feat: implement EncodeMsgpack and DecodeMsgpack for WebAppMetadata

metadata/web_app.go

@@ -1,7 +1,18 @@
 package metadata
 
+import (
+	"errors"
+	"git.lumeweb.com/LumeWeb/libs5-go/encoding"
+	"git.lumeweb.com/LumeWeb/libs5-go/serialize"
+	"git.lumeweb.com/LumeWeb/libs5-go/types"
+	"github.com/samber/lo"
+	"github.com/vmihailenco/msgpack/v5"
+	"sort"
+)
+
 var (
 	_ Metadata             = (*WebAppMetadata)(nil)
+	_ SerializableMetadata = (*WebAppMetadata)(nil)
 )
 
 type WebAppMetadata struct {
@@ -25,3 +36,103 @@ func NewWebAppMetadata(name string, tryFiles []string, extraMetadata ExtraMetada
 func NewEmptyWebAppMetadata() *WebAppMetadata {
 	return &WebAppMetadata{}
 }
+
+func (wm *WebAppMetadata) EncodeMsgpack(enc *msgpack.Encoder) error {
+	err := serialize.InitMarshaller(types.MetadataTypeWebApp, enc)
+	if err != nil {
+		return err
+	}
+
+	keys := lo.Keys[string, WebAppMetadataFileReference](wm.Paths)
+	sort.Strings(keys)
+
+	paths := make([]WebAppMetadataFileReference, len(wm.Paths))
+
+	for i, v := range keys {
+		paths[i] = wm.Paths[v]
+	}
+
+	items := make([]interface{}, 5)
+
+	items[0] = wm.Name
+	items[1] = wm.TryFiles
+	items[2] = wm.ErrorPages
+	items[3] = paths
+	items[4] = wm.ExtraMetadata
+
+	return enc.Encode(items)
+}
+
+func (wm *WebAppMetadata) DecodeMsgpack(dec *msgpack.Decoder) error {
+	err := serialize.InitUnmarshaller(types.MetadataTypeWebApp, dec)
+	if err != nil {
+		return err
+	}
+
+	val, err := dec.DecodeArrayLen()
+
+	if err != nil {
+		return err
+	}
+
+	if val != 5 {
+		return errors.New(" Corrupted metadata")
+	}
+
+	for i := 0; i < val; i++ {
+		switch i {
+		case 0:
+			wm.Name, err = dec.DecodeString()
+			if err != nil {
+				return err
+			}
+		case 1:
+			err = dec.Decode(&wm.TryFiles)
+			if err != nil {
+				return err
+			}
+		case 2:
+			err = dec.Decode(&wm.ErrorPages)
+			if err != nil {
+				return err
+			}
+		case 3:
+			paths, err := dec.DecodeSlice()
+			if err != nil {
+				return err
+			}
+
+			wm.Paths = make(map[string]WebAppMetadataFileReference, len(paths))
+
+			for _, v := range paths {
+				path := v.([]interface{})
+				parsedCid, err := encoding.CIDFromBytes(path[1].([]byte))
+				if err != nil {
+					return err
+				}
+				contentType := ""
+
+				if path[2] != nil {
+					contentType = path[2].(string)
+				}
+
+				wm.Paths[path[0].(string)] = WebAppMetadataFileReference{
+					Cid:         parsedCid,
+					ContentType: contentType,
+				}
+			}
+
+		case 4:
+			err = dec.Decode(&wm.ExtraMetadata)
+			if err != nil {
+				return err
+			}
+		default:
+			return errors.New(" Corrupted metadata")
+		}
+	}
+
+	wm.Type = "web_app"
+
+	return nil
+}