extractQuotedContent function

QuoteExtraction extractQuotedContent(String command, { bool isJq = false, })

Extract quoted content from a command string. Returns strings with different levels of quote stripping.

Implementation

QuoteExtraction extractQuotedContent(String command, {bool isJq = false}) {
  final withDoubleQuotes = StringBuffer();
  final fullyUnquoted = StringBuffer();
  final unquotedKeepQuoteChars = StringBuffer();
  var inSingleQuote = false;
  var inDoubleQuote = false;
  var escaped = false;

  for (var i = 0; i < command.length; i++) {
    final char = command[i];

    if (escaped) {
      escaped = false;
      if (!inSingleQuote) withDoubleQuotes.write(char);
      if (!inSingleQuote && !inDoubleQuote) fullyUnquoted.write(char);
      if (!inSingleQuote && !inDoubleQuote) {
        unquotedKeepQuoteChars.write(char);
      }
      continue;
    }

    if (char == r'\' && !inSingleQuote) {
      escaped = true;
      if (!inSingleQuote) withDoubleQuotes.write(char);
      if (!inSingleQuote && !inDoubleQuote) fullyUnquoted.write(char);
      if (!inSingleQuote && !inDoubleQuote) {
        unquotedKeepQuoteChars.write(char);
      }
      continue;
    }

    if (char == "'" && !inDoubleQuote) {
      inSingleQuote = !inSingleQuote;
      unquotedKeepQuoteChars.write(char);
      continue;
    }

    if (char == '"' && !inSingleQuote) {
      inDoubleQuote = !inDoubleQuote;
      unquotedKeepQuoteChars.write(char);
      if (!isJq) continue;
    }

    if (!inSingleQuote) withDoubleQuotes.write(char);
    if (!inSingleQuote && !inDoubleQuote) fullyUnquoted.write(char);
    if (!inSingleQuote && !inDoubleQuote) {
      unquotedKeepQuoteChars.write(char);
    }
  }

  return QuoteExtraction(
    withDoubleQuotes: withDoubleQuotes.toString(),
    fullyUnquoted: fullyUnquoted.toString(),
    unquotedKeepQuoteChars: unquotedKeepQuoteChars.toString(),
  );
}