med/users/views.py

# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2017-2019 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later

from django.contrib import messages
from django.contrib.auth.decorators import login_required, permission_required
from django.core.mail import send_mail
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from django.core.urlresolvers import reverse
from django.db import IntegrityError
from django.db import transaction
from django.shortcuts import get_object_or_404, render, redirect
from django.template import loader
from django.template.context_processors import csrf
from django.utils import timezone
from reversion import revisions as reversion
from reversion.models import Version

from med.settings import REQ_EXPIRE_STR, EMAIL_FROM, ASSO_NAME, ASSO_EMAIL, SITE_NAME, PAGINATION_NUMBER
from media.models import Emprunt
from users.decorators import user_is_in_campus
from users.forms import InfoForm, BaseInfoForm, AdhesionForm
from users.forms import PassForm
from users.forms import RightForm, DelRightForm
from users.models import User, Request, ListRight, Right, Clef, Adhesion


def form(ctx, template, request):
    c = ctx
    c.update(csrf(request))
    return render(request, template, c)


def password_change_action(u_form, user, request, req=False):
    """ Fonction qui effectue le changeemnt de mdp bdd"""
    if u_form.cleaned_data['passwd1'] != u_form.cleaned_data['passwd2']:
        messages.error(request, "Les 2 mots de passe différent")
        return form({'userform': u_form}, 'users/user.html', request)
    user.set_password(u_form.cleaned_data['passwd1'])
    with transaction.atomic(), reversion.create_revision():
        user.save()
        reversion.set_comment("Réinitialisation du mot de passe")
    messages.success(request, "Le mot de passe a changé")
    if req:
        req.delete()
        return redirect("/")
    return redirect("/users/profil/" + str(user.id))


def reset_passwd_mail(req, request):
    """ Prend en argument un request, envoie un mail de réinitialisation de mot de pass """
    t = loader.get_template('users/email_passwd_request')
    c = {
        'name': str(req.user.first_name) + ' ' + str(req.user.last_name),
        'asso': ASSO_NAME,
        'asso_mail': ASSO_EMAIL,
        'site_name': SITE_NAME,
        'url': request.build_absolute_uri(
            reverse('users:process', kwargs={'token': req.token})),
        'expire_in': REQ_EXPIRE_STR,
    }
    send_mail('Votre compte %s' % SITE_NAME, t.render(c),
              EMAIL_FROM, [req.user.email], fail_silently=False)
    return


@login_required
@permission_required('bureau')
def new_user(request):
    """ Vue de création d'un nouvel utilisateur, envoie un mail pour le mot de passe"""
    user = BaseInfoForm(request.POST or None)
    if user.is_valid():
        user = user.save(commit=False)
        with transaction.atomic(), reversion.create_revision():
            user.save()
            reversion.set_comment("Création")
        req = Request()
        req.type = Request.PASSWD
        req.user = user
        req.save()
        reset_passwd_mail(req, request)
        messages.success(request,
                         "L'utilisateur %s a été crée, un mail pour l'initialisation du mot de passe a été envoyé" % user.username)
        return redirect("/users/profil/" + str(user.id))
    return form({'userform': user}, 'users/user.html', request)


@login_required
def edit_info(request, userid):
    """ Edite un utilisateur à partir de son id, si l'id est différent de request.user, vérifie la possession du droit admin """
    try:
        user = User.objects.get(pk=userid)
    except User.DoesNotExist:
        messages.error(request, "Utilisateur inexistant")
        return redirect("/users/")
    if not request.user.has_perms(('bureau',)) and user != request.user:
        messages.error(request, "Vous ne pouvez pas modifier un autre user que vous sans droit admin")
        return redirect("/users/profil/" + str(request.user.id))
    if not request.user.has_perms(('bureau',)):
        user = BaseInfoForm(request.POST or None, instance=user)
    else:
        user = InfoForm(request.POST or None, instance=user)
    if user.is_valid():
        with transaction.atomic(), reversion.create_revision():
            user.save()
            reversion.set_user(request.user)
            reversion.set_comment("Champs modifié(s) : %s" % ', '.join(field for field in user.changed_data))
        messages.success(request, "L'user a bien été modifié")
        return redirect("/users/profil/" + userid)
    return form({'userform': user}, 'users/user.html', request)


