<?php

namespace Illuminate\Database\Query;

use Closure;

class JoinClause extends Builder
{
    /**
     * The type of join being performed.
     *
     * @var string
     */
    public $type;

    /**
     * The table the join clause is joining to.
     *
     * @var string
     */
    public $table;

    /**
     * The connection of the parent query builder.
     *
     * @var \Illuminate\Database\ConnectionInterface
     */
    protected $parentConnection;

    /**
     * The grammar of the parent query builder.
     *
     * @var \Illuminate\Database\Query\Grammars\Grammar
     */
    protected $parentGrammar;

    /**
     * The processor of the parent query builder.
     *
     * @var \Illuminate\Database\Query\Processors\Processor
     */
    protected $parentProcessor;

    /**
     * The class name of the parent query builder.
     *
     * @var string
     */
    protected $parentClass;

    /**
     * Create a new join clause instance.
     *
     * @param  \Illuminate\Database\Query\Builder  $parentQuery
     * @param  string  $type
     * @param  string  $table
     * @return void
     */
    public function __construct(Builder $parentQuery, $type, $table)
    {
        $this->type = $type;
        $this->table = $table;
        $this->parentClass = get_class($parentQuery);
        $this->parentGrammar = $parentQuery->getGrammar();
        $this->parentProcessor = $parentQuery->getProcessor();
        $this->parentConnection = $parentQuery->getConnection();

        parent::__construct(
            $this->parentConnection, $this->parentGrammar, $this->parentProcessor
        );
    }

    /**
     * Add an "on" clause to the join.
     *
     * On clauses can be chained, e.g.
     *
     *  $join->on('contacts.user_id', '=', 'users.id')
     *       ->on('contacts.info_id', '=', 'info.id')
     *
     * will produce the following SQL:
     *
     * on `contacts`.`user_id` = `users`.`id` and `contacts`.`info_id` = `info`.`id`
     *
     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
     * @param  string|null  $operator
     * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
     * @param  string  $boolean
     * @return $this
     *
     * @throws \InvalidArgumentException
     */
    public function on($first, $operator = null, $second = null, $boolean = 'and')
    {
        if ($first instanceof Closure) {
            return $this->whereNested($first, $boolean);
        }

        return $this->whereColumn($first, $operator, $second, $boolean);
    }

    /**
     * Add an "or on" clause to the join.
     *
     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
     * @param  string|null  $operator
     * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
     * @return \Illuminate\Database\Query\JoinClause
     */
    public function orOn($first, $operator = null, $second = null)
    {
        return $this->on($first, $operator, $second, 'or');
    }

    /**
     * Get a new instance of the join clause builder.
     *
     * @return \Illuminate\Database\Query\JoinClause
     */
    public function newQuery()
    {
        return new static($this->newParentQuery(), $this->type, $this->table);
    }

    /**
     * Create a new query instance for sub-query.
     *
     * @return \Illuminate\Database\Query\Builder
     */
    protected function forSubQuery()
    {
        return $this->newParentQuery()->newQuery();
    }

    /**
     * Create a new parent query instance.
     *
     * @return \Illuminate\Database\Query\Builder
     */
    protected function newParentQuery()
    {
        $class = $this->parentClass;

        return new $class($this->parentConnection, $this->parentGrammar, $this->parentProcessor);
    }
}

.NET Framework

Project Request

ProjectC

Vehicle Maintenance

Movie Navigator

Customers Exchange

ATM

.NET Core

Mail Daemon

Custom

Buns of code

PHP

Mediabox

Loan Castle

Content Management

Laravel

Phone Check

Frontend

Forex Wall

Business projects

Certification Center

Amerikas Auto

Pet projects

Geolocation Assistant

Web Dynamics

Blackball

Good old times

DOS Clock

BrainOut

Airport Administrator

Atomizer

Mediabox