Backend: Add groom worker and test stubs #154

Signed-off-by: Michael Mayer <michael@liquidbytes.net>

internal/api/photo.go

@@ -193,7 +193,7 @@ func LikePhoto(router *gin.RouterGroup, conf *config.Config) {
 			return
 		}
 
-		if err := m.SetFavorite(true); err != nil{
+		if err := m.SetFavorite(true); err != nil {
 			log.Errorf("photo: %s", err.Error())
 			c.AbortWithStatusJSON(http.StatusInternalServerError, ErrSaveFailed)
 			return
@@ -226,7 +226,7 @@ func DislikePhoto(router *gin.RouterGroup, conf *config.Config) {
 			return
 		}
 
-		if err := m.SetFavorite(false); err != nil{
+		if err := m.SetFavorite(false); err != nil {
 			log.Errorf("photo: %s", err.Error())
 			c.AbortWithStatusJSON(http.StatusInternalServerError, ErrSaveFailed)
 			return

internal/config/config.go

@@ -201,9 +201,10 @@ func (c *Config) Cache() *gc.Cache {
 
 // Shutdown services and workers.
 func (c *Config) Shutdown() {
-	mutex.Worker.Cancel()
-	mutex.Share.Cancel()
-	mutex.Sync.Cancel()
+	mutex.MainWorker.Cancel()
+	mutex.ShareWorker.Cancel()
+	mutex.SyncWorker.Cancel()
+	mutex.GroomWorker.Cancel()
 
 	if err := c.CloseDb(); err != nil {
 		log.Errorf("could not close database connection: %s", err)

internal/mutex/mutex.go

@@ -5,8 +5,14 @@ import (
 )
 
 var (
-	Db     = sync.Mutex{}
-	Worker = Busy{}
-	Sync   = Busy{}
-	Share  = Busy{}
+	Db          = sync.Mutex{}
+	MainWorker  = Busy{}
+	SyncWorker  = Busy{}
+	ShareWorker = Busy{}
+	GroomWorker = Busy{}
 )
+
+// WorkersBusy returns true if any worker is busy.
+func WorkersBusy() bool {
+	return MainWorker.Busy() || SyncWorker.Busy() || ShareWorker.Busy() || GroomWorker.Busy()
+}

internal/photoprism/convert.go

@@ -32,11 +32,11 @@ func NewConvert(conf *config.Config) *Convert {
 
 // Start converts all files in a directory to JPEG if possible.
 func (c *Convert) Start(path string) error {
-	if err := mutex.Worker.Start(); err != nil {
+	if err := mutex.MainWorker.Start(); err != nil {
 		return err
 	}
 
-	defer mutex.Worker.Stop()
+	defer mutex.MainWorker.Stop()
 
 	jobs := make(chan ConvertJob)
 
@@ -70,7 +70,7 @@ func (c *Convert) Start(path string) error {
 				}
 			}()
 
-			if mutex.Worker.Canceled() {
+			if mutex.MainWorker.Canceled() {
 				return errors.New("convert: canceled")
 			}
 

internal/photoprism/import.go

@@ -58,12 +58,12 @@ func (imp *Import) Start(opt ImportOptions) map[string]bool {
 		return done
 	}
 
-	if err := mutex.Worker.Start(); err != nil {
+	if err := mutex.MainWorker.Start(); err != nil {
 		event.Error(fmt.Sprintf("import: %s", err.Error()))
 		return done
 	}
 
-	defer mutex.Worker.Stop()
+	defer mutex.MainWorker.Stop()
 
 	if err := ind.tensorFlow.Init(); err != nil {
 		log.Errorf("import: %s", err.Error())
@@ -102,7 +102,7 @@ func (imp *Import) Start(opt ImportOptions) map[string]bool {
 				}
 			}()
 
-			if mutex.Worker.Canceled() {
+			if mutex.MainWorker.Canceled() {
 				return errors.New("import canceled")
 			}
 
