--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hdalab/signals.py	Sun Mar 08 14:53:52 2015 +0100
@@ -0,0 +1,88 @@
+# -*- coding: utf-8 -*-
+'''
+Created on Mar 8, 2015
+
+@author: ymh
+'''
+import logging
+
+from django.conf import settings
+from django.core.mail.message import EmailMultiAlternatives
+from django.db.models.signals import post_save, pre_delete
+from django.template.base import TemplateDoesNotExist
+from django.template.loader import render_to_string
+from django.utils.html import strip_tags
+
+from hdalab.models.renkan import HdalabRenkan, HdalabRenkanStateTransition
+from renkanmanager.models import Renkan
+
+
+logger = logging.getLogger(__name__)
+
+MAIL_TEMPLATES = {
+    (HdalabRenkan.MODERATED,HdalabRenkan.PUBLISHED): ("mails/published_renkan", "Renkan publié"),
+    (HdalabRenkan.MODERATED,HdalabRenkan.REJECTED): ("mails/rejected_renkan", "Renkan rejeté"),
+    (HdalabRenkan.PUBLISHED, HdalabRenkan.EDITION): ("mails/unpublished_renkan", "Renkan dépublié"),
+}
+
+
+#TODO put into queue
+def send_renkan_moderation_messages(sender, **kwargs):
+    renkan_state = kwargs.get('instance', None)
+    if not renkan_state or (renkan_state.from_state,renkan_state.to_state) not in MAIL_TEMPLATES:
+        return
+
+    template_key = (renkan_state.from_state,renkan_state.to_state)
+    msg_txt = ""
+    msg_html = ""
+    subject = ""
+    try:
+        template_name, subject = MAIL_TEMPLATES[template_key]
+#        template = loader.get_template(template_name)
+        context = {'renkan_state': renkan_state, 'WEB_URL': settings.WEB_URL}
+        msg_html = render_to_string(template_name+".txt", context)
+        msg_txt = render_to_string(template_name+".html", context)
+    except TemplateDoesNotExist:
+        logger.error("Mail template %s for state %s not found", MAIL_TEMPLATES[template_key], HdalabRenkan.STATE_CHOICES_DICT[renkan_state.to_state])
+        return
+    except Exception as e:
+        logger.error("Error rendering template %s for state %s : %r", MAIL_TEMPLATES[template_key], HdalabRenkan.STATE_CHOICES_DICT[renkan_state.to_state], e)
+    
+    if msg_txt and msg_html and renkan_state.renkan and renkan_state.renkan.renkan and renkan_state.renkan.renkan.owner and renkan_state.renkan.renkan.owner.email:
+        logger.debug("Sending following mail to %s : %s", renkan_state.renkan.renkan.owner.email, msg_txt)
+        emsg = EmailMultiAlternatives(subject, strip_tags(msg_txt), settings.DEFAULT_FROM_EMAIL, [renkan_state.renkan.renkan.owner.email])
+        emsg.attach_alternative(msg_html, "text/html")
+        emsg.send(fail_silently=True)
+
+
+def queue_renkan_rendering(sender, **kwargs):
+    renkan_state = kwargs.get('instance', None)
+    if not renkan_state:
+        return
+    
+    if renkan_state.from_state == HdalabRenkan.PUBLISHED and renkan_state.renkan.renkan.image != settings.DEFAULT_RENKAN_ICON:
+        if renkan_state.renkan.renkan.image:
+            renkan_state.renkan.renkan.image.delete(False)
+            renkan_state.renkan.renkan.image.delete_thumbnails()
+        renkan_state.renkan.renkan.image = settings.DEFAULT_RENKAN_ICON
+        renkan_state.renkan.renkan.save()
+    elif renkan_state.to_state == HdalabRenkan.PUBLISHED:
+        from hdalab.tasks import capture_preview
+        capture_preview.delay(renkan_state.renkan.renkan.rk_id)  # @UndefinedVariable
+
+def renkan_delete_image(sender, **kwargs):
+    renkan = kwargs.get('instance', None)
+    if not renkan or not renkan.image or renkan.image == settings.DEFAULT_RENKAN_ICON:
+        return
+    renkan.image.delete(False)
+    renkan.image.delete_thumbnails()
+
+    
+RENKAN_MODERATION_UUID = "e2f84503-609b-4efa-819d-908e2efe7b1b"
+RENKAN_RENDERING_UUID = "b8830748-be2b-479a-8aef-c8d952437b2f"
+RENKAN_DELETE_UUID = "09c23ca2-4d59-4c29-b94a-2c2672d5a89b"
+
+post_save.connect(send_renkan_moderation_messages, sender=HdalabRenkanStateTransition, dispatch_uid=RENKAN_MODERATION_UUID)
+post_save.connect(queue_renkan_rendering, sender=HdalabRenkanStateTransition, dispatch_uid=RENKAN_RENDERING_UUID)
+pre_delete.connect(renkan_delete_image, sender=Renkan, dispatch_uid=RENKAN_DELETE_UUID)
+