Class: Solis::Query::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/solis/query/run.rb

Class Method Summary collapse

Class Method Details

.build_objects_index(grouped) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 51

def self.build_objects_index(grouped)
  grouped.each_with_object({}) do |(subject, triples), index|
    obj = {
      '_id' => subject,                    # Full URI for resolution
      'id' => nil,                         # Will be set from predicate if exists
      '@subject' => subject,               # Internal marker for reference resolution
      '@type' => nil
    }

    triples.each do |triple|
      predicate = triple[:predicate]
      object = triple[:object]

      # Handle rdf:type
      if (predicate.to_s !~/#{graph_name}/ && predicate.to_s =~ /type$/i) || predicate == RDF::RDFV.type
        obj['@type'] = object.to_s.split('/').last
        next
      end

      # Get predicate name (last part of URI)
      pred_name = predicate.to_s.split('/').last.underscore

      # Extract value
      value = if object.is_a?(RDF::URI)
                { '@ref' => object.to_s } # Mark as reference for later resolution
              else
                extract_value(object)
              end

      # Capture the 'id' predicate value specifically
      if pred_name == 'id'
        obj['id'] = value
        next
      end

      # Handle multiple values for same predicate
      if obj.key?(pred_name)
        obj[pred_name] = [obj[pred_name]] unless obj[pred_name].is_a?(Array)
        obj[pred_name] << value
      else
        obj[pred_name] = value
      end
    end

    # Fallback: if no 'id' predicate was found, extract from URI
    if obj['id'].nil?
      obj['id'] = subject.split('/').last
    end

    if obj['@type'].nil?
      obj['@type'] = subject.split('/')[-2].classify
    end

    index[subject] = obj
  end
end

.direct_transform_with_embedding(client, entity, options = {}) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 23

def self.direct_transform_with_embedding(client, entity, options = {})
  results = client.query('select * where{?s ?p ?o}')

  # Step 1: Group all triples by subject
  grouped = group_by_subject(results)

  # Step 2: Build objects index (without embedding yet)
  objects_index = build_objects_index(grouped)

  # Step 3: Embed references recursively
  max_depth = options[:max_embed_depth] || 10
  root_subjects = find_root_subjects(grouped, entity)

  root_subjects.map do |subject|
    embed_references(objects_index[subject], objects_index, max_depth, Set.new)
  end.compact
end

.embed_references(obj, objects_index, max_depth, visited, current_depth = 0) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 121

def self.embed_references(obj, objects_index, max_depth, visited, current_depth = 0)
  return nil if obj.nil?

  subject = obj['@subject']

  # At max depth, return minimal reference with both IDs
  if current_depth >= max_depth
    #return { '_id' => obj['_id'], 'id' => obj['id'], '@type' => obj['@type'] }
    return { '_id' => obj['_id'], 'id' => obj['id'] }
  end

  # Circular reference detection
  if visited.include?(subject)
    # Return a reference object instead of embedding
    #return { '_id' => obj['_id'], 'id' => obj['id'], '@type' => obj['@type'] }
    return { '_id' => obj['_id'], 'id' => obj['id'] }
  end

  visited = visited.dup
  visited.add(subject)

  # Create clean copy without internal markers (except _id)
  result = {
    '_id' => obj['_id'],
    'id' => obj['id']
  }

  obj.each do |key, value|
    next if key.start_with?('@')  # Skip internal markers
    next if key == '_id' || key == 'id'  # Already added

    if obj.key?('@type') &&Solis::Options.instance.get[:solis].shape?(obj['@type'])
      entity = Solis::Options.instance.get[:solis].shape_as_model(obj['@type'])
      entity_maxcount = entity.metadata[:attributes][key][:maxcount]
    end
    resolved_value = resolve_value(value, objects_index, max_depth, visited, current_depth)
    resolved_value = [resolved_value] if (entity_maxcount.nil? || entity_maxcount > 1) && !resolved_value.is_a?(Array)

    result[key] = resolved_value
  end

  result
end

.extract_value(literal) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 190

def self.extract_value(literal)
  return literal.to_s if literal.is_a?(RDF::URI)

  datatype = literal.datatype&.to_s

  case datatype
  when "http://www.w3.org/2001/XMLSchema#dateTime"
    DateTime.parse(literal.value)
  when "http://www.w3.org/2001/XMLSchema#date"
    Date.parse(literal.value)
  when "http://www.w3.org/2001/XMLSchema#boolean"
    literal.value == "true"
  when "http://www.w3.org/2001/XMLSchema#integer", "http://www.w3.org/2001/XMLSchema#int"
    literal.value.to_i
  when "http://www.w3.org/2001/XMLSchema#float", "http://www.w3.org/2001/XMLSchema#double", "http://www.w3.org/2001/XMLSchema#decimal"
    literal.value.to_f
  when "http://www.w3.org/2006/time#DateTimeInterval"
    ISO8601::TimeInterval.parse(literal.value).to_s
  when "http://www.w3.org/1999/02/22-rdf-syntax-ns#JSON"
    JSON.parse(literal.value) rescue literal.value
  when /datatypes\/edtf/, /edtf$/i
    # Return EDTF string representation
    literal.value.to_s
  else
    # Handle language-tagged strings
    if literal.respond_to?(:language) && literal.language
      { '@value' => literal.value, '@language' => literal.language.to_s }
    else
      literal.value
    end
  end
rescue StandardError => e
  Solis::LOGGER.warn("Error extracting value: #{e.message}")
  literal.to_s
end

