66 lines
2.5 KiB
Swift
66 lines
2.5 KiB
Swift
//
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// Copyright (c) 2018 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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open class RxDataLoadingModel<LoadingStateType: DataLoadingState>: RxNetworkOperationModel<LoadingStateType>
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where LoadingStateType.DataSourceType: RxDataSource {
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public typealias EmptyResultChecker = (ResultType) -> Bool
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let emptyResultChecker: EmptyResultChecker
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/// Model initializer with data source, empty result checker and custom error handler.
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///
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/// - Parameters:
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/// - dataSource: Data source for data loading.
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/// - customErrorHandler: Custom error handler for state update. Pass nil for default error handling.
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/// - emptyResultChecker: Empty result checker closure.
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public init(dataSource: DataSourceType,
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customErrorHandler: ErrorHandler? = nil,
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emptyResultChecker: @escaping EmptyResultChecker) {
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self.emptyResultChecker = emptyResultChecker
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super.init(dataSource: dataSource, customErrorHandler: customErrorHandler)
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}
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open func reload() {
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execute()
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}
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override func onGot(result: ResultType, from dataSource: DataSourceType) {
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if emptyResultChecker(result) {
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state = .emptyState
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} else {
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super.onGot(result: result, from: dataSource)
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}
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updateStateAfterResult(from: dataSource)
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}
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func updateStateAfterResult(from dataSource: DataSourceType) {
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// override in subcass if needed
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}
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}
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