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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db\conditions;
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use yii\db\ExpressionBuilderInterface;
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use yii\db\ExpressionBuilderTrait;
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use yii\db\ExpressionInterface;
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use yii\db\Query;
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/**
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* Class InConditionBuilder builds objects of [[InCondition]]
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*
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* @author Dmytro Naumenko <d.naumenko.a@gmail.com>
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* @since 2.0.14
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*/
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class InConditionBuilder implements ExpressionBuilderInterface
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{
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use ExpressionBuilderTrait;
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/**
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* Method builds the raw SQL from the $expression that will not be additionally
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* escaped or quoted.
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*
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* @param ExpressionInterface|InCondition $expression the expression to be built.
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* @param array $params the binding parameters.
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* @return string the raw SQL that will not be additionally escaped or quoted.
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*/
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public function build(ExpressionInterface $expression, array &$params = [])
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{
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$operator = $expression->getOperator();
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$column = $expression->getColumn();
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$values = $expression->getValues();
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if ($column === []) {
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// no columns to test against
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return $operator === 'IN' ? '0=1' : '';
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}
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if ($values instanceof Query) {
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return $this->buildSubqueryInCondition($operator, $column, $values, $params);
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}
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if (!is_array($values) && !$values instanceof \Traversable) {
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// ensure values is an array
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$values = (array) $values;
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}
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if ($column instanceof \Traversable || ((is_array($column) || $column instanceof \Countable) && count($column) > 1)) {
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return $this->buildCompositeInCondition($operator, $column, $values, $params);
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}
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if (is_array($column)) {
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$column = reset($column);
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}
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$sqlValues = $this->buildValues($expression, $values, $params);
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if (empty($sqlValues)) {
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return $operator === 'IN' ? '0=1' : '';
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}
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if (strpos($column, '(') === false) {
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$column = $this->queryBuilder->db->quoteColumnName($column);
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}
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if (count($sqlValues) > 1) {
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return "$column $operator (" . implode(', ', $sqlValues) . ')';
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}
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$operator = $operator === 'IN' ? '=' : '<>';
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return $column . $operator . reset($sqlValues);
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}
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/**
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* Builds $values to be used in [[InCondition]]
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*
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* @param ConditionInterface|InCondition $condition
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* @param array $values
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* @param array $params the binding parameters
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* @return array of prepared for SQL placeholders
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*/
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protected function buildValues(ConditionInterface $condition, $values, &$params)
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{
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$sqlValues = [];
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$column = $condition->getColumn();
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foreach ($values as $i => $value) {
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if (is_array($value) || $value instanceof \ArrayAccess) {
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$value = isset($value[$column]) ? $value[$column] : null;
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}
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if ($value === null) {
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$sqlValues[$i] = 'NULL';
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} elseif ($value instanceof ExpressionInterface) {
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$sqlValues[$i] = $this->queryBuilder->buildExpression($value, $params);
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} else {
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$sqlValues[$i] = $this->queryBuilder->bindParam($value, $params);
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}
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}
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return $sqlValues;
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}
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/**
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* Builds SQL for IN condition.
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*
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* @param string $operator
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* @param array|string $columns
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* @param Query $values
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* @param array $params
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* @return string SQL
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*/
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protected function buildSubqueryInCondition($operator, $columns, $values, &$params)
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{
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$sql = $this->queryBuilder->buildExpression($values, $params);
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if (is_array($columns)) {
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foreach ($columns as $i => $col) {
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if (strpos($col, '(') === false) {
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$columns[$i] = $this->queryBuilder->db->quoteColumnName($col);
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}
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}
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return '(' . implode(', ', $columns) . ") $operator $sql";
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}
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if (strpos($columns, '(') === false) {
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$columns = $this->queryBuilder->db->quoteColumnName($columns);
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}
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return "$columns $operator $sql";
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}
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/**
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* Builds SQL for IN condition.
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*
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* @param string $operator
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* @param array|\Traversable $columns
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* @param array $values
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* @param array $params
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* @return string SQL
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*/
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protected function buildCompositeInCondition($operator, $columns, $values, &$params)
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{
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$vss = [];
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foreach ($values as $value) {
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$vs = [];
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foreach ($columns as $column) {
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if (isset($value[$column])) {
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$vs[] = $this->queryBuilder->bindParam($value[$column], $params);
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} else {
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$vs[] = 'NULL';
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}
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}
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$vss[] = '(' . implode(', ', $vs) . ')';
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}
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if (empty($vss)) {
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return $operator === 'IN' ? '0=1' : '';
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}
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$sqlColumns = [];
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foreach ($columns as $i => $column) {
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$sqlColumns[] = strpos($column, '(') === false ? $this->queryBuilder->db->quoteColumnName($column) : $column;
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}
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return '(' . implode(', ', $sqlColumns) . ") $operator (" . implode(', ', $vss) . ')';
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}
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}
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