aboutsummaryrefslogtreecommitdiff
path: root/src/web/views/views.py
blob: ed4ae8a798e8691453907bb8f83440ecedee16bd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
#! /usr/bin/env python
# -*- coding: utf-8 -*-

# jarr - A Web based news aggregator.
# Copyright (C) 2010-2015  Cédric Bonhomme - https://www.JARR-aggregator.org
#
# For more information : https://github.com/JARR-aggregator/JARR
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 5.3 $"
__date__ = "$Date: 2010/01/29 $"
__revision__ = "$Date: 2014/08/27 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "AGPLv3"

import os
import string
import random
import hashlib
import logging
import datetime
from collections import OrderedDict

from bootstrap import application as app, db
from flask import render_template, request, flash, session, \
                  url_for, redirect, g, current_app, make_response
from flask.ext.login import LoginManager, login_user, logout_user, \
                            login_required, current_user, AnonymousUserMixin, \
                            login_url
from flask.ext.principal import Principal, Identity, AnonymousIdentity, \
                                identity_changed, identity_loaded, Permission,\
                                RoleNeed, UserNeed
from flask.ext.babel import gettext
from sqlalchemy import or_, and_
from sqlalchemy.exc import IntegrityError
from werkzeug import generate_password_hash

import conf
from web import utils, notifications, export
from web.lib.view_utils import etag_match
from web.models import User, Feed, Article, Role
from web.decorators import feed_access_required
from web.forms import SignupForm, SigninForm, InformationMessageForm,\
                    ProfileForm, UserForm, RecoverPasswordForm \

from web.controllers import UserController, FeedController, \
                                     ArticleController


Principal(app)
# Create a permission with a single Need, in this case a RoleNeed.
admin_permission = Permission(RoleNeed('admin'))

login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_message = gettext('Authentication required.')
login_manager.login_message_category = "info"
login_manager.login_view = 'login'

logger = logging.getLogger(__name__)

#
# Management of the user's session.
#
@identity_loaded.connect_via(app)
def on_identity_loaded(sender, identity):
    # Set the identity user object
    identity.user = current_user

    # Add the UserNeed to the identity
    if hasattr(current_user, 'id'):
        identity.provides.add(UserNeed(current_user.id))

    # Assuming the User model has a list of roles, update the
    # identity with the roles that the user provides
    if hasattr(current_user, 'roles'):
        for role in current_user.roles:
            identity.provides.add(RoleNeed(role.name))

@app.before_request
def before_request():
    g.user = current_user
    if g.user.is_authenticated:
        g.user.last_seen = datetime.datetime.utcnow()
        db.session.add(g.user)
        db.session.commit()

@login_manager.user_loader
def load_user(id):
    # Return an instance of the User model
    return UserController().get(id=id)

#
# Custom error pages.
#
@app.errorhandler(401)
def authentication_required(e):
    flash(gettext('Authentication required.'), 'info')
    return redirect(url_for('login'))

@app.errorhandler(403)
def authentication_failed(e):
    flash(gettext('Forbidden.'), 'danger')
    return redirect(url_for('login'))

@app.errorhandler(404)
def page_not_found(e):
    return render_template('errors/404.html'), 404

@app.errorhandler(500)
def internal_server_error(e):
    return render_template('errors/500.html'), 500


def redirect_url(default='home'):
    return request.args.get('next') or \
            request.referrer or \
            url_for(default)

@g.babel.localeselector
def get_locale():
    """
    Called before each request to give us a chance to choose
    the language to use when producing its response.
    """
    return request.accept_languages.best_match(conf.LANGUAGES.keys())

@g.babel.timezoneselector
def get_timezone():
    try:
        return conf.TIME_ZONE[get_locale()]
    except:
        return conf.TIME_ZONE["en"]

#
# Views.
#
@app.route('/login', methods=['GET', 'POST'])
def login():
    """
    Log in view.
    """
    if g.user is not None and g.user.is_authenticated:
        return redirect(url_for('home'))
    g.user = AnonymousUserMixin()
    form = SigninForm()
    if form.validate_on_submit():
        user = UserController().get(email=form.email.data)
        login_user(user)
        g.user = user
        session['email'] = form.email.data
        identity_changed.send(current_app._get_current_object(),
                              identity=Identity(user.id))
        return form.redirect('home')
    return render_template('login.html', form=form)

