//go:build go1.18
// +build go1.18

package zerolog

import "fmt"

// ObjectsV adds the field key with objs as an array of objects that
// implement the LogObjectMarshaler interface to the event.
//
// This is a generic free function version that accepts a slice of
// LogObjectMarshaler-derived values.
func ObjectsE[T LogObjectMarshaler](e *Event, key string, objs []T) *Event {
	if e == nil {
		return e
	}
	e.buf = enc.AppendArrayStart(enc.AppendKey(e.buf, key))
	for i, obj := range objs {
		e.buf = appendObject(e.buf, obj, e.stack, e.ctx, e.ch)
		if i < (len(objs) - 1) {
			e.buf = enc.AppendArrayDelim(e.buf)
		}
	}
	e.buf = enc.AppendArrayEnd(e.buf)
	return e
}

func ExampleObjects() {
	// User implements zerolog.LogObjectMarshaler
	u := User{"John", 35, time.Time{}}
	u2 := User{"Bono", 54, time.Time{}}
	users := []User{u, u2}

	logger := zerolog.New(os.Stdout)
	event := logger.Log()

	zerolog.ObjectsE(event, "users", users).Msg("hello world")
	// Output: {"users":[{"name":"John","age":35,"created":"0001-01-01T00:00:00Z"},{"name":"Bono","age":54,"created":"0001-01-01T00:00:00Z"}],"message":"hello world"}
}

// StringersV adds the field key with vals to the *Event context.
// If any val is not nil, it is added by calling val.String().
// If val is nil, it is encoded as null without calling String().
//
// This is a generic free function version that accepts a listslice of
// fmt.Stringer values.
func StringersV(e *Event, key string, vals []fmt.Stringer) *Event {
	if e == nil {
		return e
	}
	e.buf = // insert loop from enc.AppendStringers ... ugh
	// enc.AppendStringers(enc.AppendKey(e.buf, key), vals)
	return e
}