101 lines
3.6 KiB
Swift
101 lines
3.6 KiB
Swift
//
|
|
// 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
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// 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
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
//
|
|
|
|
import RxSwift
|
|
import RxCocoa
|
|
|
|
open class RxNetworkOperationModel<LoadingStateType: NetworkOperationState>: NetworkOperationModel
|
|
where LoadingStateType.DataSourceType: RxDataSource {
|
|
|
|
public typealias DataSourceType = LoadingStateType.DataSourceType
|
|
public typealias ResultType = DataSourceType.ResultType
|
|
|
|
public typealias ErrorHandler = (Error, LoadingStateType) -> LoadingStateType
|
|
|
|
private let stateRelay = BehaviorRelay<LoadingStateType>(value: .initialState)
|
|
var currentRequestDisposable: Disposable?
|
|
|
|
private(set) var dataSource: DataSourceType
|
|
|
|
private let errorHandler: ErrorHandler
|
|
|
|
open var stateDriver: Driver<LoadingStateType> {
|
|
stateRelay.asDriver()
|
|
}
|
|
|
|
/// Model initializer with data source and custom error handler.
|
|
///
|
|
/// - Parameters:
|
|
/// - dataSource: Data source for network operation.
|
|
/// - customErrorHandler: Custom error handler for state update. Pass nil for default error handling.
|
|
public init(dataSource: DataSourceType, customErrorHandler: ErrorHandler? = nil) {
|
|
self.errorHandler = customErrorHandler ?? { .errorState(error: $0, after: $1) }
|
|
self.dataSource = dataSource
|
|
}
|
|
|
|
/// Performs request to given data source
|
|
public func execute() {
|
|
currentRequestDisposable?.dispose()
|
|
|
|
state = .initialLoadingState(after: state)
|
|
|
|
requestResult(from: dataSource)
|
|
}
|
|
|
|
/// Replaces current data source with new one.
|
|
///
|
|
/// - Parameter newDataSource: A new data source to use.
|
|
public func replaceDataSource(with newDataSource: DataSourceType) {
|
|
dataSource = newDataSource
|
|
}
|
|
|
|
func onGot(error: Error) {
|
|
state = errorHandler(error, state)
|
|
}
|
|
|
|
func onGot(result: ResultType, from dataSource: DataSourceType) {
|
|
state = .resultState(result: result,
|
|
from: dataSource,
|
|
after: state)
|
|
}
|
|
|
|
func requestResult(from dataSource: DataSourceType) {
|
|
currentRequestDisposable = dataSource
|
|
.resultSingle()
|
|
.observe(on: MainScheduler.instance)
|
|
.subscribe(onSuccess: { [weak self] result in
|
|
self?.onGot(result: result, from: dataSource)
|
|
}, onFailure: { [weak self] error in
|
|
self?.onGot(error: error)
|
|
})
|
|
}
|
|
|
|
var state: LoadingStateType {
|
|
get {
|
|
stateRelay.value
|
|
}
|
|
set {
|
|
stateRelay.accept(newValue)
|
|
}
|
|
}
|
|
}
|