AniX/app/pages/Favorites.tsx

"use client";
import useSWRInfinite from "swr/infinite";
import { ReleaseSection } from "#/components/ReleaseSection/ReleaseSection";
import { Spinner } from "#/components/Spinner/Spinner";
import { useState, useEffect } from "react";
import { useScrollPosition } from "#/hooks/useScrollPosition";
import { useUserStore } from "../store/auth";
import { Button, Dropdown, DropdownItem } from "flowbite-react";
import { sort } from "./common";
import { ENDPOINTS } from "#/api/config";
import { useRouter } from "next/navigation";
import { useSWRfetcher } from "#/api/utils";

const DropdownTheme = {
  floating: {
    target: "w-fit md:min-w-[256px]",
  },
};

export function FavoritesPage() {
  const token = useUserStore((state) => state.token);
  const authState = useUserStore((state) => state.state);
  const [selectedSort, setSelectedSort] = useState(0);
  const router = useRouter();
  const [searchVal, setSearchVal] = useState("");

  const getKey = (pageIndex: number, previousPageData: any) => {
    if (previousPageData && !previousPageData.content.length) return null;
    if (token) {
      return `${ENDPOINTS.user.favorite}/all/${pageIndex}?token=${token}&sort=${sort.values[selectedSort].id}`;
    }
  };

  const { data, error, isLoading, size, setSize } = useSWRInfinite(
    getKey,
    useSWRfetcher,
    { initialSize: 2 }
  );

  const [content, setContent] = useState(null);
  useEffect(() => {
    if (data) {
      let allReleases = [];
      for (let i = 0; i < data.length; i++) {
        allReleases.push(...data[i].content);
      }
      setContent(allReleases);
    }
  }, [data]);

  const scrollPosition = useScrollPosition();
  useEffect(() => {
    if (scrollPosition >= 98 && scrollPosition <= 99) {
      setSize(size + 1);
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [scrollPosition]);

  useEffect(() => {
    if (authState === "finished" && !token) {
      router.push("/login?redirect=/favorites");
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [authState, token]);

  return (
    <>
      <form
        className="flex-1 max-w-full mx-4 mb-4"
        onSubmit={(e) => {
          e.preventDefault();
          router.push(`/search?q=${searchVal}&where=favorites`);
        }}
      >
        <label
          htmlFor="default-search"
          className="mb-2 text-sm font-medium text-gray-900 sr-only dark:text-white"
        >
          Search
        </label>
        <div className="relative">
          <div className="absolute inset-y-0 flex items-center pointer-events-none start-0 ps-3">
            <svg
              className="w-4 h-4 text-gray-500 dark:text-gray-400"
              aria-hidden="true"
              xmlns="http://www.w3.org/2000/svg"
              fill="none"
              viewBox="0 0 20 20"
            >
              <path
                stroke="currentColor"
                strokeLinecap="round"
                strokeLinejoin="round"
                strokeWidth="2"
                d="m19 19-4-4m0-7A7 7 0 1 1 1 8a7 7 0 0 1 14 0Z"
              />
            </svg>
          </div>
          <input
            type="search"
            id="default-search"
            className="block w-full p-4 text-sm text-gray-900 border border-gray-300 rounded-lg ps-10 bg-gray-50 focus:ring-blue-500 focus:border-blue-500 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"
            placeholder="Поиск аниме..."
            required
            value={searchVal}
            onChange={(e) => setSearchVal(e.target.value)}
          />
          <button
            type="submit"
            className="text-white absolute end-2.5 bottom-2.5 bg-blue-700 hover:bg-blue-800 focus:ring-4 focus:outline-none focus:ring-blue-300 font-medium rounded-lg text-sm px-4 py-2 dark:bg-blue-600 dark:hover:bg-blue-700 dark:focus:ring-blue-800"
          >
            Поиск
          </button>
        </div>
      </form>

      <div className="flex items-center justify-between px-4 py-2 border-b-2 border-black dark:border-white">
        <h1 className="font-bold text-md sm:text-xl md:text-lg xl:text-xl">
          Избранное
        </h1>
        <Dropdown
          label={sort.values[selectedSort].name}
          dismissOnClick={true}
          arrowIcon={false}
          color={"blue"}
          theme={DropdownTheme}
        >
          {sort.values.map((item, index) => (
            <DropdownItem key={index} onClick={() => setSelectedSort(index)}>
              <span
                className={`w-6 h-6 iconify ${
                  sort.values[index].value.split("_")[1] == "descending"
                    ? sort.descendingIcon
                    : sort.ascendingIcon
                }`}
              ></span>
              {item.name}
            </DropdownItem>
          ))}
        </Dropdown>
      </div>
      {content && content.length > 0 ? (
        <ReleaseSection content={content} />
      ) : isLoading ? (
        <div className="flex flex-col items-center justify-center min-w-full min-h-screen">
          <Spinner />
        </div>
      ) : (
        <div className="flex flex-col items-center justify-center min-w-full gap-4 mt-12 text-xl">
          <span className="w-24 h-24 iconify-color twemoji--broken-heart"></span>
          <p>В избранном пока ничего нет...</p>
        </div>
      )}
      {data &&
        data[data.length - 1].current_page <
          data[data.length - 1].total_page_count && (
          <Button
            className="w-full"
            color={"light"}
            onClick={() => setSize(size + 1)}
          >
            <div className="flex items-center gap-2">
              <span className="w-6 h-6 iconify mdi--plus-circle "></span>
              <span className="text-lg">Загрузить ещё</span>
            </div>
          </Button>
        )}
    </>
  );
}