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<?php |
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/** |
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Copyright (C) 2018-2020 KANOUN Salim |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the Affero GNU General Public v.3 License as published by |
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the Free Software Foundation; |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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Affero GNU General Public Public for more details. |
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You should have received a copy of the Affero GNU General Public Public along |
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with this program; if not, write to the Free Software Foundation, Inc., |
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* Performs DB Structure Alteration for the specific forms |
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*/ |
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class Visit_Builder |
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{ |
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/** |
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* Get specific PDO object in order to perform db table alteration |
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* on the visit type tables |
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* @return PDO |
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*/ |
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private static function getLinkpdo(): PDO |
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{ |
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return Session::getLinkpdo(); |
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} |
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/** |
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* Check if the specific db table of a given visit type is empty |
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* @param Visit_Type $vt |
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* @return boolean |
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*/ |
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public static function isTableEmpty(Visit_Type $vt): bool |
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{ |
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$linkpdo=Visit_Builder::getLinkpdo(); |
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$table=$vt->tableReviewSpecificName; |
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$pdoSt=$linkpdo->query('SELECT * FROM '.$table.';'); |
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return count($pdoSt->fetchAll()) == 0; |
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} |
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public static function dropColumn(Visit_Type $vt, string $column) : PDOStatement |
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{ |
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$linkpdo=Visit_Builder::getLinkpdo(); |
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$table=$vt->tableReviewSpecificName; |
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$sql='ALTER TABLE `'.$table.'` DROP COLUMN `'.$column.'`;'; |
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return $linkpdo->query($sql); |
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} |
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public static function alterColumn(Visit_Type $vt, $columnNameBefore, $columnNameAfter, $dataType) : PDOStatement |
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{ |
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$linkpdo=Visit_Builder::getLinkpdo(); |
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$table=$vt->tableReviewSpecificName; |
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$sql='ALTER TABLE `'.$table.'` CHANGE `'.$columnNameBefore.'` `'.$columnNameAfter.'` '.$dataType.';'; |
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return $linkpdo->query($sql); |
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} |
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public static function addColumn(Visit_Type $vt, $columnName, $dataType) : PDOStatement |
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{ |
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$linkpdo=Visit_Builder::getLinkpdo(); |
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$table=$vt->tableReviewSpecificName; |
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$sql='ALTER TABLE `'.$table.'` ADD `'.$columnName.'` '.$dataType.';'; |
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return $linkpdo->query($sql); |
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} |
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/** |
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* Format mysql data type string for mysql query |
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* @param string $type mysql data type without parameters (e.g. 'decimal') |
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* @param array|null $typeParam list of the data type paramaters |
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* @return string mysql column datatype |
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*/ |
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public static function formatDataType(string $typeLabel, $typeParams): string |
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{ |
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$res=''; |
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switch ($typeLabel) { |
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case 'int': |
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$res='INT(11)'; |
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break; |
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case 'tinyint': |
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$res='TINYINT(1)'; |
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break; |
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case 'tinytext': |
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$res='TINYTEXT'; |
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break; |
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case 'date': |
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$res='DATE'; |
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break; |
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case 'varchar': |
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$param=Visit_Builder::escape($typeParams[0]); |
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// Format params array into string e.g. '(123)' |
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$res='VARCHAR('.$param.')'; |
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break; |
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case 'decimal': |
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$param1=Visit_Builder::escape($typeParams[0]); |
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$param2=Visit_Builder::escape($typeParams[1]); |
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// Format params array into string e.g. '(12,3)' |
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$res='DECIMAL('.$param1.','.$param2.')'; |
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break; |
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case 'enum': |
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$params=[]; |
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foreach ($typeParams as $tp) { |
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array_push($params, Visit_Builder::escape($tp)); |
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} |
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// Format params array into string e.g. '("abc","def","ghi")' |
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$res='ENUM("'.implode('","', $params).'")'; |
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break; |
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default: |
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throw new Exception('Unknown datatype'); |
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} |
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return $res; |
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} |
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/** |
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* Get the mysql data type label of a string containing a mysql data |
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* type label (e.g. 'decimal') and data type parameter (e.g. '(10,2)') |
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* @param string $type |
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* @return string data typpe label |
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*/ |
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public static function extractDataTypeLabel(string $datatype): string |
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{ |
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return substr($datatype, 0, strpos($datatype, '(')); |
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} |
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/** |
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* Get mysql column data type of a given column from a given visit type |
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* @param Visit_Type $vt |
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* @param string $columnName |
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* @return string mysql data type with parameters |
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*/ |
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public static function getColumnDataType(Visit_Type $vt, string $columnName): string |
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{ |
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$columns=$vt->getSpecificTableInputType(); |
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foreach ($columns as $c) { |
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// Retrieving original data type |
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if ($c['COLUMN_NAME'] == $columnName) { |
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return $c['COLUMN_TYPE']; |
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} |
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} |
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throw new Exception('Cannot find column '.$columnName.' for visit type '.$vt); |
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} |
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/** |
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* Escape special chars from a given string |
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* @param string $s string to escape chars from |
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* @return string escaped string |
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*/ |
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public static function escape(string $s): string |
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{ |
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return preg_replace('/[^A-Za-z0-9\-_]/', '', $s); |
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} |
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} |
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salimkanoun /
GaelO
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