overleaf-cep/services/web/frontend/js/features/review-panel/utils/has-active-range.ts

import { Ranges } from '@/features/review-panel/context/ranges-context'
import { Threads } from '@/features/review-panel/context/threads-context'

export const hasActiveRange = (
  ranges: Ranges | undefined,
  threads: Threads | undefined
): boolean | undefined => {
  if (!ranges || !threads) {
    // data isn't loaded yet
    return undefined
  }

  if (ranges.changes.length > 0) {
    // at least one tracked change
    return true
  }

  for (const comment of ranges.comments) {
    const thread = threads[comment.op.t]
    if (thread && !thread.resolved) {
      return true
    }
  }

  return false
}