<?php
/**
 * Created by PhpStorm.
 * User: stanley-king
 * Date: 2018/1/6
 * Time: 下午10:55
 */

class Cart
{
    const PRICE_BUTTER  = 1.00;
    const PRICE_MILK    = 3.00;
    const PRICE_EGGS    = 6.95;

    protected   $products = array();

    public function add($product, $quantity)
    {
        $this->products[$product] = $quantity;
    }

    public function getQuantity($product)
    {
        return isset($this->products[$product]) ? $this->products[$product] : FALSE;
    }

    public function getTotal($tax)
    {
        $total = 0.00;

        $callback = function ($quantity, $product) use ($tax, &$total) {
            $pricePerItem = constant(__CLASS__ . "::PRICE_" . strtoupper($product));
            $total += ($pricePerItem * $quantity) * ($tax + 1.0);
        };

        array_walk($this->products, $callback);

        return round($total, 2);
    }
}

class Test
{
    public function testing()
    {
        return function() {
            var_dump($this);
        };
    }
}

class A
{
    public static $ClassNameX = 'HelloA';

    function __construct($val) {
        $this->val = $val;
    }

    function getClosure() {
        //returns closure bound to this object and scope
        return function() { return $this->val; };
    }
}


class StaticTest
{
    public function __call($method, $parameters)
    {
        if($method == "where") {
            echo json_encode($parameters);
        }
        elseif($method == "field") {
            echo json_encode($parameters);
        }

        return $this;
    }
    public function select()
    {
        echo "select";
    }

    /**
     * Dynamically pass methods to the default connection.
     *
     * @param  string  $method
     * @param  array   $parameters
     * @return mixed
     */
    public static function __callStatic($method, $parameters)
    {
        if($method == "where") {
            $obj = new StaticTest();
            return $obj->where($method,$parameters);
        }
    }
}

class TestPhpLang extends PHPUnit_Framework_TestCase
{
    public function testCart()
    {
        $my_cart = new Cart;

        // 往购物车里添加条目
        $my_cart->add('butter', 1);
        $my_cart->add('milk', 3);
        $my_cart->add('eggs', 6);

        // 打出出总价格，其中有 5% 的销售税.
        print $my_cart->getTotal(0.05) . "\n";
    }

    public function testClass()
    {
        $object = new Test;
        $function = $object->testing();
        $function();
    }

    public function testBlock()
    {
        $message = 'hello';
        $example = function () use($message){
            var_dump($message);
        };
        $example();

        $example = function () use (&$message) {
            var_dump($message);
        };

        $this->block(function () {
            echo "hello world";
        });

    }

    private function block(callable $func)
    {
        $func();
    }

    public function testBind()
    {
        $func = function() {
            echo __METHOD__;
        };
        $func = $func->bindTo(new StdClass);
        $func();
    }

    public function testClosure()
    {
        $st_cl = function() {
            return self::$ClassNameX;
        };

        $mem_cl = function() {
            return $this->val;
        };

        $ob1 = new A(1);
        $ob2 = new A(2);
        echo A::class;

        $cl2 = Closure::bind($st_cl,NULL,A::class);
        echo $cl2();

        $cl = $mem_cl->bindTo($ob1);
        echo $cl();
    }

    public function testStaticCall()
    {
        StaticTest::where(['i am here'])->field()->select();
    }

    function array_insert (&$array, $pos, $new)
    {
        if(is_array($new)) {
            $x = array_slice( $array, 0, $pos );
            $x[] = $new;
            $y = array_slice( $array, $pos );
            $array = array_merge( $x, $y );
        }
        else {

        }
    }
}