class-wc-cart.php 76.4 KB
Newer Older
imac's avatar
imac committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350
<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

/**
 * WooCommerce cart
 *
 * The WooCommerce cart class stores cart data and active coupons as well as handling customer sessions and some cart related urls.
 * The cart class also has a price calculation function which calls upon other classes to calculate totals.
 *
 * @class 		WC_Cart
 * @version		2.1.0
 * @package		WooCommerce/Classes
 * @category	Class
 * @author 		WooThemes
 */
class WC_Cart {

	/** @var array Contains an array of cart items. */
	public $cart_contents = array();

	/** @var array Contains an array of removed cart items. */
	public $removed_cart_contents = array();

	/** @var array Contains an array of coupon codes applied to the cart. */
	public $applied_coupons = array();

	/** @var array Contains an array of coupon code discounts after they have been applied. */
	public $coupon_discount_amounts = array();

	/** @var array Contains an array of coupon code discount taxes. Used for tax incl pricing. */
	public $coupon_discount_tax_amounts = array();

	/** @var array Contains an array of coupon usage counts after they have been applied. */
	public $coupon_applied_count = array();

	/** @var array Array of coupons */
	public $coupons = array();

	/** @var float The total cost of the cart items. */
	public $cart_contents_total;

	/** @var float Cart grand total. */
	public $total;

	/** @var float Cart subtotal. */
	public $subtotal;

	/** @var float Cart subtotal without tax. */
	public $subtotal_ex_tax;

	/** @var float Total cart tax. */
	public $tax_total;

	/** @var array An array of taxes/tax rates for the cart. */
	public $taxes;

	/** @var array An array of taxes/tax rates for the shipping. */
	public $shipping_taxes;

	/** @var float Discount amount before tax */
	public $discount_cart;

	/** @var float Discounted tax amount. Used predominantly for displaying tax inclusive prices correctly */
	public $discount_cart_tax;

	/** @var float Total for additional fees. */
	public $fee_total;

	/** @var float Shipping cost. */
	public $shipping_total;

	/** @var float Shipping tax. */
	public $shipping_tax_total;

	/** @var array cart_session_data. Array of data the cart calculates and stores in the session with defaults */
	public $cart_session_data = array(
		'cart_contents_total'         => 0,
		'total'                       => 0,
		'subtotal'                    => 0,
		'subtotal_ex_tax'             => 0,
		'tax_total'                   => 0,
		'taxes'                       => array(),
		'shipping_taxes'              => array(),
		'discount_cart'               => 0,
		'discount_cart_tax'           => 0,
		'shipping_total'              => 0,
		'shipping_tax_total'          => 0,
		'coupon_discount_amounts'     => array(),
		'coupon_discount_tax_amounts' => array(),
		'fee_total'                   => 0,
		'fees'                        => array(),
	);

	/**
	 * An array of fees.
	 *
	 * @var array
	 */
	public $fees = array();

	/**
	 * Constructor for the cart class. Loads options and hooks in the init method.
	 */
	public function __construct() {
		add_action( 'wp_loaded', array( $this, 'init' ) ); // Get cart after WP and plugins are loaded.
		add_action( 'wp', array( $this, 'maybe_set_cart_cookies' ), 99 ); // Set cookies
		add_action( 'shutdown', array( $this, 'maybe_set_cart_cookies' ), 0 ); // Set cookies before shutdown and ob flushing
		add_action( 'woocommerce_add_to_cart', array( $this, 'calculate_totals' ), 20, 0 );
		add_action( 'woocommerce_applied_coupon', array( $this, 'calculate_totals' ), 20, 0 );
	}

	/**
	 * Auto-load in-accessible properties on demand.
	 *
	 * @param mixed $key
	 * @return mixed
	 */
	public function __get( $key ) {
		switch ( $key ) {
			case 'prices_include_tax' :
				return wc_prices_include_tax();
			break;
			case 'round_at_subtotal' :
				return 'yes' === get_option( 'woocommerce_tax_round_at_subtotal' );
			break;
			case 'tax_display_cart' :
				return get_option( 'woocommerce_tax_display_cart' );
			break;
			case 'dp' :
				return wc_get_price_decimals();
			break;
			case 'display_totals_ex_tax' :
			case 'display_cart_ex_tax' :
				return 'excl' === $this->tax_display_cart;
			break;
			case 'cart_contents_weight' :
				return $this->get_cart_contents_weight();
			break;
			case 'cart_contents_count' :
				return $this->get_cart_contents_count();
			break;
			case 'tax' :
				wc_deprecated_argument( 'WC_Cart->tax', '2.3', 'Use WC_Tax:: directly' );
				$this->tax = new WC_Tax();
			return $this->tax;
			case 'discount_total':
				wc_deprecated_argument( 'WC_Cart->discount_total', '2.3', 'After tax coupons are no longer supported. For more information see: https://woocommerce.wordpress.com/2014/12/upcoming-coupon-changes-in-woocommerce-2-3/' );
			return 0;
		}
	}

	/**
	 * Loads the cart data from the PHP session during WordPress init and hooks in other methods.
	 */
	public function init() {
		$this->get_cart_from_session();

		add_action( 'woocommerce_check_cart_items', array( $this, 'check_cart_items' ), 1 );
		add_action( 'woocommerce_check_cart_items', array( $this, 'check_cart_coupons' ), 1 );
		add_action( 'woocommerce_after_checkout_validation', array( $this, 'check_customer_coupons' ), 1 );
	}

	/**
	 * Will set cart cookies if needed, once, during WP hook.
	 */
	public function maybe_set_cart_cookies() {
		if ( ! headers_sent() && did_action( 'wp_loaded' ) ) {
			if ( ! $this->is_empty() ) {
				$this->set_cart_cookies( true );
			} elseif ( isset( $_COOKIE['woocommerce_items_in_cart'] ) ) {
				$this->set_cart_cookies( false );
			}
		}
	}

	/**
	 * Set cart hash cookie and items in cart.
	 *
	 * @access private
	 * @param bool $set (default: true)
	 */
	private function set_cart_cookies( $set = true ) {
		if ( $set ) {
			wc_setcookie( 'woocommerce_items_in_cart', 1 );
			wc_setcookie( 'woocommerce_cart_hash', md5( json_encode( $this->get_cart_for_session() ) ) );
		} elseif ( isset( $_COOKIE['woocommerce_items_in_cart'] ) ) {
			wc_setcookie( 'woocommerce_items_in_cart', 0, time() - HOUR_IN_SECONDS );
			wc_setcookie( 'woocommerce_cart_hash', '', time() - HOUR_IN_SECONDS );
		}
		do_action( 'woocommerce_set_cart_cookies', $set );
	}

	/*
	/* Cart Session Handling
	*/

	/**
	 * Get the cart data from the PHP session and store it in class variables.
	 */
	public function get_cart_from_session() {
		// Load cart session data from session
		foreach ( $this->cart_session_data as $key => $default ) {
			$this->$key = WC()->session->get( $key, $default );
		}

		$update_cart_session         = false;
		$this->removed_cart_contents = array_filter( WC()->session->get( 'removed_cart_contents', array() ) );
		$this->applied_coupons       = array_filter( WC()->session->get( 'applied_coupons', array() ) );

		/**
		 * Load the cart object. This defaults to the persistent cart if null.
		 */
		$cart = WC()->session->get( 'cart', null );

		if ( is_null( $cart ) && ( $saved_cart = get_user_meta( get_current_user_id(), '_woocommerce_persistent_cart_' . get_current_blog_id(), true ) ) ) {
			$cart                = $saved_cart['cart'];
			$update_cart_session = true;
		} elseif ( is_null( $cart ) ) {
			$cart = array();
		}

		if ( is_array( $cart ) ) {
			// Prime meta cache to reduce future queries
			update_meta_cache( 'post', wp_list_pluck( $cart, 'product_id' ) );
			update_object_term_cache( wp_list_pluck( $cart, 'product_id' ), 'product' );

			foreach ( $cart as $key => $values ) {
				$product = wc_get_product( $values['variation_id'] ? $values['variation_id'] : $values['product_id'] );

				if ( ! empty( $product ) && $product->exists() && $values['quantity'] > 0 ) {

					if ( ! $product->is_purchasable() ) {

						// Flag to indicate the stored cart should be update
						$update_cart_session = true;
						/* translators: %s: product name */
						wc_add_notice( sprintf( __( '%s has been removed from your cart because it can no longer be purchased. Please contact us if you need assistance.', 'woocommerce' ), $product->get_name() ), 'error' );
						do_action( 'woocommerce_remove_cart_item_from_session', $key, $values );

					} else {

						// Put session data into array. Run through filter so other plugins can load their own session data
						$session_data = array_merge( $values, array( 'data' => $product ) );
						$this->cart_contents[ $key ] = apply_filters( 'woocommerce_get_cart_item_from_session', $session_data, $values, $key );

					}
				}
			}
		}

		// Trigger action
		do_action( 'woocommerce_cart_loaded_from_session', $this );

		if ( $update_cart_session ) {
			WC()->session->cart = $this->get_cart_for_session();
		}

		// Queue re-calc if subtotal is not set
		if ( ( ! $this->subtotal && ! $this->is_empty() ) || $update_cart_session ) {
			$this->calculate_totals();
		}
	}

	/**
	 * Sets the php session data for the cart and coupons.
	 */
	public function set_session() {
		// Set cart and coupon session data
		$cart_session = $this->get_cart_for_session();

		WC()->session->set( 'cart', $cart_session );
		WC()->session->set( 'applied_coupons', $this->applied_coupons );
		WC()->session->set( 'coupon_discount_amounts', $this->coupon_discount_amounts );
		WC()->session->set( 'coupon_discount_tax_amounts', $this->coupon_discount_tax_amounts );
		WC()->session->set( 'removed_cart_contents', $this->removed_cart_contents );

		foreach ( $this->cart_session_data as $key => $default ) {
			WC()->session->set( $key, $this->$key );
		}

		if ( get_current_user_id() ) {
			$this->persistent_cart_update();
		}

		do_action( 'woocommerce_cart_updated' );
	}

	/**
	 * Empties the cart and optionally the persistent cart too.
	 *
	 * @param bool $clear_persistent_cart (default: true)
	 */
	public function empty_cart( $clear_persistent_cart = true ) {
		$this->cart_contents = array();
		$this->reset( true );

		unset( WC()->session->order_awaiting_payment, WC()->session->applied_coupons, WC()->session->coupon_discount_amounts, WC()->session->coupon_discount_tax_amounts, WC()->session->cart );

		if ( $clear_persistent_cart && get_current_user_id() ) {
			$this->persistent_cart_destroy();
		}

		do_action( 'woocommerce_cart_emptied' );
	}

	/*
	 * Persistent cart handling
	 */

	/**
	 * Save the persistent cart when the cart is updated.
	 */
	public function persistent_cart_update() {
		update_user_meta( get_current_user_id(), '_woocommerce_persistent_cart_' . get_current_blog_id(), array(
			'cart' => WC()->session->get( 'cart' ),
		) );
	}

