summaryrefslogtreecommitdiff
path: root/app/finders/issuable_finder.rb
blob: 086dadcf5b7b96d0de0094fd7d4cdbe80fd7d455 (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
# frozen_string_literal: true

# IssuableFinder
#
# Used to filter Issues and MergeRequests collections by set of params
#
# Note: This class is NOT meant to be instantiated. Instead you should
#       look at IssuesFinder or EpicsFinder, which inherit from this.
#
# Arguments:
#   klass - actual class like Issue or MergeRequest
#   current_user - which user use
#   params:
#     scope: 'created_by_me' or 'assigned_to_me' or 'all'
#     state: 'opened' or 'closed' or 'locked' or 'all'
#     group_id: integer
#     project_id: integer
#     milestone_title: string
#     release_tag: string
#     author_id: integer
#     author_username: string
#     assignee_id: integer or 'None' or 'Any'
#     assignee_username: string
#     search: string
#     in: 'title', 'description', or a string joining them with comma
#     label_name: string
#     sort: string
#     non_archived: boolean
#     iids: integer[]
#     my_reaction_emoji: string
#     created_after: datetime
#     created_before: datetime
#     updated_after: datetime
#     updated_before: datetime
#     attempt_group_search_optimizations: boolean
#     attempt_project_search_optimizations: boolean
#
class IssuableFinder
  prepend FinderWithCrossProjectAccess
  include FinderMethods
  include CreatedAtFilter
  include Gitlab::Utils::StrongMemoize
  prepend OptimizedIssuableLabelFilter

  requires_cross_project_access unless: -> { params.project? }

  NEGATABLE_PARAMS_HELPER_KEYS = %i[project_id scope status include_subgroups].freeze

  attr_accessor :current_user, :params
  attr_reader :original_params
  attr_writer :parent

  delegate(*%i[milestones], to: :params)

  class << self
    def scalar_params
      @scalar_params ||= %i[
      assignee_id
      assignee_username
      author_id
      author_username
      label_name
      milestone_title
      release_tag
      my_reaction_emoji
      search
      in
    ]
    end

    def array_params
      @array_params ||= { label_name: [], assignee_username: [] }
    end

    # This should not be used in controller strong params!
    def negatable_scalar_params
      @negatable_scalar_params ||= scalar_params - %i[search in]
    end

    # This should not be used in controller strong params!
    def negatable_array_params
      @negatable_array_params ||= array_params.keys.append(:iids)
    end

    # This should not be used in controller strong params!
    def negatable_params
      @negatable_params ||= negatable_scalar_params + negatable_array_params
    end

    def valid_params
      @valid_params ||= scalar_params + [array_params.merge(or: {}, not: {})]
    end
  end

  def params_class
    IssuableFinder::Params
  end

  def klass
    raise NotImplementedError
  end

  def initialize(current_user, params = {})
    @current_user = current_user
    @original_params = params
    @params = params_class.new(params, current_user, klass)
  end

  def execute
    items = init_collection
    items = filter_items(items)

    # Let's see if we have to negate anything
    items = filter_negated_items(items) if should_filter_negated_args?

    # This has to be last as we use a CTE as an optimization fence
    # for counts by passing the force_cte param and passing the
    # attempt_group_search_optimizations param
    # https://www.postgresql.org/docs/current/static/queries-with.html
    items = by_search(items)

    sort(items)
  end

  def filter_items(items)
    # Selection by group is already covered by `by_project` and `projects` for project-based issuables
    # Group-based issuables have their own group filter methods
    items = by_project(items)
    items = by_scope(items)
    items = by_created_at(items)
    items = by_updated_at(items)
    items = by_closed_at(items)
    items = by_state(items)
    items = by_assignee(items)
    items = by_author(items)
    items = by_non_archived(items)
    items = by_iids(items)
    items = by_milestone(items)
    items = by_release(items)
    items = by_label(items)
    by_my_reaction_emoji(items)
  end

  def should_filter_negated_args?
    # API endpoints send in `nil` values so we test if there are any non-nil
    not_params.present? && not_params.values.any?
  end

  # Negates all params found in `negatable_params`
  def filter_negated_items(items)
    items = by_negated_label(items)
    items = by_negated_milestone(items)
    items = by_negated_release(items)
    items = by_negated_my_reaction_emoji(items)
    by_negated_iids(items)
  end

  def row_count
    Gitlab::IssuablesCountForState
      .new(self, nil, fast_fail: true)
      .for_state_or_opened(params[:state])
  end