@login_required
def password(request, userid):
    """ Reinitialisation d'un mot de passe à partir de l'userid,
    pour self par défaut, pour tous sans droit si droit admin,
    pour tous si droit bureau """
    try:
        user = User.objects.get(pk=userid)
    except User.DoesNotExist:
        messages.error(request, "Utilisateur inexistant")
        return redirect("/users/")
    if not request.user.has_perms(('bureau',)) and user != request.user:
        messages.error(request, "Vous ne pouvez pas modifier un autre user que vous sans droit admin")
        return redirect("/users/profil/" + str(request.user.id))
    u_form = PassForm(request.POST or None)
    if u_form.is_valid():
        return password_change_action(u_form, user, request)
    return form({'userform': u_form}, 'users/user.html', request)


@login_required
@permission_required('bureau')
def add_right(request, userid):
    """ Ajout d'un droit à un user, need droit bureau """
    try:
        user = User.objects.get(pk=userid)
    except User.DoesNotExist:
        messages.error(request, "Utilisateur inexistant")
        return redirect("/users/")
    right = RightForm(request.POST or None)
    if right.is_valid():
        right = right.save(commit=False)
        right.user = user
        try:
            with transaction.atomic(), reversion.create_revision():
                reversion.set_user(request.user)
                reversion.set_comment("Ajout du droit %s" % right.right)
                right.save()
            messages.success(request, "Droit ajouté")
        except IntegrityError:
            pass
        return redirect("/users/profil/" + userid)
    return form({'userform': right}, 'users/user.html', request)


@login_required
@permission_required('bureau')
def del_right(request):
    """ Supprimer un droit à un user, need droit bureau """
    user_right_list = dict()
    for right in ListRight.objects.all():
        user_right_list[right] = DelRightForm(right, request.POST or None)
    for keys, right_item in user_right_list.items():
        if right_item.is_valid():
            right_del = right_item.cleaned_data['rights']
            with transaction.atomic(), reversion.create_revision():
                reversion.set_user(request.user)
                reversion.set_comment(
                    "Retrait des droit %s" % ','.join(str(deleted_right) for deleted_right in right_del))
                right_del.delete()
            messages.success(request, "Droit retiré avec succès")
            return redirect("/users/")
    return form({'userform': user_right_list}, 'users/del_right.html', request)


@user_is_in_campus
def index_clef(request):
    clef_list = Clef.objects.all().order_by('nom')
    return render(request, 'users/index_clef.html', {'clef_list': clef_list})


@login_required
@permission_required('bureau')
def add_adhesion(request):
    adhesion = AdhesionForm(request.POST or None)
    if adhesion.is_valid():
        with transaction.atomic(), reversion.create_revision():
            adhesion.save()
            reversion.set_user(request.user)
            reversion.set_comment("Création")
        messages.success(request, "L'adhesion a été ajouté")
        return redirect("/users/index_adhesion/")
    return form({'userform': adhesion}, 'users/user.html', request)


@login_required
@permission_required('bureau')
def edit_adhesion(request, adhesionid):
    try:
        adhesion_instance = Adhesion.objects.get(pk=adhesionid)
    except Adhesion.DoesNotExist:
        messages.error(request, u"Entrée inexistante")
        return redirect("/users/index_adhesion/")
    adhesion = AdhesionForm(request.POST or None, instance=adhesion_instance)
    if adhesion.is_valid():
        with transaction.atomic(), reversion.create_revision():
            adhesion.save()
            reversion.set_user(request.user)
            reversion.set_comment("Champs modifié(s) : %s" % ', '.join(field for field in adhesion.changed_data))
        messages.success(request, "Adhesion modifiée")
        return redirect("/users/index_adhesion/")
    return form({'userform': adhesion}, 'users/user.html', request)


@login_required
@permission_required('bureau')
def del_adhesion(request, adhesionid):
    try:
        adhesion_instance = Adhesion.objects.get(pk=adhesionid)
    except Adhesion.DoesNotExist:
        messages.error(request, u"Entrée inexistante")
        return redirect("/users/index_adhesion/")
    if request.method == "POST":
        with transaction.atomic(), reversion.create_revision():
            adhesion_instance.delete()
            reversion.set_user(request.user)
            messages.success(request, "La adhesion a été détruit")
        return redirect("/users/index_adhesion")
    return form({'objet': adhesion_instance, 'objet_name': 'adhesion'}, 'users/delete.html', request)


@login_required
def index_adhesion(request):
    adhesion_list = Adhesion.objects.all()
    return render(request, 'users/index_adhesion.html', {'adhesion_list': adhesion_list})


@login_required
@permission_required('perm')
def index(request):
    """ Affiche l'ensemble des users, need droit admin """
    users_list = User.objects.order_by('first_name')
    paginator = Paginator(users_list, PAGINATION_NUMBER)
    page = request.GET.get('page')
    try:
        users_list = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer, deliver first page.
        users_list = paginator.page(1)
    except EmptyPage:
        # If page is out of range (e.g. 9999), deliver last page of results.
        users_list = paginator.page(paginator.num_pages)
    return render(request, 'users/index.html', {'users_list': users_list})


