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<?php |
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namespace SimpleCrud\Scheme; |
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use SimpleCrud\SimpleCrud; |
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/** |
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* Base class used by all queries. |
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*/ |
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abstract class Scheme |
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{ |
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const HAS_ONE = 1; |
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const HAS_MANY = 2; |
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const HAS_MANY_TO_MANY = 4; |
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protected $db; |
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/** |
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* Constructor. |
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* |
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* @param SimpleCrud $db |
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*/ |
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public function __construct(SimpleCrud $db) |
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{ |
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$this->db = $db; |
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} |
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/** |
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* Return the database scheme. |
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* |
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* @return array |
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*/ |
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public function __invoke() |
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{ |
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$scheme = []; |
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foreach ($this->getTables() as $table) { |
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$scheme[$table] = [ |
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'fields' => $this->getTableFields($table), |
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'relations' => [], |
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]; |
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} |
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foreach ($scheme as $table => &$info) { |
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$foreingKey = "{$table}_id"; |
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foreach ($scheme as $relTable => &$relInfo) { |
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if (isset($relInfo['fields'][$foreingKey])) { |
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$info['relations'][$relTable] = [self::HAS_MANY, $foreingKey]; |
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$relInfo['relations'][$table] = [self::HAS_ONE, $foreingKey]; |
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continue; |
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} |
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if ($table < $relTable) { |
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$bridge = "{$table}_{$relTable}"; |
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} else { |
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$bridge = "{$relTable}_{$table}"; |
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} |
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if (isset($scheme[$bridge])) { |
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$relForeingKey = "{$relTable}_id"; |
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if (isset($scheme[$bridge]['fields'][$foreingKey]) && isset($scheme[$bridge]['fields'][$relForeingKey])) { |
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$info['relations'][$relTable] = [self::HAS_MANY_TO_MANY, $bridge, $foreingKey, $relForeingKey]; |
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$relInfo['relations'][$table] = [self::HAS_MANY_TO_MANY, $bridge, $relForeingKey, $foreingKey]; |
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} |
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} |
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} |
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} |
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return $scheme; |
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} |
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/** |
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* Return all tables. |
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* |
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* @return array |
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*/ |
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abstract protected function getTables(); |
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/** |
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* Return the scheme of a table. |
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* |
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* @param string $table |
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* |
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* @return array |
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*/ |
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abstract protected function getTableFields($table); |
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} |
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oscarotero /
simple-crud
