117 lines
5 KiB
Ruby
117 lines
5 KiB
Ruby
module Gitlab
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module ImportExport
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class Reader
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attr_reader :tree
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def initialize(shared:)
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@shared = shared
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config_hash = YAML.load_file(Gitlab::ImportExport.config_file).deep_symbolize_keys
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@tree = config_hash[:project_tree]
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@attributes_finder = Gitlab::ImportExport::AttributesFinder.new(included_attributes: config_hash[:included_attributes],
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excluded_attributes: config_hash[:excluded_attributes],
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methods: config_hash[:methods])
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end
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# Outputs a hash in the format described here: http://api.rubyonrails.org/classes/ActiveModel/Serializers/JSON.html
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# for outputting a project in JSON format, including its relations and sub relations.
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def project_tree
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@attributes_finder.find_included(:project).merge(include: build_hash(@tree))
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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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private
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# Builds a hash in the format described here: http://api.rubyonrails.org/classes/ActiveModel/Serializers/JSON.html
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#
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# +model_list+ - List of models as a relation tree to be included in the generated JSON, from the _import_export.yml_ file
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def build_hash(model_list)
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model_list.map do |model_objects|
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if model_objects.is_a?(Hash)
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build_json_config_hash(model_objects)
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else
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@attributes_finder.find(model_objects)
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end
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end
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end
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# Called when the model is actually a hash containing other relations (more models)
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# Returns the config in the right format for calling +to_json+
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# +model_object_hash+ - A model relationship such as:
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# {:merge_requests=>[:merge_request_diff, :notes]}
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def build_json_config_hash(model_object_hash)
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@json_config_hash = {}
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model_object_hash.values.flatten.each do |model_object|
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current_key = model_object_hash.keys.first
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@attributes_finder.parse(current_key) { |hash| @json_config_hash[current_key] ||= hash }
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handle_model_object(current_key, model_object)
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process_sub_model(current_key, model_object) if model_object.is_a?(Hash)
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end
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@json_config_hash
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end
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# If the model is a hash, process the sub_models, which could also be hashes
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# If there is a list, add to an existing array, otherwise use hash syntax
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# +current_key+ main model that will be a key in the hash
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# +model_object+ model or list of models to include in the hash
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def process_sub_model(current_key, model_object)
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sub_model_json = build_json_config_hash(model_object).dup
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@json_config_hash.slice!(current_key)
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if @json_config_hash[current_key] && @json_config_hash[current_key][:include]
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@json_config_hash[current_key][:include] << sub_model_json
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else
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@json_config_hash[current_key] = { include: sub_model_json }
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end
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end
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# Creates or adds to an existing hash an individual model or list
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# +current_key+ main model that will be a key in the hash
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# +model_object+ model or list of models to include in the hash
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def handle_model_object(current_key, model_object)
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if @json_config_hash[current_key]
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add_model_value(current_key, model_object)
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else
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create_model_value(current_key, model_object)
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end
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end
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# Constructs a new hash that will hold the configuration for that particular object
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# It may include exceptions or other attribute detail configuration, parsed by +@attributes_finder+
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# +current_key+ main model that will be a key in the hash
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# +value+ existing model to be included in the hash
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def create_model_value(current_key, value)
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parsed_hash = { include: value }
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@attributes_finder.parse(value) do |hash|
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parsed_hash = { include: hash_or_merge(value, hash) }
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end
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@json_config_hash[current_key] = parsed_hash
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end
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# Adds new model configuration to an existing hash with key +current_key+
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# It may include exceptions or other attribute detail configuration, parsed by +@attributes_finder+
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# +current_key+ main model that will be a key in the hash
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# +value+ existing model to be included in the hash
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def add_model_value(current_key, value)
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@attributes_finder.parse(value) { |hash| value = { value => hash } }
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old_values = @json_config_hash[current_key][:include]
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@json_config_hash[current_key][:include] = ([old_values] + [value]).compact.flatten
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end
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# Construct a new hash or merge with an existing one a model configuration
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# This is to fulfil +to_json+ requirements.
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# +value+ existing model to be included in the hash
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# +hash+ hash containing configuration generated mainly from +@attributes_finder+
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def hash_or_merge(value, hash)
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value.is_a?(Hash) ? value.merge(hash) : { value => hash }
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end
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end
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end
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end
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