Clean/lib/module/photo_preview/photo_preview_controller.dart

import 'dart:async';

import 'package:clean/base/base_controller.dart';
import 'package:clean/data/bean/photos_type.dart';
import 'package:clean/module/image_picker/image_picker_util.dart';
import 'package:clean/module/people_photo/people_photo_controller.dart';
import 'package:clean/module/people_photo/photo_group.dart';
import 'package:clean/module/screenshots_blurry/screenshots_controller.dart';
import 'package:clean/module/similar_photo/similar_photo_controller.dart';
import 'package:flutter/Material.dart';
import 'package:flutter_card_swiper/flutter_card_swiper.dart';
import 'package:get/get.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';


class PhotoPreviewController extends BaseController {
  Rx<CardSwiperController> cardSwiperController = CardSwiperController().obs;
  final RxList<AssetEntity> photoGroups = <AssetEntity>[].obs;
  final RxSet<String> selectedPhotosIds = <String>{}.obs;

  RxInt groupIndex = 0.obs;

  late PhotosType photosType;
  late String? currentImageId;
  RxDouble selectedFilesSize = 0.0.obs;
  RxInt selectedFileCount = 0.obs;

  @override
  void onInit() {
    super.onInit();

    print('PhotoPreviewController onInit');
    _getArgs(); // 获取传递的参数
    _initData(); // 初始化数据

    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (currentImageId != null) {
        for (int i = 0; i < photoGroups.length; i++) {
          if (photoGroups[i].id == currentImageId) {
            print('photoGroups[i].id ${photoGroups[i].id},i $i');
            groupIndex.value = i;
            cardSwiperController.value.moveTo(i);
            break;
          }
        }
      }
    });
  }

  // 获取参数
  void _getArgs() {
    photosType = parameters?['photosType'];
    currentImageId = parameters?['currentImageId'];
  }

  void _initData() {
    photoGroups.clear();
    selectedPhotosIds.clear();

    switch(photosType) {
      case PhotosType.peoplePhotos:
        photoGroups.assignAll(ImagePickerUtil.peoplePhotos);
        selectedPhotosIds.assignAll(ImagePickerUtil.selectedPeoplePhotosIds);
        selectedFileCount.value = ImagePickerUtil.selectedPeoplePhotosIds.length;
        break;
      case PhotosType.screenshots:
        photoGroups.assignAll(ImagePickerUtil.screenshotPhotos);
        selectedPhotosIds.assignAll(ImagePickerUtil.selectedScreenshotPhotosIds);
        selectedFileCount.value = ImagePickerUtil.selectedScreenshotPhotosIds.length;
        break;
      case PhotosType.similarPhotos:
        for (var group in ImagePickerUtil.similarPhotos) {
          photoGroups.addAll(group);
        }
        selectedPhotosIds.assignAll(ImagePickerUtil.selectedSimilarPhotosIds);
        selectedFileCount.value = ImagePickerUtil.selectedSimilarPhotosIds.length;
        break;
      case PhotosType.locationPhotos:
        for (var group in ImagePickerUtil.locationPhotos.values) {
          photoGroups.addAll(group);
        }
        selectedPhotosIds.assignAll(ImagePickerUtil.selectedLocationPhotosIds);
        selectedFileCount.value = ImagePickerUtil.selectedLocationPhotosIds.length;
        break;
        case PhotosType.blurryPhotos:
        photoGroups.assignAll(ImagePickerUtil.blurryPhotos);
        selectedPhotosIds.assignAll(ImagePickerUtil.selectedBlurryPhotosIds);
        selectedFileCount.value = ImagePickerUtil.selectedBlurryPhotosIds.length;
        break;
    }
    updateSelectedFilesSize();

  }

  Future<void> updateSelectedFilesSize() async {
    double totalSize = 0;
    // 通过selectedPhotosIds获取选中的图片，然后计算大小
    for (var id in selectedPhotosIds) {
      final entity = await AssetEntity.fromId(id);
      if (entity != null) {
        final file = await entity.file;
        if (file != null) {
          totalSize += await file.length();
        }
      }
    }

    selectedFilesSize.value = totalSize / 1024; // Convert to KB
  }

  void recoverSelectPhoto() {
    cardSwiperController.value.undo();
  }

  void clickSelect() {


    cardSwiperController.value.swipe(CardSwiperDirection.left);
  }

  @override
  void onClose() {
    super.onClose();

