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29 lines
733 B
29 lines
733 B
//
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// Promise+Validate.swift
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// then
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//
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// Created by Sacha Durand Saint Omer on 22/02/2017.
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// Copyright © 2017 s4cha. All rights reserved.
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//
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import Foundation
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extension Promise {
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@discardableResult
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public func validate(withError: Error = PromiseError.validationFailed,
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_ assertionBlock:@escaping ((T) -> Bool)) -> Promise<T> {
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let p = newLinkedPromise()
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syncStateWithCallBacks(
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success: { t in
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if assertionBlock(t) {
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p.fulfill(t)
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} else {
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p.reject(withError)
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}
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},
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failure: p.reject,
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progress: p.setProgress)
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return p
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}
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}
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