summaryrefslogtreecommitdiff
path: root/app/services/notification_recipient_service.rb
blob: 4389fd8953811053ddb7aeb5aac8fa39ec4ba1d5 (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
# frozen_string_literal: true

#
# Used by NotificationService to determine who should receive notification
#
module NotificationRecipientService
  def self.notifiable_users(users, *args)
    users.compact.map { |u| NotificationRecipient.new(u, *args) }.select(&:notifiable?).map(&:user)
  end

  def self.notifiable?(user, *args)
    NotificationRecipient.new(user, *args).notifiable?
  end

  def self.build_recipients(*args)
    Builder::Default.new(*args).notification_recipients
  end

  def self.build_new_note_recipients(*args)
    Builder::NewNote.new(*args).notification_recipients
  end

  def self.build_merge_request_unmergeable_recipients(*args)
    Builder::MergeRequestUnmergeable.new(*args).notification_recipients
  end

  module Builder
    class Base
      def initialize(*)
        raise 'abstract'
      end

      def build!
        raise 'abstract'
      end

      def filter!
        recipients.select!(&:notifiable?)
      end

      def acting_user
        current_user
      end

      def target
        raise 'abstract'
      end

      def project
        target.project
      end

      def group
        project&.group || target.try(:group)
      end

      def recipients
        @recipients ||= []
      end

      def add_recipients(users, type, reason)
        if users.is_a?(ActiveRecord::Relation)
          users = users.includes(:notification_settings)
        end

        users = Array(users).compact
        recipients.concat(users.map { |u| make_recipient(u, type, reason) })
      end

      def user_scope
        User.includes(:notification_settings)
      end

      def make_recipient(user, type, reason)
        NotificationRecipient.new(
          user, type,
          reason: reason,
          project: project,
          group: group,
          custom_action: custom_action,
          target: target,
          acting_user: acting_user
        )
      end

      def notification_recipients
        @notification_recipients ||=
          begin
            build!
            filter!
            recipients = self.recipients.sort_by { |r| NotificationReason.priority(r.reason) }.uniq(&:user)
            recipients.freeze
          end
      end

      def custom_action
        nil
      end

      protected

      def add_participants(user)
        return unless target.respond_to?(:participants)

        add_recipients(target.participants(user), :participating, nil)
      end

      def add_mentions(user, target:)
        return unless target.respond_to?(:mentioned_users)

        add_recipients(target.mentioned_users(user), :mention, NotificationReason::MENTIONED)
      end

      # Get project/group users with CUSTOM notification level
      def add_custom_notifications
        user_ids = []

        # Users with a notification setting on group or project
        user_ids += user_ids_notifiable_on(project, :custom)
        user_ids += user_ids_notifiable_on(group, :custom)

        # Users with global level custom
        user_ids_with_project_level_global = user_ids_notifiable_on(project, :global)
        user_ids_with_group_level_global   = user_ids_notifiable_on(group, :global)

        global_users_ids = user_ids_with_project_level_global.concat(user_ids_with_group_level_global)
        user_ids += user_ids_with_global_level_custom(global_users_ids, custom_action)

        add_recipients(user_scope.where(id: user_ids), :watch, nil)
      end

      def add_project_watchers
        add_recipients(project_watchers, :watch, nil)
      end

      def add_group_watchers
        add_recipients(group_watchers, :watch, nil)
      end

      # Get project users with WATCH notification level
      def project_watchers
        project_members_ids = user_ids_notifiable_on(project)

        user_ids_with_project_global = user_ids_notifiable_on(project, :global)
        user_ids_with_group_global   = user_ids_notifiable_on(project.group, :global)

        user_ids = user_ids_with_global_level_watch((user_ids_with_project_global + user_ids_with_group_global).uniq)

        user_ids_with_project_setting = select_project_members_ids(user_ids_with_project_global, user_ids)
        user_ids_with_group_setting = select_group_members_ids(project.group, project_members_ids, user_ids_with_group_global, user_ids)

        user_scope.where(id: user_ids_with_project_setting.concat(user_ids_with_group_setting).uniq)
      end

      def group_watchers
        user_ids_with_group_global = user_ids_notifiable_on(group, :global)
        user_ids = user_ids_with_global_level_watch(user_ids_with_group_global)
        user_ids_with_group_setting = select_group_members_ids(group, [], user_ids_with_group_global, user_ids)

        user_scope.where(id: user_ids_with_group_setting)
      end

      def add_subscribed_users
        return unless target.respond_to? :subscribers

        add_recipients(target.subscribers(project), :subscription, nil)
      end

      def user_ids_notifiable_on(resource, notification_level = nil)
        return [] unless resource

        scope = resource.notification_settings

        if notification_level
          scope = scope.where(level: NotificationSetting.levels[notification_level])
        end

        scope.pluck(:user_id)
      end

      # Build a list of user_ids based on project notification settings
      def select_project_members_ids(global_setting, user_ids_global_level_watch)
        user_ids = user_ids_notifiable_on(project, :watch)

