104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
package schema
|
|
|
|
import (
|
|
"encoding/json"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
// cidRegex matches the CID shapes produced by @metazla/meta-hash:
|
|
// - CIDv1 multibase-base32: every algorithm (crc32, md5, sha1, sha2-256,
|
|
// sha3-256, sha3-384, midhash256, btih-v2, …) is serialized via
|
|
// CID.createV1(code, digest).toString(), which always yields a lowercase
|
|
// base32 string starting with "ba" (the "b" is the multibase tag, the
|
|
// "a" is the CIDv1 version byte under base32-encoding-of-0x01).
|
|
// - CIDv0 base58btc: "Qm" + 44 chars, kept for compatibility with other
|
|
// services that may still emit v0.
|
|
//
|
|
// Minimum CIDv1 length 16 chars matches the shortest real output we observed
|
|
// (crc32: "bafk3eaqerjhiwhy").
|
|
var cidRegex = regexp.MustCompile(`^(ba[a-z2-7]{14,}|Qm[1-9A-HJ-NP-Za-km-z]{44})$`)
|
|
|
|
// ClassifyValue returns the (primitive, hint) for a stored value.
|
|
// exists=false (key missing) and JSON null literal both map to PrimUndefined.
|
|
// Empty string is a valid string.
|
|
func ClassifyValue(value string, exists bool) (Primitive, Hint) {
|
|
if !exists {
|
|
return PrimUndefined, ""
|
|
}
|
|
trimmed := strings.TrimSpace(value)
|
|
if trimmed == "null" {
|
|
return PrimUndefined, ""
|
|
}
|
|
if trimmed == "true" || trimmed == "false" {
|
|
return PrimBool, ""
|
|
}
|
|
if _, err := strconv.ParseInt(trimmed, 10, 64); err == nil {
|
|
if isTimestampInt(trimmed) {
|
|
return PrimInt, HintTimestamp
|
|
}
|
|
return PrimInt, ""
|
|
}
|
|
if _, err := strconv.ParseFloat(trimmed, 64); err == nil {
|
|
return PrimFloat, ""
|
|
}
|
|
if len(trimmed) > 0 {
|
|
switch trimmed[0] {
|
|
case '{':
|
|
var v map[string]any
|
|
if json.Unmarshal([]byte(trimmed), &v) == nil {
|
|
return PrimJSONObj, ""
|
|
}
|
|
case '[':
|
|
var v []any
|
|
if json.Unmarshal([]byte(trimmed), &v) == nil {
|
|
return PrimJSONArr, ""
|
|
}
|
|
}
|
|
}
|
|
if cidRegex.MatchString(value) {
|
|
return PrimString, HintCID
|
|
}
|
|
if isTimestampString(value) {
|
|
return PrimString, HintTimestamp
|
|
}
|
|
return PrimString, ""
|
|
}
|
|
|
|
// isTimestampInt accepts unix-seconds in [2001-09, 2100] or unix-millis in the
|
|
// same range. Anything else is treated as a plain int.
|
|
func isTimestampInt(s string) bool {
|
|
n, err := strconv.ParseInt(s, 10, 64)
|
|
if err != nil || n <= 0 {
|
|
return false
|
|
}
|
|
if n >= 1_000_000_000 && n <= 4_102_444_800 {
|
|
return true
|
|
}
|
|
if n >= 1_000_000_000_000 && n <= 4_102_444_800_000 {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func isTimestampString(s string) bool {
|
|
if _, err := time.Parse(time.RFC3339, s); err == nil {
|
|
return true
|
|
}
|
|
if _, err := time.Parse("2006-01-02", s); err == nil {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// breakdownLabel returns the most specific label for a classified value.
|
|
// Hints take precedence over primitives.
|
|
func breakdownLabel(prim Primitive, hint Hint) string {
|
|
if hint != "" {
|
|
return string(hint)
|
|
}
|
|
return string(prim)
|
|
}
|