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<?php |
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namespace SpareParts\Overseer\Assembly; |
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use SpareParts\Overseer\Context\IVotingContext; |
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use SpareParts\Overseer\InvalidVotingResultException; |
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use SpareParts\Overseer\StrategyEnum; |
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use SpareParts\Overseer\Voter\IVoter; |
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use SpareParts\Overseer\Voter\IVotingSubject; |
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use SpareParts\Overseer\VotingDecisionEnum; |
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use SpareParts\Overseer\VotingResult; |
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class VotingAssembly implements IVotingAssembly |
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{ |
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/** |
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* @var string |
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*/ |
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private $strategy; |
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/** |
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* @var IVoter[] |
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*/ |
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private $voters; |
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/** |
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* @var string |
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*/ |
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private $subjectName; |
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/** |
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* @var string |
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*/ |
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private $actionName; |
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/** |
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* VotingAssembly constructor. |
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* @param string $subjectName |
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* @param string $actionName |
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* @param string $strategy |
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* @param \SpareParts\Overseer\Voter\IVoter[] $voters |
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*/ |
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public function __construct( |
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$subjectName, |
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$actionName, |
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$strategy, |
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array $voters |
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) { |
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$this->strategy = $strategy; |
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$this->voters = $voters; |
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$this->subjectName = $subjectName; |
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$this->actionName = $actionName; |
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} |
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/** |
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* @param \SpareParts\Overseer\Voter\IVotingSubject $votingSubject |
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* @param \SpareParts\Overseer\Context\IVotingContext $votingContext |
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* @return null|\SpareParts\Overseer\IVotingResult |
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* @throws \SpareParts\Overseer\InvalidVotingResultException |
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*/ |
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public function commenceVote(IVotingSubject $votingSubject, IVotingContext $votingContext) |
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{ |
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$result = null; |
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switch ($this->strategy) { |
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case StrategyEnum::FIRST_VOTE_DECIDES(): |
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return $this->strategyFirstVoteDecides($votingSubject, $votingContext); |
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case StrategyEnum::ALLOW_UNLESS_DENIED(): |
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return $this->strategyAllowUnlessDenied($votingSubject, $votingContext); |
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case StrategyEnum::DENY_UNLESS_ALLOWED(): |
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return $this->strategyDenyUnlessAllowed($votingSubject, $votingContext); |
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default: |
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throw new InvalidVotingResultException('Unable to decide on result, invalid strategy: '.$this->strategy); |
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} |
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} |
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/** |
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* @param \SpareParts\Overseer\Voter\IVotingSubject $votingSubject |
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* @param \SpareParts\Overseer\Context\IVotingContext $votingContext |
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* @return \SpareParts\Overseer\IVotingResult |
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* @throws \SpareParts\Overseer\InvalidVotingResultException |
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*/ |
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private function strategyFirstVoteDecides(IVotingSubject $votingSubject, IVotingContext $votingContext) |
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{ |
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foreach ($this->voters as $voter) { |
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if (($lastResult = $voter->vote($votingSubject, $votingContext)) !== null) { |
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return new VotingResult($lastResult->getDecision(), [$lastResult]); |
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} |
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} |
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throw new InvalidVotingResultException('Voting assembly did not decide on any result!'); |
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} |
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/** |
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* @param \SpareParts\Overseer\Voter\IVotingSubject $votingSubject |
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* @param \SpareParts\Overseer\Context\IVotingContext $votingContext |
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* @return \SpareParts\Overseer\IVotingResult |
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*/ |
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View Code Duplication |
private function strategyAllowUnlessDenied($votingSubject, $votingContext) |
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{ |
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$results = []; |
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foreach ($this->voters as $name => $voter) { |
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if (($lastResult = $voter->vote($votingSubject, $votingContext)) !== null) { |
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$results[] = $lastResult; |
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if ($lastResult->getDecision() == VotingDecisionEnum::DENIED()) { |
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return new VotingResult(VotingDecisionEnum::DENIED(), $results); |
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} |
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} |
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} |
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return new VotingResult(VotingDecisionEnum::ALLOWED(), $results); |
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} |
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/** |
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* @param \SpareParts\Overseer\Voter\IVotingSubject $votingSubject |
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* @param \SpareParts\Overseer\Context\IVotingContext $votingContext |
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* @return \SpareParts\Overseer\IVotingResult |
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*/ |
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View Code Duplication |
private function strategyDenyUnlessAllowed($votingSubject, $votingContext) |
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{ |
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$results = []; |
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foreach ($this->voters as $name => $voter) { |
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if (($lastResult = $voter->vote($votingSubject, $votingContext)) !== null) { |
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$results[] = $lastResult; |
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if ($lastResult->getDecision() == VotingDecisionEnum::DENIED()) { |
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return new VotingResult(VotingDecisionEnum::ALLOWED(), $results); |
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} |
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} |
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} |
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return new VotingResult(VotingDecisionEnum::DENIED(), $results); |
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} |
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/** |
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* @param string $actionName |
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* @param \SpareParts\Overseer\Voter\IVotingSubject $subject |
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* @param \SpareParts\Overseer\Context\IVotingContext $context |
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* @return bool |
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*/ |
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public function canVoteOn($actionName, IVotingSubject $subject, IVotingContext $context) |
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{ |
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if ($subject->getVotingSubjectName() === $this->subjectName && $actionName === $this->actionName) { |
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return true; |
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} |
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return false; |
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} |
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} |
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.