103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
package main
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import (
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"encoding/json"
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"errors"
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"fmt"
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v1 "github.com/retailcrm/mg-transport-api-client-go/v1"
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"log"
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"net/http"
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"os"
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"strconv"
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"time"
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)
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// H is a basic hashmap type.
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type H map[string]interface{}
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func main() {
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addr := os.Getenv("ADDR")
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if addr == "" {
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addr = ":8080"
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}
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log.Println("listening on", addr)
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mux := http.NewServeMux()
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mux.HandleFunc("/api/v1/webhook", HandleWebhook)
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err := http.ListenAndServe(addr, mux)
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if err != nil && !errors.Is(err, http.ErrServerClosed) {
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log.Fatalf("listen %s err: %s", addr, err)
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}
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}
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func HandleWebhook(rw http.ResponseWriter, req *http.Request) {
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// You should authenticate the request. Usually it's done by some sort of token header.
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var wh v1.WebhookRequest
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if err := readJSON(req, &wh); err != nil {
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serveError(rw, http.StatusBadRequest, err)
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return
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}
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switch wh.Type {
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case v1.MessageSendWebhookType:
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HandleSendWebhook(rw, wh.MessageWebhookData())
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case v1.MessageReadWebhookType:
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HandleReadWebhook(rw, wh.MessageWebhookData())
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case v1.MessageDeleteWebhookType:
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HandleDeleteWebhook(rw, wh.MessageWebhookData())
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case v1.TemplateCreateWebhookType:
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HandleTemplateCreate(rw, wh.TemplateCreateWebhookData())
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case v1.TemplateUpdateWebhookType:
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HandleTemplateUpdate(rw, wh.TemplateUpdateWebhookData())
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case v1.TemplateDeleteWebhookType:
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HandleTemplateDelete(rw, wh.TemplateDeleteWebhookData())
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default:
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serveError(rw, http.StatusUnprocessableEntity, fmt.Errorf("unknown webhook type: %s", wh.Type))
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}
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}
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func HandleSendWebhook(rw http.ResponseWriter, msg v1.MessageWebhookData) {
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log.Printf("incoming message: %#v", msg)
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serveJSON(rw, http.StatusOK, v1.NewSentMessageResponse(strconv.FormatInt(time.Now().UnixNano(), 10)))
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}
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func HandleReadWebhook(rw http.ResponseWriter, msg v1.MessageWebhookData) {
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log.Printf("incoming message read status: %#v", msg)
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serveJSON(rw, http.StatusOK, H{})
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}
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func HandleDeleteWebhook(rw http.ResponseWriter, msg v1.MessageWebhookData) {
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log.Printf("incoming message removal: %#v", msg)
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serveJSON(rw, http.StatusOK, H{})
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}
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func HandleTemplateCreate(rw http.ResponseWriter, tpl v1.TemplateCreateWebhookData) {
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log.Printf("new template: %#v", tpl)
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serveJSON(rw, http.StatusOK, H{})
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}
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func HandleTemplateUpdate(rw http.ResponseWriter, tpl v1.TemplateUpdateWebhookData) {
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log.Printf("updated template: %#v", tpl)
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serveJSON(rw, http.StatusOK, H{})
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}
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func HandleTemplateDelete(rw http.ResponseWriter, tpl v1.TemplateDeleteWebhookData) {
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log.Printf("template removal: %#v", tpl)
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serveJSON(rw, http.StatusOK, H{})
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}
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func readJSON(req *http.Request, out interface{}) error {
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defer func() { _ = req.Body.Close() }()
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return json.NewDecoder(req.Body).Decode(out)
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}
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func serveJSON(rw http.ResponseWriter, st int, data interface{}) {
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resp, _ := json.Marshal(data)
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rw.Header().Set("Content-Type", "application/json; charset=utf-8")
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rw.WriteHeader(st)
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_, _ = fmt.Fprintln(rw, string(resp))
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}
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func serveError(rw http.ResponseWriter, st int, err error) {
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serveJSON(rw, st, H{"error": err.Error()})
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}
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