app.vue

<template>
<div id="app" class="container-fluid">
    <nav class="navbar navbar-light bg-light">
        <div class="container">
            <a class="navbar-brand" href="#">
                <img src="./assets/logo.png" width="10%" height="10%" class="d-inline-block align-top" type="button" data-toggle="modal" data-target="#myModal">
            </a>
        </div>
    </nav>
    <div class="input-group mb-3" v-if="unlocked_">
        <textarea class="form-control" id="exampleFormControlTextarea1" v-model="inputField" v-on:keyup.enter="save" v-on:click="update" width="50%" height="50%" rows="20"></textarea>
        <div class="input-group-append">
            <button class="btn btn-outline-primary" type="button" v-on:click="save">SAVE</button>
        </div>
    </div>
    <!-- The Modal -->
    <div class="modal" id="myModal">
        <div class="modal-dialog">
            <div class="modal-content">
                <!-- Modal body -->
                <div class="modal-body">
                    <div class="input-group">
                        <input id="password" type="password" v-model="password" class="form-control" name="password" placeholder="Password">
                    </div>
                </div>

                <!-- Modal footer -->
                <div class="modal-footer">
                    <button type="button" class="btn btn-success col-12 text-center" data-dismiss="modal" v-on:click="unlock">DECRYPT</button>
                </div>

            </div>
        </div>
    </div>
</div>
</template>

<script>
var CryptoJS = require("crypto-js");
import Cookies from 'js-cookie'
var fb = require('./store.js');

if (Cookies.get('key_')) {
    var unlocked = true;
    var key_ = Cookies.get('key_');
} else if (!Cookies.get('key_')) {
    var unlocked = false;
    var key_ = null;
    alert("¯\_(ツ)_/¯")
}
var inputField_;
export default {
    name: 'App',
    beforeCreate() {
        fb.db.collection("bin").doc("paste")
            .onSnapshot(function (doc) {
                inputField_ = decrypt(doc.data().field);
                this.inputField = decrypt(doc.data().field);
            });
    },
    updated() {
        inputField_ = this.inputField
    },
    data() {
        return {
            unlocked_: unlocked,
            inputField: inputField_,
            password: null,
        }
    },
    methods: {
        unlock: function (event) {
            if (checkKey(this.password)) {
                Cookies.set('key_', this.password, {
                    expires: 365
                })
                if (this.password) {
                    this.unlocked_ = true;
                    this.decrypted = true;
                }
            }
        },
        save: function (event) {
            // Add a new document in collection "cities"
            fb.db.collection("bin").doc("paste").set({
                    field: encrypt(this.inputField)
                })
                .then(function () {
                    console.log("Document successfully written!");
                    window.navigator.vibrate(200);
                })
                .catch(function (error) {
                    console.error("Error writing document: ", error);
                });
        },
        update: function (event) {
            this.inputField = inputField_
        }
    },
    computed: {
        shit: function () {
            alert(inputField_)
            return inputField_;
        }
    }
}

function decrypt(data_) {
    if (key_) {
        try {
            var decrypted = CryptoJS.AES.decrypt(data_, key_);
            return decrypted.toString(CryptoJS.enc.Utf8);
        } catch (e) {
            return data_
            console.log(e)
        }
    } else {
        return data_
        console.log(e)
    }
}

function encrypt(data_) {
    if (key_) {
        var encrypted = CryptoJS.AES.encrypt(data_, key_);
        return encrypted.toString();
    } else {
        return data_
        console.log(e)
    }
}

function checkKey(input_) {
    var decrypted = CryptoJS.AES.decrypt('U2FsdGVkX19CZxyjXIRZeb3N+ffdvboRFIyQELM1ab0=', input_);
    if (decrypted.toString(CryptoJS.enc.Utf8) == "aezakmi") {
        return true;
    }
}
</script>

<style>
.navbar-brand {
    width: 100%;
    left: 0;
    top: 0;
    text-align: center;
    margin: auto;
}
</style>