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<?php |
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/* |
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* @copyright (c) 2019 Mendel <[email protected]> |
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* @license see license.txt |
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*/ |
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namespace drycart\data; |
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/** |
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* Helper for flexible conditions |
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* |
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* @author mendel |
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*/ |
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class CheckHelper |
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{ |
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protected static $allRules = []; |
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/** |
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* Check if data satisfies the condition |
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* |
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* @param mixed $data |
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* @param array $conditions |
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* @return bool |
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*/ |
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public static function check($data, array $conditions) : bool |
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{ |
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$args = self::tryPrepareSimpleRules($conditions); |
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$type = array_shift($args); |
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switch (strtolower($type)) { |
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case 'and': |
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return self::checkAnd($data, $args); |
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case 'or': |
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return self::checkOr($data, $args); |
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case 'not': |
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return !self::check($data, $args[0]); |
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default: |
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return self::checkField($data, $type, $args[0], $args[1]); |
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} |
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} |
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/** |
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* If array of rules is in "simple format" |
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* convert it to full format |
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* |
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* @param array $rules |
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* @return array |
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*/ |
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protected static function tryPrepareSimpleRules(array $rules) : array |
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{ |
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self::initAllRules(); |
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if(empty($rules) or isset($rules[0])) { |
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return $rules; |
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} |
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$result = ['and']; |
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foreach($rules as $fieldRule=>$arg2) { |
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[$rule, $arg1] = StrHelper::findPrefix($fieldRule, static::$allRules, '='); |
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$result[] = [$rule, $arg1, $arg2]; |
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} |
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return $result; |
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} |
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/** |
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* Init list of rules if not initialized |
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* |
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* @return void |
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*/ |
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public static function initAllRules() : void |
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{ |
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if(empty(static::$allRules)) { |
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foreach(CompareHelper::RULES as $rule) { |
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static::$allRules[] = '*'.$rule; |
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static::$allRules[] = $rule; |
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} |
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foreach(array_keys(CompareHelper::RULES_ALIASES) as $rule) { |
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static::$allRules[] = '*'.$rule; |
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static::$allRules[] = $rule; |
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} |
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// Sort by lenght |
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usort(static::$allRules, function(string $a, string $b) : int { |
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return strlen($b) <=> strlen($a); // for reversal result |
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}); |
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} |
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} |
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/** |
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* Check AND condition |
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* |
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* @param mixed $data |
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* @param array $conditions |
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* @return bool |
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*/ |
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protected static function checkAnd($data, array $conditions) : bool |
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{ |
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foreach($conditions as $line) { |
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if(!self::check($data,$line)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Check OR condition |
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* |
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* @param mixed $data |
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* @param array $conditions |
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* @return bool |
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*/ |
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protected static function checkOr($data, array $conditions) : bool |
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{ |
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foreach($conditions as $line) { |
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if(self::check($data,$line)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Check/compare some field by rule and some value |
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* |
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* @param mixed $data |
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* @param string $staredRule |
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* @param mixed $arg1 |
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* @param mixed $arg2 |
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* @return bool |
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*/ |
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protected static function checkField($data, string $staredRule, $arg1, $arg2) : bool |
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{ |
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[$rulePrefix, $rule] = StrHelper::findPrefix($staredRule, ['*']); |
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$value1 = $data->$arg1; |
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if($rulePrefix == '*') { |
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$value2 = $data->$arg2; |
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} else { |
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$value2 = $arg2; |
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} |
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return CompareHelper::compareByRule($rule, $value1, $value2); |
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} |
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} |
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drycart /
data
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This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.