mirror of
https://github.com/commons-app/apps-android-commons.git
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Convert ImageProcessingService to kotlin
This commit is contained in:
Paul Hawke
parent
e68341efb2
commit
85c6cda3d8
2 changed files with 183 additions and 190 deletions
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@ -1,190 +0,0 @@
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package fr.free.nrw.commons.upload;
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import static fr.free.nrw.commons.utils.ImageUtils.EMPTY_CAPTION;
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import static fr.free.nrw.commons.utils.ImageUtils.FILE_NAME_EXISTS;
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import static fr.free.nrw.commons.utils.ImageUtils.IMAGE_DUPLICATE;
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import static fr.free.nrw.commons.utils.ImageUtils.IMAGE_KEEP;
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import static fr.free.nrw.commons.utils.ImageUtils.IMAGE_OK;
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import android.content.Context;
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import fr.free.nrw.commons.location.LatLng;
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import fr.free.nrw.commons.media.MediaClient;
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import fr.free.nrw.commons.nearby.Place;
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import fr.free.nrw.commons.utils.ImageUtilsWrapper;
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import io.reactivex.Single;
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import io.reactivex.schedulers.Schedulers;
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import java.util.List;
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import javax.inject.Inject;
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import javax.inject.Singleton;
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import org.apache.commons.lang3.StringUtils;
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import timber.log.Timber;
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/**
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* Methods for pre-processing images to be uploaded
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*/
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@Singleton
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public class ImageProcessingService {
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private final FileUtilsWrapper fileUtilsWrapper;
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private final ImageUtilsWrapper imageUtilsWrapper;
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private final ReadFBMD readFBMD;
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private final EXIFReader EXIFReader;
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private final MediaClient mediaClient;
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@Inject
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public ImageProcessingService(FileUtilsWrapper fileUtilsWrapper,
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ImageUtilsWrapper imageUtilsWrapper,
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ReadFBMD readFBMD, EXIFReader EXIFReader,
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MediaClient mediaClient, Context context) {
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this.fileUtilsWrapper = fileUtilsWrapper;
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this.imageUtilsWrapper = imageUtilsWrapper;
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this.readFBMD = readFBMD;
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this.EXIFReader = EXIFReader;
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this.mediaClient = mediaClient;
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}
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/**
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* Check image quality before upload - checks duplicate image - checks dark image - checks
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* geolocation for image
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*
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* @param uploadItem UploadItem whose quality is to be checked
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* @param inAppPictureLocation In app picture location (if any)
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* @return Quality of UploadItem
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*/
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Single<Integer> validateImage(UploadItem uploadItem, LatLng inAppPictureLocation) {
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int currentImageQuality = uploadItem.getImageQuality();
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Timber.d("Current image quality is %d", currentImageQuality);
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if (currentImageQuality == IMAGE_KEEP || currentImageQuality == IMAGE_OK) {
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return Single.just(IMAGE_OK);
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}
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Timber.d("Checking the validity of image");
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String filePath = uploadItem.getMediaUri().getPath();
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return Single.zip(
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checkDuplicateImage(filePath),
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checkImageGeoLocation(uploadItem.getPlace(), filePath, inAppPictureLocation),
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checkDarkImage(filePath),
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checkFBMD(filePath),
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checkEXIF(filePath),
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(duplicateImage, wrongGeoLocation, darkImage, fbmd, exif) -> {
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Timber.d("duplicate: %d, geo: %d, dark: %d" + "fbmd:" + fbmd + "exif:"
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+ exif,
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duplicateImage, wrongGeoLocation, darkImage);
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return duplicateImage | wrongGeoLocation | darkImage | fbmd | exif;
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}
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);
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}
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/**
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* Checks caption of the given UploadItem
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*
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* @param uploadItem UploadItem whose caption is to be verified
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* @return Quality of caption of the UploadItem
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*/
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Single<Integer> validateCaption(UploadItem uploadItem) {
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int currentImageQuality = uploadItem.getImageQuality();
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Timber.d("Current image quality is %d", currentImageQuality);
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if (currentImageQuality == IMAGE_KEEP) {
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return Single.just(IMAGE_OK);
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}
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Timber.d("Checking the validity of caption");
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return validateItemTitle(uploadItem);
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}
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/**
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* We want to discourage users from uploading images to Commons that were taken from Facebook.
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* This attempts to detect whether an image was downloaded from Facebook by heuristically
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* searching for metadata that is specific to images that come from Facebook.
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*/
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private Single<Integer> checkFBMD(String filepath) {
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return readFBMD.processMetadata(filepath);
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}
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/**
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* We try to minimize uploads from the Commons app that might be copyright violations. If an
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* image does not have any Exif metadata, then it was likely downloaded from the internet, and
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* is probably not an original work by the user. We detect these kinds of images by looking for
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* the presence of some basic Exif metadata.
