/
service.go
91 lines (80 loc) · 2.38 KB
/
service.go
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// Copyright (c) 2015-2018 Cinderblocks Design Co.
//
// This file is part of snapper
// (see https://bitbucket.org/cinderblocks/snapper).
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"io"
)
type service struct {
model AssetModel
store AssetStore
}
type Service interface {
GetFullAssetData(id string) (data FullAssetData, err error)
GetAssetMetaData(id string) (data AssetBase, err error)
GetAssetData(id string) (io.ReadCloser, int8, error)
CreateAsset(data *FullAssetData) error
AssetExists(id string) bool
AssetsExist(ids []string) []bool
}
func CreateService(db Database, dataDir, spoolDir string) Service {
return &service{
model: CreateAssetModel(db),
store: CreateAssetStore(dataDir, spoolDir),
}
}
func (s service) GetFullAssetData(id string) (data FullAssetData, err error) {
data.AssetBase, err = s.model.Get(id)
if err == nil {
data.Data, err = s.store.GetAsBase64(data.Hash)
}
return
}
func (s service) GetAssetMetaData(id string) (data AssetBase, err error) {
data, err = s.model.Get(id)
return
}
func (s service) GetAssetData(id string) (io.ReadCloser, int8, error) {
hash, assetType, err := s.model.GetHashAndType(id)
if err != nil {
return nil, 0, err
}
reader, err := s.store.Load(hash)
return reader, assetType, err
}
func (s service) CreateAsset(data *FullAssetData) error {
var err error = nil
data.Hash, err = s.store.Store(data.Data)
if err != nil {
return err
}
return s.model.Put(data.AssetBase)
}
func (s service) AssetExists(id string) bool {
hash, err := s.model.GetHash(id)
if err != nil {
return false
}
return s.store.Exists(hash)
}
func (s service) AssetsExist(ids []string) []bool {
result := make([]bool, len(ids))
for idx, id := range ids {
result[idx] = s.AssetExists(id)
}
return result
}