@login_required
@permission_required('perm')
def index_ajour(request):
    """ Affiche l'ensemble des users, need droit admin """
    users_list = Adhesion.objects.all().order_by('annee_debut').reverse().first().adherent.all().order_by('first_name')
    paginator = Paginator(users_list, PAGINATION_NUMBER)
    page = request.GET.get('page')
    try:
        users_list = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer, deliver first page.
        users_list = paginator.page(1)
    except EmptyPage:
        # If page is out of range (e.g. 9999), deliver last page of results.
        users_list = paginator.page(paginator.num_pages)
    return render(request, 'users/index.html', {'users_list': users_list})


@user_is_in_campus
def history(request, object, id):
    """ Affichage de l'historique : (acl, argument)
    user : self, userid"""
    if object == 'clef':
        try:
            object_instance = Clef.objects.get(pk=id)
        except Clef.DoesNotExist:
            messages.error(request, "Utilisateur inexistant")
            return redirect("/users/")
    elif not request.user.is_authenticated:
        messages.error(request, "Permission denied")
        return redirect("/users/")
    if object == 'user':
        try:
            object_instance = User.objects.get(pk=id)
        except User.DoesNotExist:
            messages.error(request, "Utilisateur inexistant")
            return redirect("/users/")
        if not request.user.has_perms(('perm',)) and object_instance != request.user:
            messages.error(request,
                           "Vous ne pouvez pas afficher l'historique d'un autre user que vous sans droit admin")
            return redirect("/users/profil/" + str(request.user.id))
    elif object == 'clef':
        try:
            object_instance = Clef.objects.get(pk=id)
        except Clef.DoesNotExist:
            messages.error(request, "Utilisateur inexistant")
            return redirect("/users/")
    elif object == 'adhesion':
        try:
            object_instance = Adhesion.objects.get(pk=id)
        except Adhesion.DoesNotExist:
            messages.error(request, "Utilisateur inexistant")
            return redirect("/users/")
    else:
        messages.error(request, "Objet  inconnu")
        return redirect("/users/")
    reversions = Version.objects.get_for_object(object_instance)
    paginator = Paginator(reversions, PAGINATION_NUMBER)
    page = request.GET.get('page')
    try:
        reversions = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer, deliver first page.
        reversions = paginator.page(1)
    except EmptyPage:
        # If page is out of range (e.g. 9999), deliver last page of results.
        reversions = paginator.page(paginator.num_pages)
    return render(request, 'med/history.html', {'reversions': reversions, 'object': object_instance})


@login_required
def mon_profil(request):
    return redirect("/users/profil/" + str(request.user.id))


@login_required
def profil(request, userid):
    try:
        users = User.objects.get(pk=userid)
    except User.DoesNotExist:
        messages.error(request, "Utilisateur inexistant")
        return redirect("/users/")
    if not request.user.has_perms(('perm',)) and users != request.user:
        messages.error(request, "Vous ne pouvez pas afficher un autre user que vous sans droit perm")
        return redirect("/users/profil/" + str(request.user.id))
    emprunts_list = Emprunt.objects.filter(user=users)
    list_droits = Right.objects.filter(user=users)
    return render(
        request,
        'users/profil.html',
        {
            'user': users,
            'emprunts_list': emprunts_list,
            'list_droits': list_droits,
        }
    )


@login_required
@permission_required('bureau')
def adherer(request, userid):
    try:
        users = User.objects.get(pk=userid)
    except User.DoesNotExist:
        messages.error(request, "Utilisateur inexistant")
        return redirect("/users/")
    adh_annee = Adhesion.objects.all().order_by('annee_debut').reverse().first()
    with transaction.atomic(), reversion.create_revision():
        reversion.set_user(request.user)
        adh_annee.adherent.add(users)
        adh_annee.save()
        reversion.set_comment("Adhesion de %s" % users)
    messages.success(request, "Adhesion effectuee")
    return redirect("/users/profil/" + userid)


def process(request, token):
    valid_reqs = Request.objects.filter(expires_at__gt=timezone.now())
    req = get_object_or_404(valid_reqs, token=token)

    if req.type == Request.PASSWD:
        return process_passwd(request, req)
    else:
        messages.error(request, "Entrée incorrecte, contactez un admin")
        redirect("/")


def process_passwd(request, req):
    u_form = PassForm(request.POST or None)
    user = req.user
    if u_form.is_valid():
        return password_change_action(u_form, user, request, req=req)
    return form({'userform': u_form}, 'users/user.html', request)