Student branch

.gitignore

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+/.idea/*

homework-java/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.example</groupId>
+    <artifactId>homework-java</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.9.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.9.2</version>
+        </dependency>
+
+    </dependencies>
+
+
+</project>

homework-java/src/main/java/com/example/CommandHandler.java

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+package com.example;
+import java.util.*;
+
+public class CommandHandler {
+    private List<Student> students;
+    private List<Teacher> teachers;
+    private List<Course> courses;
+
+    public CommandHandler(List<Student> students, List<Course> courses, List<Teacher> teachers) {
+        this.students = students;
+        this.courses = courses;
+        this.teachers = teachers;
+    }
+
+    public void executeCommand(String wholeCommand){
+        String[] commandPart = wholeCommand.split(" ");
+        String command = commandPart[0];
+        switch (command){
+            case "ENROLL":
+               enrollStudent(commandPart[1],commandPart[2]);
+               break;
+            case "ASSIGN":
+                assignTeacher(commandPart[1],commandPart[2]);
+                break;
+            case "SHOW":
+                System.out.println(command);
+                handleShow(commandPart);
+                break;
+            case "LOOKUP":
+                lookUp(commandPart);
+                break;
+        }
+    }
+
+    public Student findStudentById(String student_id){
+        Student student = null;
+        for(Student s: students){
+            if(s.getStudentId().equals(student_id)){
+                student = s;
+                return student;
+            }
+        }
+        return null;
+    }
+
+    public Course findCourseById(String course_id){
+        Course course = null;
+        for(Course c: courses){
+            if(c.getCourseId().equals(course_id)){
+                course = c;
+                return course;
+            }
+        }
+        return null;
+    }
+
+    public Teacher findTeacherById(String teacher_id){
+        Teacher teacher = null;
+        for(Teacher t: teachers){
+            if(t.getTeacherId().equals(teacher_id)){
+                teacher = t;
+                return teacher;
+            }
+        }
+        return null;
+    }
+
+    private void lookUp(String[] commandPart) {
+        switch (commandPart[1]){
+            case "COURSE":
+                Course course = findCourseById(commandPart[2]);
+                if (course != null)
+                    System.out.println(course.toString());
+                else
+                    System.out.println("Course not found.");
+                break;
+            case "STUDENT":
+                Student student = findStudentById(commandPart[2]);
+                if (student != null)
+                    System.out.println(student.toString());
+                else
+                    System.out.println("Student not found.");
+                break;
+            case "TEACHER":
+                Teacher teacher = findTeacherById(commandPart[2]);
+                if (teacher != null)
+                    System.out.println(teacher.toString());
+                else
+                    System.out.println("Teacher not found.");
+                break;
+        }
+    }
+
+    private void enrollStudent(String student_id, String course_id) {
+        Student student =  findStudentById(student_id);
+        Course course =  findCourseById(course_id);
+
+         if (student != null && course!= null) {
+             student.setCourse(course);
+             updateMoneyEarned(course);
+             System.out.println(student.toString());
+         } else {
+             System.out.println("Couldn't assign the course");
+         }
+
+    }
+
+    public void assignTeacher(String teacher_id, String course_id){
+        Teacher teacher = findTeacherById(teacher_id);
+        Course course = findCourseById(course_id);
+
+        if (teacher != null && course!=null){
+            course.setTeacher(teacher);
+            System.out.println(course.toString());
+        }else {
+            System.out.println("Couldn't assign the course");
+        }
+    }
+
+    private void updateMoneyEarned(Course course){
+        double total = course.getMoney_earned() + course.getPrice();
+        course.setMoney_earned(total);
+    }
+
+    private void handleShow(String[] command) {
+        System.out.println(Arrays.toString(command) + "del handle");
+        switch (command[1]){
+            case "COURSES":
+                showCourses();
+                break;
+            case "STUDENTS":
+                showStudents();
+                break;
+            case "TEACHERS":
+                showTeachers();
+                break;
+            case "PROFIT":
+                showProfit();
+                break;
+        }
+    }
+
+    private void showStudents() {
+        System.out.println("llego a show students");
+        StringBuilder studentsString = new StringBuilder();
+        for (Student student: students){
+            studentsString.append(student.toString()).append("\n");
+        }
+        System.out.println("Student usando el toString() es:");
+        System.out.println(studentsString);
+    }
+
+    private void showTeachers() {
+        StringBuilder teachersString = new StringBuilder();
+        for (Teacher teacher: teachers){
+            teachersString.append(teacher.toString()).append("\n");
+        }
+        System.out.println(teachersString);
+    }
+
+    private void showProfit() {
+        double totalEarned = courses.stream().mapToDouble(Course::getMoney_earned).sum();
+        double totalSalaries = teachers.stream().mapToDouble(Teacher::getSalary).sum();
+
+        System.out.println("===== FINANCIAL REPORT =====");
+        System.out.println("Total income from courses: $" + totalEarned);
+        System.out.println("Total expenses (teachers' salaries): $" + totalSalaries);
+        System.out.println("------------------------------");
+        System.out.printf("Net profit: $%.2f%n", (totalEarned - totalSalaries));
+        System.out.println("==============================");
+    }
+
+    private void showCourses() {
+        StringBuilder coursesString = new StringBuilder();
+        for (Course course: courses){
+            coursesString.append(course.toString()).append("\n");
+        }
+        System.out.println(coursesString);
+    }
+
+
+}

homework-java/src/main/java/com/example/Course.java

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+package com.example;
+
+import java.util.HashSet;
+import java.util.Random;
+import java.util.Set;
+import java.util.UUID;
+
+public class Course {
+    private static final Set<String> usedIds = new HashSet<>();
+
+    private String courseId;
+    private String name;
+    private double price;
+    private double money_earned;
+    private Teacher teacher;
+
+    //constructor de name y price
+    public Course(String name, double price) {
+        this.courseId = generateUniqueCourseId();
+        this.name = name;
+        this.price = price;
+    }
+    //Constructor vacio para UUID
+
+    public Course() {
+        this.courseId = UUID.randomUUID().toString();
+    }
+
+    private String generateUniqueCourseId() {
+        String id;
+        Random random = new Random();
+        do {
+            int number = random.nextInt(900) + 100;
+            id = "C" + number;
+        } while (usedIds.contains(id));
+
+        usedIds.add(id);
+        return id;
+    }
+
+    //getters y setters
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    public String getCourseId() {
+        return courseId;
+    }
+
+    public void setCourseId(String courseId) {
+        this.courseId = courseId;
+    }
+
+    public double getMoney_earned() {
+        return money_earned;
+    }
+
+    public void setMoney_earned(double money_earned) {
+        this.money_earned = money_earned;
+    }
+
+    public Teacher getTeacher() {
+        return teacher;
+    }
+
+    public void setTeacher(Teacher teacher) {
+        this.teacher = teacher;
+    }
+
+
+    @Override
+    public String toString() {
+        return String.format(
+                "📚 Course Info:\n" +
+                        "🔢 ID            : %s\n" +
+                        "📖 Name          : %s\n" +
+                        "💵 Price         : $%.2f\n" +
+                        "💰 Money Earned  : $%.2f\n" +
+                        "👨‍🏫 Teacher      : %s",
+                courseId, name, price, money_earned, teacher
+        );
+    }
+}

homework-java/src/main/java/com/example/Main.java

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+package com.example;
+
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class Main {
+    public static void main(String[] args) {
+
+//comentario
+    }
+}