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
|
# frozen_string_literal: true
module Diaspora
module Federation
module Receive
extend Diaspora::Logging
def self.perform(entity)
public_send(Mappings.receiver_for(entity), entity)
end
def self.handle_closed_recipient(sender, recipient)
return unless recipient.closed_account?
entity = recipient.person.account_migration || recipient.person.account_deletion
Diaspora::Federation::Dispatcher.build(recipient, entity, subscribers: [sender]).dispatch if entity.present?
raise Diaspora::Federation::RecipientClosed
end
def self.account_deletion(entity)
person = author_of(entity)
AccountDeletion.create!(person: person) unless AccountDeletion.where(person: person).exists?
rescue => e # rubocop:disable Lint/RescueWithoutErrorClass
raise e unless AccountDeletion.where(person: person).exists?
logger.warn "ignoring error on receive AccountDeletion:#{entity.author}: #{e.class}: #{e.message}"
end
def self.account_migration(entity)
old_person = author_of(entity)
profile = profile(entity.profile)
return if AccountMigration.exists?(old_person: old_person, new_person: profile.person)
AccountMigration.create!(
old_person: old_person,
new_person: profile.person,
remote_photo_path: entity.remote_photo_path
).tap do |migration|
migration.signature = entity.signature if old_person.local?
migration.save!
end
rescue StandardError => e
raise e unless AccountMigration.exists?(old_person: old_person, new_person: profile.person)
logger.warn "ignoring error on receive #{entity}: #{e.class}: #{e.message}"
nil
end
def self.comment(entity)
receive_relayable(Comment, entity) do
Comment.new(
author: author_of(entity),
guid: entity.guid,
created_at: entity.created_at,
text: entity.text,
commentable: Post.find_by(guid: entity.parent_guid)
)
end
end
def self.contact(entity)
recipient = Person.find_by(diaspora_handle: entity.recipient).owner
if entity.sharing
Contact.create_or_update_sharing_contact(recipient, author_of(entity))
else
recipient.disconnected_by(author_of(entity))
nil
end
end
def self.conversation(entity)
author = author_of(entity)
ignore_existing_guid(Conversation, entity.guid, author) do
Conversation.create!(
author: author,
guid: entity.guid,
subject: entity.subject,
created_at: entity.created_at,
participant_handles: entity.participants,
messages: entity.messages.map {|message| build_message(message) }
)
end
end
def self.like(entity)
receive_relayable(Like, entity) do
Like.new(
author: author_of(entity),
guid: entity.guid,
positive: entity.positive,
target: Mappings.model_class_for(entity.parent_type).find_by(guid: entity.parent_guid)
)
end
end
def self.message(entity)
ignore_existing_guid(Message, entity.guid, author_of(entity)) do
build_message(entity).tap(&:save!)
end
end
def self.participation(entity)
author = author_of(entity)
ignore_existing_guid(Participation, entity.guid, author) do
Participation.create!(
author: author,
guid: entity.guid,
target: Mappings.model_class_for(entity.parent_type).find_by(guid: entity.parent_guid)
)
end
end
def self.photo(entity)
author = author_of(entity)
persisted_photo = load_from_database(Photo, entity.guid, author)
if persisted_photo
persisted_photo.tap do |photo|
photo.update_attributes(
text: entity.text,
public: entity.public,
created_at: entity.created_at,
remote_photo_path: entity.remote_photo_path,
remote_photo_name: entity.remote_photo_name,
status_message_guid: entity.status_message_guid,
height: entity.height,
width: entity.width
)
end
else
save_photo(entity)
end
end
def self.poll_participation(entity)
receive_relayable(PollParticipation, entity) do
PollParticipation.new(
author: author_of(entity),
guid: entity.guid,
poll: Poll.find_by(guid: entity.parent_guid),
poll_answer_guid: entity.poll_answer_guid
)
end
end
def self.profile(entity)
author_of(entity).profile.tap do |profile|
profile.update_attributes(
first_name: entity.first_name,
last_name: entity.last_name,
image_url: entity.image_url,
image_url_medium: entity.image_url_medium,
image_url_small: entity.image_url_small,
birthday: entity.birthday,
gender: entity.gender,
bio: entity.bio,
location: entity.location,
searchable: entity.searchable,
nsfw: entity.nsfw,
tag_string: entity.tag_string,
public_details: entity.public
)
end
end
def self.reshare(entity)
author = author_of(entity)
ignore_existing_guid(Reshare, entity.guid, author) do
Reshare.create!(
author: author,
guid: entity.guid,
created_at: entity.created_at,
root_guid: entity.root_guid
).tap {|reshare| send_participation_for(reshare) }
end
end
def self.retraction(entity, recipient_id)
model_class = Diaspora::Federation::Mappings.model_class_for(entity.target_type)
object = model_class.where(guid: entity.target_guid).take!
case object
when Person
User.find(recipient_id).disconnected_by(object)
when Diaspora::Relayable
if object.root.author.local?
root_author = object.root.author.owner
retraction = Retraction.for(object)
retraction.defer_dispatch(root_author, false)
retraction.perform
else
object.destroy!
end
else
object.destroy!
end
end
def self.status_message(entity)
try_load_existing_guid(StatusMessage, entity.guid, author_of(entity)) do
StatusMessage.new(
author: author_of(entity),
guid: entity.guid,
text: entity.text,
public: entity.public,
created_at: entity.created_at,
provider_display_name: entity.provider_display_name
).tap do |status_message|
status_message.location = build_location(entity.location) if entity.location
status_message.poll = build_poll(entity.poll) if entity.poll
status_message.photos = save_or_load_photos(entity.photos)
status_message.save!
