<?php

/*
  $Id$

  This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
  Copyright (C) 2009 - 2012  Pavel Pozdnyak
                2009 - 2012  Roland Gruber

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */


/**
 * Manages Asterisk extensions.
 *
 * @package modules
 *
 * @author Pavel Pozdniak
 * @author Roland Gruber
 */

/**
 * Manages Asterisk extensions.
 *
 * @package modules
 */
class asteriskExtensionNewUI extends baseModule {

    /** if true then only Asterisk accounts are shown as possible owners */
    private $filterOwnerForAsteriskAccounts = true;

    /** if true then the tree suffix will be used to search potential owners */
    private $searchOwnersInTreeSuffix = false;
    /*     * Containe all attributes information for set of accounts */
    private $extensionRows = array();
    /*     * Containe all original attributes information for set of accounts */
    private $extensionRowsOrig = array();
    /*     * Extension owners */
    private $extensionOwners = array();
    private $addRuleFlag = false;

    /**
     * Returns meta data that is interpreted by parent class
     *
     * @return array array with meta data
     */
    function get_metaData() {
        $return = array();
        // manages users accounts
        $return["account_types"] = array("asteriskExtNewUI");
        $return["is_base"] = true;
        // RDN attribute
        $return["RDN"] = array("cn" => "normal");
        // LDAP filter
        $return["ldap_filter"] = array('or' => "(objectClass=AsteriskExtension)");
        // alias name
        $return["alias"] = _("Asterisk extension New UI");
        // module dependencies
        $return['dependencies'] = array('depends' => array(), 'conflicts' => array());
        // managed object classes
        $return['objectClasses'] = array('AsteriskExtension', 'groupOfNames');
        // managed attributes
        $return['attributes'] = array('cn', 'member', 'AstExtension', 'AstPriority',
            'AstApplication', 'AstApplicationData', 'AstContext');
        //ldap aliases
        $return['LDAPaliases'] = array('commonName' => 'cn');
        // icon
        $return['icon'] = 'asterisk.png';
        // help
        $return['help'] = array(
            'AstApplicationData' => array(
                "Headline" => _("Application data"), 'attr' => 'AstApplicationData',
                "Text" => _("This defines what application Asterisk has to start for this user (e.g. SIP/user1).")
            ),
            'AstContext' => array(
                "Headline" => _("Account context"), 'attr' => 'AstContext',
                "Text" => _("The account context stores information about the dial plan.")
            ),
            'AstExtension' => array(
                "Headline" => _("Extension name"), 'attr' => 'AstExtension',
                "Text" => _("The name of the extension (e.g. voicemail or sip).")
            ),
            'AstPriority' => array(
                "Headline" => _("Priority"), 'attr' => 'AstPriority',
                "Text" => _("The priority is a sequence number used to order the execution of commands. Commands are executed beginning with the lowest sequence number.")
            ),
            'AstApplication' => array(
                "Headline" => _("Application"), 'attr' => 'AstApplication',
                "Text" => _("The name of a command to execute. The available commands may be listed at the Asterisk command line by executing \"core show applications\".")
            ),
            'member' => array(
                "Headline" => _("Extension owners"), 'attr' => 'member',
                "Text" => _("DNs of the extension owners")
            ),
            'cn' => array(
                "Headline" => _("Common name"), 'attr' => 'cn',
                "Text" => _("Common name of the Asterisk extension.")
            ),
            'ownerOptions' => array(
                "Headline" => _("Options"),
                "Text" => _("These options change the list of potential extension owners below. You can select to show Asterisk accounts or all users. It is also possible to search the tree suffix if you have users which are not in the standard user suffix.")
            ),
            'MigrateSuffix' => array(
                "Headline" => _("Suffix to migrate"),
                "Text" => _("This is suffix of LDAP tree to migrate entryes after testing or other staff.")
            ),
            'UseCreatorAsOwner' => array(
                "Headline" => _("Use an extension creator as its owner"),
                "Text" => _("This feature hide owner's selection button from an extension managment interface and set a logged in user as an extension owner. You can use this feature as a leverage to grand/reject users to manage thair extensions")
            ),
        );

