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<?php |
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/** |
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* @package Cadmium\Framework\DB |
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* @author Anton Romanov |
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* @copyright Copyright (c) 2015-2017, Anton Romanov |
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* @link http://cadmium-cms.com |
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*/ |
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namespace DB { |
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use Type; |
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abstract class Query { |
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protected $query = ''; |
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/** |
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* Get a field/table name |
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*/ |
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protected function getName(string $name) : string { |
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return preg_replace('/[^a-zA-Z0-9_]/', '_', trim($name)); |
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} |
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/** |
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* Get a field value |
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*/ |
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protected function getValue(string $value) : string { |
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return ('\'' . addslashes($value) . '\''); |
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} |
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/** |
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* Get a range of values |
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*/ |
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protected function getRange(array $value) : string { |
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$parser = function ($value) { if (is_scalar($value)) return $this->getValue($value); }; |
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return ('(' . implode(', ', array_filter(array_map($parser, $value))) . ')'); |
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} |
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/** |
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* Get an operatable value (value with an operator) |
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*/ |
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protected function getOperatable($value) { |
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if (is_scalar($value)) return ('= ' . $this->getValue($value)); |
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if (is_array($value)) return ('IN ' . $this->getRange($value)); |
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if ($value instanceof Type\Not) return ('NOT ' . $this->getValue($value->get())); |
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if ($value instanceof Type\Like) return ('LIKE ' . $this->getValue($value->get())); |
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if ($value instanceof Type\LessThan) return ('< ' . $value->get()); |
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if ($value instanceof Type\GreaterThan) return ('> ' . $value->get()); |
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if ($value instanceof Type\LessThanOrEqual) return ('<= ' . $value->get()); |
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if ($value instanceof Type\GreaterThanOrEqual) return ('>= ' . $value->get()); |
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# ------------------------ |
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return ''; |
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} |
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/** |
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* Get a field sorting direction |
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*/ |
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protected function getDirection(string $direction) : string { |
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return ((strtoupper($direction) !== 'DESC') ? 'ASC' : 'DESC'); |
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} |
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/** |
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* Convert a data array to a string |
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*/ |
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protected function getString($source = null, string $pattern = '', string $separator = '') : string { |
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if (!is_array($source)) return (is_scalar($source) ? strval($source) : ''); |
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$regexs = ['key' => '/\^([a-z]+)/', 'value' => '/\$([a-z]+)/']; $matches = ['key' => [], 'value' => []]; |
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$parsers = ['name' => 'getName', 'value' => 'getValue', 'range' => 'getRange', |
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'operatable' => 'getOperatable', 'direction' => 'getDirection']; |
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$output = []; $count = 0; |
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# Parse pattern |
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foreach ($regexs as $name => $regex) preg_match($regex, $pattern, $matches[$name]); |
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# Process replacements |
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foreach ($source as $key => $value) { |
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$output[$count] = $pattern; $item = &$output[$count++]; |
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foreach ($matches as $name => $match) if (isset($match[1]) && isset($parsers[$match[1]])) { |
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try { $replace = [$this, $parsers[$match[1]]]($$name); } catch (\TypeError $e) { $replace = ''; } |
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$item = str_replace($match[0], $replace, $item); |
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} |
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} |
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# ------------------------ |
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return implode($separator, $output); |
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} |
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/** |
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* Convert the object to a string |
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*/ |
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public function __toString() : string { |
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return $this->query; |
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} |
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} |
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} |
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cadmium-org /
cadmium-cms
