Add ComposableKeychain

.gitignore

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+.DS_Store
+/.build
+/Packages
+/*.xcodeproj
+xcuserdata/
+DerivedData/
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata

Package.resolved

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+{
+  "object": {
+    "pins": [
+      {
+        "package": "combine-schedulers",
+        "repositoryURL": "https://github.com/pointfreeco/combine-schedulers",
+        "state": {
+          "branch": null,
+          "revision": "4cf088c29a20f52be0f2ca54992b492c54e0076b",
+          "version": "0.5.3"
+        }
+      },
+      {
+        "package": "KeychainAccess",
+        "repositoryURL": "https://github.com/kishikawakatsumi/KeychainAccess",
+        "state": {
+          "branch": null,
+          "revision": "84e546727d66f1adc5439debad16270d0fdd04e7",
+          "version": "4.2.2"
+        }
+      },
+      {
+        "package": "swift-case-paths",
+        "repositoryURL": "https://github.com/pointfreeco/swift-case-paths",
+        "state": {
+          "branch": null,
+          "revision": "241301b67d8551c26d8f09bd2c0e52cc49f18007",
+          "version": "0.8.0"
+        }
+      },
+      {
+        "package": "swift-collections",
+        "repositoryURL": "https://github.com/apple/swift-collections",
+        "state": {
+          "branch": null,
+          "revision": "48254824bb4248676bf7ce56014ff57b142b77eb",
+          "version": "1.0.2"
+        }
+      },
+      {
+        "package": "swift-composable-architecture",
+        "repositoryURL": "https://github.com/pointfreeco/swift-composable-architecture",
+        "state": {
+          "branch": null,
+          "revision": "ba9c626ab1b2b6af8cf684eebb2ab472fa5b6753",
+          "version": "0.33.1"
+        }
+      },
+      {
+        "package": "swift-custom-dump",
+        "repositoryURL": "https://github.com/pointfreeco/swift-custom-dump",
+        "state": {
+          "branch": null,
+          "revision": "51698ece74ecf31959d3fa81733f0a5363ef1b4e",
+          "version": "0.3.0"
+        }
+      },
+      {
+        "package": "swift-identified-collections",
+        "repositoryURL": "https://github.com/pointfreeco/swift-identified-collections",
+        "state": {
+          "branch": null,
+          "revision": "680bf440178a78a627b1c2c64c0855f6523ad5b9",
+          "version": "0.3.2"
+        }
+      },
+      {
+        "package": "xctest-dynamic-overlay",
+        "repositoryURL": "https://github.com/pointfreeco/xctest-dynamic-overlay",
+        "state": {
+          "branch": null,
+          "revision": "50a70a9d3583fe228ce672e8923010c8df2deddd",
+          "version": "0.2.1"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

Package.swift

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+// swift-tools-version:5.5
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+  name: "ComposableKeychain",
+  platforms: [
+    .iOS(.v13),
+    .macOS(.v10_15),
+    .tvOS(.v13),
+    .watchOS(.v6),
+  ],
+  products: [
+    .library(
+      name: "ComposableKeychain",
+      targets: ["ComposableKeychain"])
+  ],
+  dependencies: [
+    .package(url: "https://github.com/kishikawakatsumi/KeychainAccess", from: "4.2.2"),
+    .package(url: "https://github.com/pointfreeco/swift-composable-architecture", from: "0.33.0"),
+  ],
+  targets: [
+    .target(
+      name: "ComposableKeychain",
+      dependencies: [
+        "KeychainAccess",
+        .product(name: "ComposableArchitecture", package: "swift-composable-architecture"),
+      ]),
+    .testTarget(
+      name: "ComposableKeychainTests",
+      dependencies: ["ComposableKeychain"]),
+  ]
+)

README.md

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+# ComposableKeychain
+
+A description of this package.

Sources/ComposableKeychain/Interface.swift

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+import Foundation
+
+public struct KeychainClient {
+  public var getString: (_ key: String) throws -> String?
+  public var getData: (_ key: String) throws -> Data?
+  public var setString: (_ value: String, _ key: String) throws -> Void
+  public var setData: (_ value: Data, _ key: String) throws -> Void
+  public var remove: (_ key: String) throws -> Void
+  public var removeAll: () throws -> Void
+  public var contains: (_ key: String) throws -> Bool
+
+  public init(
+    getString: @escaping (_ key: String) throws -> String?,
+    getData: @escaping (_ key: String) throws -> Data?,
+    setString: @escaping (_ value: String, _ key: String) throws -> Void,
+    setData: @escaping (_ value: Data, _ key: String) throws -> Void,
+    remove: @escaping (_ key: String) throws -> Void,
+    removeAll: @escaping () throws -> Void,
+    contains: @escaping (_ key: String) throws -> Bool
+  ) {
+    self.getString = getString
+    self.getData = getData
+    self.setString = setString
+    self.setData = setData
+    self.remove = remove
+    self.removeAll = removeAll
+    self.contains = contains
+  }
+}

Sources/ComposableKeychain/Live.swift

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+import KeychainAccess
+
+extension KeychainClient {
+
+  public static func live(keychain: Keychain) -> KeychainClient {
+    return KeychainClient(
+      getString: { try keychain.get($0) },
+      getData: { try keychain.getData($0) },
+      setString: { try keychain.set($0, key: $1) },
+      setData: { try keychain.set($0, key: $1) },
+      remove: { try keychain.remove($0) },
+      removeAll: { try keychain.removeAll() },
+      contains: { try keychain.contains($0) }
+    )
+  }
+}

Sources/ComposableKeychain/Mocks.swift

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+extension KeychainClient {
+  public static let noop = KeychainClient(
+    getString: { _ in nil },
+    getData: { _ in nil },
+    setString: { _, _ in },
+    setData: { _, _ in },
+    remove: { _ in },
+    removeAll: {},
+    contains: { _ in false }
+  )
+}
+
+#if DEBUG
+  import XCTestDynamicOverlay
+
+  extension KeychainClient {
+    public static let failing = KeychainClient(
+      getString: { key in
+        XCTFail("\(Self.self).getString(\(key)) is unimplemented")
+        return nil
+      },
+      getData: { key in
+        XCTFail("\(Self.self).getData(\(key)) is unimplemented")
+        return nil
+      },
+      setString: { _, key in
+        XCTFail("\(Self.self).setString(_,\(key)) is unimplemented")
+      },
+      setData: { _, key in
+        XCTFail("\(Self.self).setData(_,\(key)) is unimplemented")
+      },
+      remove: { key in
+        XCTFail("\(Self.self).remove(\(key)) is unimplemented")
+      },
+      removeAll: {
+        XCTFail("\(Self.self).removeAll() is unimplemented")
+      },
+      contains: { key in
+        XCTFail("\(Self.self).contains(\(key)) is unimplemented")
+        return false
+      }
+    )
+  }
+#endif

Tests/ComposableKeychainTests/ComposableKeychainTests.swift

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+import XCTest
+
+@testable import ComposableKeychain
+
+final class ComposableKeychainTests: XCTestCase {
+  func testExample() throws {
+  }
+}