146 lines
4.0 KiB
Python
146 lines
4.0 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, pre_save
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from django.dispatch import receiver
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from django.utils.translation import gettext 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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EXPLORER_LEVELS = (
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(1, 'Newbie'),
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(2, 'Scout'),
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(3, 'Explorer'),
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(4, 'Journalist'),
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(5, 'Housekeeper')
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)
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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='explorer_favorites',
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verbose_name='Explorers favorite places',
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blank=True
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)
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visited_places = models.ManyToManyField(
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Place,
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related_name='explorer_visits',
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verbose_name='Explorers visited places',
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blank=True
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)
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level = models.IntegerField(
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default=1,
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choices=EXPLORER_LEVELS
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)
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def get_places_eligible_to_see(self):
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if self.user.is_superuser:
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return Place.objects.all()
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return Place.objects.all().filter(level__lte=self.level) | self.places.all()
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def is_eligible_to_see(self, place):
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return (
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self.user.is_superuser or
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place.submitted_by == self or
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place in self.get_places_eligible_to_see()
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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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if created:
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Explorer.objects.create(user=instance)
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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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@receiver(pre_save, sender=Explorer)
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def auto_delete_file_on_change(sender, instance, **kwargs):
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"""
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Deletes old file from filesystem
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when corresponding `Explorer` object is updated
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with new file.
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"""
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if not instance.pk:
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return False
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try:
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old_file = Explorer.objects.get(pk=instance.pk).profile_image
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except Explorer.DoesNotExist:
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return False
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new_file = instance.profile_image
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if not old_file == new_file:
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old_file.delete(save=False)
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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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