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<?php |
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/** |
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* Billing Boss |
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* |
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* @link https://github.com/ranskills/billing-boss-php |
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* @copyright Copyright (c) 2018 Ransford Ako Okpoti |
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* @license Refer to the LICENSE distributed with this library |
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* @since 1.0 |
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*/ |
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namespace BillingBoss; |
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final class RangeHelper |
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{ |
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const VALIDATION_NO_RANGE_FOUND = 'NO RANGE FOUND'; |
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const VALIDATION_OK = 'OK'; |
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//todo change to overlapping range |
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const VALIDATION_OVERLAPPING_VALUES = 'OVERLAPPING VALUES'; |
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const VALIDATION_CONFLICT = 'CONFLICT'; |
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public static function validate($str) |
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{ |
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$matches = []; |
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$numMatches = preg_match_all(sprintf('/%s/', Expr::RANGE), $str, $matches); |
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if ($numMatches === 0) { |
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return [self::VALIDATION_NO_RANGE_FOUND, []]; |
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} |
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$numAstericks = substr_count($str, '*'); |
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if ($numAstericks > 1) { |
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return [self::VALIDATION_CONFLICT, []]; |
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} |
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$lowerLimits = $matches[1]; |
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$upperLimits = $matches[2]; |
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$numRanges = count($lowerLimits); |
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$ranges = self::getRangeLimits($str); |
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if (count($ranges) === 0) { |
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return [self::VALIDATION_CONFLICT, []]; |
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} |
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if (self::overlapping($ranges)) { |
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return [self::VALIDATION_OVERLAPPING_VALUES, []]; |
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} |
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return [self::VALIDATION_OK, $ranges]; |
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} |
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private static function overlapping(array $ranges) |
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{ |
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$numRanges = count($ranges); |
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for ($i = 0; $i < $numRanges; $i++) { |
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for ($j = $i + 1; $j < $numRanges; $j++) { |
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$inRange = self::isInRange($ranges[$i], $ranges[$j][0]) || |
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self::isInRange($ranges[$i], $ranges[$j][1]) || |
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self::isInRange($ranges[$j], $ranges[$i][0]) || |
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self::isInRange($ranges[$j], $ranges[$i][1]); |
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if ($inRange) { |
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return true; |
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} |
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} |
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} |
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return false; |
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} |
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public static function getRangeLimits($str) |
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{ |
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$ranges = []; |
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$numMatches = preg_match_all(sprintf('/%s/', Expr::RANGE), $str, $matches); |
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if ($numMatches === 0) { |
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return $ranges; |
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} |
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$lowerLimits = $matches[1]; |
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$upperLimits = $matches[2]; |
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$len = count($lowerLimits); |
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for ($i = 0; $i < $len; $i++) { |
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if (is_numeric($upperLimits[$i]) && floatval($lowerLimits[$i]) > floatval($upperLimits[$i])) { |
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return []; |
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} |
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$ranges[] = [$lowerLimits[$i], $upperLimits[$i]]; |
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} |
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return $ranges; |
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} |
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public static function isInRange(array $range, $value) |
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{ |
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if ($value === '*') { |
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return false; |
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} |
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if (is_numeric($range[1])) { |
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return $value >= $range[0] && $value <= $range[1]; |
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} |
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return $value >= $range[0]; |
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} |
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} |
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ranskills /
billing-boss-php
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