96 lines
3.1 KiB
Swift
96 lines
3.1 KiB
Swift
//
|
|
// Copyright (c) 2017 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
|
|
|
|
/// Single load cursor configuration for single load operation
|
|
public final class SingleLoadCursorConfiguration<Element>: TotalCountCursorConfiguration {
|
|
|
|
public typealias ResultType = [Element]
|
|
|
|
private let loadingSingle: Single<ResultType>
|
|
|
|
/// Initializer for Single with array result type.
|
|
///
|
|
/// - Parameter loadingSingle: Single that will emit array of result type.
|
|
public init(loadingSingle: Single<ResultType>) {
|
|
self.loadingSingle = loadingSingle
|
|
}
|
|
|
|
public func resultSingle() -> Single<ResultType> {
|
|
return loadingSingle
|
|
}
|
|
|
|
public init(resetFrom other: SingleLoadCursorConfiguration) {
|
|
self.loadingSingle = other.loadingSingle
|
|
}
|
|
|
|
}
|
|
|
|
/// Cursor implementation for single load operation
|
|
@available(*, deprecated, message: "Use SingleLoadCursorConfiguration with TotalCountCursor.")
|
|
public class SingleLoadCursor<Element>: ResettableCursorType {
|
|
|
|
private let loadingObservable: Single<[Element]>
|
|
|
|
private var content: [Element] = []
|
|
|
|
/// Initializer for array content type
|
|
///
|
|
/// - Parameter loadingObservable: Single observable with element of [Element] type
|
|
public init(loadingObservable: Single<[Element]>) {
|
|
self.loadingObservable = loadingObservable
|
|
}
|
|
|
|
public required init(resetFrom other: SingleLoadCursor) {
|
|
self.loadingObservable = other.loadingObservable
|
|
}
|
|
|
|
public private(set) var exhausted = false
|
|
|
|
public var count: Int {
|
|
return content.count
|
|
}
|
|
|
|
public subscript(index: Int) -> Element {
|
|
return content[index]
|
|
}
|
|
|
|
public func loadNextBatch() -> Single<[Element]> {
|
|
return Single.deferred {
|
|
if self.exhausted {
|
|
return .error(CursorError.exhausted)
|
|
}
|
|
|
|
return self.loadingObservable.do(onSuccess: { [weak self] newItems in
|
|
self?.onGot(result: newItems)
|
|
})
|
|
}
|
|
}
|
|
|
|
private func onGot(result: [Element]) {
|
|
content = result
|
|
exhausted = true
|
|
}
|
|
|
|
}
|