SUSE/saptune

package txtparser

import (
    "github.com/SUSE/saptune/system"
    "strconv"
)

// currently not used functions, for future use

// CalculateOptimumValue calculates optimum parameter value given the current
// value, comparison operator, and expected value. Return optimised value.
func CalculateOptimumValue(operator Operator, currentValue string, expectedValue string) (string, error) {
    if operator == OperatorEqual {
        return expectedValue, nil
    }
    // Numeric comparisons
    var iCurrentValue int64
    iExpectedValue, err := strconv.ParseInt(expectedValue, 10, 64)
    if err != nil {
        return "", system.ErrorLog("%+v - Expected value \"%s\" should be but is not an integer", err, expectedValue)
    }
    if currentValue == "" {
        switch operator {
        case OperatorLessThan:
            iCurrentValue = iExpectedValue - 1
        case OperatorLessThanEqual:
            iCurrentValue = iExpectedValue
        case OperatorMoreThan:
            iCurrentValue = iExpectedValue + 1
        case OperatorMoreThanEqual:
            iCurrentValue = iExpectedValue
        }
    } else {
        iCurrentValue, err = strconv.ParseInt(currentValue, 10, 64)
        if err != nil {
            return "", system.ErrorLog("%+v - Current value \"%s\" should be but is not an integer", err, currentValue)
        }
        switch operator {
        case OperatorLessThan:
            if iCurrentValue >= iExpectedValue {
                iCurrentValue = iExpectedValue - 1
            }
        case OperatorMoreThan:
            if iCurrentValue <= iExpectedValue {
                iCurrentValue = iExpectedValue + 1
            }
        case OperatorLessThanEqual:
            if iCurrentValue >= iExpectedValue {
                iCurrentValue = iExpectedValue
            }
        case OperatorMoreThanEqual:
            if iCurrentValue <= iExpectedValue {
                iCurrentValue = iExpectedValue
            }
        }
    }
    return strconv.FormatInt(iCurrentValue, 10), nil
}