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<?php |
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namespace HexMakina\Crudites; |
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use HexMakina\Crudites\Queries\Select; |
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use HexMakina\Crudites\Queries\Describe; |
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use HexMakina\Crudites\Table\Manipulation; |
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use HexMakina\Crudites\Table\Column; |
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use HexMakina\BlackBox\Database\ConnectionInterface; |
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use HexMakina\BlackBox\Database\DatabaseInterface; |
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use HexMakina\BlackBox\Database\TableManipulationInterface; |
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class Database implements DatabaseInterface |
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{ |
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private $connection = null; |
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private $table_cache = []; |
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private $fk_by_table = []; |
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private $unique_by_table = []; |
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public function __construct(ConnectionInterface $connection) |
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{ |
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$this->connection = $connection; |
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$this->introspect(); |
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} |
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public function name() |
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{ |
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return $this->connection()->databaseName(); |
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} |
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public function connection(): ConnectionInterface |
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{ |
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return $this->connection; |
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} |
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public function introspect() |
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{ |
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$fields = [ |
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'TABLE_NAME', |
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'CONSTRAINT_NAME', |
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'ORDINAL_POSITION', |
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'COLUMN_NAME', |
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'POSITION_IN_UNIQUE_CONSTRAINT', |
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'REFERENCED_TABLE_NAME', |
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'REFERENCED_COLUMN_NAME' |
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]; |
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$statement = 'SELECT ' . implode(', ', $fields) |
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. ' FROM KEY_COLUMN_USAGE' |
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. ' WHERE TABLE_SCHEMA = "%s"' |
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. ' ORDER BY TABLE_NAME, CONSTRAINT_NAME, ORDINAL_POSITION'; |
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$this->connection->useDatabase('INFORMATION_SCHEMA'); |
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$res = $this->connection->query(sprintf($statement, $this->name()))->fetchAll(); |
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$this->connection->useDatabase($this->name()); |
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foreach ($res as $key_usage) { |
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$table_name = $key_usage['TABLE_NAME']; |
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if (isset($key_usage['REFERENCED_TABLE_NAME'])) { // FOREIGN KEYS |
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$this->addForeignKeyByTable($table_name, $key_usage); |
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// $this->fk_by_table[$table_name] = $this->fk_by_table[$table_name] ?? []; |
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// $this->fk_by_table[$table_name][$key_usage['COLUMN_NAME']] = [$key_usage['REFERENCED_TABLE_NAME'], $key_usage['REFERENCED_COLUMN_NAME']]; |
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} |
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if (!isset($key_usage['POSITION_IN_UNIQUE_CONSTRAINT'])) { // PRIMARY & UNIQUES |
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$this->addUniqueKeyByTable($table_name, $key_usage); |
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// $constraint_name = $key_usage['CONSTRAINT_NAME']; |
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// $column_name = $key_usage['COLUMN_NAME']; |
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// |
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// $this->unique_by_table[$table_name] = $this->unique_by_table[$table_name] ?? []; |
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// $this->unique_by_table[$table_name][$constraint_name] = $this->unique_by_table[$table_name][$constraint_name] ?? []; |
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// $this->unique_by_table[$table_name][$constraint_name][$key_usage['ORDINAL_POSITION']] = $column_name; |
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} |
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} |
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$this->refactorConstraintNameIndex(); |
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} |
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// vague memory that it makes later operation easier. written on the spot.. testing will reveal it's true nature |
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private function refactorConstraintNameIndex() |
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{ |
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foreach ($this->unique_by_table as $table_name => $uniques) { |
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foreach ($uniques as $constraint_name => $columns) { |
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foreach ($columns as $column_name) { |
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$this->unique_by_table[$table_name][$column_name] = [0 => $constraint_name] + $columns; |
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} |
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unset($this->unique_by_table[$table_name][$constraint_name]); |
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} |
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} |
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} |
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private function addUniqueKeyByTable($table_name, $key_usage) |
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{ |
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$constraint_name = $key_usage['CONSTRAINT_NAME']; |
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$column_name = $key_usage['COLUMN_NAME']; |
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$this->unique_by_table[$table_name] = $this->unique_by_table[$table_name] ?? []; |
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$this->unique_by_table[$table_name][$constraint_name] = $this->unique_by_table[$table_name][$constraint_name] ?? []; |
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$this->unique_by_table[$table_name][$constraint_name][$key_usage['ORDINAL_POSITION']] = $column_name; |
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} |
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private function addForeignKeyByTable($table_name, $key_usage) |
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{ |
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$this->fk_by_table[$table_name] = $this->fk_by_table[$table_name] ?? []; |
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$this->fk_by_table[$table_name][$key_usage['COLUMN_NAME']] = [$key_usage['REFERENCED_TABLE_NAME'], $key_usage['REFERENCED_COLUMN_NAME']]; |
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} |
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public function inspect($table_name): TableManipulationInterface |
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{ |
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if (isset($this->table_cache[$table_name])) { |
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return $this->table_cache[$table_name]; |
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} |
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$describe = (new Describe($table_name)); |
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$describe->connection($this->connection()); |
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$description = $describe->ret(); |
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// TODO test this when all is back to normal 2021.03.09 |
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if ($description === false) { |
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throw new \PDOException("Unable to describe $table_name"); |
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} |
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$table = new Manipulation($table_name, $this->connection()); |
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foreach ($description as $column_name => $specs) { |
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$column = new Column($table, $column_name, $specs); |
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// handling usage constraints |
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if (isset($this->unique_by_table[$table_name][$column_name])) { |
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$unique_name = $this->unique_by_table[$table_name][$column_name][0]; |
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135
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switch (count($this->unique_by_table[$table_name][$column_name])) { |
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case 2: // constraint name + column |
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$column->uniqueName($unique_name); |
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$table->addUniqueKey($unique_name, $column_name); |
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break; |
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default: |
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$column->uniqueGroupName($unique_name); |
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unset($this->unique_by_table[$table_name][$column_name][0]); |
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$table->addUniqueKey($unique_name, $this->unique_by_table[$table_name][$column_name]); |
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break; |
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} |
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} |
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// handling usage foreign keys |
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if (($reference = $this->getForeignKey($table_name, $column_name)) !== false) { |
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$column->isForeign(true); |
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$column->setForeignTableName($reference[0]); |
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$column->setForeignColumnName($reference[1]); |
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$table->addForeignKey($column); |
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} |
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$table->addColumn($column); |
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} |
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// ddt($table); |
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$this->table_cache[$table_name] = $table; |
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return $this->table_cache[$table_name]; |
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} |
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public function getForeignKey($table_name, $column_name) |
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{ |
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return $this->fk_by_table[$table_name][$column_name] ?? false; |
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} |
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} |
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HexMakina /
Crudites
