rag-solution/services/rag/langchain/demo.html

<style>
  :root {
    --body-bg: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --msger-bg: #fff;
    --border: 2px solid #ddd;
    --left-msg-bg: #ececec;
    --right-msg-bg: #579ffb;
  }

  html {
    box-sizing: border-box;
  }

  *,
  *:before,
  *:after {
    margin: 0;
    padding: 0;
    box-sizing: inherit;
  }

  body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-image: var(--body-bg);
    font-family: Helvetica, sans-serif;
  }

  .msger {
    display: flex;
    flex-flow: column wrap;
    justify-content: space-between;
    width: 100%;
    max-width: 867px;
    margin: 25px 10px;
    height: calc(100% - 50px);
    border: var(--border);
    border-radius: 5px;
    background: var(--msger-bg);
    box-shadow: 0 15px 15px -5px rgba(0, 0, 0, 0.2);
  }

  .msger-header {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    border-bottom: var(--border);
    background: #eee;
    color: #666;
  }

  .msger-chat {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
  }
  .msger-chat::-webkit-scrollbar {
    width: 6px;
  }
  .msger-chat::-webkit-scrollbar-track {
    background: #ddd;
  }
  .msger-chat::-webkit-scrollbar-thumb {
    background: #bdbdbd;
  }
  .msg {
    display: flex;
    align-items: flex-end;
    margin-bottom: 10px;
  }
  .msg:last-of-type {
    margin: 0;
  }
  .msg-img {
    width: 50px;
    height: 50px;
    margin-right: 10px;
    background: #ddd;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    border-radius: 50%;
  }
  .msg-bubble {
    max-width: 450px;
    padding: 15px;
    border-radius: 15px;
    background: var(--left-msg-bg);
  }
  .msg-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
  }
  .msg-info-name {
    margin-right: 10px;
    font-weight: bold;
  }
  .msg-info-time {
    font-size: 0.85em;
  }

  .left-msg .msg-bubble {
    border-bottom-left-radius: 0;
  }

  .right-msg {
    flex-direction: row-reverse;
  }
  .right-msg .msg-bubble {
    background: var(--right-msg-bg);
    color: #fff;
    border-bottom-right-radius: 0;
  }
  .right-msg .msg-img {
    margin: 0 0 0 10px;
  }

  .msger-inputarea {
    display: flex;
    padding: 10px;
    border-top: var(--border);
    background: #eee;
  }
  .msger-inputarea * {
    padding: 10px;
    border: none;
    border-radius: 3px;
    font-size: 1em;
  }
  .msger-input {
    flex: 1;
    background: #ddd;
  }
  .msger-send-btn {
    margin-left: 10px;
    background: rgb(0, 196, 65);
    color: #fff;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.23s;
  }
  .msger-send-btn:hover {
    background: rgb(0, 180, 50);
  }