	/**
	 * Delete the persistent cart permanently.
	 */
	public function persistent_cart_destroy() {
		delete_user_meta( get_current_user_id(), '_woocommerce_persistent_cart_' . get_current_blog_id() );
	}

	/*
	 * Cart Data Functions.
	 */

	/**
	 * Coupons enabled function. Filterable.
	 *
	 * @deprecated 2.5.0 in favor to wc_coupons_enabled()
	 *
	 * @return bool
	 */
	public function coupons_enabled() {
		return wc_coupons_enabled();
	}

	/**
	 * Get number of items in the cart.
	 * @return int
	 */
	public function get_cart_contents_count() {
		return apply_filters( 'woocommerce_cart_contents_count', array_sum( wp_list_pluck( $this->get_cart(), 'quantity' ) ) );
	}

	/**
	 * Get weight of items in the cart.
	 * @since 2.5.0
	 * @return int
	 */
	public function get_cart_contents_weight() {
		$weight = 0;

		foreach ( $this->get_cart() as $cart_item_key => $values ) {
			$weight += (float) $values['data']->get_weight() * $values['quantity'];
		}

		return apply_filters( 'woocommerce_cart_contents_weight', $weight );
	}

	/**
	 * Checks if the cart is empty.
	 *
	 * @return bool
	 */
	public function is_empty() {
		return 0 === sizeof( $this->get_cart() );
	}

	/**
	 * Check all cart items for errors.
	 */
	public function check_cart_items() {

		// Result
		$return = true;

		// Check cart item validity
		$result = $this->check_cart_item_validity();

		if ( is_wp_error( $result ) ) {
			wc_add_notice( $result->get_error_message(), 'error' );
			$return = false;
		}

		// Check item stock
		$result = $this->check_cart_item_stock();

		if ( is_wp_error( $result ) ) {
			wc_add_notice( $result->get_error_message(), 'error' );
			$return = false;
		}

		return $return;

	}

	/**
	 * Check cart coupons for errors.
	 */
	public function check_cart_coupons() {
		foreach ( $this->applied_coupons as $code ) {
			$coupon = new WC_Coupon( $code );

			if ( ! $coupon->is_valid() ) {
				// Error message
				$coupon->add_coupon_message( WC_Coupon::E_WC_COUPON_INVALID_REMOVED );

				// Remove the coupon
				$this->remove_coupon( $code );

				// Flag totals for refresh
				WC()->session->set( 'refresh_totals', true );
			}
		}
	}

	/**
	 * Get cart items quantities - merged so we can do accurate stock checks on items across multiple lines.
	 *
	 * @return array
	 */
	public function get_cart_item_quantities() {
		$quantities = array();

		foreach ( $this->get_cart() as $cart_item_key => $values ) {
			$product = $values['data'];
			$quantities[ $product->get_stock_managed_by_id() ] = isset( $quantities[ $product->get_stock_managed_by_id() ] ) ? $quantities[ $product->get_stock_managed_by_id() ] + $values['quantity'] : $values['quantity'];
		}

		return $quantities;
	}

	/**
	 * Looks through cart items and checks the posts are not trashed or deleted.
	 *
	 * @return bool|WP_Error
	 */
	public function check_cart_item_validity() {
		$return = true;

		foreach ( $this->get_cart() as $cart_item_key => $values ) {
			$product = $values['data'];

			if ( ! $product || ! $product->exists() || 'trash' === $product->get_status() ) {
				$this->set_quantity( $cart_item_key, 0 );
				$return = new WP_Error( 'invalid', __( 'An item which is no longer available was removed from your cart.', 'woocommerce' ) );
			}
		}

		return $return;
	}

	/**
	 * Looks through the cart to check each item is in stock. If not, add an error.
	 *
	 * @return bool|WP_Error
	 */
	public function check_cart_item_stock() {
		global $wpdb;

		$error               = new WP_Error();
		$product_qty_in_cart = $this->get_cart_item_quantities();

		// First stock check loop
		foreach ( $this->get_cart() as $cart_item_key => $values ) {
			$product = $values['data'];

			/**
			 * Check stock based on stock-status.
			 */
			if ( ! $product->is_in_stock() ) {
				/* translators: %s: product name */
				$error->add( 'out-of-stock', sprintf( __( 'Sorry, "%s" is not in stock. Please edit your cart and try again. We apologize for any inconvenience caused.', 'woocommerce' ), $product->get_name() ) );
				return $error;
			}

			if ( ! $product->managing_stock() ) {
				continue;
			}

			/**
			 * Check stock based on all items in the cart.
			 */
			if ( ! $product->has_enough_stock( $product_qty_in_cart[ $product->get_stock_managed_by_id() ] ) ) {
				/* translators: 1: product name 2: quantity in stock */
				$error->add( 'out-of-stock', sprintf( __( 'Sorry, we do not have enough "%1$s" in stock to fulfill your order (%2$s in stock). Please edit your cart and try again. We apologize for any inconvenience caused.', 'woocommerce' ), $product->get_name(), wc_format_stock_quantity_for_display( $product->get_stock_quantity(), $product ) ) );
				return $error;
			}

			/**
			 * Finally consider any held stock, from pending orders.
			 */
			if ( get_option( 'woocommerce_hold_stock_minutes' ) > 0 && ! $product->backorders_allowed() ) {
				$order_id   = isset( WC()->session->order_awaiting_payment ) ? absint( WC()->session->order_awaiting_payment ) : 0;
				$held_stock = $wpdb->get_var(
					$wpdb->prepare( "
						SELECT SUM( order_item_meta.meta_value ) AS held_qty
						FROM {$wpdb->posts} AS posts
						LEFT JOIN {$wpdb->prefix}woocommerce_order_items as order_items ON posts.ID = order_items.order_id
						LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta as order_item_meta ON order_items.order_item_id = order_item_meta.order_item_id
						LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta as order_item_meta2 ON order_items.order_item_id = order_item_meta2.order_item_id
						WHERE 	order_item_meta.meta_key   = '_qty'
						AND 	order_item_meta2.meta_key  = %s AND order_item_meta2.meta_value  = %d
						AND 	posts.post_type            IN ( '" . implode( "','", wc_get_order_types() ) . "' )
						AND 	posts.post_status          = 'wc-pending'
						AND		posts.ID                   != %d;",
						'variation' === get_post_type( $product->get_stock_managed_by_id() ) ? '_variation_id' : '_product_id',
						$product->get_stock_managed_by_id(),
						$order_id
					)
				);

				if ( $product->get_stock_quantity() < ( $held_stock + $product_qty_in_cart[ $product->get_stock_managed_by_id() ] ) ) {
					/* translators: 1: product name 2: minutes */
					$error->add( 'out-of-stock', sprintf( __( 'Sorry, we do not have enough "%1$s" in stock to fulfill your order right now. Please try again in %2$d minutes or edit your cart and try again. We apologize for any inconvenience caused.', 'woocommerce' ), $product->get_name(), get_option( 'woocommerce_hold_stock_minutes' ) ) );
					return $error;
				}
			}
		}

		return true;
	}

	/**
	 * Gets and formats a list of cart item data + variations for display on the frontend.
	 *
	 * @param array $cart_item
	 * @param bool $flat (default: false)
	 * @return string
	 */
	public function get_item_data( $cart_item, $flat = false ) {
		$item_data = array();

		// Variation values are shown only if they are not found in the title as of 3.0.
		// This is because variation titles display the attributes.
		if ( $cart_item['data']->is_type( 'variation' ) && is_array( $cart_item['variation'] ) ) {
			foreach ( $cart_item['variation'] as $name => $value ) {
				$taxonomy = wc_attribute_taxonomy_name( str_replace( 'attribute_pa_', '', urldecode( $name ) ) );

				// If this is a term slug, get the term's nice name
				if ( taxonomy_exists( $taxonomy ) ) {
					$term = get_term_by( 'slug', $value, $taxonomy );
					if ( ! is_wp_error( $term ) && $term && $term->name ) {
						$value = $term->name;
					}
					$label = wc_attribute_label( $taxonomy );

				// If this is a custom option slug, get the options name.
				} else {
					$value = apply_filters( 'woocommerce_variation_option_name', $value );
					$label = wc_attribute_label( str_replace( 'attribute_', '', $name ), $cart_item['data'] );
				}

				// Check the nicename against the title.
				if ( '' === $value || wc_is_attribute_in_product_name( $value, $cart_item['data']->get_name() ) ) {
					continue;
				}

				$item_data[] = array(
					'key'   => $label,
					'value' => $value,
				);
			}
		}

		// Filter item data to allow 3rd parties to add more to the array
		$item_data = apply_filters( 'woocommerce_get_item_data', $item_data, $cart_item );

		// Format item data ready to display
		foreach ( $item_data as $key => $data ) {
			// Set hidden to true to not display meta on cart.
			if ( ! empty( $data['hidden'] ) ) {
				unset( $item_data[ $key ] );
				continue;
			}
			$item_data[ $key ]['key']     = ! empty( $data['key'] ) ? $data['key'] : $data['name'];
			$item_data[ $key ]['display'] = ! empty( $data['display'] ) ? $data['display'] : $data['value'];
		}

		// Output flat or in list format
		if ( sizeof( $item_data ) > 0 ) {
			ob_start();

			if ( $flat ) {
				foreach ( $item_data as $data ) {
					echo esc_html( $data['key'] ) . ': ' . wp_kses_post( $data['display'] ) . "\n";
				}
			} else {
				wc_get_template( 'cart/cart-item-data.php', array( 'item_data' => $item_data ) );
			}

			return ob_get_clean();
		}

		return '';
	}

	/**
	 * Gets cross sells based on the items in the cart.
	 *
	 * @return array cross_sells (item ids)
	 */
	public function get_cross_sells() {
		$cross_sells = array();
		$in_cart     = array();
		if ( ! $this->is_empty() ) {
			foreach ( $this->get_cart() as $cart_item_key => $values ) {
				if ( $values['quantity'] > 0 ) {
					$cross_sells = array_merge( $values['data']->get_cross_sell_ids(), $cross_sells );
					$in_cart[]   = $values['product_id'];
				}
			}
		}
		$cross_sells = array_diff( $cross_sells, $in_cart );
		return wp_parse_id_list( $cross_sells );
	}