        // profile options
        $profileContainer = new htmlTable();
        $profileContainer->addElement(new htmlTableExtendedInputField(_('Account context'), 'AsteriskExtension_AstContext', null, 'AstContext'), true);
        $return['profile_options'] = $profileContainer;
        $return['profile_mappings'] = array(
            'AsteriskExtension_AstContext' => 'AstContext',
        );
        // available PDF fields
        $return['PDF_fields'] = array(
            'AstContext' => _('Account context'),
            'AstExtension' => _('Extension name'),
            'member' => _('Extension owners'),
            'cn' => _('Common name'),
            'rules' => _('Rules'),
        );
        return $return;
    }

    /**
     * This function fills the error message array with messages
     */
    function load_Messages() {
        $this->messages['cn'][0] = array('ERROR', _('Please enter a common name.'));
        $this->messages['AstApplication'][0] = array('ERROR', _('Please enter the application.'));
        $this->messages['AstApplicationData'][0] = array('ERROR', _('Please enter the application data.'));
        $this->messages['AstContext'][0] = array('ERROR', _('Please enter the extension context.'));
        $this->messages['AstExtension'][0] = array('ERROR', _('Please enter the extension name.'));
        $this->messages['AstExtension'][1] = array('ERROR', _('Extension with this name is already exists.'));
        $this->messages['AstPriority'][0] = array('ERROR', _('Please enter the priority.'));
        $this->messages['AstExtensionAstPriority'][0] = array('ERROR', _('This pair of extension name and priority already exists.'));
        $this->messages['member'][0] = array('ERROR', _('Please add at least one extension owner.'));
    }

    /**
     * This function will create the meta HTML code to show a page with all attributes.
     *
     * @return htmlElement HTML meta data
     */
    function display_html_attributes() {
        //Set default owner as logged in user if no other owner is set
        if (  ! $this->isExtensionOwnerSet()){
                $this->setDefaultExtensionOwner();
        }
        
    	$return = new htmlTable();

        $extName = '';
        if (isset($this->attributes['AstExtension'][0])) {
            $extName = $this->attributes['AstExtension'][0];
        }
        if (isset($this->extensionRows[0]['astextension'][0])) {
            $extName = $this->extensionRows[0]['astextension'][0];
        }

        $this->render_extensions_by_priority($extName, $return);

        // owners
        $this->render_exten_owners_set_controls($return);

        return $return;
    }

    /*
     * if necessary this function prints managment elements to manipulate owners of an extension.
     */

    function render_exten_owners_set_controls($renderContainer) {
        $renderContainer->addElement(new htmlOutputText(_("Extension owners") . '*'));
        $renderContainer->addElement(new htmlAccountPageButton(get_class($this), 'user', 'open', _('Change')));
        $renderContainer->addElement(new htmlHelpLink('member'));
        $renderContainer->addNewLine();
        $renderContainer->addElement(new htmlOutputText(''));
        $ownerList = new htmlTable();
        if ((!isset($this->extensionOwners) || sizeof($this->extensionOwners) == 0) && isset($this->extensionRows[0]['member'])) {
            $this->extensionOwners = $this->extensionRows[0]['member'];
        }
        if (isset($this->extensionOwners)) {
            for ($i = 0; $i < sizeof($this->extensionOwners); $i++) {
                $ownerList->addElement(new htmlOutputText(getAbstractDN($this->extensionOwners[$i])), true);
            }
        }
        $renderContainer->addElement($ownerList);
    }

    function load_extension_parts($extension) {
        if (!isset($this->extensionRows[0]['astcontext'][0])) {
            //$entries = searchLDAPByAttribute("AstExtension", $extension, $searchClass, array('cn', 'AstContext', 'AstPriority',
            //    'AstApplication', 'AstApplicationData', 'AstExtension', 'member', 'ObjectClass'), array($searchScope));
            $entries = searchLDAP($this->getAccountContainer()->dnSuffix, '(&(objectClass=AsteriskExtension)(AstExtension=' . $extension . '))', array('cn', 'AstContext', 'AstPriority',
                'AstApplication', 'AstApplicationData', 'AstExtension', 'member', 'ObjectClass'));

            $entries = $this->array_sort($entries, 'astpriority');
            $this->extensionRowsOrig = $entries;
            $this->extensionRows = $entries;
        } else {
            $entries = $this->extensionRows;
        }
        return $entries;
    }