    // 清理操作，释放资源
    cardSwiperController.value.dispose();

  }

  void clickBack() {

    _saveSelectedPhotos(photosType);
    Get.back();
  }

  // // 保存选择的图片ID列表
  void _saveSelectedPhotos(PhotosType type) {
    switch (type) {
      case PhotosType.peoplePhotos:
        ImagePickerUtil.selectedPeoplePhotosIds.assignAll(selectedPhotosIds);
        PeoplePhotoController controller = Get.find<PeoplePhotoController>();
        controller.restoreSelections();
        break;
      case PhotosType.screenshots:
        ImagePickerUtil.selectedScreenshotPhotosIds.assignAll(selectedPhotosIds);
        ScreenShotsController controller = Get.find<ScreenShotsController>();
        controller.restoreSelections();
        break;
      case PhotosType.similarPhotos:
        ImagePickerUtil.selectedSimilarPhotosIds.assignAll(selectedPhotosIds);
        SimilarPhotoController controller = Get.find<SimilarPhotoController>();
        controller.restoreSelections();
        break;
      case PhotosType.locationPhotos:
        ImagePickerUtil.selectedLocationPhotosIds.assignAll(selectedPhotosIds);
        break;
      case PhotosType.blurryPhotos:
        ImagePickerUtil.selectedBlurryPhotosIds.assignAll(selectedPhotosIds);
        ScreenShotsController controller = Get.find<ScreenShotsController>();
        controller.restoreSelections();
        break;
      }
  }
  void clickUnselect() {
    print("clickUnselect");
    cardSwiperController.value.swipe(CardSwiperDirection.right);
  }

  FutureOr<bool> onSwipe(
    int previousIndex,
    int? currentIndex,
    CardSwiperDirection direction,
  ) {
    print(
      'The card $previousIndex was swiped to the ${direction.name}. Now the card $currentIndex is on top',
    );
    if (currentIndex != null) {
      groupIndex.value = currentIndex;
    }
    // 如果direction是left，
    if (direction == CardSwiperDirection.left) {
      //   先看看图片id是不是在selectedPhotosIds里面，如果在，不处理，如果不在，添加到selectedPhotosIds里面
      if (!selectedPhotosIds.contains(photoGroups[previousIndex].id)) {
        print(
            'add photoGroups[groupIndex.value].id ${photoGroups[previousIndex].id}');
        selectedPhotosIds.add(photoGroups[previousIndex].id);
      }
    } else if (direction == CardSwiperDirection.right) {
      //   先看看图片id是不是在selectedPhotosIds里面，如果在，在selectedPhotosIds移除，不处理，如果不在，不处理
      if (selectedPhotosIds.contains(photoGroups[previousIndex].id)) {
        print(
            'remove photoGroups[groupIndex.value].id ${photoGroups[previousIndex].id}');
        selectedPhotosIds.remove(photoGroups[previousIndex].id);
      }
    }
    selectedFileCount.value = selectedPhotosIds.length;
    updateSelectedFilesSize();
    return true;
  }

  bool onSwiperUndo(
    int? previousIndex,
    int currentIndex,
    CardSwiperDirection direction,
  ) {
    print(
        'The card $currentIndex was swiped back to the ${direction.name}. Now the card $previousIndex is on top');

    groupIndex.value = currentIndex;
    //   撤销之前左滑的操作
    if (direction == CardSwiperDirection.left) {
      print(
          'photoGroups[groupIndex.value].id ${photoGroups[groupIndex.value].id}');
      if (selectedPhotosIds.contains(photoGroups[groupIndex.value].id)) {
        selectedPhotosIds.remove(photoGroups[groupIndex.value].id);
      }
    }
    selectedFileCount.value = selectedPhotosIds.length;
    updateSelectedFilesSize();
    return true;
  }
}