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<?php |
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/** |
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* This file is part of Phuria SQL Builder package. |
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* |
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* Copyright (c) 2016 Beniamin Jonatan Šimko |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Phuria\UnderQuery\QueryCompiler; |
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use Phuria\UnderQuery\JoinType; |
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use Phuria\UnderQuery\QueryBuilder\Component; |
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use Phuria\UnderQuery\QueryBuilder\DeleteBuilder; |
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use Phuria\UnderQuery\QueryBuilder\SelectBuilder; |
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use Phuria\UnderQuery\Table\AbstractTable; |
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/** |
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* @author Beniamin Jonatan Šimko <[email protected]> |
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*/ |
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class TableCompiler |
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{ |
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/** |
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* @var array |
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*/ |
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private $joinPrefixes; |
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/** |
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* TableCompiler constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->joinPrefixes = [ |
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JoinType::CROSS_JOIN => 'CROSS', |
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JoinType::LEFT_JOIN => 'LEFT', |
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JoinType::RIGHT_JOIN => 'RIGHT', |
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JoinType::INNER_JOIN => 'INNER', |
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JoinType::STRAIGHT_JOIN => 'STRAIGHT_JOIN' |
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]; |
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} |
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/** |
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* @param AbstractTable $table |
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* |
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* @return string |
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*/ |
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public function compileTableDeclaration(AbstractTable $table) |
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{ |
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$declaration = ''; |
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if ($table->isJoin()) { |
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$declaration .= $this->compileJoinName($table) . ' '; |
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} |
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$declaration .= $table->getTableName(); |
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if ($alias = $table->getAlias()) { |
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$declaration .= ' AS ' . $alias; |
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} |
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if ($joinOn = $table->getJoinOn()) { |
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$declaration .= ' ON ' . $joinOn; |
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} |
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return $declaration; |
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} |
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/** |
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* @param AbstractTable $table |
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* |
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* @return string |
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*/ |
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private function compileJoinName(AbstractTable $table) |
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{ |
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return implode(' ', array_filter([ |
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$table->isNaturalJoin() ? 'NATURAL' : '', |
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$this->compileJoinPrefix($table->getJoinType()), |
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$table->isOuterJoin() ? 'OUTER' : '', |
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$this->compileJoinSuffix($table->getJoinType()) |
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])); |
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} |
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/** |
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* @param int $joinType |
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* |
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* @return string |
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*/ |
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private function compileJoinPrefix($joinType) |
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{ |
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if (array_key_exists($joinType, $this->joinPrefixes)) { |
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return $this->joinPrefixes[$joinType]; |
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} |
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return null; |
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} |
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/** |
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* @param int $joinType |
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* |
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* @return string |
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*/ |
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private function compileJoinSuffix($joinType) |
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{ |
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return $joinType === JoinType::STRAIGHT_JOIN ? '' : 'JOIN'; |
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} |
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/** |
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* @param CompilerPayload $payload |
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* |
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* @return CompilerPayload |
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*/ |
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public function compileRootTables(CompilerPayload $payload) |
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{ |
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$builder = $payload->getBuilder(); |
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$newSQL = ''; |
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if ($builder instanceof Component\TableComponentInterface && $builder->getRootTables()) { |
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$newSQL = implode(', ', array_map([$this, 'compileTableDeclaration'], $builder->getRootTables())); |
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} |
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if ($builder instanceof SelectBuilder || $builder instanceof DeleteBuilder) { |
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$newSQL = $newSQL ? 'FROM ' . $newSQL : ''; |
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} |
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return $payload->appendSQL($newSQL); |
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} |
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/** |
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* @param CompilerPayload $payload |
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* |
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* @return CompilerPayload |
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*/ |
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public function compileJoinTables(CompilerPayload $payload) |
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{ |
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$builder = $payload->getBuilder(); |
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if ($builder instanceof Component\JoinComponentInterface) { |
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$newSQL = implode(' ', array_map([$this, 'compileTableDeclaration'], $builder->getJoinTables())); |
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return $payload->appendSQL($newSQL); |
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} |
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return $payload; |
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} |
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} |
phuria /
under-query
