finally can fix the Load() and Save() names

1 files changed, 53 insertions, 0 deletions

diff --git a/versionCheck.go b/versionCheck.go
new file mode 100644
index 0000000..1beb7a5
--- /dev/null
+++ b/versionCheck.go
@@ -0,0 +1,53 @@
+package config
+
+import (
+	"errors"
+
+	"go.wit.com/lib/protobuf/filepb"
+	"google.golang.org/protobuf/proto"
+)
+
+// verify 'version' for .pb files
+// application should die if they don't match
+// returns (newVersion, oldVersion, error)
+func VersionCheck(pb proto.Message) (string, string, error) {
+	fullname, err := GetFilename(pb)
+	if err != nil {
+		return "", "", err
+	}
+	return VersionCheckFile(pb, fullname)
+}
+
+// verify 'version' for .pb files
+// application should die if they don't match
+// returns (newVersion, oldVersion, error)
+func VersionCheckFile(pb proto.Message, filename string) (string, string, error) {
+	var newVersion string
+	var newUuid string
+	var err error
+
+	newVersion, err = GetString(pb, "version")
+	if err != nil {
+		return newVersion, "", err
+	}
+
+	newUuid, err = GetString(pb, "uuid")
+	if err != nil {
+		return newVersion, newUuid, err
+	}
+
+	oldVersion, oldUuid, err := filepb.IdentifyPB(filename)
+	if err != nil {
+		return newVersion, newUuid, err
+	}
+
+	if newVersion != oldVersion {
+		return newVersion, oldVersion, errors.New("version mismatch")
+	}
+
+	if newUuid != oldUuid {
+		return newVersion, oldVersion, errors.New("UUID mismatch")
+	}
+
+	return newVersion, oldVersion, nil
+}