egroupware/etemplate/inc/class.ajax_select_widget.inc.php

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<?php
/**
* eGroupWare eTemplate Extension - AJAX Select Widget
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage extensions
* @link http://www.egroupware.org
* @author Nathan Gray <nathangray@sourceforge.net>
* @version $Id$
*/
/**
* AJAX Select Widget
*
* Using AJAX, this widget allows a type-ahead find similar to a ComboBox, where as the user enters information,
* a drop-down box is populated with the n closest matches. If the user clicks on an item in the drop-down, that
* value is selected.
* n is the maximum number of results set in the user's preferences.
* The user is restricted to selecting values in the list.
* This widget can get data from any function that can provide data to a nextmatch widget.
* This widget is generating html, so it does not work (without an extra implementation) in an other UI
*/
class ajax_select_widget
{
var $public_functions = array(
'pre_process' => True,
'post_process' => True,
'ajax_search' => True,
);
var $human_name = 'AJAX Select'; // this is the name for the editor
// Accepted option keys if you're passing in an array to set up the widget
// Additional options will be passed to the search query
public static $known_options = array(
// These ones can be passed in from eTemplate editor in size
'get_rows',
'get_title',
'id_field',
'template',
'filter',
'filter2',
'link',
'icon',
// Pass by code only
'values',
);
// Flag used in id_field to indicate that the key of the record should be used as the value
const ARRAY_KEY = 'array_key';
// Array of static values to emulate a combo-box, with no DB lookup
protected static $static_values = array();
private $debug = false;
function ajax_select_widget($ui='')
{
switch($ui)
{
case '':
case 'html':
$this->ui = 'html';
break;
default:
echo "UI='$ui' not implemented";
}
return 0;
}
/**
* pre-processing of the extension
*
* This function is called before the extension gets rendered
*
* @param string $name form-name of the control
* @param mixed &$value value / existing content, can be modified
* @param array &$cell array with the widget, can be modified for ui-independent widgets
* @param array &$readonlys names of widgets as key, to be made readonly
* @param mixed &$extension_data data the extension can store persisten between pre- and post-process
* @param object &$tmpl reference to the template we belong too
* @return boolean true if extra label is allowed, false otherwise
*/
function pre_process($name,&$value,&$cell,&$readonlys,&$extension_data,&$tmpl)
{
if($this->debug) {
echo __METHOD__ . '<br />';
printf("Name:%20s<br />", $name);
echo 'Value:';
_debug_array($value);
echo 'Cell:';
_debug_array($cell);
echo 'Readonlys:';
_debug_array($readonlys);
echo 'Extension_data:';
_debug_array($extension_data);
}
// Get Options
$options = array();
if(!is_array($cell['size'])) {
list(
$options['get_rows'],
$options['get_title'],
$options['id_field'],
$options['template'],
$options['filter'],
$options['filter2'],
$options['link'],
$options['icon']
) = explode(',', $cell['size']);
} else {
$options = $cell['size'];
}
if(is_array($value)) {
$options = array_merge($options, $value);
}
if(!$options['template']) {
$options['template'] = 'etemplate.ajax_select_widget.row';
}
if(array_key_exists('values', $options)) {
if($options['values']) {
self::$static_values[$name] = $options['values'];
}
unset($options['values']);
}
$onchange = ($cell['onchange'] ? $cell['onchange'] : 'false');
// Set current value
if(!is_array($value)) {
$current_value = $value;
} elseif($value[$options['id_field']]) {
$current_value = $value[$options['id_field']];
}
$extension_data['old_value'] = $value;
list($title_app, $title_class, $title_method) = explode('.', $options['get_title']);
if($title_app && $title_class) {
if (is_object($GLOBALS[$title_class])) { // use existing instance (put there by a previous CreateObject)
$title_obj =& $GLOBALS[$title_class];
} else {
$title_obj =& CreateObject($title_app . '.' . $title_class);
}
}
if(!is_object($title_obj) || !method_exists($title_obj,$title_method)) {
echo "$entry_app.$entry_class.$entry_method is not a valid method for getting the title";
} elseif($current_value) {
if($title_method == 'array_title' && $title_class == __CLASS__) {
$title = self::$title_method($current_value, $name);
} else {
$title = $title_obj->$title_method($current_value);
}
}
// Check get_rows method
list($get_rows_app, $get_rows_class, $get_rows_method) = explode('.', $options['get_rows']);
