Add logic for more customizable password generator

passKit/Passwords/PasswordGeneratorFlavor.swift

@@ -0,0 +1,38 @@
+//
+//  PasswordGeneratorFlavor.swift
+//  passKit
+//
+//  Created by Danny Moesch on 28.11.18.
+//  Copyright © 2018 Bob Sun. All rights reserved.
+//
+
+public typealias LengthLimits = (min: Int, max: Int)
+
+public enum PasswordGeneratorFlavor: String {
+    case random = "Random"
+    case xkcd = "XKCD"
+
+    public var localized: String {
+        return rawValue.localize()
+    }
+
+    public var longNameLocalized: String {
+        switch self {
+        case .random:
+            return "RandomString".localize()
+        case .xkcd:
+            return "XKCDStyle".localize()
+        }
+    }
+
+    public var lengthLimits: LengthLimits {
+        switch self {
+        case .random:
+            return (4, 64)
+        case .xkcd:
+            return (2, 5)
+        }
+    }
+}
+
+extension PasswordGeneratorFlavor: CaseIterable {}