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*/
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private Single<Integer> checkEXIF(String filepath) {
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return EXIFReader.processMetadata(filepath);
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}
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/**
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* Checks item caption - empty caption - existing caption
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*
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* @param uploadItem
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* @return
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*/
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private Single<Integer> validateItemTitle(UploadItem uploadItem) {
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Timber.d("Checking for image title %s", uploadItem.getUploadMediaDetails());
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List<UploadMediaDetail> captions = uploadItem.getUploadMediaDetails();
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if (captions.isEmpty()) {
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return Single.just(EMPTY_CAPTION);
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}
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return mediaClient.checkPageExistsUsingTitle("File:" + uploadItem.getFileName())
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.map(doesFileExist -> {
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Timber.d("Result for valid title is %s", doesFileExist);
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return doesFileExist ? FILE_NAME_EXISTS : IMAGE_OK;
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})
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.subscribeOn(Schedulers.io());
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}
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/**
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* Checks for duplicate image
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*
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* @param filePath file to be checked
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* @return IMAGE_DUPLICATE or IMAGE_OK
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*/
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Single<Integer> checkDuplicateImage(String filePath) {
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Timber.d("Checking for duplicate image %s", filePath);
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return Single.fromCallable(() -> fileUtilsWrapper.getFileInputStream(filePath))
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.map(fileUtilsWrapper::getSHA1)
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.flatMap(mediaClient::checkFileExistsUsingSha)
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.map(b -> {
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Timber.d("Result for duplicate image %s", b);
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return b ? IMAGE_DUPLICATE : IMAGE_OK;
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})
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.subscribeOn(Schedulers.io());
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}
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/**
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* Checks for dark image
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*
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* @param filePath file to be checked
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* @return IMAGE_DARK or IMAGE_OK
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*/
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private Single<Integer> checkDarkImage(String filePath) {
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Timber.d("Checking for dark image %s", filePath);
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return imageUtilsWrapper.checkIfImageIsTooDark(filePath);
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}
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/**
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* Checks for image geolocation returns IMAGE_OK if the place is null or if the file doesn't
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* contain a geolocation
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*
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* @param filePath file to be checked
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* @return IMAGE_GEOLOCATION_DIFFERENT or IMAGE_OK
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*/
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private Single<Integer> checkImageGeoLocation(Place place, String filePath, LatLng inAppPictureLocation) {
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Timber.d("Checking for image geolocation %s", filePath);
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if (place == null || StringUtils.isBlank(place.getWikiDataEntityId())) {
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return Single.just(IMAGE_OK);
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}
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return Single.fromCallable(() -> filePath)
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.flatMap(path -> Single.just(fileUtilsWrapper.getGeolocationOfFile(path, inAppPictureLocation)))
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.flatMap(geoLocation -> {
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if (StringUtils.isBlank(geoLocation)) {
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return Single.just(IMAGE_OK);
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}
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return imageUtilsWrapper
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.checkImageGeolocationIsDifferent(geoLocation, place.getLocation());
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})
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.subscribeOn(Schedulers.io());
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}
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}
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@ -0,0 +1,183 @@
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package fr.free.nrw.commons.upload
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import fr.free.nrw.commons.location.LatLng
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import fr.free.nrw.commons.media.MediaClient
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import fr.free.nrw.commons.nearby.Place
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import fr.free.nrw.commons.utils.ImageUtils.EMPTY_CAPTION
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import fr.free.nrw.commons.utils.ImageUtils.FILE_NAME_EXISTS
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import fr.free.nrw.commons.utils.ImageUtils.IMAGE_DUPLICATE
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import fr.free.nrw.commons.utils.ImageUtils.IMAGE_KEEP
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import fr.free.nrw.commons.utils.ImageUtils.IMAGE_OK
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import fr.free.nrw.commons.utils.ImageUtilsWrapper
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import io.reactivex.Single
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import io.reactivex.functions.Function
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import io.reactivex.schedulers.Schedulers
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import org.apache.commons.lang3.StringUtils
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import timber.log.Timber
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import java.io.FileInputStream
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import javax.inject.Inject
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import javax.inject.Singleton
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/**
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* Methods for pre-processing images to be uploaded
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*/
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@Singleton
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class ImageProcessingService @Inject constructor(
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private val fileUtilsWrapper: FileUtilsWrapper,
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private val imageUtilsWrapper: ImageUtilsWrapper,
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private val readFBMD: ReadFBMD,
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private val EXIFReader: EXIFReader,
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private val mediaClient: MediaClient
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) {
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/**
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* Check image quality before upload - checks duplicate image - checks dark image - checks
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* geolocation for image
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*
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* @param uploadItem UploadItem whose quality is to be checked
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* @param inAppPictureLocation In app picture location (if any)
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* @return Quality of UploadItem
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*/
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fun validateImage(uploadItem: UploadItem, inAppPictureLocation: LatLng?): Single<Int> {
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val currentImageQuality = uploadItem.imageQuality
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Timber.d("Current image quality is %d", currentImageQuality)
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if (currentImageQuality == IMAGE_KEEP || currentImageQuality == IMAGE_OK) {
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return Single.just(IMAGE_OK)
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}
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Timber.d("Checking the validity of image")
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val filePath = uploadItem.mediaUri.path
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return Single.zip(
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checkDuplicateImage(filePath),
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checkImageGeoLocation(uploadItem.place, filePath, inAppPictureLocation),
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checkDarkImage(filePath!!),
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checkFBMD(filePath),
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checkEXIF(filePath)
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) { duplicateImage: Int, wrongGeoLocation: Int, darkImage: Int, fbmd: Int, exif: Int ->
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Timber.d(
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"duplicate: %d, geo: %d, dark: %d, fbmd: %d, exif: %d",
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duplicateImage, wrongGeoLocation, darkImage, fbmd, exif
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)
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return@zip duplicateImage or wrongGeoLocation or darkImage or fbmd or exif
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}
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}
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/**
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* Checks caption of the given UploadItem
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*
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* @param uploadItem UploadItem whose caption is to be verified
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* @return Quality of caption of the UploadItem
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*/
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fun validateCaption(uploadItem: UploadItem): Single<Int> {
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val currentImageQuality = uploadItem.imageQuality
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Timber.d("Current image quality is %d", currentImageQuality)
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if (currentImageQuality == IMAGE_KEEP) {
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return Single.just(IMAGE_OK)
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}
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Timber.d("Checking the validity of caption")
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return validateItemTitle(uploadItem)
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}
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/**
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* We want to discourage users from uploading images to Commons that were taken from Facebook.
