List _processBlock()

in packages/snippets/lib/snippet_generator.dart [181:236]

• 53 lines of code
• 17 McCabe index (conditional complexity)

  List<SourceLine> _processBlock(List<SourceLine> block) {
    final String firstLine = block.first.text;
    if (firstLine.startsWith('new ') ||
        firstLine.startsWith(_constructorRegExp)) {
      _expressionId += 1;
      return _surround('dynamic expression$_expressionId = ', block, ';');
    } else if (firstLine.startsWith('await ')) {
      _expressionId += 1;
      return _surround(
          'Future<void> expression$_expressionId() async { ', block, ' }');
    } else if (block.first.text.startsWith('class ') ||
        block.first.text.startsWith('enum ')) {
      return block;
    } else if ((block.first.text.startsWith('_') ||
            block.first.text.startsWith('final ')) &&
        block.first.text.contains(' = ')) {
      _expressionId += 1;
      return _surround(
          'void expression$_expressionId() { ', block.toList(), ' }');
    } else {
      final List<SourceLine> buffer = <SourceLine>[];
      int blocks = 0;
      SourceLine? subLine;
      final List<SourceLine> subsections = <SourceLine>[];
      for (int index = 0; index < block.length; index += 1) {
        // Each section of the dart code that is either split by a blank line, or with
        // '// ...' is treated as a separate code block.
        if (block[index].text.trim().isEmpty || block[index].text == '// ...') {
          if (subLine == null) {
            continue;
          }
          blocks += 1;
          subsections.addAll(_processBlock(buffer));
          buffer.clear();
          assert(buffer.isEmpty);
          subLine = null;
        } else if (block[index].text.startsWith('// ')) {
          if (buffer.length > 1) // don't include leading comments
            buffer.add(SourceLine(
                '/${block[index].text}')); // so that it doesn't start with "// " and get caught in this again
        } else {
          subLine ??= block[index];
          buffer.add(block[index]);
        }
      }
      if (blocks > 0) {
        if (subLine != null) {
          subsections.addAll(_processBlock(buffer));
        }
        // Combine all of the subsections into one section, now that they've been processed.
        return subsections;
      } else {
        return block;
      }
    }
  }