v4

core/templates/core/dashboard.html

@@ -30,7 +30,7 @@
         <div class="col-md-4">
             <div class="card p-4 text-center">
                 <h6 class="text-uppercase text-muted small fw-bold">Today's Messages</h6>
-                <div class="display-4 fw-bold text-coral">0</div>
+                <div class="display-4 fw-bold text-coral">{{ today_messages_count }}</div>
             </div>
         </div>
     </div>

core/utils.py

@@ -0,0 +1,119 @@
+import requests
+import logging
+from .models import Fanpage, Flow, Node, Edge, ChatSession, MessageLog
+
+logger = logging.getLogger(__name__)
+
+def send_fb_message(psid, access_token, message_content):
+    """
+    Sends a message to a Facebook user via the Graph API.
+    message_content: dict matching Facebook's message object (e.g., {"text": "..."})
+    """
+    url = f"https://graph.facebook.com/v12.0/me/messages?access_token={access_token}"
+    payload = {
+        "recipient": {"id": psid},
+        "message": message_content
+    }
+    try:
+        response = requests.post(url, json=payload)
+        response.raise_for_status()
+        return response.json()
+    except Exception as e:
+        logger.error(f"Error sending message to Facebook: {e}")
+        return None
+
+def get_next_node(session, message_text):
+    """
+    Determines the next node in the flow based on user input.
+    """
+    fanpage = session.fanpage
+    
+    if not session.current_node:
+        # Start of conversation: find the default flow and its start node
+        flow = Flow.objects.filter(fanpage=fanpage, is_default=True).first()
+        if not flow:
+            flow = Flow.objects.filter(fanpage=fanpage).first()
+        
+        if flow:
+            return Node.objects.filter(flow=flow, is_start_node=True).first()
+        return None
+    
+    # We are in an active session, look for a matching edge
+    edges = Edge.objects.filter(source_node=session.current_node)
+    message_text_clean = message_text.strip().lower()
+    
+    for edge in edges:
+        if edge.condition.lower() == message_text_clean:
+            return edge.target_node
+            
+    # If no matching edge, we might want to stay at the current node or find a global start
+    # For now, let's just return the current node (re-prompting) if it was a text node,
+    # or None if we don't know what to do.
+    return session.current_node
+
+def handle_webhook_event(data):
+    """
+    Main entry point for processing Facebook webhook POST data.
+    """
+    if data.get('object') != 'page':
+        return
+        
+    for entry in data.get('entry', []):
+        for messaging_event in entry.get('messaging', []):
+            sender_id = messaging_event.get('sender', {}).get('id')
+            recipient_id = messaging_event.get('recipient', {}).get('id')
+            
+            if not sender_id or not recipient_id:
+                continue
+                
+            # 1. Identify Fanpage
+            try:
+                fanpage = Fanpage.objects.get(page_id=recipient_id, is_active=True)
+            except Fanpage.DoesNotExist:
+                logger.warning(f"Received event for unknown or inactive Page ID: {recipient_id}")
+                continue
+                
+            # 2. Extract Message
+            message_text = ""
+            if 'message' in messaging_event:
+                message_text = messaging_event['message'].get('text', "")
+            elif 'postback' in messaging_event:
+                # Handle button clicks
+                message_text = messaging_event['postback'].get('payload', "")
+                
+            if not message_text:
+                continue
+                
+            # 3. Get or Create Session
+            session, created = ChatSession.objects.get_or_create(
+                psid=sender_id,
+                fanpage=fanpage
+            )
+            
+            # 4. Log User Message
+            MessageLog.objects.create(
+                session=session,
+                sender_type='user',
+                message_text=message_text
+            )
+            
+            # 5. Determine Next Node
+            next_node = get_next_node(session, message_text)
+            
+            if next_node:
+                # 6. Send Reply
+                # next_node.content is a JSONField, expected to be {"text": "..."} or similar
+                result = send_fb_message(sender_id, fanpage.access_token, next_node.content)
+                
+                if result:
+                    # 7. Update Session
+                    session.current_node = next_node
+                    session.save()
+                    
+                    # 8. Log Bot Response
+                    bot_text = next_node.content.get('text', '[Non-text message]')
+                    MessageLog.objects.create(
+                        session=session,
+                        sender_type='bot',
+                        message_text=bot_text
+                    )

core/views.py

@@ -2,8 +2,10 @@ from django.shortcuts import render, redirect, get_object_or_404
 from django.contrib.auth.decorators import login_required
 from django.views.decorators.csrf import csrf_exempt
 from django.http import HttpResponse
+from django.utils import timezone
 import json
 from .models import Fanpage, Flow, MessageLog, ChatSession
+from .utils import handle_webhook_event
 
 def home(request):
     if request.user.is_authenticated:
@@ -16,11 +18,16 @@ def dashboard(request):
     flows = Flow.objects.all()
     recent_logs = MessageLog.objects.order_by('-timestamp')[:10]
     
+    # Count messages from today
+    today = timezone.now().date()
+    today_messages_count = MessageLog.objects.filter(timestamp__date=today).count()
+    
     context = {
         'fanpage_count': fanpages.count(),
         'flow_count': flows.count(),
         'fanpages': fanpages,
         'recent_logs': recent_logs,
+        'today_messages_count': today_messages_count,
     }
     return render(request, 'core/dashboard.html', context)
 
@@ -54,10 +61,11 @@ def webhook(request):
         # Handle incoming messages
         try:
             data = json.loads(request.body.decode('utf-8'))
-            # Process the webhook payload here in the future
-            # For now, just return 200 OK
+            # Process the webhook payload
+            handle_webhook_event(data)
             return HttpResponse('EVENT_RECEIVED')
         except Exception as e:
+            # Log the error if necessary
             return HttpResponse('Error processing request', status=400)
     
     return HttpResponse('Method not allowed', status=405)

requirements.txt

@@ -1,3 +1,4 @@
 Django==5.2.7
 mysqlclient==2.2.7
 python-dotenv==1.1.1
+requests==2.31.0