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Add session-scoped seq() builtin; move uuid v4 from locales to misc only

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lilleman
2026-06-09 01:52:39 +02:00
parent ae41e6bb97
commit cde56b7924
9 changed files with 124 additions and 66 deletions
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builtins.go
+35 -15
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@@ -15,22 +15,32 @@ import (
// the wall clock. Add a builtin only for what data can't express: a random v4
// UUID already ships as data (data/misc/uuid.json), so the builtin is v7.
var builtins = map[string]builtin{
"luhn": {arity: 0, call: func(_ rng, e string, _ []string) string { return string(rune('0' + luhnCheck(e))) }},
"mod11": {arity: 0, call: func(_ rng, e string, _ []string) string { return mod11Check(e) }},
"ean": {arity: 0, call: func(_ rng, e string, _ []string) string { return eanCheck(e) }},
"uuid": {arity: 0, call: func(r rng, _ string, _ []string) string { return uuidV7(r) }},
"ulid": {arity: 0, call: func(r rng, _ string, _ []string) string { return ulid(r) }},
"objectid": {arity: 0, call: func(r rng, _ string, _ []string) string { return randHex(r, 24) }},
"nanoid": {arity: 1, check: posIntArg, call: func(r rng, _ string, a []string) string { return nanoid(r, atoi(a[0])) }},
"hex": {arity: 1, check: posIntArg, call: func(r rng, _ string, a []string) string { return randHex(r, atoi(a[0])) }},
"base64": {arity: 1, check: posIntArg, call: func(r rng, _ string, a []string) string {
return base64.StdEncoding.EncodeToString(randBytes(r, atoi(a[0])))
"luhn": {arity: 0, call: func(_ *session, e string, _ []string) string { return string(rune('0' + luhnCheck(e))) }},
"mod11": {arity: 0, call: func(_ *session, e string, _ []string) string { return mod11Check(e) }},
"ean": {arity: 0, call: func(_ *session, e string, _ []string) string { return eanCheck(e) }},
"uuid": {arity: 0, call: func(s *session, _ string, _ []string) string { return uuidV7(s) }},
"ulid": {arity: 0, call: func(s *session, _ string, _ []string) string { return ulid(s) }},
"objectid": {arity: 0, call: func(s *session, _ string, _ []string) string { return randHex(s, 24) }},
"nanoid": {arity: 1, check: posIntArg, call: func(s *session, _ string, a []string) string { return nanoid(s, atoi(a[0])) }},
"hex": {arity: 1, check: posIntArg, call: func(s *session, _ string, a []string) string { return randHex(s, atoi(a[0])) }},
"base64": {arity: 1, check: posIntArg, call: func(s *session, _ string, a []string) string {
return base64.StdEncoding.EncodeToString(randBytes(s, atoi(a[0])))
}},
"int": {arity: 2, check: intRangeArgs, call: func(r rng, _ string, a []string) string {
return strconv.Itoa(atoi(a[0]) + r.IntN(atoi(a[1])-atoi(a[0])+1))
"int": {arity: 2, check: intRangeArgs, call: func(s *session, _ string, a []string) string {
return strconv.Itoa(atoi(a[0]) + s.IntN(atoi(a[1])-atoi(a[0])+1))
}},
"float": {arity: 3, check: floatArgs, call: floatCall},
"iban": {arity: 1, check: ibanArg, call: func(r rng, _ string, a []string) string { return iban(r, a[0]) }},
"iban": {arity: 1, check: ibanArg, call: func(s *session, _ string, a []string) string { return iban(s, a[0]) }},
// seq is the one stateful builtin: a per-session counter from 1, advancing on
// each call. An optional name selects an independent counter; no name uses the
// default one. Deterministic by construction, so a seeded faker stays stable.
"seq": {arity: -1, check: seqArg, call: func(s *session, _ string, a []string) string {
key := ""
if len(a) == 1 {
key = a[0]
}
return strconv.FormatUint(s.next(key), 10)
}},
}
const hexDigits = "0123456789abcdef"
@@ -89,10 +99,20 @@ func floatArgs(a []string) error {
return nil
}
func floatCall(r rng, _ string, a []string) string {
func floatCall(s *session, _ string, a []string) string {
lo, _ := strconv.ParseFloat(a[0], 64)
hi, _ := strconv.ParseFloat(a[1], 64)
return strconv.FormatFloat(lo+r.Float64()*(hi-lo), 'f', atoi(a[2]), 64)
return strconv.FormatFloat(lo+s.Float64()*(hi-lo), 'f', atoi(a[2]), 64)
}
func seqArg(a []string) error {
if len(a) > 1 {
return fmt.Errorf("seq takes at most one name, got %d args", len(a))
}
if len(a) == 1 && a[0] == "" {
return fmt.Errorf("seq name must not be empty")
}
return nil
}
// nanoidAlphabet is the 64-char URL-safe set Nano IDs use (order is irrelevant