Module: Edoxen::SchemaValidator::LineMap

Defined in:
lib/edoxen/schema_validator.rb

Overview

Builds a => line_no map for a YAML source. The path is the JSON-Schema-style pointer: "/metadata", "/resolutions/0/title", etc. This is a tag-class is allocated freely — no instance_variable_set ever crosses another object's boundary.

Class Method Summary collapse

Class Method Details

.build(content) ⇒ Hash{String => Integer}

Returns:

  • (Hash{String => Integer}) 


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# File 'lib/edoxen/schema_validator.rb', line 136

def build(content)
  map = {}
  stack = []
  array_counter = Hash.new(-1)
  array_path_for = {}

  content.each_line.with_index(1) do |raw, line_no|
    line = raw.chomp
    stripped = line.strip
    next if stripped.empty? || stripped.start_with?("#") || stripped == "---"

    indent = line.index(/\S/) || 0
    level = indent / 2
    stack = stack.first(level)

    if stripped.start_with?("- ")
      parent = stack.empty? ? "" : "/#{stack.join("/")}"
      parent_key = parent.empty? ? parent : parent.dup
      array_counter[parent_key] = -1 unless array_counter.key?(parent_key)
      array_counter[parent_key] += 1
      array_index = array_counter[parent_key]
      array_path = "#{parent}/#{array_index}"
      map[array_path] = line_no

      remainder = stripped[2..].to_s.strip
      if remainder.match(/\A(.+?):(\s|$)/)
        key = Regexp.last_match(1).strip.gsub(/["']/, "")
        map["#{array_path}/#{key}"] = line_no
        stack = stack.first(level) + [array_index.to_s, key]
      else
        stack = stack.first(level) + [array_index.to_s]
      end
    elsif (md = stripped.match(/\A(.+?):(\s|$)/))
      key = md[1].strip.gsub(/["']/, "")
      stack = stack.first(level) + [key]
      full = "/#{stack.join("/")}"
      map[full] = line_no
      array_counter.delete_if { |p, _| p.start_with?(full) }
    end
  end
  map
end

.locate(pointer, line_map) ⇒ Array(Integer, Integer)

Returns [line, column] for the given JSON-Schema data pointer. Picks the longest prefix in the line map — pure longest-match, no knowledge of specific path shapes.

Returns:

  • (Array(Integer, Integer)) —

    [line, column] for the given JSON-Schema data pointer. Picks the longest prefix in the line map — pure longest-match, no knowledge of specific path shapes.



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# File 'lib/edoxen/schema_validator.rb', line 182

def locate(pointer, line_map)
  pointer = pointer.to_s
  return [1, 1] if pointer.empty?

  match_key = line_map.keys
                      .select { |path| pointer.start_with?(path) || path.start_with?(pointer) }
                      .max_by(&:length)

  match_key ? [line_map[match_key], 1] : [1, 1]
end