110 lines
3.3 KiB
Python
110 lines
3.3 KiB
Python
from logging import getLogger
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from random import SystemRandom
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from django.apps import apps
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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.translation import ugettext_lazy as _
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from six import python_2_unicode_compatible
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from dpaste import highlight
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config = apps.get_app_config('dpaste')
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logger = getLogger(__file__)
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R = SystemRandom()
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def generate_secret_id(length):
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if length > config.SLUG_LENGTH:
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logger.warning(
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'Slug creation triggered a duplicate, '
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'consider increasing the SLUG_LENGTH.'
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)
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secret_id = ''.join(
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[
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R.choice(config.SLUG_CHOICES)
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for i in range(length or config.SLUG_LENGTH)
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]
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)
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# Check if this slug already exists, if not, return this new slug
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try:
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Snippet.objects.get(secret_id=secret_id)
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except Snippet.DoesNotExist:
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return secret_id
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# Otherwise create a new slug which is +1 character longer
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# than the previous one.
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return generate_secret_id(length=length + 1)
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@python_2_unicode_compatible
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class Snippet(models.Model):
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EXPIRE_TIME = 1
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EXPIRE_KEEP = 2
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EXPIRE_ONETIME = 3
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EXPIRE_CHOICES = (
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(EXPIRE_TIME, _('Expire by timestamp')),
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(EXPIRE_KEEP, _('Keep Forever')),
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(EXPIRE_ONETIME, _('One-Time snippet')),
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)
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secret_id = models.CharField(
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_('Secret ID'), max_length=255, blank=True, null=True, unique=True
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)
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content = models.TextField(_('Content'))
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lexer = models.CharField(
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_('Lexer'), max_length=30, default=highlight.LEXER_DEFAULT
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)
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published = models.DateTimeField(_('Published'), auto_now_add=True)
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expire_type = models.PositiveSmallIntegerField(
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_('Expire Type'), choices=EXPIRE_CHOICES, default=EXPIRE_CHOICES[0][0]
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)
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expires = models.DateTimeField(_('Expires'), blank=True, null=True)
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view_count = models.PositiveIntegerField(_('View count'), default=0)
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rtl = models.BooleanField(_('Right-to-left'), default=False)
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parent = models.ForeignKey(
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'self',
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null=True,
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blank=True,
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verbose_name=_('Parent Snippet'),
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related_name='children',
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on_delete=models.CASCADE,
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)
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class Meta:
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ordering = ('-published',)
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db_table = 'dpaste_snippet'
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def __str__(self):
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return self.secret_id
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def save(self, *args, **kwargs):
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if not self.secret_id:
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self.secret_id = generate_secret_id(length=config.SLUG_LENGTH)
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super(Snippet, self).save(*args, **kwargs)
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def get_absolute_url(self):
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return reverse('snippet_details', kwargs={'snippet_id': self.secret_id})
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def highlight(self):
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HighlighterClass = highlight.get_highlighter_class(self.lexer)
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return HighlighterClass().render(
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code_string=self.content,
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lexer_name=self.lexer,
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direction='rtl' if self.rtl else 'ltr',
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)
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@property
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def lexer_name(self):
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"""Display name for this lexer."""
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return highlight.Highlighter.get_lexer_display_name(self.lexer)
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@property
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def remaining_views(self):
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if self.expire_type == self.EXPIRE_ONETIME:
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remaining = config.ONETIME_LIMIT - self.view_count
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return remaining > 0 and remaining or 0
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