	/**
	 * Gets the url to the cart page.
	 *
	 * @deprecated 2.5.0 in favor to wc_get_cart_url()
	 *
	 * @return string url to page
	 */
	public function get_cart_url() {
		return wc_get_cart_url();
	}

	/**
	 * Gets the url to the checkout page.
	 *
	 * @deprecated 2.5.0 in favor to wc_get_checkout_url()
	 *
	 * @return string url to page
	 */
	public function get_checkout_url() {
		return wc_get_checkout_url();
	}

	/**
	 * Gets the url to remove an item from the cart.
	 *
	 * @param string $cart_item_key contains the id of the cart item
	 * @return string url to page
	 */
	public function get_remove_url( $cart_item_key ) {
		$cart_page_url = wc_get_page_permalink( 'cart' );
		return apply_filters( 'woocommerce_get_remove_url', $cart_page_url ? wp_nonce_url( add_query_arg( 'remove_item', $cart_item_key, $cart_page_url ), 'woocommerce-cart' ) : '' );
	}

	/**
	 * Gets the url to re-add an item into the cart.
	 *
	 * @param  string $cart_item_key
	 * @return string url to page
	 */
	public function get_undo_url( $cart_item_key ) {
		$cart_page_url = wc_get_page_permalink( 'cart' );

		$query_args = array(
			'undo_item' => $cart_item_key,
		);

		return apply_filters( 'woocommerce_get_undo_url', $cart_page_url ? wp_nonce_url( add_query_arg( $query_args, $cart_page_url ), 'woocommerce-cart' ) : '', $cart_item_key );
	}

	/**
	 * Returns the contents of the cart in an array.
	 *
	 * @return array contents of the cart
	 */
	public function get_cart() {
		if ( ! did_action( 'wp_loaded' ) ) {
			wc_doing_it_wrong( __FUNCTION__, __( 'Get cart should not be called before the wp_loaded action.', 'woocommerce' ), '2.3' );
		}
		if ( ! did_action( 'woocommerce_cart_loaded_from_session' ) ) {
			$this->get_cart_from_session();
		}
		return array_filter( (array) $this->cart_contents );
	}

	/**
	 * Returns the contents of the cart in an array without the 'data' element.
	 *
	 * @return array contents of the cart
	 */
	public function get_cart_for_session() {
		$cart_session = array();

		if ( $this->get_cart() ) {
			foreach ( $this->get_cart() as $key => $values ) {
				$cart_session[ $key ] = $values;
				unset( $cart_session[ $key ]['data'] ); // Unset product object
			}
		}

		return $cart_session;
	}

	/**
	 * Returns a specific item in the cart.
	 *
	 * @param string $item_key Cart item key.
	 * @return array Item data
	 */
	public function get_cart_item( $item_key ) {
		if ( isset( $this->cart_contents[ $item_key ] ) ) {
			return $this->cart_contents[ $item_key ];
		}

		return array();
	}

	/**
	 * Returns the cart and shipping taxes, merged.
	 *
	 * @return array merged taxes
	 */
	public function get_taxes() {
		$taxes = array();

		// Merge
		foreach ( array_keys( $this->taxes + $this->shipping_taxes ) as $key ) {
			$taxes[ $key ] = ( isset( $this->shipping_taxes[ $key ] ) ? $this->shipping_taxes[ $key ] : 0 ) + ( isset( $this->taxes[ $key ] ) ? $this->taxes[ $key ] : 0 );
		}

		return apply_filters( 'woocommerce_cart_get_taxes', $taxes, $this );
	}

	/**
	 * Get taxes, merged by code, formatted ready for output.
	 *
	 * @return array
	 */
	public function get_tax_totals() {
		$taxes      = $this->get_taxes();
		$tax_totals = array();

		foreach ( $taxes as $key => $tax ) {
			$code = WC_Tax::get_rate_code( $key );

			if ( $code || apply_filters( 'woocommerce_cart_remove_taxes_zero_rate_id', 'zero-rated' ) === $key ) {
				if ( ! isset( $tax_totals[ $code ] ) ) {
					$tax_totals[ $code ] = new stdClass();
					$tax_totals[ $code ]->amount = 0;
				}
				$tax_totals[ $code ]->tax_rate_id       = $key;
				$tax_totals[ $code ]->is_compound       = WC_Tax::is_compound( $key );
				$tax_totals[ $code ]->label             = WC_Tax::get_rate_label( $key );
				$tax_totals[ $code ]->amount           += wc_round_tax_total( $tax );
				$tax_totals[ $code ]->formatted_amount  = wc_price( wc_round_tax_total( $tax_totals[ $code ]->amount ) );
			}
		}

		if ( apply_filters( 'woocommerce_cart_hide_zero_taxes', true ) ) {
			$amounts    = array_filter( wp_list_pluck( $tax_totals, 'amount' ) );
			$tax_totals = array_intersect_key( $tax_totals, $amounts );
		}

		return apply_filters( 'woocommerce_cart_tax_totals', $tax_totals, $this );
	}

	/**
	 * Get all tax classes for items in the cart.
	 * @return array
	 */
	public function get_cart_item_tax_classes() {
		$found_tax_classes = array();

		foreach ( WC()->cart->get_cart() as $item ) {
			$found_tax_classes[] = $item['data']->get_tax_class();
		}

		return array_unique( $found_tax_classes );
	}

	/**
	 * Determines the value that the customer spent and the subtotal
	 * displayed, used for things like coupon validation.
	 *
	 * Since the coupon lines are displayed based on the TAX DISPLAY value
	 * of cart, this is used to determine the spend.
	 *
	 * If cart totals are shown including tax, use the subtotal.
	 * If cart totals are shown excluding tax, use the subtotal ex tax
	 * (tax is shown after coupons).
	 *
	 * @since 2.6.0
	 * @return string
	 */
	public function get_displayed_subtotal() {
		if ( 'incl' === $this->tax_display_cart ) {
			return wc_format_decimal( $this->subtotal );
		} elseif ( 'excl' === $this->tax_display_cart ) {
			return wc_format_decimal( $this->subtotal_ex_tax );
		}
	}

	/*
	 * Add to cart handling.
	 */

	/**
	 * Check if product is in the cart and return cart item key.
	 *
	 * Cart item key will be unique based on the item and its properties, such as variations.
	 *
	 * @param mixed id of product to find in the cart
	 * @return string cart item key
	 */
	public function find_product_in_cart( $cart_id = false ) {
		if ( false !== $cart_id ) {
			if ( is_array( $this->cart_contents ) && isset( $this->cart_contents[ $cart_id ] ) ) {
				return $cart_id;
			}
		}
		return '';
	}

	/**
	 * Generate a unique ID for the cart item being added.
	 *
	 * @param int $product_id - id of the product the key is being generated for
	 * @param int $variation_id of the product the key is being generated for
	 * @param array $variation data for the cart item
	 * @param array $cart_item_data other cart item data passed which affects this items uniqueness in the cart
	 * @return string cart item key
	 */
	public function generate_cart_id( $product_id, $variation_id = 0, $variation = array(), $cart_item_data = array() ) {
		$id_parts = array( $product_id );

		if ( $variation_id && 0 != $variation_id ) {
			$id_parts[] = $variation_id;
		}

		if ( is_array( $variation ) && ! empty( $variation ) ) {
			$variation_key = '';
			foreach ( $variation as $key => $value ) {
				$variation_key .= trim( $key ) . trim( $value );
			}
			$id_parts[] = $variation_key;
		}

		if ( is_array( $cart_item_data ) && ! empty( $cart_item_data ) ) {
			$cart_item_data_key = '';
			foreach ( $cart_item_data as $key => $value ) {
				if ( is_array( $value ) || is_object( $value ) ) {
					$value = http_build_query( $value );
				}
				$cart_item_data_key .= trim( $key ) . trim( $value );

			}
			$id_parts[] = $cart_item_data_key;
		}

		return apply_filters( 'woocommerce_cart_id', md5( implode( '_', $id_parts ) ), $product_id, $variation_id, $variation, $cart_item_data );
	}

	/**
	 * Add a product to the cart.
	 *
	 * @param int $product_id contains the id of the product to add to the cart
	 * @param int $quantity contains the quantity of the item to add
	 * @param int $variation_id
	 * @param array $variation attribute values
	 * @param array $cart_item_data extra cart item data we want to pass into the item
	 * @return string|bool $cart_item_key
	 */
	public function add_to_cart( $product_id = 0, $quantity = 1, $variation_id = 0, $variation = array(), $cart_item_data = array() ) {
		// Wrap in try catch so plugins can throw an exception to prevent adding to cart
		try {
			$product_id   = absint( $product_id );
			$variation_id = absint( $variation_id );

			// Ensure we don't add a variation to the cart directly by variation ID
			if ( 'product_variation' === get_post_type( $product_id ) ) {
				$variation_id = $product_id;
				$product_id   = wp_get_post_parent_id( $variation_id );
			}

			// Get the product
			$product_data = wc_get_product( $variation_id ? $variation_id : $product_id );

			// Filter quantity being added to the cart before stock checks
			$quantity     = apply_filters( 'woocommerce_add_to_cart_quantity', $quantity, $product_id );

			// Sanity check
			if ( $quantity <= 0 || ! $product_data || 'trash' === $product_data->get_status() ) {
				return false;
			}

			// Load cart item data - may be added by other plugins
			$cart_item_data = (array) apply_filters( 'woocommerce_add_cart_item_data', $cart_item_data, $product_id, $variation_id );

			// Generate a ID based on product ID, variation ID, variation data, and other cart item data
			$cart_id        = $this->generate_cart_id( $product_id, $variation_id, $variation, $cart_item_data );

			// Find the cart item key in the existing cart
			$cart_item_key  = $this->find_product_in_cart( $cart_id );

