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<?php

namespace Mpdf\Barcode;

/**
 * CODE 93 - USS-93
 * Compact code similar to Code 39
 */
class Code93 extends \Mpdf\Barcode\AbstractBarcode implements \Mpdf\Barcode\BarcodeInterface
{

/**
	 * @param string $code
	 */
	public function __construct($code)
	{
		$this->init($code);

$this->data['nom-X'] = 0.381; // Nominal value for X-dim (bar width) in mm (2 X min. spec.)
		$this->data['nom-H'] = 10;  // Nominal value for Height of Full bar in mm (non-spec.)
		$this->data['lightmL'] = 10; // LEFT light margin =  x X-dim (spec.)
		$this->data['lightmR'] = 10; // RIGHT light margin =  x X-dim (spec.)
		$this->data['lightTB'] = 0; // TOP/BOTTOM light margin =  x X-dim (non-spec.)
	}

/**
	 * @param string $code
	 */
	private function init($code)
	{
		$chr = [
			48 => '131112', // 0
			49 => '111213', // 1
			50 => '111312', // 2
			51 => '111411', // 3
			52 => '121113', // 4
			53 => '121212', // 5
			54 => '121311', // 6
			55 => '111114', // 7
			56 => '131211', // 8
			57 => '141111', // 9
			65 => '211113', // A
			66 => '211212', // B
			67 => '211311', // C
			68 => '221112', // D
			69 => '221211', // E
			70 => '231111', // F
			71 => '112113', // G
			72 => '112212', // H
			73 => '112311', // I
			74 => '122112', // J
			75 => '132111', // K
			76 => '111123', // L
			77 => '111222', // M
			78 => '111321', // N
			79 => '121122', // O
			80 => '131121', // P
			81 => '212112', // Q
			82 => '212211', // R
			83 => '211122', // S
			84 => '211221', // T
			85 => '221121', // U
			86 => '222111', // V
			87 => '112122', // W
			88 => '112221', // X
			89 => '122121', // Y
			90 => '123111', // Z
			45 => '121131', // -
			46 => '311112', // .
			32 => '311211', //
			36 => '321111', // $
			47 => '112131', // /
			43 => '113121', // +
			37 => '211131', // %
			128 => '121221', // ($)
			129 => '311121', // (/)
			130 => '122211', // (+)
			131 => '312111', // (%)
			42 => '111141', // start-stop
		];

$code = strtoupper($code);
		$encode = [
			chr(0) => chr(131) . 'U', chr(1) => chr(128) . 'A', chr(2) => chr(128) . 'B', chr(3) => chr(128) . 'C',
			chr(4) => chr(128) . 'D', chr(5) => chr(128) . 'E', chr(6) => chr(128) . 'F', chr(7) => chr(128) . 'G',
			chr(8) => chr(128) . 'H', chr(9) => chr(128) . 'I', chr(10) => chr(128) . 'J', chr(11) => '£K',
			chr(12) => chr(128) . 'L', chr(13) => chr(128) . 'M', chr(14) => chr(128) . 'N', chr(15) => chr(128) . 'O',
			chr(16) => chr(128) . 'P', chr(17) => chr(128) . 'Q', chr(18) => chr(128) . 'R', chr(19) => chr(128) . 'S',
			chr(20) => chr(128) . 'T', chr(21) => chr(128) . 'U', chr(22) => chr(128) . 'V', chr(23) => chr(128) . 'W',
			chr(24) => chr(128) . 'X', chr(25) => chr(128) . 'Y', chr(26) => chr(128) . 'Z', chr(27) => chr(131) . 'A',
			chr(28) => chr(131) . 'B', chr(29) => chr(131) . 'C', chr(30) => chr(131) . 'D', chr(31) => chr(131) . 'E',
			chr(32) => ' ', chr(33) => chr(129) . 'A', chr(34) => chr(129) . 'B', chr(35) => chr(129) . 'C',
			chr(36) => chr(129) . 'D', chr(37) => chr(129) . 'E', chr(38) => chr(129) . 'F', chr(39) => chr(129) . 'G',
			chr(40) => chr(129) . 'H', chr(41) => chr(129) . 'I', chr(42) => chr(129) . 'J', chr(43) => chr(129) . 'K',
			chr(44) => chr(129) . 'L', chr(45) => '-', chr(46) => '.', chr(47) => chr(129) . 'O',
			chr(48) => '0', chr(49) => '1', chr(50) => '2', chr(51) => '3',
			chr(52) => '4', chr(53) => '5', chr(54) => '6', chr(55) => '7',
			chr(56) => '8', chr(57) => '9', chr(58) => chr(129) . 'Z', chr(59) => chr(131) . 'F',
			chr(60) => chr(131) . 'G', chr(61) => chr(131) . 'H', chr(62) => chr(131) . 'I', chr(63) => chr(131) . 'J',
			chr(64) => chr(131) . 'V', chr(65) => 'A', chr(66) => 'B', chr(67) => 'C',
			chr(68) => 'D', chr(69) => 'E', chr(70) => 'F', chr(71) => 'G',
			chr(72) => 'H', chr(73) => 'I', chr(74) => 'J', chr(75) => 'K',
			chr(76) => 'L', chr(77) => 'M', chr(78) => 'N', chr(79) => 'O',
			chr(80) => 'P', chr(81) => 'Q', chr(82) => 'R', chr(83) => 'S',
			chr(84) => 'T', chr(85) => 'U', chr(86) => 'V', chr(87) => 'W',
			chr(88) => 'X', chr(89) => 'Y', chr(90) => 'Z', chr(91) => chr(131) . 'K',
			chr(92) => chr(131) . 'L', chr(93) => chr(131) . 'M', chr(94) => chr(131) . 'N', chr(95) => chr(131) . 'O',
			chr(96) => chr(131) . 'W', chr(97) => chr(130) . 'A', chr(98) => chr(130) . 'B', chr(99) => chr(130) . 'C',
			chr(100) => chr(130) . 'D', chr(101) => chr(130) . 'E', chr(102) => chr(130) . 'F', chr(103) => chr(130) . 'G',
			chr(104) => chr(130) . 'H', chr(105) => chr(130) . 'I', chr(106) => chr(130) . 'J', chr(107) => chr(130) . 'K',
			chr(108) => chr(130) . 'L', chr(109) => chr(130) . 'M', chr(110) => chr(130) . 'N', chr(111) => chr(130) . 'O',
			chr(112) => chr(130) . 'P', chr(113) => chr(130) . 'Q', chr(114) => chr(130) . 'R', chr(115) => chr(130) . 'S',
			chr(116) => chr(130) . 'T', chr(117) => chr(130) . 'U', chr(118) => chr(130) . 'V', chr(119) => chr(130) . 'W',
			chr(120) => chr(130) . 'X', chr(121) => chr(130) . 'Y', chr(122) => chr(130) . 'Z', chr(123) => chr(131) . 'P',
			chr(124) => chr(131) . 'Q', chr(125) => chr(131) . 'R', chr(126) => chr(131) . 'S', chr(127) => chr(131) . 'T'
		];