@@ -220,7 +220,7 @@ func (imp *Import) Start(opt ImportOptions) map[string]bool {
 
 // Cancel stops the current import operation.
 func (imp *Import) Cancel() {
-	mutex.Worker.Cancel()
+	mutex.MainWorker.Cancel()
 }
 
 // DestinationFilename returns the destination filename of a MediaFile to be imported.

internal/photoprism/index.go

@@ -54,7 +54,7 @@ func (ind *Index) thumbPath() string {
 
 // Cancel stops the current indexing operation.
 func (ind *Index) Cancel() {
-	mutex.Worker.Cancel()
+	mutex.MainWorker.Cancel()
 }
 
 // Start indexes media files in the originals directory.
@@ -68,12 +68,12 @@ func (ind *Index) Start(opt IndexOptions) map[string]bool {
 		return done
 	}
 
-	if err := mutex.Worker.Start(); err != nil {
+	if err := mutex.MainWorker.Start(); err != nil {
 		event.Error(fmt.Sprintf("index: %s", err.Error()))
 		return done
 	}
 
-	defer mutex.Worker.Stop()
+	defer mutex.MainWorker.Stop()
 
 	if err := ind.tensorFlow.Init(); err != nil {
 		log.Errorf("index: %s", err.Error())
@@ -112,7 +112,7 @@ func (ind *Index) Start(opt IndexOptions) map[string]bool {
 				}
 			}()
 
-			if mutex.Worker.Canceled() {
+			if mutex.MainWorker.Canceled() {
 				return errors.New("indexing canceled")
 			}
 

internal/photoprism/purge.go

@@ -55,14 +55,14 @@ func (prg *Purge) Start(opt PurgeOptions) (purgedFiles map[string]bool, purgedPh
 	purgedPhotos = make(map[string]bool)
 	originalsPath := prg.originalsPath()
 
-	if err := mutex.Worker.Start(); err != nil {
+	if err := mutex.MainWorker.Start(); err != nil {
 		err = fmt.Errorf("purge: %s", err.Error())
 		event.Error(err.Error())
 		return purgedFiles, purgedPhotos, err
 	}
 
 	defer func() {
-		mutex.Worker.Stop()
+		mutex.MainWorker.Stop()
 		runtime.GC()
 	}()
 
@@ -81,7 +81,7 @@ func (prg *Purge) Start(opt PurgeOptions) (purgedFiles map[string]bool, purgedPh
 		}
 
 		for _, file := range files {
-			if mutex.Worker.Canceled() {
+			if mutex.MainWorker.Canceled() {
 				return purgedFiles, purgedPhotos, errors.New("purge canceled")
 			}
 
@@ -107,7 +107,7 @@ func (prg *Purge) Start(opt PurgeOptions) (purgedFiles map[string]bool, purgedPh
 			}
 		}
 
-		if mutex.Worker.Canceled() {
+		if mutex.MainWorker.Canceled() {
 			return purgedFiles, purgedPhotos, errors.New("purge canceled")
 		}
 
@@ -131,7 +131,7 @@ func (prg *Purge) Start(opt PurgeOptions) (purgedFiles map[string]bool, purgedPh
 		}
 
 		for _, photo := range photos {
-			if mutex.Worker.Canceled() {
+			if mutex.MainWorker.Canceled() {
 				return purgedFiles, purgedPhotos, errors.New("purge canceled")
 			}
 
@@ -158,7 +158,7 @@ func (prg *Purge) Start(opt PurgeOptions) (purgedFiles map[string]bool, purgedPh
 			}
 		}
 
-		if mutex.Worker.Canceled() {
+		if mutex.MainWorker.Canceled() {
 			return purgedFiles, purgedPhotos, errors.New("purge canceled")
 		}
 
@@ -182,5 +182,5 @@ func (prg *Purge) Start(opt PurgeOptions) (purgedFiles map[string]bool, purgedPh
 
