adminFront/src/api/promocode/swr.ts

import { CreatePromocodeBody, PromocodeList } from "@root/model/promocodes";
import { enqueueSnackbar } from "notistack";
import { useCallback, useRef } from "react";
import useSwr, { mutate } from "swr";
import { promocodeApi } from "./requests";


export function usePromocodes(page: number, pageSize: number) {
    const promocodesCountRef = useRef<number>(0);
    const swrResponse = useSwr(
        ["promocodes", page, pageSize],
        async (key) => {
            const result = await promocodeApi.getPromocodeList({
                limit: key[2],
                filter: {
                    active: true,
                },
                page: key[1],
            });

            promocodesCountRef.current = result.count;
            return result;
        },
        {
            onError(err) {
                console.log("Error fetching promocodes", err);
                enqueueSnackbar(err.message, { variant: "error" });
            },
            focusThrottleInterval: 60e3,
            keepPreviousData: true,
        }
    );

    const createPromocode = useCallback(async function (body: CreatePromocodeBody) {
        try {
            await promocodeApi.createPromocode(body);
            mutate(["promocodes", page, pageSize]);
        } catch (error) {
            console.log("Error creating promocode", error);
            if (error instanceof Error) enqueueSnackbar(error.message, { variant: "error" });
        }
    }, [page, pageSize]);

    const deletePromocode = useCallback(async function (id: string) {
        try {
            await mutate<PromocodeList | undefined, void>(
                ["promocodes", page, pageSize],
                promocodeApi.deletePromocode(id),
                {
                    optimisticData(currentData, displayedData) {
                        if (!displayedData) return;

                        return {
                            count: displayedData.count - 1,
                            items: displayedData.items.filter((item) => item.id !== id),
                        };
                    },
                    rollbackOnError: true,
                    populateCache(result, currentData) {
                        if (!currentData) return;

                        return {
                            count: currentData.count - 1,
                            items: currentData.items.filter((item) => item.id !== id),
                        };
                    },
                }
            );
        } catch (error) {
            console.log("Error deleting promocode", error);
            if (error instanceof Error) enqueueSnackbar(error.message, { variant: "error" });
        }
    }, [page, pageSize]);

    return {
        ...swrResponse,
        createPromocode,
        deletePromocode,
        promocodesCount: promocodesCountRef.current,
    };
}