74 lines
1.9 KiB
Swift
74 lines
1.9 KiB
Swift
/// An object for resolving promises
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public final class Resolver<T> {
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let box: Box<Result<T, Error>>
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init(_ box: Box<Result<T, Error>>) {
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self.box = box
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}
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deinit {
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if case .pending = box.inspect() {
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conf.logHandler(.pendingPromiseDeallocated)
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}
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}
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}
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public extension Resolver {
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/// Fulfills the promise with the provided value
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func fulfill(_ value: T) {
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box.seal(.success(value))
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}
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/// Rejects the promise with the provided error
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func reject(_ error: Error) {
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box.seal(.failure(error))
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}
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/// Resolves the promise with the provided result
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func resolve(_ result: Result<T, Error>) {
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box.seal(result)
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}
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/// Resolves the promise with the provided value or error
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func resolve(_ obj: T?, _ error: Error?) {
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if let error = error {
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reject(error)
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} else if let obj = obj {
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fulfill(obj)
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} else {
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reject(PMKError.invalidCallingConvention)
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}
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}
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/// Fulfills the promise with the provided value unless the provided error is non-nil
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func resolve(_ obj: T, _ error: Error?) {
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if let error = error {
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reject(error)
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} else {
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fulfill(obj)
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}
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}
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/// Resolves the promise, provided for non-conventional value-error ordered completion handlers.
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func resolve(_ error: Error?, _ obj: T?) {
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resolve(obj, error)
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}
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}
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extension Resolver where T == Void {
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/// Fulfills the promise unless error is non-nil
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public func resolve(_ error: Error?) {
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if let error = error {
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reject(error)
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} else {
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fulfill(())
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}
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}
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/// Fulfills the promise
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/// - Note: underscore is present due to: https://github.com/mxcl/PromiseKit/issues/990
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public func fulfill() {
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self.fulfill(())
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}
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}
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