133 lines
5 KiB
Ruby
133 lines
5 KiB
Ruby
module Gitlab
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module ImportExport
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class ProjectTreeRestorer
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def initialize(user:, shared:, project:)
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@path = File.join(shared.export_path, 'project.json')
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@user = user
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@shared = shared
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@project = project
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end
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def restore
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begin
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json = IO.read(@path)
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@tree_hash = ActiveSupport::JSON.decode(json)
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rescue => e
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Rails.logger.error("Import/Export error: #{e.message}")
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raise Gitlab::ImportExport::Error.new('Incorrect JSON format')
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end
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@project_members = @tree_hash.delete('project_members')
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ActiveRecord::Base.no_touching do
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create_relations
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end
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rescue => e
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@shared.error(e)
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false
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end
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def restored_project
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@restored_project ||= restore_project
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end
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private
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def members_mapper
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@members_mapper ||= Gitlab::ImportExport::MembersMapper.new(exported_members: @project_members,
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user: @user,
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project: restored_project)
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end
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# Loops through the tree of models defined in import_export.yml and
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# finds them in the imported JSON so they can be instantiated and saved
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# in the DB. The structure and relationships between models are guessed from
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# the configuration yaml file too.
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# Finally, it updates each attribute in the newly imported project.
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def create_relations
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saved = []
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default_relation_list.each do |relation|
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next unless relation.is_a?(Hash) || @tree_hash[relation.to_s].present?
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create_sub_relations(relation, @tree_hash) if relation.is_a?(Hash)
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relation_key = relation.is_a?(Hash) ? relation.keys.first : relation
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relation_hash = create_relation(relation_key, @tree_hash[relation_key.to_s])
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saved << restored_project.append_or_update_attribute(relation_key, relation_hash)
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end
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saved.all?
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end
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def default_relation_list
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Gitlab::ImportExport::Reader.new(shared: @shared).tree.reject do |model|
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model.is_a?(Hash) && model[:project_members]
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end
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end
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def restore_project
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return @project unless @tree_hash
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@project.update(project_params)
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@project
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end
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def project_params
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@tree_hash.reject do |key, value|
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# return params that are not 1 to many or 1 to 1 relations
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value.is_a?(Array) || key == key.singularize
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end
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end
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# Given a relation hash containing one or more models and its relationships,
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# loops through each model and each object from a model type and
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# and assigns its correspondent attributes hash from +tree_hash+
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# Example:
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# +relation_key+ issues, loops through the list of *issues* and for each individual
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# issue, finds any subrelations such as notes, creates them and assign them back to the hash
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#
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# Recursively calls this method if the sub-relation is a hash containing more sub-relations
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def create_sub_relations(relation, tree_hash)
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relation_key = relation.keys.first.to_s
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return if tree_hash[relation_key].blank?
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[tree_hash[relation_key]].flatten.each do |relation_item|
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relation.values.flatten.each do |sub_relation|
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# We just use author to get the user ID, do not attempt to create an instance.
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next if sub_relation == :author
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create_sub_relations(sub_relation, relation_item) if sub_relation.is_a?(Hash)
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relation_hash, sub_relation = assign_relation_hash(relation_item, sub_relation)
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relation_item[sub_relation.to_s] = create_relation(sub_relation, relation_hash) unless relation_hash.blank?
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end
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end
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end
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def assign_relation_hash(relation_item, sub_relation)
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if sub_relation.is_a?(Hash)
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relation_hash = relation_item[sub_relation.keys.first.to_s]
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sub_relation = sub_relation.keys.first
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else
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relation_hash = relation_item[sub_relation.to_s]
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end
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[relation_hash, sub_relation]
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end
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def create_relation(relation, relation_hash_list)
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relation_array = [relation_hash_list].flatten.map do |relation_hash|
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Gitlab::ImportExport::RelationFactory.create(relation_sym: relation.to_sym,
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relation_hash: parsed_relation_hash(relation_hash),
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members_mapper: members_mapper,
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user: @user,
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project_id: restored_project.id)
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end
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relation_hash_list.is_a?(Array) ? relation_array : relation_array.first
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end
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def parsed_relation_hash(relation_hash)
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relation_hash.merge!('group_id' => restored_project.group.try(:id), 'project_id' => restored_project.id)
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end
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end
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end
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end
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