Source.php

<?php

namespace Silver\Database;

use Silver\Database\Source\Table as TableSource;
use Silver\Database\Source\Model as ModelSource;
use Silver\Database\Source\Query as QuerySource;
use Silver\Database\Source;
use Silver\Database\Query;
use Silver\Database\Parts\Name;

abstract class Source
{
	private $name;

	protected function __construct(string $name)
	{
		if (empty($name)) {
			throw new \Exception("Source must have a name.");
		}
		$this->name = $name;
	}

	public function name(): string
	{
		return $this->name;
	}

	abstract public function primary();
	abstract public function table();
	abstract public function sourcePart();

	public function namePart(): Name
	{
		return Name::ensure($this->name());
	}

	public function reference(string $refName, Query $q, string $alias, array $args=[]): object
	{
		throw new \Exception('Source ' . static::class . ' does not supports references.');
	}

	public function relation(string $relName, string $alias): object
	{
		throw new \Exception('Source ' . static::class . ' does not supports relations.');
	}

	public static function make($source, string $alias = null): Source
	{
		if ($source instanceof Query) {
			return new QuerySource($source, $alias);
		} else if (class_exists($source) and is_subclass_of($source, QueryObject::class)) {
			return new ModelSource($source, $alias);
		} else if (is_string($source)) {
			return new TableSource($source, $alias);
		} else {
			throw new Exception("Wrong class name '$model'"); // Should be QueryException
		}
	}
}