12_login_logout

client/src/App.css

@@ -4,3 +4,8 @@
   font-size: 2rem;
   margin-top: 10px;
 }
+
+.form-container {
+  width: 400px;
+  margin: 0 auto;
+}

client/src/App.js

@@ -10,8 +10,11 @@ import Register from "./pages/Register";
 import MenuBar from "./components/MenuBar";
 import "./App.css";
 
+import { AuthProvider } from "./context/auth";
+
 function App() {
   return (
+    <AuthProvider>
       <Router>
         <Container>
           <MenuBar />
@@ -20,6 +23,7 @@ function App() {
           <Route exact path="/register" component={Register} />
         </Container>
       </Router>
+    </AuthProvider>
   );
 }
 

client/src/context/auth.js

+import React, { createContext, useReducer } from "react";
+
+const AuthContext = createContext({
+  user: null,
+  login: userData => {},
+  logout: () => {}
+});
+
+function authReducer(state, action) {
+  switch (action.type) {
+    case "LOGIN":
+      return {
+        ...state,
+        user: action.payload
+      };
+    case "LOGOUT":
+      return {
+        ...state,
+        user: null
+      };
+
+    default:
+      return state;
+  }
+}
+
+function AuthProvider(props) {
+  const [state, dispatch] = useReducer(authReducer, { user: null });
+
+  function login(userData) {
+    dispatch({
+      type: "LOGIN",
+      payload: userData
+    });
+  }
+
+  function logout() {
+    dispatch({
+      type: "LOGOUT"
+    });
+  }
+
+  return (
+    <AuthContext.Provider
+      value={{ user: state.user, login, logout }}
+      {...props}
+    />
+  );
+}
+
+export { AuthContext, AuthProvider };

client/src/pages/Login.js

-import React from "react";
+import React, { useState, useContext } from "react";
+import { Form, Button } from "semantic-ui-react";
+import gql from "graphql-tag";
+import { useMutation } from "@apollo/react-hooks";
+import { useForm } from "../utils/hook";
+import { AuthContext } from "../context/auth";
+
+const Login = props => {
+  const context = useContext(AuthContext);
+  const [errors, setErrors] = useState({});
+
+  const { onChange, onSubmit, values } = useForm(loginUser, {
+    username: "",
+    password: ""
+  });
+
+  const [addUser, { loading }] = useMutation(LOGIN_USER, {
+    update(
+      _,
+      {
+        data: { login: userData }
+      }
+    ) {
+      context.login(userData);
+      props.history.push("/");
+    },
+    onError(err) {
+      setErrors(err.graphQLErrors[0].extensions.exception.errors);
+    },
+    variables: values
+  });
+
+  function loginUser() {
+    addUser();
+  }
 
-function Login() {
   return (
-    <div>
-      <h1>Login page</h1>
+    <div className="form-container">
+      <Form onSubmit={onSubmit} noValidate className={loading ? "loading" : ""}>
+        <h1>Login</h1>
+        <Form.Input
+          label="Username"
+          placeholder="Username..."
+          name="username"
+          type="text"
+          error={errors.username ? true : false}
+          value={values.username}
+          onChange={onChange}
+        ></Form.Input>
+
+        <Form.Input
+          label="Password"
+          placeholder="Password..."
+          name="password"
+          type="password"
+          error={errors.password ? true : false}
+          value={values.password}
+          onChange={onChange}
+        ></Form.Input>
+
+        <Button type="submit" primary>
+          Login
+        </Button>
+      </Form>
+
+      {Object.keys(errors).length > 0 && (
+        <div className="ui error message">
+          <ul className="list">
+            {Object.values(errors).map(value => (
+              <li key={value}>{value} </li>
+            ))}
+          </ul>
+        </div>
+      )}
     </div>
   );
-}
+};
+
+const LOGIN_USER = gql`
+  mutation login($username: String!, $password: String!) {
+    login(username: $username, password: $password) {
+      id
+      email
+      username
+      createdAt
+      token
+    }
+  }
+`;
 
 export default Login;

client/src/pages/Register.js

-import React from "react";
+import React, { useState, useContext } from "react";
+import { Form, Button } from "semantic-ui-react";
+import gql from "graphql-tag";
+import { useMutation } from "@apollo/react-hooks";
+import { useForm } from "../utils/hook";
+import { AuthContext } from "../context/auth";
+
+const Register = props => {
+  const context = useContext(AuthContext);
+  const [errors, setErrors] = useState({});
+
+  const { onChange, onSubmit, values } = useForm(registerUser, {
+    username: "",
+    email: "",
+    password: "",
+    confirmPassword: ""
+  });
+
+  const [addUser, { loading }] = useMutation(REGISTER_USER, {
+    update(
+      _,
+      {
+        data: { register: userData }
+      }
+    ) {
+      context.login(userData);
+      props.history.push("/");
+    },
+    onError(err) {
+      setErrors(err.graphQLErrors[0].extensions.exception.errors);
+    },
+    variables: values
+  });
+
+  function registerUser() {
+    addUser();
+  }
 
-function Register() {
   return (
-    <div>
-      <h1>Register page</h1>
+    <div className="form-container">
+      <Form onSubmit={onSubmit} noValidate className={loading ? "loading" : ""}>
+        <h1>Register</h1>
+        <Form.Input
+          label="Username"
+          placeholder="Username..."
+          name="username"
+          type="text"
+          error={errors.username ? true : false}
+          value={values.username}
+          onChange={onChange}
+        ></Form.Input>
+
+        <Form.Input
+          label="Email"
+          placeholder="Email..."
+          name="email"
+          type="email"
+          error={errors.email ? true : false}
+          value={values.email}
+          onChange={onChange}
+        ></Form.Input>
+
+        <Form.Input
+          label="Password"
+          placeholder="Password..."
+          name="password"
+          type="password"
+          error={errors.password ? true : false}
+          value={values.password}
+          onChange={onChange}
+        ></Form.Input>
+
+        <Form.Input
+          label="Confirm Password"
+          placeholder="Password..."
+          name="confirmPassword"
+          type="password"
+          error={errors.confirmPassword ? true : false}
+          value={values.confirmPassword}
+          onChange={onChange}
+        ></Form.Input>
+
+        <Button type="submit" primary>
+          Register
+        </Button>
+      </Form>
+
+      {Object.keys(errors).length > 0 && (
+        <div className="ui error message">
+          <ul className="list">
+            {Object.values(errors).map(value => (
+              <li key={value}>{value} </li>
+            ))}
+          </ul>
+        </div>
+      )}
     </div>
   );
-}
+};
+
+const REGISTER_USER = gql`
+  mutation register(
+    $username: String!
+    $email: String!
+    $password: String!
+    $confirmPassword: String!
+  ) {
+    register(
+      registerInput: {
+        username: $username
+        email: $email
+        password: $password
+        confirmPassword: $confirmPassword
+      }
+    ) {
+      id
+      email
+      username
+      createdAt
+      token
+    }
+  }
+`;
 
 export default Register;

client/src/utils/hook.js

+import { useState } from "react";
+
+export const useForm = (callback, initialState = {}) => {
+  const [values, setValues] = useState(initialState);
+
+  const onChange = event => {
+    setValues({ ...values, [event.target.name]: event.target.value });
+  };
+
+  const onSubmit = event => {
+    event.preventDefault();
+    callback();
+  };
+
+  return {
+    onChange,
+    onSubmit,
+    values
+  };
+};