fix(cmd): prevent sudden crash on download error

cmd/daemon/import.go

@@ -81,11 +81,8 @@ func buildImportCmd(parentCmd *cobra.Command) {
 
 		cmd.PrintLine()
 
-		importer.Download(
-			c.Context(),
-			&selected,
-			downloadProgressBar,
-		)
+		err = importer.Download(c.Context(), &selected, downloadProgressBar)
+		cmd.FatalErrorCheck(err)
 
 		cmd.PrintLine()
 		cmd.PrintLine()

cmd/gtk/startup_assistant.go

@@ -258,12 +258,8 @@ func startupAssistant(workingDir string, chainType genesis.ChainType) bool {
 									go func() {
 										log.Printf("start downloading...\n")
 
-										importer.Download(
-											ctx,
-											&md[snapshotIndex],
-											func(fileName string, totalSize, downloaded int64,
-												percentage float64,
-											) {
+										err := importer.Download(ctx, &md[snapshotIndex],
+											func(fileName string, totalSize, downloaded int64, percentage float64) {
 												percent := int(percentage)
 												glib.IdleAdd(func() {
 													dlMessage := fmt.Sprintf("🌐 Downloading %s | %d%% (%s / %s)",
@@ -278,6 +274,8 @@ func startupAssistant(workingDir string, chainType genesis.ChainType) bool {
 										)
 
 										glib.IdleAdd(func() {
+											fatalErrorCheck(err)
+
 											log.Printf("extracting data...\n")
 											ssPBLabel.SetText("   " + "📂 Extracting downloaded files...")
 											err := importer.ExtractAndStoreFiles()

cmd/importer.go

@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log"
 	"net/http"
 	"net/url"
 	"os"
@@ -23,7 +24,7 @@ const DefaultSnapshotURL = "https://snapshot.pactus.org"
 
 const maxDecompressedSize = 10 << 20 // 10 MB
 
-type DMStateFunc func(
+type ImporterStateFunc func(
 	fileName string,
 	totalSize, downloaded int64,
 	percentage float64,
@@ -124,47 +125,45 @@ func (i *Importer) GetMetadata(ctx context.Context) ([]Metadata, error) {
 	return metadata, nil
 }
 
-func (i *Importer) Download(
-	ctx context.Context,
-	metadata *Metadata,
-	stateFunc DMStateFunc,
-) {
-	done := make(chan struct{})
+func (i *Importer) Download(ctx context.Context, metadata *Metadata,
+	stateFunc ImporterStateFunc,
+) error {
+	done := make(chan error)
+	defer close((done))
+
 	dlLink, err := url.JoinPath(i.snapshotURL, metadata.Data.Path)
-	FatalErrorCheck(err)
+	if err != nil {
+		return err
+	}
 
 	fileName := filepath.Base(dlLink)
-
 	i.dataFileName = fileName
-
 	filePath := fmt.Sprintf("%s/%s", i.tempDir, fileName)
 
-	d := downloader.New(
-		dlLink,
-		filePath,
-		metadata.Data.Sha,
-	)
-
+	d := downloader.New(dlLink, filePath, metadata.Data.Sha)
 	d.Start(ctx)
 
 	go func() {
 		err := <-d.Errors()
-		FatalErrorCheck(err)
+		if err != nil {
+			log.Printf("download encountered an error: %s\n", err)
+			done <- err
+		}
 	}()
 
 	go func() {
 		for state := range d.Stats() {
 			stateFunc(fileName, state.TotalSize, state.Downloaded, state.Percent)
 			if state.Completed {
-				done <- struct{}{}
-				close(done)
+				log.Println("download completed")
+				done <- nil
 
 				return
 			}
 		}
 	}()
 
-	<-done
+	return <-done
 }
 
 func (i *Importer) Cleanup() error {

util/io.go

@@ -90,8 +90,7 @@ func IsDirEmpty(name string) bool {
 	return errors.Is(err, io.EOF)
 }
 
-// IsDirNotExistsOrEmpty returns true if a directory does not exist or is empty.
-// It checks if the path exists and, if so, whether the directory is empty.
+// IsDirNotExistsOrEmpty checks if the path exists and, if so, whether the directory is empty.
 func IsDirNotExistsOrEmpty(name string) bool {
 	if !PathExists(name) {
 		return true
@@ -203,11 +202,18 @@ func NewFixedReader(max int, buf []byte) *FixedReader {
 
 // MoveDirectory moves a directory from srcDir to dstDir, including all its contents.
 // If dstDir already exists and is not empty, it returns an error.
+// If the parent directory of dstDir does not exist, it will be created.
 func MoveDirectory(srcDir, dstDir string) error {
-	if !IsDirNotExistsOrEmpty(dstDir) {
+	if PathExists(dstDir) {
 		return fmt.Errorf("destination directory %s already exists", dstDir)
 	}
 
