diff options
Diffstat (limited to 'http/api-inc.php')
| -rw-r--r-- | http/api-inc.php | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/http/api-inc.php b/http/api-inc.php new file mode 100644 index 0000000..64612d9 --- /dev/null +++ b/http/api-inc.php @@ -0,0 +1,220 @@ +<?php + +if (!function_exists('http_response_code')) { + function http_response_code($code = NULL) { + $codes = array(400 => "Bad Request", + 500 => "Internal Server Error"); + if (!isset($codes[$code])) { + return; + } + $protocol = (isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0'); + header($protocol . ' ' . $code . ' ' . $codes[$code]); + } +} + +function safe_ceil($value, $precision = 1e-6) { + $ceilValue = ceil($value); + return (abs($value - $ceilValue) < (1-$precision)) ? $ceilValue : round($value); +} + +function recursive_ksort(&$array, $flags = SORT_REGULAR) { + if (!is_array($array)) return false; + ksort($array, $flags); + foreach ($array as &$arr) { + recursive_ksort($arr, $flags); + } + return true; +} + +class ParametersException extends Exception {}; + +class ApiPkl { + + const RANK_KMP = 101; + + protected $parameters; + + function __construct($parameters) { + $this->parameters = $parameters; + $this->check_parameters($parameters); + $this->parameters = $this->parse_parameters($parameters); + } + + function ensure_parameters($params) { + foreach ($params as $param) { + if (!isset($this->parameters[$param])) { + throw new ParametersException('Missing parameter: ' . $param); + } + if (!is_numeric($this->parameters[$param])) { + throw new ParametersException('Parameter: ' . $param . ' is not a numeric value (' . $this->parameters[$param] . ')'); + } + } + } + + function check_values($parameters, $params) { + foreach ($params as $param => $test) { + if (!$test($parameters[$param])) { + throw new ParametersException('Parameter: ' . $param . ' has incorrect value (' . $parameters[$param] . ')'); + } + } + } + + function check_parameters() { + $this->ensure_parameters(array('type', 'contestants', 'title_sum')); + $this->check_values($this->parameters, array( + 'type' => function($r) { return ctype_digit($r) && intval($r) > 0; }, + 'contestants' => function($r) { return ctype_digit($r) && intval($r) > 0; }, + 'title_sum' => function($r) { return floatval($r) >= 0; } + )); + if (isset($this->parameters['players'])) { + $this->check_values($this->parameters, array( + 'players' => function($r) { return ctype_digit($r) && intval($r) > 0; } + )); + } + if (!isset($this->parameters['manual']) || !isset($this->parameters['manual']['min_points']) || !isset($this->parameters['manual']['tournament_weight'])) { + $this->ensure_parameters(array('tournament_rank', 'over39_boards')); + $this->check_values($this->parameters, array( + 'tournament_rank' => function($r) { return ctype_digit($r) && ((intval($r) >= 0 && intval($r) <= 7) || intval($r) == self::RANK_KMP); }, + 'over39_boards' => function($r) { return ctype_digit($r) && intval($r) >= 0 && intval($r) <= 1; } + )); + } else { + $this->check_values($this->parameters['manual'], array( + 'min_points' => function($r) { return ctype_digit($r) && intval($r) >= 0; }, + 'tournament_weight' => function($r) { return ctype_digit($r) && intval($r) > 0; } + )); + } + if (isset($this->parameters['manual']) && isset($this->parameters['manual']['players_coefficient'])) { + $this->check_values($this->parameters['manual'], array( + 'players_coefficient' => function($r) { return floatval($r) >= 0; } + )); + } + } + + function parse_parameters() { + $return = array(); + $return['type'] = intval($this->parameters['type']); + if ($return['type'] == 3 || $return['type'] > 4) { + throw new ParametersException('Parameter: type has incorrect value (' . $return['type'] . ')'); + } + if ($return['type'] != 2 && $this->parameters['tournament_rank'] == self::RANK_KMP) { + throw new ParametersException('Parameter: type has incorrect value (' . $return['type'] . ') for KMP tournament'); + } + $return['contestants'] = intval($this->parameters['contestants']); + $return['players'] = isset($this->parameters['players']) ? intval($this->parameters['players']) : intval($this->parameters['contestants']) * $return['type']; + $return['title_sum'] = floatval($this->parameters['title_sum']); + $weights = array( + array(1, 2, 4, 5, 7, 10, 15, 25, self::RANK_KMP => 0), + array(2, 3, 5, 7, 10, 15, 25, 40, self::RANK_KMP => 0) + ); + $return['tournament_weight'] = (isset($this->parameters['manual']) && isset($this->parameters['manual']['tournament_weight'])) ? intval($this->parameters['manual']['tournament_weight']) : $weights[intval($this->parameters['over39_boards'])][intval($this->parameters['tournament_rank'])]; + $min_points = array( + array(0, 0, 0, 0, 50, 75, 150, 200, self::RANK_KMP => 0), + array(0, 0, 0, 0, 70, 100, 200, 300, self::RANK_KMP => 