1: <?php
  2: /*****************************************************************************************
  3:  * X2Engine Open Source Edition is a customer relationship management program developed by
  4:  * X2Engine, Inc. Copyright (C) 2011-2016 X2Engine Inc.
  5:  * 
  6:  * This program is free software; you can redistribute it and/or modify it under
  7:  * the terms of the GNU Affero General Public License version 3 as published by the
  8:  * Free Software Foundation with the addition of the following permission added
  9:  * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 10:  * IN WHICH THE COPYRIGHT IS OWNED BY X2ENGINE, X2ENGINE DISCLAIMS THE WARRANTY
 11:  * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 12:  * 
 13:  * This program is distributed in the hope that it will be useful, but WITHOUT
 14:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 15:  * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
 16:  * details.
 17:  * 
 18:  * You should have received a copy of the GNU Affero General Public License along with
 19:  * this program; if not, see http://www.gnu.org/licenses or write to the Free
 20:  * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 21:  * 02110-1301 USA.
 22:  * 
 23:  * You can contact X2Engine, Inc. P.O. Box 66752, Scotts Valley,
 24:  * California 95067, USA. or at email address contact@x2engine.com.
 25:  * 
 26:  * The interactive user interfaces in modified source and object code versions
 27:  * of this program must display Appropriate Legal Notices, as required under
 28:  * Section 5 of the GNU Affero General Public License version 3.
 29:  * 
 30:  * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 31:  * these Appropriate Legal Notices must retain the display of the "Powered by
 32:  * X2Engine" logo. If the display of the logo is not reasonably feasible for
 33:  * technical reasons, the Appropriate Legal Notices must display the words
 34:  * "Powered by X2Engine".
 35:  *****************************************************************************************/
 36: 
 37: /**
 38:  * Utility class for simplifying generation SQL parameters
 39:  */
 40: class QueryParamGenerator extends CComponent {
 41: 
 42:     /**
 43:      * Number of parameters bound 
 44:      */
 45:     private $count = 0;
 46: 
 47:     /**
 48:      * Parameter namespace 
 49:      */
 50:     private $prefix = ':QueryParamGenerator';
 51: 
 52:     /**
 53:      * Bound parameters 
 54:      */
 55:     private $params = array ();
 56: 
 57:     /**
 58:      * @param string $prefix parameter prefix which should be used to prevent parameter name 
 59:      *  collisions
 60:      */
 61:     public function __construct ($prefix=':QueryParamGenerator') {
 62:         $this->prefix = $prefix;
 63:     }
 64: 
 65:     /**
 66:      * Binds and array of parameters, optionally generating a string representation of the array 
 67:      * which can be embedded into a SQL in statement
 68:      */
 69:     public function bindArray (array $values, $createInStmt=false) {
 70:         if ($createInStmt) {
 71:             $inStmt = '(';
 72:         }
 73:         foreach ($values as $val) {
 74:             $currParam = $this->prefix.++$this->count;
 75:             $this->params[$currParam] = $val;
 76:             if ($createInStmt) {
 77:                 if ($inStmt !== '(') {
 78:                     $inStmt .= ',';
 79:                 }
 80:                 $inStmt.=$currParam;
 81:             }
 82:         }
 83:         if ($createInStmt) {
 84:             $inStmt .= ')';
 85:             return $inStmt;
 86:         }
 87:     }
 88: 
 89:     /**
 90:      * Bind a value to a parameter name 
 91:      * @return string the generated parameter name
 92:      */
 93:     public function nextParam ($val) {
 94:         $currParam = $this->prefix.++$this->count;
 95:         $this->params[$currParam] = $val;
 96:         return $currParam;
 97:     }
 98: 
 99:     /**
100:      * @return string the name of the most recently generated parameter
101:      */
102:     public function currParam () {
103:         return $this->prefix.$this->count;
104:     }
105: 
106:     public function setParam ($val) {
107:         $this->params[$this->currParam ()] = $val;
108:     }
109: 
110:     /**
111:      * @return array all generated parameters (bound values indexed by parameter names)
112:      */
113:     public function getParams () {
114:         return $this->params;
115:     }
116: 
117:     /**
118:      * Merge the internal parameters array with an arbitrary number of other parameters arrays
119:      * @param {...array}
120:      * @throws CException if parameter name collision occurs 
121:      */
122:     public function mergeParams () {
123:         $arguments = func_get_args ();
124:         foreach ($arguments as $params) {
125:             if (count (array_intersect (array_keys ($params), $this->params))) {
126:                 throw new CException ('parameter name collision');
127:             }
128:             $this->params = array_merge ($this->params, $params);
129:         }
130:         return $this;
131:     }
132: }
133: