refactor(securejsondata): extract to class

Extract from pluginsettings class so that the
securejsondata type can be used in the other
classes. Encrypt and decrypt functions
extracted too.

pkg/components/securejsondata/securejsondata.go

@@ -0,0 +1,24 @@
+package securejsondata
+
+import (
+	"github.com/grafana/grafana/pkg/setting"
+	"github.com/grafana/grafana/pkg/util"
+)
+
+type SecureJsonData map[string][]byte
+
+func (s SecureJsonData) Decrypt() map[string]string {
+	decrypted := make(map[string]string)
+	for key, data := range s {
+		decrypted[key] = string(util.Decrypt(data, setting.SecretKey))
+	}
+	return decrypted
+}
+
+func GetEncryptedJsonData(sjd map[string]string) SecureJsonData {
+	encrypted := make(SecureJsonData)
+	for key, data := range sjd {
+		encrypted[key] = util.Encrypt([]byte(data), setting.SecretKey)
+	}
+	return encrypted
+}