mediagoblin/edit/views.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011, 2012 MediaGoblin contributors.  See AUTHORS.
   3 #
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU Affero General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU Affero General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 import six
  18
  19 from datetime import datetime
  20
  21 from itsdangerous import BadSignature
  22 from pyld import jsonld
  23 from werkzeug.exceptions import Forbidden
  24 from werkzeug.utils import secure_filename
  25 from jsonschema import ValidationError, Draft4Validator
  26
  27 from mediagoblin import messages
  28 from mediagoblin import mg_globals
  29
  30 from mediagoblin.auth import (check_password,
  31                               tools as auth_tools)
  32 from mediagoblin.edit import forms
  33 from mediagoblin.edit.lib import may_edit_media
  34 from mediagoblin.decorators import (require_active_login, active_user_from_url,
  35                             get_media_entry_by_id, user_may_alter_collection,
  36                             get_user_collection, user_has_privilege,
  37                             user_not_banned)
  38 from mediagoblin.tools.crypto import get_timed_signer_url
  39 from mediagoblin.tools.metadata import (compact_and_validate, DEFAULT_CHECKER,
  40                                         DEFAULT_SCHEMA)
  41 from mediagoblin.tools.mail import email_debug_message
  42 from mediagoblin.tools.response import (render_to_response,
  43                                         redirect, redirect_obj, render_404)
  44 from mediagoblin.tools.translate import pass_to_ugettext as _
  45 from mediagoblin.tools.template import render_template
  46 from mediagoblin.tools.text import (
  47     convert_to_tag_list_of_dicts, media_tags_as_string)
  48 from mediagoblin.tools.url import slugify
  49 from mediagoblin.db.util import check_media_slug_used, check_collection_slug_used
  50 from mediagoblin.db.models import User, LocalUser, Client, AccessToken, Location
  51
  52 import mimetypes
  53
  54
  55 @get_media_entry_by_id
  56 @require_active_login
  57 def edit_media(request, media):
  58     if not may_edit_media(request, media):
  59         raise Forbidden("User may not edit this media")
  60
  61     defaults = dict(
  62         title=media.title,
  63         slug=media.slug,
  64         description=media.description,
  65         tags=media_tags_as_string(media.tags),
  66         license=media.license)
  67
  68     form = forms.EditForm(
  69         request.form,
  70         **defaults)
  71
  72     if request.method == 'POST' and form.validate():
  73         # Make sure there isn't already a MediaEntry with such a slug
  74         # and userid.
  75         slug = slugify(form.slug.data)
  76         slug_used = check_media_slug_used(media.actor, slug, media.id)
  77
  78         if slug_used:
  79             form.slug.errors.append(
  80                 _(u'An entry with that slug already exists for this user.'))
  81         else:
  82             media.title = form.title.data
  83             media.description = form.description.data
  84             media.tags = convert_to_tag_list_of_dicts(
  85                                    form.tags.data)
  86
  87             media.license = six.text_type(form.license.data) or None
  88             media.slug = slug
  89             media.save()
  90
  91             return redirect_obj(request, media)
  92
  93     if request.user.has_privilege(u'admin') \
  94             and media.actor != request.user.id \
  95             and request.method != 'POST':
  96         messages.add_message(
  97             request,
  98             messages.WARNING,
  99             _("You are editing another user's media. Proceed with caution."))
 100
 101     return render_to_response(
 102         request,
 103         'mediagoblin/edit/edit.html',
 104         {'media': media,
 105          'form': form})
 106
 107
 108 # Mimetypes that browsers parse scripts in.
 109 # Content-sniffing isn't taken into consideration.
 110 UNSAFE_MIMETYPES = [
 111         'text/html',
 112         'text/svg+xml']
 113
 114
 115 @get_media_entry_by_id
 116 @require_active_login
 117 def edit_attachments(request, media):
 118     if mg_globals.app_config['allow_attachments']:
 119         form = forms.EditAttachmentsForm()
 120
 121         # Add any attachements
 122         if 'attachment_file' in request.files \
 123             and request.files['attachment_file']:
 124
 125             # Security measure to prevent attachments from being served as
 126             # text/html, which will be parsed by web clients and pose an XSS
 127             # threat.
 128             #
 129             # TODO
 130             # This method isn't flawless as some browsers may perform
 131             # content-sniffing.
