Module: Ruby2JS::Filter::Stimulus

Extended by:
SEXP
Includes:
SEXP
Defined in:
lib/ruby2js/filter/stimulus.rb

Constant Summary collapse

STIMULUS_IMPORT =
s(:import,
        [s(:pair, s(:sym, :as), s(:const, nil, :Stimulus)),
s(:pair, s(:sym, :from), s(:str, "@hotwired/stimulus"))],
s(:str, '*'))
STIMULUS_IMPORT_SKYPACK =
s(:import,
        [s(:pair, s(:sym, :as), s(:const, nil, :Stimulus)),
s(:pair, s(:sym, :from), s(:str, "https://cdn.skypack.dev/@hotwired/stimulus"))],
s(:str, '*'))

Instance Method Summary collapse

Methods included from SEXP

S, s

Instance Method Details

#initialize(*args) ⇒ Object



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# File 'lib/ruby2js/filter/stimulus.rb', line 20

def initialize(*args)
  super
  @stim_scope = []
  @stim_subclasses = []
end

#on_class(node) ⇒ Object



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# File 'lib/ruby2js/filter/stimulus.rb', line 34

def on_class(node)
  cname, inheritance, *body = node.children
  return super unless inheritance == s(:const, nil, :Stimulus) or
    inheritance == s(:const, s(:const, nil, :Stimulus), :Controller) or
    inheritance == s(:send, s(:const, nil, :Stimulus), :Controller) or
    @stim_subclasses.include? @namespace.resolve(inheritance)

  if inheritance == s(:const, nil, :Stimulus)
    node = node.updated(nil, [node.children.first,
      s(:const, s(:const, nil, :Stimulus), :Controller),
      *node.children[2..-1]])
  end

  @stim_subclasses << @stim_scope + @namespace.resolve(cname)

  @stim_targets = Set.new
  @stim_values = Set.new
  @stim_classes = Set.new
  stim_walk(node)

  if modules_enabled?
    prepend_list << (@options[:import_from_skypack] ?
      STIMULUS_IMPORT_SKYPACK : STIMULUS_IMPORT)
  end

  nodes = body
  if nodes.length == 1 and nodes.first&.type == :begin
    nodes = nodes.first.children.dup
  end

  unless @stim_classes.empty?
    classes = nodes.find_index {|child| 
      child.type == :send and child.children[0..1] == [s(:self), :classes=]
    }

    if classes == nil
      nodes.unshift s(:send, s(:self), :classes=, s(:array, *@stim_classes))
    elsif nodes[classes].children[2].type == :array
      @stim_classes.merge(nodes[classes].children[2].children)
      nodes[classes] = nodes[classes].updated(nil,
        [*nodes[classes].children[0..1], s(:array, *@stim_classes)])
    end
  end

  unless @stim_values.empty?
    values = nodes.find_index {|child| 
      child.type == :send and child.children[0..1] == [s(:self), :values=]
    }

    if values == nil
      nodes.unshift s(:send, s(:self), :values=, s(:hash,
      *@stim_values.map {|name| s(:pair, name, s(:const, nil, :String))}))
    elsif nodes[values].children[2].type == :hash
      stim_values = @stim_values.map {|name| 
        [s(:sym, name.children.first.to_sym), s(:const, nil, :String)]
      }.to_h.merge(
        nodes[values].children[2].children.map {|pair| pair.children}.to_h
      )

      nodes[values] = nodes[values].updated(nil,
        [*nodes[values].children[0..1], s(:hash,
        *stim_values.map{|name, value| s(:pair, name, value)})])
    end
  end

  unless @stim_targets.empty?
    targets = nodes.find_index {|child| 
      child.type == :send and child.children[0..1] == [s(:self), :targets=]
    }

    if targets == nil
      nodes.unshift s(:send, s(:self), :targets=, s(:array, *@stim_targets))
    elsif nodes[targets].children[2].type == :array
      @stim_targets.merge(nodes[targets].children[2].children)
      nodes[targets] = nodes[targets].updated(nil,
        [*nodes[targets].children[0..1], s(:array, *@stim_targets)])
    end
  end

  props = [:element, :application]

  props += @stim_targets.map do |name|
    name = name.children.first
    ["#{name}Target", "#{name}Targets", "has#{name[0].upcase}#{name[1..-1]}Target"]
  end

  props += @stim_values.map do |name|
    name = name.children.first
    ["#{name}Value", "has#{name[0].upcase}#{name[1..-1]}Value"]
  end

  props += @stim_classes.map do |name|
    name = name.children.first
    ["#{name}Class", "has#{name[0].upcase}#{name[1..-1]}Class"]
  end

  props = props.flatten.map {|prop| [prop.to_sym, s(:self)]}.to_h

  props[:initialize] = s(:autobind, s(:self))

  nodes.unshift s(:defineProps, props)

  nodes.pop unless nodes.last

  node.updated(nil, [*node.children[0..1], s(:begin, *process_all(nodes))])
end

#on_module(node) ⇒ Object



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# File 'lib/ruby2js/filter/stimulus.rb', line 26

def on_module(node)
  save_scope = @stim_scope
  @stim_scope += @namespace.resolve(node.children.first)
  super
ensure
  @stim_scope = save_scope
end

#stim_walk(node) ⇒ Object

analyze ivar usage



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# File 'lib/ruby2js/filter/stimulus.rb', line 142

def stim_walk(node)
  node.children.each do |child|
    next unless Parser::AST::Node === child
    stim_walk(child)

    if child.type == :send and child.children.length == 2 and
      [nil, s(:self), s(:send, nil, :this)].include? child.children[0]

      if child.children[1] =~ /^has([A-Z]\w*)(Target|Value|Class)$/
        name = s(:str, $1[0].downcase + $1[1..-1])
        @stim_targets.add name if $2 == 'Target'
        @stim_values.add name if $2 == 'Value'
        @stim_classes.add name if $2 == 'Class'
      elsif child.children[1] =~ /^(\w+)Targets?$/
        @stim_targets.add s(:str, $1)
      elsif child.children[1] =~ /^(\w+)Value=?$/
        @stim_values.add s(:str, $1)
      elsif child.children[1] =~ /^(\w+)Class$/
        @stim_classes.add s(:str, $1)
      end

    elsif child.type == :send and child.children.length == 3 and
      [s(:self), s(:send, nil, :this)].include? child.children[0]

      if child.children[1] =~ /^(\w+)Value=$/
        @stim_values.add s(:str, $1)
      end

    elsif child.type == :lvasgn
      if child.children[0] =~ /^(\w+)Value$/
        @stim_values.add s(:str, $1)
      end

    elsif child.type == :def
      if child.children[0] =~ /^(\w+)ValueChanged$/
        @stim_values.add s(:str, $1)
      end
    end

  end
end