			// Force quantity to 1 if sold individually and check for existing item in cart
			if ( $product_data->is_sold_individually() ) {
				$quantity      = apply_filters( 'woocommerce_add_to_cart_sold_individually_quantity', 1, $quantity, $product_id, $variation_id, $cart_item_data );
				$found_in_cart = apply_filters( 'woocommerce_add_to_cart_sold_individually_found_in_cart', $cart_item_key && $this->cart_contents[ $cart_item_key ]['quantity'] > 0, $product_id, $variation_id, $cart_item_data, $cart_id );

				if ( $found_in_cart ) {
					/* translators: %s: product name */
					throw new Exception( sprintf( '<a href="%s" class="button wc-forward">%s</a> %s', wc_get_cart_url(), __( 'View cart', 'woocommerce' ), sprintf( __( 'You cannot add another "%s" to your cart.', 'woocommerce' ), $product_data->get_name() ) ) );
				}
			}

			// Check product is_purchasable
			if ( ! $product_data->is_purchasable() ) {
				throw new Exception( __( 'Sorry, this product cannot be purchased.', 'woocommerce' ) );
			}

			// Stock check - only check if we're managing stock and backorders are not allowed
			if ( ! $product_data->is_in_stock() ) {
				throw new Exception( sprintf( __( 'You cannot add &quot;%s&quot; to the cart because the product is out of stock.', 'woocommerce' ), $product_data->get_name() ) );
			}

			if ( ! $product_data->has_enough_stock( $quantity ) ) {
				/* translators: 1: product name 2: quantity in stock */
				throw new Exception( sprintf( __( 'You cannot add that amount of &quot;%1$s&quot; to the cart because there is not enough stock (%2$s remaining).', 'woocommerce' ), $product_data->get_name(), wc_format_stock_quantity_for_display( $product_data->get_stock_quantity(), $product_data ) ) );
			}

			// Stock check - this time accounting for whats already in-cart
			if ( $product_data->managing_stock() ) {
				$products_qty_in_cart = $this->get_cart_item_quantities();

				if ( isset( $products_qty_in_cart[ $product_data->get_stock_managed_by_id() ] ) && ! $product_data->has_enough_stock( $products_qty_in_cart[ $product_data->get_stock_managed_by_id() ] + $quantity ) ) {
					throw new Exception( sprintf(
						'<a href="%s" class="button wc-forward">%s</a> %s',
						wc_get_cart_url(),
						__( 'View Cart', 'woocommerce' ),
						sprintf( __( 'You cannot add that amount to the cart &mdash; we have %1$s in stock and you already have %2$s in your cart.', 'woocommerce' ), wc_format_stock_quantity_for_display( $product_data->get_stock_quantity(), $product_data ), wc_format_stock_quantity_for_display( $products_qty_in_cart[ $product_data->get_stock_managed_by_id() ], $product_data ) )
					) );
				}
			}

			// If cart_item_key is set, the item is already in the cart
			if ( $cart_item_key ) {
				$new_quantity = $quantity + $this->cart_contents[ $cart_item_key ]['quantity'];
				$this->set_quantity( $cart_item_key, $new_quantity, false );
			} else {
				$cart_item_key = $cart_id;

				// Add item after merging with $cart_item_data - hook to allow plugins to modify cart item
				$this->cart_contents[ $cart_item_key ] = apply_filters( 'woocommerce_add_cart_item', array_merge( $cart_item_data, array(
					'product_id'	=> $product_id,
					'variation_id'	=> $variation_id,
					'variation' 	=> $variation,
					'quantity' 		=> $quantity,
					'data'			=> $product_data,
				) ), $cart_item_key );
			}

			if ( did_action( 'wp' ) ) {
				$this->set_cart_cookies( ! $this->is_empty() );
			}

			do_action( 'woocommerce_add_to_cart', $cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data );

			return $cart_item_key;

		} catch ( Exception $e ) {
			if ( $e->getMessage() ) {
				wc_add_notice( $e->getMessage(), 'error' );
			}
			return false;
		}
	}

	/**
	 * Remove a cart item.
	 *
	 * @since  2.3.0
	 * @param  string $cart_item_key
	 * @return bool
	 */
	public function remove_cart_item( $cart_item_key ) {
		if ( isset( $this->cart_contents[ $cart_item_key ] ) ) {
			$this->removed_cart_contents[ $cart_item_key ] = $this->cart_contents[ $cart_item_key ];
			unset( $this->removed_cart_contents[ $cart_item_key ]['data'] );

			do_action( 'woocommerce_remove_cart_item', $cart_item_key, $this );

			unset( $this->cart_contents[ $cart_item_key ] );

			do_action( 'woocommerce_cart_item_removed', $cart_item_key, $this );

			$this->calculate_totals();

			return true;
		}

		return false;
	}

	/**
	 * Restore a cart item.
	 *
	 * @param  string $cart_item_key
	 * @return bool
	 */
	public function restore_cart_item( $cart_item_key ) {
		if ( isset( $this->removed_cart_contents[ $cart_item_key ] ) ) {
			$this->cart_contents[ $cart_item_key ] = $this->removed_cart_contents[ $cart_item_key ];
			$this->cart_contents[ $cart_item_key ]['data'] = wc_get_product( $this->cart_contents[ $cart_item_key ]['variation_id'] ? $this->cart_contents[ $cart_item_key ]['variation_id'] : $this->cart_contents[ $cart_item_key ]['product_id'] );

			do_action( 'woocommerce_restore_cart_item', $cart_item_key, $this );

			unset( $this->removed_cart_contents[ $cart_item_key ] );

			do_action( 'woocommerce_cart_item_restored', $cart_item_key, $this );

			$this->calculate_totals();

			return true;
		}

		return false;
	}

	/**
	 * Set the quantity for an item in the cart.
	 *
	 * @param string	$cart_item_key	contains the id of the cart item
	 * @param int		$quantity		contains the quantity of the item
	 * @param bool      $refresh_totals	whether or not to calculate totals after setting the new qty
	 *
	 * @return bool
	 */
	public function set_quantity( $cart_item_key, $quantity = 1, $refresh_totals = true ) {
		if ( 0 == $quantity || $quantity < 0 ) {
			do_action( 'woocommerce_before_cart_item_quantity_zero', $cart_item_key );
			unset( $this->cart_contents[ $cart_item_key ] );
		} else {
			$old_quantity = $this->cart_contents[ $cart_item_key ]['quantity'];
			$this->cart_contents[ $cart_item_key ]['quantity'] = $quantity;
			do_action( 'woocommerce_after_cart_item_quantity_update', $cart_item_key, $quantity, $old_quantity );
		}

		if ( $refresh_totals ) {
			$this->calculate_totals();
		}

		return true;
	}

	/*
	 * Cart Calculation Functions.
	 */

	/**
	 * Reset cart totals to the defaults. Useful before running calculations.
	 *
	 * @param  bool  	$unset_session If true, the session data will be forced unset.
	 * @access private
	 */
	private function reset( $unset_session = false ) {
		foreach ( $this->cart_session_data as $key => $default ) {
			$this->$key = $default;
			if ( $unset_session ) {
				unset( WC()->session->$key );
			}
		}
		do_action( 'woocommerce_cart_reset', $this, $unset_session );
	}

	/**
	 * Sort by subtotal.
	 * @param  array $a
	 * @param  array $b
	 * @return int
	 */
	private function sort_by_subtotal( $a, $b ) {
		$first_item_subtotal  = isset( $a['line_subtotal'] ) ? $a['line_subtotal'] : 0;
		$second_item_subtotal = isset( $b['line_subtotal'] ) ? $b['line_subtotal'] : 0;
		if ( $first_item_subtotal === $second_item_subtotal ) {
			return 0;
		}
		return ( $first_item_subtotal < $second_item_subtotal ) ? 1 : -1;
	}

	/**
	 * Calculate totals for the items in the cart.
	 */
	public function calculate_totals() {
		$this->reset();
		$this->coupons = $this->get_coupons();

		do_action( 'woocommerce_before_calculate_totals', $this );

		if ( $this->is_empty() ) {
			$this->set_session();
			return;
		}

		$tax_rates      = array();
		$shop_tax_rates = array();
		$cart           = $this->get_cart();

		/**
		 * Calculate subtotals for items. This is done first so that discount logic can use the values.
		 */
		foreach ( $cart as $cart_item_key => $values ) {
			$product           = $values['data'];
			$line_price        = $product->get_price() * $values['quantity'];
			$line_subtotal     = 0;
			$line_subtotal_tax = 0;

			/**
			 * No tax to calculate.
			 */
			if ( ! $product->is_taxable() ) {

				// Subtotal is the undiscounted price
				$this->subtotal += $line_price;
				$this->subtotal_ex_tax += $line_price;

			/**
			 * Prices include tax.
			 *
			 * To prevent rounding issues we need to work with the inclusive price where possible.
			 * otherwise we'll see errors such as when working with a 9.99 inc price, 20% VAT which would.
			 * be 8.325 leading to totals being 1p off.
			 *
			 * Pre tax coupons come off the price the customer thinks they are paying - tax is calculated.
			 * afterwards.
			 *
			 * e.g. $100 bike with $10 coupon = customer pays $90 and tax worked backwards from that.
			 */
			} elseif ( $this->prices_include_tax ) {

				// Get base tax rates
				if ( empty( $shop_tax_rates[ $product->get_tax_class( 'unfiltered' ) ] ) ) {
					$shop_tax_rates[ $product->get_tax_class( 'unfiltered' ) ] = WC_Tax::get_base_tax_rates( $product->get_tax_class( 'unfiltered' ) );
				}

				// Get item tax rates
				if ( empty( $tax_rates[ $product->get_tax_class() ] ) ) {
					$tax_rates[ $product->get_tax_class() ] = WC_Tax::get_rates( $product->get_tax_class() );
				}

				$base_tax_rates = $shop_tax_rates[ $product->get_tax_class( 'unfiltered' ) ];
				$item_tax_rates = $tax_rates[ $product->get_tax_class() ];

				/**
				 * ADJUST TAX - Calculations when base tax is not equal to the item tax.
				 *
					 * The woocommerce_adjust_non_base_location_prices filter can stop base taxes being taken off when dealing with out of base locations.
					 * e.g. If a product costs 10 including tax, all users will pay 10 regardless of location and taxes.
					 * This feature is experimental @since 2.4.7 and may change in the future. Use at your risk.
					 */
				if ( $item_tax_rates !== $base_tax_rates && apply_filters( 'woocommerce_adjust_non_base_location_prices', true ) ) {

					// Work out a new base price without the shop's base tax
					$taxes                 = WC_Tax::calc_tax( $line_price, $base_tax_rates, true, true );

					// Now we have a new item price (excluding TAX)
					$line_subtotal         = $line_price - array_sum( $taxes );

