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# frozen_string_literal: true
module Gitlab
module ImportExport
module Project
# Given a class, it finds or creates a new object
# (initializes in the case of Label) at group or project level.
# If it does not exist in the group, it creates it at project level.
#
# Example:
# `ObjectBuilder.build(Label, label_attributes)`
# finds or initializes a label with the given attributes.
#
# It also adds some logic around Group Labels/Milestones for edge cases.
class ObjectBuilder < Base::ObjectBuilder
def self.build(*args)
::Project.transaction do
super
end
end
def initialize(klass, attributes)
super
@group = @attributes['group']
@project = @attributes['project']
end
def find
return if epic? && group.nil?
super
end
private
attr_reader :group, :project
def where_clauses
[
where_clause_base,
where_clause_for_title,
where_clause_for_klass
].compact
end
# Returns Arel clause `"{table_name}"."project_id" = {project.id}` if project is present
# For example: merge_request has :target_project_id, and we are searching by :iid
# or, if group is present:
# `"{table_name}"."project_id" = {project.id} OR "{table_name}"."group_id" = {group.id}`
def where_clause_base
[].tap do |clauses|
clauses << table[:project_id].eq(project.id) if project
clauses << table[:group_id].in(group.self_and_ancestors_ids) if group
end.reduce(:or)
end
# Returns Arel clause for a particular model or `nil`.
def where_clause_for_klass
return attrs_to_arel(attributes.slice('filename')).and(table[:issue_id].eq(nil)) if design?
attrs_to_arel(attributes.slice('iid')) if merge_request?
end
def prepare_attributes
attributes.dup.tap do |atts|
atts.delete('group') unless epic?
if label?
atts['type'] = 'ProjectLabel' # Always create project labels
elsif milestone?
if atts['group_id'] # Transform new group milestones into project ones
atts['iid'] = nil
atts.delete('group_id')
else
claim_iid
end
end
atts['importing'] = true if klass.ancestors.include?(Importable)
end
end
def label?
klass == Label
end
def milestone?
klass == Milestone
end
def merge_request?
klass == MergeRequest
end
def epic?
klass == Epic
end
def design?
klass == DesignManagement::Design
end
# If an existing group milestone used the IID
# claim the IID back and set the group milestone to use one available
# This is necessary to fix situations like the following:
# - Importing into a user namespace project with exported group milestones
# where the IID of the Group milestone could conflict with a project one.
def claim_iid
# The milestone has to be a group milestone, as it's the only case where
# we set the IID as the maximum. The rest of them are fixed.
milestone = project.milestones.find_by(iid: attributes['iid'])
return unless milestone
milestone.iid = nil
milestone.ensure_project_iid!
milestone.save!
end
end
end
end
end
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