Merge pull request #17 from winebarrel/Add_vault

Add Vault

Pulse/Vault.swift

@@ -0,0 +1,32 @@
+import Foundation
+import Valet
+
+enum Vault {
+    static let shared = Valet.valet(with: Identifier(nonEmpty: Bundle.main.bundleIdentifier)!, accessibility: .whenUnlocked)
+
+    static var githubToken: String {
+        get {
+            do {
+                return try shared.string(forKey: "githubToken")
+            } catch KeychainError.itemNotFound {
+                // Nothing to do
+            } catch {
+                Logger.shared.error("failed to get githubToken from Valet: \(error)")
+            }
+
+            return ""
+        }
+
+        set(token) {
+            do {
+                if token.isEmpty {
+                    try shared.removeObject(forKey: "githubToken")
+                } else {
+                    try shared.setString(token, forKey: "githubToken")
+                }
+            } catch {
+                Logger.shared.error("failed to set githubToken to Valet: \(error)")
+            }
+        }
+    }
+}