Add colored default avatars for gestalten #81

entities/migrations/0037_gestalt_avatar_color.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.7 on 2016-07-15 08:41
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import entities.models
+
+
+def set_default_colors(apps, schema_editor):
+    Gestalt = apps.get_model('entities', 'Gestalt')
+    for gestalt in Gestalt.objects.all():
+        gestalt.avatar_color = entities.models.get_random_color()
+        gestalt.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('entities', '0036_auto_20160705_0852'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='gestalt',
+            name='avatar_color',
+            field=models.CharField(default=entities.models.get_random_color, max_length=7),
+        ),
+
+        migrations.RunPython(set_default_colors),
+    ]

entities/models.py

@@ -15,6 +15,7 @@ class Gestalt(models.Model):
     about = models.TextField('Selbstauskunft', blank=True)
     addressed_content = models.ManyToManyField('content.Content', related_name='gestalten', through='GestaltContent')
     avatar = models.ImageField(blank=True)
+    avatar_color = models.CharField(max_length=7, default=get_random_color)
     background = models.ImageField('Hintergrundbild', blank=True)
     public = models.BooleanField(
             'Benutzerseite veröffentlichen',
@@ -30,6 +31,16 @@ class Gestalt(models.Model):
     def get_absolute_url(self):
         return urlresolvers.reverse('gestalt', args=[type(self).objects.get(pk=self.pk).user.username])
 
+    # FIXME: move to template filter
+    def get_initials(self):
+        import re
+        initials = ''
+        for w in str(self).split():
+            m = re.search('[a-zA-Z0-9]', w)
+            initials += m.group(0) if m else ''
+        return initials
+
+
 class GestaltContent(models.Model):
     content = models.OneToOneField('content.Content')
     gestalt = models.ForeignKey('Gestalt')

entities/templates/entities/_gestalt_avatar.html

-{% load staticfiles thumbnail %}
+{% load thumbnail %}
 <{% if link %}a href="{{ gestalt.get_absolute_url }}"{% else %}div{% endif %} class="avatar">
     {% thumbnail gestalt.avatar '100x100' format='PNG' as avatar %}
         <img src="{{ avatar.url }}" title="{{ gestalt }}" alt="{{ gestalt }}" class="avatar">
     {% empty %}
-        <img src="{% static 'avatar.png' %}" title="{{ gestalt }}" alt="{{ gestalt }}" class="avatar">
+        <span title="{{ group.name }}" class="avatar avatar-initials" data-initials="{{ gestalt.get_initials|length }}" style="background-color: {{ gestalt.avatar_color }}">
+            {{ gestalt.get_initials|truncatechars:4 }}
+        </span>
     {% endthumbnail %}
 </{% if link %}a{% else %}div{% endif %}>