Unity/Firebase/CloudFunctions

準備

Gcp/Firebase/CloudFunctions [ｼｮｰﾄｶｯﾄ]

準備(dbを使う場合)

Gcp/Firebase/Firestore [ｼｮｰﾄｶｯﾄ]

import

FirebaseFunctions.unitypackage をunityのAssets/ImportPackage/CustomPackageからImportする

初期化

using Firebase.Functions;
FirebaseFunctions functions = FirebaseFunctions.DefaultInstance;

東京リージョンの場合こちらを記述

using Firebase.Functions;
FirebaseFunctions functions = FirebaseFunctions.GetInstance("asia-northeast1");

サンプル

ScorePostInit score = new ScorePostInit();
AddScore(score);
GetTopScores();

using System.Threading.Tasks;
using System; // [Serializable]用
public class ScorePostInit {
    public string userName = "taro";
    public int point = 100;
    public string userId = "12341234";
}
async Task<object> AddScoreAsync(ScorePostInit score)
{
    object data = new Dictionary<object, object>
    {
        { "userName", score.userName },
        { "point", score.point },
        { "userId", score.userId },
    };
    return await functions.GetHttpsCallable("addScore").CallAsync(data)
        .ContinueWith(task =>
        {
            return task.Result.Data;
        });
}
public void AddScore(ScorePostInit score)
{
    AddScoreAsync(score).ContinueWith(task =>
    {
        if (task.IsFaulted)
        {
            // onError
        }
        else
        {
            // onComplete
            Debug.Log("task.Result=" + task.Result); // OK
        }
    }, TaskScheduler.FromCurrentSynchronizationContext());
}
async Task<object> ReplaceScoreByUserIdAsync(ScorePostInit score, string userId)
{
    object data = new Dictionary<object, object>
    {
            { "userName", score.userName },
            { "userId", userId },
            { "point", score.point },
    };

    return await functions.GetHttpsCallable("replaceScore").CallAsync(data)
        .ContinueWith(task =>
        {
            return task.Result.Data;
        });
}
public void ReplaceScoreByUserId(ScorePostInit score, string userId)
{
    ReplaceScoreByUserIdAsync(score, userId).ContinueWith(task =>
    {
        if (task.IsFaulted)
        {
            // onError
        }
        else
        {
            // onComplete
            Debug.Log("task.Result=" + task.Result); // OK
        }
    }, TaskScheduler.FromCurrentSynchronizationContext());
}
[Serializable]
class ResData
{
    public string status = "ok";
    public string notice = "";
    public List<ResUser> users;
}
[Serializable]
class ResUser
{
    public int point = 0;
    public string userName = "";
    public string userId = "";
}
async Task<object> GetTopScoresAsync()
{
   object data = new Dictionary<object, object>
   {
        { "count", 3 },
   };
   return await functions.GetHttpsCallable("getTopScores").CallAsync(data)
       .ContinueWith(task =>
      {
           return task.Result.Data;
      });
}
public void GetTopScores()
{
    GetTopScoresAsync().ContinueWith(task =>
    {
        if (task.IsFaulted)
        {
            // onError
        }
        else
        {
            // onComplete
            string json = task.Result.ToString();
            Debug.Log("json=" + json); // {"status":"ok","notice":"","users":[{"point":140,"name":"siro"},{"point":130,"name":"saburo"},{"point":120,"name":"jiro"}]}
            ResData resData = JsonUtility.FromJson<ResData>(json);
            Debug.Log("status=" + resData.status);
            Debug.Log("notice=" + resData.notice);
            foreach (ResUser user in resData.users)
            {
                Debug.Log("user.name=" + user.userName);
                Debug.Log("user.id=" + user.userId);
                Debug.Log("user.point=" + user.point);
            }
        }
    }, TaskScheduler.FromCurrentSynchronizationContext());
}
async Task<object> ReplaceUserNameByUserIdAsync(string userName, string userId)
{
    object data = new Dictionary<object, object>
   {
        { "name", userName },
        { "id", userId },
   };
    return await functions.GetHttpsCallable("replaceUserNameByUserId").CallAsync(data)
        .ContinueWith(task =>
        {
            return task.Result.Data;
        });
}
public void ReplaceUserNameByUserId(string userName, string userId)
{
    ReplaceUserNameByUserIdAsync(userName, userId).ContinueWith(task =>
    {
        if (task.IsFaulted)
        {
            // onError
        }
        else
        {
            // onComplete
            Debug.Log("task.Result=" + task.Result); // OK
        }
    }, TaskScheduler.FromCurrentSynchronizationContext());
}

firebaseのサーバー側変更

functions.https.onCall を使ってシリアル＆認証トークンで接続するようにする

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
// スコア追加
exports.addScore = functions
  .region('asia-northeast1')
  .https.onCall((data, context) =>
{
  const score = {
    userName : data.userName,
    point : data.point,
    userId : data.userId
  };
  return admin.firestore().collection('scores')
    .add(score)
    .then((snapshot) =>
  {
    return 'OK';
  });
});
// スコア更新
exports.replaceScore = functions
  .region('asia-northeast1')
  .https.onCall((data, context) =>
{
  const score = {
    point : data.point
  };
  if (data.userName != null) {
     score.userName = data.userName;
  }
  if (data.userId != null) {
    score.userId = data.userId;
  }
  console.log('data.userId=' + data.userId);
  return admin.firestore().collection('scores')
    .doc(data.userId).set(score)
    .then((snapshot) =>
  {
    return 'OK';
  });
});
//  トップcount件のScoreを取得
exports.getTopScores = functions
  .region('asia-northeast1')
  .https.onCall((data, context) =>
{
  const count = data.count;
  return admin.firestore().collection('scores')
    .orderBy('point', 'desc')
    .limit(count)
    .get()
    .then((snapshot) =>
  {
    var obj = {
        status: 'ok',
        notice: 'Processing succeeded.',
        users: snapshot.docs.map(x => x.data()),
    }
    var json=JSON.stringify(obj);
    return json;
  });
});
// ユーザ更新
exports.replaceUserNameByUserId = functions.region('asia-northeast1').https.onCall((data, context) => {
  const user = {
    name : data.name,
  };
  if (data.id != null) {
    user.id = data.id;
  }
  return admin.firestore().collection('users')
    .doc(data.id).set(user)
    .then((snapshot) =>
  {
    return 'OK';
  });
})

"The type initializer for 'Firebase.FirebaseApp' threw an exception."エラー

2018.4.8f1から2019.2.12f1に更新すると以下エラーが起こったが、functionsを最新にすると治った。

Rethrow as TypeInitializationException: The type initializer for 'Firebase.FirebaseApp' threw an exception.

参考

https://firebase.google.com/docs/functions/callable?hl=ja

https://devlog.hassaku.blue/2019/03/unity-firebase-firebase.html

https://firebase.google.com/docs/reference/unity/class/firebase/functions/firebase-functions

https://github.com/firebase/quickstart-unity/blob/master/functions/testapp/Assets/Firebase/Sample/Functions/UIHandler.cs