Module: Odin::Transform::Verbs::ObjectVerbs

Defined in:
lib/odin/transform/verbs/object_verbs.rb

Class Method Summary collapse

Class Method Details

.dig_path(value, path) ⇒ Object

Navigate a dotted key path; returns the DynValue or nil if absent.



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# File 'lib/odin/transform/verbs/object_verbs.rb', line 24

def dig_path(value, path)
  obj = extract_obj(value)
  return nil if obj.nil?
  current = obj
  path.split(".").each do |seg|
    return nil unless current.is_a?(Hash) && current.key?(seg)
    nxt = current[seg]
    current = nxt&.object? ? nxt.value : nxt
  end
  current.is_a?(Hash) ? Types::DynValue.of_object(current) : current
end

.extract_obj(v) ⇒ Object 



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# File 'lib/odin/transform/verbs/object_verbs.rb', line 9

def extract_obj(v)
  return nil if v.nil? || v.null?
  return v.value if v.object?
  if v.string?
    begin
      parsed = Types::DynValue.extract_object(v.value)
      return parsed.value
    rescue
      return nil
    end
  end
  nil
end

.register(registry) ⇒ Object 



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# File 'lib/odin/transform/verbs/object_verbs.rb', line 36

def register(registry)
  dv = Types::DynValue

  registry["keys"] = ->(args, _ctx) {
    obj = ObjectVerbs.extract_obj(args[0])
    return dv.of_null if obj.nil?
    dv.of_array(obj.keys.map { |k| dv.of_string(k) })
  }

  registry["values"] = ->(args, _ctx) {
    obj = ObjectVerbs.extract_obj(args[0])
    return dv.of_null if obj.nil?
    dv.of_array(obj.values)
  }

  registry["entries"] = ->(args, _ctx) {
    obj = ObjectVerbs.extract_obj(args[0])
    return dv.of_null if obj.nil?
    result = obj.map { |k, v| dv.of_array([dv.of_string(k), v]) }
    dv.of_array(result)
  }

  registry["has"] = ->(args, _ctx) {
    found = ObjectVerbs.dig_path(args[0], args[1]&.to_string || "")
    dv.of_bool(!found.nil?)
  }

  registry["get"] = ->(args, _ctx) {
    default_val = args[2] || dv.of_null
    found = ObjectVerbs.dig_path(args[0], args[1]&.to_string || "")
    found.nil? ? default_val : found
  }

  registry["merge"] = ->(args, _ctx) {
    result = {}
    args.each do |a|
      obj = ObjectVerbs.extract_obj(a)
      result.merge!(obj) if obj
    end
    result.empty? ? dv.of_null : dv.of_object(result)
  }

  registry["jsonPath"] = ->(args, _ctx) {
    root = args[0]
    path = args[1]&.to_string || ""
    return dv.of_null if root.nil? || root.null? || path.empty?

    # Simple JSONPath: split on '.' and navigate
    parts = path.sub(/^\$\.?/, "").split(".")
    current = root
    parts.each do |part|
      break if current.nil? || current.null?
      # Handle array index like items[0]
      if part =~ /^(.+)\[(\d+)\]$/
        field = $1
        idx = $2.to_i
        current = current.object? ? current.get(field) : nil
        current = current&.array? ? (current.value[idx] || dv.of_null) : dv.of_null
      elsif current.object?
        current = current.get(part)
      elsif current.array?
        idx = part.to_i
        current = current.value[idx] || dv.of_null
      else
        current = nil
      end
    end
    current || dv.of_null
  }

  registry["extract"] = ->(args, _ctx) {
    return dv.of_null if args.length < 2

    s = args[0]&.to_string || ""
    pattern = args[1]&.to_string || ""
    group = args.length >= 3 ? (args[2]&.to_number || 0).floor : 0

    begin
      match = Regexp.new(pattern).match(s)
    rescue RegexpError
      return dv.of_null
    end
    return dv.of_null if match.nil?
    return dv.of_null if group.negative? || group >= match.size

    captured = match[group]
    captured.nil? ? dv.of_null : dv.of_string(captured)
  }
end