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1 """
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2 Models for the smiley application.
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3 """
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4 from django.db import models
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5 from django.core.cache import cache
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6
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7 CACHE_TIMEOUT = 60 * 60 # seconds
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8
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9
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10 class SmileyManager(models.Manager):
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11
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12 def get_smiley_map(self):
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13 """
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14 Returns a dictionary of 2-tuples, indexed by smiley codes.
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15 Element 0 of the tuple is the HTML representation of the smiley,
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16 and element 1 is the markdown version.
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17 The dictionary is cached.
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18 """
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19 map = cache.get('smiley_map')
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20 if map:
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21 return map
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22
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23 map = dict((s.code, (s.html(), s.markdown())) for s in self.all())
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24 cache.set('smiley_map', map, CACHE_TIMEOUT)
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25 return map
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26
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27 def get_smilies(self, extra=False):
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28 key = 'smileys' if not extra else 'smileys_extra'
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29 smilies = cache.get(key)
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30 if smilies:
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31 return smilies
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32
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33 smilies = self.filter(is_extra=extra)
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34 cache.set(key, smilies, CACHE_TIMEOUT)
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35 return smilies
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36
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37
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38 class Smiley(models.Model):
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39 image = models.ImageField(upload_to='smiley/images/')
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40 title = models.CharField(max_length=32)
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41 code = models.CharField(max_length=32)
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42 is_extra = models.BooleanField()
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43
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44 objects = SmileyManager()
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45
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46 class Meta:
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47 verbose_name_plural = 'Smilies'
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48 ordering = ('title', )
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49
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50 def __unicode__(self):
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51 return self.title
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52
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53 def get_absolute_url(self):
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54 return self.image.url
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55
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56 def html(self):
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57 """Returns a HTML img tag representation of the smiley."""
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58 if self.image:
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59 return (u'<img src="%s" alt="%s" title="%s" />' %
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60 (self.get_absolute_url(), self.title, self.title))
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61 return u''
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62 html.allow_tags = True
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63
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64 def markdown(self):
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65 """Returns a markdown representation of the smiley."""
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66 if self.image:
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67 return (u'' %
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68 (self.title, self.get_absolute_url(), self.title))
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69 return u''
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