Merge pull request #4 from BaseflowIT/feature/ios_check_permissions

Added feature to check permissions on iOS

example/ios/Flutter/Debug.xcconfig

 #include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"
+
+FLUTTER_BUILD_MODE=debug

example/ios/Runner.xcodeproj/project.pbxproj

@@ -15,8 +15,6 @@
 		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
 		9705A1C61CF904A100538489 /* Flutter.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9740EEBA1CF902C7004384FC /* Flutter.framework */; };
 		9705A1C71CF904A300538489 /* Flutter.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 9740EEBA1CF902C7004384FC /* Flutter.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
-		9740EEB41CF90195004384FC /* Debug.xcconfig in Resources */ = {isa = PBXBuildFile; fileRef = 9740EEB21CF90195004384FC /* Debug.xcconfig */; };
-		9740EEB51CF90195004384FC /* Generated.xcconfig in Resources */ = {isa = PBXBuildFile; fileRef = 9740EEB31CF90195004384FC /* Generated.xcconfig */; };
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
@@ -174,7 +172,7 @@
 		97C146E61CF9000F007C117D /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0910;
+				LastUpgradeCheck = 0940;
 				ORGANIZATIONNAME = "The Chromium Authors";
 				TargetAttributes = {
 					97C146ED1CF9000F007C117D = {
@@ -207,9 +205,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */,
-				9740EEB51CF90195004384FC /* Generated.xcconfig in Resources */,
 				3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */,
-				9740EEB41CF90195004384FC /* Debug.xcconfig in Resources */,
 				97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */,
 				2D5378261FAA1A9400D5DBA9 /* flutter_assets in Resources */,
 				97C146FC1CF9000F007C117D /* Main.storyboard in Resources */,
@@ -226,7 +222,7 @@
 			);
 			inputPaths = (
 				"${SRCROOT}/Pods/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
-				"${PODS_ROOT}/../.symlinks/flutter/ios-release/Flutter.framework",
+				"${PODS_ROOT}/../.symlinks/flutter/ios/Flutter.framework",
 				"${BUILT_PRODUCTS_DIR}/permission_handler/permission_handler.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
@@ -333,12 +329,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -387,12 +385,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;

example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0910"
+   LastUpgradeVersion = "0940"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,7 +26,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
       </Testables>
@@ -46,7 +45,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"

example/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

example/ios/Runner/Info.plist

@@ -2,6 +2,10 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>arm64</string>
+	</array>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
 	<key>CFBundleExecutable</key>
@@ -41,5 +45,29 @@
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
+	<key>NSLocationWhenInUseUsageDescription</key>
+	<string>Can I haz location?</string>
+	<key>NSAppleMusicUsageDescription</key>
+	<string>Music!</string>
+	<key>NSBluetoothPeripheralUsageDescription</key>
+	<string>bluetooth</string>
+	<key>NSCalendarsUsageDescription</key>
+	<string>Calendars</string>
+	<key>NSCameraUsageDescription</key>
+	<string>camera</string>
+	<key>NSContactsUsageDescription</key>
+	<string>contacts</string>
+	<key>kTCCServiceMediaLibrary</key>
+	<string>media</string>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>microphone</string>
+	<key>NSMotionUsageDescription</key>
+	<string>motion</string>
+	<key>NSPhotoLibraryUsageDescription</key>
+	<string>photos</string>
+	<key>NSRemindersUsageDescription</key>
+	<string>reminders</string>
+	<key>NSSpeechRecognitionUsageDescription</key>
+	<string>speech</string>
 </dict>
 </plist>

example/lib/main.dart

@@ -30,6 +30,7 @@ class _MyAppState extends State<MyApp> {
       permissionStatus = await PermissionHandler
           .checkPermissionStatus(PermissionGroup.calendar);
 
