Reworked error handling

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"os/exec"
@@ -154,11 +155,7 @@ func startProcessing() {
 		g.Update()
 
 		if anime.HasSubtitlesStream && outputFormat != "mkv" {
-			animeList[index].Status = Error
-			gui.ButtonLabel = "Start"
-			processing = false
-			logMessage("File "+anime.Name+" contains subtitles stream, output format must be MKV", false)
-			g.Update()
+			handleStartUpscalingError("", index, "File "+anime.Name+" contains subtitles stream, output format must be MKV", errors.New(""))
 			return
 		}
 
@@ -167,11 +164,7 @@ func startProcessing() {
 
 		workingDirectory, err := os.Getwd()
 		if err != nil {
-			animeList[index].Status = Error
-			gui.ButtonLabel = "Start"
-			processing = false
-			g.Update()
-			handleSoftError("Getting working directory error:", err.Error())
+			handleStartUpscalingError("", index, "Getting working directory error:", err)
 			return
 		}
 
@@ -189,41 +182,26 @@ func startProcessing() {
 
 		stderr, err := cmd.StderrPipe()
 		if err != nil {
-			os.Remove(outputPath)
-			animeList[index].Status = Error
-			gui.ButtonLabel = "Start"
-			processing = false
-			g.Update()
-			handleSoftError("Creating pipe error:", err.Error())
+			handleStartUpscalingError(outputPath, index, "Creating pipe error:", err)
 			return
 		}
 
 		err = cmd.Start()
 		if err != nil {
-			os.Remove(outputPath)
-			animeList[index].Status = Error
-			gui.ButtonLabel = "Start"
-			processing = false
-			g.Update()
-			handleSoftError("Starting ffmpeg process error:", err.Error())
+			handleStartUpscalingError(outputPath, index, "Starting ffmpeg process error:", err)
 			return
 		}
 
 		ffmpegLogs := handleUpscalingLogs(stderr, anime)
 
 		err = cmd.Wait()
 		if err != nil {
-			os.Remove(outputPath)
 			if cancelled {
 				cancelled = false
 				return
 			}
 
-			animeList[index].Status = Error
-			gui.ButtonLabel = "Start"
-			processing = false
-			g.Update()
-			handleSoftError("FFMPEG Error:", err.Error())
+			handleStartUpscalingError(outputPath, index, "FFMPEG Error:", err)
 			handleSoftError("FFMPEG logs:", ffmpegLogs)
 			return
 		}

utils.go

@@ -119,3 +119,21 @@ func check(err error) {
 		log.Fatal(err)
 	}
 }
+
+func handleStartUpscalingError(outputPath string, animeIndex int, errorMessage string, err error) {
+	if outputPath != "" {
+		os.Remove(outputPath)
+	}
+
+	animeList[animeIndex].Status = Error
+	gui.ButtonLabel = "Start"
+	processing = false
+	g.Update()
+
+	if err.Error() != "" {
+		handleSoftError(errorMessage, err.Error())
+		return
+	}
+
+	logMessage("File "+animeList[animeIndex].Name+" contains subtitles stream, output format must be MKV", false)
+}