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|
# frozen_string_literal: true
module Issuables
class LabelFilter < BaseFilter
include Gitlab::Utils::StrongMemoize
extend Gitlab::Cache::RequestCache
def initialize(project:, group:, **kwargs)
@project = project
@group = group
super(**kwargs)
end
def filter(issuables)
filtered = by_label(issuables)
by_negated_label(filtered)
end
def label_names_excluded_from_priority_sort
label_names_from_params
end
private
# rubocop: disable CodeReuse/ActiveRecord
def by_label(issuables)
return issuables unless label_names_from_params.present?
target_model = issuables.base_class
if filter_by_no_label?
issuables.where(label_link_query(target_model).arel.exists.not)
elsif filter_by_any_label?
issuables.where(label_link_query(target_model).arel.exists)
else
issuables_with_selected_labels(issuables, label_names_from_params)
end
end
# rubocop: enable CodeReuse/ActiveRecord
def by_negated_label(issuables)
return issuables unless label_names_from_not_params.present?
issuables_without_selected_labels(issuables, label_names_from_not_params)
end
def filter_by_no_label?
label_names_from_params.map(&:downcase).include?(FILTER_NONE)
end
def filter_by_any_label?
label_names_from_params.map(&:downcase).include?(FILTER_ANY)
end
# rubocop: disable CodeReuse/ActiveRecord
def issuables_with_selected_labels(issuables, label_names)
target_model = issuables.base_class
if root_namespace
all_label_ids = find_label_ids(label_names)
# Found less labels in the DB than we were searching for. Return nothing.
return issuables.none if all_label_ids.size != label_names.size
all_label_ids.each do |label_ids|
issuables = issuables.where(label_link_query(target_model, label_ids: label_ids).arel.exists)
end
else
label_names.each do |label_name|
issuables = issuables.where(label_link_query(target_model, label_names: label_name).arel.exists)
end
end
issuables
end
# rubocop: enable CodeReuse/ActiveRecord
# rubocop: disable CodeReuse/ActiveRecord
def issuables_without_selected_labels(issuables, label_names)
target_model = issuables.base_class
if root_namespace
label_ids = find_label_ids(label_names).flatten(1)
return issuables if label_ids.empty?
issuables.where(label_link_query(target_model, label_ids: label_ids).arel.exists.not)
else
issuables.where(label_link_query(target_model, label_names: label_names).arel.exists.not)
end
end
# rubocop: enable CodeReuse/ActiveRecord
def find_label_ids(label_names)
find_label_ids_uncached(label_names)
end
# Avoid repeating label queries times when the finder is instantiated multiple times during the request.
request_cache(:find_label_ids) { root_namespace.id }
# This returns an array of label IDs per label name. It is possible for a label name
# to have multiple IDs because we allow labels with the same name if they are on a different
# project or group.
#
# For example, if we pass in `['bug', 'feature']`, this will return something like:
# `[ [1, 2], [3] ]`
#
# rubocop: disable CodeReuse/ActiveRecord
def find_label_ids_uncached(label_names)
return [] if label_names.empty?
group_labels = group_labels_for_root_namespace.where(title: label_names)
project_labels = project_labels_for_root_namespace.where(title: label_names)
Label
.from_union([group_labels, project_labels], remove_duplicates: false)
.reorder(nil)
.pluck(:title, :id)
.group_by(&:first)
.values
.map { |labels| labels.map(&:last) }
end
# rubocop: enable CodeReuse/ActiveRecord
# rubocop: disable CodeReuse/ActiveRecord
def group_labels_for_root_namespace
Label.where(project_id: nil).where(group_id: root_namespace.self_and_descendant_ids)
end
# rubocop: enable CodeReuse/ActiveRecord
# rubocop: disable CodeReuse/ActiveRecord
def project_labels_for_root_namespace
Label.where(group_id: nil).where(project_id: Project.select(:id).where(namespace_id: root_namespace.self_and_descendant_ids))
end
# rubocop: enable CodeReuse/ActiveRecord
# rubocop: disable CodeReuse/ActiveRecord
def label_link_query(target_model, label_ids: nil, label_names: nil)
relation = LabelLink.by_target_for_exists_query(target_model.name, target_model.arel_table['id'], label_ids)
relation = relation.joins(:label).where(labels: { name: label_names }) if label_names
relation
end
# rubocop: enable CodeReuse/ActiveRecord
def label_names_from_params
return if params[:label_name].blank?
strong_memoize(:label_names_from_params) do
split_label_names(params[:label_name])
end
end
def label_names_from_not_params
return if not_params.blank? || not_params[:label_name].blank?
strong_memoize(:label_names_from_not_params) do
split_label_names(not_params[:label_name])
end
end
def split_label_names(label_name_param)
label_name_param.is_a?(String) ? label_name_param.split(',') : label_name_param
end
def root_namespace
strong_memoize(:root_namespace) do
(@project || @group)&.root_ancestor
end
end
end
end
Issuables::LabelFilter.prepend_mod
|
