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/*
This file is part of GNU Taler
(C) 2022 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
import { h, VNode } from "preact";
import { route } from "preact-router";
import { StateUpdater, useEffect, useRef, useState } from "preact/hooks";
import { PageStateType, usePageContext } from "../../context/pageState.js";
import { useTranslationContext } from "../../context/translation.js";
import { BackendStateType, useBackendState } from "../../hooks/backend.js";
import { bankUiSettings } from "../../settings.js";
import { getBankBackendBaseUrl, undefinedIfEmpty } from "../../utils.js";
import { ShowInputErrorLabel } from "./ShowInputErrorLabel.js";
/**
* Collect and submit login data.
*/
export function LoginForm(): VNode {
const [backendState, backendStateSetter] = useBackendState();
const { pageState, pageStateSetter } = usePageContext();
const [username, setUsername] = useState<string | undefined>();
const [password, setPassword] = useState<string | undefined>();
const { i18n } = useTranslationContext();
const ref = useRef<HTMLInputElement>(null);
useEffect(() => {
ref.current?.focus();
}, []);
const errors = undefinedIfEmpty({
username: !username ? i18n.str`Missing username` : undefined,
password: !password ? i18n.str`Missing password` : undefined,
});
return (
<div class="login-div">
<form action="javascript:void(0);" class="login-form" noValidate>
<div class="pure-form">
<h2>{i18n.str`Please login!`}</h2>
<p class="unameFieldLabel loginFieldLabel formFieldLabel">
<label for="username">{i18n.str`Username:`}</label>
</p>
<input
ref={ref}
autoFocus
type="text"
name="username"
id="username"
value={username ?? ""}
placeholder="Username"
required
onInput={(e): void => {
setUsername(e.currentTarget.value);
}}
/>
<ShowInputErrorLabel
message={errors?.username}
isDirty={username !== undefined}
/>
<p class="passFieldLabel loginFieldLabel formFieldLabel">
<label for="password">{i18n.str`Password:`}</label>
</p>
<input
type="password"
name="password"
id="password"
value={password ?? ""}
placeholder="Password"
required
onInput={(e): void => {
setPassword(e.currentTarget.value);
}}
/>
<ShowInputErrorLabel
message={errors?.password}
isDirty={password !== undefined}
/>
<br />
<button
type="submit"
class="pure-button pure-button-primary"
disabled={!!errors}
onClick={() => {
if (!username || !password) return;
loginCall(
{ username, password },
backendStateSetter,
pageStateSetter,
);
setUsername(undefined);
setPassword(undefined);
}}
>
{i18n.str`Login`}
</button>
{bankUiSettings.allowRegistrations ? (
<button
class="pure-button pure-button-secondary btn-cancel"
onClick={() => {
route("/register");
}}
>
{i18n.str`Register`}
</button>
) : (
<div />
)}
</div>
</form>
</div>
);
}
async function loginCall(
req: { username: string; password: string },
/**
* FIXME: figure out if the two following
* functions can be retrieved from the state.
*/
backendStateSetter: StateUpdater<BackendStateType | undefined>,
pageStateSetter: StateUpdater<PageStateType>,
): Promise<void> {
/**
* Optimistically setting the state as 'logged in', and
* let the Account component request the balance to check
* whether the credentials are valid. */
pageStateSetter((prevState) => ({ ...prevState, isLoggedIn: true }));
let baseUrl = getBankBackendBaseUrl();
if (!baseUrl.endsWith("/")) baseUrl += "/";
backendStateSetter((prevState) => ({
...prevState,
url: baseUrl,
username: req.username,
password: req.password,
}));
}
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