@app.route('/logout')
@login_required
def logout():
    """
    Log out view. Removes the user information from the session.
    """
    session.pop('email', None)

    # Remove the user information from the session
    logout_user()

    # Remove session keys set by Flask-Principal
    for key in ('identity.name', 'identity.auth_type'):
        session.pop(key, None)

    # Tell Flask-Principal the user is anonymous
    identity_changed.send(current_app._get_current_object(),
                          identity=AnonymousIdentity())

    flash(gettext("Logged out successfully."), 'success')
    return redirect(url_for('login'))

@app.route('/signup', methods=['GET', 'POST'])
def signup():
    """
    Signup page.
    """
    if int(os.environ.get("SELF_REGISTRATION", 0)) != 1:
        flash(gettext("Self-registration is disabled."), 'warning')
        return redirect(url_for('home'))
    if g.user is not None and g.user.is_authenticated:
        return redirect(url_for('home'))

    form = SignupForm()

    if form.validate_on_submit():
        role_user = Role.query.filter(Role.name == "user").first()
        user = User(nickname=form.nickname.data,
                    email=form.email.data,
                    pwdhash=generate_password_hash(form.password.data))
        user.roles = [role_user]
        db.session.add(user)
        try:
            db.session.commit()
        except IntegrityError:
            flash(gettext('Email already used.'), 'warning')
            return render_template('signup.html', form=form)

        # Send the confirmation email
        try:
            notifications.new_account_notification(user)
        except Exception as error:
            flash(gettext('Problem while sending activation email: %(error)s',
                          error=error), 'danger')
            return redirect(url_for('home'))

        flash(gettext('Your account has been created. '
                      'Check your mail to confirm it.'), 'success')
        return redirect(url_for('home'))

    return render_template('signup.html', form=form)


@etag_match
def render_home(filters=None, head_titles=None,
                page_to_render='home', **kwargs):
    if filters is None:
        filters = {}
    if head_titles is None:
        head_titles = []
    feed_contr = FeedController(g.user.id)
    arti_contr = ArticleController(g.user.id)
    feeds = {feed.id: feed.title for feed in feed_contr.read()}

    in_error = {feed.id: feed.error_count for feed in
                feed_contr.read(error_count__gt=2)}

    filter_ = request.args.get('filter_',
                               'unread' if page_to_render == 'home' else 'all')
    sort_ = request.args.get('sort_', 'date')
    feed_id = int(request.args.get('feed_id', 0))
    limit = request.args.get('limit', 1000)

    if filter_ != 'all':
        filters['readed'] = filter_ == 'read'
    if feed_id:
        filters['feed_id'] = feed_id
        head_titles.append(feed_contr.get(id=feed_id).title)

    sort_param = {"feed": Feed.title.desc(),
                  "date": Article.date.desc(),
                  "article": Article.title.desc(),
                  "-feed": Feed.title.asc(),
                  "-date": Article.date.asc(),
                  "-article": Article.title.asc()
                  }.get(sort_, Article.date.desc())

    articles = arti_contr.read(**filters).join(Article.source). \
                                            order_by(sort_param)
    if limit != 'all':
        limit = int(limit)
        articles = articles.limit(limit)

    def gen_url(filter_=filter_, sort_=sort_, limit=limit, feed_id=feed_id,
                **kwargs):
        o_kwargs = OrderedDict()
        for key in sorted(kwargs):
            o_kwargs[key] = kwargs[key]
        if page_to_render == 'search':
            o_kwargs['query'] = request.args.get('query', '')
            o_kwargs['search_title'] = request.args.get('search_title', 'off')
            o_kwargs['search_content'] = request.args.get(
                    'search_content', 'off')
            # if nor title and content are selected, selecting title
            if o_kwargs['search_title'] == o_kwargs['search_content'] == 'off':
                o_kwargs['search_title'] = 'on'
        o_kwargs['filter_'] = filter_
        o_kwargs['sort_'] = sort_
        o_kwargs['limit'] = limit
        o_kwargs['feed_id'] = feed_id
        return url_for(page_to_render, **o_kwargs)

    articles = list(articles)
    if (page_to_render == 'home' and feed_id or page_to_render == 'search') \
            and filter_ != 'all' and not articles:
        return redirect(gen_url(filter_='all'))

    return render_template('home.html', gen_url=gen_url,
                           feed_id=feed_id, page_to_render=page_to_render,
                           filter_=filter_, limit=limit, feeds=feeds,
                           unread=arti_contr.count_by_feed(readed=False),
                           articles=articles, in_error=in_error,
                           head_titles=head_titles, sort_=sort_, **kwargs)


