mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-10 22:45:59 +05:45
63 lines
2.2 KiB
Swift
63 lines
2.2 KiB
Swift
/*
|
|
* Copyright 2019 Google
|
|
*
|
|
* 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 FirebaseFirestore
|
|
|
|
/**
|
|
* A protocol describing the encodable properties of a Timestamp.
|
|
*
|
|
* Note: this protocol exists as a workaround for the Swift compiler: if the Timestamp class
|
|
* was extended directly to conform to Codable, the methods implementing the protocol would be need
|
|
* to be marked required but that can't be done in an extension. Declaring the extension on the
|
|
* protocol sidesteps this issue.
|
|
*/
|
|
private protocol CodableTimestamp: Codable {
|
|
var seconds: Int64 { get }
|
|
var nanoseconds: Int32 { get }
|
|
|
|
init(seconds: Int64, nanoseconds: Int32)
|
|
}
|
|
|
|
/** The keys in a Timestamp. Must match the properties of CodableTimestamp. */
|
|
private enum TimestampKeys: String, CodingKey {
|
|
case seconds
|
|
case nanoseconds
|
|
}
|
|
|
|
/**
|
|
* An extension of Timestamp that implements the behavior of the Codable protocol.
|
|
*
|
|
* Note: this is implemented manually here because the Swift compiler can't synthesize these methods
|
|
* when declaring an extension to conform to Codable.
|
|
*/
|
|
extension CodableTimestamp {
|
|
public init(from decoder: Decoder) throws {
|
|
let container = try decoder.container(keyedBy: TimestampKeys.self)
|
|
let seconds = try container.decode(Int64.self, forKey: .seconds)
|
|
let nanoseconds = try container.decode(Int32.self, forKey: .nanoseconds)
|
|
self.init(seconds: seconds, nanoseconds: nanoseconds)
|
|
}
|
|
|
|
public func encode(to encoder: Encoder) throws {
|
|
var container = encoder.container(keyedBy: TimestampKeys.self)
|
|
try container.encode(seconds, forKey: .seconds)
|
|
try container.encode(nanoseconds, forKey: .nanoseconds)
|
|
}
|
|
}
|
|
|
|
/** Extends Timestamp to conform to Codable. */
|
|
extension Timestamp: CodableTimestamp {}
|