fix: video pagination

apps/pages/views.py

@@ -1,8 +1,10 @@
 import random
 
 from django.db.models import Prefetch
+from django.http import Http404
 from django.http import JsonResponse
 from django.shortcuts import render
+from django.urls import reverse
 from django.views import View
 from django.views.generic import DetailView, ListView, TemplateView
 
@@ -21,6 +23,18 @@ from .models import (
     PageVideo,
 )
 
+VIDEO_PREVIEW_LIMIT = 3
+VIDEO_ARCHIVE_PAGE_SIZE = 6
+
+
+def _video_preview_context(queryset, archive_url):
+    total = queryset.count()
+    return {
+        "videos": queryset[:VIDEO_PREVIEW_LIMIT],
+        "videos_total_count": total,
+        "videos_archive_url": archive_url if total > VIDEO_PREVIEW_LIMIT else "",
+    }
+
 
 def _homepage_products_catalog_queryset():
     return (
@@ -79,10 +93,14 @@ class FAQView(ListView):
 
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data(**kwargs)
-        ctx["faq_videos"] = PageVideo.objects.filter(
+        videos = PageVideo.objects.filter(
             page=PageVideo.PAGE_FAQ,
             is_active=True,
         ).order_by("order")
+        preview = _video_preview_context(videos, reverse("pages:video_archive", kwargs={"library": PageVideo.PAGE_FAQ}))
+        ctx["faq_videos"] = preview["videos"]
+        ctx["videos_total_count"] = preview["videos_total_count"]
+        ctx["videos_archive_url"] = preview["videos_archive_url"]
         return ctx
 
 
@@ -95,16 +113,23 @@ class ContactView(View):
         return f"{a} + {b}"
 
     def get(self, request, *args, **kwargs):
+        videos = PageVideo.objects.filter(
+            page=PageVideo.PAGE_CONTACT,
+            is_active=True,
+        ).order_by("order")
+        preview = _video_preview_context(
+            videos,
+            reverse("pages:video_archive", kwargs={"library": PageVideo.PAGE_CONTACT}),
+        )
         return render(
             request,
             self.template_name,
             {
                 "form": ContactForm(),
                 "captcha_question": self._new_captcha(request),
-                "contact_videos": PageVideo.objects.filter(
-                    page=PageVideo.PAGE_CONTACT,
-                    is_active=True,
-                ).order_by("order"),
+                "contact_videos": preview["videos"],
+                "videos_total_count": preview["videos_total_count"],
+                "videos_archive_url": preview["videos_archive_url"],
             },
         )
 
@@ -168,3 +193,42 @@ class CustomPageView(DetailView):
         )
         ctx["homepage_products_catalog"] = _homepage_products_catalog_queryset()
         return ctx
+
+
+class PageVideoArchiveView(ListView):
+    model = PageVideo
+    template_name = "videos/archive.html"
+    context_object_name = "videos"
+    paginate_by = VIDEO_ARCHIVE_PAGE_SIZE
+
+    PAGE_CONFIG = {
+        PageVideo.PAGE_CONTACT: ("Contact videos", "Guides and updates from the Tecvico team.", "pages:contact"),
+        PageVideo.PAGE_FAQ: ("FAQ videos", "Video answers to common questions.", "pages:faq"),
+    }
+
+    def get_page_config(self):
+        try:
+            return self.PAGE_CONFIG[self.kwargs["library"]]
+        except KeyError as exc:
+            raise Http404("Video library not found.") from exc
+
+    def get_queryset(self):
+        self.get_page_config()
+        return PageVideo.objects.filter(
+            page=self.kwargs["library"],
+            is_active=True,
+        ).order_by("order", "pk")
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        title, description, source_url_name = self.get_page_config()
+        context.update(
+            {
+                "library_title": title,
+                "library_description": description,
+                "library_back_url": reverse(source_url_name),
+                "library_back_label": "Back to page",
+                "pagination_range": context["paginator"].get_elided_page_range(context["page_obj"].number),
+            }
+        )
+        return context