+/*
       if (permissionStatus != PermissionStatus.granted) {
         final bool shouldShowRationale = await PermissionHandler
             .shouldShowRequestPermissionRationale(PermissionGroup.calendar);
@@ -38,11 +39,13 @@ class _MyAppState extends State<MyApp> {
           final Map<PermissionGroup, PermissionStatus> permissions =
               await PermissionHandler.requestPermissions(
                   <PermissionGroup>[PermissionGroup.calendar]);
+
           if (permissions.containsKey(PermissionGroup.calendar)) {
             permissionStatus = permissions[PermissionGroup.calendar];
           }
         }
       }
+*/
     } on PlatformException {
       permissionStatus = PermissionStatus.unknown;
     }

ios/Classes/PermissionManager.swift

+//
+//  PermissionManager.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import Foundation
+
+class PermissionManager: NSObject {
+    
+    static func checkPermissionStatus(permission: PermissionGroup, result: @escaping FlutterResult) {
+        let permissionStrategy = PermissionManager.createPermissionStrategy(permission: permission)
+        let permissionStatus = permissionStrategy.checkPermissionStatus(permission: permission)
+        
+        result(Codec.encodePermissionStatus(permissionStatus: permissionStatus))
+    }
+    
+    private static func createPermissionStrategy(permission: PermissionGroup) -> PermissionStrategy {
+        switch permission {
+        case PermissionGroup.calendar:
+            return EventPermissionStrategy()
+        case PermissionGroup.camera:
+            return AudioVideoPermissionStrategy()
+        case PermissionGroup.contacts:
+            return ContactPermissionStrategy()
+        case PermissionGroup.location,
+             PermissionGroup.locationAlways,
+             PermissionGroup.locationWhenInUse:
+            return LocationPermissionStrategy()
+        case PermissionGroup.mediaLibrary:
+            return MediaLibraryPermissionStrategy()
+        case PermissionGroup.microphone:
+            return AudioVideoPermissionStrategy()
+        case PermissionGroup.photos:
+            return PhotoPermissionStrategy()
+        case PermissionGroup.reminders:
+            return EventPermissionStrategy()
+        case PermissionGroup.sensors:
+            return SensorPermissionStrategy()
+        case PermissionGroup.speech:
+            return SpeechPermissionStrategy()
+        }
+    }
+}

ios/Classes/SwiftPermissionHandlerPlugin.swift

+
+import CoreLocation
+import CoreMotion
+import EventKit
 import Flutter
+import Foundation
+import Photos
 import UIKit
     
 public class SwiftPermissionHandlerPlugin: NSObject, FlutterPlugin {
-  public static func register(with registrar: FlutterPluginRegistrar) {
-    let channel = FlutterMethodChannel(name: "permission_handler", binaryMessenger: registrar.messenger())
-    let instance = SwiftPermissionHandlerPlugin()
-    registrar.addMethodCallDelegate(instance, channel: channel)
-  }
+    private static let METHOD_CHANNEL_NAME = "flutter.baseflow.com/permissions/methods";
+    
+    public static func register(with registrar: FlutterPluginRegistrar) {
+        let channel = FlutterMethodChannel(name: METHOD_CHANNEL_NAME, binaryMessenger: registrar.messenger())
+        let instance = SwiftPermissionHandlerPlugin()
+        registrar.addMethodCallDelegate(instance, channel: channel)
+    }
 
-  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
-    result("iOS " + UIDevice.current.systemVersion)
-  }
+    public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        if call.method == "checkPermissionStatus" {
+            PermissionManager.checkPermissionStatus(
+                permission: Codec.decodePermissionGroup(from: call.arguments),
+                result: result)
+        } else {
+            result(FlutterMethodNotImplemented)
+        }
+    }
 }

