def listing(request, listing_id):
listing = Listing.objects.get(pk=listing_id)
IsWatchlist = request.user in listing.watchlist.all()
allComments = Comment.objects.filter(listing=listing)
return render(request, "auctions/listing.html", {
"listing": listing,
"ItemisinIsWatchlist": IsWatchlist,
"allComments":allComments
})
@login_required   
def addwatchlist(request, id):
listingData = Listing.objects.get(pk= id)
current_user= request.user
listingData.watchlist.add(current_user)
return HttpResponseRedirect(reverse("listing", args=(id, )))
@login_required
def removewatchlist(request, id):
listingData = Listing.objects.get(pk= id)    
current_user= request.user
listingData.watchlist.remove(current_user)
return HttpResponseRedirect(reverse("listing", args=(id, )))
def addComment(request, id):
currentUser = request.user
listingData = Listing.objects.get(pk=id)
message = request.POST["newComment"]
newComment = Comment(
author = currentUser,
listing = listingData,
message = message
)
newComment.save()
return HttpResponseRedirect(reverse("listing", args=(id, )))
@login_required
def AddBid(request, id):
listingBid = Listing.objects.get(pk=id)
newBid = request.POST["newBid"]
if int(newBid) > listingBid.bid.bid:
updateBid= Bid(bid=int(newBid), user=request.user)
updateBid.save()
listingBid.bid.bid = int(newBid)
listingBid.save()
return render(request, "auctions/listing.html")
else:
return render(request, "auctions/listing.html")

{% if user.is_authenticated %}     
<p>
{% if ItemisinIsWatchlist %}
<form action="{% url 'removewatchlist' id=listing.id %}" method="post">
{% csrf_token %}
<button type="submit" class="btn btn-danger">Remove from watchlist</button>
</form>
{% else %}
{% if listing.id %}
<form action="{% url 'addwatchlist' id=listing.id %}" method="post">
{% csrf_token %}
<button type="submit" class="btn btn-success">Add to watchlist</button>
</form>
{% else %}
<p>No listing ID available.</p>
{% endif %}
{% endif %}
</p>
<p>
{% if listing.id %} 
<h2>Bids</h2>
<form action="{% url 'AddBid' id=listing.id %}" method="POST">
{% csrf_token %} 
<input type="number" min="0" name="newBid" placeholder="Add new Bid">
<button type="submit" class="btn btn-primary">Submit</button>
</form>
{% else %}
<p>No listing ID available.</p>
</p>
{% endif %}
{% endif %}
<p class="card-text"><small class="text-muted">Publisher: {{listing.publisher}}</small></p>
</div>
</div>
<p class="row mx-3">
<h2>Comments</h2>
<br>
{% if user.is_authenticated %}
<form action="{% url 'addComment' id=listing.id %}" method="POST">
{% csrf_token %} 
<input type="textarea" name="newComment" placeholder="Add new comment">
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</p>
{% endif %}
<br/>
<ul class="list-group">
{% for comment in allComments %}
<li class="list-group-item" >{{comment.message}}</li>
<li class="list-group-item" > Posted by: {{comment.author}}</li>
{% endfor %}
</ul>
{% endblock %}

urlpatterns = [
path("", views.index, name="index"),
path("login", views.login_view, name="login"),
path("logout", views.logout_view, name="logout"),
path("register", views.register, name="register"),
path('create', views.create, name="create"),
path("<int:listing_id>", views.listing, name="listing"),
path("removewatchlist/<int:id>", views.removewatchlist, name="removewatchlist"),
path("addwatchlist/<int:id>", views.addwatchlist, name="addwatchlist"),
path("watchlist", views.watchlist, name="watchlist"),
path("addComment/<int:id>", views.addComment, name="addComment"),
path("AddBid/<int:id>", views.AddBid, name="AddBid")
]

context = {
'listing': listingBid
}
return render(request, "auctions/listing.html", context)