package festival_test

import (
	"context"
	"fmt"

	"git.golem15.com/golem15/summercms/modules/festival"
)

// PostPublished is the event the acme.blog plugin fires after a post goes live.
type PostPublished struct {
	Title string
}

func ExampleBus_Fire() {
	bus := festival.New() // in a plugin, use app.Events

	// acme.search and acme.notify extend acme.blog from their Boot steps.
	bus.Listen("acme.search", func(ctx context.Context, e PostPublished) error {
		fmt.Println("index", e.Title)
		return nil
	})
	bus.ListenPriority("acme.notify", 10, func(ctx context.Context, e PostPublished) error {
		fmt.Println("notify subscribers of", e.Title)
		return nil
	})

	// acme.blog fires the event; higher priorities run first.
	if err := bus.Fire(context.Background(), PostPublished{Title: "Hello"}); err != nil {
		fmt.Println(err)
	}
	// Output:
	// notify subscribers of Hello
	// index Hello
}