forked from cloudevents/sdk-go
/
defaulters.go
52 lines (45 loc) · 1.45 KB
/
defaulters.go
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package client
import (
"context"
"time"
"github.com/ian-mi/sdk-go/v2/pkg/event"
"github.com/google/uuid"
)
// EventDefaulter is the function signature for extensions that are able
// to perform event defaulting.
type EventDefaulter func(ctx context.Context, event event.Event) event.Event
// DefaultIDToUUIDIfNotSet will inspect the provided event and assign a UUID to
// context.ID if it is found to be empty.
func DefaultIDToUUIDIfNotSet(ctx context.Context, event event.Event) event.Event {
if event.Context != nil {
if event.ID() == "" {
event.Context = event.Context.Clone()
event.SetID(uuid.New().String())
}
}
return event
}
// DefaultTimeToNowIfNotSet will inspect the provided event and assign a new
// Timestamp to context.Time if it is found to be nil or zero.
func DefaultTimeToNowIfNotSet(ctx context.Context, event event.Event) event.Event {
if event.Context != nil {
if event.Time().IsZero() {
event.Context = event.Context.Clone()
event.SetTime(time.Now())
}
}
return event
}
// NewDefaultDataContentTypeIfNotSet returns a defaulter that will inspect the
// provided event and set the provided content type if content type is found
// to be empty.
func NewDefaultDataContentTypeIfNotSet(contentType string) EventDefaulter {
return func(ctx context.Context, event event.Event) event.Event {
if event.Context != nil {
if event.DataContentType() == "" {
event.SetDataContentType(contentType)
}
}
return event
}
}