start work on media storage

storage/mediaProvider/mediaProvider.go

@@ -1,3 +1,24 @@
 package mediaprovider
 
+import "io"
+
 // TODO: Implement me
+
+type FileProvider interface {
+	// Return the filepath (including name) to every file in the given folder
+	ListFiles(folder string) (filePaths []string)
+	// Check whether a given filepath exists
+	HasFile(filePath string) (ok bool)
+	// Read the content of a file
+	ReadFile(filePath string) (data io.Reader, err error)
+	// Write the given data to a file.
+	// If it exists, overwrite it
+	// It it doesn't exist, create it
+	WriteFile(filePath string, data io.Reader) (err error)
+	// Delete a given file. If it doesn't exist, do nothing
+	DeleteFile(filePath string)
+}
+
+type MediaStorage struct {
+	provider FileProvider
+}

storage/mediaProvider/preprocessor.go

@@ -0,0 +1,36 @@
+package mediaprovider
+
+import (
+	"io"
+	"strings"
+
+	"github.com/gabriel-vasile/mimetype"
+)
+
+func Compress(dataReader io.Reader, mimeType *string) (io.Reader, error) {
+	data, err := io.ReadAll(dataReader)
+	if err != nil {
+		return nil, err
+	}
+	if mimeType == nil {
+		*mimeType = mimetype.Detect(data).String()
+	}
+	uberType, subType, _ := strings.Cut(*mimeType, "/")
+	var dataOut []byte
+	switch uberType {
+	case "text":
+	case "application":
+	case "image":
+	case "video":
+		dataOut, err = compressVideo(data, subType)
+	case "audio":
+	case "font":
+	default:
+	}
+	return nil, nil
+}
+
+func compressVideo(dataIn []byte, subType string) (dataOut []byte, err error) {
+	// TODO: Implement me
+	panic("Implement me")
+}