add auth backend converter

closes #65

1 files changed, 71 insertions, 0 deletions

diff --git a/cmd/mt-auth-convert/convert.go b/cmd/mt-auth-convert/convert.go
new file mode 100644
index 0000000..588f49b
--- /dev/null
+++ b/cmd/mt-auth-convert/convert.go
@@ -0,0 +1,71 @@
+/*
+mt-auth-convert converts between authentication backends.
+
+Usage:
+
+	mt-auth-convert from to
+
+where from is the format to convert from
+and to is the format to convert to
+*/
+package main
+
+import (
+	"log"
+	"os"
+
+	proxy "github.com/HimbeerserverDE/mt-multiserver-proxy"
+)
+
+func main() {
+	if len(os.Args) != 3 {
+		log.Fatal("usage: mt-auth-convert from to")
+	}
+
+	var inBackend proxy.AuthBackend
+	switch os.Args[1] {
+	case "files":
+		inBackend = proxy.AuthFiles{}
+	case "mtsqlite3":
+		var err error
+		inBackend, err = proxy.NewAuthMTSQLite3()
+		if err != nil {
+			log.Fatal(err)
+		}
+	default:
+		log.Fatal("invalid input auth backend")
+	}
+
+	var outBackend proxy.AuthBackend
+	switch os.Args[2] {
+	case "files":
+		outBackend = proxy.AuthFiles{}
+	case "mtsqlite3":
+		var err error
+		outBackend, err = proxy.NewAuthMTSQLite3()
+		if err != nil {
+			log.Fatal(err)
+		}
+	default:
+		log.Fatal("invalid output auth backend")
+	}
+
+	if err := convert(outBackend, inBackend); err != nil {
+		log.Fatal(err)
+	}
+
+	log.Print("conversion successful")
+}
+
+func convert(dst, src proxy.AuthBackend) error {
+	users, err := src.Export()
+	if err != nil {
+		return err
+	}
+
+	if err := dst.Import(users); err != nil {
+		return err
+	}
+
+	return nil
+}