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<?php |
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namespace PhpAbac\Manager; |
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use PhpAbac\Configuration\Configuration; |
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use PhpAbac\Model\{ |
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PolicyRule, |
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PolicyRuleAttribute |
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}; |
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class PolicyRuleManager implements PolicyRuleManagerInterface |
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{ |
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/** @var AttributeManager * */ |
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private $attributeManager; |
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/** @var array **/ |
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private $rules = []; |
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public function __construct(Configuration $configuration, AttributeManager $attributeManager) |
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{ |
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$this->attributeManager = $attributeManager; |
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$this->rules = $configuration->getRules(); |
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} |
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public function getRule(string $ruleName, $user, $resource): array |
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{ |
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if (!isset($this->rules[$ruleName])) { |
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throw new \InvalidArgumentException('The given rule "' . $ruleName . '" is not configured'); |
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} |
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// TODO check if this is really useful |
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// force to treat always arrays |
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if (array_key_exists('attributes', $this->rules[$ruleName])) { |
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$this->rules[$ruleName] = [$this->rules[$ruleName]]; |
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} |
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$rules = []; |
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foreach ($this->rules[$ruleName] as $rule) { |
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$policyRule = (new PolicyRule())->setName($ruleName); |
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// For each policy rule attribute, the data is formatted |
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foreach ($this->processRuleAttributes($rule['attributes'], $user, $resource) as $pra) { |
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$policyRule->addPolicyRuleAttribute($pra); |
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} |
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$rules[] = $policyRule; |
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} |
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return $rules; |
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} |
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/** |
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* This method is meant to convert attribute data from array to formatted policy rule attribute |
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*/ |
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public function processRuleAttributes(array $attributes, $user, $resource) |
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{ |
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foreach ($attributes as $attributeName => $attribute) { |
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$pra = (new PolicyRuleAttribute()) |
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->setAttribute($this->attributeManager->getAttribute($attributeName)) |
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->setComparison($attribute['comparison']) |
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->setComparisonType($attribute['comparison_type']) |
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->setValue((isset($attribute['value'])) ? $attribute['value'] : null) |
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->setGetterParams(isset($attribute[ 'getter_params' ]) ? $attribute[ 'getter_params' ] : []); |
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$this->processRuleAttributeComparisonType($pra, $user, $resource); |
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// In the case the user configured more keys than the basic ones |
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// it will be stored as extra data |
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foreach ($attribute as $key => $value) { |
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if (!in_array($key, ['comparison', 'comparison_type', 'value','getter_params'])) { |
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$pra->addExtraData($key, $value); |
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} |
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} |
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// This generator avoid useless memory consumption instead of returning a whole array |
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yield $pra; |
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} |
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} |
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/** |
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* This method is meant to set appropriated extra data to $pra depending on comparison type |
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*/ |
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protected function processRuleAttributeComparisonType(PolicyRuleAttribute $pra, $user, $resource) |
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{ |
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switch ($pra->getComparisonType()) { |
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case 'user': |
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$pra->setExtraData(['user' => $user]); |
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break; |
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case 'object': |
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$pra->setExtraData(['resource' => $resource]); |
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break; |
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} |
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} |
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} |
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CraftCamp /
php-abac
