Implemented rudimentary notification with NTFY and acknowledgement

notification/factory.go

@@ -0,0 +1,15 @@
+package notification
+
+import (
+	// External
+	werr "git.gibonuddevalla.se/go/wrappederror"
+)
+
+func ServiceFactory(t string, config []byte, prio int, ackURL string) (Service, error) {
+	switch t {
+	case "NTFY":
+		return NewNTFY(config, prio, ackURL)
+	}
+
+	return nil, werr.New("Unknown notification service, '%s'", t).WithCode("002-0000")
+}

notification/ntfy.go

@@ -1,26 +1,70 @@
 package notification
 
 import (
+	// External
+	werr "git.gibonuddevalla.se/go/wrappederror"
+
 	// Standard
 	"bytes"
 	"encoding/json"
+	"fmt"
+	"io"
 	"net/http"
 )
 
 type NTFY struct {
-	URL string
+	URL            string
+	Prio           int
+	AcknowledgeURL string
 }
 
-func NewNTFY(config []byte) (instance NTFY, err error) {
+func NewNTFY(config []byte, prio int, ackURL string) (instance NTFY, err error) {
 	err = json.Unmarshal(config, &instance)
 	if err != nil {
-		return 
+		err = werr.Wrap(err).WithCode("002-0001").WithData(config)
+		return
 	}
+	instance.Prio = prio
+	instance.AcknowledgeURL = ackURL
 	return instance, nil
 }
 
-func (ntfy NTFY) Send(msg []byte) (err error) {
-	http.NewRequest("POST", ntfy.URL, bytes.NewReader(msg))
+func (ntfy NTFY) GetPrio() int {
+	return ntfy.Prio
+}
+
+func (ntfy NTFY) Send(uuid string, 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?uuid=%s", ntfy.AcknowledgeURL, uuid)
+	req.Header.Add("X-Actions", ackURL)
+
+	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
 }

notification/pkg.go

@@ -1,5 +1,59 @@
 package notification
 
-type Notification interface {
-	Send([]byte) error
+import (
+	// External
+	werr "git.gibonuddevalla.se/go/wrappederror"
+
+	// Standard
+	_ "fmt"
+	"slices"
+)
+
+type Service interface {
+	GetPrio() int
+	Send(string, []byte) error
+}
+
+type Manager struct {
+	services map[int][]Service
+}
+
+func NewManager() (nm Manager) {
+	nm.services = make(map[int][]Service, 32)
+	return
+}
+
+func (nm *Manager) AddService(userID int, service Service) {
+	var services []Service
+	var found bool
+	if services, found = nm.services[userID]; !found {
+		services = []Service{}
+	}
+
+	services = append(services, service)
+	slices.SortFunc(services, func(a, b Service) int {
+		if a.GetPrio() < b.GetPrio() {
+			return -1
+		}
+		if a.GetPrio() > b.GetPrio() {
+			return 1
+		}
+		return 0
+	})
+	nm.services[userID] = services
+}
+
+func (nm *Manager) Send(userID int, uuid string, msg []byte) (err error) {
+	services, found := nm.services[userID]
+	if !found {
+		return werr.New("No notification services defined for user ID %d", userID).WithCode("002-0008")
+	}
+
+	for _, service := range services {
+		if err = service.Send(uuid, msg); err == nil {
+			break
+		}
+	}
+
+	return
 }