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<?php |
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// --------------------------------------------------------------------- |
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// |
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// Copyright (C) 2018-2024 Artem Rodygin |
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// |
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// You should have received a copy of the MIT License along with |
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// this file. If not, see <https://opensource.org/licenses/MIT>. |
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// |
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// --------------------------------------------------------------------- |
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namespace Linode\Internal; |
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use Symfony\Component\ExpressionLanguage\Node\Node; |
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/** |
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* @internal A query compiler. |
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*/ |
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final class QueryCompiler |
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{ |
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/** |
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* Applies specified parameters to the query. |
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* |
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* @param string $query Query string. |
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* @param array $parameters Query parameters. |
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* |
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* @throws \Exception |
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*/ |
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public function apply(string $query, array $parameters = []): string |
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{ |
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$patterns = []; |
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$replacements = []; |
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foreach ($parameters as $key => $value) { |
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if (!is_scalar($value)) { |
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throw new \Exception(sprintf('Parameter "%s" contains non-scalar value', $key)); |
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} |
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if (is_string($value)) { |
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$value = '"' . $value . '"'; |
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} elseif (is_bool($value)) { |
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$value = $value ? 'true' : 'false'; |
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} |
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$patterns[] = '/(\s|\=|\<|\>|\~)(\:' . $key . ')([^A-Za-z_0-9]|$)/'; |
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$replacements[] = '${1}' . preg_quote($value) . '${3}'; |
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} |
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return preg_replace($patterns, $replacements, $query); |
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} |
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/** |
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* Compiles specified AST node of the query into Linode API filter. |
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* |
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* @return array Filters generated for the node. |
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* |
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* @throws \Exception |
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*/ |
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public function compile(Node $node): array |
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{ |
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$operator = $node->attributes['operator'] ?? null; |
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if (null === $operator) { |
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throw new \Exception('Invalid expression'); |
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} |
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switch ($operator) { |
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case 'and': |
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return ['+and' => [ |
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$this->compile($node->nodes['left']), |
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$this->compile($node->nodes['right']), |
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]]; |
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case 'or': |
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return ['+or' => [ |
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$this->compile($node->nodes['left']), |
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$this->compile($node->nodes['right']), |
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]]; |
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case '==': |
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case '!=': |
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case '<': |
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case '<=': |
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case '>': |
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case '>=': |
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case '~': |
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$name = $node->nodes['left']->attributes['name'] ?? null; |
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$value = $node->nodes['right']->attributes['value'] ?? null; |
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if (null === $name) { |
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throw new \Exception(sprintf('Left operand for the "%s" operator must be a field name', $operator)); |
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} |
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if (null === $value) { |
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throw new \Exception(sprintf('Right operand for the "%s" operator must be a constant value', $operator)); |
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} |
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$operators = [ |
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'!=' => '+neq', |
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'<' => '+lt', |
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'<=' => '+lte', |
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'>' => '+gt', |
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'>=' => '+gte', |
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'~' => '+contains', |
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]; |
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return ('==' === $operator) |
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? [$name => $value] |
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: [$name => [$operators[$operator] => $value]]; |
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default: |
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throw new \Exception(sprintf('Unknown operator "%s"', $operator)); |
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} |
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} |
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} |
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webinarium /
linode-api
