VPR-Projekt/src/GeneralMethods.java

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;

/**GeneralMethods is a class for commen public methods.
 *
 * @auhtor Felix Wöstemeyer
 *
 * @version 1.0
 */
public class GeneralMethods {

    /**The method readData gives back an ArrayList from the data of a given file.
     *
     * @param pathRead the given filepath to read
     * @return returns an ArrayList of Strings with the read data
     */
    public static ArrayList<String> readData(String pathRead){
        try {
            ArrayList<String> data = new ArrayList<String>();
            List<String> lines = Files.readAllLines(Paths.get(pathRead));
            for(String line : lines){
                data.add(line);
            }
            return data;
        } catch (IOException e) {
            e.printStackTrace();
            return new ArrayList<String>();
        }
    }

    /**The method writeData saves the given data to a certain file.
     *
     * @param pathWrite the given filepath to write
     * @param data the data to be saved
     */
    public static void writeData(String pathWrite, ArrayList<String> data){
        try{
            BufferedWriter writer = new BufferedWriter(new FileWriter(pathWrite));
            for (String d : data) {
                writer.write(d);
                writer.newLine();
            }
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Folgender Code von Sabine, zum gegen prüfen und entscheiden
     */
    /**
     * The method read Data interprets a file and returns an useable list for other methods.
     * Files to be read have to use : as a divider between attributes
     *
     * @param pathRead determines the filename of the file that will be read
     * @return menueList, userList, orderList depending on Data read
     */
    public ArrayList<String> readData2(String pathRead) {
        Path path = Paths.get(pathRead);

        try {
            List<String> rows = Files.readAllLines(path);

            if (pathRead == "menue.csv") {
                ArrayList<String> menueList = new ArrayList<>();

                for (String row : rows) {
                    String[] parts = row.split(":");

                    String day = parts[0];
                    String date = parts[1];
                    String meat = parts[2];
                    String vegi = parts[3];
                    String vegan = parts[4];
                    String desert1 = parts[5];
                    String desert2 = parts[6];
                    menueList.add(day + "," + date + "," + meat + "," + vegi + "," + vegan + "," + desert1 + "," + desert2);
                }
                return menueList;

            } else if (pathRead == "users.csv") {
                ArrayList<String> userList = new ArrayList<>();

                for (String row : rows) {
                    String[] parts = row.split(":");

                    String nameParent1 = parts[0];
                    String nameParent2 = parts[1];
                    String billAddress = parts[2];
                    String phonenumber = parts[3];
                    String nameChildren = parts[4];
                }
                return userList;

            } else if (pathRead == "orders.csv") {
                ArrayList<String> orderList = new ArrayList<>();

                for (String row : rows) {
                    String[] parts = row.split(":");

                    String date = parts[0];
                    String meat = parts[1];
                    String meatCount = parts[2];
                    String vegi = parts[3];
                    String vegiCount = parts[4];
                    String vegan = parts[5];
                    String veganCount = parts[6];
                    String desert1 = parts[7];
                    String desert1Count = parts[8];
                    String desert2 = parts[9];
                    String desert2Count = parts[10];
                }
                return orderList;

            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }


    /**
     * The method writeData writes the data of a List into a txt file.
     * @param pathWrite determines the filename of the file that will be written
     * @param listToWrite determines which ArrayList is to be used for writing the file
     */
    public void writeData2 (String pathWrite, ArrayList<String> listToWrite){
        if (pathWrite == "users.txt") {

        } else if (pathWrite == "orders.txt") {

        }
    }
}