tiefen_space_app/components/ImageViewer/index.jsx

import {
  View,
  Text,
  Modal,
  TouchableOpacity,
  ActivityIndicator,
  Platform,
} from "react-native";
import React, { useState, useCallback, useEffect } from "react";
import { ImageViewer as OriginImageViewer } from "react-native-image-zoom-viewer";
import { Icon } from "@rneui/themed";
import { useTailwind } from "tailwind-rn";
import { useSafeAreaInsets } from "react-native-safe-area-context";
import saveImage from "../../utils/saveImage";
import Toast from "react-native-toast-message";
import { get } from "../../utils/storeInfo";
import { useNavigation } from "@react-navigation/native";
import MyModal from "../MyModal";
import { Image } from "expo-image";
import { Button } from "@rneui/themed";
import { LinearGradient } from "expo-linear-gradient";
import { generateSignature } from "../../utils/crypto";
import baseRequest from "../../utils/baseRequest";

//imageUrls      [{ url: string , id: int }]  网络图片需要查看原图时才传id，其他情况不用
//index          int
//lockedStartIndex    int
//onPressUnlockBtn  () => void

export function ImageViewer({
  isShow,
  onClose,
  onChange,
  imageUrls,
  index,
  lockedStartIndex,
  onPressUnlockBtn,
  setImageViewerProps,
}) {
  const tailwind = useTailwind();
  const insets = useSafeAreaInsets();

  const navigation = useNavigation();

  const [isVisible, setIsVisible] = useState(false);
  useEffect(() => {
    setIsVisible(isShow);
  }, [isShow]);

  const closeImageViewer = () => {
    setIsVisible(false);
    onClose && onClose();
  };

  const checkRole = useCallback(async () => {
    const account = await get("account");
    const role = account.role;
    const isVip = account.is_a_member;
    if (role !== 0 || isVip === 1) return true;
    return false;
  }, []);

  const [isVipModalVisible, setIsVipModalVisible] = useState(false);
  const [isSaving, setIsSaving] = useState(false);
  const hanldSaveImage = async (index) => {
    const isVip = await checkRole();
    if (!isVip) {
      setIsVipModalVisible(true);
      return;
    }
    if (isSaving) return;
    setIsSaving(true);
    await saveImage(imageUrls[index].url);
    setIsSaving(false);
  };

  //查看原图
  const handleCheckOriginalImage = async (index) => {
    const isVip = await checkRole();
    if (!isVip) {
      setIsVipModalVisible(true);
      return;
    }
    const apiUrl = process.env.EXPO_PUBLIC_API_URL;
    try {
      const base = await baseRequest();
      const body = {
        image_id: imageUrls[index].id,
        ...base,
      };
      const signature = await generateSignature(body);
      const _response = await fetch(
        `${apiUrl}/api/previews/original_image?signature=${signature}`,
        {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
          },
          body: JSON.stringify(body),
        }
      );
      const _data = await _response.json();
      if (_data.ret === -1) {
        Toast.show({
          type: "error",
          text1: _data.msg,
          topOffset: 60,
        });
        return;
      }
      setImageViewerProps((prev) => {
        let newImageViewerProps = prev;
        newImageViewerProps.imageUrls[index] = {
          id: imageUrls[index].id,
          url: _data?.data?.urls[0],
        };
        return { ...newImageViewerProps };
      });
      Toast.show({
        type: "success",
        text1: "已切换至原图",
        topOffset: 60,
      });
    } catch (error) {
      console.error(error);
    }
  };

  return (
    <Modal visible={isVisible} statusBarTranslucent transparent={true}>
      <OriginImageViewer
        imageUrls={imageUrls}
        index={index}
        onClick={closeImageViewer}
        onSwipeDown={closeImageViewer}
        onChange={onChange ? (index) => onChange(index) : () => null}
        enableSwipeDown
        backgroundColor="#07050A"
        renderImage={(props) => {
          if (index >= lockedStartIndex) {
            return (
              <View>
                <Image
                  {...props}
                  blurRadius={Platform.OS === "ios" ? 100 : 10}
                />
                <View
                  style={tailwind(
                    "absolute flex justify-center items-center top-0 left-0 bg-[#00000080] w-full h-full"
                  )}
                >
                  <Button
                    onPress={() => {
                      closeImageViewer();
                      onPressUnlockBtn();
                    }}
                    ViewComponent={LinearGradient}
                    radius="999"
                    size="md"
                    linearGradientProps={{
                      colors: ["#FF668B", "#FF66F0"],
                      start: { x: 0, y: 0.5 },
                      end: { x: 1, y: 0.5 },
                    }}
                    titleStyle={tailwind("text-base font-medium")}
                    containerStyle={tailwind("w-3/4 px-4")}
                  >
                    立即解锁
                  </Button>
                </View>
              </View>
            );
          }
          return <Image {...props} />;
        }}
        renderFooter={(index) => (
          <View style={tailwind("flex flex-row items-center")}>
            <TouchableOpacity
              onPress={() => hanldSaveImage(index)}
              style={{
                marginLeft: 20,
                marginBottom: insets.bottom,
                ...tailwind(
                  "flex justify-center items-center w-14 h-14 bg-[#FFFFFF1A] rounded-full"
                ),
              }}
            >
              {isSaving && <ActivityIndicator size="small" />}
              {!isSaving && (
                <Icon
                  type="ionicon"
                  name="save-outline"
                  size={20}
                  color="white"
                />
              )}
              <Text
                style={tailwind("text-xs text-[#FFFFFF80] font-medium mt-1")}
              >
                保存
              </Text>
            </TouchableOpacity>
            {imageUrls[index]?.id && (
              <TouchableOpacity
                onPress={() => handleCheckOriginalImage(index)}
                style={{
                  marginLeft: 20,
                  marginBottom: insets.bottom,
                  ...tailwind(
                    "flex justify-center items-center w-14 h-14 bg-[#FFFFFF1A] rounded-full"
                  ),
                }}
              >
                <Icon
                  type="ionicon"
                  name="image-outline"
                  size={20}
                  color="white"
                />
                <Text
                  style={tailwind("text-xs text-[#FFFFFF80] font-medium mt-1")}
                >
                  原图
                </Text>
              </TouchableOpacity>
            )}
          </View>
        )}
        onSave={(url) => {
          saveImage(url);
        }}
        saveToLocalByLongPress={false}
        loadingRender={() => <ActivityIndicator size="large" />}
      />
      <Toast />
      <MyModal
        visible={isVipModalVisible}
        setVisible={setIsVipModalVisible}
        title="是否开通会员？"
        content="会员可无限制保存图片、查看原图，一次开通永久有效。"
        cancel={() => {
          setIsVipModalVisible(false);
        }}
        confirm={() => {
          setIsVipModalVisible(false);
          closeImageViewer();
          navigation.navigate("WebWithoutHeader", {
            uri: process.env.EXPO_PUBLIC_WEB_URL + "/vip",
          });
        }}
      />
    </Modal>
  );
}