Class: Graml::FlattenYaml

Inherits:
Object
  • Object
show all
Defined in:
lib/graml/flatten_yaml.rb

Defined Under Namespace

Classes: Item

Instance Method Summary collapse

Constructor Details

#initialize(pathname) ⇒ FlattenYaml

Returns a new instance of FlattenYaml.



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# File 'lib/graml/flatten_yaml.rb', line 8

def initialize(pathname)
  @pathname = pathname
end

Instance Method Details

#entries ⇒ Object 



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# File 'lib/graml/flatten_yaml.rb', line 12

def entries
  flatten
end

#flatten ⇒ Object 



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# File 'lib/graml/flatten_yaml.rb', line 16

def flatten
  with_line_numbers.compact.flat_map do |line|
    flatten_hash(line) if line.is_a?(Hash)
  end.compact
end

#flatten_hash(hash, prefix = nil) ⇒ Object 



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# File 'lib/graml/flatten_yaml.rb', line 22

def flatten_hash(hash, prefix = nil)
  hash.flat_map do |key, value|
    if value.is_a?(Graml::Data)
      key = [prefix, key].compact.join(".")
      Item.new(key: key, value: truncate(value.value.to_s), line: value.line)
    elsif value.is_a?(Hash)
      flatten_hash(value, [prefix, key].compact.join("."))
    end
  end
rescue StandardError => e
  warn "Error parsing #{@pathname}, #{e.message}"
end

#truncate(string, max = 50) ⇒ Object 



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# File 'lib/graml/flatten_yaml.rb', line 50

def truncate(string, max = 50)
  string.length > max ? "#{string[0...max]}..." : string
end

#with_line_numbers ⇒ Object 



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# File 'lib/graml/flatten_yaml.rb', line 35

def with_line_numbers
  parser = Psych::Parser.new(LineNumberHandler.new)
  parser.handler.parser = parser
  parser.parse(File.read(@pathname))
  parser.handler.root.to_ruby
rescue Psych::SyntaxError
  warn "Invalid YAML #{@pathname}"

  []
rescue StandardError => e
  warn "Error parsing #{@pathname}, #{e.message}"

  []
end