Data-Recover-Android/app/src/main/java/com/datarecovery/master/module/preview/PreviewViewModel.java

package com.datarecovery.master.module.preview;

import android.net.Uri;

import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;

import com.atmob.app.lib.base.BaseViewModel;
import com.atmob.common.runtime.ContextUtil;
import com.datarecovery.master.R;
import com.datarecovery.master.utils.BoxingUtil;
import com.datarecovery.master.utils.FileUtil;
import com.datarecovery.master.utils.ImageDeepDetector;
import com.datarecovery.master.utils.MediaStoreHelper;
import com.datarecovery.master.utils.ToastUtil;

import java.lang.ref.WeakReference;
import java.util.List;
import java.util.UUID;

import javax.inject.Inject;

import dagger.hilt.android.lifecycle.HiltViewModel;

@HiltViewModel
public class PreviewViewModel extends BaseViewModel {

    public static WeakReference<List<ImageDeepDetector.ImageFile>> weakReference;
    private final MutableLiveData<String> title = new MutableLiveData<>();
    private final MutableLiveData<Integer> type = new MutableLiveData<>();
    private final MutableLiveData<Uri> previewUri = new MutableLiveData<>();
    private final MutableLiveData<Boolean> isPlaying = new MutableLiveData<>();
    private List<ImageDeepDetector.ImageFile> imagePreviewList;

    private MutableLiveData<ImageDeepDetector.ImageFile> currentImageFile = new MutableLiveData<>();
    private int position;


    @Inject
    public PreviewViewModel() {

    }

    public LiveData<ImageDeepDetector.ImageFile> getCurrentImageFile() {
        return currentImageFile;
    }

    public int getPosition() {
        return position;
    }

    public List<ImageDeepDetector.ImageFile> getImagePreviewList() {
        return imagePreviewList;
    }

    public LiveData<String> getTitle() {
        return title;
    }

    public LiveData<Integer> getType() {
        return type;
    }

    public LiveData<Uri> getPreviewUri() {
        return previewUri;
    }

    public LiveData<Boolean> getIsPlaying() {
        return isPlaying;
    }

    public void setPreviewData(@PreviewActivity.Type int type, int position) {
        this.type.setValue(type);
        this.position = position;
        switch (type) {
            case PreviewActivity.TYPE_AUDIO:
                title.setValue(ContextUtil.getContext().getString(R.string.preview_audio));
                break;
            case PreviewActivity.TYPE_IMG:
                dealImageInit();
                break;
            case PreviewActivity.TYPE_VIDEO:
                title.setValue(ContextUtil.getContext().getString(R.string.preview_video));
                break;
        }
    }

    private void dealImageInit() {
        title.setValue(ContextUtil.getContext().getString(R.string.preview_img));
        if (weakReference != null) {
            this.imagePreviewList = weakReference.get();
        }
    }


    public void setUri(Uri uri) {
        this.previewUri.setValue(uri);
    }


    public void setPosition(int position) {
        int te = BoxingUtil.boxing(type.getValue());
        if (te == PreviewActivity.TYPE_IMG) {
            if (position != -1 && imagePreviewList != null && position < imagePreviewList.size()) {
                ImageDeepDetector.ImageFile imageFile = imagePreviewList.get(position);
                currentImageFile.setValue(imageFile);
            }

        }
    }

    public void onExportClick() {
        if (BoxingUtil.boxing(type.getValue()) == PreviewActivity.TYPE_IMG) {
            ImageDeepDetector.ImageFile value = currentImageFile.getValue();
            if (value == null) {
                return;
            }
            try {
                MediaStoreHelper.saveToSharedStorage(MediaStoreHelper.TYPE_IMAGE, value.newInputStream(), FileUtil.getCreateFileName(value.getName()));
                ToastUtil.show(R.string.export_success, ToastUtil.LENGTH_SHORT);
            } catch (Exception e) {
                ToastUtil.show(R.string.export_fail, ToastUtil.LENGTH_SHORT);
            }
        }
    }

    @Override
    protected void onCleared() {
        super.onCleared();
        if (weakReference != null) {
            weakReference.clear();
        }
    }
}