From db0c023fd0d756912c3f575c6ac65e99fda573cc Mon Sep 17 00:00:00 2001
From: Laria Carolin Chabowski <laria@laria.me>
Date: Mon, 2 Oct 2017 14:26:26 +0200
Subject: Add filter storage method

Also remove de/encryption in cloud storage, can be provided with a
filter storage
---
 storage/registry/filter_conf.go | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 storage/registry/filter_conf.go

(limited to 'storage/registry/filter_conf.go')

diff --git a/storage/registry/filter_conf.go b/storage/registry/filter_conf.go
new file mode 100644
index 0000000..593f238
--- /dev/null
+++ b/storage/registry/filter_conf.go
@@ -0,0 +1,39 @@
+package registry
+
+import (
+	"code.laria.me/petrific/config"
+	"code.laria.me/petrific/storage"
+	"code.laria.me/petrific/storage/filter"
+)
+
+// Unlike the other storage engines, we can not define FilterStorages
+// *FromConfig function in the package itself, because we need to reference the
+// registry package and circular imports are not allowed
+
+func filterStorageFromConfig(conf config.Config, name string) (storage.Storage, error) {
+	var storage_conf struct {
+		Base   string
+		Encode []string
+		Decode []string
+	}
+
+	if err := conf.GetStorageConfData(name, &storage_conf); err != nil {
+		return nil, err
+	}
+
+	base, err := LoadStorage(conf, storage_conf.Base)
+	if err != nil {
+		return nil, err
+	}
+
+	st := filter.FilterStorage{Base: base}
+
+	if len(storage_conf.Encode) > 0 {
+		st.Encode = filter.PipeFilter(storage_conf.Encode)
+	}
+	if len(storage_conf.Decode) > 0 {
+		st.Decode = filter.PipeFilter(storage_conf.Decode)
+	}
+
+	return st, nil
+}
-- 
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