Initial commit

Able to actually block scripts using a plugin, have XPC set up between plugin and
host process. Limited UI support

SBrowser/Backend/ResourcePolicyManager.swift

@@ -0,0 +1,31 @@
+//
+//  ResourcePolicyManager.swift
+//  SBrowser
+//
+//  Created by James Magahern on 7/22/20.
+//
+
+import Foundation
+
+class ResourcePolicyManager: NSObject, SBRResourceOriginPolicyDataSource
+{
+    static let AllowedOriginsDefaultsKey = "allowedOrigins"
+    private var allowedOriginSet: Set<String> = {
+        if let allowedOrigins = UserDefaults.standard.array(forKey: AllowedOriginsDefaultsKey) as? [String] {
+            return Set<String>(allowedOrigins)
+        }
+
+        return Set<String>()
+    }()
+    
+    func allowedOriginsForScriptResources() -> Set<String>
+    {
+        allowedOriginSet
+    }
+    
+    func allowOriginToLoadScriptResources(_ origin: String)
+    {
+        allowedOriginSet.formUnion([ origin ])
+        UserDefaults.standard.set(allowedOriginSet, forKey: Self.AllowedOriginsDefaultsKey)
+    }
+}