mirror of
https://gitlab2.federez.net/re2o/re2o
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265 lines
8.1 KiB
Python
265 lines
8.1 KiB
Python
# -*- mode: python; coding: utf-8 -*-
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"""printer.models
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Models of the printer application
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Author : Maxime Bombar <bombar@crans.org>.
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"""
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from __future__ import unicode_literals
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from numpy.random import randint
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import unidecode
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from django.core.files.storage import FileSystemStorage
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from django.core.exceptions import ObjectDoesNotExist
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from django.db import models
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from django.forms import ValidationError
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from django.utils.translation import ugettext_lazy as _
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from django.template.defaultfilters import filesizeformat
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from re2o.mixins import RevMixin, AclMixin
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from re2o.field_permissions import FieldPermissionModelMixin
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import users.models
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from .validators import (
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FileValidator,
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)
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from .settings import (
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MAX_PRINTFILE_SIZE,
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ALLOWED_TYPES,
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PRICES,
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FORMAT_AVAILABLE,
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COLOR_CHOICES,
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DISPOSITIONS_AVAILABLE,
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STAPLING_OPTIONS,
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PERFORATION_OPTIONS,
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)
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import math
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"""
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- ```user_printing_path``` is a function that returns the path of the uploaded file, used with the FileField.
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- ```Job``` is the main model of a printer job. His parent is the ```user``` model.
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"""
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def user_printing_path(instance, filename):
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"""
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Defines the path where will be uploaded the files
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"""
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# File will be uploaded to MEDIA_ROOT/printings/user_<id>/<filename>
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return 'printings/user_{0}/{1}'.format(instance.user.id, unidecode.unidecode(filename))
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class Digicode(RevMixin, models.Model):
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"""
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This is a model to represent a digicode, maybe should be an external app.
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"""
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code = models.BigIntegerField(default=0, unique=True)
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user = models.ForeignKey('users.User', on_delete=models.PROTECT)
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created = models.DateTimeField(auto_now_add=True)
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used_time = models.DateTimeField(null=True)
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def _gen_code(user):
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try_again = True
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while try_again:
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try:
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code = randint(695895, 6958942)*1437+38
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Digicode.objects.get(code=code)
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except ObjectDoesNotExist:
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try_again = False
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digicode = Digicode.objects.create(code=code, user=user)
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digicode.save()
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return (str(code) + '#')
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class PrintOperation(RevMixin, AclMixin, models.Model):
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"""Abstract printing operation"""
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user = models.ForeignKey('users.User', on_delete=models.PROTECT)
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def can_edit(self, user_request, *args, **kwargs):
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if user_request.has_perm('printer.change_printoperation'):
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return True, None
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elif user_request == self.user:
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return True, None
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else:
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return False, _("This is not your print operation task")
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class JobWithOptions(RevMixin, AclMixin, FieldPermissionModelMixin, models.Model):
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"""
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This is the main model of printer application :
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- ```user``` is a ForeignKey to the User Application
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- ```file``` is the file to print
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- ```filename``` is the name of the file to print
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- ```starttime``` is the time when the job was launched
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- ```endtime``` is the time when the job was stopped.
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A job is stopped when it is either finished or cancelled.
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- ```status``` can be running, finished or cancelled.
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- ```club``` is blank in general. If the job was launched as a club then
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it is the id of the club.
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- ```price``` is the total price of this printing.
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Printing Options :
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- ```format``` is the paper format. Example: A4.
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- ```color``` is the colorization option. Either Color or Greyscale.
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- ```disposition``` is the paper disposition.
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- ```count``` is the number of copies to be printed.
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- ```stapling``` is the stapling options.
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- ```perforations``` is the perforation options.
