lekoala /
tin
| Total Complexity | 48 |
| Total Lines | 176 |
| Duplicated Lines | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Complex classes like DEAlgorithm often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use DEAlgorithm, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 10 | class DEAlgorithm extends TINAlgorithm |
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| 11 | { |
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| 12 | const LENGTH_1 = 11; |
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| 13 | const PATTERN_1 = "[1-9]\\d{10}"; |
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| 14 | const LENGTH_2 = 11; |
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| 15 | const PATTERN_2 = "[1-9]\\d{10}"; |
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| 16 | |||
| 17 | public function validate(string $tin) |
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| 18 | { |
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| 19 | $normalizedTIN = str_replace("/", "", $tin); |
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| 20 | if (!$this->isFollowLength($normalizedTIN)) { |
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| 21 | return StatusCode::INVALID_LENGTH; |
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| 22 | } |
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| 23 | if ($this->isFollowLength($normalizedTIN) && !$this->isFollowPattern($normalizedTIN)) { |
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| 24 | return StatusCode::INVALID_PATTERN; |
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| 25 | } |
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| 26 | if (!$this->isFollowRules($normalizedTIN)) { |
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| 27 | return StatusCode::INVALID_SYNTAX; |
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| 28 | } |
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| 29 | return StatusCode::VALID; |
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| 30 | } |
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| 31 | |||
| 32 | public function isFollowLength(string $tin) |
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| 33 | { |
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| 34 | return $this->isFollowLength1($tin) || $this->isFollowLength2($tin); |
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| 35 | } |
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| 36 | |||
| 37 | public function isFollowLength1(string $tin) |
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| 38 | { |
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| 39 | return StringUtil::isFollowLength($tin, self::LENGTH_1); |
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| 40 | } |
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| 41 | |||
| 42 | public function isFollowLength2(string $tin) |
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| 43 | { |
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| 44 | return StringUtil::isFollowLength($tin, self::LENGTH_2); |
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| 45 | } |
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| 46 | |||
| 47 | public function isFollowPattern(string $tin) |
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| 48 | { |
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| 49 | return $this->isFollowPattern1($tin) || $this->isFollowPattern2($tin); |
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| 50 | } |
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| 51 | |||
| 52 | public function isFollowPattern1(string $tin) |
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| 53 | { |
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| 54 | if (!StringUtil::isFollowPattern($tin, self::PATTERN_1)) { |
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| 55 | return false; |
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| 56 | } |
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| 57 | $tab = []; |
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| 58 | $pos = []; |
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| 59 | for ($i = 0; $i < 10; $i++) { |
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| 60 | $tab[$i] = StringUtil::digitAt($tin, $i); |
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| 61 | $pos[$i] = 0; |
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| 62 | } |
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| 63 | for ($j = 0; $j < 10; $j++) { |
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| 64 | $pos[$tab[$j]]++; |
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| 65 | } |
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| 66 | $isEncounteredTwice2 = false; |
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| 67 | $isEncountered0 = false; |
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| 68 | for ($k = 0; $k < 10; $k++) { |
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| 69 | if ($pos[$k] == 2) { |
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| 70 | if ($isEncounteredTwice2) { |
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| 71 | return false; |
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| 72 | } |
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| 73 | $isEncounteredTwice2 = true; |
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| 74 | } |
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| 75 | if ($pos[$k] == 0) { |
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| 76 | if ($isEncountered0) { |
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| 77 | return false; |
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| 78 | } |
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| 79 | $isEncountered0 = true; |
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| 80 | } |
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| 81 | } |
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| 82 | return $isEncountered0; |
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| 83 | } |
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| 84 | |||
| 85 | public function isFollowPattern2(string $tin) |
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| 86 | { |
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| 87 | if (!StringUtil::isFollowPattern($tin, self::PATTERN_2)) { |
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| 88 | return false; |
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| 89 | } |
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| 90 | $tab = []; |
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| 91 | $pos = []; |
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| 92 | for ($i = 0; $i < 10; $i++) { |
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| 93 | $tab[$i] = StringUtil::digitAt($tin, $i); |
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| 94 | $pos[$i] = 0; |
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| 95 | } |
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| 96 | for ($i = 0; $i < 8; $i++) { |
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| 97 | if ($tab[$i] == $tab[$i + 1] && $tab[$i + 1] == $tab[$i + 2]) { |
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| 98 | return false; |
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| 99 | } |
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| 100 | } |
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| 101 | for ($j = 0; $j < 10; $j++) { |
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| 102 | $pos[$tab[$j]]++; |
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| 103 | } |
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| 104 | $isEncounteredTwice2 = false; |
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| 105 | $isEncounteredThrice3 = false; |
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| 106 | for ($k = 0; $k < 10; $k++) { |
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| 107 | if ($pos[$k] > 3) { |
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| 108 | return false; |
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| 109 | } |
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| 110 | if ($pos[$k] == 3) { |
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| 111 | if ($isEncounteredThrice3) { |
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| 112 | return false; |
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| 113 | } |
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| 114 | $isEncounteredThrice3 = true; |
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| 115 | } |
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| 116 | if ($pos[$k] == 2) { |
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| 117 | if ($isEncounteredTwice2) { |
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| 118 | return false; |
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| 119 | } |
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| 120 | $isEncounteredTwice2 = true; |
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| 121 | } |
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| 122 | } |
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| 123 | return $isEncounteredThrice3 || $isEncounteredTwice2; |
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| 124 | } |
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| 125 | |||
| 126 | public function isFollowRules(string $tin) |
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| 127 | { |
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| 128 | return (self::LENGTH_1 == strlen($tin) && $this->isFollowRuleGermany1($tin)) || $this->isFollowRuleGermany2($tin); |
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| 129 | } |
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| 130 | |||
| 131 | public function isFollowRuleGermany1(string $tin) |
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| 132 | { |
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| 133 | $c1 = StringUtil::digitAt($tin, 0); |
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| 134 | $c2 = []; |
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| 135 | for ($i = 0; $i < 9; $i++) { |
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| 136 | $c2[$i] = StringUtil::digitAt($tin, $i + 1); |
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| 137 | } |
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| 138 | $result = ($c1 + 10) % 10; |
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| 139 | if ($result == 0) { |
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| 140 | $result = 10; |
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| 141 | } |
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| 142 | $result *= 2; |
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| 143 | $x = $result % 11; |
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| 144 | for ($j = 0; $j < 9; $j++) { |
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| 145 | $x = ($x + $c2[$j]) % 10; |
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| 146 | if ($x == 0) { |
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| 147 | $x = 10; |
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| 148 | } |
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| 149 | $x *= 2; |
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| 150 | $x %= 11; |
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| 151 | } |
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| 152 | $c3 = StringUtil::digitAt($tin, 10); |
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| 153 | $total = 11 - $x; |
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| 154 | if ($total == 10) { |
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| 155 | return $c3 == 0; |
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| 156 | } |
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| 157 | return $total == $c3; |
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| 158 | } |
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| 159 | |||
| 160 | public function isFollowRuleGermany2(string $tin) |
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| 161 | { |
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| 162 | return StringUtil::digitAt($tin, 10) == $this->calculateCheckDigit($tin); |
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| 163 | } |
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| 164 | |||
| 165 | public function calculateCheckDigit(string $idnrString) |
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| 186 | } |
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| 187 | } |
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| 188 |
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