mirror of
https://github.com/bookwyrm-social/bookwyrm.git
synced 2024-05-16 23:43:04 +00:00
128 lines
3.8 KiB
Python
128 lines
3.8 KiB
Python
""" template filters for really common utilities """
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import os
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import re
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from uuid import uuid4
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from urllib.parse import urlparse
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from django import template
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from django.utils.safestring import mark_safe
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from django.utils.translation import gettext_lazy as _
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from django.templatetags.static import static
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from bookwyrm.models import User
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register = template.Library()
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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 f"{identifier}{uuid4()}"
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@register.simple_tag(takes_context=False)
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def join(*args):
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"""concatenate an arbitrary set of values"""
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return "_".join(str(a) for a in args)
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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="user_from_remote_id")
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def get_user_identifier_from_remote_id(remote_id):
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"""get the local user id from their remote id"""
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user = User.objects.get(remote_id=remote_id)
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return user if user else None
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@register.filter(name="book_title")
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def get_title(book, too_short=5):
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"""display the subtitle if the title is short"""
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if not book:
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return ""
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title = book.title
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if len(title) <= too_short and book.subtitle:
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title = _("%(title)s: %(subtitle)s") % {
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"title": title,
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"subtitle": book.subtitle,
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}
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return title
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@register.simple_tag(takes_context=False)
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def comparison_bool(str1, str2, reverse=False):
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"""idk why I need to write a tag for this, it returns a bool"""
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if reverse:
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return str1 != str2
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return str1 == str2
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@register.filter(is_safe=True)
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def truncatepath(value, arg):
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"""Truncate a path by removing all directories except the first and truncating"""
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path = os.path.normpath(value.name)
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path_list = path.split(os.sep)
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try:
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length = int(arg)
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except ValueError: # invalid literal for int()
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return path_list[-1] # Fail silently.
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return f"{path_list[0]}/…{path_list[-1][-length:]}"
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@register.simple_tag(takes_context=False)
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def get_book_cover_thumbnail(book, size="medium", ext="jpg"):
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"""Returns a book thumbnail at the specified size and extension,
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with fallback if needed"""
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if size == "":
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size = "medium"
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try:
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cover_thumbnail = getattr(book, f"cover_bw_book_{size}_{ext}")
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return cover_thumbnail.url
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except OSError:
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return static("images/no_cover.jpg")
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@register.filter(name="get_isni_bio")
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def get_isni_bio(existing, author):
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"""Returns the isni bio string if an existing author has an isni listed"""
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auth_isni = re.sub(r"\D", "", str(author.isni))
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if len(existing) == 0:
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return ""
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for value in existing:
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if hasattr(value, "bio") and auth_isni == re.sub(r"\D", "", str(value.isni)):
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return mark_safe(f"Author of <em>{value.bio}</em>")
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return ""
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# pylint: disable=unused-argument
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@register.filter(name="get_isni", needs_autoescape=True)
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def get_isni(existing, author, autoescape=True):
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"""Returns the isni ID if an existing author has an ISNI listing"""
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auth_isni = re.sub(r"\D", "", str(author.isni))
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if len(existing) == 0:
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return ""
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for value in existing:
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if hasattr(value, "isni") and auth_isni == re.sub(r"\D", "", str(value.isni)):
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isni = value.isni
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return mark_safe(
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f'<input type="text" name="isni-for-{author.id}" value="{isni}" hidden>'
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)
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return ""
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@register.simple_tag(takes_context=False)
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def id_to_username(user_id):
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"""given an arbitrary user id, return the username"""
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if user_id:
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url = urlparse(user_id)
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domain = url.netloc
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parts = url.path.split("/")
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name = parts[-1]
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return f"{name}@{domain}"
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else:
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return None
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