refactor: enforce frontend view model boundaries

src/features/tbank-connection/ui/TbankConnectionSection/TbankConnectionSectionLoaded.tsx

@@ -8,19 +8,11 @@ import {
 	Stack,
 	Text,
 } from "@mantine/core";
-import { useQueryClient } from "@tanstack/react-query";
-import { useEffect, useRef, useState } from "react";
-import { useForm } from "react-hook-form";
-import { useTranslation } from "react-i18next";
 
-import { ApiErrorCode, apiErrorCode, apiQueryClient, isApiErrorCode } from "@/shared/api";
+import { ApiErrorCode, isApiErrorCode } from "@/shared/api";
 
-import {
-	commitTbankConnectionBoundary,
-	type TbankConnectionStatus,
-} from "../../model/connection-boundary";
-
-enum ConnectionErrorCode { RequestFailed = "REQUEST_ERROR" }
+import { type TbankConnectionStatus } from "../../model/connection-boundary";
+import { useTbankConnectionSectionLoadedVm } from "./TbankConnectionSectionLoaded.vm";
 
 type TbankConnectionSectionLoadedProps = {
 	refreshError: boolean;
@@ -32,48 +24,29 @@ type TbankConnectionSectionLoadedProps = {
 const TbankConnectionSectionLoaded: FC<TbankConnectionSectionLoadedProps> = (
 	props,
 ) => {
-	const { status } = props;
-	const { t } = useTranslation();
-	const queryClient = useQueryClient();
-	const [isDeleteOpened, setIsDeleteOpened] = useState(false);
-	const removalButtonRef = useRef<HTMLButtonElement>(null);
-	const [requestError, setRequestError] = useState<null | string>(null);
 	const {
-		formState: { errors },
-		handleSubmit,
+		errors,
+		isConnected,
+		isDeleteOpened,
+		isPending,
+		onCloseDisconnect,
+		onConfirmDisconnect,
+		onOpenDisconnect,
+		onSubmit,
 		register,
-		reset,
-	} = useForm<{ token: string }>();
-	const update = apiQueryClient.useMutation("put", "/api/v1/tbank-connection", {
-		onError: error => setRequestError(apiErrorCode(error) ?? ConnectionErrorCode.RequestFailed),
-		onSuccess: (data) => {
-			commitTbankConnectionBoundary(queryClient, data);
-			reset();
-		},
-	});
-	const remove = apiQueryClient.useMutation(
-		"delete",
-		"/api/v1/tbank-connection",
-		{
-			onSuccess: () => {
-				commitTbankConnectionBoundary(queryClient, {
-					connected: false,
-					connectedAt: /* eslint-disable-line unicorn/no-null -- The disconnected API snapshot requires a null connection timestamp. */ null,
-				});
-				setIsDeleteOpened(false);
-			},
-		},
-	);
-	const unavailableMessage = isApiErrorCode(requestError, ApiErrorCode.TbankUnavailable) ? "tbank.unavailable" : "tbank.requestError";
-	const isPending = update.isPending || remove.isPending;
-	const isConnected = status.connected;
-	useEffect(() => {
-		if (isDeleteOpened && remove.isError) removalButtonRef.current?.focus();
-	}, [isDeleteOpened, remove.isError]);
+		removalButtonRef,
+		remove,
+		requestError,
+		status,
+		t,
+		unavailableMessage,
+		update,
+	} = useTbankConnectionSectionLoadedVm(props);
 
 	return (
 		<Stack mt="xl">
 			<Text fw={600}>{t("tbank.title")}</Text>
+
 			<Text size="sm">
 				{isConnected
 					? t("tbank.connected", {
@@ -83,18 +56,22 @@ const TbankConnectionSectionLoaded: FC<TbankConnectionSectionLoadedProps> = (
 						})
 					: t("tbank.disconnected")}
 			</Text>
+
 			<Text c="dimmed" size="sm">
 				{t("tbank.hint")}
 			</Text>
+
 			{props.refreshing && (
 				<Text c="dimmed" role="status" size="sm">
 					{t("tbank.refreshing")}
 				</Text>
 			)}
+
 			{props.refreshError && (
 				<Alert aria-live="polite" color="orange" role="status">
 					<Stack gap="sm">
 						<Text>{t("tbank.refreshError")}</Text>
+
 						<Button
 							disabled={props.refreshing || isPending}
 							onClick={props.retry}
@@ -105,12 +82,8 @@ const TbankConnectionSectionLoaded: FC<TbankConnectionSectionLoadedProps> = (
 					</Stack>
 				</Alert>
 			)}
-			<form
-				onSubmit={handleSubmit(({ token }) => {
-					setRequestError(null);
-					update.mutate({ body: { token } });
-				})}
-			>
+
+			<form onSubmit={onSubmit}>
 				<fieldset disabled={isPending}>
 					<Stack>
 						<PasswordInput
@@ -118,6 +91,7 @@ const TbankConnectionSectionLoaded: FC<TbankConnectionSectionLoadedProps> = (
 							{...register("token", { required: t("tbank.tokenRequired") })}
 							error={errors.token?.message}
 						/>
+
 						{requestError && (
 							<Alert color="red">
 								{t(
@@ -127,42 +101,43 @@ const TbankConnectionSectionLoaded: FC<TbankConnectionSectionLoadedProps> = (
 								)}
 							</Alert>
 						)}
+
 						<Button loading={update.isPending} type="submit">
 							{t(isConnected ? "tbank.replace" : "tbank.connect")}
 						</Button>
+
 						{isConnected && (
-							<Button
-								color="red"
-								onClick={() => {
-									remove.reset();
-									setIsDeleteOpened(true);
-								}}
-								variant="outline"
-							>
+							<Button color="red" onClick={onOpenDisconnect} variant="outline">
 								{t("tbank.delete")}
 							</Button>
 						)}
 					</Stack>
 				</fieldset>
 			</form>
+
 			<Modal
-				closeButtonProps={{ "aria-label": t("tbank.close"), "disabled": isPending }}
+				closeButtonProps={{
+					"aria-label": t("tbank.close"),
+					"disabled": isPending,
+				}}
 				closeOnClickOutside={!isPending}
 				closeOnEscape={!isPending}
-				onClose={() => !isPending && setIsDeleteOpened(false)}
+				onClose={onCloseDisconnect}
 				opened={isDeleteOpened}
 				title={t("tbank.deleteTitle")}
 			>
 				<Stack>
 					<Text>{t("tbank.deleteText")}</Text>
+
 					{remove.isError && (
 						<Alert color="red">{t("tbank.requestError")}</Alert>
 					)}
+
 					<Button
 						color="red"
 						disabled={isPending}
 						loading={remove.isPending}
-						onClick={() => remove.mutate({})}
+						onClick={onConfirmDisconnect}
 						ref={removalButtonRef}
 					>
 						{t("tbank.deleteConfirm")}