Garmin inreach API support

garmin.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+type garminClient struct {
+	c      *http.Client
+	apiKey string
+}
+
+type garminMessageRequest struct {
+	Messages []garminMessage `json:"messages"`
+}
+
+type garminMessage struct {
+	Recipients []string `json:"recipients"`
+	Sender     string   `json:"sender"`
+	Timestamp  string   `json:"timestamp"`
+	Message    string   `json:"message"`
+}
+
+type garminMessageResponse struct {
+	Count int `json:"count"`
+}
+
+func newGarminClient(apiKey string) *garminClient {
+	return &garminClient{
+		c:      &http.Client{},
+		apiKey: apiKey,
+	}
+}
+
+func (gc *garminClient) sendMessage(imei, sender, msg string) error {
+	buf := &bytes.Buffer{}
+	err := json.NewEncoder(buf).Encode(garminMessageRequest{
+		Messages: []garminMessage{
+			{
+				Recipients: []string{imei},
+				Sender:     sender,
+				Timestamp:  time.Now().Format(time.RFC3339),
+				Message:    msg,
+			},
+		},
+	})
+
+	if err != nil {
+		return err
+	}
+
+	req, err := http.NewRequest("POST", "https://ipcinbound.inreachapp.com/IPC/IPCInboundApi/api/Messaging/Message", buf)
+	if err != nil {
+		return err
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("x-api-key", gc.apiKey)
+
+	resp, err := gc.c.Do(req)
+	if err != nil {
+		return err
+	}
+
+	defer resp.Body.Close()
+	body, _ := io.ReadAll(resp.Body)
+
+	if resp.StatusCode != 200 {
+		return fmt.Errorf("%s", string(body))
+	}
+
+	grResp := garminMessageResponse{}
+	err = json.NewDecoder(resp.Body).Decode(&grResp)
+	if err != nil {
+		return err
+	}
+
+	if grResp.Count != 1 {
+		return fmt.Errorf("expected 1 message, got %d", grResp.Count)
+	}
+
+	return nil
+}

main.go

@@ -10,12 +10,15 @@ import (
 )
 
 type PHandler struct {
-	tmpl *template.Template
+	tmpl         *template.Template
-	pd   *pdClient
+	pd           *pdClient
-	mux  *http.ServeMux
+	gc           *garminClient
+	garminIMEI   string
+	garminSender string
+	mux          *http.ServeMux
 }
 
-func NewPHandler(routingKey string) (*PHandler, error) {
+func NewPHandler(pdRoutingKey, garminApiKey, garminIMEI, garminSender string) (*PHandler, error) {
 	tmpl := template.New("index.html")
 
 	tmpl.Funcs(template.FuncMap{
@@ -28,9 +31,12 @@ func NewPHandler(routingKey string) (*PHandler, error) {
 	}
 
 	ph := &PHandler{
-		tmpl: tmpl,
+		tmpl:         tmpl,
-		pd:   newPDClient(routingKey),
+		pd:           newPDClient(pdRoutingKey),
-		mux:  http.NewServeMux(),
+		gc:           newGarminClient(garminApiKey),
+		garminIMEI:   garminIMEI,
+		garminSender: garminSender,
+		mux:          http.NewServeMux(),
 	}
 
 	ph.mux.HandleFunc("/{$}", ph.serveRoot)
@@ -62,7 +68,7 @@ func (ph *PHandler) serveRoot(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	err = ph.pd.sendAlert(m)
+	err = ph.sendAlert(m)
 	if err != nil {
 		sendError(w, http.StatusInternalServerError, "Error sending to PagerDuty: %s", err)
 		return
@@ -70,6 +76,20 @@ func (ph *PHandler) serveRoot(w http.ResponseWriter, r *http.Request) {
 	sendResponse(w, "Page sent")
 }
 
+func (ph *PHandler) sendAlert(m string) error {
+	err := ph.pd.sendAlert(m)
+	if err != nil {
+		return fmt.Errorf("Error sending to PagerDuty: %s", err)
+	}
+
+	err = ph.gc.sendMessage(ph.garminIMEI, ph.garminSender, m)
+	if err != nil {
+		return fmt.Errorf("Error sending to Garmin: %s", err)
+	}
+
+	return nil
+}
+
 var allowedEnvs = []string{
 	"SHORT_NAME",
 	"CONTACT_NAME",
@@ -94,12 +114,27 @@ func (ph *PHandler) envs() map[string]string {
 }
 
 func main() {
-	routingKey := os.Getenv("PD_ROUTING_KEY")
+	pdRoutingKey := os.Getenv("PD_ROUTING_KEY")
-	if routingKey == "" {
+	if pdRoutingKey == "" {
 		log.Fatalf("please set PD_ROUTING_KEY")
 	}
 
-	ph, err := NewPHandler(routingKey)
+	garminApiKey := os.Getenv("GARMIN_API_KEY")
+	if garminApiKey == "" {
+		log.Fatalf("please set GARMIN_API_KEY")
+	}
+
+	garminIMEI := os.Getenv("GARMIN_IMEI")
+	if garminIMEI == "" {
+		log.Fatalf("please set GARMIN_IMEI")
+	}
+
+	garminSender := os.Getenv("GARMIN_SENDER")
+	if garminSender == "" {
+		log.Fatalf("please set GARMIN_SENDER")
+	}
+
+	ph, err := NewPHandler(pdRoutingKey, garminApiKey, garminIMEI, garminSender)
 	if err != nil {
 		log.Fatalf("NewPHandler: %s", err)
 	}