debian-mirror-gitlab/app/models/concerns/group_descendant.rb

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# frozen_string_literal: true
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module GroupDescendant
# Returns the hierarchy of a project or group in the from of a hash upto a
# given top.
#
# > project.hierarchy
# => { parent_group => { child_group => project } }
def hierarchy(hierarchy_top = nil, preloaded = nil)
preloaded ||= ancestors_upto(hierarchy_top)
expand_hierarchy_for_child(self, self, hierarchy_top, preloaded)
end
# Merges all hierarchies of the given groups or projects into an array of
# hashes. All ancestors need to be loaded into the given `descendants` to avoid
# queries down the line.
#
# > GroupDescendant.merge_hierarchy([project, child_group, child_group2, parent])
# => { parent => [{ child_group => project}, child_group2] }
def self.build_hierarchy(descendants, hierarchy_top = nil)
descendants = Array.wrap(descendants).uniq
return [] if descendants.empty?
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unless descendants.all?(GroupDescendant)
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raise ArgumentError, _('element is not a hierarchy')
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end
all_hierarchies = descendants.map do |descendant|
descendant.hierarchy(hierarchy_top, descendants)
end
Gitlab::Utils::MergeHash.merge(all_hierarchies)
end
private
def expand_hierarchy_for_child(child, hierarchy, hierarchy_top, preloaded)
parent = hierarchy_top if hierarchy_top && child.parent_id == hierarchy_top.id
parent ||= preloaded.detect { |possible_parent| possible_parent.is_a?(Group) && possible_parent.id == child.parent_id }
if parent.nil? && !child.parent_id.nil?
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parent = child.parent
exception = ArgumentError.new <<~MSG
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Parent was not preloaded for child when rendering group hierarchy.
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This error is not user facing, but causes a +1 query.
MSG
extras = {
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parent: parent.inspect,
child: child.inspect,
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preloaded: preloaded.map(&:full_path),
issue_url: 'https://gitlab.com/gitlab-org/gitlab-foss/issues/49404'
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}
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Gitlab::ErrorTracking.track_and_raise_for_dev_exception(exception, extras)
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end
if parent.nil? && hierarchy_top.present?
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raise ArgumentError, _('specified top is not part of the tree')
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end
if parent && parent != hierarchy_top
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expand_hierarchy_for_child(parent, { parent => hierarchy }, hierarchy_top, preloaded)
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else
hierarchy
end
end
end