ScoDoc/app/scodoc/sco_abs_notification.py

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# -*- mode: python -*-
# -*- coding: utf-8 -*-
##############################################################################
#
# Gestion scolarite IUT
#
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# Copyright (c) 1999 - 2021 Emmanuel Viennet. All rights reserved.
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#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Emmanuel Viennet emmanuel.viennet@viennet.net
#
##############################################################################
"""Système de notification par mail des excès d'absences
(see ticket #147)
Il suffit d'appeler abs_notify() après chaque ajout d'absence.
"""
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import datetime
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from flask import g, url_for
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from flask_mail import Message
import app.scodoc.notesdb as ndb
import app.scodoc.sco_utils as scu
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from app import log
from app.scodoc.scolog import logdb
from app.scodoc import sco_etud
from app.scodoc import sco_formsemestre
from app.scodoc import sco_preferences
from app.scodoc import sco_users
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from app import email
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def abs_notify(etudid, date):
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"""Check if notifications are requested and send them
Considère le nombre d'absence dans le semestre courant
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(s'il n'y a pas de semestre courant, ne fait rien,
car l'etudiant n'est pas inscrit au moment de l'absence!).
"""
from app.scodoc import sco_abs
sem = retreive_current_formsemestre(etudid, date)
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if not sem:
return # non inscrit a la date, pas de notification
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nbabs, nbabsjust = sco_abs.get_abs_count(etudid, sem)
do_abs_notify(sem, etudid, date, nbabs, nbabsjust)
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def do_abs_notify(sem, etudid, date, nbabs, nbabsjust):
"""Given new counts of absences, check if notifications are requested and send them."""
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# prefs fallback to global pref if sem is None:
if sem:
formsemestre_id = sem["formsemestre_id"]
else:
formsemestre_id = None
prefs = sco_preferences.SemPreferences(formsemestre_id=sem["formsemestre_id"])
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destinations = abs_notify_get_destinations(
sem, prefs, etudid, date, nbabs, nbabsjust
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)
msg = abs_notification_message(sem, prefs, etudid, nbabs, nbabsjust)
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if not msg:
return # abort
# Vérification fréquence (pour ne pas envoyer de mails trop souvent)
abs_notify_max_freq = sco_preferences.get_preference("abs_notify_max_freq")
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destinations_filtered = []
for email_addr in destinations:
nbdays_since_last_notif = user_nbdays_since_last_notif(email_addr, etudid)
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if (nbdays_since_last_notif is None) or (
nbdays_since_last_notif >= abs_notify_max_freq
):
destinations_filtered.append(email_addr)
if destinations_filtered:
abs_notify_send(
destinations_filtered,
etudid,
msg,
nbabs,
nbabsjust,
formsemestre_id,
)
def abs_notify_send(destinations, etudid, msg, nbabs, nbabsjust, formsemestre_id):
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"""Actually send the notification by email, and register it in database"""
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cnx = ndb.GetDBConnexion()
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log("abs_notify: sending notification to %s" % destinations)
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cursor = cnx.cursor(cursor_factory=ndb.ScoDocCursor)
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for dest_addr in destinations:
msg.recipients = [dest_addr]
email.send_message(msg)
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ndb.SimpleQuery(
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"""INSERT into absences_notifications
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(etudid, email, nbabs, nbabsjust, formsemestre_id)
VALUES (%(etudid)s, %(email)s, %(nbabs)s, %(nbabsjust)s, %(formsemestre_id)s)
""",
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{
"etudid": etudid,
"email": dest_addr,
"nbabs": nbabs,
"nbabsjust": nbabsjust,
"formsemestre_id": formsemestre_id,
},
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cursor=cursor,
)
logdb(
cnx=cnx,
method="abs_notify",
etudid=etudid,
msg="sent to %s (nbabs=%d)" % (destinations, nbabs),
)
def abs_notify_get_destinations(sem, prefs, etudid, date, nbabs, nbabsjust):
"""Returns set of destination emails to be notified"""
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formsemestre_id = sem["formsemestre_id"]
destinations = [] # list of email address to notify
if abs_notify_is_above_threshold(etudid, nbabs, nbabsjust, formsemestre_id):
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if sem and prefs["abs_notify_respsem"]:
# notifie chaque responsable du semestre
for responsable_id in sem["responsables"]:
u = sco_users.user_info(responsable_id)
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if u["email"]:
destinations.append(u["email"])
if prefs["abs_notify_chief"] and prefs["email_chefdpt"]:
destinations.append(prefs["email_chefdpt"])
if prefs["abs_notify_email"]:
destinations.append(prefs["abs_notify_email"])
if prefs["abs_notify_etud"]:
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etud = sco_etud.get_etud_info(etudid=etudid, filled=True)[0]
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if etud["email_default"]:
destinations.append(etud["email_default"])
# Notification (à chaque fois) des resp. de modules ayant des évaluations
# à cette date
# nb: on pourrait prevoir d'utiliser un autre format de message pour ce cas
if sem and prefs["abs_notify_respeval"]:
