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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\SecurePoll\Ballots; |
| 4 | |
| 5 | use MediaWiki\Extension\SecurePoll\Entities\Question; |
| 6 | |
| 7 | /** |
| 8 | * Ballot for preferential voting |
| 9 | * Properties: |
| 10 | * shuffle-questions |
| 11 | * shuffle-options |
| 12 | * must-rank-all |
| 13 | */ |
| 14 | class PreferentialBallot extends Ballot { |
| 15 | public static function getTallyTypes() { |
| 16 | return [ 'schulze' ]; |
| 17 | } |
| 18 | |
| 19 | public static function getCreateDescriptors() { |
| 20 | $ret = parent::getCreateDescriptors(); |
| 21 | $ret['election'] += [ |
| 22 | 'must-rank-all' => [ |
| 23 | 'label-message' => 'securepoll-create-label-must_rank_all', |
| 24 | 'type' => 'check', |
| 25 | 'hidelabel' => true, |
| 26 | 'SecurePoll_type' => 'property', |
| 27 | ], |
| 28 | ]; |
| 29 | |
| 30 | return $ret; |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * @param Question $question |
| 35 | * @param array $options |
| 36 | * @return \OOUI\FieldsetLayout |
| 37 | */ |
| 38 | public function getQuestionForm( $question, $options ) { |
| 39 | $name = 'securepoll_q' . $question->getId(); |
| 40 | $fieldset = new \OOUI\FieldsetLayout(); |
| 41 | foreach ( $options as $option ) { |
| 42 | $optionHTML = $option->parseMessageInline( 'text' ); |
| 43 | $optionId = $option->getId(); |
| 44 | $inputId = "{$name}_opt{$optionId}"; |
| 45 | $oldValue = $this->getRequest()->getVal( $inputId, '' ); |
| 46 | |
| 47 | $widget = new \OOUI\NumberInputWidget( [ |
| 48 | 'name' => $inputId, |
| 49 | 'default' => $oldValue, |
| 50 | 'min' => 1, |
| 51 | 'max' => 999, |
| 52 | 'required' => $this->election->getProperty( 'must-rank-all' ), |
| 53 | ] ); |
| 54 | |
| 55 | $label = new \OOUI\LabelWidget( [ |
| 56 | 'label' => new \OOUI\HtmlSnippet( $this->errorLocationIndicator( $inputId ) . $optionHTML ), |
| 57 | 'input' => $widget, |
| 58 | ] ); |
| 59 | |
| 60 | $fieldset->appendContent( new \OOUI\HorizontalLayout( |
| 61 | [ |
| 62 | 'classes' => [ 'securepoll-option-preferential' ], |
| 63 | 'items' => [ |
| 64 | $widget, |
| 65 | $label, |
| 66 | ], |
| 67 | ] |
| 68 | ) ); |
| 69 | } |
| 70 | |
| 71 | return $fieldset; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * @param Question $question |
| 76 | * @param BallotStatus $status |
| 77 | * @return string |
| 78 | */ |
| 79 | public function submitQuestion( $question, $status ) { |
| 80 | $options = $question->getOptions(); |
| 81 | $record = ''; |
| 82 | $ok = true; |
| 83 | foreach ( $options as $option ) { |
| 84 | $id = 'securepoll_q' . $question->getId() . '_opt' . $option->getId(); |
| 85 | $rank = $this->getRequest()->getVal( $id ); |
| 86 | |
| 87 | if ( is_numeric( $rank ) ) { |
| 88 | if ( $rank <= 0 || $rank >= 1000 ) { |
| 89 | $status->spFatal( 'securepoll-invalid-rank', $id, false ); |
| 90 | $ok = false; |
| 91 | continue; |
| 92 | } else { |
| 93 | $rank = intval( $rank ); |
| 94 | } |
| 95 | } elseif ( strval( $rank ) === '' ) { |
| 96 | if ( $this->election->getProperty( 'must-rank-all' ) ) { |
| 97 | $status->spFatal( 'securepoll-unranked-options', $id, false ); |
| 98 | $ok = false; |
| 99 | continue; |
| 100 | } else { |
| 101 | $rank = 1000; |
| 102 | } |
| 103 | } else { |
| 104 | $status->spFatal( 'securepoll-invalid-rank', $id, false ); |
| 105 | $ok = false; |
| 106 | continue; |
| 107 | } |
| 108 | $record .= $this->packRecord( $question, $option, $rank ); |
| 109 | } |
| 110 | if ( $ok ) { |
| 111 | return $record; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | public function packRecord( $question, $option, $rank ) { |
| 116 | return sprintf( |
| 117 | 'Q%08X-A%08X-R%08X--', |
| 118 | $question->getId(), |
| 119 | $option->getId(), |
| 120 | $rank |
| 121 | ); |
| 122 | } |
| 123 | |
| 124 | public function unpackRecord( $record ) { |
| 125 | $ranks = []; |
| 126 | $itemLength = 3 * 8 + 7; |
| 127 | for ( $offset = 0, $len = strlen( $record ); $offset < $len; $offset += $itemLength ) { |
| 128 | if ( !preg_match( |
| 129 | '/Q([0-9A-F]{8})-A([0-9A-F]{8})-R([0-9A-F]{8})--/A', |
| 130 | $record, |
| 131 | $m, |
| 132 | 0, |
| 133 | $offset |
| 134 | ) |
| 135 | ) { |
| 136 | wfDebug( __METHOD__ . ": regex doesn't match\n" ); |
| 137 | |
| 138 | return false; |
| 139 | } |
| 140 | $qid = intval( base_convert( $m[1], 16, 10 ) ); |
| 141 | $oid = intval( base_convert( $m[2], 16, 10 ) ); |
| 142 | $rank = intval( base_convert( $m[3], 16, 10 ) ); |
| 143 | $ranks[$qid][$oid] = $rank; |
| 144 | } |
| 145 | |
| 146 | return $ranks; |
| 147 | } |
| 148 | |
| 149 | public function convertScores( $scores, $params = [] ) { |
| 150 | $result = []; |
| 151 | foreach ( $this->election->getQuestions() as $question ) { |
| 152 | $qid = $question->getId(); |
| 153 | if ( !isset( $scores[$qid] ) ) { |
| 154 | return false; |
| 155 | } |
| 156 | $s = ''; |
| 157 | $qscores = $scores[$qid]; |
| 158 | ksort( $qscores ); |
| 159 | $first = true; |
| 160 | foreach ( $qscores as $rank ) { |
| 161 | if ( $first ) { |
| 162 | $first = false; |
| 163 | } else { |
| 164 | $s .= ', '; |
| 165 | } |
| 166 | if ( $rank == 1000 ) { |
| 167 | $s .= '-'; |
| 168 | } else { |
| 169 | $s .= $rank; |
| 170 | } |
| 171 | } |
| 172 | $result[$qid] = $s; |
| 173 | } |
| 174 | |
| 175 | return $result; |
| 176 | } |
| 177 | } |