revert #86 , this is not the way to do it.

mos/settings/common.py

@@ -128,6 +128,7 @@
 HOS_NAME = 'Metalab OS'
 HOS_HOME_EVENT_NUM = 5
 HOS_WIKI_URL = '/wiki/'
+MEDIAWIKI_API = HOS_WIKI_URL + "api.php"
 HOS_ANNOUNCE_FROM = 'core@metalab.at'
 HOS_SEPA_CREDITOR_ID = 'AT12ZZZ00000000001'
 
@@ -143,3 +144,9 @@
 HOS_INTRODUCTION = True
 HOS_PROJECTS = True
 HOS_RECENT_CHANGES = True
+
+# ----------------- Jour Fixe Reminder ------------
+MOS_JF_DAYS_IN_ADVANCE = 3
+MOS_JF_DB_ID = 2 # id of events of type "Jour Fixe" in the database
+MOS_JF_SENDER = 'core@metalab.at'
+MOS_JF_RECIPIENTS = ['intern@lists.metalab.at']

mos/settings/devel.py

@@ -24,3 +24,6 @@
 MIDDLEWARE_CLASSES += ('debug_toolbar.middleware.DebugToolbarMiddleware',)
 
 HOS_SEPA_CREDITOR_ID = 'AT29HXR00000037632'
+
+HOS_WIKI_URL = "https://metalab.at/wiki/"
+MEDIAWIKI_API = HOS_WIKI_URL + "api.php"

requirements.txt

@@ -7,3 +7,4 @@ django-extensions
 python-dateutil
 freezegun
 feedparser
+requests

sources/management/commands/jour_fixe_reminder.py

@@ -0,0 +1,64 @@
+from django.core.management.base import NoArgsCommand, CommandError
+from django.conf import settings
+from django.core.exceptions import MultipleObjectsReturned, ObjectDoesNotExist
+from django.core.mail import send_mail
+from django.template.loader import get_template
+from django.template import Context
+from cal.models import Event
+import datetime, requests
+
+# TODO: does this handle timezones correctly?
+# TODO: send a warning mail to core if the next jour fixe does not have a wiki page
+
+def get_next_jf():
+    when = datetime.date.today() + datetime.timedelta(days = settings.MOS_JF_DAYS_IN_ADVANCE)
+    try:
+        # FIXME: django too old, this doesn't work yet: startDate__date = when
+        return Event.objects.get(category_id = settings.MOS_JF_DB_ID,
+                                 startDate__year  = when.year,
+                                 startDate__month = when.month,
+                                 startDate__day   = when.day)
+    except MultipleObjectsReturned as e:
+        raise e # FIXME: Ehhhhh. Multiple Jour fixes in the calendar for the same date.
+    except ObjectDoesNotExist:
+        return None
+
+def get_wiki_article(article):
+    query = {"action": "parse", "page": article, "format": "json"}
+    return requests.get(settings.MEDIAWIKI_API, params = query).json()
+
+def get_wiki_headlines(article):
+    article = get_wiki_article(article)
+    if article.get("error", False):
+        return {"article_missing": True, "error": True, "headlines": []}
+
+    results = []
+    skip = True
+    for heading in article["parse"]["sections"]:
+        if heading["toclevel"] == 1:
+            skip = heading["anchor"] != "Themen"
+            continue
+        if skip:
+            continue
+        results.append(heading["line"])
+
+    return {"article_missing": False, "error": len(results) == 0, "headlines": results}
+
+def mail(template, ctx_vars):
+    tpl = get_template(template)
+    ctx = Context(ctx_vars)
+    msg = tpl.render(ctx)
+    sub = ''.join(get_template(template + ".subject").render(ctx).splitlines())
+    send_mail(sub, msg,
+              settings.MOS_JF_SENDER,
+              settings.MOS_JF_RECIPIENTS,
+              fail_silently=False)
+
+class Command(NoArgsCommand):
+    help = 'Send the Jour Fixe reminder email, if a Jour Fixe is in settings.MOS_JF_DAYS_IN_ADVANCE days'
+    def handle_noargs(self, **options):
+        next_jf = get_next_jf()
+        if not next_jf:
+            return
+        ctx = { 'jf': next_jf, 'wiki': get_wiki_headlines(next_jf.wikiPage) }
+        mail("jour_fixe_reminder.mail", ctx)

templates/jour_fixe_reminder.mail

@@ -0,0 +1,23 @@
+{% load i18n %}{% language 'de' %}Liebe Leute,
+
+Am {{ jf.startDate | date:"l" }} den {{ jf.startDate | date:"Y-m-d" }} um {{ jf.startDate | date:"H:i" }} gibt es einen Jour Fixe.
+
+{% if wiki.article_missing %}
+Leider gibt es dazu keinen Wiki-Artikel. Das bedeutet wahrscheinlich, dass der
+Jour Fixe ausfällt. Die Deadline für neue Themen ist nämlich vorbei.
+{% elif wiki.error %}
+Leider hat der Wiki-Artikel das falsche Format und kann nicht geparst werden,
+oder es ist ein anderer Fehler beim lesen des Artikels aufgetreten. Wenn das MOS
+den Artikel nicht lesen kann, kannst du ihn sicher auch nicht lesen ;)
+Du kannst es aber versuchen.
+{% else %}Folgende Themen wurden bisher im Wiki eingetragen:
+{% for heading in wiki.headlines %}
+ * {{ heading }}{% if heading == "Thema1 (you)" %} - bitte löscht diese Boilerplate-Themen raus, wenn ihr ein Thema anlegt.{% endif %}{% endfor %}
+
+Laut einer gottgegebenen Regel müssen Jour-Fixe-Themen mindestens 3 Tage vor dem
+Termin eingetragen sein, wenn du also noch Vorschläge hast, bitte nimm sie mit
+zum nächsten Jour Fixe.
+{% endif %}
+Wiki Page: https://metalab.at/wiki/{{ jf.wikiPage }}
+
+<3 dein MOS{% endlanguage %}

templates/jour_fixe_reminder.mail.subject

@@ -0,0 +1,4 @@
+{% load i18n %}
+{% language 'de' %}
+[REMINDER] Jour Fixe am {{ jf.startDate | date:"l, Y-m-d" }}
+{% endlanguage %}