Merge pull request '3oop' (#1) from develop into main

Reviewed-on: #1
Reviewed-by: Hosein Asfiaee

src/main/java/Rational/Rational.java

@@ -51,45 +51,46 @@ public class Rational {
         return r1.add(r2);
     }
 
-    // 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
-        return null; // Remove this line when implemented
+                - other.numerator * this.denominator;
+
+        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
+
-        // HINT: Division is multiplication by reciprocal
+        if (other.numerator == 0) {
-        // Don't forget to check if other.numerator is zero!
+            throw new ArithmeticException("Cannot divide by 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

@@ -21,17 +21,34 @@ public class Main {
                     break;
 
                 case 2:
-                    // TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre()
+
+                    Long genreId =
+                            getLongInput("Enter genre ID: ");
+
+
+                    Long page =
+                            getLongInput("Enter page number: ");
+
+
+                    movieService.displayMoviesByGenre(
+                            genreId,
+                            page
+                    );
 
                     break;
 
 
                 case 3:
-                    // TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails()
 
+                    Long movieId =
+                            getLongInput("Enter movie ID: ");
+
+
+                    movieService.displayMovieDetails(movieId);
 
                     break;
 
+
                 case 0:
                     running = false;
                     System.out.println("Goodbye!");

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

@@ -2,10 +2,6 @@ package movie.apis;
 
 import java.util.List;
 
-/**
- * Model class representing a movie
- * Fields: id, title, genres, images
- */
 public class Movie {
 
     private Long id;
@@ -16,9 +12,103 @@ public class Movie {
     private String imdbRating;
     private String country;
 
-    // TODO: Create a constructor with all fields
 
-    // TODO: Create a simple constructor with id and title only
+    public Movie(Long id, String title, List<Genre> genres,
+                 String images, String year,
+                 String imdbRating, String country) {
 
-    // TODO: Create getters and setters for all fields
+        this.id = id;
+        this.title = title;
+        this.genres = genres;
+        this.images = images;
+        this.year = year;
+        this.imdbRating = imdbRating;
+        this.country = country;
+    }
+
+
+    public Movie(Long id, String title) {
+        this.id = id;
+        this.title = title;
+    }
+
+
+    public Movie() {
+    }
+
+
+    public Long getId() {
+        return id;
+    }
+
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+
+    public String getTitle() {
+        return title;
+    }
+
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+
+    public List<Genre> getGenres() {
+        return genres;
+    }
+
+
+    public void setGenres(List<Genre> genres) {
+        this.genres = genres;
+    }
+
+
+    public String getImages() {
+        return images;
+    }
+
+
+    public void setImages(String images) {
+        this.images = images;
+    }
+
+
+    public String getYear() {
+        return year;
+    }
+
+
+    public void setYear(String year) {
+        this.year = year;
+    }
+
+
+    public String getImdbRating() {
+        return imdbRating;
+    }
+
+
+    public void setImdbRating(String imdbRating) {
+        this.imdbRating = imdbRating;
+    }
+
+
+    public String getCountry() {
+        return country;
+    }
+
+
+    public void setCountry(String country) {
+        this.country = country;
+    }
+
+
+    @Override
+    public String toString() {
+        return id + ". " + title + " (" + year + ")";
+    }
 }

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

@@ -61,7 +61,6 @@ public class MovieService {
     }
 
 
-
     public void displayGenres() {
         String jsonResponse = getGenresList();
 
@@ -73,7 +72,8 @@ public class MovieService {
         try {
             JsonObject rootObject = JsonParser.parseString(jsonResponse).getAsJsonObject();
             JsonArray genresArray = rootObject.getAsJsonArray("genres");
-            Type genreListType = new TypeToken<ArrayList<Genre>>(){}.getType();
+            Type genreListType = new TypeToken<ArrayList<Genre>>() {
+            }.getType();
             Gson gson = new Gson();
             List<Genre> genres = gson.fromJson(genresArray, genreListType);
 
@@ -89,26 +89,86 @@ public class MovieService {
 
     /**
      * TODO 1: Display movies for a specific genre and page
-     *
+     * <p>
      * JSON format: { "movies": [ { "id": 1, "title": "Movie", "year": "1994" } ], "total": 177, "total_pages": 18 }
-     *
+     * <p>
      * Steps:
      * - Call getMoviesByGenreList(genreId, page) to get JSON
      * - Parse JSON to JsonObject
      * - Get "movies" array (NOT "data")
      * - Loop through array and print: "ID: {id} | {title} ({year})"
      * - Also print total and total_pages
-     *
+     * <p>
      * 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
+        String jsonResponse = getMoviesByGenreList(genreId, page);
+
+        if (jsonResponse == null) {
+            System.out.println("Failed to get movies");
+            return;
+        }
+
+
         try {
-            // Your code here
+
+            JsonObject rootObject =
+                    JsonParser.parseString(jsonResponse)
+                            .getAsJsonObject();
+
+
+            JsonArray moviesArray =
+                    rootObject.getAsJsonArray("movies");
+
+
+            System.out.println("\nMOVIES:");
+
+            for (JsonElement element : moviesArray) {
+
+                JsonObject movie =
+                        element.getAsJsonObject();
+
+
+                Long id =
+                        movie.get("id").getAsLong();
+
+
+                String title =
+                        movie.get("title").getAsString();
+
+
+                String year =
+                        movie.has("year")
+                                ? movie.get("year").getAsString()
+                                : "Unknown";
+
+
+                System.out.println(
+                        "ID: " + id +
+                                " | " + title +
+                                " (" + year + ")"
+                );
+            }
+
+
+            System.out.println(
+                    "\nTotal movies: "
+                            + rootObject.get("total").getAsInt()
+            );
+
+
+            System.out.println(
+                    "Total pages: "
+                            + rootObject.get("total_pages").getAsInt()
+            );
+
 
