TravProfDB.java

import java.io.*;
import java.nio.charset.StandardCharsets;


public class TravProfDB {
    public int numTravelers, currentTravelerIndex;
    public String fileName;
    private TravProf[] travelerList = new TravProf[10];

    /* old solution that did not work well
    import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;


public class TravProfDB {
    private int numTravelers;
    private int currentTravelerIndex;
    private String fileName;
    public TravProf[] travelerList;

    //This is a constructor method which accepts the name of the file in which the traveler
    //profiles will be stored. Thus, for the ITS system in its current version, the database of TravProf is
    //implemented using a file.``
    public TravProfDB(String fileName){
        this.fileName = fileName;
        numTravelers = 0;
        currentTravelerIndex = 0;
        travelerList = new TravProf[0];
    }

    //This method accepts a TravProf as input and inserts it into the array travelerList
    public void insertNewProfile(TravProf travProf){
        TravProf[] newTravelerList = new TravProf[travelerList.length+1];
        if(travelerList.length == 0){
            newTravelerList[0] = travProf;
        } else {
            for (int i = 0; i < newTravelerList.length-1; i++) {
                newTravelerList[i] = travelerList[i];
            }
            newTravelerList[travelerList.length] = travProf;
        }
        travelerList = newTravelerList;
        numTravelers = travelerList.length;
    }

    //This method accepts the travAgentID and lastName as inputs and returns the
    //corresponding traveler profile as output.
    public TravProf findProfile(String travAgentID, String lastName){
        TravProf travProf = null;
        for (int i = 0; i < travelerList.length; i++) {
                if(travelerList[i].getLastName() == lastName && travelerList[i].getTravAgentID() == travAgentID){
                    travProf = travelerList[i];
            }
        }
        return travProf;
    }

    //This method accepts the travAgentID and lastName as inputs and deletes
    //the corresponding traveler profile. It returns a boolean value to indicate whether the delete operation
    //was successful.
    public boolean deleteProfile(String travAgentID, String lastName){
        if(travelerList.length == 0){
            return false;
        } else if (travelerList.length == 1){
            numTravelers = 0;
            travelerList = new TravProf[0];
            return true;
        }
        TravProf[] newTravelerList = new TravProf[travelerList.length-1];
        boolean found = false;
        int i;
        for (i = 0; i < newTravelerList.length; i++) {
            if (travelerList[i].getLastName() == lastName && travelerList[i].getTravAgentID() == travAgentID) {
                i++;
                for (int j = i-1; j < newTravelerList.length; j++) {
                    newTravelerList[j] = travelerList[i];
                    i++;
                }
                travelerList = newTravelerList;
                numTravelers = travelerList.length;
                currentTravelerIndex = 0;
                return true;
            }
            newTravelerList[i] = travelerList[i];
        }
        return false;
    }

    //Returns first profile in the DB.
    public TravProf findFirstProfile(){
        return travelerList[0];
    }

    //This method writes all TravProf stored in the array travelerList to a
    //file. Argument is a filename. E.x. "ExampleDB.txt".
    public void writeAllTravProf(String fileName){
        try {
            FileOutputStream outputStream = new FileOutputStream(fileName);
            for (int i = 0; i < travelerList.length; i++) {
                String line = travelerList[i].toString() + "\n";
                byte[] strToBytes = line.getBytes();
                outputStream.write(strToBytes);
            }
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    }



}

     */
    public TravProfDB(String newfileName){
        //new DB

        fileName = newfileName;

        File file = new File(fileName);
    }

    //new profile
    public void insertNewProfile(TravProf newProfile){
        TravProf newarr[] = new TravProf[numTravelers + 1];

        for(int i = 0; i < numTravelers; i++){
            newarr[i] = travelerList[i];
        }

        newarr[numTravelers] = newProfile;
        travelerList = newarr;
        numTravelers++;
    }

    /*find profile
    //Iterates through the profiles in the DB using the travelerIndex as an index
    //and the numTravelers as a max to loop to 0.
    public TravProf findNextProfile(){
        if(numTravelers == 0){
            System.out.println("No travelers in the database!");
            return null;
        } else if(currentTravelerIndex >= numTravelers) {
            currentTravelerIndex = 1;
            return travelerList[0];
        } else {
            return travelerList[currentTravelerIndex++];
        }
        */
    public TravProf findProfile(String travAgentID, String lastName){
        for(int i = 0; i < numTravelers; i++){
            TravProf profile = travelerList[i];
            if(profile.gettravAgentID().equals(travAgentID) && profile.getLastName().equals(lastName)){
                return profile;
            }
        }
        return null;
    }

    //delete profile
    public boolean deleteProfile(String travAgentID, String lastname) {

