Class: RubyLens::ArtModelBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/rubylens/art_model_builder.rb

Constant Summary collapse

SIGNAL_FIELDS = 
%w[ancestorDepth definitionSites reopenings descendants references members].freeze

Instance Method Summary collapse

Constructor Details

#initialize(seed: 0x51A7_E11A) ⇒ ArtModelBuilder

Returns a new instance of ArtModelBuilder.



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# File 'lib/rubylens/art_model_builder.rb', line 11

def initialize(seed: 0x51A7_E11A)
  @seed = seed
end

Instance Method Details

#build(snapshot) ⇒ Object 



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# File 'lib/rubylens/art_model_builder.rb', line 15

def build(snapshot)
  random = Random.new(@seed)
  morphology = MorphologyClassifier.new(snapshot).call
  namespace_order = (0...snapshot.fetch("namespaces").length).to_a.shuffle(random: random)
  namespace_index = Array.new(namespace_order.length)
  namespace_order.each_with_index { |old_index, new_index| namespace_index[old_index] = new_index }
  constant_reference_rows = valid_constant_reference_rows(snapshot)
  namespaces = namespace_order.map do |index|
    row = snapshot.fetch("namespaces").fetch(index)
    [random.rand(0..0xffff_ffff), *row]
  end
  namespace_names = namespace_order.map { |index| snapshot.fetch("namespace_names").fetch(index) }
  package_order = (0...snapshot.fetch("packages").length).to_a.shuffle(random: random)
  package_index = package_order.each_with_index.to_h
  dependency_systems, dependency_system_index = build_dependency_systems(snapshot, package_index)
  package_morphologies = []
  packages = package_order.map do |old_index|
    package = snapshot.fetch("packages").fetch(old_index)
    package_seed = random.rand(0..0xffff_ffff)
    package_morphology = MorphologyClassifier.new(package:, phase_seed: package_seed).call
    package_morphologies << [package_morphology.fetch("family"), *package_morphology.fetch("knobs")]
    [
      package_seed,
      package.fetch("role"),
      package.fetch("location"),
      package.fetch("declarations").length,
      *package.fetch("ruby_counts"),
      dependency_system_index.fetch(old_index, -1),
    ]
  end
  package_names = package_order.map { |old_index| snapshot.fetch("packages").fetch(old_index).fetch("name") }
  dependency_offsets = []
  dependency_count = 0
  snapshot.fetch("packages").each do |package|
    dependency_offsets << dependency_count
    dependency_count += package.fetch("declarations").length
  end
  dependency_target_rows = {}.compare_by_identity
  constant_reference_rows.each do |_referring_index, referenced_index|
    dependency_ordinal = referenced_index - namespace_order.length
    next if dependency_ordinal.negative? || dependency_ordinal >= dependency_count

    next_package_index = dependency_offsets.bsearch_index { |offset| offset > dependency_ordinal }
    old_package_index = (next_package_index || dependency_offsets.length) - 1
    package = snapshot.fetch("packages").fetch(old_package_index)
    local_index = dependency_ordinal - dependency_offsets.fetch(old_package_index)
    dependency_target_rows[package.fetch("declarations").fetch(local_index)] = dependency_ordinal
  end
  dependencies = []
  dependency_index = {}
  package_order.each do |old_index|
    package = snapshot.fetch("packages").fetch(old_index)
    declarations = package.fetch("declarations").sort.shuffle(random: random)
    declarations.each do |declaration|
      original_ordinal = dependency_target_rows[declaration]
      dependency_index[original_ordinal] = dependencies.length if original_ordinal
      dependencies << [
        random.rand(0..0xffff_ffff),
        package_index.fetch(old_index),
        *declaration.drop(1),
      ]
    end
  end
  constant_reference_links = build_constant_reference_links(
    constant_reference_rows,
    namespace_index,
    dependency_index,
  )
  {
    "schema" => "rubylens.art.v13",
    "projectName" => snapshot.fetch("project_name"),
    "morphology" => [morphology.fetch("family"), *morphology.fetch("knobs")],
    "totals" => {
      "namespaces" => namespaces.length,
      "packages" => packages.length,
      "dependencyStars" => dependencies.length,
    },
    "domains" => signal_domains(namespaces, snapshot.fetch("dependency_signal_maxima")),
    "categoryStats" => snapshot.fetch("category_stats"),
    "namespaceNames" => namespace_names,
    "namespaces" => namespaces,
    "constantReferenceLinks" => constant_reference_links,
    "packageNames" => package_names,
    "packages" => packages,
    "packageMorphologies" => package_morphologies,
    "dependencySystems" => dependency_systems,
    "dependencyStars" => dependencies,
    "dependencyWarnings" => snapshot.fetch("dependency_warnings", []).filter_map do |warning|
      name = warning.fetch("name")
      reason = warning.fetch("reason")
      next unless name.is_a?(String) && DependencyWarning::NAME_PATTERN.match?(name)
      next unless reason.is_a?(String) && DependencyWarning::ALLOWED_REASONS.include?(reason)

      { "name" => name, "reason" => reason }
    end,
    "warningCounts" => snapshot.fetch("warning_counts"),
  }
end