func GetUpdateAlertHandler()

in prometheus/handlers/handlers.go [180:216]

31 lines of code
7 McCabe index (conditional complexity)


func GetUpdateAlertHandler(client alert.PrometheusAlertClient) func(c echo.Context) error {
	return func(c echo.Context) error {
		defer glog.Flush()
		ruleName := c.Param(ruleNameParam)
		tenantID := c.Get(tenantIDParam).(string)
		glog.Infof("Update Rule: Tenant: %s, rule: %s", tenantID, ruleName)

		if ruleName == "" {
			return echo.NewHTTPError(http.StatusBadRequest, "No rule name provided")
		}

		if !client.RuleExists(tenantID, ruleName) {
			return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Rule '%s' does not exist", ruleName))
		}

		rule, err := decodeRulePostRequest(c)
		if err != nil {
			return echo.NewHTTPError(http.StatusBadRequest, err.Error())
		}

		err = alert.ValidateRule(rule)
		if err != nil {
			return echo.NewHTTPError(http.StatusBadRequest, err.Error())
		}

		err = client.UpdateRule(tenantID, rule)
		if err != nil {
			return echo.NewHTTPError(http.StatusInternalServerError, err.Error())
		}

		err = client.ReloadPrometheus()
		if err != nil {
			return echo.NewHTTPError(http.StatusInternalServerError, err.Error())
		}
		return c.NoContent(http.StatusNoContent)
	}
}