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