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<?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\CustomVariables;
use Piwik\Common;
use Piwik\DataTable;
use Piwik\Db;
use Piwik\Log;
class Model
{
const DEFAULT_CUSTOM_VAR_COUNT = 5;
const SCOPE_PAGE = 'page';
const SCOPE_VISIT = 'visit';
const SCOPE_CONVERSION = 'conversion';
private $scope = null;
private $table = null;
public function __construct($scope)
{
if (empty($scope) || !in_array($scope, $this->getScopes())) {
throw new \Exception('Invalid custom variable scope');
}
$this->scope = $scope;
$this->table = Common::prefixTable($this->getTableNameFromScope($scope));
}
private function getTableNameFromScope($scope)
{
// actually we should have a class for each scope but don't want to overengineer it for now
switch ($scope) {
case self::SCOPE_PAGE:
return 'log_link_visit_action';
case self::SCOPE_VISIT:
return 'log_visit';
case self::SCOPE_CONVERSION:
return 'log_conversion';
}
}
public function getScopeName()
{
return ucfirst($this->scope);
}
/**
* @see getHighestCustomVarIndex()
* @return int
*/
public function getCurrentNumCustomVars()
{
$indexes = $this->getCustomVarIndexes();
return count($indexes);
}
/**
* result of getHighestCustomVarIndex() can be different to getCurrentNumCustomVars() in case there are some missing
* custom variable indexes. For instance in case of manual changes on the DB
*
* custom_var_v1
* custom_var_v2
* custom_var_v4
*
* getHighestCustomVarIndex() -> returns 4
* getCurrentNumCustomVars() -> returns 3
*
* @return int
*/
public function getHighestCustomVarIndex()
{
$indexes = $this->getCustomVarIndexes();
if (empty($indexes)) {
return 0;
}
return max($indexes);
}
public function getCustomVarIndexes()
{
$columns = $this->getCustomVarColumnNames();
if (empty($columns)) {
return array();
}
$indexes = array_map(function ($column) {
return Model::getCustomVariableIndexFromFieldName($column);
}, $columns);
return array_values(array_unique($indexes));
}
private function getCustomVarColumnNames()
{
$columns = Db::getColumnNamesFromTable($this->table);
$customVarColumns = array_filter($columns, function ($column) {
return false !== strpos($column, 'custom_var_');
});
return $customVarColumns;
}
public function removeCustomVariable()
{
$index = $this->getHighestCustomVarIndex();
if ($index < 1) {
return null;
}
Db::exec(sprintf('ALTER TABLE %s ', $this->table)
. sprintf('DROP COLUMN custom_var_k%d,', $index)
. sprintf('DROP COLUMN custom_var_v%d;', $index));
return $index;
}
public function addCustomVariable()
{
$index = $this->getHighestCustomVarIndex() + 1;
$maxLen = CustomVariables::getMaxLengthCustomVariables();
Db::exec(sprintf('ALTER TABLE %s ', $this->table)
. sprintf('ADD COLUMN custom_var_k%d VARCHAR(%d) DEFAULT NULL,', $index, $maxLen)
. sprintf('ADD COLUMN custom_var_v%d VARCHAR(%d) DEFAULT NULL;', $index, $maxLen));
return $index;
}
public static function getCustomVariableIndexFromFieldName($fieldName)
{
$onlyNumber = str_replace(array('custom_var_k', 'custom_var_v'), '', $fieldName);
if (is_numeric($onlyNumber)) {
return (int) $onlyNumber;
}
}
public static function getScopes()
{
return array(self::SCOPE_PAGE, self::SCOPE_VISIT, self::SCOPE_CONVERSION);
}
public static function install()
{
foreach (self::getScopes() as $scope) {
$model = new Model($scope);
try {
$maxCustomVars = self::DEFAULT_CUSTOM_VAR_COUNT;
$customVarsToAdd = $maxCustomVars - $model->getCurrentNumCustomVars();
for ($index = 0; $index < $customVarsToAdd; $index++) {
$model->addCustomVariable();
}
} catch (\Exception $e) {
Log::error('Failed to add custom variable: ' . $e->getMessage());
}
}
}
public static function uninstall()
{
foreach (self::getScopes() as $scope) {
$model = new Model($scope);
while ($model->getHighestCustomVarIndex()) {
$model->removeCustomVariable();
}
}
}
}
|