if($get_rows_app && $get_rows_class) {
if (is_object($GLOBALS[$get_rows_class])) { // use existing instance (put there by a previous CreateObject)
$get_rows_obj =& $GLOBALS[$get_rows_class];
} else {
$get_rows_obj =& CreateObject($get_rows_app . '.' . $get_rows_class);
}
if(!is_object($get_rows_obj) || !method_exists($get_rows_obj, $get_rows_method)) {
echo "$get_rows_app.$get_rows_class.$get_rows_method is not a valid method for getting the rows";
}
}
// Set up widget
$cell['type'] = 'template';
$cell['size'] = $cell['name'];
$value = array('value' => $current_value, 'search' => $title);
$widget = new etemplate('etemplate.ajax_select_widget');
$widget->no_onclick = True;
// Link if readonly & link is set
$search =& $widget->get_widget_by_name('search');
if(($cell['readonly'] || $readonlys['search']) && $options['link']) {
$cell['readonly'] = false;
if(!is_array($readonlys)) {
$readonlys = array('search' => true);
} else {
$readonlys['search'] = true;
}
$search['type'] = 'label';
$search['no_lang'] = 1;
$search['size'] = ',' . $options['link'];
$extension_data['readonly'] = true;
} else {
$search['type'] = 'text';
$search['size'] = '';
if($current_value == '' && $options['id_field'] == self::ARRAY_KEY) {
$search['blur'] = lang('Search...');
}
}
// Icon
$icon =& $widget->get_widget_by_path('/0/1A');
$icon['name'] = $options['icon'];
$cell['obj'] = &$widget;
// Save static values, if set
if(self::$static_values[$name]) {
$extension_data['values'] = self::$static_values[$name];
}
// Save options for post_processing
$extension_data['options'] = $options;
$extension_data['needed'] = $cell['needed'];
// xajax
$GLOBALS['egw_info']['flags']['include_xajax'] = True;
// JavaScript
// converter doesn't handle numeric well
foreach($options as $key => &$value) {
if(is_numeric($value)) {
$value = (string)$value;
}
if($value === null) {
unset($options[$key]);
}
}
$options = $GLOBALS['egw']->js->convert_phparray_jsarray("options['$name']", $options, true);
$GLOBALS['egw']->js->set_onload("if(!options) {
var options = new Object();
}\n
$options;\n
ajax_select_widget_setup('$name', '$onchange', options['$name'], '" . $GLOBALS['egw_info']['flags']['currentapp'] . "');
");
$GLOBALS['egw']->js->validate_file('', 'ajax_select', 'etemplate');
return True; // no extra label
}
function post_process($name,&$value,&$extension_data,&$loop,&$tmpl,$value_in)
{
//echo "<p>ajax_select_widget.post_process: $name = "; _debug_array($value_in);_debug_array($extension_data);
if(!is_array($value_in)) {
$value_in = $extension_data['old_value'];
}
// They typed something in, but didn't choose a result
if(!$value_in['value'] && $value_in['search']) {
list($get_rows_app, $get_rows_class, $get_rows_method) = explode('.', $extension_data['options']['get_rows']);
if($get_rows_app && $get_rows_class) {
if (is_object($GLOBALS[$get_rows_class])) { // use existing instance (put there by a previous CreateObject)
$get_rows_obj =& $GLOBALS[$get_rows_class];
} else {
$get_rows_obj =& CreateObject($get_rows_app . '.' . $get_rows_class);
}
if(!is_object($get_rows_obj) || !method_exists($get_rows_obj, $get_rows_method)) {
echo "$get_rows_app.$get_rows_class.$get_rows_method is not a valid method for getting the rows";
} else {
$query = array_merge($extension_data['options'], $value_in);
$count = $get_rows_obj->$get_rows_method($query, $results);
if($count == 1) {
$value = $results[0][$extension_data['options']['id_field']];
return true;
} elseif ($count > 1) {
etemplate::set_validation_error($name,lang("More than 1 match for '%1'",$value_in['search']));
$loop = true;
return false;
} else {
$value = $value_in['search'];
return true;
}
}
}
} elseif ($extension_data['readonly']) {
$value = $extension_data['old_value'];
return true;
} elseif ($value_in['search'] == '') {
// They're trying to clear the form
$value = null;
// True if not needed, false if needed and they gave no value
$return = !($extension_data['needed'] && trim($value_in['value']) == '');
if(!$return) {
$value = $extension_data['old_value'];
etemplate::set_validation_error($name,lang('Required'));
$loop = true;
}
if($this->debug && $loop) {
echo 'Looping...<br />Returning ' . $return . '<br />';
}
return $return;
} else {
if (stripos($extension_data['options']['id_field'], ";")) {
$expected_fields = array_flip(explode(";", $extension_data['options']['id_field']));
$fields_n_values = explode(";", $value_in['value']);
foreach ($fields_n_values as $field_n_value) {
list($myfield, $myvalue) = explode(":", $field_n_value);
