/*
 * Read a text file into an array of Teacher objects
 * Writes to a text file the date time of when the program was run
 */
package readingfromatextfile;

/**
 *
 * @author seilertsen
 */
public class ReadingUI {
    
    public static void main(String[]args) {
        
        ReadingManager rm = new ReadingManager();
        String allTeachers = "";
        System.out.println("Teachers Array");
        System.out.println("======================================");
        allTeachers = rm.displayAll();
        System.out.println(allTeachers);
        System.out.println("hello main method");
    } // end main method
    
} // end class

=====================================================================================
/*
 * Using the method "split" to break a line into tokens
 * The use of split places each token in the line into an indexed String array
 * Use parse to save each token into its correct datatype.
 * Create a singly stand-alone object - then copy the single object into an
 * array of objects.
 *
 * This version appends the date time to a login file using PrintWriter.
 * 
 */
package readingfromatextfile;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.time.LocalDateTime;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author seilertsen
 */
public class ReadingManager {
    
    // global variables
    private Teachers[] tArr = new Teachers[50];
    private String[] tokens = null;
    private int size = 0;
    private boolean certified = false;
    private PrintWriter pw = null;
    private LocalDateTime dt = null;
    
    // Constructor method
	// We need IOException in case writting to the file is not possible
    public ReadingManager()throws IOException {
        
        try {
            // Link to the text file
            Scanner scFile = new Scanner(new File("myTextFile.txt"));
            System.out.println("File found.\n");
            // Create the Login file to write to
			// Parameter "true" appends to the end of the file
            pw = new PrintWriter(new FileWriter("LoginTimes.txt",true));
            
            // name, year, certified, donation;
            while(scFile.hasNextLine()){
                // Read in the whole line before breaking it into tokens
                String line = scFile.nextLine();
                
                // Using the delimiter "#" the line is broken up into tokens
                // Each token is automatically placed into the next index of
                // the String array
                tokens = line.split("#");
                String fullName = tokens[0];
                
                String yearSt = tokens[1];
                // The Strings need to be parsed to their correct datatype
                int year = Integer.parseInt(yearSt);
                
                // There is no parse method for boolean
                if(tokens[2].equals("true"))
                    certified = true;
                else if (tokens[2].equals("false"))
                    certified = false;
                else
                        System.out.println("Error");
                
                String donationSt = tokens[3];
                double donation = Double.parseDouble(donationSt);
                
                // Create the single stand alone object
                Teachers t = new Teachers(fullName, year, certified, donation);
                
                // Copy the stand alone object into the next index of the array
                tArr[size] = t;
                
                // increase the counter
                size++;
                
                
            } // end while
            
            // Record the date time of the login event
            dt = LocalDateTime.now();
            System.out.println("date time: " + dt);
            
            //Parse date time to Sting and write to login file
            pw.println("" + "Event@Login" + "@" + dt);
            pw.close();
            
        } catch (FileNotFoundException ex) {
            Logger.getLogger(ReadingManager.class.getName()).log(Level.SEVERE, null, ex);
            System.out.println("File not found");
        }
            
    } // end constructor
    
    public String displayAll(){
        
        // The format of displayAll is determined by the toString method
        // in the Teacher class
        
        String all = "";
        
        for(int x = 0; x < size; x++) {
            all = all + tArr[x];
        }
        
        return all;
    } // end displayAll
    
} // end Teacher Manager class


====================================================================================================

/*
 * Template class for Teacher objects
 * The format of the output is controlled by the structore of the toString 
 * method.
 */
package readingfromatextfile;

/**
 *
 * @author seilertsen
 */
public class Teachers {
    
    String name = null;
    int year = 0;
    boolean certified = false;
    double donation = 0.0;
    
    public Teachers(String n, int y, boolean c, double d){
        name = n;
        year = y;
        certified = c;
        donation = d;
    }
    
    @Override
    public String toString(){
        
        // The default toString is overrideen by this custom version offering
        // the tokens in a different order to the text file
        return donation + "\t" + name + "\t" + year + "\t" + certified + "\n";
        
    } // toString
    
} // end class

===========================================================================================

TEXT File - INPUT

Steve Eilertsen#1956#false#23.4
Andy Alpha#1987#true#45.7
Betta Bravo#1999#false#12.37
Chunky Charlie#2004#true#56.87
David Delta#2008#true#48.17

============================================================================================

TEXT FILE - OUTPUT

Event@Login@2024-09-16T13:02:39.337369300
Event@Login@2024-09-16T13:05:53.232936500
Event@Login@2024-09-16T13:06:05.223731
Event@Login@2024-09-16T13:06:10.632609200
Event@Login@2024-09-16T13:06:16.147052100
Event@Login@2024-09-16T13:06:35.629899200
Event@Login@2024-09-16T13:06:40.715483800
Event@Login@2024-09-16T13:25:25.835277900


==========================================================================================

OUTPUT TO THE MONITOR

run:
File found.

date time: 2024-09-14T08:57:11.172312900
Teachers Array
======================================
23.4	Steve Eilertsen	1956	false
45.7	Andy Alpha	1987	true
12.37	Betta Bravo	1999	false
56.87	Chunky Charlie	2004	true
48.17	David Delta	2008	true

hello main method
BUILD SUCCESSFUL (total time: 0 seconds)