Class: JSON::Repairer

Inherits:
Object
  • Object
show all
Includes:
JSON::Repair::StringUtils
Defined in:
lib/json/repairer.rb

Constant Summary collapse

CONTROL_CHARACTERS = 
{
  "\b" => '\b',
  "\f" => '\f',
  "\n" => '\n',
  "\r" => '\r',
  "\t" => '\t'
}.freeze
ESCAPE_CHARACTERS = 
{
  '"' => '"',
  '\\' => '\\',
  '/' => '/',
  'b' => "\b",
  'f' => "\f",
  'n' => "\n",
  'r' => "\r",
  't' => "\t"
}.freeze

Constants included from JSON::Repair::StringUtils

JSON::Repair::StringUtils::ACUTE_ACCENT, JSON::Repair::StringUtils::ASTERISK, JSON::Repair::StringUtils::BACKSLASH, JSON::Repair::StringUtils::BACKSPACE, JSON::Repair::StringUtils::CLOSE_PARENTHESIS, JSON::Repair::StringUtils::CLOSING_BRACE, JSON::Repair::StringUtils::CLOSING_BRACKET, JSON::Repair::StringUtils::COLON, JSON::Repair::StringUtils::COMMA, JSON::Repair::StringUtils::DOT, JSON::Repair::StringUtils::DOUBLE_QUOTE, JSON::Repair::StringUtils::DOUBLE_QUOTE_LEFT, JSON::Repair::StringUtils::DOUBLE_QUOTE_RIGHT, JSON::Repair::StringUtils::EN_QUAD, JSON::Repair::StringUtils::FORM_FEED, JSON::Repair::StringUtils::GRAVE_ACCENT, JSON::Repair::StringUtils::HAIR_SPACE, JSON::Repair::StringUtils::IDEOGRAPHIC_SPACE, JSON::Repair::StringUtils::LOWERCASE_A, JSON::Repair::StringUtils::LOWERCASE_E, JSON::Repair::StringUtils::LOWERCASE_F, JSON::Repair::StringUtils::MEDIUM_MATHEMATICAL_SPACE, JSON::Repair::StringUtils::MINUS, JSON::Repair::StringUtils::NARROW_NO_BREAK_SPACE, JSON::Repair::StringUtils::NEWLINE, JSON::Repair::StringUtils::NINE, JSON::Repair::StringUtils::NON_BREAKING_SPACE, JSON::Repair::StringUtils::OPENING_BRACE, JSON::Repair::StringUtils::OPENING_BRACKET, JSON::Repair::StringUtils::OPEN_PARENTHESIS, JSON::Repair::StringUtils::PLUS, JSON::Repair::StringUtils::QUOTE, JSON::Repair::StringUtils::QUOTE_LEFT, JSON::Repair::StringUtils::QUOTE_RIGHT, JSON::Repair::StringUtils::REGEX_DELIMITER, JSON::Repair::StringUtils::REGEX_START_OF_VALUE, JSON::Repair::StringUtils::RETURN, JSON::Repair::StringUtils::SEMICOLON, JSON::Repair::StringUtils::SLASH, JSON::Repair::StringUtils::SPACE, JSON::Repair::StringUtils::TAB, JSON::Repair::StringUtils::UPPERCASE_A, JSON::Repair::StringUtils::UPPERCASE_E, JSON::Repair::StringUtils::UPPERCASE_F, JSON::Repair::StringUtils::ZERO

Instance Method Summary collapse

Methods included from JSON::Repair::StringUtils

#control_character?, #delimiter?, #delimiter_except_slash?, #digit?, #double_quote?, #double_quote_like?, #ends_with_comma_or_newline?, #function_name?, #hex?, #insert_before_last_whitespace, #parse_keyword, #parse_keywords, #quote?, #remove_at_index, #single_quote?, #single_quote_like?, #special_whitespace?, #start_of_value?, #strip_last_occurrence, #valid_string_character?, #whitespace?

Constructor Details

#initialize(json) ⇒ Repairer

Returns a new instance of Repairer.



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# File 'lib/json/repairer.rb', line 28

def initialize(json)
  @json = json
  @index = 0
  @output = ''
end

Instance Method Details

#repair ⇒ Object 



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# File 'lib/json/repairer.rb', line 34

def repair
  processed = parse_value

  throw_unexpected_end unless processed

  processed_comma = parse_character(COMMA)
  parse_whitespace_and_skip_comments if processed_comma

  if start_of_value?(@json[@index]) && ends_with_comma_or_newline?(@output)
    # start of a new value after end of the root level object: looks like
    # newline delimited JSON -> turn into a root level array
    unless processed_comma
      # repair missing comma
      @output = insert_before_last_whitespace(@output, ',')
    end

    parse_newline_delimited_json
  elsif processed_comma
    # repair: remove trailing comma
    @output = strip_last_occurrence(@output, ',')
  end

  # repair redundant end quotes
  while @json[@index] == CLOSING_BRACE || @json[@index] == CLOSING_BRACKET
    @index += 1
    parse_whitespace_and_skip_comments
  end

  if @index >= @json.length
    # reached the end of the document properly
    return @output
  end

  throw_unexpected_character
end