// Recursively resolve pointers to other factoids
func recurse(fact *factoids.Factoid, keys map[string]bool) {
val := fact.Value
key, start, end := util.FactPointer(val)
if key == "" {
return
}
if _, ok := keys[key]; ok || len(keys) > 20 {
fact.Value = val[:start] + "[circular reference]" + val[end:]
return
}
keys[key] = true
if f2 := fc.GetPseudoRand(key); f2 != nil {
fact.Value = val[:start] + f2.Value + val[end:]
if start == 0 && fact.Type != f2.Type {
// Propagate change of factoid type when the pointer
// is at the beginning of the string.
fact.Type = f2.Type
}
recurse(fact, keys)
return
}
// if we get here, we found a pointer key but no matching factoid
// so recurse on the stuff after that key *only* to avoid loops.
fact.Value = val[end:]
recurse(fact, keys)
fact.Value = val[:end] + fact.Value
}
