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| 1 | +<?php |
| 2 | + |
| 3 | +/** |
| 4 | + * @param $length |
| 5 | + * |
| 6 | + * @return string |
| 7 | + */ |
| 8 | +function buildSpaceString($length) |
| 9 | +{ |
| 10 | + $string = ''; |
| 11 | + for ($i = 0; $i < $length; $i++) { |
| 12 | + $string .= ''; |
| 13 | + } |
| 14 | + return $string; |
| 15 | +} |
| 16 | + |
| 17 | +/** |
| 18 | + * Echo array of strings in output |
| 19 | + * |
| 20 | + * @param array $elements |
| 21 | + * @param int $tabLength |
| 22 | + */ |
| 23 | +function echoArrayAsString(array $elements, $tabLength) |
| 24 | +{ |
| 25 | + $tab = buildSpaceString($tabLength + 1); |
| 26 | + |
| 27 | + $elementsAsString = implode('', $elements); |
| 28 | + $commaSeparatedStrings = explode(',', $elementsAsString); |
| 29 | + |
| 30 | + $length = count($commaSeparatedStrings); |
| 31 | + |
| 32 | + if ($length === 1) { |
| 33 | + echo '' . $commaSeparatedStrings[0] . PHP_EOL; |
| 34 | + return; |
| 35 | + } |
| 36 | + |
| 37 | + for ($i = 0; $i < $length; $i++) { |
| 38 | + |
| 39 | + if ($i === 0) { |
| 40 | + echo '' . $commaSeparatedStrings[$i] . ',' . PHP_EOL; |
| 41 | + } else if ($i === ($length - 1)) { |
| 42 | + echo $tab . $commaSeparatedStrings[$i] . PHP_EOL; |
| 43 | + } else { |
| 44 | + echo $tab . $commaSeparatedStrings[$i] . ',' . PHP_EOL; |
| 45 | + } |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +/** |
| 50 | + * @param string $word |
| 51 | + * |
| 52 | + * @return bool |
| 53 | + */ |
| 54 | +function isSpecificSingleKeyWord($word) |
| 55 | +{ |
| 56 | + $keyWords = array( |
| 57 | + 'SELECT', |
| 58 | + 'FROM', |
| 59 | + 'JOIN', |
| 60 | + 'WHERE', |
| 61 | + 'AND', |
| 62 | + 'OR', |
| 63 | + 'HAVING', |
| 64 | + 'LIKE', |
| 65 | + ); |
| 66 | + |
| 67 | + if (in_array($word, $keyWords)) { |
| 68 | + return true; |
| 69 | + } else { |
| 70 | + return false; |
| 71 | + } |
| 72 | +} |
| 73 | + |
| 74 | +/** |
| 75 | + * @param string $word |
| 76 | + * |
| 77 | + * @return bool |
| 78 | + */ |
| 79 | +function isSpecificDoubleKeyWord($word) |
| 80 | +{ |
| 81 | + $keyWords = array( |
| 82 | + 'INNER JOIN', |
| 83 | + 'LEFT JOIN', |
| 84 | + 'RIGHT JOIN', |
| 85 | + 'ORDER BY', |
| 86 | + 'GROUP BY', |
| 87 | + ); |
| 88 | + |
| 89 | + if (in_array($word, $keyWords)) { |
| 90 | + return true; |
| 91 | + } else { |
| 92 | + return false; |
| 93 | + } |
| 94 | +} |
| 95 | + |
| 96 | +/** |
| 97 | + * @param array $words |
| 98 | + * |
| 99 | + * @return array |
| 100 | + */ |
| 101 | +function sortWords(array $words) |
| 102 | +{ |
| 103 | + $parts = array(); |
| 104 | + |
| 105 | + $keyWord = 'SELECT'; |
| 106 | + $part = array(); |
| 107 | + |
| 108 | + $length = count($words); |
| 109 | + |
| 110 | + for ($i = 0; $i < $length; $i++) { |
| 111 | + |
| 112 | + $currentWord = $words[$i]; |
| 113 | + $nextWord = $words[$i + 1]; |
| 114 | + $doubleWord = $currentWord . '' . $nextWord; |
| 115 | + |
| 116 | + if (isSpecificSingleKeyWord($currentWord)) { |
| 117 | + |
| 118 | + $parts[$keyWord] = $part; |
| 119 | + $keyWord = $currentWord; |
| 120 | + $part = array(); |
| 121 | + } else if (isSpecificDoubleKeyWord($doubleWord)) { |
| 122 | + $parts[$keyWord] = $part; |
| 123 | + $keyWord = $doubleWord; |
| 124 | + $part = array(); |
| 125 | + $i++; |
| 126 | + } else { |
| 127 | + $part[] = $currentWord; |
| 128 | + } |
| 129 | + } |
| 130 | + |
| 131 | + $parts[$keyWord] = $part; |
| 132 | + |
| 133 | + return $parts; |
| 134 | +} |
| 135 | + |
| 136 | +/** |
| 137 | + * Validate console input |
| 138 | + * |
| 139 | + * Die if input is not valid |
| 140 | + * |
| 141 | + * @param array $argv user inputs |
| 142 | + */ |
| 143 | +function validateInput($argv) |
| 144 | +{ |
| 145 | + $isValid = false; |
| 146 | + |
| 147 | + if (count($argv) === 2) { |
| 148 | + $isValid = true; |
| 149 | + } |
| 150 | + |
| 151 | + if (!$isValid) { |
| 152 | + echo 'php explore_sql_query <query>' . PHP_EOL; |
| 153 | + die(1); |
| 154 | + } |
| 155 | +} |
| 156 | + |
| 157 | +validateInput($argv); |
| 158 | + |
| 159 | +require 'Util/TextColorWriter.php'; |
| 160 | + |
| 161 | +$query = $argv[1]; |
| 162 | +$query = str_replace(array("\r\n", "\r", "\n"), "", $query); |
| 163 | + |
| 164 | +$words = explode('', $query); |
| 165 | +$queryParts = sortWords($words); |
| 166 | + |
| 167 | +echo TextColorWriter::textColor('QUERY ANALYSIS:', TextColorWriter::BASH_PROMPT_GREEN) . PHP_EOL; |
| 168 | + |
| 169 | +foreach ($queryParts as $key => $part) { |
| 170 | + $tabLength = strlen($key) + 1; |
| 171 | + |
| 172 | + if (in_array($key, array('AND','OR'))) { |
| 173 | + echo ''; |
| 174 | + } |
| 175 | + |
| 176 | + echo '' . TextColorWriter::textColor($key, TextColorWriter::BASH_PROMPT_YELLOW) . ''; |
| 177 | + echoArrayAsString($part, $tabLength); |
| 178 | +} |
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