StudentList.ts

import { Student } from "./Student";

export class StudentList {
    students: Array<Student>;

    constructor(students: Array<Student>) {
        this.students = students
    }

    getStudents() {
        return this.students;
    }

    updateStudentName(id: string, name: string) {
        if (this.checkStudentId(id)) {
            for (let index = 0; index < this.students.length; index++) {
                const element = this.students[index];

                if (element.studentId === id) {
                    element.name = name;
                    return element;
                }
            }
        }

        return "Student id doesnt exists";
    }

    checkStudentId(id: string) {
        // let valid = false;

        // for (let index = 0; index < this.students.length; index++) {
        //     const element = this.students[index];

        //     if (element.studentId === id) {
        //         valid = true;
        //     }
        // }
        let checkStudent = this.students.find(element => element.studentId === id);

        if (checkStudent) return true;

        return false;
    }

    updateAge(id: string, age: number) {
        let student = this.students.find(element => element.studentId === id);
        
        if (student) {
            student.age = age;
            return student;
        }

        return "Student id doesnt exists";
    }

    removeStudent(id: string) {
        let studentindex = this.students.findIndex(element => element.studentId === id);
        console.log(studentindex)
         if(studentindex > 0){
            this.students.splice(studentindex, 1)
            return this.students
         }
         return "no such students"
    }

    updateCollege(id: string, newCollegeName: string) {
        let student = this.students.find(element => element.studentId === id);
        
        if (student) {
            student.college = newCollegeName;
            return student;
        }
    }

    updateAddress(id: string, newAddress: string) {
        let student = this.students.find(element => element.studentId === id);
        
        if (student) {
            student.address= newAddress;
            return student;
        }
    }

    updateCourse(id: string, newCourse: string) {
        let student = this.students.find(element => element.studentId === id);
        
        if (student) {
            student.course = newCourse;
            return student;
        }
    }

    updateGender(id: string, newGender: string) {
        let student = this.students.find(element => element.studentId === id);
        
        if (student) {
            student.gender = newGender;
            return student;
        }
    }
}