Started working on modern policies (from Epiphany)

UI finished, just need to hook it up to the backend.

App/Backend/ResourcePolicyManager.swift

@@ -10,7 +10,7 @@ import Foundation
 class ResourcePolicyManager: NSObject, SBRResourceOriginPolicyDataSource
 {
     static let AllowedOriginsDefaultsKey = "allowedOrigins"
-    static let EnabledOriginsDefaultsKey = "enabledOrigins"
+    static let OriginPoliciesDefaultsKey = "originPolicies"
     
     private static func stringSetForKey(_ key: String) -> Set<String> {
         if let set = UserDefaults.standard.array(forKey: key) as? [String] {
@@ -30,6 +30,19 @@ class ResourcePolicyManager: NSObject, SBRResourceOriginPolicyDataSource
     
     func allowedOriginsForScriptResources() -> Set<String> { allowedOriginSet }
     
+    private lazy var scriptPolicies: Dictionary<String, ScriptPolicy.PolicyType> = {
+        if let existingDict = UserDefaults.standard.dictionary(forKey: Self.OriginPoliciesDefaultsKey) as? Dictionary<String, Int> {
+            return existingDict.mapValues { ScriptPolicy.PolicyType(rawValue: $0)! }
+        }
+        
+        return Dictionary<String, ScriptPolicy.PolicyType>()
+    }() {
+        didSet {
+            let encodableDictionary = scriptPolicies.mapValues { $0.rawValue }
+            UserDefaults.standard.set(encodableDictionary, forKey: Self.OriginPoliciesDefaultsKey)
+        }
+    }
+    
     func allowOriginToLoadScriptResources(_ origin: String) {
         allowedOriginSet.formUnion([ origin ])
     }
@@ -37,4 +50,16 @@ class ResourcePolicyManager: NSObject, SBRResourceOriginPolicyDataSource
     func disallowOriginToLoadScriptResources(_ origin: String) {
         allowedOriginSet.remove(origin)
     }
+    
+    func scriptPolicy(forOrigin origin: String) -> ScriptPolicy {
+        if let policyType = scriptPolicies[origin] {
+            return ScriptPolicy(policyType: policyType, securityOrigin: origin)
+        }
+        
+        return ScriptPolicy(policyType: .alpha, securityOrigin: origin)
+    }
+    
+    func setScriptPolicyType(_ policyType: ScriptPolicy.PolicyType, forOrigin origin: String) {
+        scriptPolicies[origin] = policyType
+    }
 }