Merge pull request 'Implement HW-03' (#1) from develop into main

Reviewed-on: Arshida_0/HW-03-oop-and-api-Arshida#1

src/main/java/Rational/Rational.java

@@ -54,42 +54,43 @@ public class Rational {
     // TODO: Instance method - this - other
     // Formula: a/b - c/d = (a*d - c*b) / (b*d)
     public Rational subtract(Rational other) {
-        // YOUR CODE HERE
+        int newNumerator = this.numerator * other.denominator - other.numerator * this.denominator;
-        return null; // Remove this line when implemented
+        int newDenominator = this.denominator * other.denominator;
+        return new Rational(newNumerator, newDenominator);
     }
 
     // TODO: Static method - r1 - r2
     public static Rational subtract(Rational r1, Rational r2) {
-        // YOUR CODE HERE
+        return r1.subtract(r2);
-        return null; // Remove this line when implemented
     }
 
     // TODO: Instance method - this * other
     // Formula: (a/b) * (c/d) = (a*c) / (b*d)
     public Rational multiply(Rational other) {
-        // YOUR CODE HERE
+        int newNumerator = this.numerator * other.numerator;
-        return null; // Remove this line when implemented
+        int newDenominator = this.denominator * other.denominator;
+        return new Rational(newNumerator, newDenominator);
     }
 
     // TODO: Static method - r1 * r2
     public static Rational multiply(Rational r1, Rational r2) {
-        // YOUR CODE HERE
+        return r1.multiply(r2);
-        return null; // Remove this line when implemented
     }
 
     // TODO: Instance method - this / other
     // Formula: (a/b) ÷ (c/d) = (a*d) / (b*c)
     public Rational divide(Rational other) {
-        // YOUR CODE HERE
+        if (other.numerator == 0) {
-        // HINT: Division is multiplication by reciprocal
+            throw new ArithmeticException("Divisor cannot be zero");
-        // Don't forget to check if other.numerator is zero!
+        }
-        return null; // Remove this line when implemented
+        int newNumerator = this.numerator * other.denominator;
+        int newDenominator = this.denominator * other.numerator;
+        return new Rational(newNumerator, newDenominator);
     }
 
     // TODO: Static method - r1 / r2
     public static Rational divide(Rational r1, Rational r2) {
-        // YOUR CODE HERE
+        return r1.divide(r2);
-        return null; // Remove this line when implemented
     }
 
     //  PROVIDED - String representation

src/main/java/movie/apis/Main.java

@@ -21,15 +21,19 @@ public class Main {
                     break;
 
                 case 2:
-                    // TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre()
+                    // TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre() .
-
+                    System.out.println("Enter genre ID and page: ");
+                    Long genre_id = scanner.nextLong();
+                    Long page = scanner.nextLong();
+                    movieService.displayMoviesByGenre(genre_id, page);
                     break;
 
 
                 case 3:
-                    // TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails()
+                    // TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails() .
-
+                    System.out.println("Enter movie ID: ");
-
+                    Long movie_id = scanner.nextLong();
+                    movieService.displayMovieDetails(movie_id);
                     break;
 
                 case 0:

src/main/java/movie/apis/Movie.java

@@ -10,15 +10,73 @@ public class Movie {
 
     private Long id;
     private String title;
-    private List<Genre> genres;
+    private List<String> genres;
-    private String images;
+    private List<String> images;
     private String year;
-    private String imdbRating;
+    private String imdb_rating;
     private String country;
 
     // TODO: Create a constructor with all fields
+    public Movie(Long id, String title, List<String> genres,
+                      List<String> images, String year,
+                      String imdb_rating, String country) {
+        this.id = id;
+        this.title = title;
+        this.genres = genres;
+        this.images = images;
+        this.year = year;
+        this.imdb_rating = imdb_rating;
+        this.country = country;
+    }
 
     // TODO: Create a simple constructor with id and title only
+    public Movie(Long id, String title) {
+        this.id = id;
+        this.title = title;
+    }
 
     // TODO: Create getters and setters for all fields
+    public void setId(Long id) {
+        this.id = id;
+    }
+    public void setTitle(String title) {
+        this.title = title;
+    }
+    public void setGenres(List<String> genres) {
+        this.genres = genres;
+    }
+    public void setImages(List<String> images) {
+        this.images = images;
+    }
+    public void setYear(String year) {
+        this.year = year;
+    }
+    public void setImdb_rating(String imdb_rating) {
+        this.imdb_rating = imdb_rating;
+    }
+    public void setCountry(String country) {
+        this.country = country;
+    }
+
+    public Long getId() {
+        return id;
+    }
+    public String getTitle() {
+        return title;
+    }
+    public List<String> getGenres() {
+        return genres;
+    }
+    public List<String> getImages() {
+        return images;
+    }
+    public String getYear() {
+        return year;
+    }
+    public String getImdb_rating() {
+        return imdb_rating;
+    }
+    public String getCountry() {
+        return country;
+    }
 }

src/main/java/movie/apis/MovieService.java

@@ -4,6 +4,7 @@ import com.google.gson.*;
 import com.google.gson.reflect.TypeToken;
 
 import java.io.IOException;
+import java.lang.reflect.Array;
 import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
@@ -88,7 +89,7 @@ public class MovieService {
     }
 