    /*
     * Get array of arrays of such form
     * [0: ['AstContext': "default", 'AstPriority': 1, 'AstApplicationData': 'Sip']
     *  1:...
     * ]
     */

    function render_extensions_by_priority($extension, $renderContainer) {
        if (!isset($extension) || $extension == "") {
            $extension = "";
        }


        $entries = $this->load_extension_parts($extension);

        if ($this->getAccountContainer()->isNewAccount) {
            $suggestedExtName = $this->generateNextExtensionName();
            $extNameInput = new htmlTableExtendedInputField(_("Extension name"), 'AstExtension', $suggestedExtName, 'AstExtension');
            $extNameInput->setRequired(true);
            $renderContainer->addElement($extNameInput, false);
            $renderContainer->addElement(new htmlOutputText(_("We suggest: " . $suggestedExtName)), true);
        } else {
            $extNameInput = new htmlTableExtendedInputField(_("Extension name"), 'AstExtension', $extension, 'AstExtension');
            $extNameInput->setRequired(true);
            $renderContainer->addElement($extNameInput, true);
        }

        $accountContext = '';
        if (isset($entries[0]['astcontext'][0])) {
            $accountContext = $entries[0]['astcontext'][0];
        }
        $accountContextInput = new htmlTableExtendedInputField(_("Extension context"), 'AstContext', $accountContext, 'AstContext');
        $accountContextInput->setRequired(true);
        $renderContainer->addElement($accountContextInput, true);


        $renderContainer->addElement(new htmlSubTitle(_('Rules')));
        $renderContainer->addElement(new htmlSpacer(null, '20px'), true);

        for ($i = 0; $i < sizeof($entries); $i++) {
            $this->render_extension($entries[$i], $i, $renderContainer);
            $renderContainer->addElement(new htmlButton("delete_rule_" . $i, _('Delete rule')), false);

            $upDownButtons = new htmlTable();
            if ($i > 0) {
                $upDownButtons->addElement(new htmlButton('rule_up_button_' . $i, 'up.gif', true), false);
            }
            if (($i < sizeof($entries) - 1) &&
                    ((sizeof($entries) > 1) || ($this->addRuleFlag) )) {
                $upDownButtons->addElement(new htmlButton('rule_down_button_' . $i, 'down.gif', true));
            }
            $renderContainer->addElement($upDownButtons, true);
        }

        $displayEntrNum = sizeof($entries);

        if ($this->addRuleFlag || sizeof($entries) == 0) {

            $this->render_extension(null, sizeof($entries), $renderContainer);
            
            if ($this->addRuleFlag) {
                $upDownButtons = new htmlTable();
                $renderContainer->addElement(new htmlButton("delete_rule_" . $i, _('Delete rule')), false);
                $upDownButtons->addElement(new htmlButton('rule_up_button_' . $i, 'up.gif', true), false);
                $renderContainer->addElement($upDownButtons, true);                
            }
            
            $displayEntrNum++;
            $this->addRuleFlag = false;
        }
        $hidenInput = new htmlHiddenInput("extension_rows", $displayEntrNum); //the size of found rows plus 1 for new one;
        $renderContainer->addElement($hidenInput, true);

        $renderContainer->addElement(new htmlButton("add_rule", _('Add another rule')), true);
    }

    function render_extension($extensLine, $placeInList, $renderContainer) {

        // application
        $application = '';
        if (isset($extensLine['astapplication'][0])) {
            $application = $extensLine['astapplication'][0];
        }
        $applicationInput = new htmlTableExtendedInputField(_("Application"), "AstApplication_" . $placeInList, $application, 'AstApplication');
        $applicationInput->setRequired(true);
        $renderContainer->addElement($applicationInput, true);
        // application data
        $applicationData = '';
        if (isset($extensLine['astapplicationdata'][0])) {
            $applicationData = $extensLine['astapplicationdata'][0];
        }
        $renderContainer->addElement(new htmlTableExtendedInputField(_("Application data"), "AstApplicationData_" . $placeInList, $applicationData, 'AstApplicationData'), true);
        //delimeter
        $renderContainer->addElement(new htmlSpacer(null, '10px'), true);
    }

    function array_sort($array, $on, $order='SORT_ASC') {
        $new_array = array();
        $sortable_array = array();

        if (count($array) > 0) {
            foreach ($array as $k => $v) {
                if (is_array($v)) {
                    foreach ($v as $k2 => $v2) {
                        if ($k2 == $on) {
                            $sortable_array[$k] = $v2;
                        }
                    }
                } else {
                    $sortable_array[$k] = $v;
                }
            }

            switch ($order) {
                case 'SORT_ASC':
                    asort($sortable_array);
                    break;
                case 'SORT_DESC':
                    arsort($sortable_array);
                    break;
            }

            foreach ($sortable_array as $k => $v) {
                $new_array[] = $array[$k];
            }
        }
        return $new_array;
    }

