notes

1.1 KB

1. // lib/notes-helpers.hl — what lib/notes.hl looks up (notes mission 002, code order): the size limit, the tombstone
2. // check, the version stamp and the copy mark of a conflict.
3. import { now } from 'hl:time'
5. static maxText = 200000
7. static textError = (text) => {
8. if (text == null || hlTypeName(text) != 'String') { return 'the note must be text' }
9. if (text.length > maxText) { return 'the note is too long (at most ' + maxText + ' characters)' }
10. return null
11. }
13. // alive = not deleted (gone == 0; the row of a deleted note stays as a tombstone)
14. static isAlive = (n) => { return n != null && (n.gone == null || n.gone == 0) }
16. // the version stamp of an edit made at `at` (the browser's clock): never in the future, always after `prev` —
17. // so the sidebar order is the order the edits were really made in, and a version stamp is never reused
18. static stampOf = (at, prev) => {
19. t = now()
20. cand = at > 0 && at < t ? at : t
21. return cand > prev ? cand : prev + 1
22. }
24. // the line at the end of the version that lost a conflict (kept as a note of its own)
25. static copyMark = '
27. *(kept as a copy: this note was changed on two devices at once)*'