From 1928623ea8545029622e3190046515b1b9c96a05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9DNyymix=E2=80=9D?= <nyymix@gmail.com>
Date: Fri, 18 Apr 2025 20:10:41 +0300
Subject: [PATCH] Add canonical url

---
 gallery/views.py    | 33 ++++++++++++++++++++++++++++++---
 templates/base.html |  3 +++
 2 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/gallery/views.py b/gallery/views.py
index f7e7db4..4782b13 100644
--- a/gallery/views.py
+++ b/gallery/views.py
@@ -3,6 +3,7 @@ from django.core.cache import cache
 from django.core.paginator import Paginator
 from django.db.models import Count, Q, Sum
 from django.shortcuts import get_object_or_404, redirect, render
+from django.urls import reverse
 from django.views.generic import DetailView, ListView, TemplateView
 
 from .models import Album, Photo, Redir
@@ -32,6 +33,18 @@ class AlbumsList(ListView):
             cache.set(key, queryset, 60 * 5)
 
         return queryset
+    
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        page = int(self.request.GET.get('page', 1))
+
+        # Canonical_url
+        canonical_url = self.request.build_absolute_uri(reverse('gallery:albums_url'))
+        if page > 1:
+            canonical_url += f'?page={page}'
+        context['canonical_url'] = canonical_url
+        
+        return context
 
 
 class AlbumDetail(DetailView):
@@ -50,9 +63,16 @@ class AlbumDetail(DetailView):
         paginator = Paginator(photos, 30)
         page_obj = paginator.get_page(self.request.GET.get('page'))
 
+        # Canonical_url
+        page = int(self.request.GET.get('page', 1))
+        canonical_url = self.request.build_absolute_uri(self.object.get_absolute_url())
+        if page > 1:
+            canonical_url += f'?page={page}'
+
         context.update({
             'photos': page_obj.object_list,
-            'page_obj': page_obj
+            'page_obj': page_obj,
+            'canonical_url': canonical_url,
         })
         return context
 
@@ -75,6 +95,7 @@ class PhotosList(ListView):
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         context['order'] = self.request.GET.get('order', 'latest')
+        context['canonical_url'] = self.request.build_absolute_uri(reverse('gallery:photos_url'))
         return context
 
 
@@ -101,7 +122,8 @@ class PhotoDetail(DetailView):
         context = super().get_context_data(**kwargs)
         context.update({
             "next": self.object.get_next(),
-            "prev": self.object.get_prev()
+            "prev": self.object.get_prev(),
+            "canonical_url": self.request.build_absolute_uri(self.object.get_absolute_url()),
         })
         return context
 
@@ -144,7 +166,8 @@ class Search(TemplateView):
             'results': page_obj.object_list,
             'page_obj': page_obj,
             'paginator': paginator,
-            'is_paginated': page_obj.has_other_pages()
+            'is_paginated': page_obj.has_other_pages(),
+            'canonical_url': self.request.build_absolute_uri(reverse('gallery:search_url'))
         })
         return context
 
@@ -152,6 +175,10 @@ class Search(TemplateView):
 class About(TemplateView):
     """Static about page."""
     template_name = "gallery/about.html"
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context['canonical_url'] = self.request.build_absolute_uri(reverse('gallery:about_url'))
+        return context
 
 
 def redirect_to_album(request, redir_path):
diff --git a/templates/base.html b/templates/base.html
index 58e427f..c876c04 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -7,6 +7,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="description" content="{{ site_config.site_head_description }}">
     <title>{{ site_config.site_head_title }} : {% block title %}{% endblock %}</title>
+    {% if canonical_url %}
+    <link rel="canonical" href="{{ canonical_url }}">
+    {% endif %}
     <!-- UIkit CSS -->
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/uikit@3.23.6/dist/css/uikit.min.css" />
     <!-- Muistox CSS -->