    /**
     * Displays a list of possible owners of this extension.
     *
     * @return htmlElement HTML meta data
     */
    function display_html_user() {
    	$return = new htmlTable();
        // load list with all potential owners
        $searchScope = 'user';
        if ($this->searchOwnersInTreeSuffix) {
            $searchScope = 'tree';
        }
        $searchClass = 'inetOrgPerson';
        if ($this->filterOwnerForAsteriskAccounts) {
            $searchClass = 'AsteriskSIPUser';
        }
        $entries = searchLDAPByAttribute(null, null, $searchClass, array('dn'), array($searchScope));
        $users_dn = array();
        for ($i = 0; $i < sizeof($entries); $i++) {
            $dn = $entries[$i]['dn'];
            if (isset($dn) && (!isset($this->extensionOwners) || !in_array($dn, $this->extensionOwners))) {
                $users_dn[getAbstractDN($dn)] = $dn;
            }
        }
        if (isset($this->extensionOwners)) {
            $memberList = $this->extensionOwners;
        } else {
            $memberList = array();
        }
        $members = array();
        for ($i = 0; $i < sizeof($memberList); $i++) {
            $members[getAbstractDN($memberList[$i])] = $memberList[$i];
        }
        // options
        $return->addElement(new htmlTableExtendedInputCheckbox('filterAsteriskUsers', $this->filterOwnerForAsteriskAccounts, _('Show only Asterisk accounts'), 'ownerOptions', false));
        $refreshButton = new htmlButton('changeFilter', _('Refresh'));
        $refreshButton->rowspan = 2;
        $return->addElement($refreshButton, true);
        $return->addElement(new htmlTableExtendedInputCheckbox('useTreeSuffix', $this->searchOwnersInTreeSuffix, _('Search tree suffix for users'), 'ownerOptions', false), true);
        $return->addElement(new htmlSpacer(null, '10px'), true);
        // owners
        $ownerContent = new htmlTable();
        $ownerContent->addElement(new htmlOutputText(_("Selected users")));
        $ownerContent->addElement(new htmlOutputText(""));
        $ownerContent->addElement(new htmlOutputText(_("Available users")));
        $ownerContent->addNewLine();
        $selectedList = new htmlSelect('removeusers', $members, null, 15);
        $selectedList->setHasDescriptiveElements(true);
        $selectedList->setMultiSelect(true);
        $selectedList->setRightToLeftTextDirection(true);
        $ownerContent->addElement($selectedList);
        $ownerButtons = new htmlTable();
        $ownerButtons->addElement(new htmlButton('addusers_button', 'back.gif', true), true);
        $ownerButtons->addElement(new htmlButton('removeusers_button', 'forward.gif', true));
        $ownerContent->addElement($ownerButtons);
        $availableList = new htmlSelect('addusers', $users_dn, null, 15);
        $availableList->setTransformSingleSelect(false);
        $availableList->setHasDescriptiveElements(true);
        $availableList->setMultiSelect(true);
        $availableList->setRightToLeftTextDirection(true);
        $ownerContent->addElement($availableList);
        $ownerContent->colspan = 4;
        $return->addElement(new htmlSubTitle(_("Extension owners")), true);
        $return->addElement($ownerContent, true);
        // back button
        $backButton = new htmlAccountPageButton(get_class($this), 'attributes', 'back', _('Ok'));
        $backButton->colspan = 3;
        $return->addElement($backButton);
        return $return;
    }

