implement user authentication with login functionality and database integration

frontend/src/components/Form3.tsx

@@ -1,13 +1,6 @@
 import React from "react";
-import { myToast } from "../utils/toastify";
 
 const Form3: React.FC = () => {
-  if (localStorage.getItem("borrowCode")) {
-    myToast("Ausleihe erfolgreich!", "success");
-  } else {
-    myToast("Ausleihe fehlgeschlagen!", "error");
-  }
-
   const code = localStorage.getItem("borrowCode") ?? "—";
 
   return (

frontend/src/components/Header.tsx

@@ -1,4 +1,5 @@
 import React from "react";
+import Cookies from "js-cookie";
 
 const Header: React.FC = () => {
   return (
@@ -9,6 +10,15 @@ const Header: React.FC = () => {
       <p className="text-blue-500 mt-1 md:mt-2 text-base md:text-lg font-medium">
         Schnell und unkompliziert Equipment reservieren
       </p>
+      <button
+        onClick={() => {
+          Cookies.remove("token");
+          window.location.reload();
+        }}
+        className="text-blue-500 hover:underline"
+      >
+        Logout
+      </button>
     </header>
   );
 };

frontend/src/components/LoginForm.tsx

@@ -0,0 +1,74 @@
+import React from "react";
+import { useState } from "react";
+import { loginUser } from "../utils/fetchData";
+import { myToast } from "../utils/toastify";
+
+type LoginFormProps = {
+  onLogin: () => void;
+};
+
+const LoginForm: React.FC<LoginFormProps> = ({ onLogin }) => {
+  const [username, setUsername] = useState("");
+  const [password, setPassword] = useState("");
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    const result = await loginUser(username, password);
+    if (result.success) {
+      myToast("Login successful!", "success");
+      onLogin();
+    } else {
+      myToast("Login failed. Please check your credentials.", "error");
+    }
+  };
+
+  return (
+    <div className="bg-blue-950 min-h-screen">
+      <div className="max-w-sm mx-auto mt-20 bg-white rounded-xl shadow-lg p-8 border border-blue-100">
+        <h2 className="text-2xl font-bold text-blue-700 mb-6 text-center">
+          Login
+        </h2>
+        <form onSubmit={handleSubmit} className="space-y-5">
+          <div>
+            <label
+              htmlFor="username"
+              className="block text-sm font-medium text-gray-700 mb-1"
+            >
+              Username
+            </label>
+            <input
+              type="text"
+              onChange={(e) => setUsername(e.target.value)}
+              id="username"
+              className="mt-1 block w-full border border-gray-300 rounded-md shadow-sm focus:ring-blue-500 focus:border-blue-500 px-3 py-2"
+              required
+            />
+          </div>
+          <div>
+            <label
+              htmlFor="password"
+              className="block text-sm font-medium text-gray-700 mb-1"
+            >
+              Password
+            </label>
+            <input
+              onChange={(e) => setPassword(e.target.value)}
+              type="password"
+              id="password"
+              className="mt-1 block w-full border border-gray-300 rounded-md shadow-sm focus:ring-blue-500 focus:border-blue-500 px-3 py-2"
+              required
+            />
+          </div>
+          <button
+            type="submit"
+            className="w-full bg-blue-600 text-white font-bold py-2 px-4 rounded-md shadow hover:bg-blue-700 transition"
+          >
+            Login
+          </button>
+        </form>
+      </div>
+    </div>
+  );
+};
+
+export default LoginForm;

frontend/src/components/Sidebar.tsx

@@ -1,7 +1,10 @@
 import React from "react";
 import Object from "./Object";
+import { useEffect } from "react";
 
 const Sidebar: React.FC = () => {
+  useEffect(() => {});
+
   const items = JSON.parse(localStorage.getItem("allItems") || "[]");
 
   return (
@@ -20,16 +23,16 @@ const Sidebar: React.FC = () => {
             d="M16.5 7.5V4.75A2.25 2.25 0 0 0 14.25 2.5h-4.5A2.25 2.25 0 0 0 7.5 4.75V7.5m9 0h-9m9 0v11.75A2.25 2.25 0 0 1 14.25 21.5h-4.5A2.25 2.25 0 0 1 7.5 19.25V7.5m9 0h-9"
           />
         </svg>
-        Ausleih-Übersicht
+        Geräte Übersicht
       </h2>
 
       <div className="space-y-4 flex-1 overflow-auto pr-1">
         {items.map((item: any) => (
           <div
-            key={item.id}
+            key={item.item_name}
             className="bg-white/80 rounded-xl p-4 shadow hover:shadow-md transition"
           >
-            <Object title={item.title} description={item.description} />
+            <Object title={item.item_name} description={"test"} />
           </div>
         ))}
       </div>