					// Now add modified taxes
					$tax_result            = WC_Tax::calc_tax( $line_subtotal, $item_tax_rates );
					$line_subtotal_tax     = array_sum( $tax_result );

				/**
				 * Regular tax calculation (customer inside base and the tax class is unmodified.
				 */
				} else {

					// Calc tax normally
					$taxes                 = WC_Tax::calc_tax( $line_price, $item_tax_rates, true );
					$line_subtotal_tax     = array_sum( $taxes );
					$line_subtotal         = $line_price - array_sum( $taxes );
				}

			/**
			 * Prices exclude tax.
			 *
			 * This calculation is simpler - work with the base, untaxed price.
			 */
			} else {

				// Get item tax rates
				if ( empty( $tax_rates[ $product->get_tax_class() ] ) ) {
					$tax_rates[ $product->get_tax_class() ] = WC_Tax::get_rates( $product->get_tax_class() );
				}

				$item_tax_rates        = $tax_rates[ $product->get_tax_class() ];

				// Base tax for line before discount - we will store this in the order data
				$taxes                 = WC_Tax::calc_tax( $line_price, $item_tax_rates );
				$line_subtotal_tax     = array_sum( $taxes );

				$line_subtotal         = $line_price;
			}

			// Add to main subtotal
			$this->subtotal        += $line_subtotal + $line_subtotal_tax;
			$this->subtotal_ex_tax += $line_subtotal;
		}

		// Order cart items by price so coupon logic is 'fair' for customers and not based on order added to cart.
		uasort( $cart, apply_filters( 'woocommerce_sort_by_subtotal_callback', array( $this, 'sort_by_subtotal' ) ) );

		/**
		 * Calculate totals for items.
		 */
		foreach ( $cart as $cart_item_key => $values ) {

			$product = $values['data'];

			// Prices
			$base_price = $product->get_price();
			$line_price = $product->get_price() * $values['quantity'];

			// Tax data
			$taxes = array();
			$discounted_taxes = array();

			/**
			 * No tax to calculate.
			 */
			if ( ! $product->is_taxable() ) {

				// Discounted Price (price with any pre-tax discounts applied)
				$discounted_price      = $this->get_discounted_price( $values, $base_price, true );
				$line_subtotal_tax     = 0;
				$line_subtotal         = $line_price;
				$line_tax              = 0;
				$line_total            = round( $discounted_price * $values['quantity'], wc_get_rounding_precision() );

			/**
			 * Prices include tax.
			 */
			} elseif ( $this->prices_include_tax ) {

				$base_tax_rates = $shop_tax_rates[ $product->get_tax_class( 'unfiltered' ) ];
				$item_tax_rates = $tax_rates[ $product->get_tax_class() ];

				/**
				 * ADJUST TAX - Calculations when base tax is not equal to the item tax.
				 *
					 * The woocommerce_adjust_non_base_location_prices filter can stop base taxes being taken off when dealing with out of base locations.
					 * e.g. If a product costs 10 including tax, all users will pay 10 regardless of location and taxes.
					 * This feature is experimental @since 2.4.7 and may change in the future. Use at your risk.
					 */
				if ( $item_tax_rates !== $base_tax_rates && apply_filters( 'woocommerce_adjust_non_base_location_prices', true ) ) {

					// Work out a new base price without the shop's base tax
					$taxes             = WC_Tax::calc_tax( $line_price, $base_tax_rates, true, true );

					// Now we have a new item price (excluding TAX)
					$line_subtotal     = round( $line_price - array_sum( $taxes ), wc_get_rounding_precision() );
					$taxes             = WC_Tax::calc_tax( $line_subtotal, $item_tax_rates );
					$line_subtotal_tax = array_sum( $taxes );

					// Adjusted price (this is the price including the new tax rate)
					$adjusted_price    = ( $line_subtotal + $line_subtotal_tax ) / $values['quantity'];

					// Apply discounts and get the discounted price FOR A SINGLE ITEM
					$discounted_price  = $this->get_discounted_price( $values, $adjusted_price, true );

					// Convert back to line price
					$discounted_line_price = $discounted_price * $values['quantity'];

					// Now use rounded line price to get taxes.
					$discounted_taxes  = WC_Tax::calc_tax( $discounted_line_price, $item_tax_rates, true );
					$line_tax          = array_sum( $discounted_taxes );
					$line_total        = $discounted_line_price - $line_tax;

				/**
				 * Regular tax calculation (customer inside base and the tax class is unmodified.
				 */
				} else {

					// Work out a new base price without the item tax
					$taxes             = WC_Tax::calc_tax( $line_price, $item_tax_rates, true );

					// Now we have a new item price (excluding TAX)
					$line_subtotal     = $line_price - array_sum( $taxes );
					$line_subtotal_tax = array_sum( $taxes );

					// Calc prices and tax (discounted)
					$discounted_price = $this->get_discounted_price( $values, $base_price, true );

					// Convert back to line price
					$discounted_line_price = $discounted_price * $values['quantity'];

					// Now use rounded line price to get taxes.
					$discounted_taxes  = WC_Tax::calc_tax( $discounted_line_price, $item_tax_rates, true );
					$line_tax          = array_sum( $discounted_taxes );
					$line_total        = $discounted_line_price - $line_tax;
				}

				// Tax rows - merge the totals we just got
				foreach ( array_keys( $this->taxes + $discounted_taxes ) as $key ) {
					$this->taxes[ $key ] = ( isset( $discounted_taxes[ $key ] ) ? $discounted_taxes[ $key ] : 0 ) + ( isset( $this->taxes[ $key ] ) ? $this->taxes[ $key ] : 0 );
				}

			/**
			 * Prices exclude tax.
			 */
			} else {

				$item_tax_rates        = $tax_rates[ $product->get_tax_class() ];

				// Work out a new base price without the shop's base tax
				$taxes                 = WC_Tax::calc_tax( $line_price, $item_tax_rates );

				// Now we have the item price (excluding TAX)
				$line_subtotal         = $line_price;
				$line_subtotal_tax     = array_sum( $taxes );

				// Now calc product rates
				$discounted_price      = $this->get_discounted_price( $values, $base_price, true );
				$discounted_taxes      = WC_Tax::calc_tax( $discounted_price * $values['quantity'], $item_tax_rates );
				$discounted_tax_amount = array_sum( $discounted_taxes );
				$line_tax              = $discounted_tax_amount;
				$line_total            = $discounted_price * $values['quantity'];

				// Tax rows - merge the totals we just got
				foreach ( array_keys( $this->taxes + $discounted_taxes ) as $key ) {
					$this->taxes[ $key ] = ( isset( $discounted_taxes[ $key ] ) ? $discounted_taxes[ $key ] : 0 ) + ( isset( $this->taxes[ $key ] ) ? $this->taxes[ $key ] : 0 );
				}
			}

			// Cart contents total is based on discounted prices and is used for the final total calculation
			$this->cart_contents_total += $line_total;

			/**
			 * Store costs + taxes for lines. For tax inclusive prices, we do some extra rounding logic so the stored
			 * values "add up" when viewing the order in admin. This does have the disadvatage of not being able to
			 * recalculate the tax total/subtotal accurately in the future, but it does ensure the data looks correct.
			 *
			 * Tax exclusive prices are not affected.
			 */
			if ( ! $product->is_taxable() || $this->prices_include_tax ) {
				$this->cart_contents[ $cart_item_key ]['line_total']        = round( $line_total + $line_tax - wc_round_tax_total( $line_tax ), $this->dp );
				$this->cart_contents[ $cart_item_key ]['line_subtotal']     = round( $line_subtotal + $line_subtotal_tax - wc_round_tax_total( $line_subtotal_tax ), $this->dp );
				$this->cart_contents[ $cart_item_key ]['line_tax']          = wc_round_tax_total( $line_tax );
				$this->cart_contents[ $cart_item_key ]['line_subtotal_tax'] = wc_round_tax_total( $line_subtotal_tax );
				$this->cart_contents[ $cart_item_key ]['line_tax_data']     = array( 'total' => array_map( 'wc_round_tax_total', $discounted_taxes ), 'subtotal' => array_map( 'wc_round_tax_total', $taxes ) );
			} else {
				$this->cart_contents[ $cart_item_key ]['line_total']        = $line_total;
				$this->cart_contents[ $cart_item_key ]['line_subtotal']     = $line_subtotal;
				$this->cart_contents[ $cart_item_key ]['line_tax']          = $line_tax;
				$this->cart_contents[ $cart_item_key ]['line_subtotal_tax'] = $line_subtotal_tax;
				$this->cart_contents[ $cart_item_key ]['line_tax_data']     = array( 'total' => $discounted_taxes, 'subtotal' => $taxes );
			}
		}

		// Only calculate the grand total + shipping if on the cart/checkout
		if ( is_checkout() || is_cart() || defined( 'WOOCOMMERCE_CHECKOUT' ) || defined( 'WOOCOMMERCE_CART' ) ) {

			// Calculate the Shipping.
			$local_pickup_methods = apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) );
			$had_local_pickup     = 0 < count( array_intersect( wc_get_chosen_shipping_method_ids(), $local_pickup_methods ) );
			$this->calculate_shipping();
			$has_local_pickup     = 0 < count( array_intersect( wc_get_chosen_shipping_method_ids(), $local_pickup_methods ) );

			// If methods changed and local pickup is selected, we need to do a recalculation of taxes.
			if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && $had_local_pickup !== $has_local_pickup ) {
				return $this->calculate_totals();
			}

			// Trigger the fees API where developers can add fees to the cart
			$this->calculate_fees();

			// Total up/round taxes and shipping taxes
			if ( $this->round_at_subtotal ) {
				$this->tax_total          = WC_Tax::get_tax_total( $this->taxes );
				$this->shipping_tax_total = WC_Tax::get_tax_total( $this->shipping_taxes );
				$this->taxes              = array_map( array( 'WC_Tax', 'round' ), $this->taxes );
				$this->shipping_taxes     = array_map( array( 'WC_Tax', 'round' ), $this->shipping_taxes );
			} else {
				$this->tax_total          = array_sum( $this->taxes );
				$this->shipping_tax_total = array_sum( $this->shipping_taxes );
			}

			// VAT exemption done at this point - so all totals are correct before exemption
			if ( WC()->customer->get_is_vat_exempt() ) {
				$this->remove_taxes();
			}