        # If project setting is global, add to watch list if global setting is watch
        user_ids + (global_setting & user_ids_global_level_watch)
      end

      # Build a list of user_ids based on group notification settings
      def select_group_members_ids(group, project_members, global_setting, user_ids_global_level_watch)
        uids = user_ids_notifiable_on(group, :watch)

        # Group setting is global, add to user_ids list if global setting is watch
        uids + (global_setting & user_ids_global_level_watch) - project_members
      end

      def user_ids_with_global_level_watch(ids)
        settings_with_global_level_of(:watch, ids).pluck(:user_id)
      end

      def user_ids_with_global_level_custom(ids, action)
        settings_with_global_level_of(:custom, ids).pluck(:user_id)
      end

      def settings_with_global_level_of(level, ids)
        NotificationSetting.where(
          user_id: ids,
          source_type: nil,
          level: NotificationSetting.levels[level]
        )
      end

      def add_labels_subscribers(labels: nil)
        return unless target.respond_to? :labels

        (labels || target.labels).each do |label|
          add_recipients(label.subscribers(project), :subscription, nil)
        end
      end
    end

    class Default < Base
      attr_reader :target
      attr_reader :current_user
      attr_reader :action
      attr_reader :previous_assignee
      attr_reader :skip_current_user
      def initialize(target, current_user, action:, custom_action: nil, previous_assignee: nil, skip_current_user: true)
        @target = target
        @current_user = current_user
        @action = action
        @custom_action = custom_action
        @previous_assignee = previous_assignee
        @skip_current_user = skip_current_user
      end

      def build!
        add_participants(current_user)
        add_project_watchers
        add_custom_notifications

        # Re-assign is considered as a mention of the new assignee
        case custom_action
        when :reassign_merge_request
          add_recipients(previous_assignee, :mention, nil)
          add_recipients(target.assignee, :mention, NotificationReason::ASSIGNED)
        when :reassign_issue
          previous_assignees = Array(previous_assignee)
          add_recipients(previous_assignees, :mention, nil)
          add_recipients(target.assignees, :mention, NotificationReason::ASSIGNED)
        end

        add_subscribed_users

        if [:new_issue, :new_merge_request].include?(custom_action)
          # These will all be participants as well, but adding with the :mention
          # type ensures that users with the mention notification level will
          # receive them, too.
          add_mentions(current_user, target: target)

          # Add the assigned users, if any
          assignees = case custom_action
                      when :new_issue
                        target.assignees
                      else
                        target.assignee
                      end

          # We use the `:participating` notification level in order to match existing legacy behavior as captured
          # in existing specs (notification_service_spec.rb ~ line 507)
          add_recipients(assignees, :participating, NotificationReason::ASSIGNED) if assignees

          add_labels_subscribers
        end
      end

      def acting_user
        current_user if skip_current_user
      end

      # Build event key to search on custom notification level
      # Check NotificationSetting::EMAIL_EVENTS
      def custom_action
        @custom_action ||= "#{action}_#{target.class.model_name.name.underscore}".to_sym
      end
    end

    class NewNote < Base
      attr_reader :note
      def initialize(note)
        @note = note
      end

      def target
        note.noteable
      end

      # NOTE: may be nil, in the case of a PersonalSnippet
      #
      # (this is okay because NotificationRecipient is written
      # to handle nil projects)
      def project
        note.project
      end

      def group
        if note.for_project_noteable?
          project.group
        else
          target.try(:group)
        end
      end

      def build!
        # Add all users participating in the thread (author, assignee, comment authors)
        add_participants(note.author)
        add_mentions(note.author, target: note)

        if note.for_project_noteable?
          # Merge project watchers
          add_project_watchers
        else
          add_group_watchers
        end

        add_custom_notifications
        add_subscribed_users
      end

      def custom_action
        :new_note
      end

      def acting_user
        note.author
      end
    end

    class MergeRequestUnmergeable < Base
      attr_reader :target
      def initialize(merge_request)
        @target = merge_request
      end

      def build!
        target.merge_participants.each do |user|
          add_recipients(user, :participating, nil)
        end
      end

      def custom_action
        :unmergeable_merge_request
      end

      def acting_user
        nil
      end
    end
  end
end