    /**
     * Processes user input of the user selection page.
     * It checks if all input values are correct and updates the associated LDAP attributes.
     *
     * @return array list of info/error messages
     */
    function process_user() {
        if (isset($_POST['changeFilter'])) {
            // update filter value
            if (isset($_POST['filterAsteriskUsers'])) {
                $this->filterOwnerForAsteriskAccounts = ($_POST['filterAsteriskUsers'] == 'on');
            } else {
                $this->filterOwnerForAsteriskAccounts = false;
            }
            // update search suffix
            if (isset($_POST['useTreeSuffix'])) {
                $this->searchOwnersInTreeSuffix = ($_POST['useTreeSuffix'] == 'on');
            } else {
                $this->searchOwnersInTreeSuffix = false;
            }
        }
        if (!isset($this->extensionOwners))
            $this->extensionOwners = array();
        if (isset($_POST['addusers']) && isset($_POST['addusers_button'])) { // Add users to list
            // Add new user
            $this->extensionOwners = @array_merge($this->extensionOwners, $_POST['addusers']);
        } elseif (isset($_POST['removeusers']) && isset($_POST['removeusers_button'])) { // remove users from list
            $this->extensionOwners = array_delete($_POST['removeusers'], $this->extensionOwners);
        }

        return array();
    }

    /*
     * Gwet list of all application for given extension and move it into given suffix
     */

    function move_extention_to_new_suffix() {
        $dn_orig_array = explode(",", $this->getAccountContainer()->dn_orig);
        $orig_suffix = implode(",", array_slice($dn_orig_array, 1, count($dn_orig_array)));
        if (strcmp($orig_suffix, $this->getAccountContainer()->dnSuffix) != 0 && !$this->getAccountContainer()->isNewAccount) {
            $is_rename_success = false;
            for ($rowCounter = 0; $rowCounter < count($this->extensionRows); $rowCounter++) {
                $row = $this->extensionRows[$rowCounter];
                $is_rename_success = ldap_rename($_SESSION['ldap']->server(), "cn=" . $row["cn"][0] . "," . $orig_suffix, "cn=" . $row["cn"][0], $this->getAccountContainer()->dnSuffix, true);
            }
        }
    }
    
    /**
     * Return true if even one owner is set and false otherwise
     */
    function isExtensionOwnerSet(){
        if(sizeof($this->extensionOwners) > 0){
            return true;
        }
        return false;
    }
    
    /**
     * Write variables into object and do some regex checks
     *
     * @param array $_POST HTTP-POST values
     */
    function process_attributes() {
        $errors = array();
        $extensionName = array();
        
        if (!isset($_POST['generate_extension_name'])) {

            //perform normal set of operations
            if (isset($_POST['AstExtension']) && $_POST['AstExtension'] != '') {
                $extensionName[0] = $_POST['AstExtension'];
            } else {
                $errors[] = $this->messages['AstExtension'][0];
            }
            $extensionContext = array();
            if (isset($_POST['AstContext'])) {
                $extensionContext[0] = $_POST['AstContext'];
                if ($extensionContext[0] == '') {
                    $errors[] = $this->messages['AstContext'][0];
                }
            }

            if ($this->getAccountContainer()->isNewAccount && isset($extensionName[0])) {
                $isPresented = $this->isThisExtensionPresented($extensionName[0]);
                if ($isPresented) {
                    $errors[] = $this->messages['AstExtension'][1];
                }
            }

            if (isset($_POST['add_rule'])) {
                $this->addRuleFlag = true;
            }
            //process fileds that are individual for each row
            $extrow_errors = $this->processExtensionRows($extensionName, $extensionContext);

            if (isset($extrow_errors) && count($extrow_errors) > 0) {

                $errors = array_merge($errors, $extrow_errors);
            }
        } else {
            //find new not taken extension name
            $this->extensionRows[0]['astextension'][0] = $this->generateNextExtensionName();
        }

        return $errors;
    }

    function processExtensionRows($extensionName, $extensionContext) {
        $errors = array();
        if (isset($_POST['extension_rows']) && get_preg($_POST['extension_rows'], 'digit')) {
            
            $extensionPriorityCntr = 1;
            $this->extensionRows = array();
            for ($entryCounter = 0; $entryCounter < $_POST['extension_rows']; $entryCounter++) {
                $extRow = array();
                if (!isset($_POST['delete_rule_' . $entryCounter])) {

