From 05ccb4d8f1bbe3fb64e117136b4a89bcfb0b0b33 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Tue, 27 Oct 2020 19:21:35 +0800
Subject: Split front and back end.

---
 FrontEnd/src/app/views/login/index.tsx  | 151 ++++++++++++++++++++++++++++++++
 FrontEnd/src/app/views/login/login.sass |   2 +
 2 files changed, 153 insertions(+)
 create mode 100644 FrontEnd/src/app/views/login/index.tsx
 create mode 100644 FrontEnd/src/app/views/login/login.sass

(limited to 'FrontEnd/src/app/views/login')

diff --git a/FrontEnd/src/app/views/login/index.tsx b/FrontEnd/src/app/views/login/index.tsx
new file mode 100644
index 00000000..61b9a525
--- /dev/null
+++ b/FrontEnd/src/app/views/login/index.tsx
@@ -0,0 +1,151 @@
+import React from "react";
+import { useHistory } from "react-router";
+import { useTranslation } from "react-i18next";
+import { Container, Form } from "react-bootstrap";
+
+import { useUser, userService } from "@/services/user";
+
+import AppBar from "../common/AppBar";
+import LoadingButton from "../common/LoadingButton";
+
+const LoginPage: React.FC = (_) => {
+  const { t } = useTranslation();
+  const history = useHistory();
+  const [username, setUsername] = React.useState<string>("");
+  const [usernameDirty, setUsernameDirty] = React.useState<boolean>(false);
+  const [password, setPassword] = React.useState<string>("");
+  const [passwordDirty, setPasswordDirty] = React.useState<boolean>(false);
+  const [rememberMe, setRememberMe] = React.useState<boolean>(true);
+  const [process, setProcess] = React.useState<boolean>(false);
+  const [error, setError] = React.useState<string | null>(null);
+
+  const user = useUser();
+
+  React.useEffect(() => {
+    if (user != null) {
+      const id = setTimeout(() => history.push("/"), 3000);
+      return () => {
+        clearTimeout(id);
+      };
+    }
+  }, [history, user]);
+
+  if (user != null) {
+    return (
+      <>
+        <AppBar />
+        <p className="mt-appbar">{t("login.alreadyLogin")}</p>
+      </>
+    );
+  }
+
+  const submit = (): void => {
+    if (username === "" || password === "") {
+      setUsernameDirty(true);
+      setPasswordDirty(true);
+      return;
+    }
+
+    setProcess(true);
+    userService
+      .login(
+        {
+          username: username,
+          password: password,
+        },
+        rememberMe
+      )
+      .then(
+        () => {
+          if (history.length === 0) {
+            history.push("/");
+          } else {
+            history.goBack();
+          }
+        },
+        (e: Error) => {
+          setProcess(false);
+          setError(e.message);
+        }
+      );
+  };
+
+  const onEnterPressInPassword: React.KeyboardEventHandler = (e) => {
+    if (e.key === "Enter") {
+      submit();
+    }
+  };
+
+  return (
+    <Container fluid className="login-container mt-2">
+      <h1 className="text-center">{t("welcome")}</h1>
+      <Form>
+        <Form.Group>
+          <Form.Label htmlFor="username">{t("user.username")}</Form.Label>
+          <Form.Control
+            id="username"
+            disabled={process}
+            onChange={(e) => {
+              setUsername(e.target.value);
+              setUsernameDirty(true);
+            }}
+            value={username}
+            isInvalid={usernameDirty && username === ""}
+          />
+          {usernameDirty && username === "" && (
+            <Form.Control.Feedback type="invalid">
+              {t("login.emptyUsername")}
+            </Form.Control.Feedback>
+          )}
+        </Form.Group>
+        <Form.Group>
+          <Form.Label htmlFor="password">{t("user.password")}</Form.Label>
+          <Form.Control
+            id="password"
+            type="password"
+            disabled={process}
+            onChange={(e) => {
+              setPassword(e.target.value);
+              setPasswordDirty(true);
+            }}
+            value={password}
+            onKeyDown={onEnterPressInPassword}
+            isInvalid={passwordDirty && password === ""}
+          />
+          {passwordDirty && password === "" && (
+            <Form.Control.Feedback type="invalid">
+              {t("login.emptyPassword")}
+            </Form.Control.Feedback>
+          )}
+        </Form.Group>
+        <Form.Group>
+          <Form.Check<"input">
+            id="remember-me"
+            type="checkbox"
+            checked={rememberMe}
+            onChange={(e) => {
+              setRememberMe(e.currentTarget.checked);
+            }}
+            label={t("user.rememberMe")}
+          />
+        </Form.Group>
+        {error ? <p className="text-danger">{t(error)}</p> : null}
+        <div className="text-right">
+          <LoadingButton
+            loading={process}
+            variant="primary"
+            onClick={(e) => {
+              submit();
+              e.preventDefault();
+            }}
+            disabled={username === "" || password === "" ? true : undefined}
+          >
+            {t("user.login")}
+          </LoadingButton>
+        </div>
+      </Form>
+    </Container>
+  );
+};
+
+export default LoginPage;
diff --git a/FrontEnd/src/app/views/login/login.sass b/FrontEnd/src/app/views/login/login.sass
new file mode 100644
index 00000000..0bf385f5
--- /dev/null
+++ b/FrontEnd/src/app/views/login/login.sass
@@ -0,0 +1,2 @@
+.login-container
+  max-width: 600px
-- 
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