events.go

//  @author: Brian Wojtczak
//  @copyright: 2024 by Brian Wojtczak
//  @license: BSD-style license found in the LICENSE file

package main

import (
	"github.com/awesome-gocui/gocui"
	"github.com/pkg/errors"
)

var _ gocui.Manager = (*DialogLayoutManager)(nil)

type EventHandler func() error

type EventHandlers map[string]EventHandler

type SupportsEventHandlers interface {
	SetEventHandler(event string, handler EventHandler)
}

func NewEventHandlers() EventHandlers {
	return make(EventHandlers)
}

func (handlers EventHandlers) SetEventHandler(event string, handler EventHandler) {
	handlers[event] = handler
}

func (handlers EventHandlers) Handle(event string) error {
	if handler, ok := handlers[event]; ok && handler != nil {
		return handler()
	}
	return errors.Errorf("no handler for event %s", event)
}

func (handlers EventHandlers) BindKeyToEvent(gui *gocui.Gui, key interface{}, mod gocui.Modifier, event string) error {
	return gui.SetKeybinding("", key, mod, func(g *gocui.Gui, v *gocui.View) error {
		return handlers.Handle(event)
	})
}

func (handlers EventHandlers) BindKeysToEvents(gui *gocui.Gui, mod gocui.Modifier, mapping map[interface{}]string) error {
	for key, event := range mapping {
		if err := handlers.BindKeyToEvent(gui, key, mod, event); err != nil {
			return errors.WithStack(err)
		}
	}
	return nil
}