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<?php
namespace Bitrix\Conversion;
use Bitrix\Main\DB;
use Bitrix\Main\Type\Date;
use Bitrix\Main\SystemException;
use Bitrix\Main\ArgumentTypeException;
/** @internal */
class Context
{
const EMPTY_CONTEXT_ID = 0; // Context with no attributes.
protected $id = null;
protected $attributes = array();
/** Add value to counter. If counter not exists set counter to value. Save to database.
* @param Date $day - counter date
* @param string $name - counter name
* @param int|float $value - number to add
* @throws ArgumentTypeException
* @throws SystemException
*/
public function addCounter(Date $day, $name, $value)
{
if (! is_string($name))
throw new ArgumentTypeException('name', 'string');
if (! is_numeric($value))
throw new ArgumentTypeException('value', 'numeric');
if (($id = $this->id) === null)
throw new SystemException('Cannot add counter without context!');
// save to database
$primary = array(
'DAY' => $day,
'CONTEXT_ID' => $id,
'NAME' => $name
);
$data = array('VALUE' => new DB\SqlExpression('?# + ?f', 'VALUE', $value));
$result = Internals\ContextCounterDayTable::update($primary, $data);
if ($result->getAffectedRowsCount() === 0)
{
try
{
$result = Internals\ContextCounterDayTable::add($primary + array('VALUE' => $value));
}
catch (DB\SqlQueryException $e)
{
$result = Internals\ContextCounterDayTable::update($primary, $data);
}
}
$result->isSuccess(); // TODO isSuccess
}
/** Set attribute with value.
* @param string $name - attribute name
* @param string|int|float|null $value - attribute value
* @throws ArgumentTypeException
* @throws SystemException
*/
public function setAttribute($name, $value = null)
{
if (! is_string($name))
throw new ArgumentTypeException('name', 'string');
if (! (is_scalar($value) || is_null($value)))
throw new ArgumentTypeException('name', 'scalar');
if ($this->id !== null)
throw new SystemException('Cannot set attribute for existent context!');
$this->attributes[$name.':'.$value] = array('NAME' => $name, 'VALUE' => $value);
}
/** Save context & attributes to database */
protected function save()
{
if (($id =& $this->id) !== null)
throw new SystemException('Cannot save existent context!');
// save to database
$id = self::EMPTY_CONTEXT_ID;
if ($attributes = $this->attributes)
{
$snapshot = self::getSnapshot($attributes);
$query = array(
'limit' => 1,
'select' => array('ID'),
'filter' => array('=SNAPSHOT' => $snapshot),
);
if ($row = Internals\ContextTable::getList($query)->fetch())
{
$id = (int) $row['ID'];
}
else
{
try
{
$result = Internals\ContextTable::add(array('SNAPSHOT' => $snapshot));
if ($result->isSuccess())
{
$id = $result->getId();
foreach ($attributes as $attribute)
{
// TODO resetContext if not success and return null!!!
$result = Internals\ContextAttributeTable::add(array(
'CONTEXT_ID' => $id,
'NAME' => $attribute['NAME'],
'VALUE' => $attribute['VALUE'],
));
}
}
else
{
throw new DB\SqlQueryException();
}
}
catch (DB\SqlQueryException $e)
{
if ($row = Internals\ContextTable::getList($query)->fetch())
{
$id = (int) $row['ID'];
}
}
}
}
}
private static function getSnapshot(array $attributes)
{
$keys = array_keys($attributes);
sort($keys);
$str1 = implode(';', $keys);
$str2 = strrev($str1);
return md5($str1).md5($str2);
}
}