@app.route('/')
@login_required
def home():
    "Home page for connected users. Displays by default unread articles."
    return render_home()


@app.route('/favorites')
@login_required
def favorites():
    return render_home({'like': True}, [gettext('Favorites')], 'favorites')


@app.route('/search', methods=['GET'])
@login_required
def search():
    "Search articles corresponding to the query."
    if 'query' not in request.args:
        flash(gettext("No text to search were provided."), "warning")
        return render_home()
    query = request.args['query']
    filters = {}
    search_title = request.args.get('search_title', 'off')
    search_content = request.args.get('search_content', 'off')
    if search_title == 'on':
        filters['title__ilike'] = "%%%s%%" % query
    if search_content == 'on':
        filters['content__ilike'] = "%%%s%%" % query
    if len(filters) == 0:
        search_title = 'on'
        filters['title__ilike'] = "%%%s%%" % query
    if len(filters) > 1:
        filters = {"__or__": filters}
    return render_home(filters, ["%s %s" % (gettext('Search:'), query)],
                       'search', search_query=query, search_title=search_title,
                       search_content=search_content)


@app.route('/fetch', methods=['GET'])
@app.route('/fetch/<int:feed_id>', methods=['GET'])
@login_required
def fetch(feed_id=None):
    """
    Triggers the download of news.
    News are downloaded in a separated process, mandatory for Heroku.
    """
    if conf.CRAWLING_METHOD == "classic" \
            and (not conf.ON_HEROKU or g.user.is_admin()):
        utils.fetch(g.user.id, feed_id)
        flash(gettext("Downloading articles..."), "info")
    else:
        flash(gettext("The manual retrieving of news is only available " +
                      "for administrator, on the Heroku platform."), "info")
    return redirect(redirect_url())


@app.route('/about', methods=['GET'])
@etag_match
def about():
    """
    'About' page.
    """
    return render_template('about.html')


@app.route('/mark_as/<string:new_value>', methods=['GET'])
@app.route('/mark_as/<string:new_value>/article/<int:article_id>', methods=['GET'])
@login_required
@feed_access_required
def mark_as(new_value='read', feed_id=None, article_id=None):
    """
    Mark all unreaded articles as read.
    """
    readed = new_value == 'read'
    articles = Article.query.filter(Article.user_id == g.user.id)
    if feed_id is not None:
        articles = articles.filter(Article.feed_id == feed_id)
        message = 'Feed marked as %s.'
    elif article_id is not None:
        articles = articles.filter(Article.id == article_id)
        message = 'Article marked as %s.'
    else:
        message = 'All article marked as %s.'
    articles.filter(Article.readed == (not readed)).update({"readed": readed})
    flash(gettext(message % new_value), 'info')
    db.session.commit()
    if readed:
        return redirect(redirect_url())
    return redirect(url_for('home'))

@app.route('/like/<int:article_id>', methods=['GET'])
@login_required
def like(article_id=None):
    """
    Mark or unmark an article as favorites.
    """
    Article.query.filter(Article.user_id == g.user.id, Article.id == article_id). \
                update({
                        "like": not Article.query.filter(Article.id == article_id).first().like
                       })
    db.session.commit()
    return redirect(redirect_url())

@app.route('/delete/<int:article_id>', methods=['GET'])
@login_required
def delete(article_id=None):
    """
    Delete an article from the database.
    """
    article = Article.query.filter(Article.id == article_id).first()
    if article is not None and article.source.subscriber.id == g.user.id:
        db.session.delete(article)
        db.session.commit()
        flash(gettext('Article') + ' ' + article.title + ' ' + gettext('deleted.'), 'success')
        return redirect(redirect_url())
    else:
        flash(gettext('This article do not exist.'), 'danger')
        return redirect(url_for('home'))


