yasar_yagi_FavoriteMovies/Favorite_Movies/src/Database.java

import java.io.IOException;
import java.io.FileWriter;
import java.io.FileReader;
import java.io.File;
import java.util.Scanner;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.io.BufferedReader;

public class Database {

    public static boolean userExists(String username) 
    {
        boolean found = false;    

        try {
            File filex=new File("c:\\tmp\\FavoriteMovies\\files\\login_cred.txt");
            Scanner scan;
            scan = new Scanner(filex);

            scan.useDelimiter("[\n]");


            if(scan.hasNext() && !found ) {
                
                String line_ = scan.nextLine();
                
                if(line_.equals(username))
                    found = true;
            }
            scan.close();
        }
        catch (FileNotFoundException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

        return found;
    }

    private static void writeMovieToFile(FileWriter fw, Movie m) throws IOException
    {

        fw.write(String.valueOf(m.getMovieId())); 

        fw.append(" ").write(m.getTitle());

        fw.append(" ").write(String.valueOf(m.getYear()));
        
        fw.append(" ").write(String.valueOf(m.getLength()));
        
        fw.append(" ").write(m.getGenre());
        
        fw.append(" ").write(m.getStudioName());
        
        fw.append(" ").write(m.getProducerName()); 
        
        fw.append(" ").write(m.getShortDescription());
        
        fw.append(" ").write(String.valueOf(m.getAvgRating())); 
        
        fw.append(" ").write(String.valueOf(m.getNumWatched()));
        
        fw.write("\n");
    }

    public static void addMovie(Movie m){
        try {

            FileWriter fw = new FileWriter( "c:\\tmp\\src\\files\\data.txt",true); 
            
            writeMovieToFile(fw, m);

            fw.close();

        } 
        catch (IOException e1) { // TODO Auto-generated catch block
            e1.printStackTrace(); 
        }

    }

    public static ArrayList<Movie> getMovies()
    {
        ArrayList<Movie> list = new ArrayList<Movie>();
        try{
            FileReader fr = new FileReader( "C:\\tmp\\FavoriteMovies\\files\\data.txt");
            BufferedReader br = new BufferedReader(fr);
            String line = null;
            while ((line=br.readLine())!=null)
            {
                Movie m = Movie.parseString(line);
                list.add(m);
            }
        }
        catch (IOException e1) { // TODO Auto-generated catch block
            e1.printStackTrace(); 
        }
        return list;
    }

    public static void saveMoviesList(ArrayList<Movie> list)
    {
        try {

            FileWriter fw = new FileWriter( "C:\\tmp\\FavoriteMovies\\files\\data.txt"); 
            
            for (Movie m: list)
            {
                writeMovieToFile(fw, m);

            }
            fw.close();
        }
        catch (IOException e1) { // TODO Auto-generated catch block
            e1.printStackTrace(); 
        }
    }

    public static ArrayList<Star> getStars()
    {
        ArrayList<Star> list = new ArrayList<Star>();
        try{
            FileReader fr = new FileReader( "c:\\tmp\\src\\files\\star_data.txt");
            BufferedReader br = new BufferedReader(fr);
            String line = null;
            while ((line=br.readLine())!=null)
            {
                Star s = Star.parseString(line);
                list.add(s);
            }
        }
        catch (IOException e1) { // TODO Auto-generated catch block
            e1.printStackTrace(); 
        }
        return list;
    }

    public static void addStar(Star s)
    {

    }

    public static void addRating(Rating r)
    {

    }

    public static int findMovieId(String title)
    {
        // TODO 6: search all titles and find matching movie id , return 0 if not found
        System.out.println("Finding for title: " + title);
        ArrayList<Movie> list = getMovies();
        for (Movie movie : list) 
        {
            System.out.println("title: " + movie.getTitle());
            if (movie.getTitle().equals(title))
                return movie.getMovieId();            
        }
        
        return 0;
    }

    public static boolean incNumWatched(int movieId)
    {
        // TODO 7: find movie by id and increment numWatched by 1
        boolean found = false;
        ArrayList<Movie> list = getMovies();
        for (Movie movie : list) 
        {
            if (movie.getMovieId() == movieId)
            {
                movie.setNumWatched(movie.getNumWatched()+1);
                found = true;
            }
        }
        if (found)
            saveMoviesList(list);
        return found;
    }

    public static Movie findTopMovieByGenre(String genre)
    {
        Movie m = new Movie();
        m.setAvgRating(0);
        // TODO 8: search all movies by genre, and find the one with the top rating and return it
        ArrayList<Movie> list = getMovies();
        for (Movie movie : list) 
        {
            if (movie.getGenre().equals(genre))
            {
                if (movie.getAvgRating() > m.getAvgRating())
                    m = movie;
            }
        }
        return m;
    }

    public static ArrayList<Movie> findMoviesForStar(String starName)
    {
        
        ArrayList<Movie> list = new ArrayList<Movie>();
        // TODO 9: search all movies in which the star has acted and return a list  
        ArrayList<Movie> fullList = getMovies();
        for (Movie movie : fullList) 
        {

        }
        return list;
    }
        
}