[#1223] lens/tui: Add writecache schema

Signed-off-by: Aleksey Savchuk <a.savchuk@yadro.com>

cmd/frostfs-lens/internal/schema/writecache/parsers.go

@@ -0,0 +1,63 @@
+package writecache
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"strings"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal/schema/common"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"github.com/mr-tron/base58"
+)
+
+var WritecacheParser = common.WithFallback(
+	DefaultBucketParser,
+	common.RawParser.ToFallbackParser(),
+)
+
+func DefaultBucketParser(key, value []byte) (common.SchemaEntry, common.Parser, error) {
+	if value != nil {
+		return nil, nil, errors.New("not a bucket")
+	}
+	if !bytes.Equal(key, []byte{0}) {
+		return nil, nil, errors.New("invalid key")
+	}
+	return &DefaultBucket{}, DefaultRecordParser, nil
+}
+
+func DefaultRecordParser(key, value []byte) (common.SchemaEntry, common.Parser, error) {
+	parts := strings.Split(string(key), "/")
+
+	if len(parts) != 2 {
+		return nil, nil, errors.New("invalid key, expected address string <CID>/<OID>")
+	}
+
+	cnrRaw, err := base58.Decode(parts[0])
+	if err != nil {
+		return nil, nil, errors.New("can't decode CID string")
+	}
+	objRaw, err := base58.Decode(parts[1])
+	if err != nil {
+		return nil, nil, errors.New("can't decode OID string")
+	}
+
+	cnr := cid.ID{}
+	if err := cnr.Decode(cnrRaw); err != nil {
+		return nil, nil, fmt.Errorf("can't decode CID: %w", err)
+	}
+	obj := oid.ID{}
+	if err := obj.Decode(objRaw); err != nil {
+		return nil, nil, fmt.Errorf("can't decode OID: %w", err)
+	}
+
+	var r DefaultRecord
+
+	r.addr.SetContainer(cnr)
+	r.addr.SetObject(obj)
+
+	r.data = value[:]
+
+	return &r, nil, nil
+}