@app.route('/inactives', methods=['GET'])
@login_required
def inactives():
    """
    List of inactive feeds.
    """
    nb_days = int(request.args.get('nb_days', 365))
    user = UserController(g.user.id).get(email=g.user.email)
    today = datetime.datetime.now()
    inactives = []
    for feed in user.feeds:
        try:
            last_post = feed.articles[0].date
        except IndexError:
            continue
        elapsed = today - last_post
        if elapsed > datetime.timedelta(days=nb_days):
            inactives.append((feed, elapsed))
    inactives.sort(key=lambda tup: tup[1], reverse=True)
    return render_template('inactives.html', inactives=inactives, nb_days=nb_days)

@app.route('/duplicates/<int:feed_id>', methods=['GET'])
@login_required
def duplicates(feed_id=None):
    """
    Return duplicates article for a feed.
    """
    feed = Feed.query.filter(Feed.user_id == g.user.id, Feed.id == feed_id).first()
    duplicates = []
    duplicates = utils.compare_documents(feed)
    if len(duplicates) == 0:
        flash(gettext('No duplicates in the feed "{}".').format(feed.title),
                'info')
        return redirect(redirect_url())
    return render_template('duplicates.html', duplicates=duplicates, feed=feed)

@app.route('/export', methods=['GET'])
@login_required
def export_articles():
    """
    Export all articles to HTML or JSON.
    """
    user = UserController(g.user.id).get(id=g.user.id)
    if request.args.get('format') == "HTML":
        # Export to HTML
        try:
            archive_file, archive_file_name = export.export_html(user)
        except:
            flash(gettext("Error when exporting articles."), 'danger')
            return redirect(redirect_url())
        response = make_response(archive_file)
        response.headers['Content-Type'] = 'application/x-compressed'
        response.headers['Content-Disposition'] = 'attachment; filename=%s' \
                % archive_file_name
    elif request.args.get('format') == "JSON":
        # Export to JSON
        try:
            json_result = export.export_json(user)
        except:
            flash(gettext("Error when exporting articles."), 'danger')
            return redirect(redirect_url())
        response = make_response(json_result)
        response.mimetype = 'application/json'
        response.headers["Content-Disposition"] = 'attachment; filename=account.json'
    else:
        flash(gettext('Export format not supported.'), 'warning')
        return redirect(redirect_url())
    return response

@app.route('/export_opml', methods=['GET'])
@login_required
def export_opml():
    """
    Export all feeds to OPML.
    """
    user = UserController(g.user.id).get(id=g.user.id)
    response = make_response(render_template('opml.xml', user=user,
                                             now=datetime.datetime.now()))
    response.headers['Content-Type'] = 'application/xml'
    response.headers['Content-Disposition'] = 'attachment; filename=feeds.opml'
    return response


@app.route('/management', methods=['GET', 'POST'])
@login_required
def management():
    """
    Display the management page.
    """
    if request.method == 'POST':
        if None != request.files.get('opmlfile', None):
            # Import an OPML file
            data = request.files.get('opmlfile', None)
            if not utils.allowed_file(data.filename):
                flash(gettext('File not allowed.'), 'danger')
            else:
                try:
                    nb = utils.import_opml(g.user.email, data.read())
                    if conf.CRAWLING_METHOD == "classic":
                        utils.fetch(g.user.email, None)
                        flash(str(nb) + '  ' + gettext('feeds imported.'),
                                "success")
                        flash(gettext("Downloading articles..."), 'info')
                except:
                    flash(gettext("Impossible to import the new feeds."),
                            "danger")
        elif None != request.files.get('jsonfile', None):
            # Import an account
            data = request.files.get('jsonfile', None)
            if not utils.allowed_file(data.filename):
                flash(gettext('File not allowed.'), 'danger')
            else:
                try:
                    nb = utils.import_json(g.user.email, data.read())
                    flash(gettext('Account imported.'), "success")
                except:
                    flash(gettext("Impossible to import the account."),
                            "danger")
        else:
            flash(gettext('File not allowed.'), 'danger')

    nb_feeds = len(g.user.feeds.all())
    articles = Article.query.filter(Article.user_id == g.user.id)
    nb_articles = articles.count()
    nb_unread_articles = articles.filter(Article.readed == False).count()
    return render_template('management.html', user=g.user,
                            nb_feeds=nb_feeds, nb_articles=nb_articles,
                            nb_unread_articles=nb_unread_articles)

