start work on media storage

go.mod

@@ -47,6 +47,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.5 // indirect
 	github.com/glebarez/go-sqlite v1.21.2 // indirect
 	github.com/go-test/deep v1.1.1 // indirect
 	github.com/go-webauthn/x v0.1.14 // indirect
@@ -69,6 +70,7 @@ require (
 	github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/net v0.27.0 // indirect
 	golang.org/x/sys v0.23.0 // indirect
 	golang.org/x/text v0.17.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

go.sum

@@ -85,6 +85,8 @@ github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1m
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fxamacker/cbor/v2 v2.7.0 h1:iM5WgngdRBanHcxugY4JySA0nk1wZorNOpTgCMedv5E=
 github.com/fxamacker/cbor/v2 v2.7.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXEeXQVeNoDQ=
+github.com/gabriel-vasile/mimetype v1.4.5 h1:J7wGKdGu33ocBOhGy0z653k/lFKLFDPJMG8Gql0kxn4=
+github.com/gabriel-vasile/mimetype v1.4.5/go.mod h1:ibHel+/kbxn9x2407k1izTA1S81ku1z/DlgOW2QE0M4=
 github.com/glebarez/go-sqlite v1.21.2 h1:3a6LFC4sKahUunAmynQKLZceZCOzUthkRkEAl9gAXWo=
 github.com/glebarez/go-sqlite v1.21.2/go.mod h1:sfxdZyhQjTM2Wry3gVYWaW072Ri1WMdWJi0k6+3382k=
 github.com/glebarez/sqlite v1.11.0 h1:wSG0irqzP6VurnMEpFGer5Li19RpIRi2qvQz++w0GMw=
@@ -376,6 +378,8 @@ golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96b
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
+golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
+golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=

storage/mediaFile.go

@@ -18,7 +18,7 @@ type MediaMetadata struct {
 	// If not null, this entry is marked as deleted
 	DeletedAt gorm.DeletedAt `gorm:"index"`
 	Remote    bool           // whether the attachment is a remote one
-	// Where the media is stored. Url if remote file,
+	// Where the media is stored. Url if remote file, file path if local
 	Location string
 	Type     string // What media type this is following mime types, eg image/png
 	// Descriptive name for a media file

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")
+}