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<?php |
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/** |
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* Parses conditions for where and having clauses |
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* |
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* PHP Version 5 |
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* |
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* @category Core |
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* @package SQL |
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* @author Hans-Joachim Piepereit <[email protected]> |
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* @copyright 2013 cSphere Team |
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* @license http://opensource.org/licenses/bsd-license Simplified BSD License |
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* @link http://www.csphere.eu |
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**/ |
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namespace csphere\core\sql; |
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/** |
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* Parses conditions for where and having clauses |
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* |
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* @category Core |
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* @package SQL |
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* @author Hans-Joachim Piepereit <[email protected]> |
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* @copyright 2013 cSphere Team |
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* @license http://opensource.org/licenses/bsd-license Simplified BSD License |
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* @link http://www.csphere.eu |
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**/ |
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abstract class Conditions |
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{ |
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/** |
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* Supported operators for conditions |
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**/ |
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private static $_operators = ['=', '!=', '>', '<', '<>', '>=', '<=']; |
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/** |
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* Generate conditional parts of queries |
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* |
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* @param array $conditions Conditions with column, operation and value |
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* @param boolean $having This defines if having or where parts are parsed |
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* |
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* @return array |
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**/ |
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public static function parse(array $conditions, $having = false) |
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{ |
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$assoc = []; |
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$short = ($having === true) ? 'hav' : 'con'; |
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$query = ''; |
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// Check if array dimensions are fine |
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if (isset($conditions[0]) && !is_array($conditions[0])) { |
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$conditions = [$conditions]; |
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} |
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foreach ($conditions AS $num => $con) { |
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// Process condition parts |
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$sub = self::_parts($short, $num, (array)$con); |
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// Append operator and add part to result |
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$query .= self::_append($sub['query'], $num, (array)$con); |
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$assoc = array_merge($assoc, $sub['assoc']); |
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} |
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$result = ['query' => $query, 'assoc' => $assoc]; |
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return $result; |
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} |
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/** |
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* Generate part of a single condition |
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* |
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* @param string $short Shorthandle for assoc array keys, e.g. con |
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* @param integer $num Number of condition as an integer |
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* @param array $con Condition details as an array |
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* |
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* @return array |
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**/ |
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private static function _parts($short, $num, array $con) |
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{ |
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$key = 0; |
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$assoc = []; |
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$query = ''; |
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// Bind must be unique per query condition |
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$bind = $short . $num; |
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// Append simple oerator checks |
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if (in_array($con[1], self::$_operators)) { |
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$query .= $con[0] . ' ' . $con[1] . ' :' . $bind; |
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$assoc[$bind] = $con[2]; |
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} elseif ($con[1] == 'like') { |
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// Append like comparisons |
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$query .= $con[0] . ' LIKE :' . $bind; |
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$assoc[$bind] = $con[2]; |
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} elseif ($con[1] == 'between') { |
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// Append between checks |
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$query .= $con[0] . ' BETWEEN :' . $bind |
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. 'b1 AND :' . $bind . 'b2'; |
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$assoc[$bind . 'b1'] = $con[2][0]; |
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$assoc[$bind . 'b2'] = $con[2][1]; |
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} elseif ($con[1] == 'in') { |
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// Append in array checks |
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$query .= $con[0] . ' IN ('; |
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foreach ($con[2] AS $val) { |
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$query .= ':' . $bind . 'i' . $key . ', '; |
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$assoc[$bind . 'i' . $key] = $val; |
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$key++; |
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} |
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$query = substr($query, 0, -2) . ')'; |
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} |
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// Create result array |
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$result = ['query' => $query, 'assoc' => $assoc]; |
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return $result; |
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} |
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/** |
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* Append operators to conditions |
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* |
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* @param string $query Query string |
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* @param integer $num Number of condition as an integer |
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* @param array $con Condition details as an array |
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* |
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* @return string |
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**/ |
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private static function _append($query, $num, array $con) |
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{ |
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// Prepend with NOT if set |
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if (isset($con[3]) && $con[3] == true) { |
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$query = 'NOT ' . $query; |
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} |
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// Prepend with AND or OR if not first |
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if ($num != 0) { |
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$pre = ' AND '; |
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if (isset($con[4]) && $con[4] == true) { |
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$pre = ' OR '; |
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} |
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$query = $pre . $query; |
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} |
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return $query; |
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} |
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} |
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csphere-cms /
cSphere
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