Implement single Picture Mode

1 files changed, 41 insertions, 8 deletions

diff --git a/src/camera.go b/src/camera.go
index 197aa21..cc29f54 100644
--- a/src/camera.go
+++ b/src/camera.go
@@ -3,7 +3,9 @@
 package main
 
 import (
-	"time"
+	"log"
+	"os/exec"
+	"io"
 )
 
 type Camera struct {
@@ -38,15 +40,46 @@ func NewCamera() Camera {
 	}
 }
 
-func runCameraHooks(last string, next string) {
-
+func runCameraHooks(last string, next string, m *Machine) {
 	if last == "idle" && next == "single_picture" {
-		// TODO implement launch of python subprocess here
-		go func() {
-			time.Sleep(1 * time.Second)
-			camera.statemachine.SendEvent("single_picture_taken")
-		}()
+		go singlePicture(m)
+	}
+}
+
+func singlePicture(m *Machine) {
+
+	// create command
+	var cmd *exec.Cmd
+	if !debug {
+		cmd = exec.Command("python3", "/usr/lib/python3.9/site-packages/birdscan/")
+	} else {
+		cmd = exec.Command("python3", "../python/birdscan", "--debug")
+	}
+
+	// connect stdout of python process
+	stdout,err := cmd.StdoutPipe()
+	if err != nil {
+		log.Print(err)
+	}
+	defer stdout.Close()
+
+	// run command
+	err = cmd.Start()
+	if err != nil {
+		log.Print(err)
 	}
+	data,err := io.ReadAll(stdout)
+	if err != nil {
+		log.Print(err)
+	}
+	err = cmd.Wait()  // wait until command execution and io is complete
+	if err != nil {
+		log.Print(err)
+	}
+
+	// process result
+	log.Println(string(data))
+	m.SendEvent("single_picture_taken")
 }
 
 func (cam *Camera) run() {