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<?php
namespace Illuminate\Database\Schema;
use Closure;
use Illuminate\Database\Connection;
class Builder
{
/**
* The database connection instance.
*
* @var \Illuminate\Database\Connection
*/
protected $connection;
/**
* The schema grammar instance.
*
* @var \Illuminate\Database\Schema\Grammars\Grammar
*/
protected $grammar;
/**
* The Blueprint resolver callback.
*
* @var \Closure
*/
protected $resolver;
/**
* Create a new database Schema manager.
*
* @param \Illuminate\Database\Connection $connection
* @return void
*/
public function __construct(Connection $connection)
{
$this->connection = $connection;
$this->grammar = $connection->getSchemaGrammar();
}
/**
* Determine if the given table exists.
*
* @param string $table
* @return bool
*/
public function hasTable($table)
{
$sql = $this->grammar->compileTableExists();
$table = $this->connection->getTablePrefix().$table;
return count($this->connection->select($sql, [$table])) > 0;
}
/**
* Determine if the given table has a given column.
*
* @param string $table
* @param string $column
* @return bool
*/
public function hasColumn($table, $column)
{
$column = strtolower($column);
return in_array($column, array_map('strtolower', $this->getColumnListing($table)));
}
/**
* Determine if the given table has given columns.
*
* @param string $table
* @param array $columns
* @return bool
*/
public function hasColumns($table, array $columns)
{
$tableColumns = array_map('strtolower', $this->getColumnListing($table));
foreach ($columns as $column) {
if (! in_array(strtolower($column), $tableColumns)) {
return false;
}
}
return true;
}
/**
* Get the data type for the given column name.
*
* @param string $table
* @param string $column
* @return string
*/
public function getColumnType($table, $column)
{
$table = $this->connection->getTablePrefix().$table;
return $this->connection->getDoctrineColumn($table, $column)->getType()->getName();
}
/**
* Get the column listing for a given table.
*
* @param string $table
* @return array
*/
public function getColumnListing($table)
{
$table = $this->connection->getTablePrefix().$table;
$results = $this->connection->select($this->grammar->compileColumnExists($table));
return $this->connection->getPostProcessor()->processColumnListing($results);
}
/**
* Modify a table on the schema.
*
* @param string $table
* @param \Closure $callback
* @return \Illuminate\Database\Schema\Blueprint
*/
public function table($table, Closure $callback)
{
$this->build($this->createBlueprint($table, $callback));
}
/**
* Create a new table on the schema.
*
* @param string $table
* @param \Closure $callback
* @return \Illuminate\Database\Schema\Blueprint
*/
public function create($table, Closure $callback)
{
$blueprint = $this->createBlueprint($table);
$blueprint->create();
$callback($blueprint);
$this->build($blueprint);
}
/**
* Drop a table from the schema.
*
* @param string $table
* @return \Illuminate\Database\Schema\Blueprint
*/
public function drop($table)
{
$blueprint = $this->createBlueprint($table);
$blueprint->drop();
$this->build($blueprint);
}
/**
* Drop a table from the schema if it exists.
*
* @param string $table
* @return \Illuminate\Database\Schema\Blueprint
*/
public function dropIfExists($table)
{
$blueprint = $this->createBlueprint($table);
$blueprint->dropIfExists();
$this->build($blueprint);
}
/**
* Rename a table on the schema.
*
* @param string $from
* @param string $to
* @return \Illuminate\Database\Schema\Blueprint
*/
public function rename($from, $to)
{
$blueprint = $this->createBlueprint($from);
$blueprint->rename($to);
$this->build($blueprint);
}
/**
* Enable foreign key constraints.
*
* @return bool
*/
public function enableForeignKeyConstraints()
{
return $this->connection->statement(
$this->grammar->compileEnableForeignKeyConstraints()
);
}
/**
* Disable foreign key constraints.
*
* @return bool
*/
public function disableForeignKeyConstraints()
{
return $this->connection->statement(
$this->grammar->compileDisableForeignKeyConstraints()
);
}
/**
* Execute the blueprint to build / modify the table.
*
* @param \Illuminate\Database\Schema\Blueprint $blueprint
* @return void
*/
protected function build(Blueprint $blueprint)
{
$blueprint->build($this->connection, $this->grammar);
}
/**
* Create a new command set with a Closure.
*
* @param string $table
* @param \Closure|null $callback
* @return \Illuminate\Database\Schema\Blueprint
*/
protected function createBlueprint($table, Closure $callback = null)
{
if (isset($this->resolver)) {
return call_user_func($this->resolver, $table, $callback);
}
return new Blueprint($table, $callback);
}
/**
* Get the database connection instance.
*
* @return \Illuminate\Database\Connection
*/
public function getConnection()
{
return $this->connection;
}
/**
* Set the database connection instance.
*
* @param \Illuminate\Database\Connection $connection
* @return $this
*/
public function setConnection(Connection $connection)
{
$this->connection = $connection;
return $this;
}
/**
* Set the Schema Blueprint resolver callback.
*
* @param \Closure $resolver
* @return void
*/
public function blueprintResolver(Closure $resolver)
{
$this->resolver = $resolver;
}
}