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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 Condorcet\ElectionProcess; |
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use Condorcet\Candidate; |
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use Condorcet\CondorcetException; |
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use Condorcet\CondorcetUtil; |
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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 $_i_CandidateId = 'A'; |
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/////////// GET CANDIDATES /////////// |
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// Count registered candidates |
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public function countCandidates () : int |
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{ |
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return count($this->_Candidates); |
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} |
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// Get the list of registered CANDIDATES |
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public function getCandidatesList (bool $stringMode = false) : array |
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{ |
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if (!$stringMode) : |
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return $this->_Candidates; |
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else : |
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$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 $result; |
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endif; |
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} |
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public function getCandidateKey ($candidate_id) |
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{ |
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if ($candidate_id instanceof Candidate) : |
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return array_search($candidate_id, $this->_Candidates, true); |
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else: |
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return array_search(trim((string) $candidate_id), $this->_Candidates, false); |
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endif; |
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} |
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public function getCandidateId (int $candidate_key, bool $onlyName = false) |
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{ |
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if (!array_key_exists($candidate_key, $this->_Candidates)) : |
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return false; |
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else : |
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return ($onlyName) ? $this->_Candidates[$candidate_key]->getName() : $this->_Candidates[$candidate_key]; |
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endif; |
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} |
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public function existCandidateId ($candidate_id, bool $strict = true) : bool |
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{ |
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return ($strict) ? in_array($candidate_id, $this->_Candidates, true) : in_array((string) $candidate_id, $this->_Candidates); |
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} |
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public function getCandidateObjectByName (string $s) |
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{ |
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foreach ($this->_Candidates as $oneCandidate) : |
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if ($oneCandidate->getName() === $s) : |
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return $oneCandidate; |
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endif; |
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endforeach; |
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return false; |
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} |
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/////////// ADD & REMOVE CANDIDATE /////////// |
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// Add a vote candidate before voting |
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public function addCandidate ($candidate_id = 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_id) || is_array($candidate_id) || (is_object($candidate_id) && !($candidate_id instanceof Candidate)) ) : |
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throw new CondorcetException(1); |
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endif; |
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// Process |
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if ( empty($candidate_id) ) : |
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while ( !$this->canAddCandidate($this->_i_CandidateId) ) : |
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$this->_i_CandidateId++; |
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endwhile; |
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$newCandidate = new Candidate($this->_i_CandidateId); |
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else : // Try to add the candidate_id |
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$newCandidate = ($candidate_id instanceof Candidate) ? $candidate_id : new Candidate ((string) $candidate_id); |
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if ( !$this->canAddCandidate($newCandidate) ) : |
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throw new CondorcetException(3,$candidate_id); |
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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_id) : bool |
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{ |
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return !$this->existCandidateId($candidate_id, false); |
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} |
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// Destroy a register vote candidate before voting |
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public function removeCandidate ($list) : array |
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{ |
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// only if the vote has not started |
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if ( $this->_State > 1 ) : |
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throw new CondorcetException(2); |
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endif; |
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if ( !is_array($list) ) : |
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$list = [$list]; |
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endif; |
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foreach ($list as &$candidate_id) : |
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$candidate_key = $this->getCandidateKey($candidate_id); |
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if ( $candidate_key === false ) : |
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throw new CondorcetException(4,$candidate_id); |
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endif; |
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$candidate_id = $candidate_key; |
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endforeach; |
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$rem = []; |
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foreach ($list 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 jsonCandidates (string $input) |
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{ |
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$input = CondorcetUtil::prepareJson($input); |
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if ($input === false) : |
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return $input; |
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endif; |
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////// |
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$adding = []; |
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foreach ($input as $candidate) : |
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try { |
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$adding[] = $this->addCandidate($candidate); |
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} |
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catch (CondorcetException $e) { |
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// Ignore invalid vote |
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} |
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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 $allowFile = true) |
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{ |
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$input = CondorcetUtil::prepareParse($input, $allowFile); |
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if ($input === false) : |
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return $input; |
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endif; |
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$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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try { |
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if (self::$_maxParseIteration !== null && count($adding) >= self::$_maxParseIteration) : |
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throw new CondorcetException(12, self::$_maxParseIteration); |
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endif; |
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$adding[] = $this->addCandidate($line); |
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} catch (CondorcetException $e) { |
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throw $e; |
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} |
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endforeach; |
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return $adding; |
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} |
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} |
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