Class: RBS::Prototype::Runtime

# File 'lib/rbs/prototype/runtime.rb', line 10

attr_reader :merge

# File 'lib/rbs/prototype/runtime.rb', line 11

attr_reader :owners_included

# File 'lib/rbs/prototype/runtime.rb', line 8

attr_reader :patterns

# File 'lib/rbs/prototype/runtime.rb', line 37

def builder
  @builder ||= DefinitionBuilder.new(env: env)
end

# File 'lib/rbs/prototype/runtime.rb', line 527

def const_name(const)
  @module_name_method ||= Module.instance_method(:name)
  @module_name_method.bind(const).call
end

# File 'lib/rbs/prototype/runtime.rb', line 45

def decls
  unless @decls
    @decls = []
    @modules = ObjectSpace.each_object(Module).to_a
    @modules.select {|mod| target?(mod) }.sort_by{|mod| const_name(mod) }.each do |mod|
      case mod
      when Class
        generate_class mod
      when Module
        generate_module mod
      end
    end
  end

  @decls
end

# File 'lib/rbs/prototype/runtime.rb', line 76

def each_included_module(type_name, mod)
  supers = Set[]

  mod.included_modules.each do |mix|
    supers.merge(mix.included_modules)
  end

  if mod.is_a?(Class) && mod.superclass
    mod.superclass.included_modules.each do |mix|
      supers << mix
      supers.merge(mix.included_modules)
    end
  end

  mod.included_modules.each do |mix|
    unless supers.include?(mix)
      unless const_name(mix)
        RBS.logger.warn("Skipping anonymous module #{mix} included in #{mod}")
      else
        module_name = module_full_name = to_type_name(const_name(mix), full_name: true)
        if module_full_name.namespace == type_name.namespace
          module_name = TypeName.new(name: module_full_name.name, namespace: Namespace.empty)
        end

        yield module_name, module_full_name, mix
      end
    end
  end
end

# File 'lib/rbs/prototype/runtime.rb', line 478

def ensure_outer_module_declarations(mod)
  *outer_module_names, _ = const_name(mod).split(/::/) #=> parent = [A, B], mod = C
  destination = @decls # Copy the entries in ivar @decls, not .dup

  outer_module_names&.each_with_index do |outer_module_name, i|
    current_name = outer_module_names[0, i + 1].join('::')
    outer_module = @modules.detect { |x| const_name(x) == current_name }
    outer_decl = destination.detect { |decl| decl.is_a?(outer_module.is_a?(Class) ? AST::Declarations::Class : AST::Declarations::Module) && decl.name.name == outer_module_name.to_sym }

    # Insert AST::Declarations if declarations are not added previously
    unless outer_decl
      if outer_module.is_a?(Class)
        outer_decl = AST::Declarations::Class.new(
          name: to_type_name(outer_module_name),
          type_params: [],
          super_class: generate_super_class(outer_module),
          members: [],
          annotations: [],
          location: nil,
          comment: nil
        )
      else
        outer_decl = AST::Declarations::Module.new(
          name: to_type_name(outer_module_name),
          type_params: [],
          self_types: [],
          members: [],
          annotations: [],
          location: nil,
          comment: nil
        )
      end

      destination << outer_decl
    end

    destination = outer_decl.members
  end

  # Return the array of declarations checked out at the end
  destination
end

# File 'lib/rbs/prototype/runtime.rb', line 374

def generate_class(mod)
  type_name = to_type_name(const_name(mod))
  outer_decls = ensure_outer_module_declarations(mod)

  # Check if a declaration exists for the actual module
  decl = outer_decls.detect { |decl| decl.is_a?(AST::Declarations::Class) && decl.name.name == only_name(mod).to_sym }
  unless decl
    decl = AST::Declarations::Class.new(
      name: to_type_name(only_name(mod)),
      type_params: [],
      super_class: generate_super_class(mod),
      members: [],
      annotations: [],
      location: nil,
      comment: nil
    )

    outer_decls << decl
  end

  each_included_module(type_name, mod) do |module_name, module_full_name, _|
    args = type_args(module_full_name)
    decl.members << AST::Members::Include.new(
      name: module_name,
      args: args,
      location: nil,
      comment: nil,
      annotations: []
    )
  end

  each_included_module(type_name, mod.singleton_class) do |module_name, module_full_name ,_|
    args = type_args(module_full_name)
    decl.members << AST::Members::Extend.new(
      name: module_name,
      args: args,
      location: nil,
      comment: nil,
      annotations: []
    )
  end

  generate_methods(mod, type_name, decl.members)

  generate_constants mod, decl.members
end

# File 'lib/rbs/prototype/runtime.rb', line 323

def generate_constants(mod, decls)
  mod.constants(false).sort.each do |name|
    begin
      value = mod.const_get(name)
    rescue StandardError, LoadError => e
      RBS.logger.warn("Skipping constant #{name} of #{mod} since #{e}")
      next
    end