			// Allow plugins to hook and alter totals before final total is calculated
			do_action( 'woocommerce_calculate_totals', $this );

			// Grand Total - Discounted product prices, discounted tax, shipping cost + tax
			$this->total = max( 0, apply_filters( 'woocommerce_calculated_total', round( $this->cart_contents_total + $this->tax_total + $this->shipping_tax_total + $this->shipping_total + $this->fee_total, $this->dp ), $this ) );

		} else {

			// Set tax total to sum of all tax rows
			$this->tax_total = WC_Tax::get_tax_total( $this->taxes );

			// VAT exemption done at this point - so all totals are correct before exemption
			if ( WC()->customer->get_is_vat_exempt() ) {
				$this->remove_taxes();
			}
		}

		do_action( 'woocommerce_after_calculate_totals', $this );

		$this->set_session();
	}

	/**
	 * Remove taxes.
	 */
	public function remove_taxes() {
		$this->shipping_tax_total = $this->tax_total = 0;
		$this->subtotal           = $this->subtotal_ex_tax;

		foreach ( $this->cart_contents as $cart_item_key => $item ) {
			$this->cart_contents[ $cart_item_key ]['line_subtotal_tax'] = $this->cart_contents[ $cart_item_key ]['line_tax'] = 0;
			$this->cart_contents[ $cart_item_key ]['line_tax_data']     = array( 'total' => array(), 'subtotal' => array() );
		}

		// If true, zero rate is applied so '0' tax is displayed on the frontend rather than nothing.
		if ( apply_filters( 'woocommerce_cart_remove_taxes_apply_zero_rate', true ) ) {
			$this->taxes = $this->shipping_taxes = array( apply_filters( 'woocommerce_cart_remove_taxes_zero_rate_id', 'zero-rated' ) => 0 );
		} else {
			$this->taxes = $this->shipping_taxes = array();
		}
	}

	/**
	 * Looks at the totals to see if payment is actually required.
	 *
	 * @return bool
	 */
	public function needs_payment() {
		return apply_filters( 'woocommerce_cart_needs_payment', $this->total > 0, $this );
	}

	/*
	 * Shipping related functions.
	 */

	/**
	 * Uses the shipping class to calculate shipping then gets the totals when its finished.
	 */
	public function calculate_shipping() {
		if ( $this->needs_shipping() && $this->show_shipping() ) {
			WC()->shipping->calculate_shipping( $this->get_shipping_packages() );
		} else {
			WC()->shipping->reset_shipping();
		}

		// Get totals for the chosen shipping method
		$this->shipping_total 		= WC()->shipping->shipping_total;	// Shipping Total
		$this->shipping_taxes		= WC()->shipping->shipping_taxes;	// Shipping Taxes
	}

	/**
	 * Filter items needing shipping callback.
	 *
	 * @since  3.0.0
	 * @param  array $item
	 * @return bool
	 */
	protected function filter_items_needing_shipping( $item ) {
		$product = $item['data'];
		return $product && $product->needs_shipping();
	}

	/**
	 * Get only items that need shipping.
	 *
	 * @since  3.0.0
	 * @return array
	 */
	protected function get_items_needing_shipping() {
		return array_filter( $this->get_cart(), array( $this, 'filter_items_needing_shipping' ) );
	}

	/**
	 * Get packages to calculate shipping for.
	 *
	 * This lets us calculate costs for carts that are shipped to multiple locations.
	 *
	 * Shipping methods are responsible for looping through these packages.
	 *
	 * By default we pass the cart itself as a package - plugins can change this.
	 * through the filter and break it up.
	 *
	 * @since 1.5.4
	 * @return array of cart items
	 */
	public function get_shipping_packages() {
		return apply_filters( 'woocommerce_cart_shipping_packages',
			array(
				array(
					'contents'        => $this->get_items_needing_shipping(),
					'contents_cost'   => array_sum( wp_list_pluck( $this->get_items_needing_shipping(), 'line_total' ) ),
					'applied_coupons' => $this->applied_coupons,
					'user'            => array(
						'ID' => get_current_user_id(),
					),
					'destination'     => array(
						'country'   => WC()->customer->get_shipping_country(),
						'state'     => WC()->customer->get_shipping_state(),
						'postcode'  => WC()->customer->get_shipping_postcode(),
						'city'      => WC()->customer->get_shipping_city(),
						'address'   => WC()->customer->get_shipping_address(),
						'address_2' => WC()->customer->get_shipping_address_2(),
					),
				),
			)
		);
	}

	/**
	 * Looks through the cart to see if shipping is actually required.
	 *
	 * @return bool whether or not the cart needs shipping
	 */
	public function needs_shipping() {
		if ( ! wc_shipping_enabled() || 0 === wc_get_shipping_method_count( true ) ) {
			return false;
		}
		$needs_shipping = false;

		if ( ! empty( $this->cart_contents ) ) {
			foreach ( $this->cart_contents as $cart_item_key => $values ) {
				if ( $values['data']->needs_shipping() ) {
					$needs_shipping = true;
					break;
				}
			}
		}

		return apply_filters( 'woocommerce_cart_needs_shipping', $needs_shipping );
	}

	/**
	 * Should the shipping address form be shown.
	 *
	 * @return bool
	 */
	public function needs_shipping_address() {

		$needs_shipping_address = false;

		if ( $this->needs_shipping() === true && ! wc_ship_to_billing_address_only() ) {
			$needs_shipping_address = true;
		}

		return apply_filters( 'woocommerce_cart_needs_shipping_address', $needs_shipping_address );
	}

	/**
	 * Sees if the customer has entered enough data to calc the shipping yet.
	 *
	 * @return bool
	 */
	public function show_shipping() {
		if ( ! wc_shipping_enabled() || ! is_array( $this->cart_contents ) ) {
			return false;
		}

		if ( 'yes' === get_option( 'woocommerce_shipping_cost_requires_address' ) ) {
			if ( ! WC()->customer->has_calculated_shipping() ) {
				if ( ! WC()->customer->get_shipping_country() || ( ! WC()->customer->get_shipping_state() && ! WC()->customer->get_shipping_postcode() ) ) {
					return false;
				}
			}
		}

		return apply_filters( 'woocommerce_cart_ready_to_calc_shipping', true );
	}

	/**
	 * Sees if we need a shipping address.
	 *
	 * @deprecated 2.5.0 in favor to wc_ship_to_billing_address_only()
	 *
	 * @return bool
	 */
	public function ship_to_billing_address_only() {
		return wc_ship_to_billing_address_only();
	}

	/**
	 * Gets the shipping total (after calculation).
	 *
	 * @return string price or string for the shipping total
	 */
	public function get_cart_shipping_total() {
		if ( isset( $this->shipping_total ) ) {
			if ( $this->shipping_total > 0 ) {

				// Display varies depending on settings
				if ( 'excl' === $this->tax_display_cart ) {

					$return = wc_price( $this->shipping_total );

					if ( $this->shipping_tax_total > 0 && $this->prices_include_tax ) {
						$return .= ' <small class="tax_label">' . WC()->countries->ex_tax_or_vat() . '</small>';
					}

					return $return;

				} else {

					$return = wc_price( $this->shipping_total + $this->shipping_tax_total );

					if ( $this->shipping_tax_total > 0 && ! $this->prices_include_tax ) {
						$return .= ' <small class="tax_label">' . WC()->countries->inc_tax_or_vat() . '</small>';
					}

					return $return;

				}
			} else {
				return __( 'Free!', 'woocommerce' );
			}
		}

		return '';
	}

	/*
	 * Coupons/Discount related functions.
	 */

	/**
	 * Check for user coupons (now that we have billing email). If a coupon is invalid, add an error.
	 *
	 * Checks two types of coupons:
	 *  1. Where a list of customer emails are set (limits coupon usage to those defined).
	 *  2. Where a usage_limit_per_user is set (limits coupon usage to a number based on user ID and email).
	 *
	 * @param array $posted
	 */
	public function check_customer_coupons( $posted ) {
		if ( ! empty( $this->applied_coupons ) ) {
			foreach ( $this->applied_coupons as $code ) {
				$coupon = new WC_Coupon( $code );

				if ( $coupon->is_valid() ) {

					// Limit to defined email addresses
					if ( is_array( $coupon->get_email_restrictions() ) && sizeof( $coupon->get_email_restrictions() ) > 0 ) {
						$check_emails           = array();
						if ( is_user_logged_in() ) {
							$current_user   = wp_get_current_user();
							$check_emails[] = $current_user->user_email;
						}
						$check_emails[] = $posted['billing_email'];
						$check_emails   = array_map( 'sanitize_email', array_map( 'strtolower', $check_emails ) );

						if ( 0 == sizeof( array_intersect( $check_emails, $coupon->get_email_restrictions() ) ) ) {
							$coupon->add_coupon_message( WC_Coupon::E_WC_COUPON_NOT_YOURS_REMOVED );

							// Remove the coupon
							$this->remove_coupon( $code );

							// Flag totals for refresh
							WC()->session->set( 'refresh_totals', true );
						}
					}

					// Usage limits per user - check against billing and user email and user ID
					if ( $coupon->get_usage_limit_per_user() > 0 ) {
						$check_emails = array();
						$used_by      = $coupon->get_used_by();

						if ( is_user_logged_in() ) {
							$current_user   = wp_get_current_user();
							$check_emails[] = sanitize_email( $current_user->user_email );
							$usage_count    = sizeof( array_keys( $used_by, get_current_user_id() ) );
						} else {
							$check_emails[] = sanitize_email( $posted['billing_email'] );
							$user           = get_user_by( 'email', $posted['billing_email'] );
							if ( $user ) {
								$usage_count = sizeof( array_keys( $used_by, $user->ID ) );
							} else {
								$usage_count = 0;
							}
						}

						foreach ( $check_emails as $check_email ) {
							$usage_count = $usage_count + sizeof( array_keys( $used_by, $check_email ) );
						}

						if ( $usage_count >= $coupon->get_usage_limit_per_user() ) {
							$coupon->add_coupon_message( WC_Coupon::E_WC_COUPON_USAGE_LIMIT_REACHED );

							// Remove the coupon
							$this->remove_coupon( $code );

							// Flag totals for refresh
							WC()->session->set( 'refresh_totals', true );
						}
					}
				}
			}
		}
	}

	/**
	 * Returns whether or not a discount has been applied.
	 * @param string $coupon_code
	 * @return bool
	 */
	public function has_discount( $coupon_code = '' ) {
		return $coupon_code ? in_array( wc_format_coupon_code( $coupon_code ), $this->applied_coupons ) : sizeof( $this->applied_coupons ) > 0;
	}

