Added: fully working signin/signup system with routing

frontend/app/(app)/_layout.js

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+import { Redirect, Stack } from "expo-router";
+
+import { useAuth } from "../context/AuthContext";
+import { View, Text } from "react-native";
+
+export default function AppLayout() {
+  const { authState } = useAuth();
+
+  if (authState.authenticated === null) {
+    // micro loading co neni skoro videt ale get the fuck out se uz neloguje
+    return (
+      <View>
+        <Text>Loading...</Text>
+      </View>
+    );
+  }
+  if (!authState.authenticated) {
+    console.log("get the fuck out");
+    return <Redirect href="/login" />;
+  }
+  return <Stack />;
+}

frontend/app/(app)/index.js

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+import { Text, View } from "react-native";
+
+import { useAuth } from "../context/AuthContext";
+
+export default function Index() {
+  const { onLogout } = useAuth();
+  const user = "debil"
+  return (
+    <View style={{ flex: 1, justifyContent: "center", alignItems: "center" }}>
+      <Text>Welcome {user}</Text>
+      <Text
+        onPress={() => {
+          // The `app/(app)/_layout.tsx` will redirect to the sign-in screen.
+          onLogout();
+        }}
+      >
+        Sign Out
+      </Text>
+    </View>
+  );
+}

frontend/app/_layout.js

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+import { Slot } from "expo-router";
+import { AuthProvider } from "./context/AuthContext";
+
+export default function Root() {
+  return (
+    <AuthProvider>
+      <Slot />
+    </AuthProvider>
+  );
+}

frontend/app/context/AuthContext.js

@@ -0,0 +1,103 @@
+import { createContext, useContext, useEffect, useState } from "react";
+import axios from "axios";
+import storageUtil from "./storage";
+
+const TOKEN_KEY = "my-jwt";
+export const API_URL = "http://10.69.1.137:6060/api/v1";
+const AuthContext = createContext(null);
+
+export function useAuth() {
+  const authContext = useContext(AuthContext);
+  if (authContext === undefined) {
+    throw new Error("Context is outside of provider");
+  }
+  return authContext;
+}
+
+export function AuthProvider({ children }) {
+  const [authState, setAuthState] = useState({
+    token: null,
+    authenticated: null,
+  });
+
+  useEffect(() => {
+    // tohle se zavola jen poprve pri startu appky
+    async function loadToken() {
+      const token = await storageUtil.getItem(TOKEN_KEY);
+      console.log(`stored: ${token}`);
+
+      if (token) {
+        axios.defaults.headers.common["Authorization"] = `Bearer ${token}`;
+
+        setAuthState({
+          token: token,
+          authenticated: true,
+        });
+
+        return;
+      }
+      setAuthState({
+        authenticated: false,
+        token: null,
+      });
+    }
+    loadToken();
+  }, []);
+
+  async function register(username, email, password) {
+    try {
+      const res = await axios.post(`${API_URL}/auth/signup`, {
+        username,
+        email,
+        password,
+      });
+      return res
+    } catch (err) {
+      return { error: true, msg: err.response.data};
+    }
+  }
+
+  async function login(email, password) {
+    try {
+      const res = await axios.post(`${API_URL}/auth/signin`, {
+        email,
+        password,
+      });
+
+      setAuthState({
+        token: res.data.data.jwt,
+        authenticated: true,
+      });
+
+      //axios.defaults.headers.common[
+      //  "Authorization"
+      //] = `Bearer ${res.data.data.jwt}`;
+
+      await storageUtil.setItem(TOKEN_KEY, res.data.data.jwt);
+
+      return res
+    } catch (err) {
+      return { error: true, msg: err.res };
+    }
+  }
+
+  async function logout() {
+    await storageUtil.delItem(TOKEN_KEY);
+
+    axios.defaults.headers.common["Authorization"] = "";
+
+    setAuthState({
+      token: null,
+      authenticated: false,
+    });
+  }
+
+  const value = {
+    onSignin: register,
+    onLogin: login,
+    onLogout: logout,
+    authState,
+  };
+
+  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
+}

