Add dump helpers

dump.go

@@ -1,6 +1,9 @@
 package main
 
-import "github.com/docker/docker/api/types"
+import (
+	"github.com/docker/docker/api/types"
+	"strings"
+)
 
 type Dumper interface {
 	Dump() error
@@ -18,3 +21,25 @@ func NewDumperFromContainer(container *types.ContainerJSON) Dumper {
 
 	return nil
 }
+
+func dumpAllDatabases() error {
+	lock.Lock()
+	defer lock.Unlock()
+
+	for _, dumper := range store {
+		err := dumper.Dump()
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func getDumpFilename(containerName string) string {
+	if strings.HasPrefix(containerName, "/") {
+		containerName = strings.TrimPrefix(containerName, "/")
+	}
+
+	return config.fullCurrentBackupPath + containerName + ".sql"
+}