Implement RPC

rpc/error.go

@@ -0,0 +1,41 @@
+package rpc
+
+import (
+	"context"
+	"encoding/json"
+	"log/slog"
+
+	"nhooyr.io/websocket"
+)
+
+func respondError(ctx context.Context, c *websocket.Conn, id string, code int64, err error, data any) {
+	slog.ErrorContext(ctx, "Responding to Websocket Request With Error", "err", err, "id", id, "code", code, "data", data)
+	rData := []byte{}
+	if data != nil {
+		rData, err = json.Marshal(data)
+		if err != nil {
+			slog.ErrorContext(ctx, "Error Marshalling Error Data", "err", err)
+			return
+		}
+	}
+
+	raw := json.RawMessage(rData)
+
+	resp, err := json.Marshal(Response{
+		ID: id,
+		Error: &Error{
+			Code:    code,
+			Message: err.Error(),
+			Data:    &raw,
+		},
+	})
+	if err != nil {
+		slog.ErrorContext(ctx, "Error Marshalling Error Response", "err", err)
+		return
+	}
+	err = c.Write(ctx, websocket.MessageText, resp)
+	if err != nil {
+		slog.ErrorContext(ctx, "Error Sending Error Response", "err", err)
+		return
+	}
+}