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AsyncAwait.swift
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AsyncAwait.swift
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// Copyright 2021 Google LLC
//
// 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.
import FirebaseStorage
#if swift(>=5.5)
@available(iOS 15, *)
public extension StorageReference {
/// Asynchronously downloads the object at the StorageReference to a Data object in memory.
/// A Data object of the provided max size will be allocated, so ensure that the device has enough free
/// memory to complete the download. For downloading large files, write may be a better option.
///
/// - Parameters:
/// - size: The maximum size in bytes to download. If the download exceeds this size
/// the task will be cancelled and an error will be thrown.
/// - Returns: Data object.
func data(maxSize: Int64) async throws -> Data {
typealias DataContinuation = CheckedContinuation<Data, Error>
return try await withCheckedThrowingContinuation { (continuation: DataContinuation) in
// TODO: Use task to handle progress and cancellation.
_ = self.getData(maxSize: maxSize) { result in
continuation.resume(with: result)
}
}
}
/// Asynchronously uploads data to the currently specified StorageReference.
/// This is not recommended for large files, and one should instead upload a file from disk.
/// in the Firebase Console if desired.
///
/// - Parameters:
/// - uploadData: The Data to upload.
/// - metadata: Optional StorageMetadata containing additional information (MIME type, etc.)
/// about the object being uploaded.
/// - Returns: StorageMetadata containing additional information about the object being uploaded.
func putDataAsync(_ uploadData: Data,
metadata: StorageMetadata? = nil) async throws -> StorageMetadata {
typealias MetadataContinuation = CheckedContinuation<StorageMetadata, Error>
return try await withCheckedThrowingContinuation { (continuation: MetadataContinuation) in
// TODO: Use task to handle progress and cancellation.
_ = self.putData(uploadData, metadata: metadata) { result in
continuation.resume(with: result)
}
}
}
/// Asynchronously uploads a file to the currently specified StorageReference.
///
/// - Parameters:
/// - url: A URL representing the system file path of the object to be uploaded.
/// - metadata: Optional StorageMetadata containing additional information (MIME type, etc.)
/// about the object being uploaded.
/// - Returns: StorageMetadata containing additional information about the object being uploaded.
func putFileAsync(from url: URL,
metadata: StorageMetadata? = nil) async throws -> StorageMetadata {
typealias MetadataContinuation = CheckedContinuation<StorageMetadata, Error>
return try await withCheckedThrowingContinuation { (continuation: MetadataContinuation) in
// TODO: Use task to handle progress and cancellation.
_ = self.putFile(from: url, metadata: metadata) { result in
continuation.resume(with: result)
}
}
}
/// Asynchronously downloads the object at the current path to a specified system filepath.
///
/// - Parameters:
/// - fileUrl: A URL representing the system file path of the object to be uploaded.
/// - Returns: URL pointing to the file path of the downloaded file.
func writeAsync(toFile fileURL: URL) async throws -> URL {
typealias URLContinuation = CheckedContinuation<URL, Error>
return try await withCheckedThrowingContinuation { (continuation: URLContinuation) in
// TODO: Use task to handle progress and cancellation.
_ = self.write(toFile: fileURL) { result in
continuation.resume(with: result)
}
}
}
}
#endif