<?php
/**
 * Piwik - free/libre analytics platform
 *
 * @link http://piwik.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 *
 */
namespace Piwik\Plugins\PrivacyManager;

use Piwik\Option;
use Piwik\Tracker\Cache;

/**
 * @property bool $doNotTrackEnabled    Enable / Disable Do Not Track {@see DoNotTrackHeaderChecker}
 * @property bool $ipAnonymizerEnabled  Enable / Disable IP Anonymizer {@see IPAnonymizer}
 * @property bool $useAnonymizedIpForVisitEnrichment Set this setting to 0 to let plugins use the full
 *                                      non-anonymized IP address when enriching visitor information.
 *                                      When set to 1, by default, Geo Location via geoip and Provider reverse name lookups
 *                                      will use the anonymized IP address when anonymization is enabled.
 * @property int  $ipAddressMaskLength  Anonymize a visitor's IP address after testing for "Ip exclude"
 *                                      This value is the level of anonymization Piwik will use; if the IP
 *                                      anonymization is deactivated, this value is ignored. For IPv4/IPv6 addresses,
 *                                      valid values are the number of octets in IP address to mask (from 0 to 4).
 *                                      For IPv6 addresses 0..4 means that 0, 64, 80, 104 or all bits are masked.
 */
class Config
{
    private $properties = array(
        'useAnonymizedIpForVisitEnrichment' => array('type' => 'boolean', 'default' => false),
        'ipAddressMaskLength'               => array('type' => 'integer', 'default' => 2),
        'doNotTrackEnabled'                 => array('type' => 'boolean', 'default' => true),
        'ipAnonymizerEnabled'               => array('type' => 'boolean', 'default' => true),
    );

    public function __set($name, $value)
    {
        if (!array_key_exists($name, $this->properties)) {
            throw new \Exception(sprintf('Property %s does not exist', $name));
        }

        $this->set($name, $value, $this->properties[$name]);
    }

    public function __get($name)
    {
        if (!array_key_exists($name, $this->properties)) {
            throw new \Exception(sprintf('Property %s does not exist', $name));
        }

        return $this->getFromTrackerCache($name, $this->properties[$name]);
    }

    private function prefix($optionName)
    {
        return 'PrivacyManager.' . $optionName;
    }

    private function getFromTrackerCache($name, $config)
    {
        $name  = $this->prefix($name);
        $cache = Cache::getCacheGeneral();

        if (array_key_exists($name, $cache)) {
            $value = $cache[$name];
            settype($value, $config['type']);

            return $value;
        }

        return $config['default'];
    }

    private function getFromOption($name, $config)
    {
        $name  = $this->prefix($name);
        $value = Option::get($name);

        if (false !== $value) {
            settype($value, $config['type']);
        } else {
            $value = $config['default'];
        }

        return $value;
    }

    private function set($name, $value, $config)
    {
        if ('boolean' == $config['type']) {
            $value = $value ? '1' : '0';
        } else {
            settype($value, $config['type']);
        }

        Option::set($this->prefix($name), $value);
        Cache::clearCacheGeneral();
    }

    public function setTrackerCacheGeneral($cacheContent)
    {
        foreach ($this->properties as $name => $config) {
            $cacheContent[$this->prefix($name)] = $this->getFromOption($name, $config);
        }

        return $cacheContent;
    }

}
