Added: fully working signin/signup system with routing

frontend/app/login.js

@@ -0,0 +1,117 @@
+import { StyleSheet, TextInput, View, Text, Image } from "react-native";
+import { useEffect, useState } from "react";
+import { router } from "expo-router";
+import Button from "../components/Button";
+import { colors } from "../components/style";
+
+import { useAuth } from "./context/AuthContext";
+
+function LoginPage() {
+  const [pass, setPass] = useState("");
+  const [email, setEmail] = useState("");
+  const { onLogin, authState } = useAuth();
+
+  useEffect(() => {
+    if (authState.authenticated) {
+      router.replace("/");
+    }
+  }, [authState.authenticated]);
+
+  function login() {
+    onLogin(email, pass);
+  }
+
+  return (
+    <View style={styles.container}>
+      <View style={styles.header}>
+        <Image
+          source={require("../assets/deguapp_logo.png")}
+          style={styles.logo}
+        />
+        <Text style={styles.h1}>Please Log In</Text>
+      </View>
+      <View style={styles.form}>
+        <TextInput
+          style={styles.input}
+          placeholder="Enter your email"
+          autoCapitalize="none"
+          autoCompleteType="email"
+          textContentType="emailAddress"
+          keyboardType="email-address"
+          placeholderTextColor={"#aaaaaa"}
+          returnKeyType="next"
+          value={email}
+          onChangeText={(text) => setEmail(text)}
+        />
+        <TextInput
+          style={styles.input}
+          secureTextEntry={true}
+          placeholder="Enter your password"
+          placeholderTextColor={"#aaaaaa"}
+          returnKeyType="done"
+          value={pass}
+          onChangeText={(text) => setPass(text)}
+        />
+        <View style={styles.btnContainer}>
+          <Button
+            style={styles.button}
+            title="Sign Up"
+            color={colors.charcoal}
+            onPress={() => router.replace("/signup")}
+          />
+          <Button
+            style={styles.button}
+            title="Log In"
+            color={colors.gold}
+            onPress={login}
+          />
+        </View>
+      </View>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    width: "100%",
+    height: "100%",
+    backgroundColor: colors.dark,
+  },
+  form: {
+    flex: 1,
+    alignItems: "center",
+    paddingTop: "10%",
+    width: "100%",
+    gap: 15,
+  },
+  h1: {
+    color: "#FFF",
+    fontSize: 30,
+    textAlign: "center",
+    paddingTop: "20%",
+  },
+  logo: {
+    width: "80%",
+    resizeMode: "contain",
+  },
+  header: {
+    width: "100%",
+    alignItems: "center",
+    paddingTop: "20%",
+  },
+  input: {
+    height: "auto",
+    width: "60%",
+    borderColor: "gray",
+    borderWidth: 1,
+    borderRadius: 5,
+    padding: 10,
+    color: "#fff",
+  },
+  btnContainer: {
+    flexDirection: "row",
+    gap: 5,
+  },
+});
+
+export default LoginPage;