 // Cancel stops the current purge operation.
 func (prg *Purge) Cancel() {
-	mutex.Worker.Cancel()
+	mutex.MainWorker.Cancel()
 }

internal/photoprism/resample.go

@@ -24,11 +24,11 @@ func NewResample(conf *config.Config) *Resample {
 
 // Start creates default thumbnails for all files in originalsPath.
 func (rs *Resample) Start(force bool) error {
-	if err := mutex.Worker.Start(); err != nil {
+	if err := mutex.MainWorker.Start(); err != nil {
 		return err
 	}
 
-	defer mutex.Worker.Stop()
+	defer mutex.MainWorker.Stop()
 
 	originalsPath := rs.conf.OriginalsPath()
 	thumbnailsPath := rs.conf.ThumbPath()
@@ -65,7 +65,7 @@ func (rs *Resample) Start(force bool) error {
 				}
 			}()
 
-			if mutex.Worker.Canceled() {
+			if mutex.MainWorker.Canceled() {
 				return errors.New("resample: canceled")
 			}
 

internal/video/video.go

@@ -1,5 +1,5 @@
 /*
-This package encapsulates JPEG thumbnail generation.
+This package contains video related types and functions.
 
 Additional information can be found in our Developer Guide:
 
@@ -8,12 +8,9 @@ https://github.com/photoprism/photoprism/wiki
 package video
 
 import (
-	"github.com/photoprism/photoprism/internal/event"
 	"github.com/photoprism/photoprism/pkg/fs"
 )
 
-var log = event.Log
-
 type Type struct {
 	Format fs.FileType
 	Width  int

internal/video/video_test.go

@@ -0,0 +1,13 @@
+package video
+
+import "testing"
+
+func TestTypes(t *testing.T) {
+	if val := Types[""]; val != TypeMP4 {
+		t.Fatal("default type should be TypeMP4")
+	}
+
+	if val := Types["mp4"]; val != TypeMP4 {
+		t.Fatal("mp4 type should be TypeMP4")
+	}
+}

internal/workers/groom.go

@@ -0,0 +1,42 @@
+package workers
+
+import (
+	"github.com/photoprism/photoprism/internal/config"
+	"github.com/photoprism/photoprism/internal/mutex"
+)
+
+// Groom represents a groom worker.
+type Groom struct {
+	conf *config.Config
+}
+
+// NewGroom returns a new groom worker.
+func NewGroom(conf *config.Config) *Groom {
+	return &Groom{conf: conf}
+}
+
+// logError logs an error message if err is not nil.
+func (worker *Groom) logError(err error) {
+	if err != nil {
+		log.Errorf("groom: %s", err.Error())
+	}
+}
+
+// logWarn logs a warning message if err is not nil.
+func (worker *Groom) logWarn(err error) {
+	if err != nil {
+		log.Warnf("groom: %s", err.Error())
+	}
+}
+
+// Start starts the groom worker.
+func (worker *Groom) Start() (err error) {
+	if err := mutex.GroomWorker.Start(); err != nil {
+		worker.logWarn(err)
+		return err
+	}
+
+	defer mutex.GroomWorker.Stop()
+
+	return err
+}

internal/workers/groom_test.go

@@ -0,0 +1,31 @@
+package workers
+
+import (
+	"testing"
+
+	"github.com/photoprism/photoprism/internal/config"
+	"github.com/photoprism/photoprism/internal/mutex"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGroom_Start(t *testing.T) {
+	conf := config.TestConfig()
+
+	worker := NewGroom(conf)
+
+	assert.IsType(t, &Groom{}, worker)
+
+	if err := mutex.GroomWorker.Start(); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := worker.Start(); err == nil {
+		t.Fatal("error expected")
+	}
+
+	mutex.GroomWorker.Stop()
+
+	if err := worker.Start(); err != nil {
+		t.Fatal(err)
+	}
+}

internal/workers/share.go

@@ -21,19 +21,26 @@ type Share struct {
 	conf *config.Config
 }
 
-// NewShare returns a new service share worker.
+// NewShare returns a new share worker.
 func NewShare(conf *config.Config) *Share {
 	return &Share{conf: conf}
 }
 
