tiefen_space_app/screeens/Posts/FeedPosts/index.jsx

import {
  View,
  RefreshControl,
  ActivityIndicator,
  Image as NativeImage,
  Text,
  TouchableOpacity,
} from "react-native";
import React, { useState, useEffect } from "react";
import Empty from "../../../components/Empty";
import { useTailwind } from "tailwind-rn";
import baseRequest from "../../../utils/baseRequest";
import Toast from "react-native-toast-message";
import { generateSignature } from "../../../utils/crypto";
import { FlashList } from "@shopify/flash-list";
import Post from "../../../components/Post";
import { useNavigation } from "@react-navigation/native";

export default function FeedPosts({ blur }) {
  const navigation = useNavigation();
  //获取当前时间
  const [currentTime, setCurrentTime] = useState();
  const getCurrentTime = async () => {
    setCurrentTime(Math.floor(new Date().getTime() / 1000));
  };

  //获取截止当前时间的动态数据
  const [data, setData] = useState([]);
  const [offset, setOffset] = useState(0);
  const [more, setMore] = useState(1);
  const [isActivityIndicatorShow, setIsActivityIndicatorShow] = useState(true);
  const getData = async (type) => {
    if (!currentTime) return;
    if (data.length === 0 && type === "bottom") return;
    if (!more && type === "bottom") {
      setIsActivityIndicatorShow(false);
      return;
    }
    setIsActivityIndicatorShow(true);
    try {
      const apiUrl = process.env.EXPO_PUBLIC_API_URL;
      const base = await baseRequest();
      const signature = await generateSignature({
        ct_upper_bound: currentTime,
        offset: offset,
        limit: 4,
        ...base,
      });
      const _response = await fetch(
        `${apiUrl}/api/moment/list?signature=${signature}`,
        {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
          },
          body: JSON.stringify({
            ct_upper_bound: currentTime,
            offset: offset,
            limit: 4,
            ...base,
          }),
        }
      );
      const _data = await _response.json();
      if (_data.ret === -1) {
        Toast.show({
          type: "error",
          text1: _data.msg,
          topOffset: 60,
        });
        return;
      }
      if (type === "top") {
        setData((prev) => _data.data.list);
      } else {
        setData((prev) => [...prev, ..._data.data.list]);
      }
      setOffset(_data.data.offset);
      setMore(_data.data.more);
    } catch (error) {
      console.error(error);
    }
  };

  //获取当前时间
  useEffect(() => {
    getCurrentTime();
  }, []);

  //当时间改变，获取新数据
  useEffect(() => {
    getData("top");
  }, [currentTime]);

  const tailwind = useTailwind();
  const renderItem = ({ item }) => <Post blur={blur} data={item} />;
  const [refreshing, setRefreshing] = useState(false);
  //下拉刷新
  const handleRefresh = async () => {
    setRefreshing(true);
    setOffset(0);
    setMore(1);
    await getCurrentTime();
    setRefreshing(false);
  };

  return (
    <View style={tailwind("flex-1")}>
      <FlashList
        data={data}
        renderItem={renderItem}
        estimatedItemSize={310}
        initialNumToRender={4}
        refreshControl={
          <RefreshControl
            colors={["#FF669E"]}
            tintColor="white"
            refreshing={refreshing}
            onRefresh={() => handleRefresh()}
          />
        }
        onEndReached={() => getData("bottom")}
        ListEmptyComponent={<Empty type="nodata" />}
        ListFooterComponent={
          <View>
            {isActivityIndicatorShow && data.length !== 0 && (
              <ActivityIndicator style={tailwind("my-4")} size="large" />
            )}
          </View>
        }
        keyExtractor={(item) => item.id}
      />
      {blur && (
        <View
          style={tailwind(
            "flex flex-row items-center justify-between h-12 bg-[#301024] px-4"
          )}
        >
          <View style={tailwind("flex flex-row items-center")}>
            <NativeImage
              source={require("../../../assets/icon/others/vipbig.png")}
            />
            <Text style={tailwind("text-[#FF669E] text-base font-medium ml-1")}>
              开通会员订阅动态
            </Text>
          </View>
          <TouchableOpacity
            onPress={() =>
              navigation.navigate("WebWithoutHeader", {
                uri: process.env.EXPO_PUBLIC_WEB_URL + "/vip",
              })
            }
            style={tailwind(
              "flex justify-center items-center h-9 bg-[#FF669E] rounded-full px-4"
            )}
          >
            <Text style={tailwind("text-white text-sm font-medium")}>
              ¥99/永久
            </Text>
          </TouchableOpacity>
        </View>
      )}
    </View>
  );
}