feat(upload): add first prototype of File storage, svg database and svg processing. Also added --help command

pkg/svg/storage.go

@@ -0,0 +1,50 @@
+package svg
+
+import (
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+)
+
+type SvgStorage interface {
+	Create(id string, svg io.Reader) (string, error)
+	Get(id string) (io.Reader, error)
+}
+
+type FileSvgStorage struct {
+	basepath string
+}
+
+func NewFileStorage(path string) *FileSvgStorage {
+	err := os.MkdirAll(path, 0755)
+	if err != nil {
+		panic(err)
+	}
+	return &FileSvgStorage{path}
+}
+
+func (f FileSvgStorage) Create(id string, svg io.Reader) (string, error) {
+	file, err := os.Create(filepath.Join(f.basepath, id+".svg"))
+
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	_, err = io.Copy(file, svg)
+	if err != nil {
+		return "", err
+	}
+
+	log.Println("Created File: ", file.Name())
+	return file.Name(), nil
+}
+
+func (f FileSvgStorage) Get(id string) (io.Reader, error) {
+	file, err := os.Open(filepath.Join(f.basepath, "svg", id+".svg"))
+	if err != nil {
+		return nil, err
+	}
+	return file, nil
+}