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# File 'lib/graphql/language/generation.rb', line 6
def generate(node, indent: "")
case node
when Nodes::Document
node.definitions.map { |d| generate(d) }.join("\n\n")
when Nodes::Argument
"#{node.name}: #{generate(node.value)}"
when Nodes::Directive
"@#{node.name}(#{node.arguments.map { |a| generate(a) }.join(", ")})"
when Nodes::Enum
"#{node.name}"
when Nodes::Field
out = "#{indent}"
out << "#{node.alias}: " if node.alias
out << "#{node.name}"
out << "(#{node.arguments.map { |a| generate(a) }.join(", ")})" if node.arguments.any?
out << generate_directives(node.directives)
out << generate_selections(node.selections, indent: indent)
out
when Nodes::FragmentDefinition
out = "#{indent}fragment #{node.name}"
out << " on #{node.type}" if node.type
out << generate_directives(node.directives)
out << generate_selections(node.selections, indent: indent)
out
when Nodes::FragmentSpread
out = "#{indent}... #{node.name}"
out << generate_directives(node.directives)
out
when Nodes::InlineFragment
out = "#{indent}..."
out << " on #{node.type}" if node.type
out << generate_directives(node.directives)
out << generate_selections(node.selections, indent: indent)
out
when Nodes::InputObject
generate(node.to_h)
when Nodes::ListType
"[#{generate(node.of_type)}]"
when Nodes::NonNullType
"#{generate(node.of_type)}!"
when Nodes::OperationDefinition
out = "#{indent}#{node.operation_type}"
out << " #{node.name}" if node.name
out << "(#{node.variables.map { |v| generate(v) }.join(", ")})" if node.variables.any?
out << generate_directives(node.directives)
out << generate_selections(node.selections, indent: indent)
out
when Nodes::TypeName
"#{node.name}"
when Nodes::VariableDefinition
out = "$#{node.name}: #{generate(node.type)}"
out << " = #{generate(node.default_value)}" unless node.default_value.nil?
out
when Nodes::VariableIdentifier
"$#{node.name}"
when Nodes::SchemaDefinition
out = "schema {\n"
out << " query: #{node.query}\n" if node.query
out << " mutation: #{node.mutation}\n" if node.mutation
out << " subscription: #{node.subscription}\n" if node.subscription
out << "}"
when Nodes::ScalarTypeDefinition
"scalar #{node.name}"
when Nodes::ObjectTypeDefinition
out = "type #{node.name}"
out << " implements " << node.interfaces.join(", ") unless node.interfaces.empty?
out << generate_field_definitions(node.fields)
when Nodes::InputValueDefinition
out = "#{node.name}: #{generate(node.type)}"
out << " = #{generate(node.default_value)}" unless node.default_value.nil?
out
when Nodes::FieldDefinition
out = node.name.dup
unless node.arguments.empty?
out << "(" << node.arguments.map{ |arg| generate(arg) }.join(", ") << ")"
end
out << ": #{generate(node.type)}"
when Nodes::InterfaceTypeDefinition
out = "interface #{node.name}"
out << generate_field_definitions(node.fields)
when Nodes::UnionTypeDefinition
"union #{node.name} = " + node.types.join(" | ")
when Nodes::EnumTypeDefinition
out = "enum #{node.name} {\n"
node.values.each do |value|
out << " #{value}\n"
end
out << "}"
when Nodes::InputObjectTypeDefinition
out = "input #{node.name} {\n"
node.fields.each do |field|
out << " #{generate(field)}\n"
end
out << "}"
when Nodes::AbstractNode
node.to_query_string(indent: indent)
when FalseClass, Float, Integer, NilClass, String, TrueClass
JSON.generate(node, quirks_mode: true)
when Array
"[#{node.map { |v| generate(v) }.join(", ")}]"
when Hash
"{ #{node.map { |k, v| "#{k}: #{generate(v)}" }.join(", ")} }"
else
raise TypeError
end
end
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