+// logError logs an error message if err is not nil.
+func (worker *Share) logError(err error) {
+	if err != nil {
+		log.Errorf("share: %s", err.Error())
+	}
+}
+
 // Start starts the share worker.
-func (s *Share) Start() (err error) {
-	if err := mutex.Share.Start(); err != nil {
+func (worker *Share) Start() (err error) {
+	if err := mutex.ShareWorker.Start(); err != nil {
 		event.Error(fmt.Sprintf("share: %s", err.Error()))
 		return err
 	}
 
-	defer mutex.Share.Stop()
+	defer mutex.ShareWorker.Stop()
 
 	f := form.AccountSearch{
 		Share: true,
@@ -44,7 +51,7 @@ func (s *Share) Start() (err error) {
 
 	// Upload newly shared files
 	for _, a := range accounts {
-		if mutex.Share.Canceled() {
+		if mutex.ShareWorker.Canceled() {
 			return nil
 		}
 
@@ -55,7 +62,7 @@ func (s *Share) Start() (err error) {
 		files, err := query.FileShares(a.ID, entity.FileShareNew)
 
 		if err != nil {
-			log.Errorf("share: %s", err.Error())
+			worker.logError(err)
 			continue
 		}
 
@@ -68,7 +75,7 @@ func (s *Share) Start() (err error) {
 		existingDirs := make(map[string]string)
 
 		for _, file := range files {
-			if mutex.Share.Canceled() {
+			if mutex.ShareWorker.Canceled() {
 				return nil
 			}
 
@@ -81,7 +88,7 @@ func (s *Share) Start() (err error) {
 				}
 			}
 
-			srcFileName := path.Join(s.conf.OriginalsPath(), file.File.FileName)
+			srcFileName := path.Join(worker.conf.OriginalsPath(), file.File.FileName)
 
 			if a.ShareSize != "" {
 				thumbType, ok := thumb.Types[a.ShareSize]
@@ -91,16 +98,16 @@ func (s *Share) Start() (err error) {
 					continue
 				}
 
-				srcFileName, err = thumb.FromFile(srcFileName, file.File.FileHash, s.conf.ThumbPath(), thumbType.Width, thumbType.Height, thumbType.Options...)
+				srcFileName, err = thumb.FromFile(srcFileName, file.File.FileHash, worker.conf.ThumbPath(), thumbType.Width, thumbType.Height, thumbType.Options...)
 
 				if err != nil {
-					log.Errorf("share: %s", err)
+					worker.logError(err)
 					continue
 				}
 			}
 
 			if err := client.Upload(srcFileName, file.RemoteName); err != nil {
-				log.Errorf("share: %s", err.Error())
+				worker.logError(err)
 				file.Errors++
 				file.Error = err.Error()
 			} else {
@@ -114,19 +121,17 @@ func (s *Share) Start() (err error) {
 				file.Status = entity.FileShareError
 			}
 
-			if mutex.Share.Canceled() {
+			if mutex.ShareWorker.Canceled() {
 				return nil
 			}
 
-			if err := entity.Db().Save(&file).Error; err != nil {
-				log.Errorf("share: %s", err.Error())
-			}
+			worker.logError(entity.Db().Save(&file).Error)
 		}
 	}
 
 	// Remove previously shared files if expired
 	for _, a := range accounts {
-		if mutex.Share.Canceled() {
+		if mutex.ShareWorker.Canceled() {
 			return nil
 		}
 
@@ -137,7 +142,7 @@ func (s *Share) Start() (err error) {
 		files, err := query.ExpiredFileShares(a)
 
 		if err != nil {
-			log.Errorf("share: %s", err.Error())
+			worker.logError(err)
 			continue
 		}
 