  .msger-chat {
    background-color: #fcfcfe;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='260' viewBox='0 0 260 260'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%23dddddd' fill-opacity='0.4'%3E%3Cpath d='M24.37 16c.2.65.39 1.32.54 2H21.17l1.17 2.34.45.9-.24.11V28a5 5 0 0 1-2.23 8.94l-.02.06a8 8 0 0 1-7.75 6h-20a8 8 0 0 1-7.74-6l-.02-.06A5 5 0 0 1-17.45 28v-6.76l-.79-1.58-.44-.9.9-.44.63-.32H-20a23.01 23.01 0 0 1 44.37-2zm-36.82 2a1 1 0 0 0-.44.1l-3.1 1.56.89 1.79 1.31-.66a3 3 0 0 1 2.69 0l2.2 1.1a1 1 0 0 0 .9 0l2.21-1.1a3 3 0 0 1 2.69 0l2.2 1.1a1 1 0 0 0 .9 0l2.21-1.1a3 3 0 0 1 2.69 0l2.2 1.1a1 1 0 0 0 .86.02l2.88-1.27a3 3 0 0 1 2.43 0l2.88 1.27a1 1 0 0 0 .85-.02l3.1-1.55-.89-1.79-1.42.71a3 3 0 0 1-2.56.06l-2.77-1.23a1 1 0 0 0-.4-.09h-.01a1 1 0 0 0-.4.09l-2.78 1.23a3 3 0 0 1-2.56-.06l-2.3-1.15a1 1 0 0 0-.45-.11h-.01a1 1 0 0 0-.44.1L.9 19.22a3 3 0 0 1-2.69 0l-2.2-1.1a1 1 0 0 0-.45-.11h-.01a1 1 0 0 0-.44.1l-2.21 1.11a3 3 0 0 1-2.69 0l-2.2-1.1a1 1 0 0 0-.45-.11h-.01zm0-2h-4.9a21.01 21.01 0 0 1 39.61 0h-2.09l-.06-.13-.26.13h-32.31zm30.35 7.68l1.36-.68h1.3v2h-36v-1.15l.34-.17 1.36-.68h2.59l1.36.68a3 3 0 0 0 2.69 0l1.36-.68h2.59l1.36.68a3 3 0 0 0 2.69 0L2.26 23h2.59l1.36.68a3 3 0 0 0 2.56.06l1.67-.74h3.23l1.67.74a3 3 0 0 0 2.56-.06zM-13.82 27l16.37 4.91L18.93 27h-32.75zm-.63 2h.34l16.66 5 16.67-5h.33a3 3 0 1 1 0 6h-34a3 3 0 1 1 0-6zm1.35 8a6 6 0 0 0 5.65 4h20a6 6 0 0 0 5.66-4H-13.1z'/%3E%3Cpath id='path6_fill-copy' d='M284.37 16c.2.65.39 1.32.54 2H281.17l1.17 2.34.45.9-.24.11V28a5 5 0 0 1-2.23 8.94l-.02.06a8 8 0 0 1-7.75 6h-20a8 8 0 0 1-7.74-6l-.02-.06a5 5 0 0 1-2.24-8.94v-6.76l-.79-1.58-.44-.9.9-.44.63-.32H240a23.01 23.01 0 0 1 44.37-2zm-36.82 2a1 1 0 0 0-.44.1l-3.1 1.56.89 1.79 1.31-.66a3 3 0 0 1 2.69 0l2.2 1.1a1 1 0 0 0 .9 0l2.21-1.1a3 3 0 0 1 2.69 0l2.2 1.1a1 1 0 0 0 .9 0l2.21-1.1a3 3 0 0 1 2.69 0l2.2 1.1a1 1 0 0 0 .86.02l2.88-1.27a3 3 0 0 1 2.43 0l2.88 1.27a1 1 0 0 0 .85-.02l3.1-1.55-.89-1.79-1.42.71a3 3 0 0 1-2.56.06l-2.77-1.23a1 1 0 0 0-.4-.09h-.01a1 1 0 0 0-.4.09l-2.78 1.23a3 3 0 0 1-2.56-.06l-2.3-1.15a1 1 0 0 0-.45-.11h-.01a1 1 0 0 0-.44.1l-2.21 1.11a3 3 0 0 1-2.69 0l-2.2-1.1a1 1 0 0 0-.45-.11h-.01a1 1 0 0 0-.44.1l-2.21 1.11a3 3 0 0 1-2.69 0l-2.2-1.1a1 1 0 0 0-.45-.11h-.01zm0-2h-4.9a21.01 21.01 0 0 1 39.61 0h-2.09l-.06-.13-.26.13h-32.31zm30.35 7.68l1.36-.68h1.3v2h-36v-1.15l.34-.17 1.36-.68h2.59l1.36.68a3 3 0 0 0 2.69 0l1.36-.68h2.59l1.36.68a3 3 0 0 0 2.69 0l1.36-.68h2.59l1.36.68a3 3 0 0 0 2.56.06l1.67-.74h3.23l1.67.74a3 3 0 0 0 2.56-.06zM246.18 27l16.37 4.91L278.93 27h-32.75zm-.63 2h.34l16.66 5 16.67-5h.33a3 3 0 1 1 0 6h-34a3 3 0 1 1 0-6zm1.35 8a6 6 0 0 0 5.65 4h20a6 6 0 0 0 5.66-4H246.9z'/%3E%3Cpath d='M159.5 21.02A9 9 0 0 0 151 15h-42a9 9 0 0 0-8.5 6.02 6 6 0 0 0 .02 11.96A8.99 8.99 0 0 0 109 45h42a9 9 0 0 0 8.48-12.02 6 6 0 0 0 .02-11.96zM151 17h-42a7 7 0 0 0-6.33 4h54.66a7 7 0 0 0-6.33-4zm-9.34 26a8.98 8.98 0 0 0 3.34-7h-2a7 7 0 0 1-7 7h-4.34a8.98 8.98 0 0 0 3.34-7h-2a7 7 0 0 1-7 7h-4.34a8.98 8.98 0 0 0 3.34-7h-2a7 7 0 0 1-7 7h-7a7 7 0 1 1 0-14h42a7 7 0 1 1 0 14h-9.34zM109 27a9 9 0 0 0-7.48 4H101a4 4 0 1 1 0-8h58a4 4 0 0 1 0 8h-.52a9 9 0 0 0-7.48-4h-42z'/%3E%3Cpath d='M39 115a8 8 0 1 0 0-16 8 8 0 0 0 0 16zm6-8a6 6 0 1 1-12 0 6 6 0 0 1 12 0zm-3-29v-2h8v-6H40a4 4 0 0 0-4 4v10H22l-1.33 4-.67 2h2.19L26 130h26l3.81-40H58l-.67-2L56 84H42v-6zm-4-4v10h2V74h8v-2h-8a2 2 0 0 0-2 2zm2 12h14.56l.67 2H22.77l.67-2H40zm13.8 4H24.2l3.62 38h22.36l3.62-38z'/%3E%3Cpath d='M129 92h-6v4h-6v4h-6v14h-3l.24 2 3.76 32h36l3.76-32 .24-2h-3v-14h-6v-4h-6v-4h-8zm18 22v-12h-4v4h3v8h1zm-3 0v-6h-4v6h4zm-6 6v-16h-4v19.17c1.6-.7 2.97-1.8 4-3.17zm-6 3.8V100h-4v23.8a10.04 10.04 0 0 0 4 0zm-6-.63V104h-4v16a10.04 10.04 0 0 0 4 3.17zm-6-9.17v-6h-4v6h4zm-6 0v-8h3v-4h-4v12h1zm27-12v-4h-4v4h3v4h1v-4zm-6 0v-8h-4v4h3v4h1zm-6-4v-4h-4v8h1v-4h3zm-6 4v-4h-4v8h1v-4h3zm7 24a12 12 0 0 0 11.83-10h7.92l-3.53 30h-32.44l-3.53-30h7.92A12 12 0 0 0 130 126z'/%3E%3Cpath d='M212 86v2h-4v-2h4zm4 0h-2v2h2v-2zm-20 0v.1a5 5 0 0 0-.56 9.65l.06.25 1.12 4.48a2 2 0 0 0 1.94 1.52h.01l7.02 24.55a2 2 0 0 0 1.92 1.45h4.98a2 2 0 0 0 1.92-1.45l7.02-24.55a2 2 0 0 0 1.95-1.52
  }
</style>