         } catch (Exception e) {
-            System.err.println("ERROR: " + e.getMessage());
+
+            System.err.println(
+                    "ERROR: " + e.getMessage()
+            );
         }
     }
 
@@ -118,34 +178,65 @@ public class MovieService {
      * URL format: https://api.meshcomp.ir/api/v1/movies/{movieId}
      */
     private String getMovieById(Long movieId) {
-        try {
-            // TODO: Complete this method
-            // String url = MOVIE_BY_ID_URL + movieId;
-            // HttpRequest request = HttpRequest.newBuilder().uri(URI.create(url)).build();
-            // HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
-            // if (response.statusCode() == 200) return response.body();
 
-            return null;
+        try {
+
+            String url = MOVIE_BY_ID_URL + movieId;
+
+
+            HttpRequest request =
+                    HttpRequest.newBuilder()
+                            .uri(URI.create(url))
+                            .build();
+
+
+            HttpResponse<String> response =
+                    client.send(
+                            request,
+                            HttpResponse.BodyHandlers.ofString()
+                    );
+
+
+            if (response.statusCode() == 200) {
+
+                return response.body();
+
+            } else {
+
+                System.out.println(
+                        "HTTP error: "
+                                + response.statusCode()
+                );
+
+            }
+
+
         } catch (Exception e) {
-            System.out.println("!!Exception : " + e.getMessage());
+
+            System.out.println(
+                    "!!Exception : "
+                            + e.getMessage()
+            );
         }
+
+
         return null;
     }
 
     /**
      * BONUS TODO: Display complete movie details for a given movie ID
-     *
+     * <p>
      * Expected JSON format from getMovieById():
      * {
-     *   "id": 1,
+     * "id": 1,
-     *   "title": "The Shawshank Redemption",
+     * "title": "The Shawshank Redemption",
-     *   "year": "1994",
+     * "year": "1994",
-     *   "genres": ["Crime", "Drama"],
+     * "genres": ["Crime", "Drama"],
-     *   "poster": "https://moviesapi.ir/images/tt0111161_poster.jpg",
+     * "poster": "https://moviesapi.ir/images/tt0111161_poster.jpg",
-     *   "country": "USA",
+     * "country": "USA",
-     *   "imdb_rating": "9.3"
+     * "imdb_rating": "9.3"
      * }
-     *
+     * <p>
      * INSTRUCTIONS:
      * 1. Call getMovieById(movieId) to get the JSON response
      * 2. Check if response is null (if yes, print error and return)
@@ -153,7 +244,7 @@ public class MovieService {
      * 4. Extract all fields: id, title, year, genres array, poster, country, imdb_rating
      * 5. Convert genres array to comma-separated string
      * 6. Print all movie details in a readable format
-     *
+     * <p>
      * PUT ALL PARSING CODE INSIDE THE EXISTING try-catch
      *
      * @param movieId The ID of the movie to display
@@ -170,19 +261,70 @@ public class MovieService {
 
         // Step 3-6: Parse JSON and display details (PUT YOUR CODE INSIDE try-catch)
         try {
-            // TODO: Parse jsonResponse to JsonObject
-            // TODO: Extract id, title, year, genres array, poster, country, imdb_rating
-            // TODO: Convert genres array to a readable string
-            // TODO: Print all movie details
-            // HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject()
-            // HINT: Use getAsJsonArray("genres") to get genres
-            // HINT: For each genre, use getAsString()
 
-            // Your code here:
+            JsonObject movie =
+                    JsonParser.parseString(jsonResponse)
+                            .getAsJsonObject();
 
 
+            Long id =
+                    movie.get("id").getAsLong();
+
+
+            String title =
+                    movie.get("title").getAsString();
+
+
+            String year =
+                    movie.get("year").getAsString();
+
+
+            String poster =
+                    movie.get("poster").getAsString();
+
+
+            String country =
+                    movie.get("country").getAsString();
+
+
+            String rating =
+                    movie.get("imdb_rating").getAsString();
+
+
+            JsonArray genres =
+                    movie.getAsJsonArray("genres");
+
+
+            StringBuilder genreText =
+                    new StringBuilder();
+
+
+            for (JsonElement g : genres) {
+
+                if (genreText.length() > 0)
+                    genreText.append(", ");
+
+                genreText.append(g.getAsString());
+            }
+
+
+            System.out.println("\n========== MOVIE DETAILS ==========");
+
+            System.out.println("ID: " + id);
+            System.out.println("Title: " + title);
+            System.out.println("Year: " + year);
+            System.out.println("Genres: " + genreText);
+            System.out.println("Poster: " + poster);
+            System.out.println("Country: " + country);
+            System.out.println("IMDB Rating: " + rating);
+
+            System.out.println("===================================");
         } catch (Exception e) {
-            System.err.println("ERROR parsing movie details: " + e.getMessage());
+
+            System.err.println(
+                    "ERROR parsing movie details: "
+                            + e.getMessage()
+            );
         }
     }
 }