@app.route('/history', methods=['GET'])
@app.route('/history/<int:year>', methods=['GET'])
@app.route('/history/<int:year>/<int:month>', methods=['GET'])
@login_required
def history(year=None, month=None):
    articles_counter, articles = utils.history(g.user.id, year, month)
    return render_template('history.html',
                            articles_counter=articles_counter,
                            articles=articles,
                            year=year, month=month)


@app.route('/profile', methods=['GET', 'POST'])
@login_required
def profile():
    """
    Edit the profile of the currently logged user.
    """
    user = UserController(g.user.id).get(id=g.user.id)
    form = ProfileForm()

    if request.method == 'POST':
        if form.validate():
            form.populate_obj(user)
            if form.password.data != "":
                user.set_password(form.password.data)
            db.session.commit()
            flash("%s %s %s" % (gettext('User'), user.nickname,
                                gettext('successfully updated.')),
                  'success')
            return redirect(url_for('profile'))
        else:
            return render_template('profile.html', user=user, form=form)

    if request.method == 'GET':
        form = ProfileForm(obj=user)
        return render_template('profile.html', user=user, form=form)

@app.route('/delete_account', methods=['GET'])
@login_required
def delete_account():
    """
    Delete the account of the user (with all its data).
    """
    user = UserController(g.user.id).get(id=g.user.id)
    if user is not None:
        db.session.delete(user)
        db.session.commit()
        flash(gettext('Your account has been deleted.'), 'success')
    else:
        flash(gettext('This user does not exist.'), 'danger')
    return redirect(url_for('login'))

@app.route('/expire_articles', methods=['GET'])
@login_required
def expire_articles():
    """
    Delete articles older than the given number of weeks.
    """
    weeks_ago = datetime.datetime.utcnow() - \
                datetime.timedelta(weeks=int(request.args.get('weeks', 10)))
    Article.query.filter(
                        and_(Article.user_id == g.user.id,
                                or_(Article.date < weeks_ago,
                                Article.retrieved_date < weeks_ago))).delete()
    flash(gettext('Articles deleted.'), 'info')
    db.session.commit()
    return redirect(redirect_url())

@app.route('/confirm_account/<string:activation_key>', methods=['GET'])
def confirm_account(activation_key=None):
    """
    Confirm the account of a user.
    """
    if activation_key != "":
        user = User.query.filter(User.activation_key == activation_key).first()
        if user is not None:
            user.activation_key = ""
            db.session.commit()
            flash(gettext('Your account has been confirmed.'), 'success')
        else:
            flash(gettext('Impossible to confirm this account.'), 'danger')
    return redirect(url_for('login'))

@app.route('/recover', methods=['GET', 'POST'])
def recover():
    """
    Enables the user to recover its account when he has forgotten
    its password.
    """
    form = RecoverPasswordForm()

    if request.method == 'POST':
        if form.validate():
            user = User.query.filter(User.email == form.email.data).first()
            characters = string.ascii_letters + string.digits
            password = "".join(random.choice(characters) for x in range(random.randint(8, 16)))
            user.set_password(password)
            db.session.commit()

            # Send the confirmation email
            try:
                notifications.new_password_notification(user, password)
                flash(gettext('New password sent to your address.'), 'success')
            except Exception as e:
                flash(gettext('Problem while sending your new password.') + ': ' + str(e), 'danger')

            return redirect(url_for('login'))
        return render_template('recover.html', form=form)

    if request.method == 'GET':
        return render_template('recover.html', form=form)

