add snapshots list api

app.go

@@ -503,7 +503,7 @@ func (a *App) Transfer() error {
 	return nil
 }
 
-func (a *App) Boxes() []*Box {
+func (a *App) AllBoxes() []*Box {
 	log.WithFields(log.Fields{"app": a.name}).Debugf("starting")
 	defer log.WithFields(log.Fields{"app": a.name}).Debugf("done")
 
@@ -534,6 +534,33 @@ func (a *App) Boxes() []*Box {
 	return bx
 }
 
+func (a *App) SourceBoxes() []*Box {
+	log.WithFields(log.Fields{"app": a.name}).Debugf("starting")
+	defer log.WithFields(log.Fields{"app": a.name}).Debugf("done")
+
+	bm := make(map[string]struct{})
+
+	for _, s := range a.sources {
+		bm[s.Box()] = struct{}{}
+	}
+
+	for _, b := range a.before {
+		bm[b.Box()] = struct{}{}
+	}
+
+	for _, af := range a.after {
+		bm[af.Box()] = struct{}{}
+	}
+
+	bx := make([]*Box, 0)
+
+	for n := range bm {
+		bx = append(bx, cfg.box[n])
+	}
+
+	return bx
+}
+
 func (a *App) RunStandaloneTime(now time.Time) error {
 	log.WithFields(log.Fields{"app": a.name}).Debugf("starting")
 	defer log.WithFields(log.Fields{"app": a.name}).Debugf("done")
@@ -548,7 +575,7 @@ func (a *App) RunStandaloneTime(now time.Time) error {
 	cfgRun = true
 	defer func() { cfgRun = false }()
 
-	boxes := a.Boxes()
+	boxes := a.AllBoxes()
 
 	var wg sync.WaitGroup
 
@@ -593,7 +620,7 @@ func (a *App) RunStandaloneSchedule(name string) error {
 	cfgRun = true
 	defer func() { cfgRun = false }()
 
-	boxes := a.Boxes()
+	boxes := a.AllBoxes()
 
 	var wg sync.WaitGroup
 
@@ -614,3 +641,48 @@ func (a *App) RunStandaloneSchedule(name string) error {
 
 	return a.RunSchedule(name, time.Now())
 }
+
+func (a *App) Snapshots() ([]string, error) {
+	log.WithFields(log.Fields{"app": a.name}).Debugf("starting")
+	defer log.WithFields(log.Fields{"app": a.name}).Debugf("done")
+
+	CfgLock()
+	defer CfgUnlock()
+
+	cfgRun = true
+	defer func() { cfgRun = false }()
+
+	boxes := a.SourceBoxes()
+
+	var wg sync.WaitGroup
+
+	// Open boxes
+	for _, b := range boxes {
+		wg.Add(1)
+		go func(box *Box) {
+			defer wg.Done()
+			if err := box.Open(); err != nil {
+				log.WithFields(log.Fields{"name": box.name, "call": "Open", "error": err}).Errorf("")
+				return
+			}
+		}(b)
+		defer b.Close()
+	}
+
+	wg.Wait()
+
+	names := make([]string, 0)
+
+	for _, src := range a.sources {
+		if snapshots, err := src.ValidSnapshots(); err != nil {
+			log.WithFields(log.Fields{"call": "ValidSnapshots", "attr": src, "error": err}).Errorf("")
+			return names, err
+		} else {
+			for _, snapshot := range snapshots {
+				names = append(names, snapshot.name)
+			}
+		}
+	}
+
+	return names, nil
+}