                    $singleExtAddErrors = $this->processSingleExtension($extRow,$extensionName, $extensionContext, $entryCounter,$extensionPriorityCntr);
                    $errors = $errors + $singleExtAddErrors;
                    
                    if ((isset($extRow['astapplication'][0]) && $extRow['astapplication'][0] != "") ||
                            (isset($extRow['astapplicationdata'][0]) && $extRow['astapplicationdata'][0] != "")
                    ) {
                        $this->extensionRows[$extensionPriorityCntr - 1] = $extRow;
                        $extensionPriorityCntr++;
                    }
                }
            }
            
            //trow error banner if last row unporpertly filled (for now the only reason for that is unfilled AstApplication filed)
            if (isset($_POST['AstApplicationData_' . ($_POST['extension_rows'] - 1)]) && $_POST['AstApplicationData_' . ($_POST['extension_rows'] - 1)] != "" &&
                    ($_POST['AstApplication_' . ($_POST['extension_rows'] - 1)] == "" || !isset($_POST['AstApplication_' . ($_POST['extension_rows'] - 1)]))) {
                $errors[] = $this->messages['AstApplication'][0];
            }
            
            //process priority change on rule
            $this->processPriorityChange();
            
            //finally sort extensions by priority
            $this->extensionRows = $this->array_sort($this->extensionRows, 'astpriority');
        }

        return $errors;
    }
    
    /*
     * Set extension owner as current logged in user.
     */
    function setDefaultExtensionOwner(){
        $credentials = $_SESSION['ldap']->decrypt_login();
	$login = $credentials[0];
        $this->extensionOwners[0] = $login;
    }

    /*
     * Fill fileds of single extension row
     * In Asterisk it would only be an extension name,a priority,an application, but LDAP spicific 
     * add to processing context filed.
     * @param $extRow - hash array to store single extension properties;
     * @param $entryCounter - counter to distinguish single extensuion properties from $_POST
     * @param $extensionPriorityCntr - it is the variable where actual number of extension rules wuld be aggregated 
     */

    function processSingleExtension(&$extRow,$extensionName, $extensionContext ,$entryCounter,$extensionPriorityCntr) {
        $errors = array();
        if (isset($extensionContext[0])) {
            $extRow['astcontext'][0] = $extensionContext[0];
        }
        if (isset($extensionName[0])) {
            $extRow['astextension'][0] = $extensionName[0];
        }

        $extRow["objectclass"][0] = "top";
        $extRow["objectclass"][1] = "groupOfNames";
        $extRow["objectclass"][2] = "AsteriskExtension";

        $extRow['astapplication'][0] = $_POST['AstApplication_' . $entryCounter];
        if (!isset($_POST['AstApplication_' . $entryCounter]) || $_POST['AstApplication_' . $entryCounter] == '') {
            if ($entryCounter < ($_POST['extension_rows'] - 1)) {
                $errors[] = $this->messages['AstApplication'][0];
            }
        }

        $extRow['astpriority'][0] = $extensionPriorityCntr;

        $extRow['cn'][0] = $extRow['astextension'][0] . "-" . $extRow['astpriority'][0];

        if (isset($_POST['AstApplicationData_' . $entryCounter]) && $_POST['AstApplicationData_' . $entryCounter] != "") {
            $extRow['astapplicationdata'][0] = $_POST['AstApplicationData_' . $entryCounter];
        }

        //Fille the member filed        
        $extRow['member'] = $this->extensionOwners;
        if (!isset($extRow['member']) || count($extRow['member']) == 0) {
            if (!isset($_POST['form_subpage_' . get_class($this) . '_user_open'])) {
                $errors[] = $this->messages['member'][0];
            }
        } 
        return $errors;
    }

    function processPriorityChange() {
        for ($entryCounter = 0; $entryCounter < sizeof($this->extensionRows); $entryCounter++) {
            if (isset($_POST["rule_up_button_" . $entryCounter])) {

                $this->extensionRows[$entryCounter]['astpriority'][0]--;
                $this->extensionRows[$entryCounter - 1]['astpriority'][0]++;
            } else if (isset($_POST["rule_down_button_" . $entryCounter])) {
                $this->extensionRows[$entryCounter]['astpriority'][0]++;
                $this->extensionRows[$entryCounter + 1]['astpriority'][0]--;
            }
        }
    }

    /*
     * Search by extension name and retun true if fileds wtith this extension name is presented
     * and false otherwise.
     * 
     */

    function isThisExtensionPresented($extension) {
        $searchClass = "AsteriskExtension";
        $searchScope = 'asteriskExtNewUI';

