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<?php |
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/* |
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Condorcet PHP - Election manager and results calculator. |
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Designed for the Condorcet method. Integrating a large number of algorithms extending Condorcet. Expandable for all types of voting systems. |
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By Julien Boudry and contributors - MIT LICENSE (Please read LICENSE.txt) |
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https://github.com/julien-boudry/Condorcet |
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*/ |
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declare(strict_types=1); |
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namespace CondorcetPHP\Condorcet\ElectionProcess; |
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use CondorcetPHP\Condorcet\{Candidate, CondorcetUtil}; |
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use CondorcetPHP\Condorcet\Throwable\CondorcetException; |
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// Manage Candidates for Election class |
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trait CandidatesProcess |
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{ |
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/////////// CONSTRUCTOR /////////// |
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// Data and global options |
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protected $_Candidates = []; // Candidate list |
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protected $_AutomaticNewCandidateName = 'A'; |
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/////////// GET CANDIDATES /////////// |
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// Count registered candidates |
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public function countCandidates () : int |
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{ |
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return count($this->_Candidates); |
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} |
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public function getCandidatesList () : array |
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{ |
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return $this->_Candidates; |
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} |
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// Get the list of registered CANDIDATES |
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public function getCandidatesListAsString () : array |
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{ |
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$result = []; |
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foreach ($this->_Candidates as $candidateKey => &$oneCandidate) : |
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$result[$candidateKey] = $oneCandidate->getName(); |
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endforeach; |
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return $result; |
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} |
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public function getCandidateKey ($candidate) : ?int |
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{ |
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if ($candidate instanceof Candidate) : |
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$r = array_search($candidate, $this->_Candidates, true); |
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else: |
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$r = array_search(trim((string) $candidate), $this->_Candidates, false); |
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endif; |
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return ($r !== false) ? $r : null; |
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} |
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public function getCandidateObjectFromKey (int $candidate_key) : ?Candidate |
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{ |
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if (!array_key_exists($candidate_key, $this->_Candidates)) : |
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return null; |
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else : |
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return $this->_Candidates[$candidate_key]; |
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endif; |
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} |
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public function isRegisteredCandidate ($candidate, bool $strictMode = true) : bool |
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{ |
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return $strictMode ? in_array($candidate, $this->_Candidates, true) : in_array((string) $candidate, $this->_Candidates); |
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} |
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public function getCandidateObjectFromName (string $candidateName) : ?Candidate |
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{ |
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foreach ($this->_Candidates as $oneCandidate) : |
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if ($oneCandidate->getName() === $candidateName) : |
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return $oneCandidate; |
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endif; |
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endforeach; |
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return null; |
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} |
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/////////// ADD & REMOVE CANDIDATE /////////// |
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// Add a vote candidate before voting |
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public function addCandidate ($candidate = null) : Candidate |
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{ |
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// only if the vote has not started |
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if ( $this->_State > 1 ) : |
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throw new CondorcetException(2); |
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endif; |
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// Filter |
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if ( is_bool($candidate) || is_array($candidate) || (is_object($candidate) && !($candidate instanceof Candidate)) ) : |
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throw new CondorcetException(1); |
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endif; |
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// Process |
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if ( empty($candidate) ) : |
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while ( !$this->canAddCandidate($this->_AutomaticNewCandidateName) ) : |
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$this->_AutomaticNewCandidateName++; |
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endwhile; |
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$newCandidate = new Candidate($this->_AutomaticNewCandidateName); |
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else : // Try to add the candidate_id |
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$newCandidate = ($candidate instanceof Candidate) ? $candidate : new Candidate ((string) $candidate); |
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if ( !$this->canAddCandidate($newCandidate) ) : |
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throw new CondorcetException(3,(string) $candidate); |
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endif; |
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endif; |
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// Register it |
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$this->_Candidates[] = $newCandidate; |
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// Linking |
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$newCandidate->registerLink($this); |
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// Disallow other candidate object name matching |
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$newCandidate->setProvisionalState(false); |
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return $newCandidate; |
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} |
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public function canAddCandidate ($candidate) : bool |
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{ |
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return !$this->isRegisteredCandidate($candidate, false); |
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} |
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// Destroy a register vote candidate before voting |
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public function removeCandidates ($candidates_input) : array |
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{ |
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// only if the vote has not started |
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if ( $this->_State > 1 ) : |
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throw new CondorcetException(2); |
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endif; |
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if ( !is_array($candidates_input) ) : |
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$candidates_input = [$candidates_input]; |
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endif; |
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foreach ($candidates_input as &$candidate) : |
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$candidate_key = $this->getCandidateKey($candidate); |
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if ( $candidate_key === null ) : |
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throw new CondorcetException(4,$candidate); |
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endif; |
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$candidate = $candidate_key; |
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endforeach; |
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$rem = []; |
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foreach ($candidates_input as $candidate_key) : |
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$this->_Candidates[$candidate_key]->destroyLink($this); |
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$rem[] = $this->_Candidates[$candidate_key]; |
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unset($this->_Candidates[$candidate_key]); |
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endforeach; |
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return $rem; |
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} |
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/////////// PARSE CANDIDATES /////////// |
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public function addCandidatesFromJson (string $input) : array |
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{ |
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$input = CondorcetUtil::prepareJson($input); |
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////// |
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$adding = []; |
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foreach ($input as $candidate) : |
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$candidate = new Candidate ($candidate); |
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if (!$this->canAddCandidate($candidate)) : |
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throw new CondorcetException(3); |
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endif; |
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$adding[] = $candidate; |
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endforeach; |
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// Add Candidates |
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foreach ($adding as $oneCandidate) : |
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$this->addCandidate($oneCandidate); |
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endforeach; |
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return $adding; |
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} |
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public function parseCandidates (string $input, bool $isFile = false) : array |
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{ |
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$input = CondorcetUtil::prepareParse($input, $isFile); |
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$adding = []; |
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foreach ($input as $line) : |
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// Empty Line |
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if (empty($line)) : |
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continue; |
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endif; |
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// addCandidate |
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if (self::$_maxParseIteration !== null && count($adding) >= self::$_maxParseIteration) : |
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throw new CondorcetException(12, (string) self::$_maxParseIteration); |
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endif; |
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if (!$this->canAddCandidate($line)) : |
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throw new CondorcetException(3); |
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endif; |
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$adding[] = $line; |
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endforeach; |
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foreach ($adding as $oneNewCandidate) : |
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$this->addCandidate($oneNewCandidate); |
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endforeach; |
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return $adding; |
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} |
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} |
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