 132             # This method isn't flawless as we do the mimetype lookup on the
 133             # machine parsing the upload form, and not necessarily the machine
 134             # serving the attachments.
 135             if mimetypes.guess_type(
 136                     request.files['attachment_file'].filename)[0] in \
 137                     UNSAFE_MIMETYPES:
 138                 public_filename = secure_filename('{0}.notsafe'.format(
 139                     request.files['attachment_file'].filename))
 140             else:
 141                 public_filename = secure_filename(
 142                         request.files['attachment_file'].filename)
 143
 144             attachment_public_filepath \
 145                 = mg_globals.public_store.get_unique_filepath(
 146                 ['media_entries', six.text_type(media.id), 'attachment',
 147                  public_filename])
 148
 149             attachment_public_file = mg_globals.public_store.get_file(
 150                 attachment_public_filepath, 'wb')
 151
 152             try:
 153                 attachment_public_file.write(
 154                     request.files['attachment_file'].stream.read())
 155             finally:
 156                 request.files['attachment_file'].stream.close()
 157
 158             media.attachment_files.append(dict(
 159                     name=form.attachment_name.data \
 160                         or request.files['attachment_file'].filename,
 161                     filepath=attachment_public_filepath,
 162                     created=datetime.utcnow(),
 163                     ))
 164
 165             media.save()
 166
 167             messages.add_message(
 168                 request,
 169                 messages.SUCCESS,
 170                 _("You added the attachment %s!") %
 171                     (form.attachment_name.data or
 172                      request.files['attachment_file'].filename))
 173
 174             return redirect(request,
 175                             location=media.url_for_self(request.urlgen))
 176         return render_to_response(
 177             request,
 178             'mediagoblin/edit/attachments.html',
 179             {'media': media,
 180              'form': form})
 181     else:
 182         raise Forbidden("Attachments are disabled")
 183
 184 @require_active_login
 185 def legacy_edit_profile(request):
 186     """redirect the old /edit/profile/?username=USER to /u/USER/edit/"""
 187     username = request.GET.get('username') or request.user.username
 188     return redirect(request, 'mediagoblin.edit.profile', user=username)
 189
 190
 191 @require_active_login
 192 @active_user_from_url
 193 def edit_profile(request, url_user=None):
 194     # admins may edit any user profile
 195     if request.user.username != url_user.username:
 196         if not request.user.has_privilege(u'admin'):
 197             raise Forbidden(_("You can only edit your own profile."))
 198
 199         # No need to warn again if admin just submitted an edited profile
 200         if request.method != 'POST':
 201             messages.add_message(
 202                 request,
 203                 messages.WARNING,
 204                 _("You are editing a user's profile. Proceed with caution."))
 205
 206     user = url_user
 207
 208     # Get the location name
 209     if user.location is None:
 210         location = ""
 211     else:
 212         location = user.get_location.name
 213
 214     form = forms.EditProfileForm(request.form,
 215         url=user.url,
 216         bio=user.bio,
 217         location=location)
 218
 219     if request.method == 'POST' and form.validate():
 220         user.url = six.text_type(form.url.data)
 221         user.bio = six.text_type(form.bio.data)
 222
 223         # Save location
 224         if form.location.data and user.location is None:
 225             user.get_location = Location(name=six.text_type(form.location.data))
 226         elif form.location.data:
 227             location = user.get_location
 228             location.name = six.text_type(form.location.data)
 229             location.save()
 230
 231         user.save()
 232
 233         messages.add_message(
 234             request,
 235             messages.SUCCESS,
 236             _("Profile changes saved"))
 237         return redirect(request,
 238                        'mediagoblin.user_pages.user_home',
 239                         user=user.username)
 240
 241     return render_to_response(
 242         request,
 243         'mediagoblin/edit/edit_profile.html',
 244         {'user': user,
 245          'form': form})
 246
 247 EMAIL_VERIFICATION_TEMPLATE = (
 248     u'{uri}?'