@@ -149,7 +154,7 @@ func (s *Share) Start() (err error) {
 		client := webdav.New(a.AccURL, a.AccUser, a.AccPass)
 
 		for _, file := range files {
-			if mutex.Share.Canceled() {
+			if mutex.ShareWorker.Canceled() {
 				return nil
 			}
 
@@ -164,7 +169,7 @@ func (s *Share) Start() (err error) {
 			}
 
 			if err := entity.Db().Save(&file).Error; err != nil {
-				log.Errorf("share: %s", err.Error())
+				worker.logError(err)
 			}
 		}
 	}

internal/workers/share_test.go

@@ -0,0 +1,16 @@
+package workers
+
+import (
+	"testing"
+
+	"github.com/photoprism/photoprism/internal/config"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewShare(t *testing.T) {
+	conf := config.TestConfig()
+
+	worker := NewShare(conf)
+
+	assert.IsType(t, &Share{}, worker)
+}

internal/workers/sync.go

@@ -18,28 +18,35 @@ type Sync struct {
 	conf *config.Config
 }
 
-// NewSync returns a new service sync worker.
+// NewSync returns a new sync worker.
 func NewSync(conf *config.Config) *Sync {
 	return &Sync{
 		conf: conf,
 	}
 }
 
-// Report logs an error message if err is not nil.
-func (s *Sync) report(err error) {
+// logError logs an error message if err is not nil.
+func (worker *Sync) logError(err error) {
 	if err != nil {
 		log.Errorf("sync: %s", err.Error())
 	}
 }
 
+// logWarn logs a warning message if err is not nil.
+func (worker *Sync) logWarn(err error) {
+	if err != nil {
+		log.Warnf("sync: %s", err.Error())
+	}
+}
+
 // Start starts the sync worker.
-func (s *Sync) Start() (err error) {
-	if err := mutex.Sync.Start(); err != nil {
+func (worker *Sync) Start() (err error) {
+	if err := mutex.SyncWorker.Start(); err != nil {
 		event.Error(fmt.Sprintf("sync: %s", err.Error()))
 		return err
 	}
 
-	defer mutex.Sync.Stop()
+	defer mutex.SyncWorker.Stop()
 
 	f := form.AccountSearch{
 		Sync: true,
@@ -57,7 +64,7 @@ func (s *Sync) Start() (err error) {
 			a.AccSync = false
 
 			if err := entity.Db().Save(&a).Error; err != nil {
-				log.Errorf("sync: %s", err.Error())
+				worker.logError(err)
 			} else {
 				log.Warnf("sync: disabled sync, %s failed more than %d times", a.AccName, a.RetryLimit)
 			}
@@ -74,7 +81,7 @@ func (s *Sync) Start() (err error) {
 
 		switch a.SyncStatus {
 		case entity.AccountSyncStatusRefresh:
-			if complete, err := s.refresh(a); err != nil {
+			if complete, err := worker.refresh(a); err != nil {
 				accErrors++
 				accError = err.Error()
 			} else if complete {
@@ -92,7 +99,7 @@ func (s *Sync) Start() (err error) {
 				}
 			}
 		case entity.AccountSyncStatusDownload:
-			if complete, err := s.download(a); err != nil {
+			if complete, err := worker.download(a); err != nil {
 				accErrors++
 				accError = err.Error()
 			} else if complete {
@@ -106,7 +113,7 @@ func (s *Sync) Start() (err error) {
 				}
 			}
 		case entity.AccountSyncStatusUpload:
-			if complete, err := s.upload(a); err != nil {
+			if complete, err := worker.upload(a); err != nil {
 				accErrors++
 				accError = err.Error()
 			} else if complete {
@@ -123,17 +130,17 @@ func (s *Sync) Start() (err error) {
 			syncStatus = entity.AccountSyncStatusRefresh
 		}
 
