Adds shared books as a metric for recommending follows

bookwyrm/views/directory.py

@@ -1,13 +1,12 @@
 """ who all's here? """
 from django.contrib.auth.decorators import login_required
 from django.core.paginator import Paginator
-from django.db.models import Count, Q
 from django.shortcuts import redirect
 from django.template.response import TemplateResponse
 from django.views import View
 from django.utils.decorators import method_decorator
 
-from bookwyrm import models
+from .helpers import get_suggested_users
 
 # pylint: disable=no-self-use
 @method_decorator(login_required, name="dispatch")
@@ -30,21 +29,12 @@ class Directory(View):
         if scope == "local":
             filters["local"] = True
 
-        users = models.User.objects.filter(
-            discoverable=True, is_active=True, **filters
-        ).annotate(
-            mutuals=Count(
-                "following",
-                filter=Q(
-                    ~Q(id=request.user.id), following__in=request.user.following.all()
-                ),
-            )
-        )
+        users = get_suggested_users(request.user, **filters)
         sort = request.GET.get("sort")
         if sort == "recent":
             users = users.order_by("-last_active_date")
         else:
-            users = users.order_by("-mutuals", "-last_active_date")
+            users = users.order_by("-mutuals", "-shared_books", "-last_active_date")
 
         paginated = Paginator(users, 12)