Function parsePercentFormat

packages/convert/src/percent-to-deepnote.ts:46–150

(content: string)

 * ```
 */
export function parsePercentFormat(content: string): PercentNotebook {
  const cells: PercentCell[] = []
  const lines = content.split('\n')

  // Handle empty content
  if (lines.length === 0 || (lines.length === 1 && lines[0] === '')) {
    return { cells: [] }
  }

  // Regular expression to match cell markers
  // Matches: # %% [type] title tags=["a", "b"]
  const cellMarkerRegex = /^# %%\s*(?:\[(\w+)\])?\s*(.*)$/

  let currentCell: PercentCell | null = null
  let currentContent: string[] = []

  function finalizeCell() {
    if (currentCell) {
      // For markdown cells, strip the '# ' prefix from each line
      if (currentCell.cellType === 'markdown') {
        currentCell.content = currentContent
          .map(line => {
            if (line.startsWith('# ')) {
              return line.slice(2)
            }
            if (line === '#') {
              return ''
            }
            return line
          })
          .join('\n')
          .trim()
      } else {
        currentCell.content = currentContent.join('\n').trim()
      }
      cells.push(currentCell)
    }
    currentContent = []
  }

  for (const line of lines) {
    const match = cellMarkerRegex.exec(line)

    if (match) {
      // Finalize previous cell
      finalizeCell()

      // Parse cell type and metadata
      const cellTypeStr = match[1]?.toLowerCase() || 'code'
      const rest = match[2]?.trim() || ''

      let cellType: 'code' | 'markdown' | 'raw' = 'code'
      if (cellTypeStr === 'markdown' || cellTypeStr === 'md') {
        cellType = 'markdown'
      } else if (cellTypeStr === 'raw') {
        cellType = 'raw'
      }