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chatlabels.go
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78 lines (66 loc) · 2.15 KB
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package httpapi
import (
"fmt"
"regexp"
"github.com/coder/coder/v2/codersdk"
)
const (
// maxLabelsPerChat is the maximum number of labels allowed on a
// single chat.
maxLabelsPerChat = 50
// maxLabelKeyLength is the maximum length of a label key in bytes.
maxLabelKeyLength = 64
// maxLabelValueLength is the maximum length of a label value in
// bytes.
maxLabelValueLength = 256
)
// labelKeyRegex validates that a label key starts with an alphanumeric
// character and is followed by alphanumeric characters, dots, hyphens,
// underscores, or forward slashes.
var labelKeyRegex = regexp.MustCompile(`^[a-zA-Z0-9][a-zA-Z0-9._/-]*$`)
// ValidateChatLabels checks that the provided labels map conforms to the
// labeling constraints for chats. It returns a list of validation
// errors, one per violated constraint.
func ValidateChatLabels(labels map[string]string) []codersdk.ValidationError {
var errs []codersdk.ValidationError
if len(labels) > maxLabelsPerChat {
errs = append(errs, codersdk.ValidationError{
Field: "labels",
Detail: fmt.Sprintf("too many labels (%d); maximum is %d", len(labels), maxLabelsPerChat),
})
}
for k, v := range labels {
if k == "" {
errs = append(errs, codersdk.ValidationError{
Field: "labels",
Detail: "label key must not be empty",
})
continue
}
if len(k) > maxLabelKeyLength {
errs = append(errs, codersdk.ValidationError{
Field: "labels",
Detail: fmt.Sprintf("label key %q exceeds maximum length of %d bytes", k, maxLabelKeyLength),
})
}
if !labelKeyRegex.MatchString(k) {
errs = append(errs, codersdk.ValidationError{
Field: "labels",
Detail: fmt.Sprintf("label key %q contains invalid characters; must match %s", k, labelKeyRegex.String()),
})
}
if v == "" {
errs = append(errs, codersdk.ValidationError{
Field: "labels",
Detail: fmt.Sprintf("label value for key %q must not be empty", k),
})
}
if len(v) > maxLabelValueLength {
errs = append(errs, codersdk.ValidationError{
Field: "labels",
Detail: fmt.Sprintf("label value for key %q exceeds maximum length of %d bytes", k, maxLabelValueLength),
})
}
}
return errs
}