  # We often get counts for each state by running a query per state, and
  # counting those results. This is typically slower than running one query
  # (even if that query is slower than any of the individual state queries) and
  # grouping and counting within that query.
  #
  # rubocop: disable CodeReuse/ActiveRecord
  def count_by_state
    count_params = params.merge(state: nil, sort: nil, force_cte: true)
    finder = self.class.new(current_user, count_params)

    counts = Hash.new(0)

    # Searching by label includes a GROUP BY in the query, but ours will be last
    # because it is added last. Searching by multiple labels also includes a row
    # per issuable, so we have to count those in Ruby - which is bad, but still
    # better than performing multiple queries.
    #
    # This does not apply when we are using a CTE for the search, as the labels
    # GROUP BY is inside the subquery in that case, so we set labels_count to 1.
    #
    # Groups and projects have separate feature flags to suggest the use
    # of a CTE. The CTE will not be used if the sort doesn't support it,
    # but will always be used for the counts here as we ignore sorting
    # anyway.
    labels_count = params.label_names.any? ? params.label_names.count : 1
    labels_count = 1 if use_cte_for_search?

    finder.execute.reorder(nil).group(:state_id).count.each do |key, value|
      counts[count_key(key)] += value / labels_count
    end

    counts[:all] = counts.values.sum

    counts.with_indifferent_access
  end
  # rubocop: enable CodeReuse/ActiveRecord

  def search
    params[:search].presence
  end

  def use_cte_for_search?
    strong_memoize(:use_cte_for_search) do
      next false unless search
      # Only simple unsorted & simple sorts can use CTE
      next false if params[:sort].present? && !params[:sort].in?(klass.simple_sorts.keys)

      attempt_group_search_optimizations? || attempt_project_search_optimizations?
    end
  end

  def parent_param=(obj)
    @parent = obj
    params[parent_param] = parent if parent
  end

  def parent_param
    case parent
    when Project
      :project_id
    when Group
      :group_id
    else
      raise "Unexpected parent: #{parent.class}"
    end
  end

  private

  attr_reader :parent

  def not_params
    strong_memoize(:not_params) do
      params_class.new(params[:not].dup, current_user, klass).tap do |not_params|
        next unless not_params.present?

        # These are "helper" params that modify the results, like :in and :search. They usually come in at the top-level
        # params, but if they do come in inside the `:not` params, the inner ones should take precedence.
        not_helpers = params.slice(*NEGATABLE_PARAMS_HELPER_KEYS).merge(params[:not].to_h.slice(*NEGATABLE_PARAMS_HELPER_KEYS))
        not_helpers.each do |key, value|
          not_params[key] = value unless not_params[key].present?
        end
      end
    end
  end

  def force_cte?
    !!params[:force_cte]
  end

  def init_collection
    klass.all
  end

  def attempt_group_search_optimizations?
    params[:attempt_group_search_optimizations]
  end

  def attempt_project_search_optimizations?
    params[:attempt_project_search_optimizations]
  end

  def count_key(value)
    # value may be an array if the finder used in `count_by_state` added an
    # additional `group by`. Anyway we are sure that state will be always the
    # last item because it's added as the last one to the query.
    value = Array(value).last
    klass.available_states.key(value)
  end

  # rubocop: disable CodeReuse/ActiveRecord
  def by_scope(items)
    return items.none if params.current_user_related? && !current_user

    case params[:scope]
    when 'created_by_me', 'authored'
      items.where(author_id: current_user.id)
    when 'assigned_to_me'
      items.assigned_to(current_user)
    else
      items
    end
  end
  # rubocop: enable CodeReuse/ActiveRecord

  def by_updated_at(items)
    items = items.updated_after(params[:updated_after]) if params[:updated_after].present?
    items = items.updated_before(params[:updated_before]) if params[:updated_before].present?

    items
  end

  def by_closed_at(items)
    items = items.closed_after(params[:closed_after]) if params[:closed_after].present?
    items = items.closed_before(params[:closed_before]) if params[:closed_before].present?

    items
  end

  def by_state(items)
    case params[:state].to_s
    when 'closed'
      items.closed
    when 'merged'
      items.respond_to?(:merged) ? items.merged : items.closed
    when 'opened'
      items.opened
    when 'locked'
      items.with_state(:locked)
    else
      items
    end
  end

  # rubocop: disable CodeReuse/ActiveRecord
  def by_project(items)
    if params.project?
      items.of_projects(params.projects).references_project
    elsif params.projects
      items.merge(params.projects.reorder(nil)).join_project
    else
      items.none
    end
  end
  # rubocop: enable CodeReuse/ActiveRecord

