forked from bufbuild/protoc-gen-validate
/
well_known.go
67 lines (58 loc) · 1.43 KB
/
well_known.go
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package shared
import (
"github.com/envoyproxy/protoc-gen-validate/validate"
"github.com/lyft/protoc-gen-star"
)
type WellKnown string
const (
Email WellKnown = "email"
Hostname WellKnown = "hostname"
UUID WellKnown = "uuid"
)
// Needs returns true if a well-known string validator is needed for this
// message.
func Needs(m pgs.Message, wk WellKnown) bool {
for _, f := range m.Fields() {
var rules validate.FieldRules
if _, err := f.Extension(validate.E_Rules, &rules); err != nil {
continue
}
switch {
case f.Type().IsRepeated() && f.Type().Element().ProtoType() == pgs.StringT:
if strRulesNeeds(rules.GetRepeated().GetItems().GetString_(), wk) {
return true
}
case f.Type().IsMap():
if f.Type().Key().ProtoType() == pgs.StringT &&
strRulesNeeds(rules.GetMap().GetKeys().GetString_(), wk) {
return true
}
if f.Type().Element().ProtoType() == pgs.StringT &&
strRulesNeeds(rules.GetMap().GetValues().GetString_(), wk) {
return true
}
case f.Type().ProtoType() == pgs.StringT:
if strRulesNeeds(rules.GetString_(), wk) {
return true
}
}
}
return false
}
func strRulesNeeds(rules *validate.StringRules, wk WellKnown) bool {
switch wk {
case Email:
if rules.GetEmail() {
return true
}
case Hostname:
if rules.GetEmail() || rules.GetHostname() || rules.GetAddress() {
return true
}
case UUID:
if rules.GetUuid() {
return true
}
}
return false
}