Function extractUncheckedTaskBlocks

packages/shared-domain/src/tasklists.ts:302–352

(markdown: string)

 * Returns the moved raw lines (in document order) and the remaining body.
 */
export function extractUncheckedTaskBlocks(markdown: string): {
  moved: string[]
  rest: string
} {
  const lines = markdown.split('\n')
  const consumed = new Array<boolean>(lines.length).fill(false)
  const moved: string[] = []
  let inFence = false
  let fenceMarker: string | null = null

  for (let i = 0; i < lines.length; i++) {
    const line = lines[i]
    const fenceMatch = line.match(FENCE_RE)
    if (fenceMatch) {
      const marker = fenceMatch[2]
      if (!inFence) {
        inFence = true
        fenceMarker = marker
      } else if (marker === fenceMarker) {
        inFence = false
        fenceMarker = null
      }
      continue
    }
    if (inFence) continue

    const taskMatch = line.match(TASK_LINE_RE)
    if (!taskMatch) continue
    if (taskMatch[2] !== ' ') continue // only unchecked tasks roll over

    const baseIndent = leadingIndentWidth(line)
    moved.push(line)
    consumed[i] = true

    // Carry indented continuation/child lines along with the task.
    let j = i + 1
    while (j < lines.length) {
      const next = lines[j]
      if (next.trim() === '') break
      if (FENCE_RE.test(next)) break
      if (leadingIndentWidth(next) <= baseIndent) break
      moved.push(next)
      consumed[j] = true
      j++
    }
    i = j - 1 // skip the consumed block (its children are not new tasks)
  }

  const rest = lines.filter((_, idx) => !consumed[idx]).join('\n')
  return { moved, rest }
}