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<?php |
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/** |
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* Created by PhpStorm. |
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* User: Adrian Dumitru |
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* Date: 8/15/2017 |
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* Time: 12:15 PM |
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*/ |
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namespace Qpdb\QueryBuilder\Traits; |
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use Qpdb\QueryBuilder\Dependencies\QueryException; |
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use Qpdb\QueryBuilder\Dependencies\QueryHelper; |
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use Qpdb\QueryBuilder\Dependencies\QueryStructure; |
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trait SelectFields |
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{ |
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use Objects; |
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/** |
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* @param string|array $fields |
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* @return $this |
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* @throws QueryException |
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*/ |
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public function fields( $fields ) |
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{ |
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switch ( gettype( $fields ) ) { |
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case QueryStructure::ELEMENT_TYPE_ARRAY: |
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$fields = $this->prepareArrayFields( $fields ); |
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if ( count( $fields ) ) |
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$this->queryStructure->setElement( QueryStructure::FIELDS, implode( ', ', $fields ) ); |
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else |
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$this->queryStructure->setElement( QueryStructure::FIELDS, '*' ); |
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break; |
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case QueryStructure::ELEMENT_TYPE_STRING: |
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$fields = trim( $fields ); |
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if ( '' !== $fields ) { |
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$fields = explode( ',', $fields ); |
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$fields = $this->prepareArrayFields( $fields ); |
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$this->queryStructure->setElement( QueryStructure::FIELDS, implode( ', ', $fields ) ); |
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} |
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else |
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$this->queryStructure->setElement( QueryStructure::FIELDS, '*' ); |
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break; |
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default: |
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throw new QueryException( 'Invalid fields parameter type', QueryException::QUERY_ERROR_WHERE_INVALID_PARAM_ARRAY ); |
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} |
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return $this; |
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} |
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public function fieldsByExpression( $expression ) |
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{ |
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$expression = trim( $expression ); |
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$this->queryStructure->setElement( QueryStructure::FIELDS, $expression ); |
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return $this; |
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} |
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/** |
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* @param array $fieldsArray |
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* @return array |
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* @throws QueryException |
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*/ |
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private function prepareArrayFields( $fieldsArray = array() ) |
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{ |
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$prepareArray = []; |
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foreach ( $fieldsArray as $field ) { |
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switch ( gettype( $field ) ) { |
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case QueryStructure::ELEMENT_TYPE_STRING: |
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$prepareArray[] = $this->queryStructure->prepare( $field ); |
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break; |
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case QueryStructure::ELEMENT_TYPE_ARRAY: |
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$prepareArray[] = $this->getFieldByArray( $field ); |
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break; |
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default: |
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throw new QueryException('Invalid field description'); |
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} |
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} |
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return $prepareArray; |
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} |
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/** |
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* @param array $fieldArray |
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* @return string |
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* @throws QueryException |
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*/ |
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private function getFieldByArray( array $fieldArray ) |
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{ |
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if ( !in_array( count( $fieldArray ), [ 1, 2 ] ) ) { |
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throw new QueryException( 'Invalid descriptive array from field.' ); |
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} |
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if ( count( $fieldArray ) === 1 ) { |
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return $this->queryStructure->prepare( trim( $fieldArray[ 0 ] ) ); |
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} |
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else { |
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return $this->queryStructure->prepare( trim( $fieldArray[ 0 ] ) ) . ' ' . $this->queryStructure->prepare( trim( $fieldArray[ 1 ] ) ); |
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} |
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} |
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} |
adumitru68 /
QueryBuilder
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