ios/Classes/data/PermissionGroup.swift

+//
+//  PermissionGroup.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 25/07/2018.
+//
+
+import Foundation
+
+enum PermissionGroup : String, Codable {
+    case calendar = "calendar"
+    case camera = "camera"
+    case contacts = "contacts"
+    case location = "location"
+    case locationAlways = "locationAlways"
+    case locationWhenInUse = "locationWhenInUse"
+    case mediaLibrary = "mediaLibrary"
+    case microphone = "microphone"
+    case photos = "photos"
+    case reminders = "reminders"
+    case sensors = "sensors"
+    case speech = "speech"
+}

ios/Classes/data/PermissionStatus.swift

+//
+//  PermissionStatus.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 25/07/2018.
+//
+
+import Foundation
+
+enum PermissionStatus : String, Codable {
+    case denied = "denied"
+    case disabled = "disabled"
+    case granted = "granted"
+    case restricted = "restricted"
+    case unknown = "unknown"
+}

ios/Classes/strategies/AudioVideoPermissionStrategy.swift

+//
+//  AudioVideoPermissions.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+import AVFoundation
+import Foundation
+
+class AudioVideoPermissionStrategy : NSObject, PermissionStrategy {
+    
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        if permission == PermissionGroup.camera {
+            return AudioVideoPermissionStrategy.getPermissionStatus(mediaType: AVMediaType.video)
+        } else if permission == PermissionGroup.microphone {
+            return AudioVideoPermissionStrategy.getPermissionStatus(mediaType: AVMediaType.audio)
+        }
+        
+        return PermissionStatus.unknown
+    }
+    
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus {
+        // TODO: Add implementation
+        return PermissionStatus.unknown
+    }
+    
+    private static func getPermissionStatus(mediaType: AVMediaType) -> PermissionStatus {
+        let status: AVAuthorizationStatus = AVCaptureDevice.authorizationStatus(for: mediaType)
+        
+        switch status {
+        case AVAuthorizationStatus.authorized:
+            return PermissionStatus.granted
+        case AVAuthorizationStatus.denied:
+            return PermissionStatus.denied
+        case AVAuthorizationStatus.restricted:
+            return PermissionStatus.restricted
+        default:
+            return PermissionStatus.unknown
+        }
+    }
+}

ios/Classes/strategies/ContactPermissionStrategy.swift

+//
+//  ContactPermissions.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import AddressBook
+import Foundation
+
+class ContactPermissionStrategy : NSObject, PermissionStrategy {
+    
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        return ContactPermissionStrategy.getPermissionStatus()
+    }
+    
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus {
+        // TODO: Add implementation
+        return PermissionStatus.unknown
+    }
+    
+    private static func getPermissionStatus() -> PermissionStatus {
+        let status: ABAuthorizationStatus = ABAddressBookGetAuthorizationStatus()
+        
+        switch status {
+        case ABAuthorizationStatus.authorized:
+            return PermissionStatus.granted
+        case ABAuthorizationStatus.denied:
+            return PermissionStatus.denied
+        case ABAuthorizationStatus.restricted:
+            return PermissionStatus.restricted
+        default:
+            return PermissionStatus.unknown
+        }
+    }
+}

ios/Classes/strategies/EventPermissionStrategy.swift

+//
+//  EventPermissions.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import EventKit
+import Foundation
+
+class EventPermissionStrategy : NSObject, PermissionStrategy {
+
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        if permission == PermissionGroup.calendar {
+            return EventPermissionStrategy.getPermissionStatus(entityType: EKEntityType.event)
+        } else if permission == PermissionGroup.reminders {
+            return EventPermissionStrategy.getPermissionStatus(entityType: EKEntityType.reminder)
+        }
+        
+        return PermissionStatus.unknown
+    }
+    
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus {
+        // TODO: Add implementation
+        return PermissionStatus.unknown
+    }
+    
+    private static func getPermissionStatus(entityType: EKEntityType) -> PermissionStatus {
+        let status: EKAuthorizationStatus = EKEventStore.authorizationStatus(for: entityType)
+        
+        switch status {
+        case EKAuthorizationStatus.authorized:
+            return PermissionStatus.granted
+        case EKAuthorizationStatus.denied:
+            return PermissionStatus.denied
+        case EKAuthorizationStatus.restricted:
+            return PermissionStatus.restricted
+        default:
+            return PermissionStatus.unknown
+            
+        }
+    }
+}

