feat: downloader

internal/pkg/errcodes/errcodes.go

@@ -23,7 +23,89 @@ func (e *ErrorCode) Error() string {
 	return e.Message
 }
 
+// IsErr checks if the given error is an ErrorCode
+func IsErr(err error) bool {
+	_, ok := err.(*ErrorCode)
+	return ok
+}
+
+// AsErr converts error to ErrorCode if possible
+func AsErr(err error) (*ErrorCode, bool) {
+	if err == nil {
+		return nil, false
+	}
+	errcode, ok := err.(*ErrorCode)
+	return errcode, ok
+}
+
+// Join combines multiple errors into a single ErrorCode
+func Join(errs ...error) error {
+	if len(errs) == 0 {
+		return nil
+	}
+
+	var messages []string
+	var details []string
+
+	for _, err := range errs {
+		if err == nil {
+			continue
+		}
+
+		if errcode, ok := AsErr(err); ok {
+			messages = append(messages, errcode.Message)
+			if errcode.Details != "" {
+				details = append(details, errcode.Details)
+			}
+		} else {
+			messages = append(messages, err.Error())
+		}
+	}
+
+	if len(messages) == 0 {
+		return nil
+	}
+
+	// Use the first error's status code, or default to 500
+	statusCode := http.StatusInternalServerError
+	if len(errs) > 0 {
+		if errcode, ok := AsErr(errs[0]); ok {
+			statusCode = errcode.StatusCode
+		}
+	}
+
+	return New(statusCode, strings.Join(messages, "; "), details...)
+}
+
+// Wrap wraps an error with additional context
+func Wrap(err error, message string) error {
+	if err == nil {
+		return nil
+	}
+
+	if errcode, ok := AsErr(err); ok {
+		return New(errcode.StatusCode, message, errcode.Message, errcode.Details)
+	}
+
+	return New(http.StatusInternalServerError, message, err.Error())
+}
+
 var (
-	ErrNoDataset   = New(http.StatusNotFound, "no grib dataset found")
-	ErrOutOfBounds = New(http.StatusBadRequest, "requested time is out of bounds")
+	ErrNoDataset               = New(http.StatusNotFound, "no grib dataset found")
+	ErrOutOfBounds             = New(http.StatusBadRequest, "requested time is out of bounds")
+	ErrConfig                  = New(http.StatusInternalServerError, "configuration error")
+	ErrConfigInvalidEnv        = New(http.StatusInternalServerError, "invalid environment configuration")
+	ErrConfigMissingRequired   = New(http.StatusInternalServerError, "missing required configuration")
+	ErrRedis                   = New(http.StatusInternalServerError, "redis error")
+	ErrRedisLockAlreadyLocked  = New(http.StatusConflict, "could not perform redis lock", "already locked")
+	ErrRedisCacheMiss          = New(http.StatusNotFound, "cache miss", "key not found")
+	ErrRedisCacheCorrupted     = New(http.StatusInternalServerError, "cache data corrupted", "invalid format")
+	ErrDownload                = New(http.StatusInternalServerError, "download error")
+	ErrProcessing              = New(http.StatusInternalServerError, "data processing error")
+	ErrNoCubeFilesFound        = New(http.StatusNotFound, "no cube files found")
+	ErrNoValidCubeFilesFound   = New(http.StatusNotFound, "no valid cube files found")
+	ErrLatestCubeFileIsTooOld  = New(http.StatusNotFound, "latest cube file is too old")
+	ErrScheduler               = New(http.StatusInternalServerError, "scheduler error")
+	ErrSchedulerInvalidJob     = New(http.StatusBadRequest, "invalid job configuration")
+	ErrSchedulerTimeoutTooLong = New(http.StatusBadRequest, "job timeout too long", "timeout cannot exceed interval")
 )