a654e96d66
- App-owned festival bus with Fire, Collect and UntilHandled - Recover listener panics with owner plugin IDs; isolate buses per app - towel context accessors and hello command demo of all three modes
114 lines
2.8 KiB
Go
114 lines
2.8 KiB
Go
package greeter
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import (
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"context"
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"git.golem15.com/golem15/summercms/backpack"
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"git.golem15.com/golem15/summercms/bonfire"
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"git.golem15.com/golem15/summercms/festival"
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"git.golem15.com/golem15/summercms/pact"
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"git.golem15.com/golem15/summercms/party"
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"git.golem15.com/golem15/summercms/towel"
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)
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var _ festival.Collectable = (*HelloEvent)(nil)
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var _ festival.Handleable = (*HelloEvent)(nil)
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// Plugin is the golem15.greeter plugin. It requires golem15.hello.
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type Plugin struct {
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app *backpack.App
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extra string
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}
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func (p *Plugin) ID() string { return "golem15.greeter" }
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func (p *Plugin) Requires() []string { return []string{"golem15.hello"} }
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func (p *Plugin) Register(*backpack.App) error { return nil }
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func (p *Plugin) Boot(app *backpack.App) error {
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p.app = app
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p.extra = ""
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if app != nil && app.HasPlugin("golem15.optional") {
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if msg, ok := app.Lookup[pact.OptionalMessage](); ok {
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p.extra = msg.Message()
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}
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}
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if app != nil && app.Events != nil {
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app.Events.Listen[*HelloEvent]("golem15.greeter", func(ctx context.Context, e *HelloEvent) error {
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if e.data == nil {
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e.data = map[string]any{}
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}
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e.data["source"] = "greeter"
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if actor, ok := towel.Actor(ctx); ok {
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e.data["actor"] = actor
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}
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e.handled = true
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return nil
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})
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}
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return nil
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}
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func (p *Plugin) Commands() []bonfire.Command {
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return []bonfire.Command{{
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Name: "greeter:hello",
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Description: "Print the configured application name",
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Run: func(ctx context.Context, in bonfire.Input, out bonfire.Output) error {
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name := ""
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posts := 0
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debug := false
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if p.app != nil && p.app.Config != nil {
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name = p.app.Config.String("app.name")
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posts = p.app.Config.Int("golem15.hello.posts_per_page")
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debug = p.app.Config.Bool("app.debug")
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}
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events := "ok"
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collected := ""
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handled := false
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if p.app != nil && p.app.Events != nil {
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if err := p.app.Events.Fire(ctx, &HelloEvent{}); err != nil {
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events = "err"
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}
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payload, err := p.app.Events.Collect(ctx, &HelloEvent{})
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if err != nil {
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events = "err"
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}
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if src, ok := payload["source"].(string); ok {
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collected = src
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}
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ok, err := p.app.Events.UntilHandled(ctx, &HelloEvent{})
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if err != nil {
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events = "err"
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}
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handled = ok
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}
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out.Printf("name=%s posts_per_page=%d debug=%t extra=%s events=%s collected=%s handled=%t\n", name, posts, debug, p.extra, events, collected, handled)
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return nil
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},
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}}
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}
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// HelloEvent is a typed greeter event used to demonstrate Fire, Collect
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// and UntilHandled on the app bus.
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type HelloEvent struct {
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data map[string]any
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handled bool
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}
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func (e *HelloEvent) Collected() map[string]any {
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if e == nil {
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return nil
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}
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return e.data
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}
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func (e *HelloEvent) IsHandled() bool {
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return e != nil && e.handled
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}
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var _ pact.HasCommands = (*Plugin)(nil)
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func init() {
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party.Register(&Plugin{})
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}
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