buildDocx function

Uint8List buildDocx(String body, { String? styles, String? numbering, String? footnotes, String? endnotes, String relationships = '', Map<String, List<int>> media = const {}, })

Builds a minimal .docx for tests: body is the w:body content (the w: and r: prefixes are declared), and styles, numbering, footnotes and endnotes are the inner XML of those parts when given. relationships adds Relationship elements to the document's rels; media adds files under word/.

Implementation

Uint8List buildDocx(
  String body, {
  String? styles,
  String? numbering,
  String? footnotes,
  String? endnotes,
  String relationships = '',
  Map<String, List<int>> media = const {},
}) {
  final archive = Archive();
  void add(String name, String text) => archive.addFile(ArchiveFile.bytes(name, utf8.encode(text)));
  String part(String root, String inner) =>
      '<?xml version="1.0" encoding="UTF-8"?><w:$root xmlns:w="$_w" xmlns:r="$_r">$inner</w:$root>';

  add(
    '_rels/.rels',
    '<?xml version="1.0" encoding="UTF-8"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">'
        '<Relationship Id="rId1" Type="$_r/officeDocument" Target="word/document.xml"/></Relationships>',
  );
  add('word/document.xml', part('document', '<w:body>$body</w:body>'));
  final rels = StringBuffer(relationships);
  void link(String id, String type, String target, String? inner, String root) {
    if (inner == null) return;
    add('word/$target', part(root, inner));
    rels.write('<Relationship Id="$id" Type="$_r/$type" Target="$target"/>');
  }

  link('rIdStyles', 'styles', 'styles.xml', styles, 'styles');
  link('rIdNumbering', 'numbering', 'numbering.xml', numbering, 'numbering');
  link('rIdFootnotes', 'footnotes', 'footnotes.xml', footnotes, 'footnotes');
  link('rIdEndnotes', 'endnotes', 'endnotes.xml', endnotes, 'endnotes');
  add(
    'word/_rels/document.xml.rels',
    '<?xml version="1.0" encoding="UTF-8"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">$rels</Relationships>',
  );
  media.forEach((name, bytes) => archive.addFile(ArchiveFile.bytes('word/$name', bytes)));
  return Uint8List.fromList(ZipEncoder().encodeBytes(archive));
}