add mobile putaway web server with camera/upload capture

main.go

@@ -52,15 +52,12 @@ const spoolURLPrefix = "https://spooldb.com/s/"
 func main() {
 	verbose := flag.Bool("v", false, "verbose: log each event's start/end with timings to stderr")
 	dryRun := flag.Bool("n", false, "dry run: read and report, but do not write weight changes back to the site")
+	serveAddr := flag.String("serve", "", "run the mobile putaway web server at this address (e.g. :8080)")
 	flag.Usage = func() {
-		fmt.Fprintf(os.Stderr, "usage: %s [-v] [-n] <image>...\n", os.Args[0])
+		fmt.Fprintf(os.Stderr, "usage: %s [-v] [-n] [-serve addr] <image>...\n", os.Args[0])
 		flag.PrintDefaults()
 	}
 	flag.Parse()
-	if flag.NArg() < 1 {
-		flag.Usage()
-		os.Exit(2)
-	}
 
 	level := slog.LevelInfo
 	if *verbose {
@@ -77,6 +74,17 @@ func main() {
 	sp := &spoolSync{}
 	defer sp.close()
 
+	if *serveAddr != "" {
+		if err := serve(*serveAddr, auth, sp, *dryRun); err != nil {
+			fail("serve: %v", err)
+		}
+		return
+	}
+
+	if flag.NArg() < 1 {
+		flag.Usage()
+		os.Exit(2)
+	}
 	results := make([]result, 0, flag.NArg())
 	for _, path := range flag.Args() {
 		results = append(results, processImage(path, auth, sp, *dryRun))
@@ -163,14 +171,18 @@ func (s *spoolSync) close() {
 // processImage reads one photo, capturing any failure in the result's Error
 // field so a single bad image doesn't abort the whole batch.
 func processImage(path string, auth claude.Auth, sp *spoolSync, dryRun bool) result {
-	defer trace("image " + path)()
-	r := result{Image: path}
-
 	img, err := loadImage(path)
 	if err != nil {
-		r.Error = fmt.Sprintf("load image: %v", err)
-		return r
+		return result{Image: path, Error: fmt.Sprintf("load image: %v", err)}
 	}
+	return processImg(img, path, auth, sp, dryRun)
+}
+
+// processImg runs the QR + weight + spooldb logic on a decoded image. name is
+// just a label for the output (a file path or upload filename).
+func processImg(img image.Image, name string, auth claude.Auth, sp *spoolSync, dryRun bool) result {
+	defer trace("image " + name)()
+	r := result{Image: name}
 
 	url, err := decodeQR(img)
 	if err != nil {