Fix chat box and add Delete feature

chat_box/models.py

@@ -15,6 +15,7 @@ class Message(models.Model):
     author = models.ForeignKey(Profile, verbose_name=_('user'), on_delete=CASCADE)
     time = models.DateTimeField(verbose_name=_('posted time'), auto_now_add=True)
     body = models.TextField(verbose_name=_('body of comment'), max_length=8192)
+    hidden = models.BooleanField(verbose_name='is hidden', default=False)
 
     def save(self, *args, **kwargs):
         new_message = self.id

chat_box/routing.py

@@ -2,6 +2,7 @@ from django.urls import re_path
 
 from . import consumers
 
+ASGI_APPLICATION = "chat_box.routing.application"
 websocket_urlpatterns = [
     re_path(r'ws/chat/', consumers.ChatConsumer),
 ]

chat_box/views.py

@@ -1,6 +1,6 @@
 from django.utils.translation import gettext as _
 from django.views.generic import ListView
-from django.http import HttpResponse
+from django.http import HttpResponse, JsonResponse
 from django.core.paginator import Paginator
 
 from judge.jinja2.gravatar import gravatar
@@ -28,7 +28,7 @@ class ChatView(ListView):
     template_name = 'chat/chat.html'
     title = _('Chat Box')
     paginate_by = 50
-    paginator = Paginator(Message.objects.all(), paginate_by)
+    paginator = Paginator(Message.objects.filter(hidden=False), paginate_by)
 
     def get(self, request, *args, **kwargs):
         page = request.GET.get('page')
@@ -46,3 +46,25 @@ class ChatView(ListView):
             msg.time = format_time(msg.time)
 
         return context
+
+def delete_message(request):
+    ret = {'delete': 'done'}
+    
+    if request.method == 'GET':
+        return JsonResponse(ret)
+
+    if request.user.is_staff:
+        author = request.POST.get('author')
+        time = request.POST.get('messtime')
+        all_mess = Message.objects.all()
+        
+        for mess in all_mess:
+            if mess.author.__str__() == author and format_time(mess.time) == time:
+                mess.hidden = True
+                mess.save()
+                new_elt = {'time': format_time(mess.time), 'content': mess.body}
+                ret = new_elt
+        
+        return JsonResponse(ret)
+    
+    return JsonResponse(ret)

dmoj/urls.py

@@ -1,4 +1,4 @@
-from chat_box.views import ChatView
+from chat_box.views import ChatView, delete_message
 from django.conf import settings
 from django.conf.urls import include, url
 from django.contrib import admin
@@ -372,6 +372,7 @@ urlpatterns = [
         url(r'^$', 
             login_required(ChatView.as_view()),
             name='chat'),
+        url(r'^delete/$', delete_message, name='delete_message')
 
     ])),
 ]

templates/chat/chat.html

@@ -38,6 +38,9 @@
                                 ${user}
                             </a>
                             <span class="time">${time}</span>
+                            {% if request.user.is_staff %}
+                            <a id="remove_btn_${user}_" class="chatbtn_remove_mess" data-messtime="${time}" data-author="${user}">Delete</a>
+                            {% endif %}
                         </div>
                         <span class="content-message">${content}                   </span>
                     </div>
@@ -55,7 +58,9 @@
         (function init_chatlog() {
             ul = $('#chat-log')
             {% for msg in message %}
+                {% if not msg.hidden %}
                     loadMessage(`{{msg.body}}`, `{{msg.author}}`, `{{msg.time}}`, `{{gravatar(msg.author, 32)}}`)
+                {% endif %}
             {% endfor %}
             $('#chat-box').scrollTop($('#chat-box')[0].scrollHeight);
         })()
@@ -97,6 +102,21 @@
 
         scrollContainer($('#chat-box'), $('#loader'))
 
+        $(document).on("click", ".chatbtn_remove_mess", function() {
+            var elt = $(this);
+            console.log(elt.data());
+            $.ajax({
+                url: 'delete/',
+                type: 'post',
+                data: elt.data(),
+                dataType: 'json',
+                success: function(data){
+                    console.log(data);
+                    console.log('delete ajax call success!');
+                    location.reload();
+                }
+            });
+        });
         
         $("#chat-submit").click(function() {
             if ($("#chat-input").val().trim()) {
@@ -158,6 +178,7 @@
 {% endblock js_media %}
 
 {% block body %}
+{% csrf_token %}
     <div id="chat-area">
         <div id="chat-box">
             <img src="http://opengraphicdesign.com/wp-content/uploads/2009/01/loader64.gif" id="loader">