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import os
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from django.db import models
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from django.urls import reverse
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from django.utils import timezone
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from django.conf import settings
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from django.core.exceptions import ObjectDoesNotExist
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from django.utils.functional import cached_property
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from django.utils.text import get_valid_filename
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from personalni.models import Organizator
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import subprocess
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from reversion import revisions as reversion
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from unidecode import unidecode
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def generate_filename(self, filename):
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""" vyrobí jméno souboru podle původního jména a času nahrátí """
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clean = get_valid_filename(
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unidecode(
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filename.replace('/', '-').replace('\0', '').replace(":", "_")
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)
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)
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fname = "%s_%s" % (
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timezone.now().strftime('%Y-%m-%d-%H_%M'),
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clean)
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return os.path.join(settings.KOREKTURY_PDF_DIR, fname)
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#@reversion.register(ignore_duplicates=True)
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class KorekturovanePDF(models.Model):
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class Meta:
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ordering = ['-cas']
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db_table = 'korekturovane_cislo'
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verbose_name = u'PDF k opravám'
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verbose_name_plural = u'PDF k opravám'
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#Interní ID
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id = models.AutoField(primary_key = True)
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cas = models.DateTimeField(u'čas vložení PDF',default=timezone.now,help_text = 'Čas vložení PDF')
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nazev = models.CharField(u'název PDF',blank = False,max_length=50, help_text='Název (např. `22.1 | analyza v4` nebo `propagace | letacek v0`) korekturovaného PDF')
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komentar = models.TextField(u'komentář k PDF',blank = True, help_text='Komentář ke korekturovanému PDF (např. na co se zaměřit)')
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pdf = models.FileField(u'PDF', upload_to = generate_filename)
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orgove = models.ManyToManyField(Organizator, blank=True,
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help_text='Zodpovědní organizátoři za obsah (chodí jim maily o nových korekturách)',
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default=None)
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stran = models.IntegerField(u'počet stran', help_text='Počet stran PDF',
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default=0)
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class STATUS(models.TextChoices):
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PRIDAVANI = 'pridavani', 'Přidávání korektur'
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ZANASENI = 'zanaseni', 'Korektury jsou zanášeny'
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ZASTARALE = 'zastarale', 'Stará verze, nekorigovat'
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status = models.CharField(u'stav PDF',max_length=16, choices=STATUS.choices, blank=False, default = STATUS.PRIDAVANI)
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poslat_mail = models.BooleanField('Poslat mail o novém PDF', default=True,
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help_text='Určuje, zda se má o nově nahraném PDF poslat e-mail do mam-org. Při upravování existujícího souboru už nemá žádný vliv.',
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)
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#TODO Nepovinný foreign key k číslu
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def get_prefix(self):
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"""Vrať řetězec, ke kterému se připojí číslo a .png"""
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# vrátíme jméno souboru bez cesty
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return os.path.basename(self.pdf.file.name)
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def convert(self):
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"""Vytvoří jedno png za každou stranu pdf a uloží se"""
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dirname = os.path.join(settings.MEDIA_ROOT, settings.KOREKTURY_IMG_DIR)
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if not os.path.exists(dirname):
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os.mkdir(dirname)
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self.stran = 0
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while True:
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res = subprocess.call([
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#Parametry inspirovány chybovou hláškou imagemagicku
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"gs",
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"-sstdout=%stderr",
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"-dSAFER",
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"-dNOPAUSE",
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"-dBATCH",
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"-dNOPROMPT",
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"-sDEVICE=pngalpha",
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"-r180x180",
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"-dFirstPage=%d" % (self.stran+1),
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"-dLastPage=%d" % (self.stran+1),
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"-sOutputFile="+os.path.join(
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dirname,
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"%s-%d.png" % (self.get_prefix(), self.stran)),
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"-f%s" % (self.pdf.path)
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])
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if not os.path.exists(os.path.join(
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dirname,
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"%s-%d.png" % (self.get_prefix(), self.stran))):
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break
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self.stran += 1
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# Změnil se počet stran, ukládáme
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super(KorekturovanePDF, self).save()
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def save(self, **kwargs):
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# Pokud se nezmenilo PDF, tak nepregenerovavej nahledy
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try:
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original = KorekturovanePDF.objects.get(pk=self.pk)
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if original.pdf == self.pdf:
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super(KorekturovanePDF, self).save()
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return
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except ObjectDoesNotExist:
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pass
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# uložíme nahrávané pdf
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super(KorekturovanePDF, self).save(kwargs)
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# uložíme png a změněný počet stran
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self.convert()
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@cached_property
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def cislo_a_tema(self):
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nazev_split = self.nazev.split()
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try:
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return nazev_split[0] # + " " + nazev_split[2]
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except IndexError:
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return self.nazev
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def get_absolute_url(self):
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return reverse('korektury', kwargs={'pdf': self.id})
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@reversion.register(ignore_duplicates=True)
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class Oprava(models.Model):
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class Meta:
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db_table = 'opravy'
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verbose_name = u'Oprava'
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verbose_name_plural = u'Opravy'
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ordering = ['y','x']
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#Interní ID
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id = models.AutoField(primary_key = True)
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pdf = models.ForeignKey(KorekturovanePDF, default=-1, on_delete=models.PROTECT)
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strana = models.IntegerField(u'strana s opravou', help_text='Strana s opravou (od 0)')
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x = models.IntegerField(u'x-ová souřadnice bugu')
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y = models.IntegerField(u'y-ová souřadnice bugu')
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class STATUS(models.TextChoices):
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K_OPRAVE = 'k_oprave', 'K opravě'
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OPRAVENO = 'opraveno', 'Opraveno'
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NENI_CHYBA = 'neni_chyba', 'Není chyba'
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K_ZANESENI = 'k_zaneseni', 'K zanesení do TeXu'
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status = models.CharField(u'stav opravy',max_length=16, choices=STATUS.choices, blank=False, default = STATUS.K_OPRAVE)
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autor = models.ForeignKey(Organizator, blank = True,
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help_text='Autor opravy',
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null = True, on_delete=models.SET_NULL)
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text = models.TextField(u'text opravy',blank = True, help_text='Text opravy')
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# def __init__(self,dictionary):
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# for k,v in dictionary.items():
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# setattr(self,k,v)
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def __str__(self):
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return '{} od {}: {}'.format(self.status,self.autor,self.text)
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@reversion.register(ignore_duplicates=True)
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class Komentar(models.Model):
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class Meta:
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db_table = 'komentare'
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verbose_name = u'Komentář k opravě'
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verbose_name_plural = u'Komentáře k opravě'
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ordering = ['cas']
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#Interní ID
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id = models.AutoField(primary_key = True)
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cas = models.DateTimeField(u'čas komentáře',default=timezone.now,help_text = 'Čas zadání komentáře')
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oprava = models.ForeignKey(Oprava, on_delete=models.CASCADE)
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autor = models.ForeignKey(Organizator, blank = True,
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help_text = u'Autor komentáře',
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null = True, on_delete=models.SET_NULL)
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text = models.TextField(u'text komentáře',blank = True, help_text='Text komentáře')
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def __str__(self):
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return '{} od {}: {}'.format(self.cas,self.autor,self.text)
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