//
//  Copyright (c) 2018 Touch Instinct
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the Software), to deal
//  in the Software without restriction, including without limitation the rights
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//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import RxSwift

public extension PrimitiveSequence where Trait == CompletableTrait {

    /// Returns an single that invokes the specified factory function whenever a new observer subscribes.
    ///
    /// - Parameter workUnit: Element factory function to invoke for each observer
    /// that subscribes to the resulting sequence.
    /// - Returns: A single whose observers trigger an invocation of the given element factory function.
    static func deferredJust(_ workUnit: @escaping ThrowableVoidBlock) -> Completable {
        .create { observer in
            do {
                try workUnit()
                observer(.completed)
            } catch {
                observer(.error(error))
            }

            return Disposables.create()
        }
    }
}