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https://github.com/mas-cli/mas
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1a4af7a897
If we're going to depend on the dispatch_group we should ensure we enter before it could possibly be exited. In reality it should never happy as `purchase.perform` does an XPC call but there's no harm in being cautious.
51 lines
1.5 KiB
Swift
51 lines
1.5 KiB
Swift
//
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// Downloader.swift
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// mas-cli
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//
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// Created by Andrew Naylor on 21/08/2015.
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// Copyright (c) 2015 Andrew Naylor. All rights reserved.
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//
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func download(adamId: UInt64) -> MASError? {
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guard let account = ISStoreAccount.primaryAccount else {
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return MASError(code: .NotSignedIn)
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}
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let group = dispatch_group_create()
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let purchase = SSPurchase(adamId: adamId, account: account)
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var purchaseError: MASError?
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dispatch_group_enter(group)
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purchase.perform { purchase, unused, error, response in
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if let error = error {
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purchaseError = MASError(code: .PurchaseError, sourceError: error)
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dispatch_group_leave(group)
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return
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}
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if let downloads = response.downloads where downloads.count > 0 {
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let observer = PurchaseDownloadObserver(purchase: purchase)
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observer.errorHandler = { error in
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purchaseError = error
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dispatch_group_leave(group)
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}
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observer.completionHandler = {
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dispatch_group_leave(group)
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}
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CKDownloadQueue.sharedDownloadQueue().addObserver(observer)
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}
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else {
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print("No downloads")
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purchaseError = MASError(code: .NoDownloads)
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dispatch_group_leave(group)
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}
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}
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dispatch_group_wait(group, DISPATCH_TIME_FOREVER)
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return purchaseError
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}
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