fixed folder structure

Author: thecoder-ashish

src/employees.cpp

@@ -0,0 +1,330 @@
+#include <iostream>
+#include <string>
+#include <numeric>
+#include <vector>
+#include <algorithm>
+#include <iterator>
+#include <fstream>
+#include <sstream>
+
+using namespace std;
+
+class Employee{
+private:
+    int id, salary;
+    string name, department;
+
+public:
+    // constructor 
+    Employee(int id, string n, string d, int s) : id(id), name(n), department(d), salary(s) {}
+
+    // Getter
+    int getID() const{
+        return id;
+    }
+    int getSalary() const{
+        return salary;
+    }
+    string getName() const{
+        return name;
+    }
+    string getDepartment() const{
+        return department;
+    }
+
+    // Setter
+    void setSalary(int sal) {
+        salary = sal;
+    }
+    void setName(string n) {
+        name = n;
+    }
+    void setDepartement(string dep) {
+        department = dep;
+    }
+
+
+    // methods to be used
+
+    // display details of an employee
+    void displayEmployee() const{
+        cout << "ID: " << id <<endl;
+        cout << "Name: " << name <<endl;
+        cout << "Department: " << department <<endl;
+        cout << "Salary: Rs " << salary <<endl<<endl;
+    }
+
+    // update existing employee
+    void updateEmpData(string n, string depart, int sal){
+        name=n;
+        department=depart;
+        salary=sal;
+
+        cout << "Data of emp id " << id << " is updated\n" ;
+    }
+    
+};
+
+
+// Utility fucntions
+
+// Functions to take inputs
+int takeID(){
+    int id;
+    cin >> id;
+    return id;
+}
+int takeSalary(){
+    int sal;
+    cin >> sal;
+    return sal;
+}
+string takeName(){
+    string name;
+    cin.ignore(); // will be used after some int input everytime
+    getline(cin, name);
+    return name;
+}
+string takeDepartment(){
+    string dep;
+    getline(cin, dep); // will be used after takeName() so no cin.ignore() req
+    return dep;
+}
+
+// Check if the user exist - this will be used by other functions and methods
+// it is not of bool type or Employee type for their lack of functionality
+Employee* empExist(vector<Employee> &emps, int id){
+    for(auto &e : emps){
+        if (e.getID()==id){
+            return &e;
+        }
+    }
+    return nullptr;
+}
+
+// Quick function to print the emp not found message
+void empNotFoundMsg(int id){ cout << "Employee with ID " << id << " not found.\n"; }
+
+
+
+// All the performable operations
+// 1 - Display all employees
+void displayAll(vector<Employee> &emps){
+    for (const auto &e : emps){
+        e.displayEmployee();
+    }
+}
+// 2 - Search and employee
+void searchEmp(vector<Employee> &emps){
+    cout << "Enter employee id to be searched: ";
+    int id = takeID();
+    Employee* empPtr = empExist(emps, id);
+    if (empPtr) {
+        cout << "Employee found here are the details:-\n";
+        empPtr->displayEmployee();
+    } else {
+        empNotFoundMsg(id);
+    }
+}
+
+// 3 - Add employee
+void addEmps(vector<Employee> &emps){
+    int n;
+    cout << "Enter number of employees you want to add: ";
+    cin >> n;
+    for (int i = 0; i < n; i++){
+        cout << "Enter the employee id: ";
+        int id = takeID();
+        cout << "Enter the employee name: ";
+        string n = takeName();
+        cout << "Enter the employee department: ";
+        string dep = takeDepartment();
+        cout << "Enter the employee salary: ";
+        int sal = takeSalary();
+
+        emps.push_back(Employee(id, n, dep, sal));
+    }
+    cout << "\nAll employees added!\n";
+}
+
+// 4 - Update an employee detail
+void updateEmp(vector<Employee> &emps){
+    cout << "Enter employee id to be updated: ";
+    int id = takeID();
+
+    Employee* empPtr = empExist(emps, id);
+    if (empPtr){
+        cout << "Enter the updated name: ";
+        string n = takeName();
+        
+        cout << "Enter the updated department: ";
+        string dep = takeDepartment();
+
+        cout << "Enter the updated salary: ";
+        int sal = takeSalary();
+
+        empPtr->updateEmpData(n, dep, sal);
+    } else {
+        empNotFoundMsg(id);
+    }
+    
+}
+
+// 5 - Removing an employee by searching id
+void deleteEmp(vector<Employee> &emps){
+    cout << "Enter id of the employee to be deleted: ";
+    int id = takeID();
+    if (empExist(emps,id)){
+        emps.erase(
