Class: Rng::RncParser

Inherits:
Parslet::Parser
  • Object
show all
Defined in:
lib/rng/rnc_parser.rb

Class Method Summary collapse

Class Method Details

.convert_to_rng(tree) ⇒ Object 



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# File 'lib/rng/rnc_parser.rb', line 109

def self.convert_to_rng(tree)
  builder = Nokogiri::XML::Builder.new(encoding: "UTF-8") do |xml|
    if tree[:root].key?(:start)
      # This is a grammar with named patterns
      xml.grammar(xmlns: "http://relaxng.org/ns/structure/1.0") do
        # Add datatype library if present
        xml.datatypeLibrary tree[:datatype_library][:uri][:string].to_s if tree[:datatype_library]

        # Process start pattern
        xml.start do
          process_content_item(xml, tree[:root][:start])
        end

        # Process named patterns
        tree[:definitions]&.each do |def_item|
          next unless def_item.key?(:name)

          xml.define(name: def_item[:name][:identifier].to_s) do
            process_content_item(xml, def_item[:pattern])
          end
        end
      end
    else
      # This is a simple element pattern
      process_content_item(xml, tree[:root])
    end
  end

  builder.to_xml
end

.parse(input) ⇒ Object 



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# File 'lib/rng/rnc_parser.rb', line 97

def self.parse(input)
  parser = new
  tree = parser.parse(input.strip)
  convert_to_rng(tree)
end

.process_content_item(xml, item) ⇒ Object 



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# File 'lib/rng/rnc_parser.rb', line 140

def self.process_content_item(xml, item)
  if item.key?(:name)
    # Element definition
    attrs = {}
    attrs[:name] = item[:name][:local_name][:identifier].to_s

    attrs[:ns] = item[:name][:prefix][:identifier].to_s if item[:name][:prefix]

    xml.element(attrs) do
      if item[:content]
        item[:content][:items].each do |content_item|
          process_content_item(xml, content_item)
        end
      end
    end

    # Handle occurrence
    if item[:occurrence]
      case item[:occurrence].to_s
      when "*"
        xml.parent.name = "zeroOrMore"
      when "+"
        xml.parent.name = "oneOrMore"
      when "?"
        xml.parent.name = "optional"
      end
    end
  elsif item.key?(:attr_name)
    # Attribute definition
    attrs = {}
    attrs[:name] = item[:attr_name][:local_name][:identifier].to_s

    attrs[:ns] = item[:attr_name][:prefix][:identifier].to_s if item[:attr_name][:prefix]

    xml.attribute(attrs) do
      if item[:type] == "text"
        xml.text
      elsif item[:type].key?(:prefix)
        xml.data(type: item[:type][:type][:identifier].to_s,
                 datatypeLibrary: "http://www.w3.org/2001/XMLSchema-datatypes")
      end
    end
  elsif item.key?(:text)
    xml.text
  elsif item.key?(:empty)
    xml.empty
  elsif item.key?(:group)
    xml.group do
      item[:group][:items].each do |group_item|
        process_content_item(xml, group_item)
      end
    end

    # Handle occurrence
    if item[:occurrence]
      case item[:occurrence].to_s
      when "*"
        xml.parent.name = "zeroOrMore"
      when "+"
        xml.parent.name = "oneOrMore"
      when "?"
        xml.parent.name = "optional"
      end
    end
  elsif item.key?(:first) && item.key?(:rest)
    # Choice definition
    xml.choice do
      process_content_item(xml, item[:first])
      item[:rest].each do |choice_item|
        process_content_item(xml, choice_item[:second])
      end
    end
  elsif item.key?(:ref)
    # Reference to a named pattern
    xml.ref(name: item[:ref][:identifier].to_s)
  end
end

.to_rnc(schema) ⇒ Object 



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# File 'lib/rng/rnc_parser.rb', line 103

def self.to_rnc(schema)
  # Convert RNG schema to RNC
  builder = RncBuilder.new
  builder.build(schema)
end