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<?php |
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namespace leandrogehlen\exporter\serializers; |
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use leandrogehlen\exporter\data\Column; |
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use leandrogehlen\exporter\data\Dictionary; |
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use leandrogehlen\exporter\data\Exporter; |
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use leandrogehlen\exporter\data\Provider; |
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use leandrogehlen\exporter\data\Session; |
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use yii\base\InvalidConfigException; |
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use yii\base\Object; |
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use yii\db\Query; |
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use yii\helpers\ArrayHelper; |
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/** |
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* Serializer converts DB data into specific before it is sent out |
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* |
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* @author Leandro Guindani Gehlen <[email protected]> |
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*/ |
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abstract class Serializer extends Object |
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{ |
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/** |
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* @event Event an event raised at the beginning of serialize row |
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*/ |
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const EVENT_BEFORE_SERIALIZE_ROW = 'beforeSerializeRow'; |
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/** |
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* @var Exporter |
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*/ |
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public $exporter; |
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/** |
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* Serializes the given session into a format that can be easily turned into other formats. |
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* @param Session[] $sessions |
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* @param array $master |
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* @return array |
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*/ |
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abstract public function serialize($sessions, $master = []); |
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/** |
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* Formats the specified data. |
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* @param array $data |
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* @return string |
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*/ |
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abstract public function formatData($data); |
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/** |
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* Executes the query statement and returns ALL rows at once. |
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* @param Provider $provider the provider name |
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* @return array |
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* @throws InvalidConfigException |
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*/ |
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protected function executeProvider($provider, $master) |
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{ |
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$db = $this->exporter->db; |
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$query = $provider->query; |
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if ($query instanceof Query) { |
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list($sql) = $db->getQueryBuilder()->build($query); |
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} elseif (is_string($query)) { |
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$sql = $query; |
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} else { |
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throw new InvalidConfigException('The query of provider "' . $provider->name . '" must be string or Query object'); |
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} |
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$params = []; |
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if (preg_match_all('/:\w+/', $sql, $matches)) { |
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foreach ($matches[0] as $param) { |
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$name = substr($param, 1); |
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$value = ArrayHelper::getValue($master, $name); |
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if ($value === null) { |
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$parameter = $this->exporter->findParameter($name); |
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if ($parameter !== null) { |
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$value = is_callable($parameter->value) ? call_user_func($parameter->value) : $parameter->value; |
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} |
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} |
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$params[$name] = $value; |
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} |
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} |
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return $db->createCommand($sql, $params)->queryAll(); |
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} |
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/** |
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* This method is invoked before serialize row. |
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* @param string|array $record |
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* @param Session $session |
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* @return string|array |
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*/ |
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public function beforeSerializeRow($record, $session) |
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{ |
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$event = $this->exporter->findEvent(self::EVENT_BEFORE_SERIALIZE_ROW); |
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return ($event !== null) ? call_user_func($event->expression, $record, $session) : $record; |
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} |
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/** |
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* Extract formatted value. |
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* @param Column $column |
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* @param array $row |
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* @return mixed|string |
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*/ |
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protected function extractValue($column, $row) |
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{ |
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$complete = $column->complete; |
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$size = $column->size; |
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$format = $column->format; |
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$align = $column->align; |
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$expression = null; |
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$value = ArrayHelper::getValue($row, $column->name); |
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if (is_callable($column->value)){ |
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$expression = $column->value; |
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} elseif ($column->value !== null) { |
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$value = $column->value; |
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} |
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$dictionary = $column->dictionary ? $this->exporter->findDictionary($column->dictionary) : null; |
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if ($dictionary) { |
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if ($dictionary->value) { |
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if ($expression === null && is_callable($dictionary->value)) { |
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$expression = $dictionary->value; |
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} elseif ($value === null) { |
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$value = $dictionary->value; |
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} |
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} |
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if ($complete === null) { |
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$complete = $dictionary->complete; |
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} |
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if ($align === null) { |
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$align = $dictionary->align; |
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} |
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if ($size === null) { |
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$size = $dictionary->size; |
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} |
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if ($format === null) { |
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$format = $dictionary->format; |
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} |
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} |
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if ($format) { |
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$value = $this->exporter->formatter->format($value, $format); |
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} |
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if (is_callable($expression)) { |
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$value = call_user_func($expression, $value, $row); |
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} |
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$value = (string) $value; |
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if ($size === null) { |
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return $value; |
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} else { |
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$padding = $this->toPadding($align); |
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return ($size > strlen($value) && $complete !== null) ? str_pad($value, $size, $complete, $padding) : substr($value, 0, $size); |
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} |
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} |
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/** |
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* Converts the [[align]] property to valid padding type. |
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* @see {@link http://php.net/manual/pt_BR/function.str-pad.php php manual}. |
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* @param string $align the column alignment |
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* @return int |
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*/ |
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private function toPadding($align) |
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{ |
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if ($align == Dictionary::ALIGN_RIGHT) { |
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return STR_PAD_LEFT; |
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} elseif ($align == Dictionary::ALIGN_BOTH) { |
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return STR_PAD_BOTH; |
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} else { |
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return STR_PAD_RIGHT; |
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} |
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} |
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} |
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leandrogehlen /
yii2-data-exporter
