Merge pull request #21 from mixpanel/fix-bool-value

Fix the bool value being tracked as Int

Author: zihejia

ios/Classes/MixpanelTypeHandler.swift

@@ -8,6 +8,15 @@
         case let value as String:
             return value as MixpanelType
 
+        case let value as NSNumber:
+            if isBoolNumber(value) {
+                return value.boolValue as MixpanelType
+            } else if isInvalidNumber(value) {
+                return String(describing: value) as MixpanelType
+            } else {
+                return value as MixpanelType
+            }
+            
         case let value as Int:
             return value as MixpanelType
 
@@ -42,6 +51,18 @@
             return nil
         }
     }
+    
+    private static func isBoolNumber(_ num: NSNumber) -> Bool
+    {
+        let boolID = CFBooleanGetTypeID()
+        let numID = CFGetTypeID(num)
+        return numID == boolID
+    }
+
+    private static func isInvalidNumber(_ num: NSNumber) -> Bool
+    {
+        return num.doubleValue.isInfinite || num.doubleValue.isNaN
+    }
 
     static func mixpanelProperties(properties: Dictionary<String, Any>? = nil, mixpanelProperties: Dictionary<String, Any>? = nil) -> Dictionary<String, MixpanelType> {
         var properties = (properties != nil) ? properties : [:]