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Parent class : User
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Methods:
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```_compute_price``` compute the printing price
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```_update_price``` update printing price
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"""
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STATUS_AVAILABLE = (
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('Pending', _('Pending')),
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('Printable', _('Printable')),
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('Running', _('Running')),
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('Cancelled', _('Cancelled')),
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('Finished', _('Finished'))
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)
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user = models.ForeignKey('users.User', on_delete=models.PROTECT)
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print_operation = models.ForeignKey('PrintOperation', on_delete=models.CASCADE)
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paid = models.BooleanField(default='False')
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file = models.FileField(
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storage=FileSystemStorage(location='/var/impressions'),
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upload_to=user_printing_path,
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validators=[FileValidator(
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allowed_types=ALLOWED_TYPES,
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max_size=MAX_PRINTFILE_SIZE)
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],
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verbose_name=_('File')
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)
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filename = models.CharField(
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max_length=255,
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null=True,
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verbose_name=_('File Name')
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)
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starttime = models.DateTimeField(auto_now_add=True)
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endtime = models.DateTimeField(null=True)
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status = models.CharField(
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max_length=255,
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choices=STATUS_AVAILABLE,
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verbose_name=_('Status'),
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default='Pending'
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)
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printAs = models.ForeignKey(
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'users.User',
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on_delete=models.PROTECT,
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related_name='print_as_user',
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blank=True,
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null=True,
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verbose_name=_('Print as')
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)
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price = models.DecimalField(
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max_digits=5,
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decimal_places=2,
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verbose_name=_("Price"),
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default=0.0
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)
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pages = models.IntegerField(default=0)
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format = models.CharField(
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max_length=255,
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choices=FORMAT_AVAILABLE,
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default='A4',
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verbose_name=_("Format")
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)
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color = models.CharField(
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max_length=255,
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choices=COLOR_CHOICES,
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default='Greyscale',
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verbose_name=_("Color")
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)
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disposition = models.CharField(
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max_length=255,
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choices=DISPOSITIONS_AVAILABLE,
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default='TwoSided',
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verbose_name=_("Disposition")
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)
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count = models.PositiveIntegerField(
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default=1,
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verbose_name=_("Count")
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)
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stapling = models.CharField(
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max_length=255,
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choices=STAPLING_OPTIONS,
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default='None',
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verbose_name=_("Stapling")
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)
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perforation = models.CharField(
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max_length=255,
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choices=PERFORATION_OPTIONS,
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default='None',
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verbose_name=_("Perforation")
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)
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def _update_price(self):
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self.price = self._compute_price()
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def _compute_price(self):
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pages = int(self.pages)
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price_paper = PRICES[self.format]
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price_stapling = 0.0
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nb_staples = 0
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if self.disposition == 'Booklet':
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sheets = int((pages+3)/4)
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pages = 2 * sheets
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elif self.disposition == 'TwoSided':
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sheets = int(pages/2.+0.5)
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else:
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sheets = pages
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if self.format == 'A3':
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pages*=2
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price_ink = price_paper*sheets + PRICES[self.color]*pages
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if self.stapling:
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nb_staples = 2 - int('Top' in self.stapling)
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price_stapling = nb_staples * PRICES['Staples']
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total_price = math.floor(self.count * (price_ink + price_stapling))
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return total_price/100
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def can_view(self, user_request, *args, **kwargs):
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if user_request.has_perm('printer.view_jobwithoptions'):
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return True, None
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elif user_request == self.user or user_request == self.printAs:
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return True, None
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else:
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return False, _("This is not your print job")
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def can_edit(self, user_request, *args, **kwargs):
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if user_request.has_perm('printer.change_jobwithoptions'):
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return True, None
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elif user_request == self.user or user_request == self.printAs:
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return True, None
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else:
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return False, _("This is not your print operation job")
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def __init__(self, *args, **kwargs):
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super(JobWithOptions, self).__init__(*args, **kwargs)
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self.field_permissions = {
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'printAs': self.can_change_printas,
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}
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def can_change_printas(self, user_request, *_args, **_kwargs):
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return user_request.adherent.club_members.all(), None
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def save(self, *args, **kwargs):
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self._update_price()
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super(JobWithOptions, self).save(*args, **kwargs)
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