103 lines
3.9 KiB
Swift
103 lines
3.9 KiB
Swift
//
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// Copyright (c) 2017 Touch Instinct
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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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//
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import RxSwift
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import RxCocoa
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import Alamofire
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import ObjectMapper
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import RxAlamofire
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/// Base network service implementation build on top of LeadKit extensions for Alamofire.
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/// Has an ability to automatically show / hide network activity indicator
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open class NetworkService {
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/// Enable synchronization for setting variable from different thread
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private let lock = NSRecursiveLock()
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private let requestCountVariable = Variable<Int>(0)
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public let sessionManager: Alamofire.SessionManager
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var requestCount: Driver<Int> {
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return requestCountVariable.asDriver()
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}
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/// Creates new instance of NetworkService with given Alamofire session manager
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///
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/// - Parameter sessionManager: Alamofire.SessionManager to use for requests
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public init(sessionManager: Alamofire.SessionManager) {
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self.sessionManager = sessionManager
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}
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/// Perform reactive request to get mapped ObservableMappable model and http response
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///
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/// - Parameter parameters: api parameters to pass Alamofire
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/// - Returns: Observable of tuple containing (HTTPURLResponse, ObservableMappable)
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public func rxRequest<T: ObservableMappable>(with parameters: ApiRequestParameters)
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-> Observable<(response: HTTPURLResponse, model: T)> where T.ModelType == T {
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return sessionManager.rx.responseObservableModel(requestParameters: parameters)
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.counterTracking(for: self)
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}
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/// Perform reactive request to get mapped ImmutableMappable model and http response
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///
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/// - Parameter parameters: api parameters to pass Alamofire
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/// - Returns: Observable of tuple containing (HTTPURLResponse, ImmutableMappable)
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public func rxRequest<T: ImmutableMappable>(with parameters: ApiRequestParameters)
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-> Observable<(response: HTTPURLResponse, model: T)> {
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return sessionManager.rx.responseModel(requestParameters: parameters)
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.counterTracking(for: self)
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}
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fileprivate func increaseRequestCounter() {
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lock.lock()
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requestCountVariable.value += 1
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lock.unlock()
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}
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fileprivate func decreaseRequestCounter() {
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lock.lock()
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requestCountVariable.value -= 1
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lock.unlock()
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}
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}
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public extension Observable {
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/// Increase and descrease NetworkService request counter on subscribe and dispose
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/// (used to show / hide activity indicator)
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///
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/// - Parameter networkService: NetworkService to operate on it
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/// - Returns: The source sequence with the side-effecting behavior applied.
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func counterTracking(for networkService: NetworkService) -> Observable<Observable.E> {
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return `do`(onSubscribe: {
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networkService.increaseRequestCounter()
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}, onDispose: {
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networkService.decreaseRequestCounter()
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})
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}
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}
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