mods = mod_with_evals_at_date(date, etudid)
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for mod in mods:
u = sco_users.user_info(mod["responsable_id"])
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if u["email"]:
destinations.append(u["email"])
# uniq
destinations = set(destinations)
return destinations
def abs_notify_is_above_threshold(etudid, nbabs, nbabsjust, formsemestre_id):
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"""True si il faut notifier les absences (indépendemment du destinataire)
nbabs: nombre d'absence (de tous types, unité de compte = demi-journée)
nbabsjust: nombre d'absences justifiées
(nbabs > abs_notify_abs_threshold)
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(nbabs - nbabs_last_notified) > abs_notify_abs_increment
"""
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abs_notify_abs_threshold = sco_preferences.get_preference(
"abs_notify_abs_threshold", formsemestre_id
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)
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abs_notify_abs_increment = sco_preferences.get_preference(
"abs_notify_abs_increment", formsemestre_id
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)
nbabs_last_notified = etud_nbabs_last_notified(etudid, formsemestre_id)
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if nbabs_last_notified == 0:
if nbabs > abs_notify_abs_threshold:
return True # first notification
else:
return False
else:
if (nbabs - nbabs_last_notified) >= abs_notify_abs_increment:
return True
return False
def etud_nbabs_last_notified(etudid, formsemestre_id=None):
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"""nbabs lors de la dernière notification envoyée pour cet étudiant dans ce semestre
ou sans semestre (ce dernier cas est nécessaire pour la transition au nouveau code)"""
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cnx = ndb.GetDBConnexion()
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cursor = cnx.cursor(cursor_factory=ndb.ScoDocCursor)
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cursor.execute(
"""select * from absences_notifications where etudid = %(etudid)s and (formsemestre_id = %(formsemestre_id)s or formsemestre_id is NULL) order by notification_date desc""",
vars(),
)
res = cursor.dictfetchone()
if res:
return res["nbabs"]
else:
return 0
def user_nbdays_since_last_notif(email_addr, etudid):
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"""nb days since last notification to this email, or None if no previous notification"""
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cnx = ndb.GetDBConnexion()
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cursor = cnx.cursor(cursor_factory=ndb.ScoDocCursor)
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cursor.execute(
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"""SELECT * FROM absences_notifications
WHERE email = %(email_addr)s and etudid=%(etudid)s
ORDER BY notification_date DESC
""",
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{"email_addr": email_addr, "etudid": etudid},
)
res = cursor.dictfetchone()
if res:
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now = datetime.datetime.now(res["notification_date"].tzinfo)
return (now - res["notification_date"]).days
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else:
return None
def abs_notification_message(sem, prefs, etudid, nbabs, nbabsjust):
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"""Mime notification message based on template.
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returns a Message instance
or None if sending should be canceled (empty template).
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"""
from app.scodoc import sco_bulletins
etud = sco_etud.get_etud_info(etudid=etudid, filled=True)[0]
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# Variables accessibles dans les balises du template: %(nom_variable)s :
values = sco_bulletins.make_context_dict(sem, etud)
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values["nbabs"] = nbabs
values["nbabsjust"] = nbabsjust
values["nbabsnonjust"] = nbabs - nbabsjust
values["url_ficheetud"] = url_for(
"scolar.ficheEtud", scodoc_dept=g.scodoc_dept, etudid=etudid
)
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template = prefs["abs_notification_mail_tmpl"]
if template:
txt = prefs["abs_notification_mail_tmpl"] % values
else:
log("abs_notification_message: empty template, not sending message")
return None
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subject = """[ScoDoc] Trop d'absences pour %(nomprenom)s""" % etud
msg = Message(subject, sender=prefs["email_from_addr"])
msg.body = txt
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return msg
def retreive_current_formsemestre(etudid, cur_date):
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"""Get formsemestre dans lequel etudid est (ou était) inscrit a la date indiquée
date est une chaine au format ISO (yyyy-mm-dd)
"""
req = """SELECT i.formsemestre_id
FROM notes_formsemestre_inscription i, notes_formsemestre sem
WHERE sem.id = i.formsemestre_id AND i.etudid = %(etudid)s
AND (%(cur_date)s >= sem.date_debut) AND (%(cur_date)s <= sem.date_fin)
"""
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r = ndb.SimpleDictFetch(req, {"etudid": etudid, "cur_date": cur_date})
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if not r:
return None
# s'il y a plusieurs semestres, prend le premier (rarissime et non significatif):
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sem = sco_formsemestre.get_formsemestre(r[0]["formsemestre_id"])
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return sem
def mod_with_evals_at_date(date_abs, etudid):
"""Liste des moduleimpls avec des evaluations à la date indiquée"""
req = """SELECT m.id AS moduleimpl_id, m.*
FROM notes_moduleimpl m, notes_evaluation e, notes_moduleimpl_inscription i
WHERE m.id = e.moduleimpl_id AND e.moduleimpl_id = i.moduleimpl_id
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AND i.etudid = %(etudid)s AND e.jour = %(date_abs)s"""
r = ndb.SimpleDictFetch(req, {"etudid": etudid, "date_abs": date_abs})
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return r