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/*
This source file is part of the Swift.org open source project
Copyright (c) 2021-2023 Apple Inc. and the Swift project authors
Licensed under Apache License v2.0 with Runtime Library Exception
See https://swift.org/LICENSE.txt for license information
See https://swift.org/CONTRIBUTORS.txt for Swift project authors
*/
/// A RenderReference value that can be diffed.
///
/// An `AnyRenderReference` value forwards difference operations to the underlying base type, which implement the difference differently.
struct AnyRenderReference: Encodable, Equatable, RenderJSONDiffable {
var value: RenderReference & Codable
init(_ value: RenderReference & Codable) {
self.value = value
}
func encode(to encoder: Encoder) throws {
try value.encode(to: encoder)
}
/// Forwards the difference methods on to the correct concrete type.
func difference(from other: AnyRenderReference, at path: CodablePath) -> JSONPatchDifferences {
switch (self.value.type, other.value.type) {
// MARK: References
case (.file, .file):
return (value as! FileReference).difference(from: (other.value as! FileReference), at: path)
case (.fileType, .fileType):
return (value as! FileTypeReference).difference(from: (other.value as! FileTypeReference), at: path)
case (.image, .image):
return (value as! ImageReference).difference(from: (other.value as! ImageReference), at: path)
case (.link, .link):
return (value as! LinkReference).difference(from: (other.value as! LinkReference), at: path)
case (.section, .section), (.topic, .topic):
return (value as! TopicRenderReference).difference(from: (other.value as! TopicRenderReference), at: path)
case (.unresolvable, .unresolvable):
return (value as! UnresolvedRenderReference).difference(from: (other.value as! UnresolvedRenderReference), at: path)
case (.video, .video):
return (value as! VideoReference).difference(from: (other.value as! VideoReference), at: path)
// MARK: Tutorial References
case (.download, .download):
return (value as! DownloadReference).difference(from: (other.value as! DownloadReference), at: path)
case (.xcodeRequirement, .xcodeRequirement):
return (value as! XcodeRequirementReference).difference(from: (other.value as! XcodeRequirementReference), at: path)
default:
assertionFailure("Case diffing \(value) with \(other.value) is not implemented.")
return []
}
}
static func == (lhs: AnyRenderReference, rhs: AnyRenderReference) -> Bool {
switch (lhs.value.type, rhs.value.type) {
// MARK: References
case (.file, .file):
return (lhs.value as! FileReference) == (rhs.value as! FileReference)
case (.fileType, .fileType):
return (lhs.value as! FileTypeReference) == (rhs.value as! FileTypeReference)
case (.image, .image):
return (lhs.value as! ImageReference) == (rhs.value as! ImageReference)
case (.link, .link):
return (lhs.value as! LinkReference) == (rhs.value as! LinkReference)
case (.section, .section), (.topic, .topic):
return (lhs.value as! TopicRenderReference) == (rhs.value as! TopicRenderReference)
case (.unresolvable, .unresolvable):
return (lhs.value as! UnresolvedRenderReference) == (rhs.value as! UnresolvedRenderReference)
case (.video, .video):
return (lhs.value as! VideoReference) == (rhs.value as! VideoReference)
// MARK: Tutorial References
case (.download, .download):
return (lhs.value as! DownloadReference) == (rhs.value as! DownloadReference)
case (.xcodeRequirement, .xcodeRequirement):
return (lhs.value as! XcodeRequirementReference) == (rhs.value as! XcodeRequirementReference)
default:
assertionFailure("Case diffing \(lhs.value) with \(rhs.value) is not implemented.")
return false
}
}
func isSimilar(to other: AnyRenderReference) -> Bool {
return self.value.identifier == other.value.identifier
}
}
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