parseParagraphs function

ParseParagraphsResult parseParagraphs(List<EpubChapter> chapters, EpubContent? content)

Implementation

ParseParagraphsResult parseParagraphs(
  List<EpubChapter> chapters,
  EpubContent? content,
) {
  String? filename = '';
  final List<int> chapterIndexes = [];
  final paragraphs = chapters.fold<List<Paragraph>>(
    [],
    (acc, next) {
      List<dom.Element> elmList = [];
      if (filename != next.ContentFileName) {
        filename = next.ContentFileName;
        final document = EpubCfiReader().chapterDocument(next);
        if (document != null) {
          final result = convertDocumentToElements(document);
          elmList = _removeAllDiv(result);
        }
      }

      if (next.Anchor == null) {
        // last element from document index as chapter index
        chapterIndexes.add(acc.length);
        acc.addAll(elmList
            .map((element) => Paragraph(element, chapterIndexes.length - 1)));
        return acc;
      } else {
        final index = elmList.indexWhere(
          (elm) => elm.outerHtml.contains(
            'id="${next.Anchor}"',
          ),
        );
        if (index == -1) {
          chapterIndexes.add(acc.length);
          acc.addAll(elmList
              .map((element) => Paragraph(element, chapterIndexes.length - 1)));
          return acc;
        }

        chapterIndexes.add(index);
        acc.addAll(elmList
            .map((element) => Paragraph(element, chapterIndexes.length - 1)));
        return acc;
      }
    },
  );

  return ParseParagraphsResult(paragraphs, chapterIndexes);
}