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<?php
/**
* Utility class
* Provides basic utility functions needed in multiple different locations
* @author Nick Korbel <lqqkout13@users.sourceforge.net>
* @version 02-18-06
* @package phpScheduleIt
*
* Copyright (C) 2003 - 2007 phpScheduleIt
* License: GPL, see LICENSE
*/
class Utility
{
function Utility() { }
/**
* Returns a query string that will allow the user to sort on the given order in the opposite direction
* @param string $query_string the full current query string to parse
* @param string $desired_order the desired sort order of the new result set
* @param string $vert_key the query string key name of the vertical sort order
* @param string $order_key the query string key name of the column sort order
* @return the full query string with the correct order key/value and vertical key/value including the question mark
*/
function getSortingUrl($query_string, $desired_order, $vert_key = 'vert', $order_key = 'order') {
$query_string = str_replace('?' ,'', $query_string); // Get rid of the ? to simplify the regexes
$return_query = $query_string;
$query_pairs = $this->_buildPairs($query_string);
$is_desired_order = false;
$desired_vert = 'ASC'; // New sort order, always use ASC
if (array_key_exists($order_key, $query_pairs)) {
// Figure out the current order
$cur_order = $query_pairs[$order_key];
$is_desired_order = ($cur_order == $desired_order);
// If it is already in the desired order, just flip the vert
if (!$is_desired_order) {
$query_pairs[$order_key] = $desired_order;
}
}
else {
// No order is in the current query string, so we can just append
$query_pairs[$order_key] = $desired_order;
}
if (array_key_exists($vert_key, $query_pairs)) {
// Figure out current vert order
$cur_vert = $query_pairs[$vert_key];
if ($is_desired_order) {
// It's in the correct order, just flip the vert
$desired_vert = $this->_flipVert($cur_vert);
}
$query_pairs[$vert_key] = $desired_vert;
}
else {
// No order is in the current query string, so we can just append
$query_pairs[$vert_key] = $desired_vert;
}
$return = '';
foreach ($query_pairs as $param => $value) {
$return .= "$param=$value&";
}
return '?' . substr($return, 0, strlen($return) - 5); // Remove the ending &
}
/**
* Takes a query string and builds the pairs of paramaters in a hash with param name as the key and the param value as the hash value
* @param string $query_string the query string to parse
* @return array of query string parameter pair values
*/
function _buildPairs($query_string) {
$pairs = array();
if (empty($query_string)) {
return $pairs;
}
$query_string = str_replace('?' ,'', $query_string); // Get rid of the ? because it will screw up the pairs
$query_params = explode('&', $query_string);
for ($i = 0; $i < count($query_params); $i++) {
list($key, $value) = explode('=', $query_params[$i]);
$pairs[$key] = $value;
}
return $pairs;
}
/**
* Takes a SQL vertical sorting keyword and flips it to the opposite direction
* @param string $cur_vert the current sorting direction keyword
* @return the opposite direction SQL sorting keyword
*/
function _flipVert($cur_vert) {
$flipped_vert = 'ASC';
if (strtoupper($cur_vert) == 'ASC') {
$flipped_vert = 'DESC';
}
return $flipped_vert;
}
/**
* Gets an array of resource ids to add to this reservation
* @param array $orig the array of items who were originally in the list
* @param array $selected the array of currently selected items
* @return array of items is to add to the original list
*/
function getAddedItems($orig, $selected) {
$added = array();
if ( !is_null($orig) && count($orig) > 0 ) {
$diff = array_diff($selected, $orig);
foreach($diff as $idx => $val) {
$added[] = $val;
}
}
else {
$added = $selected;
}
return $added;
}
/**
* Gets an array of resource ids to remove from this reservation
* @param array $orig the array of items who were originally in the list
* @param array $selected the array of currently selected items
* @return array of items to remove from the original list
*/
function getRemovedItems($orig, $selected) {
$removed = array();
if ( !is_null($orig) && count($orig) > 0 ) {
$diff = array_diff($orig, $selected);
foreach($diff as $idx => $val) {
$removed[] = $val;
}
}
return $removed;
}
}
?>