module GraphQL::StaticValidation::DefinitionDependencies

# File lib/graphql/static_validation/definition_dependencies.rb, line 13
def initialize(*)
  super
  @defdep_node_paths = {}

  # { name => [node, ...] } pairs for fragments (although duplicate-named fragments are _invalid_, they are _possible_)
  @defdep_fragment_definitions = Hash.new{ |h, k| h[k] = [] }

  # This tracks dependencies from fragment to Node where it was used
  # { fragment_definition_name => [dependent_node, dependent_node]}
  @defdep_dependent_definitions = Hash.new { |h, k| h[k] = Set.new }

  # First-level usages of spreads within definitions
  # (When a key has an empty list as its value,
  #  we can resolve that key's dependents)
  # { definition_node => [node, node ...] }
  @defdep_immediate_dependencies = Hash.new { |h, k| h[k] = Set.new }

  # When we encounter a spread,
  # this node is the one who depends on it
  @defdep_current_parent = nil
end

# File lib/graphql/static_validation/definition_dependencies.rb, line 78
def dependency_map(&block)
  @dependency_map ||= resolve_dependencies(&block)
end

# File lib/graphql/static_validation/definition_dependencies.rb, line 35
def on_document(node, parent)
  node.definitions.each do |definition|
    if definition.is_a? GraphQL::Language::Nodes::FragmentDefinition
      @defdep_fragment_definitions[definition.name] << definition
    end
  end
  super
  @dependencies = dependency_map { |defn, spreads, frag|
    context.on_dependency_resolve_handlers.each { |h| h.call(defn, spreads, frag) }
  }
end

# File lib/graphql/static_validation/definition_dependencies.rb, line 54
def on_fragment_definition(node, parent)
  @defdep_node_paths[node] = NodeWithPath.new(node, context.path)
  @defdep_current_parent = node
  super
  @defdep_current_parent = nil
end

# File lib/graphql/static_validation/definition_dependencies.rb, line 61
def on_fragment_spread(node, parent)
  @defdep_node_paths[node] = NodeWithPath.new(node, context.path)

  # Track both sides of the dependency
  @defdep_dependent_definitions[node.name] << @defdep_current_parent
  @defdep_immediate_dependencies[@defdep_current_parent] << node
  super
end

# File lib/graphql/static_validation/definition_dependencies.rb, line 47
def on_operation_definition(node, prev_node)
  @defdep_node_paths[node.name] = NodeWithPath.new(node, context.path)
  @defdep_current_parent = node
  super
  @defdep_current_parent = nil
end