From c04bbf9c82f216891ba44b8b5b621b8020963086 Mon Sep 17 00:00:00 2001
From: Laria Carolin Chabowski <laria@laria.me>
Date: Fri, 29 Sep 2017 07:57:09 +0200
Subject: Restructure package storage

---
 storage/registry/registry.go | 58 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 56 insertions(+), 2 deletions(-)

(limited to 'storage/registry')

diff --git a/storage/registry/registry.go b/storage/registry/registry.go
index dec7c32..ad66c6a 100644
--- a/storage/registry/registry.go
+++ b/storage/registry/registry.go
@@ -1,13 +1,67 @@
 package registry
 
 import (
+	"code.laria.me/petrific/config"
 	"code.laria.me/petrific/storage"
 	"code.laria.me/petrific/storage/cloud"
+	"code.laria.me/petrific/storage/local"
+	"code.laria.me/petrific/storage/memory"
+	"errors"
+	"fmt"
 )
 
 // List af all available storage types
 var StorageTypes = map[string]storage.CreateStorageFromConfig{
-	"local":           storage.LocalStorageFromConfig,
-	"memory":          storage.MemoryStorageFromConfig,
+	"local":           local.LocalStorageFromConfig,
+	"memory":          memory.MemoryStorageFromConfig,
 	"openstack-swift": cloud.SwiftStorageCreator(),
 }
+
+var notFoundErr = errors.New("Storage not found")
+
+type unknownMethodErr string
+
+func (method unknownMethodErr) Error() string {
+	return fmt.Sprintf("Method %s unknown", string(method))
+}
+
+type storageConfErr struct {
+	name string
+	err  error
+}
+
+func (e storageConfErr) Error() string {
+	return fmt.Sprintf("Failed setting up storage %s: %s", e.name, e.err.Error())
+}
+
+func loadStorage(conf config.Config, storageName string) (storage.Storage, error) {
+	storageOptions, ok := conf.Storage[storageName]
+	if !ok {
+		return nil, notFoundErr
+	}
+
+	var method string
+	if err := storageOptions.Get("method", &method); err != nil {
+		return nil, err
+	}
+
+	st, ok := StorageTypes[method]
+	if !ok {
+		return nil, unknownMethodErr(method)
+	}
+
+	s, err := st(conf, storageName)
+	if err != nil {
+		return nil, err
+	}
+
+	return s, nil
+}
+
+func LoadStorage(conf config.Config, storageName string) (storage.Storage, error) {
+	s, err := loadStorage(conf, storageName)
+	if err != nil {
+		return nil, storageConfErr{storageName, err}
+	}
+	return s, nil
+}
-- 
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