#
# Views dedicated to administration tasks.
#
@app.route('/admin/dashboard', methods=['GET', 'POST'])
@login_required
@admin_permission.require(http_exception=403)
def dashboard():
    """
    Adminstrator's dashboard.
    """
    form = InformationMessageForm()

    if request.method == 'POST':
        if form.validate():
            try:
                notifications.information_message(form.subject.data, form.message.data)
            except Exception as e:
                flash(gettext('Problem while sending email') + ': ' + str(e), 'danger')

    users = User.query.all()
    return render_template('admin/dashboard.html', users=users, current_user=g.user, form=form)

@app.route('/admin/create_user', methods=['GET', 'POST'])
@app.route('/admin/edit_user/<int:user_id>', methods=['GET', 'POST'])
@login_required
@admin_permission.require(http_exception=403)
def create_user(user_id=None):
    """
    Create or edit a user.
    """
    form = UserForm()

    if request.method == 'POST':
        if form.validate():
            role_user = Role.query.filter(Role.name == "user").first()
            if user_id is not None:
                # Edit a user
                user = User.query.filter(User.id == user_id).first()
                form.populate_obj(user)
                if form.password.data != "":
                    user.set_password(form.password.data)
                db.session.commit()
                flash(gettext('User') + ' ' + user.nickname + ' ' + gettext('successfully updated.'), 'success')
            else:
                # Create a new user
                user = User(nickname=form.nickname.data,
                             email=form.email.data,
                             pwdhash=generate_password_hash(form.password.data))
                user.roles.extend([role_user])
                user.activation_key = ""
                db.session.add(user)
                db.session.commit()
                flash("%s %s %s" % (gettext('User'), user.nickname,
                                    gettext('successfully created.')),
                      'success')
            return redirect(url_for('create_user', user_id=user.id))
        else:
            return redirect(url_for('create_user'))

    if request.method == 'GET':
        if user_id is not None:
            user = User.query.filter(User.id == user_id).first()
            form = UserForm(obj=user)
            message = "%s <i>%s</i>" % (gettext('Edit the user'),
                                        user.nickname)
        else:
            form = UserForm()
            message = gettext('Add a new user')
        return render_template('/admin/create_user.html',
                               form=form, message=message)

@app.route('/admin/user/<int:user_id>', methods=['GET'])
@login_required
@admin_permission.require(http_exception=403)
def user(user_id=None):
    """
    See information about a user (stations, etc.).
    """
    user = UserController().get(id=user_id)
    if user is not None:
        article_contr = ArticleController(user_id)
        return render_template('/admin/user.html', user=user, feeds=user.feeds,
                article_count=article_contr.count_by_feed(),
                unread_article_count=article_contr.count_by_feed(readed=False))

    else:
        flash(gettext('This user does not exist.'), 'danger')
        return redirect(redirect_url())

@app.route('/admin/delete_user/<int:user_id>', methods=['GET'])
@login_required
@admin_permission.require(http_exception=403)
def delete_user(user_id=None):
    """
    Delete a user (with all its data).
    """
    user = User.query.filter(User.id == user_id).first()
    if user is not None:
        db.session.delete(user)
        db.session.commit()
        flash(gettext('User') + ' ' + user.nickname + ' ' + gettext('successfully deleted.'), 'success')
    else:
        flash(gettext('This user does not exist.'), 'danger')
    return redirect(redirect_url())

@app.route('/admin/enable_user/<int:user_id>', methods=['GET'])
@app.route('/admin/disable_user/<int:user_id>', methods=['GET'])
@login_required
@admin_permission.require()
def disable_user(user_id=None):
    """
    Enable or disable the account of a user.
    """
    user = User.query.filter(User.id == user_id).first()
    if user is not None:
        if user.activation_key != "":

            # Send the confirmation email
            try:
                notifications.new_account_activation(user)
                user.activation_key = ""
                flash(gettext('Account of the user') + ' ' + user.nickname + ' ' + gettext('successfully activated.'), 'success')
            except Exception as e:
                flash(gettext('Problem while sending activation email') + ': ' + str(e), 'danger')

        else:
            user.activation_key = hashlib.sha512(str(random.getrandbits(256)).encode("utf-8")).hexdigest()[:86]
            flash(gettext('Account of the user') + ' ' + user.nickname + ' ' + gettext('successfully disabled.'), 'success')
        db.session.commit()
    else:
        flash(gettext('This user does not exist.'), 'danger')
    return redirect(redirect_url())
bgstack15