-		if mutex.Sync.Canceled() {
+		if mutex.SyncWorker.Canceled() {
 			return nil
 		}
 
 		// Only update the following fields to avoid overwriting other settings
 		if err := a.Updates(map[string]interface{}{
-			"AccError": accError,
-			"AccErrors": accErrors,
+			"AccError":   accError,
+			"AccErrors":  accErrors,
 			"SyncStatus": syncStatus,
-			"SyncDate": syncDate}); err != nil {
-			log.Errorf("sync: %s", err.Error())
+			"SyncDate":   syncDate}); err != nil {
+			worker.logError(err)
 		} else if synced {
 			event.Publish("sync.synced", event.Data{"account": a})
 		}

internal/workers/sync_download.go

@@ -17,12 +17,12 @@ import (
 type Downloads map[string][]entity.FileSync
 
 // downloadPath returns a temporary download path.
-func (s *Sync) downloadPath() string {
-	return s.conf.TempPath() + "/sync"
+func (worker *Sync) downloadPath() string {
+	return worker.conf.TempPath() + "/sync"
 }
 
 // relatedDownloads returns files to be downloaded grouped by prefix.
-func (s *Sync) relatedDownloads(a entity.Account) (result Downloads, err error) {
+func (worker *Sync) relatedDownloads(a entity.Account) (result Downloads, err error) {
 	result = make(Downloads)
 	maxResults := 1000
 
@@ -35,7 +35,7 @@ func (s *Sync) relatedDownloads(a entity.Account) (result Downloads, err error)
 
 	// Group results by directory and base name
 	for i, file := range files {
-		k := fs.AbsBase(file.RemoteName, s.conf.Settings().Index.Group)
+		k := fs.AbsBase(file.RemoteName, worker.conf.Settings().Index.Group)
 
 		result[k] = append(result[k], file)
 
@@ -49,7 +49,7 @@ func (s *Sync) relatedDownloads(a entity.Account) (result Downloads, err error)
 }
 
 // Downloads remote files in batches and imports / indexes them
-func (s *Sync) download(a entity.Account) (complete bool, err error) {
+func (worker *Sync) download(a entity.Account) (complete bool, err error) {
 	// Set up index worker
 	indexJobs := make(chan photoprism.IndexJob)
 
@@ -61,10 +61,10 @@ func (s *Sync) download(a entity.Account) (complete bool, err error) {
 	go photoprism.ImportWorker(importJobs)
 	defer close(importJobs)
 
-	relatedFiles, err := s.relatedDownloads(a)
+	relatedFiles, err := worker.relatedDownloads(a)
 
 	if err != nil {
-		log.Errorf("sync: %s", err.Error())
+		worker.logError(err)
 		return false, err
 	}
 
@@ -81,16 +81,16 @@ func (s *Sync) download(a entity.Account) (complete bool, err error) {
 	var baseDir string
 
 	if a.SyncFilenames {
-		baseDir = s.conf.OriginalsPath()
+		baseDir = worker.conf.OriginalsPath()
 	} else {
-		baseDir = fmt.Sprintf("%s/%d", s.downloadPath(), a.ID)
+		baseDir = fmt.Sprintf("%s/%d", worker.downloadPath(), a.ID)
 	}
 
 	done := make(map[string]bool)
 
 	for _, files := range relatedFiles {
 		for i, file := range files {
-			if mutex.Sync.Canceled() {
+			if mutex.SyncWorker.Canceled() {
 				return false, nil
 			}
 
@@ -106,7 +106,7 @@ func (s *Sync) download(a entity.Account) (complete bool, err error) {
 				file.Status = entity.FileSyncExists
 			} else {
 				if err := client.Download(file.RemoteName, localName, false); err != nil {
-					log.Errorf("sync: %s", err.Error())
+					worker.logError(err)
 					file.Errors++
 					file.Error = err.Error()
 				} else {
@@ -114,13 +114,13 @@ func (s *Sync) download(a entity.Account) (complete bool, err error) {
 					file.Status = entity.FileSyncDownloaded
 				}
 
