基于jQuery实现简单人工智能聊天室

花了俩小时折腾出来的，jQuery人工智能聊天室长这样：

主要功能：

1.当然是聊天啦~点击飞机按钮或者回车可以发送消息到面板。
2.输入特定的内容，系统会给你相应的回复（这里我只设置了Hello，How are you和询问时间的自动回复）。
3.点击叉叉可以清除面板上的所有聊天记录。
4.问时间的时候，根据现在的时间，会给你相应的不同的回复，比如现在是22-23点，系统会回复你“good night”。
5.随着聊天的进行，聊天面板右侧的滚动条会一直维持在最底部。

HTML：

<div class="chat-box">
</div>
<form class="form-inline chat-form">
 <input type="text" class="form-control chat-message" placeholder="Say Something">
 <button type="button" class="btn btn-primary chat-send" title="Send Message">
 <i class="fa fa-paper-plane" aria-hidden="true">
 </i>
 </button>
 <button type="reset" class="btn btn-success chat-reset" title="Reset Message">
 <i class="fa fa-refresh" aria-hidden="true">
 </i>
 </button>
 <button type="button" class="btn btn-danger chat-clear" title="Clear the Chat Box">
 <i class="fa fa-times" aria-hidden="true">
 </i>
 </button>
</form>
<hr>
<footer>
 Designed By
 <a href="http://blog.csdn.net/alenhhy" rel="external nofollow" target="_blank">
 Alen Hu
 </a>
</footer> 

*使用了Bootstrap3框架。

JQuery:

$(document).ready(function() { 

 //send the message by click
 $(".chat-send").click(sendMsg); 

 //press enter to send
 $("form").keypress(function(event) {
  if (event.keyCode === 13) {
   event.preventDefault();
   sendMsg();
  }
 }); 

 //clear the chat box
 $(".chat-clear").click(clearChatBox);
}); 

//send message to chat box
function sendMsg() {
 var msg = $(".chat-message");
 var msgVal = msg.val();
 var chatBox = $(".chat-box");
 if (msgVal) {
  var msgAppend = "<p><span id='you'>You: </span>" + msgVal + "</p><hr class='you-hr'>";
  chatBox.append(msgAppend);
 } else {} 

 //dialog reply
 dialog(msgVal); 

 //empty input
 msg.val(""); 

 //keep the scroll in bottom
 chatBox.scrollTop(chatBox[0].scrollHeight);
} 

//set up the AI dialog
function dialog(msg){
 var replyArr = ["Hi, how's it going :)","I'm good, thx, U? :)"];
 msg = msg.toLowerCase();
 var time = new Date();
 var hour = time.getHours();
 var minute = time.getMinutes();
 var currentTime = plusZero(hour) + ":" + plusZero(minute); 

 var chatBox = $(".chat-box"); 

 if(msg.indexOf("hello") != -1){
  chatBox.append("<p><span id='ai'>AI: </span>" + replyArr[0] + "</p><hr class='ai-hr'>");
 }
 else if(msg.indexOf("how are you") != -1 || msg.indexOf("how are u") != -1){
  chatBox.append("<p><span id='ai'>AI: </span>" + replyArr[1] + "</p><hr class='ai-hr'>");
 }
 else if(msg.indexOf("time") != -1){
  chatBox.append("<p><span id='ai'>AI: </span>Current Time: " + currentTime + ". " + timeGreeting(hour) + "~ :)</p><hr class='ai-hr'>");
 }
 else {}
} 

//add 0 if time number is <10
function plusZero(x){
 if(x < 10){
  x = "0" + x;
 }
 else {
  x = x;
 }
 return x;
} 

//greeting by hour
function timeGreeting(h){
 var greeting = ["U need to sleep","Good morning","Lunch time now","Feel asleep? Have some coffee","Free time~Yeah","Good night"]; 

 if(h>=0&&h<=6){
  return greeting[0];
 }
 else if(h>=7&&h<=10){
  return greeting[1];
 }
 else if(h>=11&&h<=13){
  return greeting[2];
 }
 else if(h>=14&&h<=18){
  return greeting[3];
 }
 else if(h>=19&&h<=21){
  return greeting[4];
 }
 else if(h>=22&&h<=23){
  return greeting[5];
 }
 else {
  return "";
 }
} 

//clear the chat box
function clearChatBox() {
 $(".chat-box").html("");
} 

DEMO在这儿，欢迎FORK：AI Chat Box。

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