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<?php |
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/** |
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* @author Todd Burry <[email protected]> |
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* @copyright 2009-2014 Vanilla Forums Inc. |
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* @license MIT |
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*/ |
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namespace Garden\Db; |
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/** |
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* A helper class for creating database tables. |
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*/ |
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class TableDef implements \JsonSerializable { |
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/// Properties /// |
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/** |
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* @var array The columns that need to be set in the table. |
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*/ |
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private $columns; |
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/** |
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* |
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* @var string The name of the currently working table. |
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*/ |
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private $table; |
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/** |
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* @var array An array of indexes. |
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*/ |
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private $indexes; |
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/// Methods /// |
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/** |
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* Initialize an instance of the {@link TableDef} class. |
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* |
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* @param string $name The name of the table. |
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*/ |
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public function __construct($name = '') { |
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$this->reset(); |
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$this->table = $name; |
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} |
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/** |
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* Reset the internal state of this object so that it can be re-used. |
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* |
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* @return TableDef Returns $this for fluent calls. |
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*/ |
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public function reset() { |
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$this->table = ''; |
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$this->columns = []; |
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$this->indexes = []; |
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// $this->options = []; |
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return $this; |
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} |
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/** |
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* Define a column. |
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* |
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* @param string $name The column name. |
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* @param string $type The column type. |
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* @param mixed $nullDefault Whether the column is required or it's default. |
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* |
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* null|true |
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* : The column is not required. |
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* false |
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* : The column is required. |
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* Anything else |
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* : The column is required and this is its default. |
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* @return TableDef |
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*/ |
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public function setColumn($name, $type, $nullDefault = false) { |
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$this->columns[$name] = $this->createColumnDef($type, $nullDefault); |
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return $this; |
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} |
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/** |
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* Get an array column def from a structured function call. |
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* |
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* @param string $dbtype The database type of the column. |
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* @param mixed $nullDefault Whether or not to allow null or the default value. |
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* |
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* null|true |
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* : The column is not required. |
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* false |
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* : The column is required. |
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* Anything else |
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* : The column is required and this is its default. |
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* |
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* @return array Returns the column def as an array. |
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*/ |
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private function createColumnDef($dbtype, $nullDefault = false) { |
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$column = Db::typeDef($dbtype); |
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if ($column === null) { |
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throw new \InvalidArgumentException("Unknown type '$dbtype'.", 500); |
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} |
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if ($column['dbtype'] === 'bool' && in_array($nullDefault, [true, false], true)) { |
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// Booleans have a special meaning. |
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$column['allowNull'] = false; |
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$column['default'] = $nullDefault; |
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} elseif ($nullDefault === null || $nullDefault === true) { |
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$column['allowNull'] = true; |
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} elseif ($nullDefault === false) { |
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$column['allowNull'] = false; |
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} else { |
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$column['allowNull'] = false; |
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$column['default'] = $nullDefault; |
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} |
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return $column; |
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} |
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/** |
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* Define the primary key in the database. |
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* |
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* @param string $name The name of the column. |
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* @param string $type The datatype for the column. |
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* @return TableDef |
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*/ |
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public function setPrimaryKey($name, $type = 'int') { |
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$column = $this->createColumnDef($type, false); |
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$column['autoIncrement'] = true; |
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$column['primary'] = true; |
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$this->columns[$name] = $column; |
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// Add the pk index. |
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$this->addIndex(Db::INDEX_PK, $name); |
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return $this; |
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} |
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/** |
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* Add or update an index. |
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* |
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* @param string $type One of the `Db::INDEX_*` constants. |
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* @param array $columns The columns in the index. |
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* @return $this |
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*/ |
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public function addIndex($type, ...$columns) { |
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$type = strtolower($type); |
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// Look for a current index row. |
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$currentIndex = null; |
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foreach ($this->indexes as $i => $index) { |
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if ($type !== $index['type']) { |
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continue; |
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} |
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if ($type === Db::INDEX_PK || array_diff($index['columns'], $columns) == []) { |
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$currentIndex =& $this->indexes[$i]; |
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break; |
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} |
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} |
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if ($currentIndex) { |
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$currentIndex['columns'] = $columns; |
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} else { |
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$indexDef = [ |
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'type' => $type, |
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'columns' => $columns, |
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]; |
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$this->indexes[] = $indexDef; |
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} |
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return $this; |
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} |
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/** |
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* Get the table. |
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* |
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* @return string Returns the table. |
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*/ |
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public function getTable() { |
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return $this->table; |
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} |
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/** |
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* Set the name of the table. |
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* |
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* @param string|null $name The name of the table. |
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* @return TableDef|string Returns $this for fluent calls. |
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*/ |
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public function setTable($name) { |
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$this->table = $name; |
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return $this; |
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} |
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/** |
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* Specify data which should be serialized to JSON. |
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* |
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* @link http://php.net/manual/en/jsonserializable.jsonserialize.php |
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* @return mixed data which can be serialized by {@link json_encode()}, |
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* which is a value of any type other than a resource. |
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*/ |
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public function jsonSerialize() { |
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return $this->toArray(); |
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} |
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/** |
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* Get the array representation of the table definition. |
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* |
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* @return array Returns a definition array. |
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*/ |
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public function toArray() { |
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return [ |
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'name' => $this->table, |
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'columns' => $this->columns, |
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'indexes' => $this->indexes |
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]; |
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} |
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/** |
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* Execute this table definition on a database. |
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* |
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* @param Db $db The database to query. |
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* @param array $options Additional options. See {@link Db::defineTable()}. |
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*/ |
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public function exec(Db $db, array $options = []) { |
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$db->defineTable($this->toArray(), $options); |
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} |
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} |
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This check looks for multiple assignments in successive lines of code. It will report an issue if the operators are not in a straight line.
To visualize
will produce issues in the first and second line, while this second example
will produce no issues.