Hide navigation bar items

If there are no games/purchases/sessions,
hide the related navbar items

CHANGELOG.md

@@ -0,0 +1,2 @@
+## Unreleased
+* Hide navigation bar items if there are no games/purchases/sessions

src/web/tracker/templates/base.html

@@ -23,9 +23,15 @@
                     <ul
                         class="flex flex-col md:flex-row p-4 mt-4 dark:text-white">
                         <li><a class="block py-2 pl-3 pr-4 hover:underline" href="{% url 'add_game' %}">New Game</a></li>
+                        {% if game_available and platform_available %}
                         <li><a class="block py-2 pl-3 pr-4 hover:underline" href="{% url 'add_purchase' %}">New Purchase</a></li>
+                        {% endif %}
+                        {% if purchase_available %}
                         <li><a class="block py-2 pl-3 pr-4 hover:underline" href="{% url 'add_session' %}">New Session</a></li>
+                        {% endif %}
+                        {% if session_count > 0 %}
                         <li><a class="block py-2 pl-3 pr-4 hover:underline" href="{% url 'list_sessions' %}">All Sessions</a></li>
+                        {% endif %}
                     </ul>
                 </div>
             </div>

src/web/tracker/views.py

@@ -3,8 +3,13 @@ from django.shortcuts import render
 from .models import Game, Platform, Purchase, Session
 from .forms import SessionForm, PurchaseForm, GameForm
 from datetime import datetime
-from django.db.models import ExpressionWrapper, F, DurationField
-import logging
+def model_counts(request):
+    return {
+        "game_available": Game.objects.count() != 0,
+        "platform_available": Platform.objects.count() != 0,
+        "purchase_available": Purchase.objects.count() != 0,
+        "session_count": Session.objects.count(),
+    }
 
 
 def add_session(request):

src/web/web/settings.py

@@ -65,6 +65,7 @@ TEMPLATES = [
                 "django.template.context_processors.request",
                 "django.contrib.auth.context_processors.auth",
                 "django.contrib.messages.context_processors.messages",
+                "tracker.views.model_counts",
             ],
         },
     },