| Index: trunk/extensions/SemanticResultFormats/Math/SRF_Math.php |
| — | — | @@ -0,0 +1,68 @@ |
| | 2 | +<?php |
| | 3 | + |
| | 4 | +/** |
| | 5 | + * Various mathematical functions - sum, average, min and max. |
| | 6 | + * |
| | 7 | + * @file |
| | 8 | + * @ingroup SemanticResultFormats |
| | 9 | + * @author Yaron Koren |
| | 10 | + * @author Nathan Yergler |
| | 11 | + */ |
| | 12 | + |
| | 13 | +if (!defined('MEDIAWIKI')) die(); |
| | 14 | + |
| | 15 | +class SRFMath extends SMWResultPrinter { |
| | 16 | + |
| | 17 | + public function getResult($results, $params, $outputmode) { |
| | 18 | + $this->readParameters($params, $outputmode); |
| | 19 | + return $this->getResultText($results, SMW_OUTPUT_HTML); |
| | 20 | + } |
| | 21 | + |
| | 22 | + protected function getResultText($res, $outputmode) { |
| | 23 | + global $smwgIQRunningNumber, $wgUser; |
| | 24 | + $skin = $wgUser->getSkin(); |
| | 25 | + |
| | 26 | + // initialize all necessary variables |
| | 27 | + $sum = 0; |
| | 28 | + $count = 0; |
| | 29 | + $min = ''; |
| | 30 | + $max = ''; |
| | 31 | + |
| | 32 | + while ( $row = $res->getNext() ) { |
| | 33 | + $last_col = array_pop($row); |
| | 34 | + $number_value = array_pop($last_col->getContent()); |
| | 35 | + // if the property isn't of type Number, just ignore |
| | 36 | + // this row |
| | 37 | + if ( $number_value instanceof SMWNumberValue ) { |
| | 38 | + $count++; |
| | 39 | + $num = $number_value->getNumericValue(); |
| | 40 | + if ($this->mFormat == 'sum' || $this->mFormat == 'average') { |
| | 41 | + $sum += $num; |
| | 42 | + } elseif ($this->mFormat == 'min') { |
| | 43 | + if ($min == '' || $num < $min) |
| | 44 | + $min = $num; |
| | 45 | + } elseif ($this->mFormat == 'max') { |
| | 46 | + if ($max == '' || $num > $max) |
| | 47 | + $max = $num; |
| | 48 | + } |
| | 49 | + } |
| | 50 | + } |
| | 51 | + // if there were no results, display a blank |
| | 52 | + if ($count == 0) { |
| | 53 | + $result = ''; |
| | 54 | + } elseif ($this->mFormat == 'sum') { |
| | 55 | + $result = $sum; |
| | 56 | + } elseif ($this->mFormat == 'average') { |
| | 57 | + $result = $sum / $count; |
| | 58 | + } elseif ($this->mFormat == 'min') { |
| | 59 | + $result = $min; |
| | 60 | + } elseif ($this->mFormat == 'max') { |
| | 61 | + $result = $max; |
| | 62 | + } else { |
| | 63 | + $result = ''; |
| | 64 | + } |
| | 65 | + |
| | 66 | + return array($result, 'noparse' => 'true', 'isHTML' => 'true'); |
| | 67 | + } |
| | 68 | + |
| | 69 | +} |