From 1777656d27db2b06e48cfe7e440381128921ded8 Mon Sep 17 00:00:00 2001
From: "Bc. Petr Pecha" <nejlepsitextovyeditorjevim@gmail.com>
Date: Thu, 25 Jun 2015 10:48:06 +0200
Subject: [PATCH] Organizator | model

---
 seminar/models.py | 69 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/seminar/models.py b/seminar/models.py
index 04890ef9..c731fa4c 100644
--- a/seminar/models.py
+++ b/seminar/models.py
@@ -12,6 +12,10 @@ from django.utils.text import slugify
 from django.core.urlresolvers import reverse
 from django.core.cache import cache
 
+from PIL import Image
+import os
+from cStringIO import StringIO
+from django.core.files.base import ContentFile
 
 from django_countries.fields import CountryField
 from solo.models import SingletonModel
@@ -637,3 +641,68 @@ class Novinky(models.Model):
         verbose_name = 'Novinka'
         verbose_name_plural = 'Novinky'
 
+
+@python_2_unicode_compatible
+class Organizator(models.Model):
+    user = models.OneToOneField(settings.AUTH_USER_MODEL, verbose_name='Osoba',
+            help_text = 'Vyber účet spřažený s organizátorem.')
+    prezdivka = models.CharField('Přezdívka', max_length = 32,
+            null = True, blank = True)
+    organizuje_od_roku = models.IntegerField('Organizuje od roku',
+            null = True, blank = True)
+    organizuje_do_roku = models.IntegerField('Organizuje do roku',
+            null = True, blank = True)
+    studuje = models.CharField('Studuje', max_length = 256,
+            null = True, blank = True)
+    strucny_popis_organizatora = models.TextField('Stručný popis organizátora',
+            null = True, blank = True)
+    foto = models.ImageField('Fotografie organizátora',
+            upload_to='image_organizatori/%Y/', null = True, blank = True,
+            help_text = 'Vlož fotografii organizátora o libovoné velikosti')
+    foto_male = models.ImageField(upload_to='image_organizatori/male/%Y/',
+            null = True, blank = True, editable = False)
+
+    def __str__(self):
+        return str(self.user)
+
+    class Meta:
+        verbose_name = 'Organizátor'
+        verbose_name_plural = 'Organizátoři'
+
+    def save(self):
+        original = Image.open(self.foto)
+        jmeno = os.path.basename(self.foto.file.name)
+        Organizator._vyrobMiniaturu(original, jmeno, 500, self.foto)
+        Organizator._vyrobMiniaturu(original, jmeno, 200, self.foto_male)
+        super(Organizator, self).save()
+
+    @staticmethod
+    def _vyrobMiniaturu(original, jmeno, maximum, field):
+        zmensenina = Organizator._zmensiObrazek(original, maximum)
+        f = StringIO()
+        try:
+            zmensenina.save(f, format=original.format)
+            data = ContentFile(f.getvalue())
+        finally:
+            f.close()
+        field.save(jmeno, data, save = False)
+            
+    @staticmethod
+    def _zmensiObrazek(original, maximum):
+        """Preskaluje obrazek tak, aby byl zachovan pomer stran
+        a zadny rozmer nepresahoval maxRozmer. Pokud zadny rozmer
+        nepresahuje maxRozmer, tak vrati puvodni obrazek
+        (tj. nedojde ke zvetseni obrazku)."""
+        novaVelikost = Organizator._zmensiVelikost(original.size, maximum)
+        return original.resize(novaVelikost, Image.ANTIALIAS)
+
+    @staticmethod
+    def _zmensiVelikost(velikost, maximum):
+        maximum = float(maximum)
+        w, h = velikost
+        soucasneMaximum = max(w, h)
+        if soucasneMaximum <= maximum:
+            return velikost
+        pomer = maximum/soucasneMaximum
+        return (int(w * pomer), int(h * pomer))
+