stickers and terminal serialization (#57)

pkg/service/blockservice/blockservice.go

@@ -4,13 +4,16 @@
 package blockservice
 
 import (
+	"context"
 	"fmt"
 	"strings"
 	"time"
 
 	"github.com/wavetermdev/thenextwave/pkg/blockcontroller"
+	"github.com/wavetermdev/thenextwave/pkg/filestore"
 	"github.com/wavetermdev/thenextwave/pkg/tsgen/tsgenmeta"
 	"github.com/wavetermdev/thenextwave/pkg/wshutil"
+	"github.com/wavetermdev/thenextwave/pkg/wstore"
 )
 
 type BlockService struct{}
@@ -38,3 +41,24 @@ func (bs *BlockService) SendCommand(blockId string, cmd wshutil.BlockCommand) er
 	}
 	return nil
 }
+
+func (bs *BlockService) SaveTerminalState(ctx context.Context, blockId string, state string, stateType string, ptyOffset int64) error {
+	_, err := wstore.DBMustGet[*wstore.Block](ctx, blockId)
+	if err != nil {
+		return err
+	}
+	if stateType != "full" && stateType != "preview" {
+		return fmt.Errorf("invalid state type: %q", stateType)
+	}
+	// ignore MakeFile error (already exists is ok)
+	filestore.WFS.MakeFile(ctx, blockId, "cache:term:"+stateType, nil, filestore.FileOptsType{})
+	err = filestore.WFS.WriteFile(ctx, blockId, "cache:term:"+stateType, []byte(state))
+	if err != nil {
+		return fmt.Errorf("cannot save terminal state: %w", err)
+	}
+	err = filestore.WFS.WriteMeta(ctx, blockId, "cache:term:"+stateType, filestore.FileMeta{"ptyoffset": ptyOffset}, true)
+	if err != nil {
+		return fmt.Errorf("cannot save terminal state meta: %w", err)
+	}
+	return nil
+}