add constructor functions with options. update tests.

events/event.go

@@ -3,6 +3,10 @@
 // serialization, cryptographic signatures, and subscription filters.
 package events
 
+import (
+	"time"
+)
+
 // Tag represents a single tag within an event as an array of strings.
 // The first element identifies the tag name, the second contains the value,
 // and subsequent elements are optional.
@@ -13,9 +17,67 @@ type Tag []string
 type Event struct {
 	ID        string `json:"id"`
 	PubKey    string `json:"pubkey"`
-	CreatedAt int    `json:"created_at"`
+	CreatedAt int64  `json:"created_at"`
 	Kind      int    `json:"kind"`
 	Tags      []Tag  `json:"tags"`
 	Content   string `json:"content"`
 	Sig       string `json:"sig"`
 }
+
+func NewEvent(opts ...EventOption) Event {
+	e := Event{Tags: make([]Tag, 0)}
+	for _, opt := range opts {
+		opt(&e)
+	}
+	return e
+}
+
+type EventOption func(*Event)
+
+func WithID(id string) EventOption {
+	return func(e *Event) {
+		e.ID = id
+	}
+}
+
+func WithPubKey(pk string) EventOption {
+	return func(e *Event) {
+		e.PubKey = pk
+	}
+}
+
+func WithCreatedAt(t int64) EventOption {
+	return func(e *Event) {
+		e.CreatedAt = t
+	}
+}
+
+func WithCreatedAtTime(t time.Time) EventOption {
+	return func(e *Event) {
+		e.CreatedAt = t.Unix()
+	}
+}
+
+func WithKind(k int) EventOption {
+	return func(e *Event) {
+		e.Kind = k
+	}
+}
+
+func WithTag(t Tag) EventOption {
+	return func(e *Event) {
+		e.Tags = append(e.Tags, t)
+	}
+}
+
+func WithContent(c string) EventOption {
+	return func(e *Event) {
+		e.Content = c
+	}
+}
+
+func WithSig(s string) EventOption {
+	return func(e *Event) {
+		e.Sig = s
+	}
+}