app/history/history.go

package history

import (
	"fmt"
	"time"

	"kumoly.io/kumoly/app/errors"
)

const (
	ERROR = "ERROR"
	INFO  = "INFO"
)

type History struct {
	ID        uint `gorm:"primaryKey"`
	CreatedAt time.Time

	Module string
	Type   string

	Message string
	Body    string
	Issuer  string
	Caller  string
	Trace   string
}

var Tunnel chan *History
var quit chan struct{}
var started chan struct{}

func init() {
	Tunnel = make(chan *History)
	quit = make(chan struct{}, 1)
	started = make(chan struct{}, 1)
}

func Start(r Receiver) {
	select {
	case started <- struct{}{}:
	default:
		panic(errors.New(500, "history has already started!"))
	}
	go func() {
		for {
			select {
			case h := <-Tunnel:
				r(h)
			case <-quit:
				<-started
				return
			}
		}
	}()
}

func Stop() {
	quit <- struct{}{}
}

func Send(h *History) {
	if h.Type == "" {
		h.Type = INFO
	}
	Tunnel <- h
}

type Receiver func(*History)

var DBReceiver Receiver = func(h *History) {

}

var ConsoleReceiver Receiver = func(h *History) {
	fmt.Printf("%+v\n", h)
}