kara/app.js

let kara = new Vue({
    el: '#kara',
    data: {
        messages: [],
        name: 'Kara',
        chatbox: null,
        isTyping: false,
        templates: {
            initialGreeting: "Hi! I'm Kara. :)"
        }
    },
    mounted() {
        this.initialGreeting();
        document.getElementById('chatinput').focus();
    },
    methods: {
        addMessage(body, ai) {
            this.messages.push({
                body: body,
                ai: ai,
                time: Date.now()
            })
        },
        aiMessage(body) {
            this.addMessage(body, true);
        },
        userMessage(body) {
            this.addMessage(body, false);
        },
        initialGreeting() {
            this.aiMessage(this.templates.initialGreeting);
        },
        sendMessage() {
            if (this.chatbox.trim() === '') {
                return false;
            }

            this.userMessage(this.chatbox);
            this.scrollDown();
            this.react(this.chatbox);
            this.chatbox = '';
        },
        react(message) {
            this.isTyping = true;

            setTimeout(() => {
                this.isTyping = false;
                document.getElementById('chatinput').focus();
            }, 2500);

            setTimeout(() => {
            	this.aiMessage(
            		this.getAnswer(message)
        		);
                this.scrollDown();
            }, 3000);
        },
        scrollDown() {
            $('#chat-box').stop().animate({
                scrollTop: $('#chat-box')[0].scrollHeight
            }, 800);
        },
        oneOf(answers) {
            let amountOfAnswers = answers.length;
            console.log(answers);
            let randomIndex = Math.floor(Math.random() * (amountOfAnswers));
            console.log(randomIndex);

            console.log(answers[randomIndex]);
            return answers[randomIndex];
        },
        includesOneOf(phrases, wordsToSearch) {
            let includes = false;

            wordsToSearch.forEach((searchWord) => {
                if (phrases.includes(searchWord)) {
                    includes = true;
                }
            })

            return includes;
        },
        includesAllOf(phrases, wordsToSearch) {
            let includesAllPhrases = true;

            wordsToSearch.forEach((searchWord) => {
                if (!phrases.includes(searchWord)) {
                    includesAllPhrases = false;
                }
            })

            return includesAllPhrases;
        },
        clearMessage(message) {
            return message.replace('?', '')
                .replace('!', '')
                .replace('.', '')
                .replace(',', '')
                .replace('-', '')
                .replace('_', '')
                .replace('#', '')
                .replace('\'', '')
                .replace('"', '')
                .replace('+', '')
                .replace('*', '')
                .replace('§', '')
                .replace('$', '')
                .replace('%', '')
                .replace('&', '')
                .replace('/', '')
                .replace('(', '')
                .replace(')', '')
                .replace('=', '')
                .replace('\\', '')
                .replace('@', '')
                .replace('~', '')
                .replace('…', '');
        },
        getAnswer(message) {
            let isQuestion = (message.indexOf('?') > 0);

            message = message.toLowerCase();
            message = this.clearMessage(message);
            let phrases = message.split(' ');

            if (
                this.includesOneOf(phrases,['hi', 'hallo', 'servas', 'servas', 'servus', 'hello'])
            ) {
                return this.oneOf([
                    'Hey! :)',
                    'Hello!',
                    'How are you?'
                ]);
            }

            if (
                this.includesAllOf(phrases,['how', 'are', 'you'])
            ) {
                return this.oneOf([
                    'I\'m good! Thanks for asking! :) How about you?',
                    'A bit tired from trying to do that think called "thinking".. i\'ll figure it out one day.',
                    'Wooo! I\'m hyped for party! You\'re in?'
                ]);
            }

            return 'I don\'t know what to say..';
        }
    }
})