<section class="msger">
  <header class="msger-header">
    <div class="msger-header-title">
      <i class="fas fa-comment-alt"></i> SimpleChat
    </div>
    <div class="msger-header-options">
      <span><i class="fas fa-cog"></i></span>
    </div>
  </header>

  <main class="msger-chat">
    <div class="msg left-msg">
      <div
        class="msg-img"
        style="
          background-image: url(https://image.flaticon.com/icons/svg/327/327779.svg);
        "
      ></div>

      <div class="msg-bubble">
        <div class="msg-info">
          <div class="msg-info-name">BOT</div>
          <div class="msg-info-time">12:45</div>
        </div>

        <div class="msg-text">
          Hi, welcome to SimpleChat! Go ahead and send me a message. 😄
        </div>
      </div>
    </div>

    <div class="msg right-msg">
      <div
        class="msg-img"
        style="
          background-image: url(https://image.flaticon.com/icons/svg/145/145867.svg);
        "
      ></div>

      <div class="msg-bubble">
        <div class="msg-info">
          <div class="msg-info-name">Sajad</div>
          <div class="msg-info-time">12:46</div>
        </div>

        <div class="msg-text">You can change your name in JS section!</div>
      </div>
    </div>
  </main>

  <form class="msger-inputarea">
    <input
      type="text"
      class="msger-input"
      placeholder="Enter your message..."
    />
    <button type="submit" class="msger-send-btn">Send</button>
  </form>
</section>

<script type="text/javascript">
  const msgerForm = get(".msger-inputarea");
  const msgerInput = get(".msger-input");
  const msgerChat = get(".msger-chat");

  const BOT_MSGS = [
    "Hi, how are you?",
    "Ohh... I can't understand what you trying to say. Sorry!",
    "I like to play games... But I don't know how to play!",
    "Sorry if my answers are not relevant. :))",
    "I feel sleepy! :(",
  ];

  // Icons made by Freepik from www.flaticon.com
  const BOT_IMG = "https://image.flaticon.com/icons/svg/327/327779.svg";
  const PERSON_IMG = "https://image.flaticon.com/icons/svg/145/145867.svg";
  const BOT_NAME = "BOT";
  const PERSON_NAME = "Sajad";

  msgerForm.addEventListener("submit", (event) => {
    event.preventDefault();

    const msgText = msgerInput.value;
    if (!msgText) return;

    appendMessage(PERSON_NAME, PERSON_IMG, "right", msgText);
    msgerInput.value = "";

    botResponse();
  });

  function appendMessage(name, img, side, text) {
    //   Simple solution for small apps
    const msgHTML = `
    <div class="msg ${side}-msg">
      <div class="msg-img" style="background-image: url(${img})"></div>

      <div class="msg-bubble">
        <div class="msg-info">
          <div class="msg-info-name">${name}</div>
          <div class="msg-info-time">${formatDate(new Date())}</div>
        </div>

        <div class="msg-text">${text}</div>
      </div>
    </div>
  `;

    msgerChat.insertAdjacentHTML("beforeend", msgHTML);
    msgerChat.scrollTop += 500;
  }

  function botResponse() {
    const r = random(0, BOT_MSGS.length - 1);
    const msgText = BOT_MSGS[r];
    const delay = msgText.split(" ").length * 100;

    setTimeout(() => {
      appendMessage(BOT_NAME, BOT_IMG, "left", msgText);
    }, delay);
  }

  // Utils
  function get(selector, root = document) {
    return root.querySelector(selector);
  }

  function formatDate(date) {
    const h = "0" + date.getHours();
    const m = "0" + date.getMinutes();

    return `${h.slice(-2)}:${m.slice(-2)}`;
  }

  function random(min, max) {
    return Math.floor(Math.random() * (max - min) + min);
  }
</script>