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<?php |
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namespace Lagdo\DbAdmin\Driver\MySql\Db\Traits; |
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use Lagdo\DbAdmin\Driver\Entity\ForeignKeyEntity; |
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use Lagdo\DbAdmin\Driver\Entity\TableEntity; |
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use Lagdo\DbAdmin\Driver\Entity\TableFieldEntity; |
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use function array_pad; |
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use function array_map; |
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use function preg_match; |
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use function preg_match_all; |
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trait TableTrait |
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{ |
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abstract public function tableStatuses(bool $fast = false); |
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abstract public function fields(string $table); |
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/** |
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* @inheritDoc |
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*/ |
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public function supportForeignKeys(TableEntity $tableStatus) |
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{ |
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return preg_match('~InnoDB|IBMDB2I~i', $tableStatus->engine ?? '') |
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|| (preg_match('~NDB~i', $tableStatus->engine ?? '') && $this->driver->minVersion(5.6)); |
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} |
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/** |
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* @param string $tableName |
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* |
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* @return TableFieldEntity|null |
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*/ |
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private function getTablePrimaryKeyField(string $tableName) |
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{ |
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$pkField = null; |
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foreach ($this->fields($tableName) as $field) { |
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if ($field->primary) { |
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if ($pkField !== null) { |
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// No multi column primary key |
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return null; |
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} |
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$pkField = $field; |
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} |
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} |
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return $pkField; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function referencableTables(string $table) |
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{ |
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$fields = []; // table_name => [field] |
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foreach ($this->tableStatuses(true) as $tableName => $tableStatus) { |
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if ($tableName !== $table && $this->supportForeignKeys($tableStatus) && |
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($field = $this->getTablePrimaryKeyField($tableName)) !== null) { |
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$fields[$tableName] = $field; |
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} |
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} |
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return $fields; |
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} |
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/** |
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* @param array $match |
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* |
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* @return ForeignKeyEntity |
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*/ |
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private function makeTableForeignKey(array $match): ForeignKeyEntity |
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{ |
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$match = array_pad($match, 8, ''); |
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$pattern = '(?:`(?:[^`]|``)+`|"(?:[^"]|"")+")'; |
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preg_match_all("~$pattern~", $match[2], $source); |
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preg_match_all("~$pattern~", $match[5], $target); |
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$foreignKey = new ForeignKeyEntity(); |
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$foreignKey->database = $this->driver->unescapeId($match[4] != "" ? $match[3] : $match[4]); |
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$foreignKey->table = $this->driver->unescapeId($match[4] != "" ? $match[4] : $match[3]); |
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$foreignKey->source = array_map(function ($idf) { |
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return $this->driver->unescapeId($idf); |
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}, $source[0]); |
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$foreignKey->target = array_map(function ($idf) { |
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return $this->driver->unescapeId($idf); |
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}, $target[0]); |
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$foreignKey->onDelete = $match[6] ?: "RESTRICT"; |
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$foreignKey->onUpdate = $match[7] ?: "RESTRICT"; |
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return $foreignKey; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function foreignKeys(string $table) |
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{ |
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static $pattern = '(?:`(?:[^`]|``)+`|"(?:[^"]|"")+")'; |
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$foreignKeys = []; |
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$onActions = $this->driver->actions(); |
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$createTable = $this->driver->result("SHOW CREATE TABLE " . $this->driver->escapeTableName($table), 1); |
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if ($createTable) { |
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preg_match_all("~CONSTRAINT ($pattern) FOREIGN KEY ?\\(((?:$pattern,? ?)+)\\) REFERENCES " . |
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"($pattern)(?:\\.($pattern))? \\(((?:$pattern,? ?)+)\\)(?: ON DELETE ($onActions))" . |
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"?(?: ON UPDATE ($onActions))?~", $createTable, $matches, PREG_SET_ORDER); |
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foreach ($matches as $match) { |
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$foreignKeys[$this->driver->unescapeId($match[1])] = $this->makeTableForeignKey($match); |
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} |
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} |
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return $foreignKeys; |
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} |
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} |
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lagdo /
dbadmin-driver-mysql
