Dactyloidae iOS initial commit

mobile/ios/Shared/SupportUtils.swift

@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import Foundation
+
+/// Utility functions related to SUMO.
+public struct SupportUtils {
+    /// Construct a NSURL pointing to a specific topic on SUMO. The topic should be a non-escaped string. It will
+    /// be properly escaped by this function.
+    ///
+    /// The resulting NSURL will include the app version, operating system and locale code. For example, a topic
+    /// "cheese" will be turned into a link that looks like https://support.mozilla.org/1/mobile/2.0/iOS/en-US/cheese
+    public static func URLForTopic(_ topic: String) -> URL? {
+        guard let escapedTopic = topic.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlPathAllowed),
+                let languageIdentifier = Locale.preferredLanguages.first else {
+            return nil
+        }
+        return URL(string: "https://support.mozilla.org/1/mobile/\(AppInfo.appVersion)/iOS/\(languageIdentifier)/\(escapedTopic)")
+    }
+}