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<?php |
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namespace JayaCode\Framework\Core\Database\Query\Grammar; |
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use JayaCode\Framework\Core\Database\Query\Query; |
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use Stringy\Stringy; |
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/** |
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* Class GrammarMySql |
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* @package JayaCode\Framework\Core\Database\Query\Grammar |
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*/ |
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class GrammarMySql extends Grammar |
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{ |
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/** |
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* @return string |
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*/ |
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public function build() |
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{ |
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switch ($this->query->getType()) { |
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case Query::TYPE_SELECT: |
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return $this->select(); |
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case Query::TYPE_INSERT: |
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return $this->insert(); |
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case Query::TYPE_UPDATE: |
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return $this->update(); |
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case Query::TYPE_QUERY: |
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return $this->query->query; |
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} |
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return null; |
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} |
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/** |
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* @return string |
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*/ |
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private function select() |
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{ |
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$this->queryString = "SELECT "; |
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$this->queryString .= $this->selectColumn(); |
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$table = $this->query->table; |
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$this->queryString .= " FROM {$this->getFormattedTableOrColumn($table)}"; |
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$this->queryString .= $this->where(); |
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return $this->queryString; |
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} |
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/** |
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* @return string |
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*/ |
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private function selectColumn() |
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{ |
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$columns = $this->query->columns; |
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if (is_null($columns)) { |
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$columns = [Query::sql("*")]; |
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} |
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if (is_string($columns)) { |
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$columns = array($columns); |
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} |
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foreach ($columns as $key => $val) { |
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if ($columns[$key] instanceof Query) { |
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$columns[$key] = $columns[$key]->query; |
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} else { |
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$columns[$key] = $this->getFormattedTableOrColumn($val); |
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} |
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} |
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return implode(', ', $columns); |
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} |
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/** |
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* @return string |
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*/ |
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private function where() |
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{ |
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if (count($this->query->where) <= 0) { |
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return ""; |
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} |
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$q = Stringy::create(""); |
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foreach ($this->query->where as $where) { |
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$type = $where[0]; |
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$arr = $where[1]; |
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if ($q->count() > 1) { |
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$q = $q->append(" {$type} "); |
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} |
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if (is_string($arr)) { |
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$q = $q->append($arr); |
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} |
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if (is_array($arr)) { |
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$q = $q->append($this->buildArrWhere($arr)); |
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$this->params[] = $arr[2]; |
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} |
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} |
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return $q->count()?$q->prepend(" WHERE ")->__toString():""; |
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} |
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/** |
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* @param $arr |
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* @return string |
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*/ |
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private function buildArrWhere($arr) |
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{ |
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if (count($arr) != 3) { |
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throw new \OutOfBoundsException(); |
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} |
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switch ($arr[1]) { |
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case "BETWEEN": |
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return "`{$arr[0]}` {$arr[1]} ? AND ?"; |
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default: |
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return "`{$arr[0]}` {$arr[1]} ?"; |
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} |
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} |
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/** |
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* @return string |
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*/ |
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private function insert() |
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{ |
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$this->params = $this->query->values; |
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$table = $this->query->table; |
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$this->queryString = "INSERT INTO {$this->getFormattedTableOrColumn($table)}"; |
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$this->queryString .= "({$this->selectColumn()})"; |
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$this->queryString .= " VALUES("; |
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$params = array(); |
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for ($i=0, $c=count($this->query->columns); $i<$c; $i++) { |
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$params[$i] = "?"; |
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} |
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$this->queryString .= join(', ', $params).")"; |
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return $this->queryString; |
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} |
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/** |
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* |
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*/ |
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private function update() |
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{ |
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$this->params = $this->query->values; |
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$table = $this->query->table; |
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$this->queryString = "UPDATE {$this->getFormattedTableOrColumn($table)} SET "; |
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$arrSet = array(); |
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foreach ($this->query->columns as $column) { |
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$arrSet[] = "{$this->getFormattedTableOrColumn($column)} = ?"; |
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} |
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$this->queryString .= join(", ", $arrSet); |
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$this->queryString .= $this->where(); |
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return $this->queryString; |
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} |
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/** |
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* @param null $str |
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* @return null|string |
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*/ |
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private function getFormattedTableOrColumn($str = null) |
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{ |
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$tmpStr = $str?$str:$this->query->table; |
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$strArr = explode(".", $tmpStr); |
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foreach ($strArr as $key => $val) { |
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$strArr[$key] = "`{$val}`"; |
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} |
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return join(".", $strArr); |
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} |
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} |
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jayacode /
framework
