smon/notification/ntfy.go

package notification

import (
	// External
	werr "git.gibonuddevalla.se/go/wrappederror"

	// Standard
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"net/http"
)

type NTFY struct {
	URL            string
	Prio           int
	AcknowledgeURL string
	logger         *slog.Logger
}

func NewNTFY(config []byte, prio int, ackURL string) (instance *NTFY, err error) {
	instance = new(NTFY)
	err = json.Unmarshal(config, &instance)
	if err != nil {
		err = werr.Wrap(err).WithCode("002-0001").WithData(config)
		return
	}
	instance.Prio = prio
	instance.AcknowledgeURL = ackURL
	return instance, nil
}

func (ntfy *NTFY) SetLogger(l *slog.Logger) {
	ntfy.logger = l
}

func (ntfy *NTFY) GetType() string {
	return "NTFY"
}

func (ntfy *NTFY) GetPrio() int {
	return ntfy.Prio
}

func (ntfy NTFY) Send(problemID int, msg []byte) (err error) {
	var req *http.Request
	var res *http.Response
	req, err = http.NewRequest("POST", ntfy.URL, bytes.NewReader(msg))
	if err != nil {
		err = werr.Wrap(err).WithCode("002-0002").WithData(ntfy.URL)
		return
	}

	ackURL := fmt.Sprintf("http, OK, %s/notification/ack?problemID=%d", ntfy.AcknowledgeURL, problemID)
	req.Header.Add("X-Actions", ackURL)
	req.Header.Add("X-Priority", "4") // XXX: should be 5
	req.Header.Add("X-Tags", "calendar")

	res, err = http.DefaultClient.Do(req)
	if err != nil {
		err = werr.Wrap(err).WithCode("002-0003")
		return
	}

	body, _ := io.ReadAll(res.Body)
	if res.StatusCode != 200 {
		err = werr.New("Invalid NTFY response").WithCode("002-0004").WithData(body)
		return
	}

	ntfyResp := struct {
		ID string
	}{}
	err = json.Unmarshal(body, &ntfyResp)
	if err != nil {
		err = werr.Wrap(err).WithCode("002-0005").WithData(body)
		return
	}

	return
}