+	// Get the parent directory of the destination directory
+	parentDir := filepath.Dir(dstDir)
+	if err := Mkdir(parentDir); err != nil {
+		return fmt.Errorf("failed to create parent directories for %s: %w", dstDir, err)
+	}
+
 	if err := os.Rename(srcDir, dstDir); err != nil {
 		return fmt.Errorf("failed to move directory from %s to %s: %w", srcDir, dstDir, err)
 	}

util/io_test.go

@@ -12,6 +12,8 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+const invalidDirName = "/invalid:path/\x00*folder?\\CON"
+
 func TestWriteFile(t *testing.T) {
 	p := TempDirPath()
 	d := []byte("some-data")
@@ -90,56 +92,92 @@ func TestIsValidPath(t *testing.T) {
 		assert.False(t, IsValidDirPath("/root"))
 		assert.False(t, IsValidDirPath("/test"))
 	}
+	assert.False(t, IsValidDirPath(invalidDirName))
 	assert.False(t, IsValidDirPath("./io_test.go"))
 	assert.True(t, IsValidDirPath("/tmp"))
 	assert.True(t, IsValidDirPath("/tmp/pactus"))
 }
 
 func TestMoveDirectory(t *testing.T) {
-	// Create temporary directories
-	srcDir := TempDirPath()
-	dstDir := TempDirPath()
-	defer func() { _ = os.RemoveAll(srcDir) }()
-	defer func() { _ = os.RemoveAll(dstDir) }()
-
-	// Create a subdirectory in the source directory
-	subDir := filepath.Join(srcDir, "subdir")
-	err := Mkdir(subDir)
-	assert.NoError(t, err)
+	t.Run("DestinationDirectoryExistsAndNotEmpty", func(t *testing.T) {
+		srcDir := TempDirPath()
+		dstDir := TempDirPath()
 
-	// Create multiple files in the subdirectory
-	files := []struct {
-		name    string
-		content string
-	}{
-		{"file1.txt", "content 1"},
-		{"file2.txt", "content 2"},
-	}
+		err := MoveDirectory(srcDir, dstDir)
+		assert.Error(t, err)
+		assert.Contains(t, err.Error(), "destination directory")
+	})
 
-	for _, file := range files {
-		filePath := filepath.Join(subDir, file.name)
-		err = WriteFile(filePath, []byte(file.content))
+	t.Run("ParentDirectoryCreationFailure", func(t *testing.T) {
+		srcDir := TempDirPath()
+
+		err := MoveDirectory(srcDir, invalidDirName)
+		assert.Error(t, err)
+		assert.Contains(t, err.Error(), "failed to create parent directories")
+	})
+
+	t.Run("SourceDirectoryRenameFailure", func(t *testing.T) {
+		srcDir := TempDirPath()
+		dstDir := TempDirPath()
+
+		err := os.RemoveAll(dstDir)
 		assert.NoError(t, err)
-	}
 
-	// Move the directory
-	dstDirPath := filepath.Join(dstDir, "movedir")
-	err = MoveDirectory(srcDir, dstDirPath)
-	assert.NoError(t, err)
+		// Remove the source directory to simulate the rename failure
+		err = os.RemoveAll(srcDir)
+		assert.NoError(t, err)
 
-	// Assert the source directory no longer exists
-	assert.False(t, PathExists(srcDir))
+		err = MoveDirectory(srcDir, dstDir)
+		assert.Error(t, err)
+		assert.Contains(t, err.Error(), "failed to move directory")
+	})
 
-	// Assert the destination directory exists
-	assert.True(t, PathExists(dstDirPath))
+	t.Run("MoveDirectorySuccess", func(t *testing.T) {
+		// Create temporary directories
+		srcDir := TempDirPath()
+		dstDir := TempDirPath()
+		defer func() { _ = os.RemoveAll(srcDir) }()
+		defer func() { _ = os.RemoveAll(dstDir) }()
 
-	// Verify that all files have been moved and their contents are correct
-	for _, file := range files {
-		movedFilePath := filepath.Join(dstDirPath, "subdir", file.name)
-		data, err := ReadFile(movedFilePath)
+		// Create a subdirectory in the source directory
+		subDir := filepath.Join(srcDir, "subdir")
+		err := Mkdir(subDir)
 		assert.NoError(t, err)
-		assert.Equal(t, file.content, string(data))
-	}
+
+		// Create multiple files in the subdirectory
+		files := []struct {
+			name    string
+			content string
+		}{
+			{"file1.txt", "content 1"},
+			{"file2.txt", "content 2"},
+		}
+
+		for _, file := range files {
+			filePath := filepath.Join(subDir, file.name)
+			err = WriteFile(filePath, []byte(file.content))
+			assert.NoError(t, err)
+		}
+
+		// Move the directory
+		dstDirPath := filepath.Join(dstDir, "movedir")
+		err = MoveDirectory(srcDir, dstDirPath)
+		assert.NoError(t, err)
+
+		// Assert the source directory no longer exists
+		assert.False(t, PathExists(srcDir))
+
+		// Assert the destination directory exists
+		assert.True(t, PathExists(dstDirPath))
+
+		// Verify that all files have been moved and their contents are correct
+		for _, file := range files {
+			movedFilePath := filepath.Join(dstDirPath, "subdir", file.name)
+			data, err := ReadFile(movedFilePath)
+			assert.NoError(t, err)
+			assert.Equal(t, file.content, string(data))
+		}
+	})
 }
 
 func TestSanitizeArchivePath(t *testing.T) {