Chore: add local mem cache and fetch gs mess details from db for footer

home/context_processors.py

@@ -1,16 +1,51 @@
-from .models import Caterer, GlobalConstants
+from django.core.cache import cache
+
+from .models import Caterer, Contact, GlobalConstants
 
 """
 File-name: context_processors.py
 Functions: base
 Used to send All Caterers Information as context in the base template
 """
 
+FOOTER_CONTACT_CACHE_KEY = "footer_contact"
+FOOTER_CONTACT_EMAIL = "gs.dining@iiti.ac.in"
+FOOTER_CONTACT_CACHE_TIMEOUT = 60 * 60 * 24  # 1 day
+_MISSING = object()
+
+
+def get_footer_contact():
+    cached = cache.get(FOOTER_CONTACT_CACHE_KEY, _MISSING)
+    if cached is not _MISSING:
+        return cached
+
+    contact = (
+        Contact.objects.filter(email__iexact=FOOTER_CONTACT_EMAIL)
+        .only("name", "occupation", "email", "contact")
+        .first()
+    )
+    data = (
+        {
+            "name": contact.name,
+            "occupation": contact.occupation,
+            "email": contact.email,
+            "phone": contact.contact,
+        }
+        if contact
+        else {}
+    )
+    cache.set(FOOTER_CONTACT_CACHE_KEY, data, FOOTER_CONTACT_CACHE_TIMEOUT)
+    return data
+
 
 def base(request):
     caterer = Caterer.objects.filter(visible=True).all()
     constants = GlobalConstants.objects.first()
     if not constants:
         # Provide defaults if no constants exist yet
         constants = GlobalConstants.objects.create()
-    return {"all_caterer": caterer, "constants": constants}
+    return {
+        "all_caterer": caterer,
+        "constants": constants,
+        "footer_contact": get_footer_contact(),
+    }

home/signals.py

@@ -1,13 +1,16 @@
 import logging
 from datetime import datetime
 
-from django.db.models.signals import post_save, pre_save
+from django.core.cache import cache
+from django.db.models.signals import post_delete, post_save, pre_save
 from django.dispatch import receiver
 
+from .context_processors import FOOTER_CONTACT_CACHE_KEY
 from .models import (
     Allocation,
     Caterer,
     CatererBills,
+    Contact,
     LongRebate,
     Period,
     Rebate,
@@ -26,6 +29,11 @@
 logger = logging.getLogger(__name__)
 
 
+@receiver([post_save, post_delete], sender=Contact)
+def invalidate_footer_contact_cache(sender, **kwargs):
+    cache.delete(FOOTER_CONTACT_CACHE_KEY)
+
+
 @receiver(post_save, sender=Student)
 def create_bill(sender, instance, created, **kwargs):
     if created:

messWebsite/settings.py

@@ -91,6 +91,13 @@
 WSGI_APPLICATION = "messWebsite.wsgi.application"
 DJANGO_ADMIN_LOGS_DELETABLE = True
 
+CACHES = {
+    "default": {
+        "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
+        "LOCATION": "mess-website",
+    }
+}
+
 # Database
 # https://docs.djangoproject.com/en/4.1/ref/settings/#databases
 

templates/base.html

@@ -127,13 +127,21 @@ <h5 class="text-uppercase mb-2 fw-bold text-white">Location :</h5>
               </div>
               <div class="col-md-4 mt-md-0 mt-4 border-footer">
                   <h5 class="text-uppercase mb-mt-4 mb-2 fw-bold text-white">Contact Us</h5>
-                  <p>Shubham Kumar (General secrotary mess cafiteria and allied services)</p>
+                  {% if footer_contact %}
+                  {% if footer_contact.name %}
+                  <p>{{ footer_contact.name }} ({{ footer_contact.occupation }})</p>
+                  {% endif %}
+                  {% if footer_contact.email %}
                   <p>
-                      <a href="mailto:dining.committee.sg@iiti.ac.in" class="text-white text-decoration-none"><i class="fas fa-envelope mr-3"></i> Mail us at:</a> gs.dining@iiti.ac.in
+                      <a href="mailto:{{ footer_contact.email }}" class="text-white text-decoration-none"><i class="fas fa-envelope mr-3"></i> Mail us at:</a> {{ footer_contact.email }}
                   </p>
+                  {% endif %}
+                  {% if footer_contact.phone %}
                   <p>
-                      <i class="fas fa-phone mr-3"></i> +91 8076229689
+                      <i class="fas fa-phone mr-3"></i> {{ footer_contact.phone }}
                   </p>
+                  {% endif %}
+                  {% endif %}
               </div>
           </div>
           <hr class="">