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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\SecurePoll\Ballots; |
| 4 | |
| 5 | use MediaWiki\Extension\SecurePoll\Entities\Option; |
| 6 | use MediaWiki\Extension\SecurePoll\Entities\Question; |
| 7 | use OOUI\FieldsetLayout; |
| 8 | use OOUI\HorizontalLayout; |
| 9 | use OOUI\HtmlSnippet; |
| 10 | use OOUI\LabelWidget; |
| 11 | use OOUI\NumberInputWidget; |
| 12 | |
| 13 | /** |
| 14 | * Ballot for preferential voting |
| 15 | * Properties: |
| 16 | * shuffle-questions |
| 17 | * shuffle-options |
| 18 | * must-rank-all |
| 19 | */ |
| 20 | class PreferentialBallot extends Ballot { |
| 21 | /** @inheritDoc */ |
| 22 | public static function getTallyTypes() { |
| 23 | return [ 'schulze' ]; |
| 24 | } |
| 25 | |
| 26 | /** @inheritDoc */ |
| 27 | public static function getCreateDescriptors() { |
| 28 | $ret = parent::getCreateDescriptors(); |
| 29 | $ret['election'] += [ |
| 30 | 'must-rank-all' => [ |
| 31 | 'label-message' => 'securepoll-create-label-must_rank_all', |
| 32 | 'type' => 'check', |
| 33 | 'hidelabel' => true, |
| 34 | 'SecurePoll_type' => 'property', |
| 35 | ], |
| 36 | ]; |
| 37 | |
| 38 | return $ret; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * @param Question $question |
| 43 | * @param array $options |
| 44 | * @return FieldsetLayout |
| 45 | */ |
| 46 | public function getQuestionForm( $question, $options ) { |
| 47 | $name = 'securepoll_q' . $question->getId(); |
| 48 | $fieldset = new FieldsetLayout(); |
| 49 | foreach ( $options as $option ) { |
| 50 | $optionHTML = $option->parseMessageInline( 'text' ); |
| 51 | $optionId = $option->getId(); |
| 52 | $inputId = "{$name}_opt{$optionId}"; |
| 53 | $oldValue = $this->getRequest()->getVal( $inputId, '' ); |
| 54 | |
| 55 | $widget = new NumberInputWidget( [ |
| 56 | 'name' => $inputId, |
| 57 | 'default' => $oldValue, |
| 58 | 'min' => 1, |
| 59 | 'max' => 999, |
| 60 | 'required' => $this->election->getProperty( 'must-rank-all' ), |
| 61 | ] ); |
| 62 | |
| 63 | $label = new LabelWidget( [ |
| 64 | 'label' => new HtmlSnippet( $this->errorLocationIndicator( $inputId ) . $optionHTML ), |
| 65 | 'input' => $widget, |
| 66 | ] ); |
| 67 | |
| 68 | $fieldset->appendContent( new HorizontalLayout( |
| 69 | [ |
| 70 | 'classes' => [ 'securepoll-option-preferential' ], |
| 71 | 'items' => [ |
| 72 | $widget, |
| 73 | $label, |
| 74 | ], |
| 75 | ] |
| 76 | ) ); |
| 77 | } |
| 78 | |
| 79 | return $fieldset; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * @param Question $question |
| 84 | * @param BallotStatus $status |
| 85 | * @return string |
| 86 | */ |
| 87 | public function submitQuestion( $question, $status ) { |
| 88 | $options = $question->getOptions(); |
| 89 | $record = ''; |
| 90 | $ok = true; |
| 91 | foreach ( $options as $option ) { |
| 92 | $id = 'securepoll_q' . $question->getId() . '_opt' . $option->getId(); |
| 93 | $rank = $this->getRequest()->getVal( $id ); |
| 94 | |
| 95 | if ( is_numeric( $rank ) ) { |
| 96 | if ( $rank <= 0 || $rank >= 1000 ) { |
| 97 | $status->spFatal( 'securepoll-invalid-rank', $id, false ); |
| 98 | $ok = false; |
| 99 | continue; |
| 100 | } else { |
| 101 | $rank = intval( $rank ); |
| 102 | } |
| 103 | } elseif ( strval( $rank ) === '' ) { |
| 104 | if ( $this->election->getProperty( 'must-rank-all' ) ) { |
| 105 | $status->spFatal( 'securepoll-unranked-options', $id, false ); |
| 106 | $ok = false; |
| 107 | continue; |
| 108 | } else { |
| 109 | $rank = 1000; |
| 110 | } |
| 111 | } else { |
| 112 | $status->spFatal( 'securepoll-invalid-rank', $id, false ); |
| 113 | $ok = false; |
| 114 | continue; |
| 115 | } |
| 116 | $record .= $this->packRecord( $question, $option, $rank ); |
| 117 | } |
| 118 | if ( $ok ) { |
| 119 | return $record; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * @param Question $question |
| 125 | * @param Option $option |
| 126 | * @param int $rank |
| 127 | * @return string |
| 128 | */ |
| 129 | public function packRecord( $question, $option, $rank ) { |
| 130 | return sprintf( |
| 131 | 'Q%08X-A%08X-R%08X--', |
| 132 | $question->getId(), |
| 133 | $option->getId(), |
| 134 | $rank |
| 135 | ); |
| 136 | } |
| 137 | |
| 138 | /** @inheritDoc */ |
| 139 | public function unpackRecord( $record ) { |
| 140 | $ranks = []; |
| 141 | $itemLength = 3 * 8 + 7; |
| 142 | for ( $offset = 0, $len = strlen( $record ); $offset < $len; $offset += $itemLength ) { |
| 143 | if ( !preg_match( |
| 144 | '/Q([0-9A-F]{8})-A([0-9A-F]{8})-R([0-9A-F]{8})--/A', |
| 145 | $record, |
| 146 | $m, |
| 147 | 0, |
| 148 | $offset |
| 149 | ) |
| 150 | ) { |
| 151 | wfDebug( __METHOD__ . ": regex doesn't match\n" ); |
| 152 | |
| 153 | return false; |
| 154 | } |
| 155 | $qid = intval( base_convert( $m[1], 16, 10 ) ); |
| 156 | $oid = intval( base_convert( $m[2], 16, 10 ) ); |
| 157 | $rank = intval( base_convert( $m[3], 16, 10 ) ); |
| 158 | $ranks[$qid][$oid] = $rank; |
| 159 | } |
| 160 | |
| 161 | return $ranks; |
| 162 | } |
| 163 | |
| 164 | /** @inheritDoc */ |
| 165 | public function convertScores( $scores, $params = [] ) { |
| 166 | $result = []; |
| 167 | foreach ( $this->election->getQuestions() as $question ) { |
| 168 | $qid = $question->getId(); |
| 169 | if ( !isset( $scores[$qid] ) ) { |
| 170 | return false; |
| 171 | } |
| 172 | $s = ''; |
| 173 | $qscores = $scores[$qid]; |
| 174 | ksort( $qscores ); |
| 175 | $first = true; |
| 176 | foreach ( $qscores as $rank ) { |
| 177 | if ( $first ) { |
| 178 | $first = false; |
| 179 | } else { |
| 180 | $s .= ', '; |
| 181 | } |
| 182 | if ( $rank == 1000 ) { |
| 183 | $s .= '-'; |
| 184 | } else { |
| 185 | $s .= $rank; |
| 186 | } |
| 187 | } |
| 188 | $result[$qid] = $s; |
| 189 | } |
| 190 | |
| 191 | return $result; |
| 192 | } |
| 193 | } |