vendor tsgo

tools/tsgo/internal/api/protocol_jsonrpc.go

@@ -0,0 +1,96 @@
+package api
+
+import (
+	"io"
+
+	"github.com/microsoft/typescript-go/internal/json"
+	"github.com/microsoft/typescript-go/internal/jsonrpc"
+)
+
+// JSONRPCProtocol implements the Protocol interface using JSON-RPC 2.0
+// with the LSP base protocol framing (Content-Length headers).
+type JSONRPCProtocol struct {
+	reader *jsonrpc.Reader
+	writer *jsonrpc.Writer
+}
+
+var _ Protocol = (*JSONRPCProtocol)(nil)
+
+// NewJSONRPCProtocol creates a new JSON-RPC protocol handler.
+func NewJSONRPCProtocol(rw io.ReadWriter) *JSONRPCProtocol {
+	return &JSONRPCProtocol{
+		reader: jsonrpc.NewReader(rw),
+		writer: jsonrpc.NewWriter(rw),
+	}
+}
+
+// ReadMessage implements Protocol.
+func (p *JSONRPCProtocol) ReadMessage() (*Message, error) {
+	data, err := p.reader.Read()
+	if err != nil {
+		return nil, err
+	}
+
+	var msg Message
+	if err := json.Unmarshal(data, &msg); err != nil {
+		return nil, err
+	}
+
+	return &msg, nil
+}
+
+// WriteRequest implements Protocol.
+func (p *JSONRPCProtocol) WriteRequest(id *jsonrpc.ID, method string, params any) error {
+	msg := jsonrpc.RequestMessage{
+		ID:     id,
+		Method: method,
+		Params: params,
+	}
+	data, err := json.Marshal(msg)
+	if err != nil {
+		return err
+	}
+	return p.writer.Write(data)
+}
+
+// WriteNotification implements Protocol.
+func (p *JSONRPCProtocol) WriteNotification(method string, params any) error {
+	msg := jsonrpc.RequestMessage{
+		Method: method,
+		Params: params,
+	}
+	data, err := json.Marshal(msg)
+	if err != nil {
+		return err
+	}
+	return p.writer.Write(data)
+}
+
+// WriteResponse implements Protocol.
+func (p *JSONRPCProtocol) WriteResponse(id *jsonrpc.ID, result any) error {
+	if result == nil {
+		result = json.Value("null")
+	}
+	msg := jsonrpc.ResponseMessage{
+		ID:     id,
+		Result: result,
+	}
+	data, err := json.Marshal(msg)
+	if err != nil {
+		return err
+	}
+	return p.writer.Write(data)
+}
+
+// WriteError implements Protocol.
+func (p *JSONRPCProtocol) WriteError(id *jsonrpc.ID, respErr *jsonrpc.ResponseError) error {
+	msg := jsonrpc.ResponseMessage{
+		ID:    id,
+		Error: respErr,
+	}
+	data, err := json.Marshal(msg)
+	if err != nil {
+		return err
+	}
+	return p.writer.Write(data)
+}