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<?php |
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/** |
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* InlineSqlMinimalConverter |
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* |
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* @package php-logical-filter |
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* @author Jean Claveau |
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*/ |
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namespace JClaveau\LogicalFilter\Converter; |
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use JClaveau\LogicalFilter\LogicalFilter; |
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use JClaveau\LogicalFilter\Rule\EqualRule; |
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use JClaveau\LogicalFilter\Rule\NotEqualRule; |
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use JClaveau\LogicalFilter\Rule\AboveRule; |
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use JClaveau\LogicalFilter\Rule\BelowRule; |
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use JClaveau\LogicalFilter\Rule\RegexpRule; |
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use JClaveau\LogicalFilter\Rule\InRule; |
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use JClaveau\LogicalFilter\Rule\NotInRule; |
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use JClaveau\LogicalFilter\Rule\AboveOrEqualRule; |
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use JClaveau\LogicalFilter\Rule\BelowOrEqualRule; |
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/** |
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* This class implements a converter for MySQL. |
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*/ |
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class InlineSqlMinimalConverter extends MinimalConverter |
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{ |
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/** @var array $output */ |
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protected $output = []; |
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/** @var array $parameters */ |
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protected $parameters = []; |
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/** |
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* @return string parameter id |
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*/ |
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public function addParameter($value) |
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{ |
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if (is_numeric($value)) |
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return $value; |
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$uid = 'param_'.hash('crc32b', serialize($value)); |
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if (isset($this->parameters[$uid])) |
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return ':'.$uid; |
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$this->parameters[$uid] = $value; |
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return ':'.$uid; |
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} |
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/** |
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* @param LogicalFilter $filter |
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*/ |
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public function convert( LogicalFilter $filter ) |
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{ |
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$this->output = []; |
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parent::convert($filter); |
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return [ |
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'sql' => ! $this->output |
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? '1' // True |
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: '('.implode(') OR (', $this->output).')', |
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'parameters' => $this->parameters, |
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]; |
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} |
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/** |
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*/ |
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public function onOpenOr() |
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{ |
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$this->output[] = []; |
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} |
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/** |
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*/ |
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public function onCloseOr() |
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{ |
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$last_key = $this->getLastOrOperandKey(); |
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$this->output[ $last_key ] = implode(' AND ', $this->output[ $last_key ]); |
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} |
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/** |
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* Pseudo-event called while for each And operand of the root Or. |
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* These operands must be only atomic Rules. |
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*/ |
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public function onAndPossibility($field, $operator, $rule, array $allOperandsByField) |
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{ |
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if ($rule instanceof EqualRule) { |
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$value = $rule->getValue(); |
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} |
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elseif ($rule instanceof InRule) { |
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$value = $rule->getPossibilities(); |
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} |
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elseif ($rule instanceof NotInRule) { |
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$operator = 'NOT IN'; |
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$value = $rule->getPossibilities(); |
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} |
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elseif ($rule instanceof AboveRule) { |
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$value = $rule->getLowerLimit(); |
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} |
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elseif ($rule instanceof BelowRule) { |
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$value = $rule->getUpperLimit(); |
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} |
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elseif ($rule instanceof AboveOrEqualRule) { |
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$value = $rule->getMinimum(); |
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} |
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elseif ($rule instanceof BelowOrEqualRule) { |
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$value = $rule->getMaximum(); |
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} |
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elseif ($rule instanceof NotEqualRule) { |
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$value = $rule->getValue(); |
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} |
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elseif ($rule instanceof RegexpRule) { |
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$value = RegexpRule::php2mariadbPCRE( $rule->getPattern() ); |
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} |
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else { |
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throw new \InvalidArgumentException( |
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"Unhandled operator '$operator' during SQL query generation" |
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); |
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} |
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if (gettype($value) == 'integer') { |
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} |
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elseif (gettype($value) == 'double') { |
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// TODO disable locale to handle separators |
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} |
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elseif ($value instanceof \DateTime) { |
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$value = "'" . $value->format('Y-m-d H:i:s') . "'"; |
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} |
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elseif (gettype($value) == 'string') { |
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$value = $this->addParameter($value); |
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} |
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elseif (gettype($value) == 'array') { |
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$sql_part = []; |
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foreach ($value as $possibility) { |
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$sql_part[] = $this->addParameter($possibility); |
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} |
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$value = '(' . implode(', ', $sql_part) . ')'; |
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} |
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elseif ($value === null) { |
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$value = "NULL"; |
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if ($rule instanceof EqualRule) { |
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$operator = 'IS'; |
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} |
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elseif ($rule instanceof NotEqualRule) { |
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$operator = 'IS NOT'; |
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} |
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else { |
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throw new \InvalidArgumentException( |
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"NULL is only handled for equality / difference" |
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); |
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} |
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} |
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else { |
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throw new \InvalidArgumentException( |
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"Unhandled type of value: ".gettype($value). ' | ' .var_export($value, true) |
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); |
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} |
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$operator = strtoupper($operator); |
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$new_rule = "$field $operator $value"; |
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$this->appendToLastOrOperandKey($new_rule); |
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} |
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/** |
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*/ |
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protected function getLastOrOperandKey() |
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{ |
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end($this->output); |
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return key($this->output); |
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} |
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/** |
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* @param string $rule |
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*/ |
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protected function appendToLastOrOperandKey($rule) |
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{ |
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$last_key = $this->getLastOrOperandKey(); |
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$this->output[ $last_key ][] = $rule; |
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} |
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/**/ |
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} |
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