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// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package storage provides functions for accessing Google Cloud Storge buckets.
package storage
import (
"context"
"errors"
"os"
"cloud.google.com/go/storage"
"firebase.google.com/go/v4/internal"
)
// Client is the interface for the Firebase Storage service.
type Client struct {
client *storage.Client
bucket string
}
// NewClient creates a new instance of the Firebase Storage Client.
//
// This function can only be invoked from within the SDK. Client applications should access the
// the Storage service through firebase.App.
func NewClient(ctx context.Context, c *internal.StorageConfig) (*Client, error) {
if os.Getenv("STORAGE_EMULATOR_HOST") == "" && os.Getenv("FIREBASE_STORAGE_EMULATOR_HOST") != "" {
os.Setenv("STORAGE_EMULATOR_HOST", os.Getenv("FIREBASE_STORAGE_EMULATOR_HOST"))
}
client, err := storage.NewClient(ctx, c.Opts...)
if err != nil {
return nil, err
}
return &Client{client: client, bucket: c.Bucket}, nil
}
// DefaultBucket returns a handle to the default Cloud Storage bucket.
//
// To use this method, the default bucket name must be specified via firebase.Config when
// initializing the App.
func (c *Client) DefaultBucket() (*storage.BucketHandle, error) {
return c.Bucket(c.bucket)
}
// Bucket returns a handle to the specified Cloud Storage bucket.
func (c *Client) Bucket(name string) (*storage.BucketHandle, error) {
if name == "" {
return nil, errors.New("bucket name not specified")
}
return c.client.Bucket(name), nil
}
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