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【Vue.js】Firebase独自のメソッドをまとめてみよう

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#firebaseモジュールのセットアップ

$ yarn add firebase --save
main.js
import firebase from "firebase";

const config = {
  apiKey: "",
  authDomain: "",
  databaseURL: "",
  projectId: "",
  storageBucket: "",
  messagingSenderId: ""
};
firebase.initializeApp(config);

#コンポーネントでの準備

router/index.js
import signup from "@/components/signup";

export default new Router({
  routes: [
    {
      path: "/signup",
      component: signup
    },
  ]
})
components/signup.vue
# コンポーネント毎にモジュール読み込み
import firebase from "firebase";

#Usage ユーザー作成、認証系

サインアップ

signUp: function() {
  firebase
    .auth()
    .createUserWithEmailAndPassword(this.email, this.password)
    .then(user => {
      alert(user.email);
    })
    .catch(error => {
      alert(error.message);
    });
}

サインイン

signIn: function() {
  firebase
    .auth()
    .signInWithEmailAndPassword(this.email, this.password)
    .then(user => {
      alert("success");
      this.$router.push("/profile");
    })
    .catch(error => {
      alert(error.message);
    });
}

ログイン中ユーザーのデータ取得

data () {
  return {
    email: firebase.auth().currentUser.email
  }
}

ユーザーがログイン中なら、ユーザー情報を返すメソッド(ログインチェック)

firebase.auth().onAuthStateChanged(function(user) {
  if (user) {
    //ユーザーログイン時の処理
  } else {
    //ユーザーログアウト時の処理
  }
})

#Usage クラウドデータベース

firestoreの全件データを取得

firebase.firestore().collection("message").get()
  .then(function(query) {
    query.forEach(function(doc) {
      console.log(doc.data());
    });
  }).catch(function(e) {
    alert(e);
  });

firestoreの全件データの中から、条件を絞って取得

firebase.firestore().collection("message").where("name", "==", "tom").get()
  .then(function(query) {
    query.forEach(function(doc) {
      console.log(doc.data());
    });
  }).catch(function(e) {
    alert(e);
  });

firestoreにデータを追加

firebase.firestore().collection("message").add({
  name: this.nameData
})
  .then(function() {
    alert("成功しました");
  }).catch(function(e) {
    alert("失敗しました");
  });

firestoreのデータを削除

firebase.firestore().collection("message").doc("directMessage").delete(
  .then(function() {
    alert("成功しました");
  }).catch(function(e) {
    alert("失敗しました");
  });
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