package db

import "errors"

// Sentinel errors returned by the dynamic-config and IP-queue admin
// mutations. Callers (internal/httpapi) map these to HTTP status codes via
// errors.Is rather than defaulting everything to 500.
var (
	// ErrNotFound: the referenced entity does not exist.
	ErrNotFound = errors.New("not found")
	// ErrConflict: the entity already exists, or a unique slot/key is
	// already taken by something else.
	ErrConflict = errors.New("conflict")
	// ErrBusy: the entity can't be removed because it's currently in use
	// (e.g. a validator that owns an in-progress IP).
	ErrBusy = errors.New("busy")
	// ErrInUse: the entity can't be removed because something else
	// references it (e.g. a target group referenced by a check type).
	ErrInUse = errors.New("in use")
	// ErrValidation: the request is well-formed but refers to something
	// invalid (e.g. a check type naming a target group that doesn't exist).
	ErrValidation = errors.New("validation failed")
	// ErrInvalidState: the requested state transition isn't valid from the
	// entity's current state (e.g. cancelling an already-finished IP).
	ErrInvalidState = errors.New("invalid state")
)