Language support

MapKitGoogleStyler/Classes/MapKit+GoogleStyle.swift

@@ -14,18 +14,21 @@ public enum MapKitGoogleStylerError: Error {
 }
 
 public struct MapKitGoogleStyler {
-    public static func buildOverlay(with jsonArray: [[String: Any]]) -> MKTileOverlay {
-        let mapStyle = MapStyle(json: jsonArray)
+    public static func buildOverlay(with jsonArray: [[String: Any]], langCode: String? = nil) -> MKTileOverlay {
+        var mapStyle = MapStyle(json: jsonArray)
+        if let langCodeSet = langCode {
+            mapStyle.langCode = langCodeSet   
+        }
         let overlay = MKTileOverlay(urlTemplate: mapStyle.urlString)
         overlay.canReplaceMapContent = true
         return overlay
     }
 
-    public static func buildOverlay(with jsonFileURL: URL) throws -> MKTileOverlay {
+    public static func buildOverlay(with jsonFileURL: URL, langCode: String? = nil) throws -> MKTileOverlay {
         let data = try Data(contentsOf: jsonFileURL)
         let object = try JSONSerialization.jsonObject(with: data, options: .allowFragments)
         if let array = object as? [[String: Any]] {
-            return MapKitGoogleStyler.buildOverlay(with: array)
+            return MapKitGoogleStyler.buildOverlay(with: array, langCode: langCode)
         } else {
             throw MapKitGoogleStylerError.invalidJSONFormat
         }

MapKitGoogleStyler/Classes/MapStyle.swift

@@ -10,7 +10,8 @@ import Foundation
 
 internal struct MapStyle {
 
-    private let baseURL = "https://mts0.google.com/vt/lyrs=m@289000001&hl=en&src=app&x={x}&y={y}&z={z}&s=DGal"
+    var langCode = "en"
+    private let baseURL = "https://mts0.google.com/vt/lyrs=m@289000001&hl={lang}&src=app&x={x}&y={y}&z={z}&s=DGal"
     private let prefix = "&apistyle="
 
     internal var googleStyles = [GoogleStyle]()
@@ -30,12 +31,15 @@ internal struct MapStyle {
                 }
             }
         }
+
         url = url.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? ""
 
         url = url
             .replacingOccurrences(of: ":", with: "%3A")
             .replacingOccurrences(of: ",", with: "%2C")
 
-        return "\(baseURL)\(url)"
+        var urlPrefix = baseURL.replacingOccurrences(of: "{lang}", with: langCode)
+
+        return "\(urlPrefix)\(url)"
     }
 }