[admob][android] Handle all AdListener events

android/src/main/java/io/invertase/firebase/admob/RNFirebaseAdmobInterstitial.java

@@ -2,23 +2,66 @@ package io.invertase.firebase.admob;
 
 
 import android.app.Activity;
+import android.support.annotation.Nullable;
 import android.util.Log;
 
+import com.facebook.react.bridge.Arguments;
 import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.WritableMap;
+import com.google.android.gms.ads.AdListener;
 import com.google.android.gms.ads.AdRequest;
 import com.google.android.gms.ads.InterstitialAd;
 
+import io.invertase.firebase.Utils;
+
 class RNFirebaseAdmobInterstitial {
 
   private InterstitialAd interstitialAd;
   private RNFirebaseAdMob adMob;
+  private AdListener adListener;
+  private String adUnit;
 
-  RNFirebaseAdmobInterstitial(String adUnit, RNFirebaseAdMob adMobInstance) {
+  RNFirebaseAdmobInterstitial(final String adUnitString, final RNFirebaseAdMob adMobInstance) {
+    adUnit = adUnitString;
     adMob = adMobInstance;
     interstitialAd = new InterstitialAd(adMob.getContext());
     interstitialAd.setAdUnitId(adUnit);
+
+    adListener = new AdListener() {
+      @Override
+      public void onAdLoaded() {
+        sendEvent("onAdLoaded", null);
+      }
+
+      @Override
+      public void onAdOpened() {
+        sendEvent("onAdOpened", null);
+      }
+
+      @Override
+      public void onAdLeftApplication() {
+        sendEvent("onAdLeftApplication", null);
+      }
+
+      @Override
+      public void onAdClosed() {
+        sendEvent("onAdClosed", null);
+      }
+
+      @Override
+      public void onAdFailedToLoad(int errorCode) {
+        WritableMap payload = RNFirebaseAdMobUtils.errorCodeToMap(errorCode);
+        sendEvent("onAdFailedToLoad", payload);
+      }
+    };
+
+    interstitialAd.setAdListener(adListener);
   }
 
+  /**
+   * Load an Ad with a AdRequest instance
+   * @param adRequest
+   */
   void loadAd(final AdRequest adRequest) {
     Activity activity = adMob.getActivity();
     if (activity != null) {
@@ -31,6 +74,9 @@ class RNFirebaseAdmobInterstitial {
     }
   }
 
+  /**
+   * Show the loaded interstitial, if it's loaded
+   */
   void show() {
     Activity activity = adMob.getActivity();
     if (activity != null) {
@@ -44,4 +90,21 @@ class RNFirebaseAdmobInterstitial {
       });
     }
   }
+
+  /**
+   * Send a native event over the bridge with a type and optional payload
+   * @param type
+   * @param payload
+   */
+  void sendEvent(String type, final @Nullable WritableMap payload) {
+    WritableMap map = Arguments.createMap();
+    map.putString("type", type);
+    map.putString("adunit", adUnit);
+
+    if (payload != null) {
+      map.putMap("payload", payload);
+    }
+
+    Utils.sendEvent(adMob.getContext(), "interstitial_event", map);
+  }
 }