Introduce DialpadConfiguration

Riot/Modules/Call/Dialpad/DialpadConfiguration.swift

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+// 
+// Copyright 2020 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+/// Dial pad configuration object, to be passed when initializing a `DialpadViewController`.
+@objcMembers
+class DialpadConfiguration: NSObject {
+    
+    /// Option for a dial pad to show the backspace button or not.
+    var showsBackspaceButton: Bool
+    
+    /// Option for a dial pad to show the call button or not.
+    var showsCallButton: Bool
+    
+    /// Option for a dial pad to enable number formatting when typing or not.
+    var formattingEnabled: Bool
+    
+    /// Option for a dial pad to enable editing on typed text or not.
+    var editingEnabled: Bool
+    
+    /// Default configuration object. All options are enabled by default.
+    static let `default`: DialpadConfiguration = DialpadConfiguration()
+    
+    init(showsBackspaceButton: Bool = true,
+         showsCallButton: Bool = true,
+         formattingEnabled: Bool = true,
+         editingEnabled: Bool = true) {
+        self.showsBackspaceButton = showsBackspaceButton
+        self.showsCallButton = showsCallButton
+        self.formattingEnabled = formattingEnabled
+        self.editingEnabled = editingEnabled
+        super.init()
+    }
+    
+}