//
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// ProductsInfoController.swift
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// SwiftyStoreKit
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//
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// Copyright (c) 2015 Andrea Bizzotto (bizz84@gmail.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import Foundation
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import StoreKit
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protocol InAppProductRequestBuilder: class {
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func request(productIds: Set<String>, callback: @escaping InAppProductRequestCallback) -> InAppProductRequest
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}
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class InAppProductQueryRequestBuilder: InAppProductRequestBuilder {
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func request(productIds: Set<String>, callback: @escaping InAppProductRequestCallback) -> InAppProductRequest {
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return InAppProductQueryRequest(productIds: productIds, callback: callback)
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}
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}
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class ProductsInfoController: NSObject {
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struct InAppProductQuery {
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let request: InAppProductRequest
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var completionHandlers: [InAppProductRequestCallback]
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}
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let inAppProductRequestBuilder: InAppProductRequestBuilder
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init(inAppProductRequestBuilder: InAppProductRequestBuilder = InAppProductQueryRequestBuilder()) {
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self.inAppProductRequestBuilder = inAppProductRequestBuilder
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}
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// As we can have multiple inflight requests, we store them in a dictionary by product ids
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private var inflightRequests: [Set<String>: InAppProductQuery] = [:]
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@discardableResult
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func retrieveProductsInfo(_ productIds: Set<String>, completion: @escaping (RetrieveResults) -> Void) -> InAppProductRequest {
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if inflightRequests[productIds] == nil {
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let request = inAppProductRequestBuilder.request(productIds: productIds) { results in
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if let query = self.inflightRequests[productIds] {
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for completion in query.completionHandlers {
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completion(results)
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}
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self.inflightRequests[productIds] = nil
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} else {
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// should not get here, but if it does it seems reasonable to call the outer completion block
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completion(results)
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}
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}
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inflightRequests[productIds] = InAppProductQuery(request: request, completionHandlers: [completion])
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request.start()
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return request
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} else {
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inflightRequests[productIds]!.completionHandlers.append(completion)
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return inflightRequests[productIds]!.request
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}
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}
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}
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