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//
// Copyright (c) 2015-2024 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// 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 madmin
import (
"encoding/base64"
)
//go:generate msgp -file $GOFILE
// TierGCS represents the remote tier configuration for Google Cloud Storage
type TierGCS struct {
Endpoint string `json:",omitempty"` // custom endpoint is not supported for GCS
Creds string `json:",omitempty"` // base64 encoding of credentials.json
Bucket string `json:",omitempty"`
Prefix string `json:",omitempty"`
Region string `json:",omitempty"`
StorageClass string `json:",omitempty"`
}
// GCSOptions supports NewTierGCS to take variadic options
type GCSOptions func(*TierGCS) error
// GCSPrefix helper to supply optional object prefix to NewTierGCS
func GCSPrefix(prefix string) func(*TierGCS) error {
return func(gcs *TierGCS) error {
gcs.Prefix = prefix
return nil
}
}
// GCSRegion helper to supply optional region to NewTierGCS
func GCSRegion(region string) func(*TierGCS) error {
return func(gcs *TierGCS) error {
gcs.Region = region
return nil
}
}
// GCSStorageClass helper to supply optional storage class to NewTierGCS
func GCSStorageClass(sc string) func(*TierGCS) error {
return func(gcs *TierGCS) error {
gcs.StorageClass = sc
return nil
}
}
// GetCredentialJSON method returns the credentials JSON bytes.
func (gcs *TierGCS) GetCredentialJSON() ([]byte, error) {
return base64.URLEncoding.DecodeString(gcs.Creds)
}
// NewTierGCS returns a TierConfig of GCS type. Returns error if the given
// parameters are invalid like name is empty etc.
func NewTierGCS(name string, credsJSON []byte, bucket string, options ...GCSOptions) (*TierConfig, error) {
if name == "" {
return nil, ErrTierNameEmpty
}
creds := base64.URLEncoding.EncodeToString(credsJSON)
gcs := &TierGCS{
Creds: creds,
Bucket: bucket,
// Defaults
// endpoint is meant only for client-side display purposes
Endpoint: "https://storage.googleapis.com/",
Prefix: "",
Region: "",
StorageClass: "",
}
for _, option := range options {
err := option(gcs)
if err != nil {
return nil, err
}
}
return &TierConfig{
Version: TierConfigVer,
Type: GCS,
Name: name,
GCS: gcs,
}, nil
}
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