PiwigoDirectoryUploader/internal/pkg/images/synchronizePiwigo.go

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/*
* Copyright (C) 2019 Philipp Haefelfinger (http://www.haefelfinger.ch/). All Rights Reserved.
* This application is licensed under GPLv2. See the LICENSE file in the root directory of the project.
*/
package images
import (
"git.haefelfinger.net/piwigo/PiwigoDirectoryUploader/internal/pkg/datastore"
"git.haefelfinger.net/piwigo/PiwigoDirectoryUploader/internal/pkg/piwigo"
"github.com/sirupsen/logrus"
)
// This method aggregates the check for files with missing piwigoids and if changed files need to be uploaded again.
func SynchronizePiwigoMetadata(piwigoCtx piwigo.ImageApi, metadataProvider datastore.ImageMetadataProvider) error {
logrus.Debug("Entering SynchronizePiwigoMetadata")
defer logrus.Debug("Leaving SynchronizePiwigoMetadata")
// TODO: check if category has to be assigned (image possibly added to two albums -> only uploaded once but assigned multiple times) -> implement later
err := updatePiwigoIdIfAlreadyUploaded(metadataProvider, piwigoCtx)
if err != nil {
return err
}
err = checkPiwigoForChangedImages(metadataProvider, piwigoCtx)
if err != nil {
return err
}
return nil
}
// This function calls piwigo and checks if the given md5sum is already present.
// Only files without a piwigo id are used to query the server.
func updatePiwigoIdIfAlreadyUploaded(provider datastore.ImageMetadataProvider, piwigoCtx piwigo.ImageApi) error {
logrus.Info("checking for pending files that are already on piwigo and updating piwigoids...")
defer logrus.Info("finshed checking for pending files that are already on piwigo and updating piwigoids...")
images, err := provider.ImageMetadataToUpload()
if err != nil {
return err
}
if len(images) == 0 {
logrus.Info("There are no existing images to check for modification on the server.")
return nil
}
logrus.Debugln("Preparing lookuplist for missing piwigo ids...")
files := make([]string, 0, len(images))
for _, img := range images {
if img.PiwigoId == 0 {
files = append(files, img.Md5Sum)
}
}
if len(files) == 0 {
logrus.Info("There are no images without piwigo id to check for modification on the server.")
return nil
}
missingResults, err := piwigoCtx.ImagesExistOnPiwigo(files)
if err != nil {
return err
}
for md5sum, piwigoId := range missingResults {
if piwigoId > 0 {
logrus.Debugf("Setting piwigo id of %s to %d", md5sum, piwigoId)
err = provider.SavePiwigoIdAndUpdateUploadFlag(md5sum, piwigoId)
if err != nil {
logrus.Warnf("Could not save piwigo id %d for file %s", piwigoId, md5sum)
}
} else {
logrus.Tracef("Image %s not found on server", md5sum)
}
}
return nil
}
// Check all images with upload required if they are really changed and need to be uploaded to the server.
func checkPiwigoForChangedImages(provider datastore.ImageMetadataProvider, piwigoCtx piwigo.ImageApi) error {
logrus.Info("Checking pending files if they really differ from the version in piwigo...")
defer logrus.Info("Finished checking pending files if they really differ from the version in piwigo...")
images, err := provider.ImageMetadataToUpload()
if err != nil {
return err
}
if len(images) == 0 {
logrus.Info("There are no existing images to check for modification on the server.")
return nil
}
for _, img := range images {
if img.PiwigoId == 0 {
continue
}
2019-04-09 00:16:31 +02:00
var state int
state, err = piwigoCtx.ImageCheckFile(img.PiwigoId, img.Md5Sum)
if err != nil {
logrus.Warnf("Error during file change check of file %s", img.FullImagePath)
continue
}
if state == piwigo.ImageStateUptodate {
logrus.Debugf("File %s - %d has not changed", img.FullImagePath, img.PiwigoId)
img.UploadRequired = false
err = provider.SaveImageMetadata(img)
if err != nil {
logrus.Warnf("Could not save image data of image %s", img.FullImagePath)
}
}
}
return nil
}