send_participation_for(status_message)
end
end
end
private_class_method def self.author_of(entity)
Person.by_account_identifier(entity.author)
end
private_class_method def self.build_location(entity)
Location.new(
address: entity.address,
lat: entity.lat,
lng: entity.lng
)
end
private_class_method def self.build_message(entity)
Message.new(
author: author_of(entity),
guid: entity.guid,
text: entity.text,
created_at: entity.created_at,
conversation_guid: entity.conversation_guid
)
end
private_class_method def self.build_poll(entity)
Poll.new(
guid: entity.guid,
question: entity.question
).tap do |poll|
poll.poll_answers = entity.poll_answers.map do |answer|
PollAnswer.new(
guid: answer.guid,
answer: answer.answer,
poll: poll
)
end
end
end
private_class_method def self.save_photo(entity)
Photo.create!(
author: author_of(entity),
guid: entity.guid,
text: entity.text,
public: entity.public,
created_at: entity.created_at,
remote_photo_path: entity.remote_photo_path,
remote_photo_name: entity.remote_photo_name,
status_message_guid: entity.status_message_guid,
height: entity.height,
width: entity.width
)
end
private_class_method def self.save_or_load_photos(photos)
photos.map do |photo|
try_load_existing_guid(Photo, photo.guid, author_of(photo)) { save_photo(photo) }
end
end
private_class_method def self.receive_relayable(klass, entity)
save_relayable(klass, entity) { yield }.tap {|relayable| relay_relayable(relayable) if relayable }
end
private_class_method def self.save_relayable(klass, entity)
ignore_existing_guid(klass, entity.guid, author_of(entity)) do
yield.tap do |relayable|
retract_if_author_ignored(relayable)
relayable.signature = build_signature(klass, entity) if relayable.root.author.local?
relayable.save!
end
end
end
# This are property names that are known by the +diaspora_federation+ library as properties but not
# specially stored in our database and therefore need to be stored in the +additional_data+ field.
UNKNOWN_PROPERTIES_NAMES = %i[edited_at].freeze
private_constant :UNKNOWN_PROPERTIES_NAMES
private_class_method def self.build_signature(klass, entity)
special_additional_data = UNKNOWN_PROPERTIES_NAMES.map {|name|
[name.to_s, entity.public_send(name)] if entity.respond_to?(name) && entity.signature_order.include?(name)
}.compact.to_h
klass.reflect_on_association(:signature).klass.new(
author_signature: entity.author_signature,
additional_data: entity.additional_data.merge(special_additional_data),
signature_order: SignatureOrder.find_or_create_by!(order: entity.signature_order.join(" "))
)
end
private_class_method def self.retract_if_author_ignored(relayable)
root_author = relayable.root.author.owner
return unless root_author && root_author.ignored_people.include?(relayable.author)
retraction = Retraction.for(relayable)
Diaspora::Federation::Dispatcher.build(root_author, retraction, subscribers: [relayable.author]).dispatch
raise Diaspora::Federation::AuthorIgnored
end
private_class_method def self.relay_relayable(relayable)
root_author = relayable.root.author.owner
Diaspora::Federation::Dispatcher.defer_dispatch(root_author, relayable) if root_author
end
# check if the object already exists, otherwise save it.
# if save fails (probably because of a second object received parallel),
# check again if an object with the same guid already exists, but maybe has a different author.
# @raise [InvalidAuthor] if the author of the existing object doesn't match
private_class_method def self.ignore_existing_guid(klass, guid, author)
yield unless klass.where(guid: guid, author_id: author.id).exists?
rescue => e
raise e unless load_from_database(klass, guid, author)
logger.warn "ignoring error on receive #{klass}:#{guid}: #{e.class}: #{e.message}"
nil
end
# try to load the object first from the DB and if not available, save it.
# if save fails (probably because of a second object received parallel),
# try again to load it, because it is possibly there now.
# @raise [InvalidAuthor] if the author of the existing object doesn't match
private_class_method def self.try_load_existing_guid(klass, guid, author)
load_from_database(klass, guid, author) || yield
rescue Diaspora::Federation::InvalidAuthor => e
raise e # don't try loading from db twice
rescue => e
logger.warn "failed to save #{klass}:#{guid} (#{e.class}: #{e.message}) - try loading it from DB"
load_from_database(klass, guid, author).tap do |object|
raise e unless object
end
end
# @raise [InvalidAuthor] if the author of the loaded object doesn't match
private_class_method def self.load_from_database(klass, guid, author)
klass.find_by(guid: guid).tap do |object|
if object && object.author_id != author.id
raise Diaspora::Federation::InvalidAuthor, "#{klass}:#{guid}: #{author.diaspora_handle}"
end
end
end
private_class_method def self.send_participation_for(post)
return unless post.public?
user = user_for_participation
participation = Participation.new(target: post, author: user.person)
Diaspora::Federation::Dispatcher.build(user, participation, subscribers: [post.author]).dispatch
rescue => e # rubocop:disable Lint/RescueWithoutErrorClass
logger.warn "failed to send participation for post #{post.guid}: #{e.class}: #{e.message}"
end
# Use configured admin account if available,
# or use first user with admin role if available,
# or use first user who isn't closed
private_class_method def self.user_for_participation
User.find_by(username: AppConfig.admins.account.to_s) ||
Role.admins.first&.person&.owner ||
User.where(locked_at: nil).first
end
end
end
end
|