	/**
	 * Applies a coupon code passed to the method.
	 *
	 * @param string $coupon_code - The code to apply
	 * @return bool	True if the coupon is applied, false if it does not exist or cannot be applied
	 */
	public function add_discount( $coupon_code ) {
		// Coupons are globally disabled.
		if ( ! wc_coupons_enabled() ) {
			return false;
		}

		// Sanitize coupon code.
		$coupon_code = wc_format_coupon_code( $coupon_code );

		// Get the coupon.
		$the_coupon = new WC_Coupon( $coupon_code );

		// Check it can be used with cart.
		if ( ! $the_coupon->is_valid() ) {
			wc_add_notice( $the_coupon->get_error_message(), 'error' );
			return false;
		}

		// Check if applied.
		if ( $this->has_discount( $coupon_code ) ) {
			$the_coupon->add_coupon_message( WC_Coupon::E_WC_COUPON_ALREADY_APPLIED );
			return false;
		}

		// If its individual use then remove other coupons.
		if ( $the_coupon->get_individual_use() ) {
			$coupons_to_keep = apply_filters( 'woocommerce_apply_individual_use_coupon', array(), $the_coupon, $this->applied_coupons );

			foreach ( $this->applied_coupons as $applied_coupon ) {
				$keep_key = array_search( $applied_coupon, $coupons_to_keep );
				if ( false === $keep_key ) {
					$this->remove_coupon( $applied_coupon );
				} else {
					unset( $coupons_to_keep[ $keep_key ] );
				}
			}

			if ( ! empty( $coupons_to_keep ) ) {
				$this->applied_coupons += $coupons_to_keep;
			}
		}

		// Check to see if an individual use coupon is set.
		if ( $this->applied_coupons ) {
			foreach ( $this->applied_coupons as $code ) {
				$coupon = new WC_Coupon( $code );

				if ( $coupon->get_individual_use() && false === apply_filters( 'woocommerce_apply_with_individual_use_coupon', false, $the_coupon, $coupon, $this->applied_coupons ) ) {

					// Reject new coupon.
					$coupon->add_coupon_message( WC_Coupon::E_WC_COUPON_ALREADY_APPLIED_INDIV_USE_ONLY );

					return false;
				}
			}
		}

		$this->applied_coupons[] = $coupon_code;

		// Choose free shipping.
		if ( $the_coupon->get_free_shipping() ) {
			$packages = WC()->shipping->get_packages();
			$chosen_shipping_methods = WC()->session->get( 'chosen_shipping_methods' );

			foreach ( $packages as $i => $package ) {
				$chosen_shipping_methods[ $i ] = 'free_shipping';
			}

			WC()->session->set( 'chosen_shipping_methods', $chosen_shipping_methods );
		}

		$the_coupon->add_coupon_message( WC_Coupon::WC_COUPON_SUCCESS );

		do_action( 'woocommerce_applied_coupon', $coupon_code );

		return true;
	}

	/**
	 * Get array of applied coupon objects and codes.
	 *
	 * @param null $deprecated
	 *
	 * @return array of applied coupons
	 */
	public function get_coupons( $deprecated = null ) {
		$coupons = array();

		if ( 'order' === $deprecated ) {
			return $coupons;
		}

		foreach ( $this->get_applied_coupons() as $code ) {
			$coupon = new WC_Coupon( $code );
			$coupons[ $code ] = $coupon;
		}

		return $coupons;
	}

	/**
	 * Gets the array of applied coupon codes.
	 *
	 * @return array of applied coupons
	 */
	public function get_applied_coupons() {
		return $this->applied_coupons;
	}

	/**
	 * Get the discount amount for a used coupon.
	 * @param  string $code coupon code
	 * @param  bool $ex_tax inc or ex tax
	 * @return float discount amount
	 */
	public function get_coupon_discount_amount( $code, $ex_tax = true ) {
		$discount_amount = isset( $this->coupon_discount_amounts[ $code ] ) ? $this->coupon_discount_amounts[ $code ] : 0;

		if ( ! $ex_tax ) {
			$discount_amount += $this->get_coupon_discount_tax_amount( $code );
		}

		return wc_cart_round_discount( $discount_amount, $this->dp );
	}

	/**
	 * Get the discount tax amount for a used coupon (for tax inclusive prices).
	 * @param  string $code coupon code
	 * @param  bool inc or ex tax
	 * @return float discount amount
	 */
	public function get_coupon_discount_tax_amount( $code ) {
		return wc_cart_round_discount( isset( $this->coupon_discount_tax_amounts[ $code ] ) ? $this->coupon_discount_tax_amounts[ $code ] : 0, $this->dp );
	}

	/**
	 * Remove coupons from the cart of a defined type. Type 1 is before tax, type 2 is after tax.
	 *
	 * @param null $deprecated
	 */
	public function remove_coupons( $deprecated = null ) {
		$this->applied_coupons = $this->coupon_discount_amounts = $this->coupon_discount_tax_amounts = $this->coupon_applied_count = array();
		WC()->session->set( 'applied_coupons', array() );
		WC()->session->set( 'coupon_discount_amounts', array() );
		WC()->session->set( 'coupon_discount_tax_amounts', array() );
	}

	/**
	 * Remove a single coupon by code.
	 * @param  string $coupon_code Code of the coupon to remove
	 * @return bool
	 */
	public function remove_coupon( $coupon_code ) {
		// Coupons are globally disabled
		if ( ! wc_coupons_enabled() ) {
			return false;
		}

		// Get the coupon
		$coupon_code  = wc_format_coupon_code( $coupon_code );
		$position     = array_search( $coupon_code, $this->applied_coupons );

		if ( false !== $position ) {
			unset( $this->applied_coupons[ $position ] );
		}

		WC()->session->set( 'applied_coupons', $this->applied_coupons );

		do_action( 'woocommerce_removed_coupon', $coupon_code );

		return true;
	}

	/**
	 * Function to apply discounts to a product and get the discounted price (before tax is applied).
	 *
	 * @param mixed $values
	 * @param mixed $price
	 * @param bool $add_totals (default: false)
	 * @return float price
	 */
	public function get_discounted_price( $values, $price, $add_totals = false ) {
		if ( ! $price ) {
			return $price;
		}

		$undiscounted_price = $price;

		if ( ! empty( $this->coupons ) ) {
			$product = $values['data'];

			foreach ( $this->coupons as $code => $coupon ) {
				if ( $coupon->is_valid() && ( $coupon->is_valid_for_product( $product, $values ) || $coupon->is_valid_for_cart() ) ) {
					$discount_amount = $coupon->get_discount_amount( 'yes' === get_option( 'woocommerce_calc_discounts_sequentially', 'no' ) ? $price : $undiscounted_price, $values, true );
					$discount_amount = min( $price, $discount_amount );
					$price           = max( $price - $discount_amount, 0 );

					// Store the totals for DISPLAY in the cart.
					if ( $add_totals ) {
						$total_discount     = $discount_amount * $values['quantity'];
						$total_discount_tax = 0;

						if ( wc_tax_enabled() && $product->is_taxable() ) {
							$tax_rates          = WC_Tax::get_rates( $product->get_tax_class() );
							$taxes              = WC_Tax::calc_tax( $discount_amount, $tax_rates, $this->prices_include_tax );
							$total_discount_tax = WC_Tax::get_tax_total( $taxes ) * $values['quantity'];
							$total_discount     = $this->prices_include_tax ? $total_discount - $total_discount_tax : $total_discount;
							$this->discount_cart_tax += $total_discount_tax;
						}

						$this->discount_cart     += $total_discount;
						$this->increase_coupon_discount_amount( $code, $total_discount, $total_discount_tax );
						$this->increase_coupon_applied_count( $code, $values['quantity'] );
					}
				}

				// If the price is 0, we can stop going through coupons because there is nothing more to discount for this product.
				if ( 0 >= $price ) {
					break;
				}
			}
		}

		return apply_filters( 'woocommerce_get_discounted_price', $price, $values, $this );
	}

	/**
	 * Store how much discount each coupon grants.
	 *
	 * @access private
	 * @param string $code
	 * @param double $amount
	 * @param double $tax
	 */
	private function increase_coupon_discount_amount( $code, $amount, $tax ) {
		$this->coupon_discount_amounts[ $code ]     = isset( $this->coupon_discount_amounts[ $code ] ) ? $this->coupon_discount_amounts[ $code ] + $amount : $amount;
		$this->coupon_discount_tax_amounts[ $code ] = isset( $this->coupon_discount_tax_amounts[ $code ] ) ? $this->coupon_discount_tax_amounts[ $code ] + $tax : $tax;
	}

	/**
	 * Store how many times each coupon is applied to cart/items.
	 *
	 * @access private
	 * @param string $code
	 * @param int    $count
	 */
	private function increase_coupon_applied_count( $code, $count = 1 ) {
		if ( empty( $this->coupon_applied_count[ $code ] ) ) {
			$this->coupon_applied_count[ $code ] = 0;
		}
		$this->coupon_applied_count[ $code ] += $count;
	}

	/*
	 * Fees API to add additional costs to orders.
	 */

	/**
	 * Add additional fee to the cart.
	 *
	 * Fee is an amount of money charged for a particular piece of work
	 * or for a particular right or service, and not supposed to be negative.
	 *
	 * @param string $name      Unique name for the fee. Multiple fees of the same name cannot be added.
	 * @param float  $amount    Fee amount (do not enter negative amounts).
	 * @param bool   $taxable   Is the fee taxable? (default: false).
	 * @param string $tax_class The tax class for the fee if taxable. A blank string is standard tax class. (default: '').
	 */
	public function add_fee( $name, $amount, $taxable = false, $tax_class = '' ) {

		$new_fee_id = sanitize_title( $name );

		// Only add each fee once.
		foreach ( $this->fees as $fee ) {
			if ( $fee->id == $new_fee_id ) {
				return;
			}
		}

		$new_fee            = new stdClass();
		$new_fee->id        = $new_fee_id;
		$new_fee->name      = esc_attr( $name );
		$new_fee->amount    = (float) esc_attr( $amount );
		$new_fee->tax_class = $tax_class;
		$new_fee->taxable   = $taxable ? true : false;
		$new_fee->tax       = 0;
		$new_fee->tax_data  = array();
		$this->fees[]       = $new_fee;
	}

