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import os
from PIL import Image
from django.db import models
from django.db.models.signals import post_save
from django.contrib.sitemaps import Sitemap
from django.dispatch import receiver
from django.urls import reverse
from django.apps import apps
from django.utils.html import format_html
from django.conf import settings
# allows for manually ordering items:
from orderable.models import Orderable
from media.utils import resize_image
from utils.util import markdown_to_html
def get_upload_path(self, filename):
return "%s/%s" % (settings.IMAGES_ROOT, filename)
class Book(Orderable):
title = models.CharField(max_length=200)
author_last_name = models.CharField(max_length=200)
author_first_name = models.CharField(max_length=200)
slug = models.CharField(max_length=50)
isbn = models.CharField(max_length=100, blank=True, null=True)
body_markdown = models.TextField(blank=True)
body_html = models.TextField(null=True, blank=True)
pages = models.CharField(max_length=5, blank=True, null=True)
amazon_link = models.CharField(max_length=400, blank=True, null=True)
bookshop_link = models.CharField(max_length=400, blank=True, null=True)
thriftbooks_link = models.CharField(max_length=400, blank=True, null=True)
other_link = models.CharField(max_length=400, blank=True, null=True)
image = models.FileField(upload_to=get_upload_path, null=True, blank=True)
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse("books:detail", kwargs={"slug": self.slug})
def get_image_url(self):
return '%sbook-covers/%s' % (settings.IMAGES_URL, self.image.name.split('/')[-1])
def get_small_image_url(self):
filename, file_extension = os.path.splitext(self.image.path)
return "%s/book-covers/%s_small%s" % (settings.IMAGES_URL, filename.split('/')[-1], file_extension)
@property
def get_previous_admin_url(self):
n = self.get_previous_by_read_date()
return reverse('admin:%s_%s_change' % (self._meta.app_label, self._meta.model_name), args=[n.id])
@property
def get_next_admin_url(self):
model = apps.get_model(app_label=self._meta.app_label, model_name=self._meta.model_name)
try:
return reverse('admin:%s_%s_change' % (self._meta.app_label, self._meta.model_name), args=[self.get_next_by_read_date().pk])
except model.DoesNotExist:
return ''
def admin_thumbnail(self):
return format_html('<img src="%s" width="100" style="width:100px" />' % (self.get_image_url()))
admin_thumbnail.short_description = 'Thumbnail'
def save(self, *args, **kwargs):
if self.body_markdown:
self.body_html = markdown_to_html(self.body_markdown)
super(Book, self).save()
@receiver(post_save, sender=Book)
def post_save_events(sender, update_fields, created, instance, **kwargs):
if instance.image:
base_path = "%s/%s/" % (settings.IMAGES_ROOT, "/".join(str(i) for i in instance.image.name.split('/')[:-1]))
filename, file_extension = os.path.splitext(instance.image.path)
img = Image.open(instance.image.path)
resize_image(img, None, 160, 78, base_path, "%s_tn%s" % (filename.split('/')[-1], file_extension))
resize_image(img, None, 650, 78, base_path, "%s_small%s" % (filename.split('/')[-1], file_extension))
class BookSitemap(Sitemap):
changefreq = "never"
priority = 0.7
protocol = "https"
def items(self):
return Book.objects.filter(is_public=True).exclude(body_markdown='')
def lastmod(self, obj):
return obj.read_date
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