/
page_permission_actions.py
408 lines (324 loc) · 12.8 KB
/
page_permission_actions.py
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
import json
import logging
from abc import ABC, abstractmethod
from dataclasses import dataclass
from enum import StrEnum
from typing import Any
from django.contrib.auth import get_user_model
from django.core.exceptions import PermissionDenied
from django.http import HttpRequest, HttpResponse
from django.shortcuts import render
from django.utils.translation import gettext as _
from django.views.decorators.http import require_POST
from ...decorators import permission_required
from ...forms import PageForm
from ...models import Page, Region, User
logger = logging.getLogger(__name__)
@require_POST
@permission_required("cms.change_page")
@permission_required("cms.grant_page_permissions")
# pylint: disable=unused-argument
def grant_page_permission_ajax(request: HttpRequest, region_slug: str) -> HttpResponse:
"""
Grant a user editing or publishing permissions on a specific page object
:param request: The current request
:param region_slug: The slug of the current region
:raises ~django.core.exceptions.PermissionDenied: If page permissions are disabled for this region or the user does
not have the permission to grant page permissions
:return: The rendered page permission table
"""
try:
data = json.loads(request.body.decode("utf-8"))
permission = get_permission(data)
page = Page.objects.get(id=data.get("page_id"))
user = get_user_model().objects.get(id=data.get("user_id"))
log_permission_request(request, user, permission, page, grant=True)
ensure_page_specific_permissions_enabled(page.region)
ensure_user_has_correct_permissions(request, page, user)
permission_message = permission.grant_permission(user, page)
except PermissionDenied as e:
logger.exception(e)
permission_message = PermissionMessage(
"An error has occurred. Please contact an administrator.",
MessageLevel.ERROR,
)
if permission_message:
logger.debug(permission_message.message)
return __render_response(request, page, permission_message)
@require_POST
@permission_required("cms.change_page")
@permission_required("cms.grant_page_permissions")
# pylint: disable=unused-argument
def revoke_page_permission_ajax(request: HttpRequest, region_slug: str) -> HttpResponse:
"""
Remove a page permission for a given user and page
:param request: The current request
:param region_slug: The slug of the current region
:raises ~django.core.exceptions.PermissionDenied: If page permissions are disabled for this region or the user does
not have the permission to revoke page permissions
:return: The rendered page permission table
"""
try:
data = json.loads(request.body.decode("utf-8"))
permission = get_permission(data)
page = Page.objects.get(id=data.get("page_id"))
user = get_user_model().objects.get(id=data.get("user_id"))
log_permission_request(request, user, permission, page, grant=False)
ensure_page_specific_permissions_enabled(page.region)
ensure_user_has_correct_permissions(request, page, user)
permission_message = permission.revoke_permission(user, page)
except PermissionDenied as e:
logger.exception(e)
permission_message = PermissionMessage(
_("An error has occurred. Please contact an administrator."),
MessageLevel.ERROR,
)
logger.debug(permission_message)
return __render_response(request, page, permission_message)
class MessageLevel(StrEnum):
"""
Enum for different level tags of a message
"""
WARNING = "warning"
INFO = "info"
SUCCESS = "success"
ERROR = "error"
@dataclass
class PermissionMessage:
"""
Saves message and level_tag of the return message
"""
def __init__(
self,
message: str,
level_tag: MessageLevel,
):
self.message = message
self.level_tag = level_tag
class AbstractPagePermission(ABC):
"""
An abstract class to handle page permissions
"""
def __init__(self, permission: str):
self.permission = permission
@property
@abstractmethod
def grant_success_message(self) -> str:
"""
Success message for granting a permission
:return: success message
"""
@property
@abstractmethod
def revoke_success_message(self) -> str:
"""
Success message for revoking a permission
:return: success message
"""
@property
@abstractmethod
def revoke_with_no_effect_success_message(self) -> str:
"""
Success message for granting a permission without effect
:return: success message
"""
def grant_permission(self, user: User, page: Page) -> PermissionMessage:
"""
Grant the permission
:param user: User the permission is changed for
:param page: Page the permission is changed for
:return: Response message
"""
if not user.has_perm("cms.view_page"):
return PermissionMessage(
_(
"Page-specific permissions cannot be granted to users "
"who do not have permission to view pages (e.g event managers)."
),
MessageLevel.WARNING,
)
message = self.build_grant_message(user, page)
self.save_grant_permission(user, page)
return message
def revoke_permission(self, user: User, page: Page) -> PermissionMessage:
"""
Revoke the permission
:param user: User the permission is changed for
:param page: Page the permission is changed for
:return: Response message
"""
self.save_revoke_permission(user, page)
return self.build_revoke_message(user, page)
def build_grant_message(self, user: User, page: Page) -> PermissionMessage:
"""
Build the success message when granting a permission
:param user: user that is granted a permission
:param page: page the user is granted the permission for
:return: message with level_tag
"""
if user.has_perm(self.permission, page):
message = _(
'Information: The user "{}" has this permission already.'
