arcast/pkg/browser/lorca/browser.go

package lorca

import (
	"context"

	"forge.cadoles.com/arcad/arcast/pkg/browser"
	"github.com/pkg/errors"
	"github.com/zserge/lorca"
	"gitlab.com/wpetit/goweb/logger"
)

type Browser struct {
	ui     lorca.UI
	status browser.Status
	opts   *Options
}

func (b *Browser) Start() error {
	logger.Debug(context.Background(), "starting browser", logger.F("opts", b.opts))

	ui, err := lorca.New("", "", b.opts.Width, b.opts.Height, b.opts.ChromeArgs...)
	if err != nil {
		return errors.WithStack(err)
	}

	b.ui = ui

	return nil
}

func (b *Browser) Stop() error {
	if err := b.ui.Close(); err != nil {
		return errors.WithStack(err)
	}

	b.ui = nil

	return nil
}

func (b *Browser) Wait() {
	<-b.ui.Done()
}

// Load implements browser.Browser.
func (b *Browser) Load(url string) error {
	if err := b.ui.Load(url); err != nil {
		return errors.WithStack(err)
	}

	b.status = browser.StatusCasting

	return nil
}

// Unload implements browser.Browser.
func (b *Browser) Reset(url string) error {
	if err := b.ui.Load(url); err != nil {
		return errors.WithStack(err)
	}

	b.status = browser.StatusIdle

	return nil
}

// Status implements browser.Browser.
func (b *Browser) Status() (browser.Status, error) {
	return b.status, nil
}

// Title implements browser.Browser.
func (b *Browser) Title() (string, error) {
	result := b.ui.Eval("document.title.toString()")
	if err := result.Err(); err != nil {
		return "", errors.WithStack(err)
	}

	return result.String(), nil
}

// URL implements browser.Browser.
func (b *Browser) URL() (string, error) {
	result := b.ui.Eval("window.location.toString()")
	if err := result.Err(); err != nil {
		return "", errors.WithStack(err)
	}

	return result.String(), nil
}

func NewBrowser(funcs ...OptionsFunc) *Browser {
	opts := NewOptions(funcs...)
	return &Browser{
		status: browser.StatusIdle,
		opts:   opts,
	}
}

var _ browser.Browser = &Browser{}