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<?php |
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namespace Rougin\Windstorm\Doctrine\Builder; |
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use Doctrine\DBAL\Platforms\AbstractPlatform; |
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use Doctrine\DBAL\Query\QueryException; |
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/** |
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* Select Query |
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* |
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* @package Windstorm |
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* @author Rougin Gutib <[email protected]> |
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*/ |
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class SelectQuery |
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{ |
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/** |
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* @var array |
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*/ |
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protected $parts = array(); |
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/** |
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* @var \Doctrine\DBAL\Platforms\AbstractPlatform |
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*/ |
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protected $platform; |
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/** |
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* @var integer|null |
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*/ |
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protected $max = null; |
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/** |
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* @var integer|null |
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*/ |
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protected $first = null; |
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/** |
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* Initializes the query instance. |
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* |
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* @param array $parts |
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* @param \Doctrine\DBAL\Platforms\AbstractPlatform $platform |
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* @param integer|null $max |
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* @param integer|null $first |
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*/ |
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public function __construct($parts, AbstractPlatform $platform, $max, $first) |
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{ |
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$this->parts = $parts; |
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$this->platform = $platform; |
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$this->max = $max; |
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$this->first = $first; |
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} |
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/** |
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* Returns the compiled SQL. |
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* |
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* @return string |
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*/ |
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public function get() |
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{ |
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$query = 'SELECT ' . (string) implode(', ', (array) $this->parts['select']); |
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if ($this->parts['from']) |
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{ |
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$query .= ' FROM ' . (string) implode(', ', $this->clauses()); |
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} |
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if ($this->parts['where'] !== null) |
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{ |
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$query .= ' WHERE ' . $this->parts['where']; |
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} |
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$query .= $this->group(); |
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if ($this->max !== null || $this->first !== null) |
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{ |
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return $this->platform->modifyLimitQuery($query, $this->max, $this->first); |
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} |
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return $query; |
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} |
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/** |
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* Verifies and returns the clauses specified. |
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* |
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* @return string[] |
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*/ |
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protected function clauses() |
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{ |
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list($aliases, $clauses) = array(array(), array()); |
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// Loop through all FROM clauses |
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foreach ($this->parts['from'] as $from) |
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{ |
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$sql = $reference = $from['table']; |
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if ($from['alias'] !== null) |
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{ |
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$sql = $from['table'] . ' ' . $from['alias']; |
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$reference = (string) $from['alias']; |
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} |
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$aliases[$reference] = true; |
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$clauses[$reference] = $sql . $this->joins($reference, $aliases); |
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} |
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$this->verify($aliases); |
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return $clauses; |
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} |
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/** |
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* Returns the query for GROUP BY, HAVING, and ORDER BY. |
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* |
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* @return string |
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*/ |
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protected function group() |
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{ |
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$query = ''; |
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if ($this->parts['groupBy']) |
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{ |
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$query .= ' GROUP BY ' . implode(', ', $this->parts['groupBy']); |
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} |
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if ($this->parts['having'] !== null) |
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{ |
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$query .= ' HAVING ' . $this->parts['having']; |
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} |
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if ($this->parts['orderBy']) |
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{ |
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$query .= ' ORDER BY ' . implode(', ', $this->parts['orderBy']); |
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} |
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return $query; |
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} |
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/** |
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* Creates JOIN queries on specified tables. |
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* |
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* @param string $alias |
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* @param array $aliases |
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* @return string |
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* @throws \Doctrine\DBAL\Query\QueryException |
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*/ |
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protected function joins($alias, array &$aliases) |
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{ |
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$sql = ''; |
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if (! isset($this->parts['join'][$alias])) |
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{ |
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return $sql; |
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} |
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foreach ($this->parts['join'][$alias] as $join) |
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{ |
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$sql .= ' ' . strtoupper($join['joinType']) . ' JOIN ' . $join['joinTable']; |
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$sql .= ' ' . $join['joinAlias'] . ' ON ' . ((string) $join['joinCondition']); |
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$aliases[$join['joinAlias']] = true; |
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} |
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foreach ($this->parts['join'][$alias] as $join) |
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{ |
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$sql .= $this->joins($join['joinAlias'], $aliases); |
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} |
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return $sql; |
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} |
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/** |
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* Verifies the specified aliases. |
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* |
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* @param array $aliases |
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* @throws \Doctrine\DBAL\Query\QueryException |
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*/ |
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protected function verify(array $aliases) |
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{ |
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foreach ($this->parts['join'] as $alias => $joins) |
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{ |
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if (! isset($aliases[$alias])) |
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{ |
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throw QueryException::unknownAlias($alias, array_keys($aliases)); |
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} |
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} |
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} |
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} |
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rougin /
windstorm
