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# Labels::TransferService class
#
# User for recreate the missing group labels at project level
#
module Labels
class TransferService
def initialize(current_user, old_group, project)
@current_user = current_user
@old_group = old_group
@project = project
end
def execute
return unless old_group.present?
Label.transaction do
labels_to_transfer.find_each do |label|
new_label_id = find_or_create_label!(label)
next if new_label_id == label.id
update_label_links(group_labels_applied_to_issues, old_label_id: label.id, new_label_id: new_label_id)
update_label_links(group_labels_applied_to_merge_requests, old_label_id: label.id, new_label_id: new_label_id)
update_label_priorities(old_label_id: label.id, new_label_id: new_label_id)
end
end
end
private
attr_reader :current_user, :old_group, :project
def labels_to_transfer
label_ids = []
label_ids << group_labels_applied_to_issues.select(:id)
label_ids << group_labels_applied_to_merge_requests.select(:id)
union = Gitlab::SQL::Union.new(label_ids)
Label.where("labels.id IN (#{union.to_sql})").reorder(nil).uniq
end
def group_labels_applied_to_issues
Label.joins(:issues).
where(
issues: { project_id: project.id },
labels: { type: 'GroupLabel', group_id: old_group.id }
)
end
def group_labels_applied_to_merge_requests
Label.joins(:merge_requests).
where(
merge_requests: { target_project_id: project.id },
labels: { type: 'GroupLabel', group_id: old_group.id }
)
end
def find_or_create_label!(label)
params = label.attributes.slice('title', 'description', 'color')
new_label = FindOrCreateService.new(current_user, project, params).execute
new_label.id
end
def update_label_links(labels, old_label_id:, new_label_id:)
LabelLink.joins(:label).
merge(labels).
where(label_id: old_label_id).
update_all(label_id: new_label_id)
end
def update_label_priorities(old_label_id:, new_label_id:)
LabelPriority.where(project_id: project.id, label_id: old_label_id).
update_all(label_id: new_label_id)
end
end
end
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