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* This attempts to detect whether an image was downloaded from Facebook by heuristically
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* searching for metadata that is specific to images that come from Facebook.
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*/
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private fun checkFBMD(filepath: String?): Single<Int> =
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readFBMD.processMetadata(filepath)
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/**
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* We try to minimize uploads from the Commons app that might be copyright violations. If an
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* image does not have any Exif metadata, then it was likely downloaded from the internet, and
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* is probably not an original work by the user. We detect these kinds of images by looking for
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* the presence of some basic Exif metadata.
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*/
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private fun checkEXIF(filepath: String): Single<Int> =
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EXIFReader.processMetadata(filepath)
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/**
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* Checks item caption - empty caption - existing caption
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*/
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private fun validateItemTitle(uploadItem: UploadItem): Single<Int> {
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Timber.d("Checking for image title %s", uploadItem.uploadMediaDetails)
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val captions = uploadItem.uploadMediaDetails
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if (captions.isEmpty()) {
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return Single.just(EMPTY_CAPTION)
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}
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return mediaClient.checkPageExistsUsingTitle("File:" + uploadItem.fileName)
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.map { doesFileExist: Boolean ->
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Timber.d("Result for valid title is %s", doesFileExist)
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if (doesFileExist) FILE_NAME_EXISTS else IMAGE_OK
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}
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.subscribeOn(Schedulers.io())
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}
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/**
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* Checks for duplicate image
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*
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* @param filePath file to be checked
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* @return IMAGE_DUPLICATE or IMAGE_OK
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*/
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fun checkDuplicateImage(filePath: String?): Single<Int> {
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Timber.d("Checking for duplicate image %s", filePath)
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return Single.fromCallable { fileUtilsWrapper.getFileInputStream(filePath) }
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.map { stream: FileInputStream? ->
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fileUtilsWrapper.getSHA1(stream)
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}
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.flatMap { fileSha: String? ->
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mediaClient.checkFileExistsUsingSha(fileSha)
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}
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.map {
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Timber.d("Result for duplicate image %s", it)
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if (it) IMAGE_DUPLICATE else IMAGE_OK
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}
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.subscribeOn(Schedulers.io())
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}
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/**
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* Checks for dark image
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*
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* @param filePath file to be checked
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* @return IMAGE_DARK or IMAGE_OK
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*/
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private fun checkDarkImage(filePath: String): Single<Int> {
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Timber.d("Checking for dark image %s", filePath)
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return imageUtilsWrapper.checkIfImageIsTooDark(filePath)
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}
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/**
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* Checks for image geolocation returns IMAGE_OK if the place is null or if the file doesn't
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* contain a geolocation
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*
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* @param filePath file to be checked
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* @return IMAGE_GEOLOCATION_DIFFERENT or IMAGE_OK
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*/
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private fun checkImageGeoLocation(
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place: Place?,
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filePath: String?,
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inAppPictureLocation: LatLng?
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): Single<Int> {
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Timber.d("Checking for image geolocation %s", filePath)
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if (place == null || StringUtils.isBlank(place.wikiDataEntityId)) {
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return Single.just(IMAGE_OK)
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}
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return Single.fromCallable<String?> { filePath }
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.flatMap { path: String? ->
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Single.just<String?>(
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fileUtilsWrapper.getGeolocationOfFile(path!!, inAppPictureLocation)
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)
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}
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.flatMap { geoLocation: String? ->
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if (geoLocation.isNullOrBlank()) {
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return@flatMap Single.just<Int>(IMAGE_OK)
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}
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imageUtilsWrapper.checkImageGeolocationIsDifferent(geoLocation, place.getLocation())
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}
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.subscribeOn(Schedulers.io())
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}
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}
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