 249     u'token={verification_key}')
 250
 251
 252 @require_active_login
 253 def edit_account(request):
 254     user = request.user
 255     form = forms.EditAccountForm(request.form,
 256         wants_comment_notification=user.wants_comment_notification,
 257         license_preference=user.license_preference,
 258         wants_notifications=user.wants_notifications)
 259
 260     if request.method == 'POST' and form.validate():
 261         user.wants_comment_notification = form.wants_comment_notification.data
 262         user.wants_notifications = form.wants_notifications.data
 263
 264         user.license_preference = form.license_preference.data
 265
 266         user.save()
 267         messages.add_message(
 268             request,
 269             messages.SUCCESS,
 270             _("Account settings saved"))
 271         return redirect(request,
 272                         'mediagoblin.user_pages.user_home',
 273                         user=user.username)
 274
 275     return render_to_response(
 276         request,
 277         'mediagoblin/edit/edit_account.html',
 278         {'user': user,
 279          'form': form})
 280
 281 @require_active_login
 282 def deauthorize_applications(request):
 283     """ Deauthroize OAuth applications """
 284     if request.method == 'POST' and "application" in request.form:
 285         token = request.form["application"]
 286         access_token = AccessToken.query.filter_by(token=token).first()
 287         if access_token is None:
 288             messages.add_message(
 289                 request,
 290                 messages.ERROR,
 291                 _("Unknown application, not able to deauthorize")
 292             )
 293         else:
 294             access_token.delete()
 295             messages.add_message(
 296                 request,
 297                 messages.SUCCESS,
 298                 _("Application has been deauthorized")
 299             )
 300
 301     access_tokens = AccessToken.query.filter_by(actor=request.user.id)
 302     applications = [(a.get_requesttoken, a) for a in access_tokens]
 303
 304     return render_to_response(
 305         request,
 306         'mediagoblin/edit/deauthorize_applications.html',
 307         {'applications': applications}
 308     )
 309
 310 @require_active_login
 311 def delete_account(request):
 312     """Delete a user completely"""
 313     user = request.user
 314     if request.method == 'POST':
 315         if request.form.get(u'confirmed'):
 316             # Form submitted and confirmed. Actually delete the user account
 317             # Log out user and delete cookies etc.
 318             # TODO: Should we be using MG.auth.views.py:logout for this?
 319             request.session.delete()
 320
 321             # Delete user account and all related media files etc....
 322             user = User.query.filter(User.id==user.id).first()
 323             user.delete()
 324
 325             # We should send a message that the user has been deleted
 326             # successfully. But we just deleted the session, so we
 327             # can't...
 328             return redirect(request, 'index')
 329
 330         else: # Did not check the confirmation box...
 331             messages.add_message(
 332                 request,
 333                 messages.WARNING,
 334                 _('You need to confirm the deletion of your account.'))
 335
 336     # No POST submission or not confirmed, just show page
 337     return render_to_response(
 338         request,
 339         'mediagoblin/edit/delete_account.html',
 340         {'user': user})
 341
 342
 343 @require_active_login
 344 @user_may_alter_collection
 345 @get_user_collection
 346 def edit_collection(request, collection):
 347     defaults = dict(
 348         title=collection.title,
 349         slug=collection.slug,
 350         description=collection.description)
 351
 352     form = forms.EditCollectionForm(
 353         request.form,
 354         **defaults)
 355
 356     if request.method == 'POST' and form.validate():
 357         # Make sure there isn't already a Collection with such a slug
 358         # and userid.
 359         slug_used = check_collection_slug_used(collection.actor,
 360                 form.slug.data, collection.id)
 361
 362         # Make sure there isn't already a Collection with this title
 363         existing_collection = request.db.Collection.query.filter_by(
 364                 actor=request.user.id,
 365                 title=form.title.data).first()
 366
 367         if existing_collection and existing_collection.id != collection.id:
 368             messages.add_message(
 369                 request,
 370                 messages.ERROR,
 371                 _('You already have a collection called "%s"!') %
 372                     form.title.data)
 373         elif slug_used:
 374             form.slug.errors.append(
 375                 _(u'A collection with that slug already exists for this user.'))
 376         else:
 377             collection.title = six.text_type(form.title.data)
 378             collection.description = six.text_type(form.description.data)
 379             collection.slug = six.text_type(form.slug.data)
 380
 381             collection.save()
 382
 383             return redirect_obj(request, collection)
 384
 385     if request.user.has_privilege(u'admin') \
 386             and collection.actor != request.user.id \
 387             and request.method != 'POST':
 388         messages.add_message(
 389             request,
 390             messages.WARNING,
 391             _("You are editing another user's collection. "
 392               "Proceed with caution."))
