Add folder synchronization status.

Also add ability to force re-synchronization.

1 files changed, 78 insertions, 5 deletions

diff --git a/lib/syncthing/folder-st.go b/lib/syncthing/folder-st.go
index ffcd284..da27062 100644
--- a/lib/syncthing/folder-st.go
+++ b/lib/syncthing/folder-st.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/iotbzh/xds-server/lib/folder"
 	"github.com/iotbzh/xds-server/lib/xdsconfig"
+	uuid "github.com/satori/go.uuid"
 	"github.com/syncthing/syncthing/lib/config"
 )
 
@@ -13,10 +14,13 @@ import (
 
 // STFolder .
 type STFolder struct {
-	globalConfig *xdsconfig.Config
-	st           *SyncThing
-	fConfig      folder.FolderConfig
-	stfConfig    config.FolderConfiguration
+	globalConfig      *xdsconfig.Config
+	st                *SyncThing
+	fConfig           folder.FolderConfig
+	stfConfig         config.FolderConfiguration
+	eventIDs          []int
+	eventChangeCB     *folder.EventCB
+	eventChangeCBData *folder.EventCBData
 }
 
 // NewFolderST Create a new instance of STFolder
@@ -27,6 +31,15 @@ func (s *SyncThing) NewFolderST(gc *xdsconfig.Config) *STFolder {
 	}
 }
 
+// NewUID Get a UUID
+func (f *STFolder) NewUID(suffix string) string {
+	i := len(f.st.MyID)
+	if i > 15 {
+		i = 15
+	}
+	return uuid.NewV1().String()[:14] + f.st.MyID[:i] + "_" + suffix
+}
+
 // Add a new folder
 func (f *STFolder) Add(cfg folder.FolderConfig) (*folder.FolderConfig, error) {
 
@@ -59,6 +72,16 @@ func (f *STFolder) Add(cfg folder.FolderConfig) (*folder.FolderConfig, error) {
 			return nil, err
 		}
 
+		// Register to events to update folder status
+		for _, evName := range []string{EventStateChanged, EventFolderPaused} {
+			evID, err := f.st.Events.Register(evName, f.cbEventState, id, nil)
+			if err != nil {
+				return nil, err
+			}
+			f.eventIDs = append(f.eventIDs, evID)
+		}
+
+		f.fConfig.IsInSync = false // will be updated later by events
 		f.fConfig.Status = folder.StatusEnable
 	}
 
@@ -86,6 +109,20 @@ func (f *STFolder) Remove() error {
 	return f.st.FolderDelete(f.stfConfig.ID)
 }
 
+// RegisterEventChange requests registration for folder event change
+func (f *STFolder) RegisterEventChange(cb *folder.EventCB, data *folder.EventCBData) error {
+	f.eventChangeCB = cb
+	f.eventChangeCBData = data
+	return nil
+}
+
+// UnRegisterEventChange remove registered callback
+func (f *STFolder) UnRegisterEventChange() error {
+	f.eventChangeCB = nil
+	f.eventChangeCBData = nil
+	return nil
+}
+
 // Sync Force folder files synchronization
 func (f *STFolder) Sync() error {
 	return f.st.FolderScan(f.stfConfig.ID, "")
@@ -93,5 +130,41 @@ func (f *STFolder) Sync() error {
 
 // IsInSync Check if folder files are in-sync
 func (f *STFolder) IsInSync() (bool, error) {
-	return f.st.IsFolderInSync(f.stfConfig.ID)
+	sts, err := f.st.IsFolderInSync(f.stfConfig.ID)
+	if err != nil {
+		return false, err
+	}
+	f.fConfig.IsInSync = sts
+	return sts, nil
+}
+
+// callback use to update IsInSync status
+func (f *STFolder) cbEventState(ev Event, data *EventsCBData) {
+	prevSync := f.fConfig.IsInSync
+	prevStatus := f.fConfig.Status
+
+	switch ev.Type {
+
+	case EventStateChanged:
+		to := ev.Data["to"]
+		switch to {
+		case "scanning", "syncing":
+			f.fConfig.Status = folder.StatusSyncing
+		case "idle":
+			f.fConfig.Status = folder.StatusEnable
+		}
+		f.fConfig.IsInSync = (to == "idle")
+
+	case EventFolderPaused:
+		if f.fConfig.Status == folder.StatusEnable {
+			f.fConfig.Status = folder.StatusPause
+		}
+		f.fConfig.IsInSync = false
+	}
+
+	if f.eventChangeCB != nil &&
+		(prevSync != f.fConfig.IsInSync || prevStatus != f.fConfig.Status) {
+		cpConf := f.fConfig
+		(*f.eventChangeCB)(&cpConf, f.eventChangeCBData)
+	}
 }