+            remove_if(emps.begin(), emps.end(), [id](const Employee &e){ return e.getID() == id; }),
+            emps.end()
+        );
+        cout << "Data of employee with id " << id << " is deleted";
+    } else {
+        empNotFoundMsg(id);
+    }
+}
+
+// 6 - Custom sort method to sort according to id (joining date) or salary
+// Oldest -> newest
+// or, highest salary -> least salary
+void sortEmps(vector<Employee>& emps){
+    int by;
+    while (true){
+        cout << "How do you want to sort the employees? (1 - by salary, 2 - by joining date or id)";
+        cin >> by;
+        
+        if (by==1){ // sort by salary
+            sort(emps.begin(), emps.end(), [](const Employee& e1, const Employee& e2){
+                return e1.getSalary() > e2.getSalary();
+            });
+            
+            cout << "Employees sorted by descending order of salary\n";
+            break;
+        } else if (by==2) { // sort by joining date (emp id)
+            sort(emps.begin(), emps.end(), [](const Employee& e1, const Employee& e2){
+                return e1.getID() < e2.getID();
+            });
+            cout << "Employees sorted by accending order of joining date\n";
+            break;
+        } else {
+            cout << "\tInvalid sorting type\n";
+        }
+    }
+}
+
+// 7 - Save changes
+void saveChanges(vector<Employee> &emps){
+    ofstream out("../data/employees.csv");
+    if (out){
+        for (const auto &e : emps){
+            int id = e.getID();
+            string n = e.getName();
+            string dep = e.getDepartment();
+            int sal = e.getSalary();
+
+            out << id << ',' << n << ',' << dep << ',' << sal << endl ;
+        }
+        cout << "All the changes are saved!\n";
+    } else {
+        cout << "Unable to save changes - cant open the file ../data/employees.csv";
+    }
+}
+
+
+// Saving file data
+void saveData(vector<Employee> &emps){
+    ofstream out("../data/employees.csv");
+    if (out){
+        for (const auto &e : emps){
+            out << e.getID() << ',' << e.getName() << ',' << e.getDepartment() << ',' << e.getSalary() << '\n';
+        }
+        out.close();
+        cout << "Data saved successfully!!\n";
+    } else{
+        cout << "!!! Cant open the ../data/employees.csv !!!";
+    }
+}
+
+// Loading file data
+void loadData(vector<Employee> &emps){
+    ifstream in("../data/employees.csv");
+    if (in){
+        string line;
+        while (getline(in, line)){
+            stringstream word(line);
+
+            int id, sal;
+            string n, dep;
+            char comma; // to pass the delimiter comma
+
+            word >> id >> comma;
+            getline(word, n, ',');
+            getline(word, dep, ',');
+            word >> sal;
+
+            emps.push_back(Employee(id, n, dep, sal));
+        }
+        in.close();
+    } else {
+        cout << "../data/employees.csv file doesn't exist.";
+    }
+}
+
+// Main interaction ui
+void ui(vector<Employee> &emps){
+    while (true){
+        cout << "\n\t\tWELCOME TO EMPLOYEE MANAGEMENT SYSTEM\n";
+        cout << "Please enter what operation you want to perform\n";
+        cout << "1 - Display all employees\n";
+        cout << "2 - Search employee\n";
+        cout << "3 - Add employees\n";
+        cout << "4 - Update an employee\n";
+        cout << "5 - Delete an employee\n";
+        cout << "6 - Sort Employees\n";
+        cout << "7 - Save all changes\n";
+        cout << "8 - Exit the program\n";
+
+        int choice;
+        cin >> choice;
+
+        switch (choice){
+            case 1:
+                displayAll(emps);
+                break;
+            case 2:
+                searchEmp(emps);
+                break;
+            case 3:
+                addEmps(emps);
+                break;
+            case 4:
+                updateEmp(emps);
+                break;
+            case 5:
+                deleteEmp(emps);
+                break;
+            case 6:
+                sortEmps(emps);
+                break;
+            case 7:
+                saveChanges(emps);
+                break;
+            case 8:
+                cout << "\t\tExiting the program!!";
+                return;
+            default:
+                cout << "\t!!! Invalid input !!!\n";
+                break;
+        }
+    }
+}
+
+
+int main() {
+    vector<Employee> employees;
+    loadData(employees);
+
+    ui(employees);
+    return 0;
+}