    next if value.is_a?(Class) || value.is_a?(Module)
    unless value.class.name
      RBS.logger.warn("Skipping constant #{name} #{value} of #{mod} as an instance of anonymous class")
      next
    end

    type = case value
           when true, false
             Types::Bases::Bool.new(location: nil)
           when nil
             Types::Optional.new(
               type: Types::Bases::Any.new(location: nil),
               location: nil
             )
           else
             value_type_name = to_type_name(const_name(value.class))
             args = type_args(value_type_name)
             Types::ClassInstance.new(name: value_type_name, args: args, location: nil)
           end

    decls << AST::Declarations::Constant.new(
      name: to_type_name(name.to_s),
      type: type,
      location: nil,
      comment: nil
    )
  end
end

# File 'lib/rbs/prototype/runtime.rb', line 224

def generate_methods(mod, module_name, members)
  mod.singleton_methods.select {|name| target_method?(mod, singleton: name) }.sort.each do |name|
    method = mod.singleton_class.instance_method(name)

    if method.name == method.original_name
      merge_rbs(module_name, members, singleton: name) do
        RBS.logger.info "missing #{module_name}.#{name} #{method.source_location}"

        members << AST::Members::MethodDefinition.new(
          name: method.name,
          types: [method_type(method)],
          kind: :singleton,
          location: nil,
          comment: nil,
          annotations: [],
          overload: false
        )
      end
    else
      members << AST::Members::Alias.new(
        new_name: method.name,
        old_name: method.original_name,
        kind: :singleton,
        location: nil,
        comment: nil,
        annotations: [],
        )
    end
  end

  public_instance_methods = mod.public_instance_methods.select {|name| target_method?(mod, instance: name) }
  unless public_instance_methods.empty?
    members << AST::Members::Public.new(location: nil)

    public_instance_methods.sort.each do |name|
      method = mod.instance_method(name)

      if method.name == method.original_name
        merge_rbs(module_name, members, instance: name) do
          RBS.logger.info "missing #{module_name}##{name} #{method.source_location}"

          members << AST::Members::MethodDefinition.new(
            name: method.name,
            types: [method_type(method)],
            kind: :instance,
            location: nil,
            comment: nil,
            annotations: [],
            overload: false
          )
        end
      else
        members << AST::Members::Alias.new(
          new_name: method.name,
          old_name: method.original_name,
          kind: :instance,
          location: nil,
          comment: nil,
          annotations: [],
          )
      end
    end
  end

  private_instance_methods = mod.private_instance_methods.select {|name| target_method?(mod, instance: name) }
  unless private_instance_methods.empty?
    members << AST::Members::Private.new(location: nil)

    private_instance_methods.sort.each do |name|
      method = mod.instance_method(name)

      if method.name == method.original_name
        merge_rbs(module_name, members, instance: name) do
          RBS.logger.info "missing #{module_name}##{name} #{method.source_location}"

          members << AST::Members::MethodDefinition.new(
            name: method.name,
            types: [method_type(method)],
            kind: :instance,
            location: nil,
            comment: nil,
            annotations: [],
            overload: false
          )
        end
      else
        members << AST::Members::Alias.new(
          new_name: method.name,
          old_name: method.original_name,
          kind: :instance,
          location: nil,
          comment: nil,
          annotations: [],
          )
      end
    end
  end
end

# File 'lib/rbs/prototype/runtime.rb', line 421

def generate_module(mod)
  name = const_name(mod)

  unless name
    RBS.logger.warn("Skipping anonymous module #{mod}")
    return
  end

  type_name = to_type_name(name)
  outer_decls = ensure_outer_module_declarations(mod)

  # Check if a declaration exists for the actual class
  decl = outer_decls.detect { |decl| decl.is_a?(AST::Declarations::Module) && decl.name.name == only_name(mod).to_sym }
  unless decl
    decl = AST::Declarations::Module.new(
      name: to_type_name(only_name(mod)),
      type_params: [],
      self_types: [],
      members: [],
      annotations: [],
      location: nil,
      comment: nil
    )

    outer_decls << decl
  end

  each_included_module(type_name, mod) do |module_name, module_full_name, _|
    args = type_args(module_full_name)
    decl.members << AST::Members::Include.new(
      name: module_name,
      args: args,
      location: nil,
      comment: nil,
      annotations: []
    )
  end

  each_included_module(type_name, mod.singleton_class) do |module_name, module_full_name, _|
    args = type_args(module_full_name)
    decl.members << AST::Members::Extend.new(
      name: module_name,
      args: args,
      location: nil,
      comment: nil,
      annotations: []
    )
  end

  generate_methods(mod, type_name, decl.members)

  generate_constants mod, decl.members
end

# File 'lib/rbs/prototype/runtime.rb', line 361

def generate_super_class(mod)
  if mod.superclass.nil? || mod.superclass == ::Object
    nil
  elsif const_name(mod.superclass).nil?
    RBS.logger.warn("Skipping anonymous superclass #{mod.superclass} of #{mod}")
    nil
  else
    super_name = to_type_name(const_name(mod.superclass), full_name: true)
    super_args = type_args(super_name)
    AST::Declarations::Class::Super.new(name: super_name, args: super_args, location: nil)
  end
end

