<?php

/**
 * A base class from which all classes which have configurable properties are
 * extended. Provides a generic setter with integrated validation.
 */
abstract class LoggerBase {

    // Various property types
    const PROP_TYPE_BOOLEAN = 'boolean';
    const PROP_TYPE_INTEGER = 'integer';
    const PROP_TYPE_NUMERIC = 'numeric';
    const PROP_TYPE_STRING = 'string';
    const PROP_TYPE_FILESIZE = 'filesize';
    const PROP_TYPE_LEVEL = 'level';

    /**
     * The main setter function, used for setting all properties.
     *
     * @return TRUE if the property was successfully set, FALSE if an error occured.
     */
    protected function set($property, $value, $type, $check = null)
    {
        if (!property_exists($this, $property)) {
            $this->warn("Property '$property' does not exist.");
            return false;
        }

        switch($type) {
            case self::PROP_TYPE_BOOLEAN:
                return $this->setBoolean($property, $value);

            case self::PROP_TYPE_INTEGER:
                return $this->setInteger($property, $value);

            case self::PROP_TYPE_NUMERIC:
                return $this->setNumeric($property, $value);

            case self::PROP_TYPE_STRING:
                return $this->setString($property, $value);

            default:
                $this->warn("No setter defined for property type [$type].");
                return false;
        }
    }

    /** Setter function for boolean type. */
    private function setBoolean($property, $value)
    {
        try {
            $this->$property = LoggerOptionConverter::toBooleanEx($value);
        } catch (Exception $ex) {
            $value = var_export($value, true);
            $propValue = var_export($this->$property, true);
            $this->warn("Invalid value given for '$property' property: [$value]. Expected a boolean value. Property not changed, current value: [$propValue].");
        }
    }

    /** Setter function for integer type. */
    private function setInteger($property, $value)
    {
        try {
            $this->$property = LoggerOptionConverter::toIntegerEx($value);
        } catch (Exception $ex) {
            $value = var_export($value, true);
            $propValue = var_export($this->$property, true);
            $this->warn("Invalid value given for '$property' property: [$value]. Expected an integer. Property not changed, current value: [$propValue].");
        }
    }

    /** Setter function for numeric type. */
    private function setNumeric($property, $value)
    {
        try {
            $this->$property = LoggerOptionConverter::toNumericEx($value);
        } catch (Exception $ex) {
            $value = var_export($value, true);
            $propValue = var_export($this->$property, true);
            $this->warn("Invalid value given for '$property' property: [$value]. Expected a number. Property not changed, current value: [$propValue].");
        }
    }

    /** Setter function for string type. */
    private function setString($property, $value)
    {
        try {
            $this->$property = LoggerOptionConverter::toStringEx($value);
        } catch (Exception $ex) {
            $value = var_export($value, true);
            $propValue = var_export($this->$property, true);
            $this->warn("Invalid value given for '$property' property: [$value]. Expected a string. Property not changed, current value: [$propValue].");
        }
    }

    /** Triggers a warning. */
    protected function warn($message)
    {
        $class = get_class($this);
        trigger_error("log4php: $class: $message", E_USER_WARNING);
    }
}



?>