Function takeTaskLineAtIndex

packages/shared-domain/src/tasklists.ts:242–276

(
  markdown: string,
  taskIndex: number
)

 *  counting tasks the same way the parser does so the index stays in lockstep.
 *  Used to move a task to another note. */
export function takeTaskLineAtIndex(
  markdown: string,
  taskIndex: number
): { line: string | null; body: string } {
  if (taskIndex < 0) return { line: null, body: markdown }
  const lines = markdown.split('\n')
  let currentTaskIndex = 0
  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
    if (!TASK_LINE_RE.test(line)) continue
    if (currentTaskIndex !== taskIndex) {
      currentTaskIndex += 1
      continue
    }
    const removed = lines[i]
    lines.splice(i, 1)
    return { line: removed, body: lines.join('\n') }
  }
  return { line: null, body: markdown }
}

/** Delete the task line at `taskIndex` entirely. */
export function removeTaskAtIndex(markdown: string, taskIndex: number): string {