# File 'lib/rbs/prototype/runtime.rb', line 173

def merge_rbs(module_name, members, instance: nil, singleton: nil)
  if merge
    if env.class_decls[module_name.absolute!]
      case
      when instance
        method = builder.build_instance(module_name.absolute!).methods[instance]
        method_name = instance
        kind = :instance
      when singleton
        method = builder.build_singleton(module_name.absolute!).methods[singleton]
        method_name = singleton
        kind = :singleton
      end

      if method
        members << AST::Members::MethodDefinition.new(
          name: method_name,
          types: method.method_types.map {|type|
            type.update.tap do |ty|
              def ty.to_s
                location.source
              end
            end
          },
          kind: kind,
          location: nil,
          comment: method.comments[0],
          annotations: method.annotations,
          overload: false
        )
        return
      end
    end

    yield
  else
    yield
  end
end

# File 'lib/rbs/prototype/runtime.rb', line 106

def method_type(method)
  untyped = Types::Bases::Any.new(location: nil)

  required_positionals = []
  optional_positionals = []
  rest = nil
  trailing_positionals = []
  required_keywords = {}
  optional_keywords = {}
  rest_keywords = nil

  requireds = required_positionals

  block = nil

  method.parameters.each do |kind, name|
    case kind
    when :req
      requireds << Types::Function::Param.new(name: name, type: untyped)
    when :opt
      requireds = trailing_positionals
      optional_positionals << Types::Function::Param.new(name: name, type: untyped)
    when :rest
      requireds = trailing_positionals
      name = nil if name == :* # For `def f(...) end` syntax
      rest = Types::Function::Param.new(name: name, type: untyped)
    when :keyreq
      required_keywords[name] = Types::Function::Param.new(name: nil, type: untyped)
    when :key
      optional_keywords[name] = Types::Function::Param.new(name: nil, type: untyped)
    when :keyrest
      rest_keywords = Types::Function::Param.new(name: nil, type: untyped)
    when :block
      block = Types::Block.new(
        type: Types::Function.empty(untyped).update(rest_positionals: Types::Function::Param.new(name: nil, type: untyped)),
        required: true,
        self_type: nil
      )
    end
  end

  block ||= block_from_ast_of(method)

  return_type = if method.name == :initialize
                  Types::Bases::Void.new(location: nil)
                else
                  untyped
                end
  method_type = Types::Function.new(
    required_positionals: required_positionals,
    optional_positionals: optional_positionals,
    rest_positionals: rest,
    trailing_positionals: trailing_positionals,
    required_keywords: required_keywords,
    optional_keywords: optional_keywords,
    rest_keywords: rest_keywords,
    return_type: return_type,
  )

  MethodType.new(
    location: nil,
    type_params: [],
    type: method_type,
    block: block
  )
end

# File 'lib/rbs/prototype/runtime.rb', line 522

def only_name(mod)
  # No nil check because this method is invoked after checking if the module exists
  const_name(mod).split(/::/).last # (A::B::C) => C
end

# File 'lib/rbs/prototype/runtime.rb', line 41

def parse(file)
  require file
end

# File 'lib/rbs/prototype/runtime.rb', line 24

def target?(const)
  name = const_name(const)
  return false unless name

  patterns.any? do |pattern|
    if pattern.end_with?("*")
      (name || "").start_with?(pattern.chop)
    else
      name == pattern
    end
  end
end

# File 'lib/rbs/prototype/runtime.rb', line 213

def target_method?(mod, instance: nil, singleton: nil)
  case
  when instance
    method = mod.instance_method(instance)
    method.owner == mod || owners_included.any? {|m| method.owner == m }
  when singleton
    method = mod.singleton_class.instance_method(singleton)
    method.owner == mod.singleton_class || owners_included.any? {|m| method.owner == m.singleton_class }
  end
end

# File 'lib/rbs/prototype/runtime.rb', line 62

def to_type_name(name, full_name: false)
  *prefix, last = name.split(/::/)

  if full_name
    if prefix.empty?
      TypeName.new(name: last.to_sym, namespace: Namespace.empty)
    else
      TypeName.new(name: last.to_sym, namespace: Namespace.parse(prefix.join("::")))
    end
  else
    TypeName.new(name: last.to_sym, namespace: Namespace.empty)
  end
end

# File 'lib/rbs/prototype/runtime.rb', line 532

def type_args(type_name)
  if class_decl = env.class_decls[type_name.absolute!]
    class_decl.type_params.size.times.map { :untyped }
  else
    []
  end
end