Add ContactManager.cpp

ContactManager.cpp

@@ -0,0 +1,54 @@
+#include "ContactManager.h"
+#include "Contact.h"
+
+ContactManager::ContactManager() {}
+
+void ContactManager::addContact(const std::string& name, const std::string& phone, const std::string& email) {
+    contacts.push_back(Contact(name, phone, email));
+}
+
+void ContactManager::removeContact(const std::string& name) {
+    contacts.erase(std::remove_if(contacts.begin(), contacts.end(), [&name](const Contact& contact) {
+        return contact.name == name;
+    }), contacts.end());
+}
+
+void ContactManager::displayContacts() {
+    for (const auto& contact : contacts) {
+        std::cout << contact.name << ", " << contact.phone << ", " << contact.email << std::endl;
+    }
+}
+
+void ContactManager::saveToFile(const std::string& filename) {
+    std::ofstream file(filename);
+    if (file.is_open()) {
+        for (const auto& contact : contacts) {
+            file << contact.name << ", " << contact.phone << ", " << contact.email << std::endl;
+        }
+        file.close();
+    } else {
+        std::cerr << "Unable to open file." << std::endl;
+    }
+}
+
+void ContactManager::loadFromFile(const std::string& filename) {
+    contacts.clear();
+    std::ifstream file(filename);
+    if (file.is_open()) {
+        std::string line;
+        while (std::getline(file, line)) {
+            size_t pos = line.find(", ");
+            std::string name = line.substr(0, pos);
+            line.erase(0, pos + 2);
+
+            pos = line.find(", ");
+            std::string phone = line.substr(0, pos);
+            std::string email = line.substr(pos + 2);
+
+            addContact(name, phone, email);
+        }
+        file.close();
+    } else {
+        std::cerr << "Unable to open file." << std::endl;
+    }
+}