  # rubocop: disable CodeReuse/ActiveRecord
  def by_search(items)
    return items unless search
    return items if items.is_a?(ActiveRecord::NullRelation)

    if use_cte_for_search?
      cte = Gitlab::SQL::CTE.new(klass.table_name, items)

      items = klass.with(cte.to_arel).from(klass.table_name)
    end

    items.full_search(search, matched_columns: params[:in], use_minimum_char_limit: !use_cte_for_search?)
  end
  # rubocop: enable CodeReuse/ActiveRecord

  # rubocop: disable CodeReuse/ActiveRecord
  def by_iids(items)
    params[:iids].present? ? items.where(iid: params[:iids]) : items
  end
  # rubocop: enable CodeReuse/ActiveRecord

  # rubocop: disable CodeReuse/ActiveRecord
  def by_negated_iids(items)
    not_params[:iids].present? ? items.where.not(iid: not_params[:iids]) : items
  end
  # rubocop: enable CodeReuse/ActiveRecord

  # rubocop: disable CodeReuse/ActiveRecord
  def sort(items)
    # Ensure we always have an explicit sort order (instead of inheriting
    # multiple orders when combining ActiveRecord::Relation objects).
    params[:sort] ? items.sort_by_attribute(params[:sort], excluded_labels: params.label_names) : items.reorder(id: :desc)
  end
  # rubocop: enable CodeReuse/ActiveRecord

  def by_author(items)
    Issuables::AuthorFilter.new(
      params: original_params,
      or_filters_enabled: or_filters_enabled?
    ).filter(items)
  end

  def by_assignee(items)
    assignee_filter.filter(items)
  end

  def assignee_filter
    strong_memoize(:assignee_filter) do
      Issuables::AssigneeFilter.new(
        params: original_params,
        or_filters_enabled: or_filters_enabled?
      )
    end
  end

  # rubocop: disable CodeReuse/ActiveRecord
  def by_milestone(items)
    return items unless params.milestones?

    if params.filter_by_no_milestone?
      items.left_joins_milestones.where(milestone_id: [-1, nil])
    elsif params.filter_by_any_milestone?
      items.any_milestone
    elsif params.filter_by_upcoming_milestone?
      upcoming_ids = Milestone.upcoming_ids(params.projects, params.related_groups)
      items.left_joins_milestones.where(milestone_id: upcoming_ids)
    elsif params.filter_by_started_milestone?
      items.left_joins_milestones.merge(Milestone.started)
    else
      items.with_milestone(params[:milestone_title])
    end
  end
  # rubocop: enable CodeReuse/ActiveRecord

  # rubocop: disable CodeReuse/ActiveRecord
  def by_negated_milestone(items)
    return items unless not_params.milestones?

    if not_params.filter_by_upcoming_milestone?
      items.joins(:milestone).merge(Milestone.not_upcoming)
    elsif not_params.filter_by_started_milestone?
      items.joins(:milestone).merge(Milestone.not_started)
    else
      items.without_particular_milestone(not_params[:milestone_title])
    end
  end
  # rubocop: enable CodeReuse/ActiveRecord

  def by_release(items)
    return items unless params.releases?
    return items if params.group? # don't allow release filtering at group level

    if params.filter_by_no_release?
      items.without_release
    elsif params.filter_by_any_release?
      items.any_release
    else
      items.with_release(params[:release_tag], params[:project_id])
    end
  end

  def by_negated_release(items)
    return items unless not_params.releases?

    items.without_particular_release(not_params[:release_tag], not_params[:project_id])
  end

  def by_label(items)
    return items unless params.labels?

    if params.filter_by_no_label?
      items.without_label
    elsif params.filter_by_any_label?
      items.any_label(params[:sort])
    else
      items.with_label(params.label_names, params[:sort])
    end
  end

  def by_negated_label(items)
    return items unless not_params.labels?

    items.without_particular_labels(not_params.label_names)
  end

  def by_my_reaction_emoji(items)
    return items unless params[:my_reaction_emoji] && current_user

    if params.filter_by_no_reaction?
      items.not_awarded(current_user)
    elsif params.filter_by_any_reaction?
      items.awarded(current_user)
    else
      items.awarded(current_user, params[:my_reaction_emoji])
    end
  end

  def by_negated_my_reaction_emoji(items)
    return items unless not_params[:my_reaction_emoji] && current_user

    items.not_awarded(current_user, not_params[:my_reaction_emoji])
  end

  def by_non_archived(items)
    params[:non_archived].present? ? items.non_archived : items
  end

  def or_filters_enabled?
    strong_memoize(:or_filters_enabled) do
      Feature.enabled?(:or_issuable_queries, feature_flag_scope, default_enabled: :yaml)
    end
  end

  def feature_flag_scope
    params.group || params.project
  end
end