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linebotservice.go
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linebotservice.go
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package linebotservice
import (
"context"
"log"
"net/http"
"github.com/Zhima-Mochi/go-linebot-service/messageservice/messagecorefactory"
"github.com/line/line-bot-sdk-go/v7/linebot"
)
type MessageService interface {
SetDefaultMessageCore(messageCore messagecorefactory.MessageCore)
GetDefaultMessageCore() messagecorefactory.MessageCore
SetCustomMessageTypeCore(messageType linebot.MessageType, messageCore messagecorefactory.MessageCore)
GetCustomMessageTypeCore(messageType linebot.MessageType) messagecorefactory.MessageCore
ClearCustomMessageTypeCore(messageType linebot.MessageType)
ClearAllCustomMessageTypeCore()
Process(ctx context.Context, event *linebot.Event) (linebot.SendingMessage, error)
}
type LineBotService struct {
LineBotClient *linebot.Client
MessageService MessageService
maxGoRoutines int32
goroutinePool chan struct{}
}
func NewLineBotService(lineBotClient *linebot.Client, messageService MessageService, options ...WithOption) *LineBotService {
l := &LineBotService{
LineBotClient: lineBotClient,
MessageService: messageService,
maxGoRoutines: 10,
}
for _, option := range options {
option(l)
}
l.goroutinePool = make(chan struct{}, l.maxGoRoutines)
return l
}
func (l *LineBotService) HandleEvents(w http.ResponseWriter, req *http.Request) {
ctx := context.Background()
events, err := l.LineBotClient.ParseRequest(req)
if err != nil {
log.Print(err)
if err == linebot.ErrInvalidSignature {
w.WriteHeader(http.StatusBadRequest)
} else {
w.WriteHeader(http.StatusInternalServerError)
}
return
}
l.handleEvents(ctx, events)
}
func (l *LineBotService) handleEvents(ctx context.Context, events []*linebot.Event) {
for _, event := range events {
l.goroutinePool <- struct{}{}
l.handleEvent(ctx, event)
}
}
func (l *LineBotService) handleEvent(ctx context.Context, event *linebot.Event) {
defer func() {
<-l.goroutinePool
}()
if event.Type == linebot.EventTypeMessage {
message, err := l.MessageService.Process(ctx, event)
if err != nil {
log.Print(err)
return
}
if _, err := l.LineBotClient.ReplyMessage(event.ReplyToken, message).WithContext(ctx).Do(); err != nil {
log.Print(err)
return
}
}
}