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from django.db import models


class Tag(models.Model):
    """Represents a tag"""
    name = models.CharField(max_length=100, unique=True)

    def __unicode__(self):
        return self.name


class Photo(models.Model):
    """Represents a photograph"""
    url = models.URLField()
    caption = models.TextField(blank=True, null=True)
    height = models.PositiveIntegerField(blank=True, null=True)
    width = models.PositiveIntegerField(blank=True, null=True)

    def __unicode__(self):
        return self.url


class Tumblr(models.Model):
    """Represent a Tumblr item"""
    url = models.URLField(unique=True)
    blog_name = models.CharField(max_length=100)
    date = models.DateTimeField()
    body = models.TextField()
    caption = models.TextField()
    text = models.TextField()
    source = models.CharField(max_length=100)
    tags = models.ManyToManyField(Tag)
    photos = models.ManyToManyField(Photo)

    class Meta:
        ordering = ("-date",)

    def __unicode__(self):
        return self.body[0:100]


class Twitter(models.Model):
    """Represents a Twitter item"""
    url = models.URLField(unique=True)
    user = models.CharField(max_length=100)
    screen_name = models.CharField(max_length=100)
    date = models.DateTimeField()
    text = models.TextField()
    photos = models.ManyToManyField(Photo)

    class Meta:
        ordering = ("-date",)

    def __unicode__(self):
        return self.text