forked from mirrors/bookwyrm
176 lines
4.9 KiB
Python
176 lines
4.9 KiB
Python
''' template filters '''
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from uuid import uuid4
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from datetime import datetime
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from dateutil.relativedelta import relativedelta
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from django import template
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from django.utils import timezone
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from bookwyrm import models
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register = template.Library()
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@register.filter(name='dict_key')
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def dict_key(d, k):
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''' Returns the given key from a dictionary. '''
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return d.get(k) or 0
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@register.filter(name='rating')
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def get_rating(book, user):
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''' get a user's rating of a book '''
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rating = 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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).order_by('-published_date').first()
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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='username')
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def get_user_identifier(user):
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''' use localname for local users, username for remote '''
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return user.localname if user.localname else user.username
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@register.filter(name='notification_count')
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def get_notification_count(user):
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''' how many UNREAD notifications are there '''
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return user.notification_set.filter(read=False).count()
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@register.filter(name='replies')
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def get_replies(status):
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''' get all direct replies to a status '''
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#TODO: this limit could cause problems
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return models.Status.objects.filter(
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reply_parent=status,
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deleted=False,
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).select_subclasses().all()[:10]
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@register.filter(name='parent')
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def get_parent(status):
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''' get the reply parent for a status '''
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return models.Status.objects.filter(
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id=status.reply_parent_id
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).select_subclasses().get()
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@register.filter(name='liked')
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def get_user_liked(user, status):
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''' did the given user fav a status? '''
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try:
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models.Favorite.objects.get(user=user, status=status)
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return True
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except models.Favorite.DoesNotExist:
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return False
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@register.filter(name='boosted')
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def get_user_boosted(user, status):
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''' did the given user fav a status? '''
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return user.id in status.boosters.all().values_list('user', flat=True)
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@register.filter(name='follow_request_exists')
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def follow_request_exists(user, requester):
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''' see if there is a pending follow request for a user '''
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try:
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models.UserFollowRequest.objects.filter(
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user_subject=requester,
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user_object=user,
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).get()
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return True
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except models.UserFollowRequest.DoesNotExist:
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return False
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@register.filter(name='boosted_status')
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def get_boosted(boost):
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''' load a boosted status. have to do this or it wont get foregin keys '''
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return models.Status.objects.select_subclasses().filter(
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id=boost.boosted_status.id
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).get()
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@register.filter(name='edition_info')
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def get_edition_info(book):
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''' paperback, French language, 1982 '''
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if not book:
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return ''
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items = [
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book.physical_format if isinstance(book, models.Edition) else None,
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book.languages[0] + ' language' if book.languages and \
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book.languages[0] != 'English' else None,
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str(book.published_date.year) if book.published_date else None,
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]
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return ', '.join(i for i in items if i)
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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='uuid')
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def get_uuid(identifier):
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''' for avoiding clashing ids when there are many forms '''
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return '%s%s' % (identifier, uuid4())
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@register.filter(name="post_date")
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def time_since(date):
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''' concise time ago function '''
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if not isinstance(date, datetime):
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return ''
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now = timezone.now()
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delta = now - date
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if date < (now - relativedelta(weeks=1)):
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formatter = '%b %-d'
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if date.year != now.year:
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formatter += ' %Y'
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return date.strftime(formatter)
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delta = relativedelta(now, date)
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if delta.days:
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return '%dd' % delta.days
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if delta.hours:
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return '%dh' % delta.hours
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if delta.minutes:
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return '%dm' % delta.minutes
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return '%ds' % delta.seconds
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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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shelf = models.ShelfBook.objects.filter(
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shelf__user=context['request'].user,
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book__in=book.parent_work.editions.all()
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).first()
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return shelf if shelf else {'book': book}
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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 models.ReadThrough.objects.filter(
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user=user,
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book=book
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).order_by('-start_date').first()
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@register.simple_tag(takes_context=False)
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def active_read_through(book, user):
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''' the most recent read activity '''
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return models.ReadThrough.objects.filter(
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user=user,
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book=book,
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finish_date__isnull=True
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).order_by('-start_date').first()
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