# text.ludic - is this the whole file? Every brace and bracket closed, every string closed, at least
# one opened. A JSON parser that is best-effort hands back half a file as a shorter, plausible one
# (`{"day":6,"money":7` is a day), so the text itself is what knows whether the write finished.
export function save_text_intact(s: string) -> bool {
  let n = len(s)
  if n < 2 { return false }
  var depth = 0
  var instr = false
  var esc = false
  var opened = false
  var i = 0
  while i < n {
    let c = s[i]
    if instr {
      if esc { esc = false }
      else if c == 92 { esc = true }               # a backslash: the next byte is literal
      else if c == 34 { instr = false }
    } else {
      if c == 34 {
        instr = true
      } else if c == 123 or c == 91 {
        depth += 1
        opened = true
      } else if c == 125 or c == 93 {
        depth -= 1
        if depth < 0 { return false }
      }
    }
    i += 1
  }
  return opened and depth == 0 and not instr
}