From f4a0edd091bd637459b09fa8975941656f80029c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9DNyymix=E2=80=9D?= <nyymix@gmail.com>
Date: Mon, 14 Apr 2025 10:36:06 +0300
Subject: [PATCH] Cache album cover data

---
 gallery/templatetags/image_tags.py | 44 +++++++++++++++++-------------
 1 file changed, 25 insertions(+), 19 deletions(-)

diff --git a/gallery/templatetags/image_tags.py b/gallery/templatetags/image_tags.py
index d129897..387d8ba 100644
--- a/gallery/templatetags/image_tags.py
+++ b/gallery/templatetags/image_tags.py
@@ -1,39 +1,45 @@
 from math import floor
 
 from django import template
+from django.core.cache import cache
 from django.templatetags.static import static
 
 register = template.Library()
 
 @register.filter
 def cover_image_data(album):
-    """
-    Palauttaa dictin: url, width, height, aspect_ratio.
-    Jos coveria ei ole, palauttaa placeholder-kuvan ja oletusmitat.
-    """
+
+    cache_key = f'cover_image_data_{album.pk}'
+    data = cache.get(cache_key)
+
+    if data:
+        return data
+
     photo = getattr(album, "cover", None)
     max_w, max_h = 720, 720
 
     if not photo or not photo.width or not photo.height:
-        return {
+        data = {
             "url": static("img/placeholder.png"),
             "width": 1200,
             "height": 800,
             "aspect_ratio": round(1200 / 800, 3),
         }
-
-    aspect = photo.aspect_ratio
-
-    if photo.width > photo.height:
-        w = min(photo.width, max_w)
-        h = floor(w / aspect)
     else:
-        h = min(photo.height, max_h)
-        w = floor(h * aspect)
+        aspect = photo.aspect_ratio
+        if photo.width > photo.height:
+            w = min(photo.width, max_w)
+            h = floor(w / aspect)
+        else:
+            h = min(photo.height, max_h)
+            w = floor(h * aspect)
 
-    return {
-        "url": photo.photo_md.url,
-        "width": w,
-        "height": h,
-        "aspect_ratio": round(aspect, 3),
-    }
+        data = {
+            "url": photo.photo_md.url,
+            "width": w,
+            "height": h,
+            "aspect_ratio": round(aspect, 3),
+        }
+
+    cache.set(cache_key, data, 60 * 60 * 24)
+    return data
\ No newline at end of file