отображение отдельной новости (item)

cadpoint/web/views.py

@@ -1,7 +1,8 @@
 # -*- coding: utf-8 -*-
-from django.shortcuts import render
+from django.shortcuts import render, HttpResponseRedirect
+from django.http import Http404
 from django.db.models import Q
-from datetime import datetime
+# from datetime import datetime
 from django.utils import timezone
 from web.models import TbContent
 from web.add_function import *
@@ -31,10 +32,12 @@ def handler500(request) -> render:
     return response
 
 
-def index(request) -> render:
+def index(request,
+          ppage: int = 0) -> render:
     """ Главная страница
 
     :param request:
+    :param ppage:      текущая страница ленты
     :return:  response:
     """
     template = "index.jinja2"  # шаблон
@@ -48,7 +51,7 @@ def index(request) -> render:
             "  OR web_tbcontent.tdContentPublishDown > NOW())" \
             "  AND web_tbcontent.bContentPublish " \
             "ORDER BY web_tbcontent.tdContentPublishUp DESC " \
-            "LIMIT 5 OFFSET 0"
+            "LIMIT 7 OFFSET %d" % (int(ppage) * 7, )
     q_content = TbContent.objects.raw(query)
     q_tags = TbContent.objects.raw("SELECT DISTINCT tTotalInfo.*,"
                                   "  IF (tPageInfo.NumInPage IS UNKNOWN, 0, tPageInfo.NumInPage) AS NumInPage "
@@ -75,4 +78,83 @@ def index(request) -> render:
                                   "ORDER BY tPageInfo.NumInPage DESC, tTotalInfo.name,"
                                   "         tTotalInfo.NumTotal DESC" % (query,))
     to_template.update({"LENTA": q_content, "TAGS_IN_PAGE": q_tags})
+    to_template.update({"PAGE_OF_LIST": int(ppage)})
     return render(request, template, to_template)
+
+
+def redirect_item(request,
+                  content_id: int = 0) -> render:
+    """ Переадресация URL для обеспечения переходов из поисковиков по уже проиндексированным страницам
+
+        :param request:
+        :param point:      str_id блока, в которой находится контент
+        :param item:       str_id страницы/категории, в которой находится контент
+        :param content_id: id контента которую надо отобразить
+        :return: response:
+    """
+    return HttpResponseRedirect("/item/%d-" % int(content_id))
+
+
+def show_item(request,
+              content_id: int = 0,
+              ppage: int = 0) -> render:
+    """ Формирование "ленты" о предприятии
+
+        :param request:
+        :param content_id: id контента которую надо отобразить
+        :return: response:
+    """
+    template = "item.jinja2"  # шаблон
+    to_template = {"COOKIES": check_cookies(request)}
+    try:
+        q_item = TbContent.objects.filter(id=int(content_id)).first()
+        if not q_item.bContentPublish:
+            raise Http404("Контент не опубликован")
+        to_template.update({"ITEM": q_item})
+        # query = Q(tdContentPublishDown__isnull=True)
+        # query.add(Q(tdContentPublishDown__gt=timezone.now()), Q.OR)
+        # query.add(Q(bContentPublish=True), Q.AND)
+        # query.add(Q(tdContentPublishUp__lte=q_item.tdContentPublishUp), Q.AND)
+        q_items_after = TbContent.objects.filter(
+            Q(tdContentPublishDown__isnull=True)  | Q(tdContentPublishDown__gt=timezone.now()),
+            Q(bContentPublish=True),
+            Q(tdContentPublishUp__lte=q_item.tdContentPublishUp)
+        ).order_by("-tdContentPublishUp", "id")[:4]
+        q_items_before = TbContent.objects.filter(
+            Q(tdContentPublishDown__isnull=True) | Q(tdContentPublishDown__gt=timezone.now()),
+            bContentPublish=True,
+            tdContentPublishUp__gt=q_item.tdContentPublishUp
+        ).order_by("tdContentPublishUp", "id")[:3]
+        try:
+            p = 0 if "p" not in request.GET else int(request.GET["p"])
+            n = 0 if "n" not in request.GET else int(request.GET["n"])
+            count = 0
+            for i in q_items_before:
+                count += 1
+                if n-count < 1:
+                    i.pp = p - 1
+                    i.nn = n + 7 - count
+                else:
+                    i.pp = p
+                    i.nn = n - count
+            count = 0
+            for i in q_items_after:
+                if i.id != q_item.id:
+                    count += 1
+                    if n+count <= 7:
+                        i.pp = p
+                        i.nn = n + count
+                    else:
+                        i.pp = p + 1
+                        i.nn = n+count - 7
+            to_template.update({"PER_PAGE": 7})
+            to_template.update({"PAGE": p})
+        except ValueError:
+            to_template.update({"PAGE": 0})
+            pass
+        to_template.update({"PAGE_OF_LIST": int(ppage)})
+        to_template.update({"ITEMS_AFTER": q_items_after})
+        to_template.update({"ITEMS_BEFORE": q_items_before})
+        return render(request, template, to_template)
+    except (ValueError, AttributeError, TbContent.DoesNotExist, TbContent.MultipleObjectsReturned):
+        raise Http404("Контента с таким id не существует")