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<?php
namespace Illuminate\Validation\Rules;
use Closure;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Str;
trait DatabaseRule
{
/**
* The table to run the query against.
*
* @var string
*/
protected $table;
/**
* The column to check on.
*
* @var string
*/
protected $column;
/**
* The extra where clauses for the query.
*
* @var array
*/
protected $wheres = [];
/**
* The array of custom query callbacks.
*
* @var array
*/
protected $using = [];
/**
* Create a new rule instance.
*
* @param string $table
* @param string $column
* @return void
*/
public function __construct($table, $column = 'NULL')
{
$this->column = $column;
$this->table = $this->resolveTableName($table);
}
/**
* Resolves the name of the table from the given string.
*
* @param string $table
* @return string
*/
public function resolveTableName($table)
{
if (! Str::contains($table, '\\') || ! class_exists($table)) {
return $table;
}
if (is_subclass_of($table, Model::class)) {
$model = new $table;
if (Str::contains($model->getTable(), '.')) {
return $table;
}
return implode('.', array_map(function (string $part) {
return trim($part, '.');
}, array_filter([$model->getConnectionName(), $model->getTable()])));
}
return $table;
}
/**
* Set a "where" constraint on the query.
*
* @param \Closure|string $column
* @param array|string|int|null $value
* @return $this
*/
public function where($column, $value = null)
{
if (is_array($value)) {
return $this->whereIn($column, $value);
}
if ($column instanceof Closure) {
return $this->using($column);
}
if (is_null($value)) {
return $this->whereNull($column);
}
$this->wheres[] = compact('column', 'value');
return $this;
}
/**
* Set a "where not" constraint on the query.
*
* @param string $column
* @param array|string $value
* @return $this
*/
public function whereNot($column, $value)
{
if (is_array($value)) {
return $this->whereNotIn($column, $value);
}
return $this->where($column, '!'.$value);
}
/**
* Set a "where null" constraint on the query.
*
* @param string $column
* @return $this
*/
public function whereNull($column)
{
return $this->where($column, 'NULL');
}
/**
* Set a "where not null" constraint on the query.
*
* @param string $column
* @return $this
*/
public function whereNotNull($column)
{
return $this->where($column, 'NOT_NULL');
}
/**
* Set a "where in" constraint on the query.
*
* @param string $column
* @param array $values
* @return $this
*/
public function whereIn($column, array $values)
{
return $this->where(function ($query) use ($column, $values) {
$query->whereIn($column, $values);
});
}
/**
* Set a "where not in" constraint on the query.
*
* @param string $column
* @param array $values
* @return $this
*/
public function whereNotIn($column, array $values)
{
return $this->where(function ($query) use ($column, $values) {
$query->whereNotIn($column, $values);
});
}
/**
* Register a custom query callback.
*
* @param \Closure $callback
* @return $this
*/
public function using(Closure $callback)
{
$this->using[] = $callback;
return $this;
}
/**
* Get the custom query callbacks for the rule.
*
* @return array
*/
public function queryCallbacks()
{
return $this->using;
}
/**
* Format the where clauses.
*
* @return string
*/
protected function formatWheres()
{
return collect($this->wheres)->map(function ($where) {
return $where['column'].','.'"'.str_replace('"', '""', $where['value']).'"';
})->implode(',');
}
}