        TravProf temp = findProfile(travAgentID, lastname);

        if(temp == null)
            return false;

        else {
            TravProf[] temptravelerList = new TravProf[travelerList.length - 1];
            //loop throughf
            for (int i = 0, j = 0; i < numTravelers; i++)
            {
                //if last name is the same
                if (!travelerList[i].getLastName().equals(lastname))

                {

                    temptravelerList[j++] = travelerList[i];
                }
            }
            travelerList = temptravelerList;
            numTravelers--;   //less travelers
            return true;      //return true
        }
    }

    //find first profile
    public TravProf findFirstProfile()
    {
        if(travelerList.length > 0)
        {
            currentTravelerIndex = 0;
            //return the first profile index 0
            return travelerList[0];
        }
        else
            return null;
    }

    public TravProf findNextProfile(){
        //find the next profile
        if(numTravelers > 0 && currentTravelerIndex < numTravelers - 1)
        {
            currentTravelerIndex++;
            return travelerList[currentTravelerIndex];
        }
        else
            return null;
    }

    //increase size of list
    private void increase(){
        TravProf[] newarr = new TravProf[travelerList.length + 10];

        for(int i = 0; i < numTravelers; i++){
            newarr[i] = travelerList[i];
        }

        travelerList = newarr;    //new array
    }
    public void WriteAllTravProf(String fileName) {
        try {
            FileOutputStream outputStream = new FileOutputStream(fileName);
            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream, StandardCharsets.UTF_8);
            BufferedWriter buff = new BufferedWriter(outputStreamWriter);
            for(int i = 0; i < numTravelers; i++){
                buff.write(travelerList[i].gettravAgentID());

                buff.newLine();

                buff.write(travelerList[i].getFirstName());

                buff.newLine();

                buff.write(travelerList[i].getLastName());

                buff.newLine();

                buff.write(travelerList[i].getAddress());

                buff.newLine();

                buff.write(travelerList[i].getPhone());

                buff.newLine();

                buff.write(travelerList[i].getTravelType());

                buff.newLine();

                buff.write(travelerList[i].getPaymentType());

                buff.newLine();

                buff.write(String.valueOf(travelerList[i].getTripCost()));
                buff.newLine();

                buff.write(travelerList[i].getMedCondInfo().getAlgType());

                buff.newLine();

                buff.write(travelerList[i].getMedCondInfo().getIllType());

                buff.newLine();

                buff.write(travelerList[i].getMedCondInfo().getMdContact());

                buff.newLine();

                buff.write(travelerList[i].getMedCondInfo().getMdPhone());

                buff.newLine();

                buff.newLine();
            }

            buff.write("~\n");
            buff.close();

        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }
/*
//This function should read traveler profiles from a file. The string argument might be filename or filepath.
    //This method is used to read in the existing traveler profiles placed in the file. Example Argument: "TestDB.txt".
    public void initializeDataBase(String fileName){
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(fileName), StandardCharsets.UTF_8));
            String line;

            while ((line = br.readLine()) != null) {
                String[] attributes = line.split("\t");
                insertNewProfile(new TravProf(attributes[0],attributes[1],attributes[2],attributes[3],attributes[4],Float.parseFloat(attributes[5]),attributes[6],attributes[7],new MedCond(attributes[8],attributes[9],attributes[10],attributes[11])));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 */
    public void initializeDatabase(String fileName){
        try{
            BufferedReader buff = new BufferedReader(new FileReader(fileName));
            numTravelers = 0;
            String line;

            while(!((line = buff.readLine()).equals("~")))
            {

                if(numTravelers == travelerList.length) {
                    increase();
                }

                String travAgentID, FirstName, LastName, Address, Phone, TravelType, PaymentType,
                        AlgType, IllType, MdContact, MdPhone;
                float TripCost;

                travAgentID = line;
                line = buff.readLine();
                FirstName = line;

                line = buff.readLine();
                LastName = line;

                line = buff.readLine();
                Address = line;

                line = buff.readLine();
                Phone = line;

                line = buff.readLine();
                TravelType = line;

                line = buff.readLine();
                PaymentType = line;

                line = buff.readLine();
                TripCost = Float.parseFloat(line);

                line = buff.readLine();
                AlgType = line;

                line = buff.readLine();
                IllType = line;

                line = buff.readLine();
                MdContact = line;

                line = buff.readLine();
                MdPhone = line;

                line = buff.readLine();
                                        //create new instances for the database
                MedCond medprofile = new MedCond(AlgType, IllType, MdContact, MdPhone);
                TravProf profile = new TravProf(travAgentID, FirstName, LastName, Address, Phone, TravelType,
                                                PaymentType, TripCost, medprofile);

                travelerList[numTravelers] = profile;
                numTravelers++;
            }
            buff.close();
        }catch(IOException e) {
            e.printStackTrace();
        }
        currentTravelerIndex = 0;
    }
}