feat: add watchlist

auctions/migrations/0008_listing_favorite.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.1.5 on 2023-02-03 19:29
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('auctions', '0007_alter_comment_text_alter_listing_description'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='listing',
+            name='favorite',
+            field=models.ManyToManyField(blank=True, related_name='user_favorite', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

auctions/models.py

@@ -1,5 +1,6 @@
 from django.contrib.auth.models import AbstractUser
 from django.db import models
+from django.conf import settings
 
 
 class User(AbstractUser):
@@ -23,6 +24,7 @@ class Listing(models.Model):
     seller = models.ForeignKey(User, on_delete=models.CASCADE, related_name="listings")
     price = models.DecimalField(max_digits=8, decimal_places=2, blank=True)
     active = models.BooleanField(default=True)
+    favorite = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name="user_favorite", blank=True)
 
     def __str__(self):
         return f"{self.title}: {self.description}"

auctions/templates/auctions/layout.html

@@ -52,6 +52,11 @@ <h6>Categories</h6>
             <li class="nav-item">
                 <a class="nav-link" href="{% url 'categories' 'Other' %}">Other</a>
             </li>
+            {% if user.is_authenticated %}
+            <li class="nav-item">
+                <a class="nav-link" href="{% url 'watchlist' %}">Watchlist</a>
+            </li>
+            {% endif %}
         </ul>
         <hr>
         {% block body %}

auctions/templates/auctions/listing.html

@@ -2,9 +2,15 @@
 
 {% block body %}
     {% if user.is_authenticated %}
-        {% if listing.active and listing.seller == user %}
-            <a href="{% url 'close' listing.id %}">Close auction</a>
-        {% elif not listing.active and bidings and last_bid.buyer == user %}
+        {% if listing.active %}
+            {% if listing.seller == user %}
+                <a href="{% url 'close' listing.id %}">Close auction</a>
+            {% elif is_favorite %}
+                <a href="{% url 'favorite' listing.id %}">Remove from watchlist</a>
+            {% else %}
+                <a href="{% url 'favorite' listing.id %}">Add to watchlist</a>
+            {% endif %}
+        {% elif bidings and last_bid.buyer == user %}
             <h5>You won this auction!</h5>
         {% endif %}
     {% endif %}

auctions/templates/auctions/watchlist.html

@@ -0,0 +1,17 @@
+{% extends "auctions/layout.html" %}
+
+{% block body %}
+    <h2>Watchlist</h2>
+
+    <ul>
+        {% for listing in watchlist %}
+            <li>
+                <img src="{{ listing.photo_url }}" width="128">
+                <div>
+                    <a href="{% url 'listing' listing.id %}">{{ listing.title }}:</a>
+                    {{ listing.description }}, by {{ listing.seller }} - $ {{ listing.price }}
+                </div>
+            </li>
+        {% endfor %}
+    </ul>
+{% endblock %}

auctions/urls.py

@@ -10,5 +10,7 @@
     path("add", views.add_listing, name="add"),
     path("<int:listing_id>", views.listing, name="listing"),
     path("<int:listing_id>/close", views.close_auction, name="close"),
+    path("<int:listing_id>/favorite", views.favorite, name="favorite"),
     path("categories/<str:category>", views.categories, name="categories"),
+    path("watchlist", views.watchlist, name="watchlist"),
 ]

auctions/views.py

@@ -73,6 +73,7 @@ def listing(request, listing_id):
     bidings = auction.bidings.all()
     comments = auction.comments.all()
     user = request.user
+    is_favorite = user in auction.favorite.all()
 
     bid_form = forms.NewBid(item=auction, buyer=user)
     comment_form = forms.NewComment()
@@ -116,6 +117,7 @@ def listing(request, listing_id):
         "bid_form": bid_form,
         "comment_form": comment_form,
         "comments": comments,
+        "is_favorite": is_favorite,
     })
 
 
@@ -154,3 +156,24 @@ def categories(request, category):
         "category": category,
         "listings": Listing.objects.all()
     })
+
+
+def favorite(request, listing_id):
+    user = request.user
+
+    if user.is_authenticated:
+        auction = Listing.objects.get(id=listing_id)
+
+        if user in auction.favorite.all():
+            auction.favorite.remove(user)
+        else:
+            auction.favorite.add(user)
+
+    return HttpResponseRedirect(reverse("listing", kwargs={'listing_id': listing_id}))
+
+
+def watchlist(request):
+    return render(request, "auctions/watchlist.html", {
+        "watchlist": request.user.user_favorite.all()
+    })
+