent
     * @param food_selectionData childid, food_planid, foodid
     * @return id or -1
     */
    public static long createFood_selection(String[] food_selectionData){
        String[] food_selectionH = {"childid","food_planid","foodid"};
        List<String> food_plan = Database.getEntryById("food_plan",Long.parseLong(food_selectionData[1]));
        String[] food_planParts = food_plan.get(0).split(":");
        if(Long.parseLong(food_planParts[6]) == 0){
            return Database.insert("food_selection",food_selectionH,food_selectionData);
        }else {
            return -1;
        }
    }

    /**
     * accumulates the selected food for a given day and locks the corresponding food_plan
     * @param date YYYY-MM-DD day
     * @return the accumulated orders
     */
    public static List<String> getDayOrder(String date){
        List<String> orders = new ArrayList<>();
        List<String> food_plan = getFood_plan(date);
        String[] food_planParts = food_plan.get(0).split(":");
        for(int i = 2; i < 2+4; i++){
            Food food = getFoodById(Long.parseLong(food_planParts[i]));
            String foodName = food.getName();
            String[] food_selectionH = {"food_planid","foodid"};
            String[] food_selectionD = {food_planParts[0], String.valueOf(food.getId())};
            int count = Database.count("food_selection",food_selectionH,food_selectionD);
            orders.add(foodName+":"+count);
        }
        String[] updateH = {"id","issent"};
        String[] updateD = {food_planParts[0],"1"};
        if(Database.update("food_plan",updateH,updateD) < 0){
            System.out.println("Fehler");
        }
        return orders;
    }
}