main.go

package cdp

import (
	"log"
	"os"
	"sync"
	"time"
)

// LogLevelValue is the type for loglevel information.
type LogLevelValue int

const (
	// LogBasic records outgoing commands, their replies, and any specified events.
	LogBasic = LogLevelValue(0)
	// LogDetails records additional details about the reply from the server for a given command/event.
	LogDetails = LogLevelValue(1)
	// LogAll records everything.
	LogAll = LogLevelValue(2)
)

func init() {
	file, err := os.Create("cdp.log")
	if err != nil {
		panic(err)
	}
	log.SetFlags(log.Llongfile | log.LstdFlags | log.Lmicroseconds)
	log.SetOutput(file)
}

// Start prepares required resources to begin automation.
func Start(browser *Browser, logLevel LogLevelValue) *Frame {
	// If browser is nil, the chrome protocal testing will still function as long as a browser is already
	// properly open and listening for chrome devtools protocol requests on port 9222.
	port := 9222
	if browser != nil {
		port = browser.Port
	}
	frame := &Frame{
		RWMutex: &sync.RWMutex{},
		RequestID: RequestID{
			RWMutex: &sync.RWMutex{},
			Value:   11111,
		},
		Browser:           browser,
		Conn:              GetWebsocket(browser.Log, port),
		CurrentAction:     &Action{},
		CacheCompleteChan: make(chan struct{}),
		ActionChan:        make(chan []byte),
		CommandChan:       make(chan (<-chan time.Time)),
		AllComplete:       make(chan struct{}),
		LogLevel:          logLevel,
	}
	go Write(frame)
	go Read(frame)

	return frame
}