From 655ec610fcce8dd7748f10772d520bdff4f7c78e Mon Sep 17 00:00:00 2001
From: Arne Rief <riearn@proton.me>
Date: Fri, 19 Dec 2025 20:03:03 +0100
Subject: Basic setup & login

---
 frontend/src/pages/Login.tsx | 148 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 frontend/src/pages/Login.tsx

(limited to 'frontend/src/pages/Login.tsx')

diff --git a/frontend/src/pages/Login.tsx b/frontend/src/pages/Login.tsx
new file mode 100644
index 0000000..2e99a2f
--- /dev/null
+++ b/frontend/src/pages/Login.tsx
@@ -0,0 +1,148 @@
+import { useEffect, useState, type ChangeEvent, type FormEvent } from "react";
+import { useNavigate } from "react-router-dom";
+import { FadeLoader } from "react-spinners";
+import Logo from "../components/Logo";
+import API_URL from "../config";
+import "../styles/Button.css";
+import "../styles/Login.css";
+import type {
+    ErrorResponse,
+    LoginFormData,
+    LoginResponse,
+} from "../types/login";
+
+const EMPTY_FORM_DATA: LoginFormData = {
+    email: "",
+    password: "",
+};
+
+function Login() {
+    const navigate = useNavigate();
+
+    const [errorMessage, setErrorMessage] = useState<string>("");
+    const [formData, setFormData] = useState<LoginFormData>(EMPTY_FORM_DATA);
+    const [isLoading, setIsLoading] = useState<boolean>(false);
+
+    function handleUserInput(event: ChangeEvent<HTMLInputElement>) {
+        if (errorMessage) {
+            setErrorMessage("");
+        }
+
+        setFormData((oldFormData) => ({
+            ...oldFormData,
+            [event.target.name]: event.target.value,
+        }));
+    }
+
+    async function handleLogin(event: FormEvent<HTMLFormElement>) {
+        event.preventDefault();
+        setErrorMessage("");
+
+        if (!formData.email || !formData.password) {
+            setErrorMessage("E-mail address and password are required.");
+            return;
+        }
+
+        setIsLoading(true);
+
+        try {
+            const response = await fetch(`${API_URL}/auth/login`, {
+                method: "POST",
+                headers: { "Content-Type": "application/json" },
+                body: JSON.stringify(formData),
+            });
+
+            if (!response.ok) {
+                const errorData: ErrorResponse = await response.json();
+                throw new Error(
+                    errorData.message ||
+                        `Login failed, status: ${response.status}`
+                );
+            }
+
+            const data: LoginResponse = await response.json();
+
+            localStorage.setItem("token-robot-tracker", data.token);
+            localStorage.setItem("user", JSON.stringify(data.user));
+            setFormData(EMPTY_FORM_DATA);
+
+            navigate("/dashboard", { replace: true });
+        } catch (error) {
+            console.error(error);
+
+            if (error instanceof Error) {
+                setErrorMessage(error.message);
+            } else {
+                setErrorMessage("An unexpected error occurred.");
+            }
+        } finally {
+            setIsLoading(false);
+        }
+    }
+
+    // Clear local storage on component mounting
+    useEffect(() => {
+        localStorage.removeItem("token-robot-tracker");
+        localStorage.removeItem("user");
+    }, []);
+
+    return (
+        <div className="login-page">
+            <div className="login-card">
+                <Logo />
+                <p className="subtitle">🤖 Please log in to use the app 🤖</p>
+
+                {/* "noValidate" to enable manual errorMessage in handleLogin; alternatively omit "required" */}
+                <form className="login-form" onSubmit={handleLogin} noValidate>
+                    <div className="form-group">
+                        <label htmlFor="email">E-Mail</label>
+                        <input
+                            type="email"
+                            id="email"
+                            name="email"
+                            value={formData?.email || ""}
+                            onChange={handleUserInput}
+                            required
+                            placeholder="Your e-mail..."
+                            disabled={isLoading}
+                        />
+                    </div>
+
+                    <div className="form-group">
+                        <label htmlFor="password">Password</label>
+                        <input
+                            type="password"
+                            id="password"
+                            name="password"
+                            value={formData?.password || ""}
+                            onChange={handleUserInput}
+                            required
+                            placeholder="Your password..."
+                            disabled={isLoading}
+                        />
+                    </div>
+
+                    {errorMessage && (
+                        <div className="error-message">{errorMessage}</div>
+                    )}
+
+                    <button
+                        className="btn btn-start"
+                        disabled={isLoading}
+                        type="submit"
+                    >
+                        {isLoading ? (
+                            <div className="loading-spinner-container">
+                                <FadeLoader />
+                            </div>
+                        ) : (
+                            "Login"
+                        )}
+                    </button>
+                </form>
+            </div>
+        </div>
+    );
+}
+
+export default Login;
-- 
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