<script>
 $(function () {
  $("#send").click(function () {
   var input_info = $("#input_info").val();
   if (input_info.length < 1) {
    alert("请输入字符后发送");
    return;
   } else if (input_info.length > 200) {
    alert("每次发送不可以超出200个字符哈~");
    return;
   }
   else {
    // 获取csrftoken的值
    var csrf_value = $('#csrfmiddlewaretoken').text();
    var user_id = $("#user_id").text();
    var user_name = $("#user_name").text();
    $.ajax({
     'url': '/chatroom/save_chat_log/',
     'data': {
      'chat_content': input_info,
      'user_id': user_id,
      'user_name': user_name,
      'user_ip': '127.127.127.127',
      'csrfmiddlewaretoken': csrf_value
     },
     'type': 'post',
     'async': false,
     'success': function (data) {
     }
    });
    $("#input_info").val("");
    console.log($("#show_info").scrollTop());
   }
  })
 })
</script>
<script>
 var user_id = $("#user_id").text();
 var user_name = $("#user_name").text();
 $(function () {
  var last_id = 0;
  var csrf_value2 = $('#csrfmiddlewaretoken').text();
  function update_info() {
   // ajax 获取最新数据
   $.ajax({
    'url': '/chatroom/get_near_log/',
    'data':{"last_id":last_id,'csrfmiddlewaretoken': csrf_value2},
    'type':'post',
    'async': false,
    'success':function (data) {
     if (parseInt(last_id) == parseInt(JSON.parse(data.data).last_id)){
      return;
     }
     //获取后台传过来的id值,并将值存储到全局变量中
     last_id = JSON.parse(data.data).last_id;
     // 将内容读取,并打印
     content = JSON.parse(data.data).info;
     for (var i=0; i< content.length; i++){
      if (parseInt(content[i].user_id) == parseInt($("#user_id").text())){
       var html = "<div class='my_info'><span>"+content[i].user_name+"</span></div>";
       html = html + "<div class='my_one_info'>"+content[i].mess+"</div>";
       $("#content").append(html);
      }else{
       var html = "<div class='other_info'><span>"+content[i].user_name+"</span></div>";
       html = html + "<div class='other_one_info'>"+content[i].mess+"</div>";
       $("#content").append(html);
      }
      $("#show_info").scrollTop($("#content").height())
     }
    }
   })
  }
  update_info();
  setInterval(update_info, 1000);
 })
</script>
<script>
 $(function () {
  //监听键盘点击
  $(document).keyup(function (event) {
   if (event.keyCode == 13){
    $("#send").click();
   }
  })
 })
</script>
<script>
 $(function () {
  $("#change_name").click(function () {
   // 获取新名称
   var new_name = String($("#new_name").val());
   // 检查新名称是否合法
   // 如果合法
   if (new_name.length<11 && new_name.length>0){
    console.log(new_name);
    $("#user_name").text(new_name);
    $("#new_name").val("")
   }else{
    alert("昵称长度应为1-10,请重新输入");
    $("#new_name").val("")
   }
  })
 })
</script>
<div id="main_form">
 <div class="my_nike_name">我的昵称:<span id="user_name">{{user_name}}</span><span><button id="change_name">更名</button><input type="text" id="new_name"></span></div>
 <div id="show_info">
  <div id="content">
  </div>
 </div>
 <br>
 <div class="my_nike_name">消息</div>
 <input type="text" id="input_info">
 <button id="send">发送消息</button>
 <div id="user_id" style="display: none">{{user_id}}</div>
 <div id="user_ip" style="display: none">{{user_ip}}</div>
 <span id ="csrfmiddlewaretoken" style="display: none">{{csrf_token}}</span>
</div>

# 返回基础页面
def happy(request):
 user_info = UserInfo()
 # 初始用户名为匿名用户
 user_name = "匿名用户"
 user_info.user_name = user_name
 # 利用时间产生临时ID
 user_id = int(time.time())
 user_info.user_id = user_id
 # 获取用户ip
 user_ip = wrappers.get_client_ip(request)
 user_info.user_ip = user_ip
 user_info.save()
 return render(request, 'chatroom/happy.html', locals())
# 保存聊天内容
def save_chat_log(request):
 try:
  print("后端收到了ajax消息")
  chatinfo = ChatInfo()
  # 获取前端传过来的数据
  chat_content = wrappers.post(request, "chat_content")
  user_ip = wrappers.get_client_ip(request)
  user_name = wrappers.post(request, "user_name")
  user_id = wrappers.post(request, "user_id")
  # 将数据存入数据库
  chatinfo.chat_content = chat_content
  chatinfo.user_ip = user_ip
  chatinfo.user_name = user_name
  chatinfo.user_id = user_id
  chatinfo.save()
  return JsonResponse({"ret":0})
 except:
  return JsonResponse({"ret":"保存出现问题"})
  pass
# 获取最近的聊天信息
def get_near_log(request):
 try:
  # 获取数据库内所有的信息
  all_info = ChatInfo.objects.all()
  # 获取数据库内最后一条消息的id
  id_max =ChatInfo.objects.aggregate(Max('id'))
  last_id = id_max["id__max"]
  # print("后台数据库内最新的id为", last_id)
  # 获取请求的id值
  old_last_id = wrappers.post(request, "last_id")
  print(old_last_id,"<-<-")
  print(old_last_id, type(old_last_id),"-->")
  # print("后台发送过来的id为",old_last_id)
  # 返回的信息字典,返回当前时间(current_date),返回信息列表(id_info)
  # 如果第一次请求,则回复最后一条消息的id
  if int(old_last_id) == 0:
   user_ip = wrappers.get_client_ip(request)
   result_dict = dict()
   result_dict["last_id"] = last_id
   result_dict["info"] = [{"id":"-->", "mess":"欢迎"+user_ip+"来到聊天室!", "user_name":"系统消息:"}]
   result_dict["user_id"] = ""
   result_dict = json.dumps(result_dict,ensure_ascii=False)
   # print("第一次握手")
   return JsonResponse({"data":result_dict})
  # 如果数据内没有消息更新
  elif int(old_last_id) >= int(last_id):
   result_dict = dict()
   result_dict["last_id"] = last_id
   result_dict["info"] = [{last_id:"欢迎再次来到聊天室!"}]
   result_dict["user_id"] = ""
   result_dict = json.dumps(result_dict,ensure_ascii=False)
   # print("一次无更新的交互")
   return JsonResponse({"data":result_dict})
  # 如果有消息更新
  else:
   # print("有更新的回复")
   result_dict = dict()
   # 获取新的消息对象集合
   the_new_info =ChatInfo.objects.filter(id__gt=old_last_id)
   # 创建消息列表
   mess_list = list()
   # 将最新的消息组成字典进行返回
   for info in the_new_info:
    # print(info)
    # print ("-->",info.chat_content, info.id)
    # 创建消息字典
    mess_dic = dict()
    mess_dic["id"] = info.id
    mess_dic["mess"] = info.chat_content
    # 将消息所属的用户添加到消息列表
    mess_dic["user_name"] = info.user_name
    mess_dic["user_id"] = info.user_id
    # 将消息字典添加到消息列表
    mess_list.append(mess_dic)
  result_dict["last_id"] = last_id
  result_dict["info"] = mess_list
  # result_dict["info"] = [{"id":3, "mess":"hahah"}, {"id":4, "mess":"666"}]
  result_dict = json.dumps(result_dict,ensure_ascii=False)
  # print("--->", type(result_dict))
  return JsonResponse({"data":result_dict})
 except:
  return JsonResponse({"ret":"刷新出现问题"})
  pass