     /**
-     * TODO 1: Display movies for a specific genre and page
+     * TODO 1: Display movies for a specific genre and page .
      *
      * JSON format: { "movies": [ { "id": 1, "title": "Movie", "year": "1994" } ], "total": 177, "total_pages": 18 }
      *
@@ -101,12 +102,58 @@ public class MovieService {
      *
      * PUT ALL PARSING CODE INSIDE try-catch
      */
-    public void displayMoviesByGenre(Long genreId, Long page) {
-        // TODO: Write your code here
-        // All parsing code must be inside try-catch
-        try {
-            // Your code here
 
+    public List<Movie> listMaker(String str_obj) {
+        List<Movie> movies_lst = new ArrayList<Movie>();
+        try {
+            JsonObject json_obj = JsonParser.parseString(str_obj).getAsJsonObject();
+            JsonArray movies_data = json_obj.getAsJsonArray("movies");
+
+            for (int i = 0; i < movies_data.size(); i++){
+                JsonObject movie = movies_data.get(i).getAsJsonObject();
+                Long id = movie.get("id").getAsLong();
+                String title = movie.get("title").toString();
+                String year = movie.get("year").toString();
+
+                Movie Movie_movie = new Movie(id, title);
+                Movie_movie.setYear(year);
+
+                movies_lst.add(Movie_movie);
+            }
+            return movies_lst;
+
+        } catch (Exception e) {
+            System.err.println("ERROR: " + e.getMessage());
+        }
+        return null;
+    }
+
+    public void printMoviesList(List<Movie> lst) {
+        if (lst != null) {
+            for (int i = 0; i < lst.size(); i++) {
+                Movie a_movie = lst.get(i);
+                System.out.println("ID: " + a_movie.getId() + " | " +
+                        a_movie.getTitle() + " (" + a_movie.getYear() + ")");
+            }
+        }
+    }
+
+    public void displayMoviesByGenre(Long genreId, Long page) {
+        // TODO: Write your code here .
+        // All parsing code must be inside try-catch
+        String str_obj = getMoviesByGenreList(genreId, page);
+        if (str_obj == null) {
+            System.out.println("Failed to get movies by genre");
+            return;
+        }
+            List<Movie> movie_list = listMaker(str_obj);
+        printMoviesList(movie_list);
+
+        try {
+            JsonObject json_obj = JsonParser.parseString(str_obj).getAsJsonObject();
+            String total = json_obj.get("total").toString();
+            String total_pages = json_obj.get("total_pages").toString();
+            System.out.println("total: " + total + " total pages: " + total_pages);
         } catch (Exception e) {
             System.err.println("ERROR: " + e.getMessage());
         }
@@ -114,18 +161,17 @@ public class MovieService {
 
 
     /**
-     * BONUS: Fetch movie details from API using movie ID
+     * BONUS: Fetch movie details from API using movie ID .
      * URL format: https://api.meshcomp.ir/api/v1/movies/{movieId}
      */
     private String getMovieById(Long movieId) {
         try {
-            // TODO: Complete this method
+            // TODO: Complete this method .
-            // String url = MOVIE_BY_ID_URL + movieId;
+            String url = MOVIE_BY_ID_URL + movieId;
-            // HttpRequest request = HttpRequest.newBuilder().uri(URI.create(url)).build();
+            HttpRequest request = HttpRequest.newBuilder().uri(URI.create(url)).build();
-            // HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
-            // if (response.statusCode() == 200) return response.body();
+            if (response.statusCode() == 200) return response.body();
 
-            return null;
         } catch (Exception e) {
             System.out.println("!!Exception : " + e.getMessage());
         }
@@ -133,7 +179,7 @@ public class MovieService {
     }
     
     /**
-     * BONUS TODO: Display complete movie details for a given movie ID
+     * BONUS TODO: Display complete movie details for a given movie ID .
      *
      * Expected JSON format from getMovieById():
      * {
@@ -167,22 +213,44 @@ public class MovieService {
             System.out.println("Failed to get movie details for ID: " + movieId);
             return;
         }
-
         // Step 3-6: Parse JSON and display details (PUT YOUR CODE INSIDE try-catch)
         try {
-            // TODO: Parse jsonResponse to JsonObject
+            // TODO: Parse jsonResponse to JsonObject .
-            // TODO: Extract id, title, year, genres array, poster, country, imdb_rating
+            JsonObject json_obj = JsonParser.parseString(jsonResponse).getAsJsonObject();
-            // TODO: Convert genres array to a readable string
+
-            // TODO: Print all movie details
+            // TODO: Extract id, title, year, genres array, poster, country, imdb_rating .
+            String id = json_obj.get("id").toString();
+            String title = json_obj.get("title").toString();
+            String year = json_obj.get("year").toString();
+            String poster = json_obj.get("poster").toString();
+            String country = json_obj.get("country").toString();
+            String imdb_rating = json_obj.get("imdb_rating").toString();
+            JsonArray genres = json_obj.getAsJsonArray("genres");
+
+            // TODO: Convert genres array to a readable string .
+            String genres_str = "";
+            for (int i = 0; i < genres.size(); i++) {
+                String a_genre = genres.get(i).toString();
+                genres_str += a_genre;
+                if (i != genres.size() - 1) genres_str += ", ";
+            }
+
+            // TODO: Print all movie details .
+            String info = ("ID: " + id + "title: " + title +
+                    "year: " + year + "poster: " + poster +
+                    "ccountry: " + country + "imdb rating: " + imdb_rating +
+                    "genres: " + genres_str);
+            System.out.println(info);
+
             // HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject()
             // HINT: Use getAsJsonArray("genres") to get genres
             // HINT: For each genre, use getAsString()
 
             // Your code here:
 
-
         } catch (Exception e) {
             System.err.println("ERROR parsing movie details: " + e.getMessage());
         }
     }
+    //
 }