error modals are so on

internal/handlers/errors.go

@@ -1,6 +1,7 @@
 package handlers
 
 import (
+	"encoding/json"
 	"fmt"
 	"net/http"
 
@@ -107,3 +108,50 @@ func throwNotFound(
 	err := errors.New("Resource not found")
 	throwError(s, w, r, http.StatusNotFound, msg, err, "debug")
 }
+
+// ErrorDetails contains structured error information for WebSocket error modals
+type ErrorDetails struct {
+	Code       int    `json:"code"`
+	Stacktrace string `json:"stacktrace"`
+}
+
+// formatErrorDetails extracts and formats error details from wrapped errors
+func formatErrorDetails(err error) string {
+	if err == nil {
+		return ""
+	}
+	// Use %+v format to get stack trace from github.com/pkg/errors
+	return fmt.Sprintf("%+v", err)
+}
+
+// SerializeErrorDetails creates a JSON string with code and stacktrace
+// This is exported so it can be used when creating error notifications
+func SerializeErrorDetails(code int, err error) string {
+	details := ErrorDetails{
+		Code:       code,
+		Stacktrace: formatErrorDetails(err),
+	}
+	jsonData, jsonErr := json.Marshal(details)
+	if jsonErr != nil {
+		// Fallback if JSON encoding fails
+		return fmt.Sprintf(`{"code":%d,"stacktrace":"Failed to serialize error"}`, code)
+	}
+	return string(jsonData)
+}
+
+// parseErrorDetails extracts code and stacktrace from JSON Details field
+// Returns (code, stacktrace). If parsing fails, returns (500, original details string)
+func parseErrorDetails(details string) (int, string) {
+	if details == "" {
+		return 500, ""
+	}
+
+	var errDetails ErrorDetails
+	err := json.Unmarshal([]byte(details), &errDetails)
+	if err != nil {
+		// Not JSON or malformed - treat as plain stacktrace with default code
+		return 500, details
+	}
+
+	return errDetails.Code, errDetails.Stacktrace
+}