 393
 394     return render_to_response(
 395         request,
 396         'mediagoblin/edit/edit_collection.html',
 397         {'collection': collection,
 398          'form': form})
 399
 400
 401 def verify_email(request):
 402     """
 403     Email verification view for changing email address
 404     """
 405     # If no token, we can't do anything
 406     if not 'token' in request.GET:
 407         return render_404(request)
 408
 409     # Catch error if token is faked or expired
 410     token = None
 411     try:
 412         token = get_timed_signer_url("mail_verification_token") \
 413                 .loads(request.GET['token'], max_age=10*24*3600)
 414     except BadSignature:
 415         messages.add_message(
 416             request,
 417             messages.ERROR,
 418             _('The verification key or user id is incorrect.'))
 419
 420         return redirect(
 421             request,
 422             'index')
 423
 424     user = User.query.filter_by(id=int(token['user'])).first()
 425
 426     if user:
 427         user.email = token['email']
 428         user.save()
 429
 430         messages.add_message(
 431             request,
 432             messages.SUCCESS,
 433             _('Your email address has been verified.'))
 434
 435     else:
 436             messages.add_message(
 437                 request,
 438                 messages.ERROR,
 439                 _('The verification key or user id is incorrect.'))
 440
 441     return redirect(
 442         request, 'mediagoblin.user_pages.user_home',
 443         user=user.username)
 444
 445
 446 @require_active_login
 447 def change_email(request):
 448     """ View to change the user's email """
 449     form = forms.ChangeEmailForm(request.form)
 450     user = request.user
 451
 452     # If no password authentication, no need to enter a password
 453     if 'pass_auth' not in request.template_env.globals or not user.pw_hash:
 454         form.__delitem__('password')
 455
 456     if request.method == 'POST' and form.validate():
 457         new_email = form.new_email.data
 458         users_with_email = User.query.filter(
 459             LocalUser.email==new_email
 460         ).count()
 461
 462         if users_with_email:
 463             form.new_email.errors.append(
 464                 _('Sorry, a user with that email address'
 465                     ' already exists.'))
 466
 467         if form.password and user.pw_hash and not check_password(
 468                 form.password.data, user.pw_hash):
 469             form.password.errors.append(
 470                 _('Wrong password'))
 471
 472         if not form.errors:
 473             verification_key = get_timed_signer_url(
 474                 'mail_verification_token').dumps({
 475                     'user': user.id,
 476                     'email': new_email})
 477
 478             rendered_email = render_template(
 479                 request, 'mediagoblin/edit/verification.txt',
 480                 {'username': user.username,
 481                     'verification_url': EMAIL_VERIFICATION_TEMPLATE.format(
 482                     uri=request.urlgen('mediagoblin.edit.verify_email',
 483                                     qualified=True),
 484                     verification_key=verification_key)})
 485
 486             email_debug_message(request)
 487             auth_tools.send_verification_email(user, request, new_email,
 488                                             rendered_email)
 489
 490             return redirect(request, 'mediagoblin.edit.account')
 491
 492     return render_to_response(
 493         request,
 494         'mediagoblin/edit/change_email.html',
 495         {'form': form,
 496          'user': user})
 497
 498 @user_has_privilege(u'admin')
 499 @require_active_login
 500 @get_media_entry_by_id
 501 def edit_metadata(request, media):
 502     form = forms.EditMetaDataForm(request.form)
 503     if request.method == "POST" and form.validate():
 504         metadata_dict = dict([(row['identifier'],row['value'])
 505                             for row in form.media_metadata.data])
 506         json_ld_metadata = None
 507         json_ld_metadata = compact_and_validate(metadata_dict)
 508         media.media_metadata = json_ld_metadata
 509         media.save()
 510         return redirect_obj(request, media)
 511
 512     if len(form.media_metadata) == 0:
 513         for identifier, value in six.iteritems(media.media_metadata):
 514             if identifier == "@context": continue
 515             form.media_metadata.append_entry({
 516                 'identifier':identifier,
 517                 'value':value})
 518
 519     return render_to_response(
 520         request,
 521         'mediagoblin/edit/metadata.html',
 522         {'form':form,
 523          'media':media})