123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123 |
- import Foundation
- public enum Source {
-
- public enum Identifier {
-
- public typealias Value = UInt
- static var current: Value = 0
- static func next() -> Value {
- current += 1
- return current
- }
- }
-
-
-
- case network(Resource)
-
-
-
- case provider(ImageDataProvider)
-
-
- public var cacheKey: String {
- switch self {
- case .network(let resource): return resource.cacheKey
- case .provider(let provider): return provider.cacheKey
- }
- }
-
-
-
-
- public var url: URL? {
- switch self {
- case .network(let resource): return resource.downloadURL
- case .provider(let provider): return provider.contentURL
- }
- }
- }
- extension Source: Hashable {
- public static func == (lhs: Source, rhs: Source) -> Bool {
- switch (lhs, rhs) {
- case (.network(let r1), .network(let r2)):
- return r1.cacheKey == r2.cacheKey && r1.downloadURL == r2.downloadURL
- case (.provider(let p1), .provider(let p2)):
- return p1.cacheKey == p2.cacheKey && p1.contentURL == p2.contentURL
- case (.provider(_), .network(_)):
- return false
- case (.network(_), .provider(_)):
- return false
- }
- }
- public func hash(into hasher: inout Hasher) {
- switch self {
- case .network(let r):
- hasher.combine(r.cacheKey)
- hasher.combine(r.downloadURL)
- case .provider(let p):
- hasher.combine(p.cacheKey)
- hasher.combine(p.contentURL)
- }
- }
- }
- extension Source {
- var asResource: Resource? {
- guard case .network(let resource) = self else {
- return nil
- }
- return resource
- }
- var asProvider: ImageDataProvider? {
- guard case .provider(let provider) = self else {
- return nil
- }
- return provider
- }
- }
|