ios/Classes/strategies/LocationPermissionStrategy.swift

+//
+//  LocationPermissions.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import CoreLocation
+import Foundation
+
+class LocationPermissionStrategy : NSObject, PermissionStrategy {
+    
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        return LocationPermissionStrategy.getPermissionStatus(permission: permission)
+    }
+    
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus {
+        // TODO: Add implementation
+        return PermissionStatus.unknown
+    }
+    
+    private static func getPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        if !CLLocationManager.locationServicesEnabled() {
+            return PermissionStatus.disabled
+        }
+        
+        let status: CLAuthorizationStatus = CLLocationManager.authorizationStatus()
+        
+        if #available(iOS 8.0, *) {
+            if permission == PermissionGroup.locationAlways {
+                switch status {
+                case CLAuthorizationStatus.authorizedAlways:
+                    return PermissionStatus.granted
+                case CLAuthorizationStatus.authorizedWhenInUse,
+                     CLAuthorizationStatus.denied:
+                    return PermissionStatus.denied
+                case CLAuthorizationStatus.restricted:
+                    return PermissionStatus.restricted
+                default:
+                    return PermissionStatus.unknown
+                }
+            }
+            
+            switch status {
+            case CLAuthorizationStatus.authorizedAlways,
+                 CLAuthorizationStatus.authorizedWhenInUse:
+                return PermissionStatus.granted
+            case CLAuthorizationStatus.denied:
+                return PermissionStatus.denied
+            case CLAuthorizationStatus.restricted:
+                return PermissionStatus.restricted
+            default:
+                return PermissionStatus.unknown
+            }
+        }
+        
+        switch status {
+        case CLAuthorizationStatus.authorized:
+            return PermissionStatus.granted
+        case CLAuthorizationStatus.denied:
+            return PermissionStatus.denied
+        case CLAuthorizationStatus.restricted:
+            return PermissionStatus.restricted
+        default:
+            return PermissionStatus.unknown
+        }
+    }
+}

ios/Classes/strategies/MediaLibraryPermissionStrategy.swift

+//
+//  MediaLibraryPermissions.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import Foundation
+import MediaPlayer
+
+class MediaLibraryPermissionStrategy : NSObject, PermissionStrategy {
+    
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        return MediaLibraryPermissionStrategy.getPermissionStatus()
+    }
+    
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus {
+        // TODO: Add implementation
+        return PermissionStatus.unknown
+    }
+    
+    private static func getPermissionStatus() -> PermissionStatus {
+        if #available(iOS 9.3, *) {
+            let status: MPMediaLibraryAuthorizationStatus = MPMediaLibrary.authorizationStatus()
+            
+            switch status {
+            case MPMediaLibraryAuthorizationStatus.authorized:
+                return PermissionStatus.granted
+            case MPMediaLibraryAuthorizationStatus.denied:
+                return PermissionStatus.denied
+            case MPMediaLibraryAuthorizationStatus.restricted:
+                return PermissionStatus.restricted
+            default:
+                return PermissionStatus.unknown
+            }
+        }
+        
+        return PermissionStatus.unknown
+    }
+}

ios/Classes/strategies/PermissionStrategy.swift

+//
+//  Task.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import Foundation
+
+protocol PermissionStrategy {
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus
+}

