Adds getDeviceId for React Native

Author: sidferreira

android/src/main/java/com/mixpanel/reactnative/MixpanelReactNativeModule.java

@@ -111,6 +111,14 @@ public void getDistinctId(final String token, Promise promise) {
         }
     }
 
+    @ReactMethod
+    public void getDeviceId(final String token, Promise promise) {
+        MixpanelAPI instance = MixpanelAPI.getInstance(this.mReactContext, token);
+        synchronized (instance) {
+            promise.resolve(instance.getAnonymousId());
+        }
+    }
+
     @ReactMethod
     public void track(final String token, final String eventName, ReadableMap properties, Promise promise) throws JSONException {
         MixpanelAPI instance = MixpanelAPI.getInstance(this.mReactContext, token);

index.d.ts

@@ -30,6 +30,7 @@ export class Mixpanel {
     eventElapsedTime(eventName: string): Promise<number>;
     reset(): void;
     getDistinctId(): Promise<string>;
+    getDeviceId(): Promise<string>;
     flush(): void;
 }
 

index.js

@@ -452,6 +452,24 @@ export class Mixpanel {
         return MixpanelReactNative.getDistinctId(this.token);
     }
 
+    /**
+     * Returns the current device id of the device.
+     * This id automatically generated by the library and regenerated when logout or reset is called.
+     *
+     * example of usage:
+     * <pre>
+     * <code>
+     * const deviceId = await mixpanel.getDeviceId();
+     * </code>
+     * </pre>
+     *
+     * @return {Promise<string>} A Promise to the device id
+     *
+     */
+    getDeviceId() {
+        return MixpanelReactNative.getDeviceId(this.token);
+    }
+
     /**
      * Push all queued Mixpanel events and People Analytics changes to Mixpanel servers.
      *

ios/MixpanelReactNative.m

@@ -44,6 +44,8 @@ @interface RCT_EXTERN_MODULE(MixpanelReactNative, NSObject)
 
 RCT_EXTERN_METHOD(getDistinctId:(NSString *)token resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
 
+RCT_EXTERN_METHOD(getDeviceId:(NSString *)token resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
+
 // MARK: - Super Properties
 
 RCT_EXTERN_METHOD(registerSuperProperties:(NSString *)token properties:(NSDictionary *)properties resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)

ios/MixpanelReactNative.swift

@@ -155,6 +155,13 @@ open class MixpanelReactNative: NSObject {
         let instance = MixpanelReactNative.getMixpanelInstance(token)
         resolve(instance?.distinctId)
     }
+
+    @objc
+    func getDeviceId(_ token: String, resolver resolve: RCTPromiseResolveBlock,
+                       rejecter reject: RCTPromiseRejectBlock) -> Void {
+        let instance = MixpanelReactNative.getMixpanelInstance(token)
+        resolve(instance?.anonymousId)
+    }
 
     // MARK: - Super Properties