mirror of
https://github.com/bookwyrm-social/bookwyrm.git
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130 lines
3.5 KiB
Python
130 lines
3.5 KiB
Python
""" template filters """
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from django import template
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from django.db.models import Avg
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from bookwyrm import models
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from bookwyrm.utils import cache
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from bookwyrm.views.feed import get_suggested_books
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register = template.Library()
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@register.filter(name="rating")
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def get_rating(book, user):
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"""get the overall rating of a book"""
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queryset = models.Review.privacy_filter(user).filter(
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book__parent_work__editions=book
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)
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return queryset.aggregate(Avg("rating"))["rating__avg"]
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@register.filter(name="user_rating")
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def get_user_rating(book, user):
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"""get a user's rating of a book"""
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rating = (
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models.Review.objects.filter(
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user=user,
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book=book,
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rating__isnull=False,
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deleted=False,
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)
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.order_by("-published_date")
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.first()
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)
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if rating:
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return rating.rating
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return 0
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@register.filter(name="book_description")
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def get_book_description(book):
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"""use the work's text if the book doesn't have it"""
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return book.description or book.parent_work.description
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@register.filter(name="next_shelf")
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def get_next_shelf(current_shelf):
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"""shelf you'd use to update reading progress"""
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if current_shelf == "to-read":
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return "reading"
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if current_shelf == "reading":
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return "read"
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if current_shelf == "read":
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return "complete"
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return "to-read"
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@register.filter(name="load_subclass")
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def load_subclass(status):
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"""sometimes you didn't select_subclass"""
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if hasattr(status, "quotation"):
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return status.quotation
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if hasattr(status, "review"):
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return status.review
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if hasattr(status, "comment"):
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return status.comment
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if hasattr(status, "generatednote"):
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return status.generatednote
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return status
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@register.simple_tag(takes_context=False)
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def related_status(notification):
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"""for notifications"""
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if not notification.related_status:
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return None
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return load_subclass(notification.related_status)
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@register.simple_tag(takes_context=True)
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def active_shelf(context, book):
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"""check what shelf a user has a book on, if any"""
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user = context["request"].user
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return cache.get_or_set(
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f"active_shelf-{user.id}-{book.id}",
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lambda u, b: (
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models.ShelfBook.objects.filter(
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shelf__user=u,
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book__parent_work__editions=b,
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).first()
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)
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or {"book": book},
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user,
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book,
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timeout=15552000,
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)
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@register.simple_tag(takes_context=False)
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def latest_read_through(book, user):
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"""the most recent read activity"""
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return cache.get_or_set(
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f"latest_read_through-{user.id}-{book.id}",
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lambda u, b: (
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models.ReadThrough.objects.filter(user=u, book=b, is_active=True)
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.order_by("-start_date")
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.first()
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),
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user,
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book,
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timeout=15552000,
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)
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@register.simple_tag(takes_context=True)
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def mutuals_count(context, user):
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"""how many users that you follow, follow them"""
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viewer = context["request"].user
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if not viewer.is_authenticated:
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return None
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return user.followers.filter(followers=viewer).count()
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@register.simple_tag(takes_context=True)
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def suggested_books(context):
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"""get books for suggested books panel"""
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# this happens here instead of in the view so that the template snippet can
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# be cached in the template
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return get_suggested_books(context["request"].user)
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