Tighten up Codable compile time assistance

Sources/Segment/Events.swift

@@ -142,7 +142,7 @@ extension Analytics {
     ///     generate the UUID and Apple's policies on IDs, see
     ///      https://segment.io/libraries/ios#ids
     ///   - properties: A dictionary of traits you know about the user. Things like: email, name, plan, etc.
-    public func track(name: String, properties: [String: Any]? = nil) {
+    public func track(name: String, properties: [String: Codable]? = nil) {
         var props: JSON? = nil
         if let properties = properties {
             do {
@@ -165,7 +165,7 @@ extension Analytics {
     ///      https://segment.io/libraries/ios#ids
     ///   - traits: A dictionary of traits you know about the user. Things like: email, name, plan, etc.
     /// In the case when user logs out, make sure to call ``reset()`` to clear user's identity info.
-    public func identify(userId: String, traits: [String: Any]? = nil) {
+    public func identify(userId: String, traits: [String: Codable]? = nil) {
         do {
             if let traits = traits {
                 let traits = try JSON(traits as Any)
@@ -187,7 +187,7 @@ extension Analytics {
     ///   - screenTitle: The title of the screen being tracked.
     ///   - category: A category to the type of screen if it applies.
     ///   - properties: Any extra metadata associated with the screen. e.g. method of access, size, etc.
-    public func screen(title: String, category: String? = nil, properties: [String: Any]? = nil) {
+    public func screen(title: String, category: String? = nil, properties: [String: Codable]? = nil) {
         var event = ScreenEvent(title: title, category: category, properties: nil)
         if let properties = properties {
             do {
@@ -204,7 +204,7 @@ extension Analytics {
     /// - Parameters:
     ///   - groupId: A unique identifier for the group identification in your system.
     ///   - traits: Traits of the group you may be interested in such as email, phone or name.
-    public func group(groupId: String, traits: [String: Any]?) {
+    public func group(groupId: String, traits: [String: Codable]?) {
         var event = GroupEvent(groupId: groupId)
         if let traits = traits {
             do {

Sources/Segment/ObjC/ObjCAnalytics.swift

@@ -41,7 +41,7 @@ extension ObjCAnalytics {
 
     @objc(track:properties:)
     public func track(name: String, properties: [String: Any]?) {
-        analytics.track(name: name, properties: properties)
+        analytics.track(name: name, properties: properties as? [String: Codable])
     }
 
     /// Associate a user with their unique ID and record traits about them.
@@ -67,7 +67,7 @@ extension ObjCAnalytics {
         if let userId = userId {
             // at first glance this looks like recursion.  It's actually calling
             // into the swift version of this call where userId is NOT optional.
-            analytics.identify(userId: userId, traits: traits)
+            analytics.identify(userId: userId, traits: codable(traits))
         } else if let traits = try? JSON(traits as Any) {
             analytics.store.dispatch(action: UserInfo.SetTraitsAction(traits: traits))
             let userInfo: UserInfo? = analytics.store.currentState()
@@ -100,7 +100,7 @@ extension ObjCAnalytics {
     ///   - properties: Any extra metadata associated with the screen. e.g. method of access, size, etc.
     @objc(screen:category:properties:)
     public func screen(title: String, category: String?, properties: [String: Any]?) {
-        analytics.screen(title: title, category: category, properties: properties)
+        analytics.screen(title: title, category: category, properties: codable(properties))
     }
 
     /// Associate a user with a group such as a company, organization, project, etc.
@@ -117,7 +117,7 @@ extension ObjCAnalytics {
     ///   - traits: Traits of the group you may be interested in such as email, phone or name.
     @objc(group:traits:)
     public func group(groupId: String, traits: [String: Any]?) {
-        analytics.group(groupId: groupId, traits: traits)
+        analytics.group(groupId: groupId, traits: codable(traits))
     }
 
     @objc(alias:)

Sources/Segment/Utilities/Utils.swift

@@ -57,3 +57,7 @@ extension Optional: Flattenable {
         }
     }
 }
+
+internal func codable(_ dict: [String: Any]?) -> [String: Codable]? {
+    return dict as? [String: Codable]
+}