1 files changed, 125 insertions, 0 deletions
diff --git a/pkg/upload/upload.go b/pkg/upload/upload.go
new file mode 100644
index 0000000..aff7803
--- /dev/null
+++ b/pkg/upload/upload.go
@@ -0,0 +1,125 @@
+package upload
+
+import (
+	"archive/zip"
+	"fmt"
+	"io"
+	"mime/multipart"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"github.com/LMBishop/scrapbook/pkg/index"
+)
+
+func HandleUpload(siteName string, reader *multipart.Reader, index *index.SiteIndex) (string, error) {
+	s := index.GetSite(siteName)
+	if s == nil {
+		return "", fmt.Errorf("no such site: %s", siteName)
+	}
+
+	temp, err := os.CreateTemp(os.TempDir(), "scrapbook")
+	if err != nil {
+		return "", fmt.Errorf("failed to create temporary file: %w", err)
+	}
+	defer func() {
+		temp.Close()
+		os.Remove(temp.Name())
+	}()
+
+	for {
+		part, err := reader.NextPart()
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			return "", fmt.Errorf("failed to read multipart stream: %w", err)
+		}
+		if part.FormName() == "upload" {
+			io.Copy(temp, part)
+		}
+	}
+
+	zipReader, err := zip.OpenReader(temp.Name())
+	if err != nil {
+		return "", fmt.Errorf("failed to open zip reader: %w", err)
+	}
+	defer zipReader.Close()
+
+	version, err := s.CreateNewVersion()
+	if err != nil {
+		return "", fmt.Errorf("failed to create new version: %w", err)
+	}
+	versionDir := path.Join(s.Path, version)
+
+	err = unzipSource(temp.Name(), versionDir)
+	if err != nil {
+		return "", fmt.Errorf("failed to unzip archive: %w", err)
+	}
+
+	err = s.UpdateVersion(version)
+	if err != nil {
+		return "", fmt.Errorf("failed to update version: %w", err)
+	}
+
+	return version, nil
+}
+
+// https://gosamples.dev/unzip-file/
+
+func unzipSource(source, destination string) error {
+	reader, err := zip.OpenReader(source)
+	if err != nil {
+		return err
+	}
+	defer reader.Close()
+
+	destination, err = filepath.Abs(destination)
+	if err != nil {
+		return err
+	}
+
+	for _, f := range reader.File {
+		err := unzipFile(f, destination)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func unzipFile(f *zip.File, destination string) error {
+	filePath := filepath.Join(destination, f.Name)
+	if !strings.HasPrefix(filePath, filepath.Clean(destination)+string(os.PathSeparator)) {
+		return fmt.Errorf("invalid file path: %s", filePath)
+	}
+
+	if f.FileInfo().IsDir() {
+		if err := os.MkdirAll(filePath, os.ModePerm); err != nil {
+			return err
+		}
+		return nil
+	}
+
+	if err := os.MkdirAll(filepath.Dir(filePath), os.ModePerm); err != nil {
+		return err
+	}
+
+	destinationFile, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
+	if err != nil {
+		return err
+	}
+	defer destinationFile.Close()
+
+	zippedFile, err := f.Open()
+	if err != nil {
+		return err
+	}
+	defer zippedFile.Close()
+
+	if _, err := io.Copy(destinationFile, zippedFile); err != nil {
+		return err
+	}
+	return nil
+}