Use Gson to convert javaObject to jsObject #324

Author: EddyVerbruggen

CHANGELOG.md

@@ -10,6 +10,9 @@
 - iOS: 3.13.x
 - Android: 10.2.x
 
+### New
+- [#324](https://github.com/EddyVerbruggen/nativescript-plugin-firebase/issues/324) Use Gson to convert javaObject to jsObject
+
 ### Fixes
 - [#331](https://github.com/EddyVerbruggen/nativescript-plugin-firebase/issues/331) CI builds may file if no entitlements file exists
 

firebase.android.js

@@ -14,7 +14,7 @@ firebase._facebookAccessToken = null;
 var fbCallbackManager = null;
 var GOOGLE_SIGNIN_INTENT_ID = 123;
 
-var gson = new com.google.gson.Gson();
+var gson = typeof(com.google.gson) === "undefined" ? null : new com.google.gson.Gson();
 
 (function() {
   if (typeof(com.google.firebase.messaging) === "undefined") {
@@ -109,7 +109,44 @@ firebase.toValue = function(val){
 };
 
 firebase.toJsObject = function(javaObj) {
-  return JSON.parse(gson.toJson(javaObj));
+  if (gson !== null) {
+    return JSON.parse(gson.toJson(javaObj));
+  } else {
+    // temp fallback for folks not having fetched gson yet in their build for some reason
+    return firebase.toJsObjectLegacy(javaObj);
+  }
+};
+
+firebase.toJsObjectLegacy = function(javaObj) {
+  if (javaObj === null || typeof javaObj != "object") {
+    return javaObj;
+  }
+
+  var node;
+  switch (javaObj.getClass().getName()) {
+    case 'java.lang.Boolean':
+      var str = String(javaObj);
+      return Boolean(!!(str == "True" || str == "true"));
+    case 'java.lang.String':
+      return String(javaObj);
+    case 'java.lang.Long':
+    case 'java.lang.Double':
+      return Number(String(javaObj));
+    case 'java.util.ArrayList':
+      node = [];
+      for (var i = 0; i < javaObj.size(); i++) {
+        node[i] = firebase.toJsObjectLegacy(javaObj.get(i));
+      }
+      break;
+    default:
+      node = {};
+      var iterator = javaObj.entrySet().iterator();
+      while (iterator.hasNext()) {
+        var item = iterator.next();
+        node[item.getKey()] = firebase.toJsObjectLegacy(item.getValue());
+      }
+  }
+  return node;
 };
 
 firebase.getCallbackData = function(type, snapshot) {
@@ -717,8 +754,8 @@ firebase.getAuthToken = function (arg) {
         });
 
         user.getToken(arg.forceRefresh)
-          .addOnSuccessListener(onSuccessListener)
-          .addOnFailureListener(onFailureListener);
+            .addOnSuccessListener(onSuccessListener)
+            .addOnFailureListener(onFailureListener);
 
       } else {
         reject("Log in first");
@@ -776,7 +813,7 @@ firebase.login = function (arg) {
             console.log("Logging in the user failed. " + (task.getException() && task.getException().getReason ? task.getException().getReason() : task.getException()));
             // also disconnect from Google otherwise ppl can't connect with a different account
             if (firebase._mGoogleApiClient) {
-                com.google.android.gms.auth.api.Auth.GoogleSignInApi.revokeAccess(firebase._mGoogleApiClient);
+              com.google.android.gms.auth.api.Auth.GoogleSignInApi.revokeAccess(firebase._mGoogleApiClient);
             }
             reject("Logging in the user failed. " + (task.getException() && task.getException().getReason ? task.getException().getReason() : task.getException()));
           } else {
@@ -1278,7 +1315,7 @@ firebase.update = function (path, val) {
   return new Promise(function (resolve, reject) {
     try {
       if (typeof val == "object") {
-      firebase.instance.child(path).updateChildren(firebase.toHashMap(val));
+        firebase.instance.child(path).updateChildren(firebase.toHashMap(val));
       } else {
         var lastPartOfPath = path.lastIndexOf("/");
         var pathPrefix = path.substring(0, lastPartOfPath);
@@ -1684,7 +1721,7 @@ firebase.subscribeToTopic = function(topicName){
 firebase.unsubscribeFromTopic = function(topicName){
   return new Promise(function (resolve, reject) {
     try {
-      
+
       if (typeof(com.google.firebase.messaging) === "undefined") {
         reject("Uncomment firebase-messaging in the plugin's include.gradle first");
         return;
@@ -1694,14 +1731,14 @@ firebase.unsubscribeFromTopic = function(topicName){
         reject("Can be run only after init");
         return;
       }
-      
+
       com.google.firebase.messaging.FirebaseMessaging.getInstance().unsubscribeFromTopic(topicName);
       resolve();
     } catch(ex){
       console.log("Error in firebase.unsubscribeFromTopic: " + ex);
       reject(ex);
     }
-  }); 
+  });
 };
 
 firebase.sendCrashLog = function (arg) {

scripts/postinstall.js

@@ -3067,6 +3067,9 @@ dependencies {
     compile "com.google.firebase:firebase-database:10.2.+"
     compile "com.google.firebase:firebase-auth:10.2.+"
 
+    // for converting Java objects to JS
+    compile "com.google.code.gson:gson:2.8.+"
+    
     // for reading google-services.json and configuration
     def googlePlayServicesVersion = project.hasProperty('googlePlayServicesVersion') ? project.googlePlayServicesVersion : '10.2.+'
     compile "com.google.android.gms:play-services-base:$googlePlayServicesVersion"