-				if mutex.Sync.Canceled() {
+				if mutex.SyncWorker.Canceled() {
 					return false, nil
 				}
 			}
 
 			if err := entity.Db().Save(&file).Error; err != nil {
-				log.Errorf("sync: %s", err.Error())
+				worker.logError(err)
 			} else {
 				files[i] = file
 			}
@@ -137,10 +137,10 @@ func (s *Sync) download(a entity.Account) (complete bool, err error) {
 				continue
 			}
 
-			related, err := mf.RelatedFiles(s.conf.Settings().Index.Group)
+			related, err := mf.RelatedFiles(worker.conf.Settings().Index.Group)
 
 			if err != nil {
-				log.Warnf("sync: %s", err.Error())
+				worker.logWarn(err)
 				continue
 			}
 
@@ -180,9 +180,7 @@ func (s *Sync) download(a entity.Account) (complete bool, err error) {
 	}
 
 	if len(done) > 0 {
-		if err := entity.UpdatePhotoCounts(); err != nil {
-			log.Errorf("sync: %s", err)
-		}
+		worker.logError(entity.UpdatePhotoCounts())
 	}
 
 	return false, nil

internal/workers/sync_refresh.go

@@ -9,7 +9,7 @@ import (
 )
 
 // Updates the local list of remote files so that they can be downloaded in batches
-func (s *Sync) refresh(a entity.Account) (complete bool, err error) {
+func (worker *Sync) refresh(a entity.Account) (complete bool, err error) {
 	if a.AccType != remote.ServiceWebDAV {
 		return false, nil
 	}
@@ -26,7 +26,7 @@ func (s *Sync) refresh(a entity.Account) (complete bool, err error) {
 	dirs := append(subDirs.Abs(), a.SyncPath)
 
 	for _, dir := range dirs {
-		if mutex.Sync.Canceled() {
+		if mutex.SyncWorker.Canceled() {
 			return false, nil
 		}
 
@@ -38,7 +38,7 @@ func (s *Sync) refresh(a entity.Account) (complete bool, err error) {
 		}
 
 		for _, file := range files {
-			if mutex.Sync.Canceled() {
+			if mutex.SyncWorker.Canceled() {
 				return false, nil
 			}
 
@@ -69,11 +69,11 @@ func (s *Sync) refresh(a entity.Account) (complete bool, err error) {
 			}
 
 			if f.Status == entity.FileSyncIgnore && mediaType == fs.MediaRaw && a.SyncRaw {
-				s.report(f.Update("Status", entity.FileSyncNew))
+				worker.logError(f.Update("Status", entity.FileSyncNew))
 			}
 
 			if f.Status == entity.FileSyncDownloaded && !f.RemoteDate.Equal(file.Date) {
-				s.report(f.Updates(map[string]interface{}{
+				worker.logError(f.Updates(map[string]interface{}{
 					"Status":     entity.FileSyncNew,
 					"RemoteDate": file.Date,
 					"RemoteSize": file.Size,

internal/workers/sync_test.go

@@ -0,0 +1,16 @@
+package workers
+
+import (
+	"testing"
+
+	"github.com/photoprism/photoprism/internal/config"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewSync(t *testing.T) {
+	conf := config.TestConfig()
+
+	worker := NewSync(conf)
+
+	assert.IsType(t, &Sync{}, worker)
+}

internal/workers/sync_upload.go

@@ -13,7 +13,7 @@ import (
 )
 
 // Uploads local files to a remote account
-func (s *Sync) upload(a entity.Account) (complete bool, err error) {
+func (worker *Sync) upload(a entity.Account) (complete bool, err error) {
 	maxResults := 250
 
