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1// SPDX-FileCopyrightText: 2025 The Project Pterodactyl Developers
2//
3// SPDX-License-Identifier: MPL-2.0
4
5import Foundation
6
7public actor AsyncThunk<Value> {
8 private var storage: Value?
9 private var thunk: (() async -> Value)?
10
11 public init(thunk: @escaping @Sendable () async -> Value) {
12 self.thunk = thunk
13 }
14
15 public init(value: Value) {
16 self.storage = value
17 }
18
19 public func value() async -> Value {
20 if let storage { return storage }
21 if let thunk {
22 let computed = await thunk()
23 self.storage = computed
24 self.thunk = nil
25 return computed
26 }
27 fatalError("AsyncThunk has neither thunk nor storage.")
28 }
29}