.find_root_subjects(grouped, entity) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 108

def self.find_root_subjects(grouped, entity)
  # Find subjects that match the requested entity type
  grouped.select do |subject, triples|
    type_triple = triples.find { |t| t[:predicate] == RDF::RDFV.type }
    next false unless type_triple

    type_name = type_triple[:object].to_s.split('/').last
    type_name.downcase == entity.downcase ||
      type_name.tableize == entity.tableize ||
      type_name == entity
  end.keys
end

.graph_name ⇒ Object 



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# File 'lib/solis/query/run.rb', line 226

def self.graph_name
  Solis::Options.instance.get.key?(:graphs) ? Solis::Options.instance.get[:graphs].select { |s| s['type'].eql?(:main) }&.first['name'] : ''
end

.group_by_subject(results) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 43

def self.group_by_subject(results)
  results.each_with_object({}) do |solution, acc|
    subject = solution.s.to_s
    acc[subject] ||= []
    acc[subject] << { predicate: solution.p, object: solution.o }
  end
end

.resolve_value(value, objects_index, max_depth, visited, current_depth) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 165

def self.resolve_value(value, objects_index, max_depth, visited, current_depth)
  case value
  when Array
    value.map { |v| resolve_value(v, objects_index, max_depth, visited, current_depth) }
  when Hash
    if value.key?('@ref')
      # This is a reference - try to embed it
      ref_uri = value['@ref']
      referenced_obj = objects_index[ref_uri]

      if referenced_obj
        embed_references(referenced_obj, objects_index, max_depth, visited, current_depth + 1)
      else
        # External reference - return both IDs
        { '_id' => ref_uri, 'id' => ref_uri.split('/').last }
      end
    else
      # Regular hash - recurse
      value.transform_values { |v| resolve_value(v, objects_index, max_depth, visited, current_depth) }
    end
  else
    value
  end
end

.run(entity, query, options = {}) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 5

def self.run(entity, query, options = {})
  result = {}

  c = Solis::Store::Sparql::Client.new(Solis::Options.instance.get[:sparql_endpoint], graph_name: graph_name)
  r = c.query(query, options)

  if r.is_a?(SPARQL::Client)
    result = direct_transform_with_embedding(r, entity, options)
  else
    t = r.map(&:to_h)
    result = sanitize_result({'@graph' => t})
  end
  result
rescue StandardError => e
  puts e.message
  raise e
end

.sanitatize_data_in_result(data) ⇒ Object 



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# File 'lib/solis/query/run.rb', line 236

def self.sanitatize_data_in_result(data)
  data.map do |d|
    d.delete_if { |e| e =~ /^@/ }
    if d.is_a?(Hash)
      new_d = {}
      d.each do |k, v|
        if v.is_a?(Hash)
          if v.key?('@type')
            type = v['@type']
            if v.key?('@value')
              value = v['@value']
              case type
              when "http://www.w3.org/2001/XMLSchema#dateTime"
                value = DateTime.parse(value)
              when "http://www.w3.org/2001/XMLSchema#date"
                value = Date.parse(value)
              when "http://www.w3.org/2006/time#DateTimeInterval"
                value = ISO8601::TimeInterval.parse(value)
              when "http://www.w3.org/2001/XMLSchema#boolean"
                value = value == "true"
              end
              v = value
            end
            v = sanitize_result(v) if v.is_a?(Hash)
          end
          if v.is_a?(Hash)
            new_d[k] = v.class.method_defined?(:value) ? v.value : sanitize_result(v)
          else
            new_d[k] = v.class.method_defined?(:value) ? v.value : v
          end
        elsif v.is_a?(Array)
          new_d[k] = []
          v.each do |vt|
            if vt.is_a?(Hash)
              if vt.key?('@value')
                new_d[k] << vt['@value']
              else
                new_d[k] << (vt.is_a?(String) ? vt : sanitize_result(vt))
              end
            else
              new_d[k] << (vt.is_a?(String) ? vt : sanitize_result(vt))
            end
          end
          new_d[k].flatten!
        else
          new_d[k] = v.class.method_defined?(:value) ? v.value : v
        end
      end
      d = new_d
    end
    d
  end
rescue StandardError => e
  Solis::LOGGER.error(e.message)
  data
end

.sanitize_result(framed) ⇒ Object

Keep original methods for backward compatibility



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# File 'lib/solis/query/run.rb', line 231

def self.sanitize_result(framed)
  data = framed&.key?('@graph') ? framed['@graph'] : [framed]
  sanitatize_data_in_result(data)
end