).format(user.full_user_name)
level_tag = MessageLevel.INFO
else:
message = self.grant_success_message.format(user.full_user_name)
level_tag = MessageLevel.SUCCESS
return PermissionMessage(message, level_tag)
def build_revoke_message(self, user: User, page: Page) -> PermissionMessage:
"""
Build the response message after revoking
:param user: User the permission is changed for
:param page: Page the permission is changed for
:return: permission message
"""
if user.has_perm(self.permission, page):
message = self.revoke_with_no_effect_success_message.format(
user.full_user_name
)
level_tag = MessageLevel.INFO
else:
message = self.revoke_success_message.format(user.full_user_name)
level_tag = MessageLevel.SUCCESS
return PermissionMessage(message, level_tag)
@abstractmethod
def save_grant_permission(self, user: User, page: Page) -> None:
"""
Grant the permission and save changes
:param user: User the permission should be changed for
:param page: Page the permission should be changed for
"""
@abstractmethod
def save_revoke_permission(self, user: User, page: Page) -> None:
"""
Revoke the permission and save changes
:param user: User the permission should be changed for
:param page: Page the permission should be changed for
"""
class EditPagePermission(AbstractPagePermission):
"""
Implementation of AbstractPagePermission for editing page permissions
"""
def __init__(self) -> None:
super().__init__("cms.change_page_object")
grant_success_message = _('Success: The user "{}" can now edit this page.')
revoke_success_message = _('Success: The user "{}" cannot edit this page anymore.')
revoke_with_no_effect_success_message = _(
'Information: The user "{}" has been removed from the authors of '
"this page, but has the implicit permission to edit this page anyway."
)
def save_grant_permission(self, user: User, page: Page) -> None:
page.authors.add(user)
page.save()
def save_revoke_permission(self, user: User, page: Page) -> None:
if user in page.authors.all():
page.authors.remove(user)
page.save()
class PublishPagePermission(AbstractPagePermission):
"""
Implementation of AbstractPagePermission for publishing page permissions
"""
def __init__(self) -> None:
super().__init__("cms.publish_page_object")
grant_success_message = _('Success: The user "{}" can now publish this page.')
revoke_success_message = _(
'Success: The user "{}" cannot publish this page anymore.'
)
revoke_with_no_effect_success_message = _(
'Information: The user "{}" has been removed from the editors of '
"this page, but has the implicit permission to publish this page anyway."
)
def save_grant_permission(self, user: User, page: Page) -> None:
page.editors.add(user)
page.save()
def save_revoke_permission(self, user: User, page: Page) -> None:
if user in page.editors.all():
page.editors.remove(user)
page.save()
def __render_response(
request: HttpRequest, page: Page, permission_message: PermissionMessage
) -> HttpResponse:
return render(
request,
"pages/_page_permission_table.html",
{
"page": page,
"page_form": PageForm(
instance=page,
additional_instance_attributes={
"region": page.region,
},
),
"permission_message": permission_message,
},
)
def log_permission_request(
request: HttpRequest,
user: User,
permission: AbstractPagePermission,
page: Page,
grant: bool,
) -> None:
"""
Logging for page permission request
:param request: Request
:param user: user that should be granted or revoked a permission
:param permission: permission that should be granted or revoked
:param page: page for which the permission should be granted or revoked
:param grant: if the permission is granted or revoked
"""
logger.debug(
"[AJAX] %r wants to %r %r the permission to %s %r",
request.user,
"grant" if grant else "revoke",
user,
permission,
page,
)
def ensure_page_specific_permissions_enabled(region: Region) -> None:
"""
Ensure the page permission is enabled
:param region: The region the page permission should be enabled for
:raises ~django.core.exceptions.PermissionDenied: If page permissions are disabled for this region
"""
if not region.page_permissions_enabled:
raise PermissionDenied(f"Page permissions are not activated for {region!r}")
def ensure_user_has_correct_permissions(
request: HttpRequest, page: Page, user: User
) -> None:
"""
Ensure the user has correct permissions
:param request: request
:param page: page the permission should be changed for
:param user: user the permission should be changed for
:raises ~django.core.exceptions.PermissionDenied: If the user does not have the permission to grant page permissions
"""
if not (request.user.is_superuser or request.user.is_staff):
if page.region not in request.user.regions.all():
logger.warning(
"Error: %r cannot grant permissions for %r",
request.user,
page.region,
)
raise PermissionDenied
if page.region not in user.regions.all():
logger.warning(
"Error: %r cannot receive permissions for %r",
user,
page.region,
)
raise PermissionDenied
def get_permission(data: Any) -> AbstractPagePermission:
"""
Gets the Permission object for the requested permission
:param data: Request data
:raises ~django.core.exceptions.PermissionDenied: If unknown page permissions should be changed
:return: Permission object
"""
permission = data.get("permission")
if permission == "edit":
return EditPagePermission()
if permission == "publish":
return PublishPagePermission()
logger.warning("Error: The permission %r is not supported", permission)
raise PermissionDenied