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<?php |
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declare(strict_types=1); |
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/* (c) Anton Medvedev <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Deployer\Selector; |
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use Deployer\Host\Host; |
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use Deployer\Host\HostCollection; |
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use function Deployer\Support\array_all; |
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class Selector |
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{ |
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/** |
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* @var HostCollection |
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*/ |
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private $hosts; |
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public function __construct(HostCollection $hosts) |
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{ |
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$this->hosts = $hosts; |
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} |
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/** |
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* @return Host[] |
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*/ |
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public function select(string $selectExpression) |
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{ |
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$conditions = self::parse($selectExpression); |
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$hosts = []; |
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foreach ($this->hosts as $host) { |
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if (self::apply($conditions, $host)) { |
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$hosts[] = $host; |
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} |
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} |
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return $hosts; |
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} |
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public static function apply(?array $conditions, Host $host): bool |
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{ |
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if (empty($conditions)) { |
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return true; |
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} |
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$labels = $host->get('labels', []); |
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$labels['alias'] = $host->getAlias(); |
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$labels['true'] = 'true'; |
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$isTrue = function ($value) { |
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return $value; |
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}; |
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foreach ($conditions as $hmm) { |
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$ok = []; |
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foreach ($hmm as [$op, $var, $value]) { |
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if (is_array($value)) { |
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$orOk = []; |
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foreach ($value as $val) { |
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$orOk[] = self::compare($op, $labels[$var] ?? null, $val); |
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} |
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$ok[] = count(array_filter($orOk, $isTrue)) > 0; |
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} else { |
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$ok[] = self::compare($op, $labels[$var] ?? null, $value); |
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} |
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} |
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if (count($ok) > 0 && array_all($ok, $isTrue)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @param string|string[] $a |
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*/ |
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private static function compare(string $op, $a, ?string $b): bool |
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{ |
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$matchFunction = function ($a, ?string $b) { |
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foreach ((array) $a as $item) { |
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if ($item === $b) { |
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return true; |
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} |
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} |
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return false; |
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}; |
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if ($op === '=') { |
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return $matchFunction($a, $b); |
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} |
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if ($op === '!=') { |
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return !$matchFunction($a, $b); |
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} |
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return false; |
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} |
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public static function parse(string $expression): array |
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{ |
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$all = []; |
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foreach (explode(',', $expression) as $sub) { |
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$conditions = []; |
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foreach (explode('&', $sub) as $part) { |
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$part = trim($part); |
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if ($part === 'all') { |
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$conditions[] = ['=', 'true', 'true']; |
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continue; |
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} |
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if (preg_match('/(?<var>.+?)(?<op>!?=)(?<value>.+)/', $part, $match)) { |
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$values = array_map('trim', explode('|', trim($match['value']))); |
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$conditions[] = [$match['op'], trim($match['var']), $values]; |
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} else { |
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$conditions[] = ['=', 'alias', trim($part)]; |
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} |
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} |
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$all[] = $conditions; |
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} |
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return $all; |
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} |
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} |
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deployphp /
deployer