 	// Get upload file list from database
@@ -33,11 +33,11 @@ func (s *Sync) upload(a entity.Account) (complete bool, err error) {
 	existingDirs := make(map[string]string)
 
 	for _, file := range files {
-		if mutex.Sync.Canceled() {
+		if mutex.SyncWorker.Canceled() {
 			return false, nil
 		}
 
-		fileName := path.Join(s.conf.OriginalsPath(), file.FileName)
+		fileName := path.Join(worker.conf.OriginalsPath(), file.FileName)
 		remoteName := path.Join(a.SyncPath, file.FileName)
 		remoteDir := filepath.Dir(remoteName)
 
@@ -49,7 +49,7 @@ func (s *Sync) upload(a entity.Account) (complete bool, err error) {
 		}
 
 		if err := client.Upload(fileName, remoteName); err != nil {
-			log.Errorf("sync: %s", err.Error())
+			worker.logError(err)
 			continue // try again next time
 		}
 
@@ -63,13 +63,11 @@ func (s *Sync) upload(a entity.Account) (complete bool, err error) {
 		fileSync.Error = ""
 		fileSync.Errors = 0
 
-		if mutex.Sync.Canceled() {
+		if mutex.SyncWorker.Canceled() {
 			return false, nil
 		}
 
-		if err := entity.Db().Save(&fileSync).Error; err != nil {
-			log.Errorf("sync: %s", err.Error())
-		}
+		worker.logError(entity.Db().Save(&fileSync).Error)
 	}
 
 	return false, nil

internal/workers/workers.go

@@ -21,10 +21,12 @@ func Start(conf *config.Config) {
 			case <-stop:
 				log.Info("shutting down workers")
 				ticker.Stop()
-				mutex.Share.Cancel()
-				mutex.Sync.Cancel()
+				mutex.GroomWorker.Cancel()
+				mutex.ShareWorker.Cancel()
+				mutex.SyncWorker.Cancel()
 				return
 			case <-ticker.C:
+				StartGroom(conf)
 				StartShare(conf)
 				StartSync(conf)
 			}
@@ -37,12 +39,24 @@ func Stop() {
 	stop <- true
 }
 
+// StartGroom runs the groom worker once.
+func StartGroom(conf *config.Config) {
+	if !mutex.WorkersBusy() {
+		go func() {
+			worker := NewGroom(conf)
+			if err := worker.Start(); err != nil {
+				log.Error(err)
+			}
+		}()
+	}
+}
+
 // StartShare runs the share worker once.
 func StartShare(conf *config.Config) {
-	if !mutex.Share.Busy() {
+	if !mutex.ShareWorker.Busy() {
 		go func() {
-			s := NewShare(conf)
-			if err := s.Start(); err != nil {
+			worker := NewShare(conf)
+			if err := worker.Start(); err != nil {
 				log.Error(err)
 			}
 		}()
@@ -51,10 +65,10 @@ func StartShare(conf *config.Config) {
 
 // StartShare runs the sync worker once.
 func StartSync(conf *config.Config) {
-	if !mutex.Sync.Busy() {
+	if !mutex.SyncWorker.Busy() {
 		go func() {
-			s := NewSync(conf)
-			if err := s.Start(); err != nil {
+			worker := NewSync(conf)
+			if err := worker.Start(); err != nil {
 				log.Error(err)
 			}
 		}()

internal/workers/workers_test.go

@@ -0,0 +1,22 @@
+package workers
+
+import (
+	"os"
+	"testing"
+
+	"github.com/photoprism/photoprism/internal/config"
+	"github.com/sirupsen/logrus"
+)
+
+func TestMain(m *testing.M) {
+	log = logrus.StandardLogger()
+	log.SetLevel(logrus.DebugLevel)
+
+	c := config.TestConfig()
+
+	code := m.Run()
+
+	_ = c.CloseDb()
+
+	os.Exit(code)
+}