Preserve file extension

go.mod

@@ -4,4 +4,7 @@ go 1.24.3
 
 require github.com/fsnotify/fsnotify v1.9.0
 
-require golang.org/x/sys v0.13.0 // indirect
+require (
+	github.com/adrg/xdg v0.5.3
+	golang.org/x/sys v0.26.0 // indirect
+)

go.sum

@@ -1,4 +1,14 @@
+github.com/adrg/xdg v0.5.3 h1:xRnxJXne7+oWDatRhR1JLnvuccuIeCoBu2rtuLqQB78=
+github.com/adrg/xdg v0.5.3/go.mod h1:nlTsY+NNiCBGCK2tpm09vRqfVzrc2fLmXGpBLF0zlTQ=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
 github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
-golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
-golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -2,7 +2,9 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"io/fs"
 	"log"
 	"os"
 	"os/signal"
@@ -12,6 +14,7 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/adrg/xdg"
 	"github.com/fsnotify/fsnotify"
 )
 
@@ -22,6 +25,11 @@ func main() {
 	destDir := "/home/av/temp/dest"
 	os.MkdirAll(destDir, 0755)
 
+	counterFile, err := xdg.DataFile("filemover/counter")
+	if err != nil {
+		log.Fatalf("Application data dir not accessible, %v", err)
+	}
+
 	// Контекст для graceful shutdown
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
@@ -36,20 +44,20 @@ func main() {
 	// Запуск единственного обработчика
 	go func() {
 		defer wg.Done()
-		counter := loadCounter(destDir)
+		counter := loadCounter(counterFile)
 		for {
 			select {
 			case file, ok := <-tasks:
 				if !ok {
 					// Канал закрыт, завершаем работу
-					saveCounter(destDir, counter)
+					saveCounter(counterFile, counter)
 					log.Println("Worker stopped")
 					return
 				}
-				processFile(file, destDir, &counter)
+				processFile(file, destDir, counterFile, &counter)
 			case <-ctx.Done():
 				// Получен сигнал завершения
-				saveCounter(destDir, counter)
+				saveCounter(counterFile, counter)
 				log.Println("Worker stopped by context")
 				return
 			}
@@ -117,7 +125,7 @@ mainLoop:
 	log.Println("Shutdown complete")
 }
 
-func processFile(filePath, destDir string, counter *int) {
+func processFile(filePath, destDir, counterPath string, counter *int) {
 	// Проверка что это файл
 	info, err := os.Stat(filePath)
 	if err != nil {
@@ -131,22 +139,45 @@ func processFile(filePath, destDir string, counter *int) {
 	// Ожидание завершения записи
 	time.Sleep(500 * time.Millisecond)
 
-	// Копирование
-	newName := fmt.Sprintf("%03d", *counter)
-	destPath := filepath.Join(destDir, newName)
-	if err := os.Rename(filePath, destPath); err != nil {
-		log.Printf("Moving failed: %v", err)
-		return
-	}
+	moveAttempt := 0
 
-	// Обновление счетчика
-	*counter++
-	saveCounter(destDir, *counter)
-	log.Printf("Moved: %s -> %s", filePath, destPath)
+	for {
+		if moveAttempt > 100 {
+			log.Printf("Moving failed after %d attempts, see messages", moveAttempt)
+			break
+		}
+
+		*counter++
+		saveCounter(counterPath, *counter)
+
+		newName := fmt.Sprintf("%05d%s", *counter, filepath.Ext(filePath))
+		destPath := filepath.Join(destDir, newName)
+
+		_, err := os.Stat(destPath)
+		if err == nil {
+			log.Printf("Moving failed, file already exists: %s", destPath)
+			moveAttempt++
+			continue
+		}
+
+		if !errors.Is(err, fs.ErrNotExist) {
+			log.Printf("Moving failed: %v", err)
+			moveAttempt++
+			continue
+		}
+
+		if err := os.Rename(filePath, destPath); err != nil {
+			log.Printf("Moving failed: %v", err)
+			moveAttempt++
+			continue
+		}
+
+		log.Printf("Moved: %s -> %s", filePath, destPath)
+		break
+	}
 }
 
-func loadCounter(dir string) int {
-	counterPath := filepath.Join(dir, "counter.txt")
+func loadCounter(counterPath string) int {
 	data, err := os.ReadFile(counterPath)
 	if err != nil {
 		if !os.IsNotExist(err) {
@@ -162,8 +193,7 @@ func loadCounter(dir string) int {
 	return count
 }
 
-func saveCounter(dir string, count int) {
-	counterPath := filepath.Join(dir, "counter.txt")
+func saveCounter(counterPath string, count int) {
 	if err := os.WriteFile(counterPath, []byte(strconv.Itoa(count)), 0644); err != nil {
 		log.Printf("Failed to save counter: %v", err)
 	}