Update new xml query classes with xe 1.5

with improved query argument support and update and delete queries

git-svn-id: http://xe-core.googlecode.com/svn/branches/1.5.0-DB@8378 201d5d3c-b55e-5fd7-737f-ddc643e51545

classes/db/queryparts/expression/ClickCountExpression.class.php

@@ -0,0 +1,33 @@
+<?php 
+
+	/**
+	 * @class ClickCountExpression
+	 * @author Arnia Software
+	 * @brief 
+	 *
+	 */
+
+	class ClickCountExpression extends SelectExpression {
+		var $click_count;
+	
+		function ClickCountExpression($column_name, $alias = NULL, $click_count = false){
+			parent::SelectExpression($column_name, $alias);
+			
+			if(!is_bool($click_count)){
+				error_log("Click_count value for $column_name was not boolean", 0);
+				$this->click_count = false;
+				return;
+			}
+			$this->click_count = $click_count;
+		}
+		
+		function show() {
+			return $this->click_count;
+		}
+		
+		function getExpression(){
+			return "$this->column_name = $this->column_name + 1";
+		}
+	}
+
+?>

classes/db/queryparts/expression/DeleteExpression.class.php

@@ -0,0 +1,34 @@
+<?php 
+	/**
+	 * @class DeleteExpression
+	 * @author Arnia Software
+	 * @brief 
+	 *
+	 */
+
+	class DeleteExpression extends Expression {
+		var $value;
+		
+		function DeleteExpression($column_name, $value){
+			parent::Expression($column_name);
+			$this->value = $value;
+		}
+		
+		function getExpression(){
+			return "$this->column_name = $this->value";
+		}
+		
+		function getValue(){
+			// TODO Escape value according to column type instead of variable type
+			if(!is_numeric($this->value)) return "'".$this->value."'";
+			return $this->value;
+		}
+		
+		function show(){
+			if(!$this->value) return false;
+			return true;
+		}
+	}
+
+
+?>

classes/db/queryparts/expression/Expression.class.php

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+<?php
+	/**
+	 * @class Expression
+	 * @author Corina
+	 * @brief Represents an expression used in select/update/insert/delete statements
+	 * 
+	 *  Examples (expressions are inside double square brackets):
+	 *  	select [[columnA]], [[columnB as aliasB]] from tableA
+	 *  	update tableA set [[columnA = valueA]] where columnB = something
+	 *
+	 */
+
+	class Expression {
+		var $column_name;
+		
+		function Expression($column_name){
+			$this->column_name = $column_name;
+		}
+		
+		function getColumnName(){
+			return $this->column_name;
+		}
+		
+		function show() {
+			return false;
+		}
+		
+		function getExpression() {
+		}
+	}

classes/db/queryparts/expression/InsertExpression.class.php

@@ -0,0 +1,28 @@
+<?php 
+
+	/** 
+	 * @class InsertExpression
+	 * @author Arnia Software
+	 * @brief 
+	 *
+	 */
+
+	class InsertExpression extends Expression {
+		var $value;
+		
+		function InsertExpression($column_name, $value){
+			parent::Expression($column_name);
+			$this->value = $value;
+		}
+		
+		function getValue(){
+			return $this->value;
+		}
+		
+		function show(){
+			if(!isset($this->value)) return false;
+			return true;
+		}
+	}
+
+?>

classes/db/queryparts/expression/SelectExpression.class.php

@@ -0,0 +1,32 @@
+<?php 
+
+	/**
+	 * @class SelectExpression
+	 * @author Arnia Software
+	 * @brief Represents an expresion that appears in the select clause
+	 * 
+	 * @remarks  
+	 * 		$column_name can be:
+	 *  		- a table column name
+	 *  		- an sql function - like count(*)
+	 *	  		- an sql expression - substr(column_name, 1, 8) or score1 + score2
+	 *		$column_name is already escaped
+	 */
+
+	class SelectExpression extends Expression {
+		var $column_alias;
+		
+		function SelectExpression($column_name, $alias = NULL){
+			parent::Expression($column_name);
+			$this->column_alias = $alias;
+		}
+		
+		function getExpression() {
+			return sprintf("%s%s", $this->column_name, $this->column_alias ? " as ".$this->column_alias : "");
+		}
+		
+		function show() {
+			return true;
+		}
+	}
+?>

classes/db/queryparts/expression/StarExpression.class.php

@@ -0,0 +1,16 @@
+<?php 
+
+	/**
+	 * @class StarExpression
+	 * @author Corina
+	 * @brief Represents the * in 'select * from ...' statements 
+	 *
+	 */
+
+	class StarExpression extends SelectExpression {
+		
+		function StarExpression(){
+			parent::SelectExpression("*");
+		}
+	}
+?>

classes/db/queryparts/expression/UpdateExpression.class.php

@@ -0,0 +1,34 @@
+<?php 
+	/**
+	 * @class UpdateExpression
+	 * @author Arnia Software
+	 * @brief 
+	 *
+	 */
+
+	class UpdateExpression extends Expression {
+		var $value;
+		
+		function UpdateExpression($column_name, $value){
+			parent::Expression($column_name);
+			$this->value = $value;
+		}
+		
+		function getExpression(){
+			return "$this->column_name = $this->value";
+		}
+		
+		function getValue(){
+			// TODO Escape value according to column type instead of variable type
+			if(!is_numeric($this->value)) return "'".$this->value."'";
+			return $this->value;
+		}
+		
+		function show(){
+			if(!$this->value) return false;
+			return true;
+		}
+	}
+
+
+?>