Tabs implementation

Favicons and stuff too

SBrowser/Tabs/TabController.swift

@@ -0,0 +1,40 @@
+//
+//  TabController.swift
+//  SBrowser
+//
+//  Created by James Magahern on 7/30/20.
+//
+
+import Foundation
+
+class TabController
+{
+    var tabs: [Tab] = []
+    var policyManager = ResourcePolicyManager()
+    
+    init() {
+        // TODO: load tabs from disk.
+        _ = createNewTab()
+    }
+    
+    func tab(forURL url: URL) -> Tab? {
+        tabs.first { $0.url == url }
+    }
+    
+    func tab(forIdentifier identifier: UUID) -> Tab? {
+        tabs.first { $0.identifier == identifier }
+    }
+    
+    func createNewTab() -> Tab {
+        let tab = Tab(urlString: "about:blank", policyManager: policyManager)
+        tabs.append(tab)
+        
+        return tab
+    }
+    
+    func closeTab(_ tab: Tab) {
+        if let index = tabs.firstIndex(of: tab) {
+            tabs.remove(at: index)
+        }
+    }
+}