112 lines
3.3 KiB
Python
112 lines
3.3 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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'''
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(Data)models which describe the structure of data to be saved into
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database.
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'''
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import os
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import uuid
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from django.db import models
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from django.contrib.auth.models import User
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from django.db.models.signals import post_save
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from django.dispatch import receiver
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from django.utils.translation import ugettext_lazy as _
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from lostplaces.models.abstract_models import Expireable
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from lostplaces.models.place import Place
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from easy_thumbnails.fields import ThumbnailerImageField
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from easy_thumbnails.files import get_thumbnailer
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def generate_profile_image_filename(instance, filename):
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"""
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Callback for generating filename for uploaded explorer profile images.
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Returns filename as: explorer_pk-username.jpg
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"""
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return 'explorers/' + str(instance.user.pk) + '-' + str(instance.user.username) + '.' + filename.split('.')[-1]
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class Explorer(models.Model):
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"""
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Profile that is linked to the Django user.
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Every user has a profile.
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Provides additional attributes for user profile.
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"""
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user = models.OneToOneField(
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User,
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on_delete=models.CASCADE,
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related_name='explorer'
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)
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bio = models.TextField(
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blank=True,
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null=True,
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verbose_name=_('Biography / Description'),
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help_text=_('Describe yourself, your preferences, etc. in a few sentences.')
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)
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profile_image = ThumbnailerImageField(
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blank=True,
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null=True,
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upload_to=generate_profile_image_filename,
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resize_source=dict(size=(400, 400),
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sharpen=True),
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verbose_name=_('Profile image'),
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help_text=_('Optional profile image for display in Explorer profile')
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)
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favorite_places = models.ManyToManyField(
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Place,
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related_name='favorite_places',
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verbose_name='Explorers favorite places',
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blank=True
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)
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def __str__(self):
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return self.user.username
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@receiver(post_save, sender=User)
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def create_user_profile(sender, instance, created, **kwargs):
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"""
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Delete Explorer profile when User gets deleted.
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Deletion on profile_pic update is not necessary, as it gets
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simply overwritten.
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"""
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if created:
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Explorer.objects.create(user=instance)
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def auto_delete_file_on_delete(sender, instance, **kwargs):
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"""
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Deletes file (including thumbnails) from filesystem
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when corresponding `profile_image` object is deleted.
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"""
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if instance.profile_image:
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# Get and delete all files and thumbnails from instance
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thumbmanager = get_thumbnailer(instance.profile_image)
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thumbmanager.delete(save=False)
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@receiver(post_save, sender=User)
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def save_user_profile(sender, instance, **kwargs):
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instance.explorer.save()
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class Voucher(Expireable):
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"""
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Vouchers are authorization tokens to allow the registration of new users.
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A voucher has a code, a creation and a deletion date, which are all
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positional. Creation date is being set automatically during voucher
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creation.
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created_when = models.DateTimeField(auto_now_add=True)
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expires_when = models.DateTimeField()
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"""
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code = models.CharField(unique=True, max_length=30)
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@property
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def valid(self):
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return not self.is_expired
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def __str__(self):
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return "Voucher " + str(self.code)
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