0) + ); + $return['min_points'] = (isset($this->parameters['manual']) && isset($this->parameters['manual']['min_points'])) ? intval($this->parameters['manual']['min_points']) : $min_points[intval($this->parameters['over39_boards'])][intval($this->parameters['tournament_rank'])]; + $return['players_coefficient'] = (isset($this->parameters['manual']) && isset($this->parameters['manual']['players_coefficient'])) ? floatval($this->parameters['manual']['players_coefficient']) : 0.05; + $return['points_cutoffs'] = (isset($this->parameters['manual']) && isset($this->parameters['manual']['points_cutoffs']) && is_array($this->parameters['manual']['points_cutoffs'])) ? $this->parameters['manual']['points_cutoffs'] : array( + array(0.0, 1.0), + array(0.02, 0.9), + array(0.2, 0.2), + array(0.5, 0.0) + ); + recursive_ksort($return['points_cutoffs']); + if ($return['points_cutoffs'][0][0] != 0.0) { + array_unshift($return['points_cutoffs'], array(0.0, 1.0)); + } + if ($return['points_cutoffs'][count($return['points_cutoffs'])-1][1] != 0.0) { + array_push($return['points_cutoffs'], array(1.0, 0.0)); + } + foreach ($return['points_cutoffs'] as &$cutoff) { + if (($cutoff[0] < 0.0) || ($cutoff[0] > 1.0)) { + throw new ParametersException('Cutoff points need to be between 0.0 and 1.0: ' . $cutoff[0]); + } + $cutoff[0] = floatval($cutoff[0]); + if (($cutoff[1] < 0.0) || ($cutoff[1] > 1.0)) { + throw new ParametersException('Cutoff values need to be between 1.0 and 0.0: ' . $cutoff[1]); + } + $cutoff[1] = floatval($cutoff[1]); + } + unset($cutoff); + for ($prev = 0; $prev < count($return['points_cutoffs']) - 1; $prev++) { + $next = $prev + 1; + if ($return['points_cutoffs'][$prev][0] >= $return['points_cutoffs'][$next][0]) { + throw new ParametersException( + 'Cutoff points need to be ascending: ' . $return['points_cutoffs'][$prev][0] . ', ' . $return['points_cutoffs'][$next][0]); + } + if ($return['points_cutoffs'][$prev][1] < $return['points_cutoffs'][$next][1]) { + throw new ParametersException( + 'Cutoff values need to be non-ascending: ' . $return['points_cutoffs'][$prev][1] . ', ' . $return['points_cutoffs'][$next][1]); + } + } + return $return; + } + + function get_position_percentage_from_position($position, $contestants) { + return ($position - 1) / $contestants; + } + + function get_percentage_from_position($position, $contestants, $cutoffs) { + $position_percentage = $this->get_position_percentage_from_position($position, $contestants); + for ($prev = 0; $prev < count($cutoffs) - 1; $prev++) { + $next = $prev + 1; + if (($cutoffs[$prev][0] <= $position_percentage) && ($cutoffs[$next][0] >= $position_percentage)) { + $result = ($position_percentage - $cutoffs[$prev][0]) * ($cutoffs[$prev][1] - $cutoffs[$next][1]) / ($cutoffs[$prev][0] - $cutoffs[$next][0]) + $cutoffs[$prev][1]; + return $result; + } + } + return 0.0; + } + + function calculate_points() { + $max_points = safe_ceil(max( + $this->parameters['min_points'], + (1 + 0.25 * ($this->parameters['type'] > 2)) * (max(0.15, $this->parameters['title_sum'] / $this->parameters['players']) * $this->parameters['tournament_weight'] + $this->parameters['players_coefficient'] * $this->parameters['contestants'] * $this->parameters['type']) + )); + $min_points = 1; + $result = array("sum" => 0, "points" => array()); + for ($place = 1; $place <= $this->parameters['contestants']; $place++) { + $percentage = $this->get_percentage_from_position($place, $this->parameters['contestants'], $this->parameters['points_cutoffs']); + $points = safe_ceil(floatval($max_points) * $percentage); + $result['points'][$place] = max($min_points, intval($points)); + $result['sum'] += $this->parameters['type'] * $result['points'][$place]; + } + return $result; + } + + function calculate_kmp_points() { + $max_points = safe_ceil($this->parameters['contestants'] * 0.5); + $min_points = 1; + $result = array("sum" => 0, "points" => array(1 => $max_points)); + for ($place = 2; $place <= $this->parameters['contestants']; $place++) { + $result['points'][$place] = max($min_points, $result['points'][$place-1]-1); + $result['sum'] += $this->parameters['type'] * $result['points'][$place]; + } + if ($this->parameters['title_sum'] / $this->parameters['players'] >= 2.5) { + $result['points'][1] += 5; + $result['points'][2] += 3; + $result['points'][3] += 1; + $result['sum'] += $this->parameters['type'] * 8; + } + return $result; + } +} + +class ApiPklV1 extends ApiPkl {} + +class ApiPklV2 extends ApiPklV1 { + + function calculate_kmp_points() { + // the line below works only because you can't play > 39 boards in KMP + // please kill me if it ever changes + $this->parameters['tournament_weight'] = 4; + $this->parameters['min_points'] = 0; + $intermediate = $this->calculate_points(); + $this->parameters['min_points'] = $intermediate['points'][1] + 10; + return $this->calculate_points(); + } + +} + +?> |