if (array_key_exists($myfield, $expected_fields)) {
$value_in[$myfield] = $myvalue;
}
}
$value = $value_in;
} else {
$value = $value_in['value'];
}
return true;
}
}
function ajax_search($id, $value, $set_id, $query, $etemplate_id) {
$base_id = substr($id, 0, strrpos($id, '['));
$result_id = ($set_id ? $set_id : $base_id . '[results]');
$response = new xajaxResponse();
if($query['get_rows']) {
list($app, $class, $method) = explode('.', $query['get_rows']);
$this->bo = CreateObject($app . '.' . $class);
unset($query['get_rows']);
} else {
return $response->getXML();
}
// Expand lists
foreach($query as $key => &$row) {
if($row && strpos($row, ',')) {
$query[$key] = explode(',', $row);
}
// sometimes it sends 'null' (not null)
if($row == 'null') {
unset($query[$key]);
} elseif (is_string($row) && strtolower($row) == 'false') {
$row = false;
}
}
$query['search'] = $value;
if($query['id_field'] == self::ARRAY_KEY) {
// Pass base_id so we can get the right values
$query['field_name'] = $base_id;
// Check for a provided list of values
if($request = etemplate_request::read($etemplate_id)) {
$extension_data = $request->extension_data[$base_id];
if(is_array($extension_data) && $extension_data['values']) {
self::$static_values[$base_id] = $extension_data['values'];
}
}
}
$result_list = array();
$readonlys = array();
if(is_object($this->bo)) {
$count = $this->bo->$method($query, $result_list, $readonlys);
}
if(is_array($count)) {
$count = count($result_list);
}
$response->addScript("remove_ajax_results('$result_id')");
if($count > 0) {
$response->addScript("add_ajax_result('$result_id', '', '', '" . lang('Select') ."');");
$count = 0;
if(!$query['template'] || $query['template'] == 'etemplate.ajax_select_widget.row') {
$query['template'] = 'etemplate.ajax_select_widget.row';
}
foreach($result_list as $key => &$row) {
if(!is_array($row)) {
if($query['id_field'] == self::ARRAY_KEY) {
if(!is_array($row)) {
// Restructure $row to be an array
$row = array(
self::ARRAY_KEY => $key,
'id_field' => $key,
'title' => $row
);
}
} else {
continue;
}
}
//check for multiple id's
//this if control statement is to determine if there are multiple ids in the ID FIELD of the Ajax Widget
if(stristr($query['id_field'], ';') != FALSE) {
$id_field_keys = explode(';', $query['id_field']);
if($query['get_title']) {
//the title will always be created using the first ID FIELD
if($row[$id_field_keys[0]]) {
$row['title'] = ExecMethod($query['get_title'], $row[$id_field_keys[0]]);
}
}
foreach($id_field_keys as $value) {
$id_field_keys_values[] = $value.':'.$row[$value];
}
$row['id_field'] = implode(';',$id_field_keys_values);
unset($id_field_keys_values);
} else {
if($query['id_field'] && $query['get_title']) {
if($row[$query['id_field']] && $query['id_field'] != self::ARRAY_KEY) {
$row['title'] = ExecMethod($query['get_title'], $row[$query['id_field']]);
}
}
if($query['id_field'] != self::ARRAY_KEY) {
$row['id_field'] = $row[$query['id_field']];
}
}
// If we use htmlspecialchars, it causes issues with mixed quotes. addslashes() seems to handle it.
$row['id_field'] = addslashes($row['id_field']);
$data = ($query['nextmatch_template']) ? array(1=>$row) : $row;
$widget =& CreateObject('etemplate.etemplate', $query['template']);
$html = addslashes(str_replace("\n", '', $widget->show($data, '', $readonlys)));
$row['title'] = addslashes($row['title']);
$response->addScript("add_ajax_result('$result_id', '${row['id_field']}', '" . $row['title'] . "', '$html');");
$count++;
if($count > $GLOBALS['egw_info']['user']['preferences']['common']['maxmatchs']) {
$response->addScript("add_ajax_result('$result_id', '', '', '" . lang("%1 more...", (count($result_list) - $count)) . "');");
break;
}
}
} else {
$response->addScript("add_ajax_result('$result_id', '', '', '" . lang('No matches found') ."');");
}
return $response->getXML();
}
/**
* Use a simple array to get the title
* Values should be passed in to the widget as an array in $size['values']
*/
protected function array_title($id, $name) {
if(trim($id) == '') {
return lang('Search');
}
return self::$static_values[$name][$id];
}
/**
* Use a simple array to get the results
* Values should be passed in to the widget as an array in $size['values']
*/
protected function array_rows(&$query, &$result) {
foreach( self::$static_values[$query['field_name']] as $key => $value) {
if($query['search'] && stripos($value, $query['search']) === false) continue;
$result[$key] = $value;
}
$count = count($result);
$result = array_slice($result, $query['start'], $query['num_rows']);
return $count;
}
}