frontend/app/context/storage.js

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+import * as SecureStore from "expo-secure-store";
+import { Platform } from "react-native";
+import AsyncStorage from "@react-native-async-storage/async-storage";
+
+const storageUtil = {
+  setItem: async (k, v) => {
+    if (Platform.OS === "web") {
+      // web
+      await AsyncStorage.setItem(k, v);
+    } else {
+      // mobile
+      await SecureStore.setItemAsync(k, v.toString()); // v must be string,
+    }
+  },
+  getItem: async (k) => {
+    if (Platform.OS === "web") {
+      // web
+      return await AsyncStorage.getItem(k);
+    } else {
+      // mobile
+      return await SecureStore.getItemAsync(k);
+    }
+  },
+  delItem: async (k) => {
+    if (Platform.OS === "web") {
+      // web
+      await AsyncStorage.removeItem(k);
+    } else {
+      // mobile
+      await SecureStore.deleteItemAsync(k);
+    }
+  },
+};
+export default storageUtil;

frontend/app/hooks/useIsAutheticated.js

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+import { useAuth } from "../context/AuthContext";
+
+export function useIsAutheticated() {
+  const { authState } = useAuth();
+  return authState.authenticated
+}

frontend/app/index.js.old

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+import { Redirect, Link } from "expo-router";
+import { Text, View } from "react-native";
+import { AuthProvider } from "./context/AuthContext";
+
+function HomePage() {
+  return <Redirect href="/login" />;
+}
+
+export default HomePage;

frontend/app/login.js

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+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;

frontend/app/signup.js

@@ -0,0 +1,148 @@
+import { StyleSheet, TextInput, View, Text, Image } from "react-native";
+import { useState } from "react";
+import Button from "../components/Button";
+import { colors } from "../components/style";
+import { Link, router } from "expo-router";
+
+import { useAuth } from "./context/AuthContext";
+
+function SignupPage() {
+  const [pass1, setPass1] = useState("");
+  const [pass2, setPass2] = useState("");
+  const [email, setEmail] = useState("");
+  const [username, setUsername] = useState("");
+  const { onSignin } = useAuth();
+
+  async function signin() {
+    if (pass1 == pass2) {
+      const res = await onSignin(username, email, pass1);
+      if (res.error) {
+        if(res.msg.message == "validation error") {
+          alert(res.msg.data.message);
+        } else {
+          alert(res.msg.message)
+        }
+      }
+      if (!res.error) {
+        alert("You have been successfully registered. Please Log In");
+        router.replace("/login");
+      }
+      return;
+    }
+
+    alert("Passwords are not same!");
+  }
+
+  return (
+    <View style={styles.container}>
+      <View style={styles.header}>
+        <Image
+          source={require("../assets/deguapp_logo.png")}
+          style={styles.logo}
+        />
+        <Text style={styles.h1}>Please Sign Up</Text>
+      </View>
+
+      <View style={styles.form}>
+        <TextInput
+          style={styles.input}
+          placeholder="Enter your username"
+          placeholderTextColor={"#aaaaaa"}
+          returnKeyType="done"
+          value={username}
+          onChangeText={(username) => setUsername(username)}
+        />
+        <TextInput
+          style={styles.input}
+          placeholder="Enter your email"
+          autoCapitalize="none"
+          autoCompleteType="email"
+          textContentType="emailAddress"
+          keyboardType="email-address"
+          placeholderTextColor={"#aaaaaa"}
+          returnKeyType="next"
+          value={email}
+          onChangeText={(email) => setEmail(email)}
+        />
+        <TextInput
+          style={styles.input}
+          secureTextEntry={true}
+          placeholder="Enter your password"
+          placeholderTextColor={"#aaaaaa"}
+          returnKeyType="done"
+          value={pass1}
+          onChangeText={(pass1) => setPass1(pass1)}
+        />
+        <TextInput
+          style={styles.input}
+          secureTextEntry={true}
+          placeholder="Enter your password"
+          placeholderTextColor={"#aaaaaa"}
+          returnKeyType="done"
+          value={pass2}
+          onChangeText={(pass2) => setPass2(pass2)}
+        />
+        <Button
+          style={styles.button}
+          title="Sign Up"
+          color={colors.gold}
+          onPress={signin}
+        />
+        <Link href="/login" style={styles.a}>
+          Already have an account? Log In!
+        </Link>
+      </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%",
+  },
+  a: {
+    color: "#FFF",
+    fontSize: 12,
+    fontStyle: "italic",
+    textDecorationLine: "underline",
+  },
+  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 SignupPage;