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package opsgenie
import (
"errors"
"fmt"
"regexp"
"strings"
)
// EntityPartsCount is the expected number of parts in an entity string (type:identifier).
const (
EntityPartsCount = 2 // Expected number of parts in an entity string (type:identifier)
)
// ErrInvalidEntityFormat indicates that the entity string does not have two elements separated by a colon.
var (
ErrInvalidEntityFormat = errors.New(
"invalid entity, should have two elements separated by colon",
)
ErrInvalidEntityIDName = errors.New("invalid entity, cannot parse id/name")
ErrUnexpectedEntityType = errors.New("invalid entity, unexpected entity type")
ErrMissingEntityIdentity = errors.New("invalid entity, should have either ID, name or username")
)
// Entity represents an OpsGenie entity (e.g., user, team) with type and identifier.
// Example JSON: { "username":"trinity@opsgenie.com", "type":"user" }.
type Entity struct {
Type string `json:"type"`
ID string `json:"id,omitempty"`
Name string `json:"name,omitempty"`
Username string `json:"username,omitempty"`
}
// SetFromProp deserializes an entity from a string in the format "type:identifier".
func (e *Entity) SetFromProp(propValue string) error {
elements := strings.Split(propValue, ":")
if len(elements) != EntityPartsCount {
return fmt.Errorf("%w: %q", ErrInvalidEntityFormat, propValue)
}
e.Type = elements[0]
identifier := elements[1]
isID, err := isOpsGenieID(identifier)
if err != nil {
return fmt.Errorf("%w: %q", ErrInvalidEntityIDName, identifier)
}
switch {
case isID:
e.ID = identifier
case e.Type == "team":
e.Name = identifier
case e.Type == "user":
e.Username = identifier
default:
return fmt.Errorf("%w: %q", ErrUnexpectedEntityType, e.Type)
}
return nil
}
// GetPropValue serializes an entity back into a string in the format "type:identifier".
func (e *Entity) GetPropValue() (string, error) {
var identifier string
switch {
case e.ID != "":
identifier = e.ID
case e.Name != "":
identifier = e.Name
case e.Username != "":
identifier = e.Username
default:
return "", ErrMissingEntityIdentity
}
return fmt.Sprintf("%s:%s", e.Type, identifier), nil
}
// isOpsGenieID checks if a string matches the OpsGenie ID format (e.g., 4513b7ea-3b91-438f-b7e4-e3e54af9147c).
func isOpsGenieID(str string) (bool, error) {
matched, err := regexp.MatchString(
`^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$`,
str,
)
if err != nil {
return false, fmt.Errorf("matching OpsGenie ID format for %q: %w", str, err)
}
return matched, nil
}
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