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<?php
/**
* @package Gantry5
* @author RocketTheme http://www.rockettheme.com
* @copyright Copyright (C) 2007 - 2021 RocketTheme, LLC
* @license Dual License: MIT or GNU/GPLv2 and later
*
* http://opensource.org/licenses/MIT
* http://www.gnu.org/licenses/gpl-2.0.html
*
* Gantry Framework code that extends GPL code is considered GNU/GPLv2 and later
*/
namespace Gantry\Component\Assignments;
/**
* Class AssignmentFilter
* @package Gantry\Assignments
*/
class AssignmentFilter
{
protected $method;
/**
* Return all matching candidates with their score. Candidates are ordered by their scores.
*
* @param array $candidates In format of candidates[name][section][rule].
* @param array $page In format of page[section][rule].
* @param callable|null $function Matching function.
* @return array
*/
public function scores(array &$candidates, array &$page, callable $function = null)
{
$matches = $this->matches($candidates, $page, $function);
$scores = [];
foreach ($matches as $type => $candidate) {
$scores[$type] = $this->getScore($candidate) + (isset($candidate['language']) ? 0.01 : 0);
}
// Always return matches by score in alphabetical order.
ksort($scores, SORT_STRING);
arsort($scores, SORT_NUMERIC);
return $scores;
}
/**
* Returns all matching candidates with matching rules.
*
* @param array $candidates In format of candidates[name][section][rule].
* @param array $page In format of page[section][rule].
* @param callable|null $function Matching function.
* @return array
*/
public function matches(array $candidates, array &$page, callable $function = null)
{
$matches = [];
foreach ($candidates as $type => $candidate) {
if (!is_array($candidate)) {
if ($candidate === true && $page) {
$matches[$type] = $page;
}
continue;
}
foreach ($candidate as $section => $list) {
if (!is_array($list)) {
if ($list === true && !empty($page[$section])) {
$matches[$type][$section] = $page[$section];
}
continue;
}
foreach ($list as $name => $rules) {
if (!empty($page[$section][$name])) {
if (!is_array($rules)) {
$match = $rules === true ? $page[$section][$name] : [];
} else {
$match = \array_intersect_key($page[$section][$name], $rules);
}
if ($match) {
$matches[$type][$section][$name] = $match;
}
}
}
}
if (isset($matches[$type]) && $function && $function($candidate, $matches[$type], $page) === false) {
unset($matches[$type]);
}
}
return $matches;
}
/**
* Returns the calculated score for the assignment.
*
* @param array $matches
* @param string $method
* @return float
*/
public function getScore(array &$matches, $method = 'max')
{
$this->method = 'calc' . ucfirst($method);
if (!method_exists($this, $this->method)) {
$this->method = 'calcMax';
}
return $this->calcArray(0, $matches);
}
/**
* @param float $carry
* @param float|array $item
* @return float
* @internal
*/
protected function calcArray($carry, $item)
{
if (is_array($item)) {
return array_reduce($item, [$this, 'calcArray'], $carry);
}
$method = $this->method;
return $this->{$method}($carry, (float) $item);
}
/**
* @param float $carry
* @param float $item
* @return float
* @internal
*/
protected function calcOr($carry, $item)
{
return (float) ($carry || $item);
}
/**
* @param float $carry
* @param float $item
* @return float
* @internal
*/
protected function calcMin($carry, $item)
{
return $carry ? min($carry, $item) : $item;
}
/**
* @param float $carry
* @param float $item
* @return float
* @internal
*/
protected function calcMax($carry, $item)
{
return max($carry, $item);
}
/**
* @param float $carry
* @param float $item
* @return float
* @internal
*/
protected function calcSum($carry, $item)
{
return $carry + $item;
}
/**
* @param float $carry
* @param float $item
* @return float
* @internal
*/
protected function calcMul($carry, $item)
{
return $carry ? $carry * $item : $item;
}
}