class Entry(models.Model):
    LIVE_STATUS = 1
    DRAFT_STATUS = 2
    HIDDEN_STATUS = 3
    STATUS_CHOICES = (
        (LIVE_STATUS, 'Live'),
        (DRAFT_STATUS, 'Draft'),
        (HIDDEN_STATUS, 'Hidden'),
    )

    # Core fields.
    title = models.CharField(max_length=250,
                             help_text="Maximum 250 characters.")
    excerpt = models.TextField(blank=True,
                               help_text="A short summary of the entry. Optional.")
    body = models.TextField()
    pub_date = models.DateTimeField(default=datetime.datetime.now)

    # Fields to store generated HTML.
    excerpt_html = models.TextField(editable=False, blank=True)
    body_html = models.TextField(editable=False, blank=True)

    # Metadata.
    author = models.ForeignKey(User)
    enable_comments = models.BooleanField(default=True)
    featured = models.BooleanField(default=False)
    slug = models.SlugField(unique_for_date='pub_date',
                            help_text="Suggested value automatically generated from title. Must be unique for the publication date.")
    status = models.IntegerField(choices=STATUS_CHOICES, default=LIVE_STATUS,
                                 help_text="Only entries with live status will be publicly displayed.")

    # Categorization.
    categories = models.ManyToManyField(Category)
    tags = TagField(help_text="Separate tags with spaces.")



    class Meta:
        ordering = ['-pub_date']
        verbose_name_plural = "Entries"

    def __unicode__(self):
        return self.title

    def save(self, force_insert=False, force_update=False):
        self.body_html = markdown(self.body)
        if self.excerpt:
            self.excerpt_html = markdown(self.excerpt)
        super(Entry, self).save(force_insert, force_update)

    def get_absolute_url(self):
        return "/weblog/%s/%s/" % (self.pub_date.strftime("%Y/%b/%d").lower(), self.slug)