ios/Classes/strategies/PhotoPermissionStrategy.swift

+//
+//  PhotoPermissions.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import Foundation
+import Photos
+
+class PhotoPermissionStrategy : NSObject, PermissionStrategy {
+    
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        return PhotoPermissionStrategy.getPermissionStatus()
+    }
+    
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus {
+        // TODO: Add implementation
+        return PermissionStatus.unknown
+    }
+    
+    private static func getPermissionStatus() -> PermissionStatus {
+        let status: PHAuthorizationStatus = PHPhotoLibrary.authorizationStatus()
+        
+        switch status {
+        case PHAuthorizationStatus.authorized:
+            return PermissionStatus.granted
+        case PHAuthorizationStatus.denied:
+            return PermissionStatus.denied
+        case PHAuthorizationStatus.restricted:
+            return PermissionStatus.restricted
+        default:
+            return PermissionStatus.unknown
+        }
+    }
+}

ios/Classes/strategies/SensorPermissionStrategy.swift

+//
+//  SensorPermissions.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import CoreMotion
+import Foundation
+
+class SensorPermissionStrategy : NSObject, PermissionStrategy {
+    
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        return SensorPermissionStrategy.getPermissionStatus()
+    }
+    
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus {
+        // TODO: Add implementation
+        return PermissionStatus.unknown
+    }
+    
+    private static func getPermissionStatus() -> PermissionStatus {
+        if !CMMotionActivityManager.isActivityAvailable() {
+            return PermissionStatus.disabled
+        }
+        
+        if #available(iOS 11.0, *) {
+            let status: CMAuthorizationStatus = CMMotionActivityManager.authorizationStatus()
+            
+            switch status {
+            case CMAuthorizationStatus.authorized:
+                return PermissionStatus.granted
+            case CMAuthorizationStatus.denied:
+                return PermissionStatus.denied
+            case CMAuthorizationStatus.restricted:
+                return PermissionStatus.restricted
+            default:
+                return PermissionStatus.unknown
+            }
+        }
+        
+        return PermissionStatus.unknown
+    }
+}

ios/Classes/strategies/SpeechPermissionStrategy.swift

+//
+//  SpeechPermissions.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 26/07/2018.
+//
+
+import Foundation
+import Speech
+
+class SpeechPermissionStrategy : NSObject, PermissionStrategy {
+    
+    func checkPermissionStatus(permission: PermissionGroup) -> PermissionStatus {
+        return SpeechPermissionStrategy.getPermissionStatus()
+    }
+    
+    func requestPermission(permission: PermissionGroup) -> PermissionStatus {
+        // TODO: Add implementation
+        return PermissionStatus.unknown
+    }
+    
+    private static func getPermissionStatus() -> PermissionStatus {
+        if #available(iOS 10.0, *) {
+            let status: SFSpeechRecognizerAuthorizationStatus = SFSpeechRecognizer.authorizationStatus()
+            
+            switch status {
+            case SFSpeechRecognizerAuthorizationStatus.authorized:
+                return PermissionStatus.granted
+            case SFSpeechRecognizerAuthorizationStatus.denied:
+                return PermissionStatus.denied
+            case SFSpeechRecognizerAuthorizationStatus.restricted:
+                return PermissionStatus.restricted
+            default:
+                return PermissionStatus.unknown
+            }
+        }
+        
+        return PermissionStatus.unknown
+    }
+}

ios/Classes/utils/Codec.swift

+//
+//  Codec.swift
+//  permission_handler
+//
+//  Created by Maurits van Beusekom on 25/07/2018.
+//
+
+import Foundation
+
+struct Codec {
+    private static let jsonDecoder = JSONDecoder()
+    private static let jsonEncoder = JSONEncoder()
+    
+    static func decodePermissionGroup(from arguments: Any?) -> PermissionGroup {
+        var permissionString: String = arguments as! String
+        permissionString.removeFirst()
+        permissionString.removeLast()
+        
+        return PermissionGroup(rawValue: permissionString)!
+    }
+    
+    static func encodePermissionStatus(permissionStatus: PermissionStatus) -> String? {
+        let status = "\"" + permissionStatus.rawValue + "\""
+        return status
+    }
+}