More styling

src/LoginPage.jsx

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+/*
+Copyright 2021 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { useCallback, useRef } from "react";
+import { useHistory, useLocation, Link } from "react-router-dom";
+import { Header, LeftNav } from "./Header";
+import { FieldRow, InputField, Button, ErrorMessage } from "./Input";
+import { Center, Content, Info, Modal } from "./Layout";
+
+export function LoginPage({ onLogin, error }) {
+  const loginUsernameRef = useRef();
+  const loginPasswordRef = useRef();
+  const history = useHistory();
+  const location = useLocation();
+
+  const onSubmitLoginForm = useCallback(
+    (e) => {
+      e.preventDefault();
+      onLogin(
+        loginUsernameRef.current.value,
+        loginPasswordRef.current.value,
+        () => {
+          if (location.state && location.state.from) {
+            history.replace(location.state.from);
+          } else {
+            history.replace("/");
+          }
+        }
+      );
+    },
+    [onLogin, location, history]
+  );
+
+  return (
+    <>
+      <Header>
+        <LeftNav />
+      </Header>
+      <Content>
+        <Center>
+          <Modal>
+            <h2>Login</h2>
+            <form onSubmit={onSubmitLoginForm}>
+              <FieldRow>
+                <InputField
+                  type="text"
+                  ref={loginUsernameRef}
+                  placeholder="Username"
+                  label="Username"
+                />
+              </FieldRow>
+              <FieldRow>
+                <InputField
+                  type="password"
+                  ref={loginPasswordRef}
+                  placeholder="Password"
+                  label="Password"
+                />
+              </FieldRow>
+              {error && (
+                <FieldRow>
+                  <ErrorMessage>{error.message}</ErrorMessage>
+                </FieldRow>
+              )}
+              <FieldRow rightAlign>
+                <Button type="submit">Login</Button>
+              </FieldRow>
+            </form>
+            <Info>
+              New?{" "}
+              <Link
+                to={{
+                  pathname: "/register",
+                  state: location.state,
+                }}
+              >
+                Create account
+              </Link>
+            </Info>
+          </Modal>
+        </Center>
+      </Content>
+    </>
+  );
+}