52 lines
1.7 KiB
Swift
52 lines
1.7 KiB
Swift
import Foundation
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/**
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Provided for relative-path coding. See the instructions in our
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[README](https://github.com/mxcl/Path.swift/#codable).
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*/
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public extension CodingUserInfoKey {
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/**
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If set on an `Encoder`’s `userInfo` all paths are encoded relative to this path.
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For example:
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let encoder = JSONEncoder()
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encoder.userInfo[.relativePath] = Path.home
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encoder.encode([Path.home, Path.home/"foo"])
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- Remark: See the [README](https://github.com/mxcl/Path.swift/#codable) for more information.
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*/
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static let relativePath = CodingUserInfoKey(rawValue: "dev.mxcl.Path.relative")!
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}
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/**
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Provided for relative-path coding. See the instructions in our
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[README](https://github.com/mxcl/Path.swift/#codable).
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*/
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extension Path: Codable {
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/// - SeeAlso: `CodingUserInfoKey.relativePath`
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// :nodoc:
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public init(from decoder: Decoder) throws {
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let value = try decoder.singleValueContainer().decode(String.self)
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if value.hasPrefix("/") {
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string = value
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} else {
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guard let root = decoder.userInfo[.relativePath] as? Path else {
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throw DecodingError.dataCorrupted(.init(codingPath: [], debugDescription: "Path cannot decode a relative path if `userInfo[.relativePath]` not set to a Path object."))
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}
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string = (root/value).string
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}
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}
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/// - SeeAlso: `CodingUserInfoKey.relativePath`
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// :nodoc:
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public func encode(to encoder: Encoder) throws {
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var container = encoder.singleValueContainer()
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if let root = encoder.userInfo[.relativePath] as? Path {
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try container.encode(relative(to: root))
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} else {
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try container.encode(string)
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}
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}
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}
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