$code_ext = '';
		$clen = strlen($code);

for ($i = 0; $i < $clen; ++$i) {
			if (ord($code[$i]) > 127) {
				throw new \Mpdf\Barcode\BarcodeException(sprintf('Invalid character "%s" in Code93 barcode value', $code[$i]));
			}
			$code_ext .= $encode[$code[$i]];
		}

// checksum
		$code_ext .= $this->checksum($code_ext);

// add start and stop codes
		$code = '*' . $code_ext . '*';
		$bararray = ['code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => []];
		$k = 0;
		$clen = strlen($code);

for ($i = 0; $i < $clen; ++$i) {
			$char = ord($code[$i]);
			if (!isset($chr[$char])) {
				// invalid character
				throw new \Mpdf\Barcode\BarcodeException('Invalid CODE93 barcode value');
			}
			for ($j = 0; $j < 6; ++$j) {
				if (($j % 2) == 0) {
					$t = true; // bar
				} else {
					$t = false; // space
				}
				$w = $chr[$char][$j];
				$bararray['bcode'][$k] = ['t' => $t, 'w' => $w, 'h' => 1, 'p' => 0];
				$bararray['maxw'] += $w;
				++$k;
			}
		}

$bararray['bcode'][$k] = ['t' => true, 'w' => 1, 'h' => 1, 'p' => 0];
		$bararray['maxw'] += 1;

$this->data = $bararray;
	}

/**
	 * Calculate CODE 93 checksum (modulo 47).
	 *
	 * @param string $code
	 * @return string
	 */
	protected function checksum($code)
	{
		$chars = [
			'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
			'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',
			'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
			'W', 'X', 'Y', 'Z', '-', '.', ' ', '$', '/', '+', '%',
			'<', '=', '>', '?'
		];

// translate special characters
		$code = strtr($code, chr(128) . chr(131) . chr(129) . chr(130), '<=>?');
		$len = strlen($code);

// calculate check digit C
		$p = 1;
		$check = 0;
		for ($i = ($len - 1); $i >= 0; --$i) {
			$k = array_keys($chars, $code[$i]);
			$check += ($k[0] * $p);
			++$p;
			if ($p > 20) {
				$p = 1;
			}
		}
		$check %= 47;
		$c = $chars[$check];
		$code .= $c;

// calculate check digit K
		$p = 1;
		$check = 0;
		for ($i = $len; $i >= 0; --$i) {
			$k = array_keys($chars, $code[$i]);
			$check += ($k[0] * $p);
			++$p;
			if ($p > 15) {
				$p = 1;
			}
		}
		$check %= 47;
		$k = $chars[$check];
		$checksum = $c . $k;

// resto respecial characters
		$checksum = strtr($checksum, '<=>?', chr(128) . chr(131) . chr(129) . chr(130));

return $checksum;
	}

/**
	 * @inheritdoc
	 */
	public function getType()
	{
		return 'CODE93';
	}

}