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改善したコードをのせました。

2021/02/23 11:24

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@@ -124,6 +124,135 @@
 }
 ```
+改善したコード
+```JavaScript
+import Firebase, { Firestore } from './Firebase';
+export default class Auth {
+    constructor() {
+        this.user = null;
+        this.checkUuidFlag = false;
+        this.onUuidChecked = result => { };
+        Firebase.auth().onAuthStateChanged(user => {
+            console.log("Call onAuthStateChanged.");
+            if (user) {
+                user = this.cuustomUserState(user);
+                console.log("user is ", user);
+                this.user = user;
+                if (this.checkUuidFlag) {
+                    this.checkUuidRegisteredInDb();
+                    this.checkUuidFlag = false;
+                }
+            } else {
+                console.log("user is null");
+            }
+        });
+    }
+    setOnUuidChecked = func => {
+        this.onUuidChecked = func;
+    }
+    // Googleでサインイン
+    googleSignIn = () => {
+        console.log("Google Sign In");
+        this.checkUuidFlag = true;
+        const provider = new Firebase.auth.GoogleAuthProvider();
+        Firebase.auth().signInWithPopup(provider);   // signInWithPopup or signInWithRedirect
+        Firebase.auth().getRedirectResult().then(result => {
+            console.log("Google Sign In successful.");
+            if (result != null) console.log("Get result.");
+        }).catch(error => {
+            console.log(error);
+        });
+    }
+    // サインアウト
+    signOut = () => {
+        console.log("Sign Out");
+        Firebase.auth().signOut().then(() => {
+            console.log("Sign Out successful.");
+        }).catch(error => {
+            console.log(error);
+        });
+    }
+    // DBに登録があるか確認をする
+    checkUuidRegisteredInDb = () => {
+        if (this.user == null) {
+            this.onUuidChecked(false);
+            return;
+        }
+        const uuid = this.user.uid;
+        console.log("User Id is ", uuid);
+        Firestore.collection("members").where("userId", "==", uuid)
+            .get()
+            .then(querySnapshot => {
+                console.log("Check members database.");
+                let result = false;
+                querySnapshot.some(doc => {
+                    if (doc.data().uuid == uuid) {
+                        console.log("Match uuid.");
+                        result = true;
+                        return true; // breakの役割
+                    }
+                });
+                this.onUuidChecked(result);
+            })
+            .catch(error => {
+                console.log("Error getting documents: ", error);
+                this.onUuidChecked(false);
+            });
+    }
+    cuustomUserState = user => {
+        const user_ = {
+            displayName: null,
+            email: null,
+            emailVerified: null,
+            f: null,
+            fb: null,
+            isAnonymous: null,
+            l: null,
+            m: null,
+            oa: null,
+            pa: null,
+            phoneNumber: null,
+            photoURL: null,
+            refreshToken: null,
+            tenantId: null,
+            uid: null,
+            xa: null,
+            ya: null,
+        };
+        user_.displayName = user.displayName;
+        user_.email = user.email;
+        user_.emailVerified = user.emailVerified;
+        user_.f = user.f;
+        user_.fb = user.fb;
+        user_.isAnonymous = user.isAnonymous;
+        user_.l = user.l;
+        user_.m = user.m;
+        user_.oa = user.oa;
+        user_.pa = user.pa;
+        user_.phoneNumber = user.phoneNumber;
+        user_.photoURL = user.photoURL;
+        user_.refreshToken = user.refreshToken;
+        user_.tenantId = user.tenantId;
+        user_.uid = user.uid;
+        user_.xa = user.xa;
+        user_.ya = user.ya;
+        return user_;
+    }
+}
+```
 ### 補足情報（FW/ツールのバージョンなど）
 "@testing-library/jest-dom": "^5.11.6",