voice-enabled-chatbot/index.html at main · MuhammadHassan2020/voice-enabled-chatbot · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>RASA Voice Assistant</title>
  <style>
    body {
      font-family: sans-serif;
      background: #f0f0f0;
      text-align: center;
      padding: 30px;
    }
    #chat {
      width: 90%;
      max-width: 600px;
      height: 400px;
      margin: 20px auto;
      padding: 10px;
      overflow-y: scroll;
      background: white;
      border-radius: 10px;
      border: 1px solid #ccc;
    }
    .msg {
      margin: 10px;
      padding: 10px;
      border-radius: 5px;
      max-width: 80%;
    }
    .user { background: #dcf8c6; text-align: right; margin-left: auto; }
    .bot { background: #eee; text-align: left; margin-right: auto; }
    button {
      padding: 10px 20px;
      font-size: 18px;
      margin-top: 10px;
      background: #28a745;
      color: white;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }
  </style>
</head>
<body>

  <h2>🎤 Rasa Voice Assistant</h2>
  <div id="chat"></div>
  <button id="mic" title="Press 'S' to start voice chat">🎙️ Tap to Start Voice Chat</button>

  <script>
    const chat = document.getElementById("chat");
    const micBtn = document.getElementById("mic");

    let listening = false;
    let inactivityTimer;

    function appendMessage(text, className) {
      const div = document.createElement("div");
      div.className = `msg ${className}`;
      div.textContent = text;
      chat.appendChild(div);
      chat.scrollTop = chat.scrollHeight;
    }

    function sendToRasa(text) {
      appendMessage(text, "user");
      resetInactivityTimer();

      fetch("http://localhost:5005/webhooks/rest/webhook", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ sender: "user", message: text })
      })
      .then(res => res.json())
      .then(data => {
        if (data.length) {
          data.forEach(msg => {
            if (msg.text) {
              appendMessage(msg.text, "bot");
              speak(msg.text);
            }
          });
        } else {
          appendMessage("🤖 I didn’t get a reply from the assistant.", "bot");
        }
      })
      .catch(err => {
        console.error("Rasa server error:", err);
        appendMessage("Oops! I couldn't reach the server.", "bot");
        speak("Oops! I couldn't reach the server.");
      });
    }

    function speak(text) {
      const utterance = new SpeechSynthesisUtterance(text);

      // Stop listening to prevent echo
      if (listening) {
        recognition.stop();
      }

      micBtn.textContent = "🗣️ Speaking...";
      speechSynthesis.speak(utterance);

      utterance.onend = () => {
        if (listening) {
          recognition.start();
          micBtn.textContent = "🎧 Listening...";
        } else {
          micBtn.textContent = "🎙️ Tap to Start Voice Chat";
        }
      };
    }

    // 🎤 Voice input setup
    const SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition;
    const recognition = new SpeechRecognition();
    recognition.lang = "en-US";
    recognition.interimResults = false;
    recognition.continuous = true;

    micBtn.onclick = () => {
      if (!listening) {
        listening = true;
        recognition.start();
        micBtn.textContent = "🎧 Listening...";
        resetInactivityTimer();
      }
    };

    recognition.onresult = (event) => {
      const transcript = event.results[event.results.length - 1][0].transcript.toLowerCase();
      sendToRasa(transcript);

      if (transcript.includes("bye") || transcript.includes("goodbye")) {
        speak("Goodbye! Take care.");
        appendMessage("Goodbye! Take care.", "bot");
        recognition.stop();
        listening = false;
        micBtn.textContent = "🎙️ Tap to Start Voice Chat";
        clearTimeout(inactivityTimer);
      }
    };

    recognition.onend = () => {
      if (listening) {
        recognition.start(); // auto-restart if still active
      }
    };

    recognition.onerror = (event) => {
      console.log("Speech recognition error:", event.error);
      micBtn.textContent = "🎙️ Tap to Start Voice Chat";
    };

    function resetInactivityTimer() {
      clearTimeout(inactivityTimer);
      inactivityTimer = setTimeout(() => {
        speak("Goodbye! You've been silent for a while.");
        appendMessage("Goodbye! You've been silent for a while.", "bot");
        recognition.stop();
        listening = false;
        micBtn.textContent = "🎙️ Tap to Start Voice Chat";
      }, 60000); // 1 minute
    }

    // 🟢 Keyboard shortcut: Press "S" to start voice
    document.addEventListener("keydown", (e) => {
      if (e.key.toLowerCase() === "s") {
        micBtn.click();
      }
    });
  </script>

</body>
</html>