Split out libraries into SPM packages (#298)

Sources/Secretive/Preview Content/PreviewStore.swift

@@ -0,0 +1,74 @@
+import Foundation
+import SecretKit
+
+enum Preview {}
+
+extension Preview {
+
+    struct Secret: SecretKit.Secret {
+
+        let id = UUID().uuidString
+        let name: String
+        let algorithm = Algorithm.ellipticCurve
+        let keySize = 256
+        let publicKey = UUID().uuidString.data(using: .utf8)!
+
+    }
+
+}
+
+extension Preview {
+
+    class Store: SecretStore, ObservableObject {
+
+        let isAvailable = true
+        let id = UUID()
+        var name: String { "Preview Store" }
+        @Published var secrets: [Secret] = []
+
+        init(secrets: [Secret]) {
+            self.secrets.append(contentsOf: secrets)
+        }
+
+        init(numberOfRandomSecrets: Int = 5) {
+            let new = (0..<numberOfRandomSecrets).map { Secret(name: String(describing: $0)) }
+            self.secrets.append(contentsOf: new)
+        }
+
+        func sign(data: Data, with secret: Preview.Secret, for provenance: SigningRequestProvenance) throws -> SignedData {
+            return SignedData(data: data, requiredAuthentication: false)
+        }
+
+        func persistAuthentication(secret: Preview.Secret, forDuration duration: TimeInterval) throws {
+        }
+
+    }
+
+    class StoreModifiable: Store, SecretStoreModifiable {
+        override var name: String { "Modifiable Preview Store" }
+
+        func create(name: String, requiresAuthentication: Bool) throws {
+        }
+
+        func delete(secret: Preview.Secret) throws {
+        }
+
+        func update(secret: Preview.Secret, name: String) throws {
+        }
+    }
+}
+
+extension Preview {
+
+    static func storeList(stores: [Store] = [], modifiableStores: [StoreModifiable] = []) -> SecretStoreList {
+        let list = SecretStoreList()
+        for store in stores {
+            list.add(store: store)
+        }
+        for storeModifiable in modifiableStores {
+            list.add(store: storeModifiable)
+        }
+        return list
+    }
+
+}