	/**
	 * Get fees.
	 *
	 * @return array
	 */
	public function get_fees() {
		return array_filter( (array) $this->fees );
	}

	/**
	 * Calculate fees.
	 */
	public function calculate_fees() {
		// Reset fees before calculation
		$this->fee_total = 0;
		$this->fees      = array();

		// Fire an action where developers can add their fees
		do_action( 'woocommerce_cart_calculate_fees', $this );

		// If fees were added, total them and calculate tax
		if ( ! empty( $this->fees ) ) {
			foreach ( $this->fees as $fee_key => $fee ) {
				$this->fee_total += $fee->amount;

				if ( $fee->taxable ) {
					// Get tax rates
					$tax_rates = WC_Tax::get_rates( $fee->tax_class );
					$fee_taxes = WC_Tax::calc_tax( $fee->amount, $tax_rates, false );

					if ( ! empty( $fee_taxes ) ) {
						// Set the tax total for this fee
						$this->fees[ $fee_key ]->tax = array_sum( $fee_taxes );

						// Set tax data - Since 2.2
						$this->fees[ $fee_key ]->tax_data = $fee_taxes;

						// Tax rows - merge the totals we just got
						foreach ( array_keys( $this->taxes + $fee_taxes ) as $key ) {
							$this->taxes[ $key ] = ( isset( $fee_taxes[ $key ] ) ? $fee_taxes[ $key ] : 0 ) + ( isset( $this->taxes[ $key ] ) ? $this->taxes[ $key ] : 0 );
						}
					}
				}
			}
		}
	}

	/*
	 * Get Formatted Totals.
	 */

	/**
	 * Gets the order total (after calculation).
	 *
	 * @return string formatted price
	 */
	public function get_total() {
		return apply_filters( 'woocommerce_cart_total', wc_price( $this->total ) );
	}

	/**
	 * Gets the total excluding taxes.
	 *
	 * @return string formatted price
	 */
	public function get_total_ex_tax() {
		$total = $this->total - $this->tax_total - $this->shipping_tax_total;
		if ( $total < 0 ) {
			$total = 0;
		}
		return apply_filters( 'woocommerce_cart_total_ex_tax', wc_price( $total ) );
	}

	/**
	 * Gets the cart contents total (after calculation).
	 *
	 * @todo deprecate? It's unused.
	 * @return string formatted price
	 */
	public function get_cart_total() {
		if ( ! $this->prices_include_tax ) {
			$cart_contents_total = wc_price( $this->cart_contents_total );
		} else {
			$cart_contents_total = wc_price( $this->cart_contents_total + $this->tax_total );
		}

		return apply_filters( 'woocommerce_cart_contents_total', $cart_contents_total );
	}

	/**
	 * Gets the sub total (after calculation).
	 *
	 * @param bool $compound whether to include compound taxes
	 * @return string formatted price
	 */
	public function get_cart_subtotal( $compound = false ) {

		// If the cart has compound tax, we want to show the subtotal as
		// cart + shipping + non-compound taxes (after discount)
		if ( $compound ) {

			$cart_subtotal = wc_price( $this->cart_contents_total + $this->shipping_total + $this->get_taxes_total( false, false ) );

		// Otherwise we show cart items totals only (before discount)
		} else {

			// Display varies depending on settings
			if ( 'excl' === $this->tax_display_cart ) {

				$cart_subtotal = wc_price( $this->subtotal_ex_tax );

				if ( $this->tax_total > 0 && $this->prices_include_tax ) {
					$cart_subtotal .= ' <small class="tax_label">' . WC()->countries->ex_tax_or_vat() . '</small>';
				}
			} else {

				$cart_subtotal = wc_price( $this->subtotal );

				if ( $this->tax_total > 0 && ! $this->prices_include_tax ) {
					$cart_subtotal .= ' <small class="tax_label">' . WC()->countries->inc_tax_or_vat() . '</small>';
				}
			}
		}

		return apply_filters( 'woocommerce_cart_subtotal', $cart_subtotal, $compound, $this );
	}

	/**
	 * Get the product row price per item.
	 *
	 * @param WC_Product $product
	 * @return string formatted price
	 */
	public function get_product_price( $product ) {
		if ( 'excl' === $this->tax_display_cart ) {
			$product_price = wc_get_price_excluding_tax( $product );
		} else {
			$product_price = wc_get_price_including_tax( $product );
		}
		return apply_filters( 'woocommerce_cart_product_price', wc_price( $product_price ), $product );
	}

	/**
	 * Get the product row subtotal.
	 *
	 * Gets the tax etc to avoid rounding issues.
	 *
	 * When on the checkout (review order), this will get the subtotal based on the customer's tax rate rather than the base rate.
	 *
	 * @param WC_Product $product
	 * @param int $quantity
	 * @return string formatted price
	 */
	public function get_product_subtotal( $product, $quantity ) {
		$price   = $product->get_price();
		$taxable = $product->is_taxable();

		// Taxable
		if ( $taxable ) {

			if ( 'excl' === $this->tax_display_cart ) {

				$row_price        = wc_get_price_excluding_tax( $product, array( 'qty' => $quantity ) );
				$product_subtotal = wc_price( $row_price );

				if ( $this->prices_include_tax && $this->tax_total > 0 ) {
					$product_subtotal .= ' <small class="tax_label">' . WC()->countries->ex_tax_or_vat() . '</small>';
				}
			} else {

				$row_price        = wc_get_price_including_tax( $product, array( 'qty' => $quantity ) );
				$product_subtotal = wc_price( $row_price );

				if ( ! $this->prices_include_tax && $this->tax_total > 0 ) {
					$product_subtotal .= ' <small class="tax_label">' . WC()->countries->inc_tax_or_vat() . '</small>';
				}
			}

		// Non-taxable
		} else {

			$row_price        = $price * $quantity;
			$product_subtotal = wc_price( $row_price );

		}

		return apply_filters( 'woocommerce_cart_product_subtotal', $product_subtotal, $product, $quantity, $this );
	}

	/**
	 * Gets the cart tax (after calculation).
	 *
	 * @return string formatted price
	 */
	public function get_cart_tax() {
		$cart_total_tax = wc_round_tax_total( $this->tax_total + $this->shipping_tax_total );

		return apply_filters( 'woocommerce_get_cart_tax', $cart_total_tax ? wc_price( $cart_total_tax ) : '' );
	}

	/**
	 * Get a tax amount.
	 * @param  string $tax_rate_id
	 * @return float amount
	 */
	public function get_tax_amount( $tax_rate_id ) {
		return isset( $this->taxes[ $tax_rate_id ] ) ? $this->taxes[ $tax_rate_id ] : 0;
	}

	/**
	 * Get a tax amount.
	 * @param  string $tax_rate_id
	 * @return float amount
	 */
	public function get_shipping_tax_amount( $tax_rate_id ) {
		return isset( $this->shipping_taxes[ $tax_rate_id ] ) ? $this->shipping_taxes[ $tax_rate_id ] : 0;
	}

	/**
	 * Get tax row amounts with or without compound taxes includes.
	 *
	 * @param  bool $compound True if getting compound taxes
	 * @param  bool $display  True if getting total to display
	 * @return float price
	 */
	public function get_taxes_total( $compound = true, $display = true ) {
		$total = 0;
		foreach ( $this->taxes as $key => $tax ) {
			if ( ! $compound && WC_Tax::is_compound( $key ) ) {
				continue;
			}
			$total += $tax;
		}
		foreach ( $this->shipping_taxes as $key => $tax ) {
			if ( ! $compound && WC_Tax::is_compound( $key ) ) {
				continue;
			}
			$total += $tax;
		}
		if ( $display ) {
			$total = wc_round_tax_total( $total );
		}
		return apply_filters( 'woocommerce_cart_taxes_total', $total, $compound, $display, $this );
	}

	/**
	 * Get the total of all cart discounts.
	 *
	 * @return float
	 */
	public function get_cart_discount_total() {
		return wc_cart_round_discount( $this->discount_cart, $this->dp );
	}

	/**
	 * Get the total of all cart tax discounts (used for discounts on tax inclusive prices).
	 *
	 * @return float
	 */
	public function get_cart_discount_tax_total() {
		return wc_cart_round_discount( $this->discount_cart_tax, $this->dp );
	}

	/**
	 * Gets the total discount amount - both kinds.
	 *
	 * @return mixed formatted price or false if there are none
	 */
	public function get_total_discount() {
		if ( $this->get_cart_discount_total() ) {
			$total_discount = wc_price( $this->get_cart_discount_total() );
		} else {
			$total_discount = false;
		}
		return apply_filters( 'woocommerce_cart_total_discount', $total_discount, $this );
	}

	/**
	 * Gets the total (product) discount amount - these are applied before tax.
	 *
	 * @deprecated Order discounts (after tax) removed in 2.3 so multiple methods for discounts are no longer required.
	 * @return mixed formatted price or false if there are none
	 */
	public function get_discounts_before_tax() {
		wc_deprecated_function( 'get_discounts_before_tax', '2.3', 'get_total_discount' );
		if ( $this->get_cart_discount_total() ) {
			$discounts_before_tax = wc_price( $this->get_cart_discount_total() );
		} else {
			$discounts_before_tax = false;
		}
		return apply_filters( 'woocommerce_cart_discounts_before_tax', $discounts_before_tax, $this );
	}

	/**
	 * Get the total of all order discounts (after tax discounts).
	 *
	 * @deprecated Order discounts (after tax) removed in 2.3
	 * @return int
	 */
	public function get_order_discount_total() {
		wc_deprecated_function( 'get_order_discount_total', '2.3' );
		return 0;
	}

	/**
	 * Function to apply cart discounts after tax.
	 * @deprecated Coupons can not be applied after tax
	 *
	 * @param $values
	 * @param $price
	 */
	public function apply_cart_discounts_after_tax( $values, $price ) {
		wc_deprecated_function( 'apply_cart_discounts_after_tax', '2.3' );
	}

	/**
	 * Function to apply product discounts after tax.
	 * @deprecated Coupons can not be applied after tax
	 *
	 * @param $values
	 * @param $price
	 */
	public function apply_product_discounts_after_tax( $values, $price ) {
		wc_deprecated_function( 'apply_product_discounts_after_tax', '2.3' );
	}

	/**
	 * Gets the order discount amount - these are applied after tax.
	 * @deprecated Coupons can not be applied after tax
	 */
	public function get_discounts_after_tax() {
		wc_deprecated_function( 'get_discounts_after_tax', '2.3' );
	}
}