1 files changed, 120 insertions, 0 deletions
diff --git a/src/Quiz.java b/src/Quiz.java
new file mode 100644
index 0000000..a630890
--- /dev/null
+++ b/src/Quiz.java
@@ -0,0 +1,120 @@
+import java.io.*;
+import java.util.*;
+
+public class Quiz {
+    private String name;
+    private final ArrayList<Question> questions = new ArrayList<>();
+
+    public Quiz() {
+    }
+
+    public Quiz(String name) {
+        this.name = name;
+    }
+
+    public static Quiz loadFromFile(String filePath) throws FileNotFoundException, InvalidQuizFormatException {
+        File file = new File(filePath);
+        Quiz quiz = new Quiz(file.getName().split(".txt")[0]);
+        BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
+
+        try {
+            while (bufferedReader.ready()) {
+                ArrayList<String> lines = new ArrayList<>();
+
+                while (true) {
+                    String line = bufferedReader.readLine();
+
+                    if (line != null && !line.equals("")) {
+                        lines.add(line);
+                    } else {
+                        break;
+                    }
+                }
+
+                if (lines.size() == 2) {
+                    quiz.addQuestion(new FillIn(lines.get(0), lines.get(1)));
+                } else if (lines.size() > 2) {
+                    quiz.addQuestion(new Test(lines.get(0), lines.get(1), lines.subList(1, lines.size()).toArray(new String[0])));
+                } else {
+                    throw new InvalidQuizFormatException("No line found");
+                }
+            }
+        } catch (IOException ignored) {
+        }
+
+        return quiz;
+    }
+
+    public void start() {
+        Scanner scanner = new Scanner(System.in);
+        int correctAnswers = 0;
+
+        Collections.shuffle(questions);
+        System.out.printf("""
+                =======================================================
+                
+                              WELCOME TO "%s" QUIZ!
+                
+                -------------------------------------------------------
+                """, name);
+        for (int i = 0; i < questions.size(); i++) {
+            Question question = questions.get(i);
+
+            if (question instanceof Test) {
+                String choice;
+
+                ((Test) question).shuffleOptions();
+                System.out.printf("""
+                    %d. %s
+                    ----------------------------
+                    """, i + 1, question);
+                System.out.print("Enter the correct choice: ");
+                choice = scanner.next();
+                while (choice.length() != 1 || choice.charAt(0) < 65 || choice.charAt(0) > ((Test) question).getNumOfOptions() + 64) {
+                    System.out.print("Invalid choice! Try again (Ex: A, B, ...): ");
+                    choice = scanner.next();
+                }
+                if (((Test) question).isCorrectAnswer(choice.charAt(0))) {
+                    System.out.println("Correct!");
+                    correctAnswers++;
+                } else {
+                    System.out.println("Incorrect!");
+                }
+            } else if (question instanceof FillIn) {
+                System.out.printf("""
+                    %d. %s
+                    ----------------------------
+                    """, i + 1, question);
+                System.out.print("Type your answer: ");
+                if (scanner.next().equalsIgnoreCase(question.getAnswer())) {
+                    System.out.println("Correct!");
+                    correctAnswers++;
+                } else {
+                    System.out.println("Incorrect!");
+                }
+            }
+            System.out.println("-------------------------------------------------------");
+        }
+        System.out.printf("Correct Answers: %d/%d (%.1f%%)", correctAnswers, questions.size(), (double) correctAnswers / questions.size() * 100);
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void addQuestion(Question question) {
+        questions.add(question);
+    }
+
+    @Override
+    public String toString() {
+        return "Quiz{" +
+                "name='" + name + '\'' +
+                ", questions=" + questions +
+                '}';
+    }
+}