        $entries = searchLDAPByAttribute("AstExtension", $extension, $searchClass, array('dn'), array($searchScope));

        $isPresented = false;
        if (count($entries) > 0) {
            $isPresented = true;
        }

        return $isPresented;
    }

    /*
     * This function search in in the base subtree and find all extensions names within.
     * The generation algorithm is the naive one, so only work when extension is numbers.
     * All extension name is sorted and new extension name will be greates on + 1.
     */

    function generateNextExtensionName() {
        $searchClass = "AsteriskExtension";
        $searchScope = 'asteriskExtNewUI';
        
        $suggeted_extension = ''; //default empty value
        if( isset($this->extensionRows[0]['astextension'][0]) ){
            $suggeted_extension = $this->extensionRows[0]['astextension'][0];
        }else{
            $entries = searchLDAPByAttribute(null, null, $searchClass, array('astextension'), array($searchScope));
            $entries = $this->array_sort($entries, 'astextension');

            if (isset($entries[sizeof($entries) - 1]['astextension'][0])) {
                $greater_ext_name = $entries[sizeof($entries) - 1]['astextension'][0];
            } else {
                $greater_ext_name = 0;
            }
            if(is_numeric($greater_ext_name)){
                $suggeted_extension = $greater_ext_name + 1;
            }else{
                $ptn = "/(?P<name>[A-Za-z0-9]+)_(?P<digit>\d+)/";
                if(preg_match_all($ptn, $greater_ext_name, $matches, PREG_PATTERN_ORDER)){
                    $next_digit = $matches['digit'][0] + 1;
                    $suggeted_extension = $matches['name'][0] . '_' . $next_digit;
                }else{
                    $suggeted_extension = $greater_ext_name . '_1';
                }
            }
        }
        
        return $suggeted_extension;
    }

    /**
     * Returns a list of PDF entries
     */
    function get_pdfEntries() {
        $return = array();
        $extName = '';
        if (isset($this->attributes['AstExtension'][0])) {
            $extName = $this->attributes['AstExtension'][0];
        }
        if (isset($this->extensionRows[0]['astextension'][0])) {
            $extName = $this->extensionRows[0]['astextension'][0];
        }
        // global values
        if (isset($this->attributes['AstContext'])) {
            $return[get_class($this) . '_AstContext'] = array('<block><key>' . _('Account context') . '</key><value>' . $this->attributes['AstContext'][0] . '</value></block>');
        }
        if (isset($this->attributes['AstExtension'])) {
            $return[get_class($this) . '_AstExtension'] = array('<block><key>' . _('Extension name') . '</key><value>' . $this->attributes['AstExtension'][0] . '</value></block>');
        }
        if (isset($this->attributes['member'])) {
            $return[get_class($this) . '_member'] = array('<block><key>' . _('Extension owners') . '</key><value>' . implode('; ', $this->attributes['member']) . '</value></block>');
        }
        if (isset($this->attributes['cn'])) {
            $return[get_class($this) . '_cn'] = array('<block><key>' . _('Common name') . '</key><value>' . $this->attributes['cn'][0] . '</value></block>');
        }
        // rules
        $entries = $this->load_extension_parts($extName);
        $rulePDF = array();
        $rulePDF[] = '<block><tr><td width="80%"> </td></tr></block>';
        $rulePDF[] = '<block><tr><td width="80%"> </td></tr></block>';
        $rulePDF[] = '<block><tr><td width="80%"> </td></tr></block>';
        $rulePDF[] = '<block><tr>' .
                '<td width="20%"><b>' . _('Name') . '</b></td>' .
                '<td width="30%"><b>' . _('Application') . '</b></td>' .
                '<td width="30%"><b>' . _('Application data') . '</b></td>' .
                '<td width="20%"><b>' . _('Priority') . '</b></td>' .
                '</tr></block>';
        for ($i = 0; $i < sizeof($entries); $i++) {
            $appdata = '';
            if (isset($entries[$i]['astapplicationdata'][0])) {
                $appdata = $entries[$i]['astapplicationdata'][0];
            }
            $rulePDF[] = '<block><tr>' .
                    '<td width="20%" align=\"L\">' . $entries[$i]['cn'][0] . '</td>' .
                    '<td width="30%" align=\"L\">' . $entries[$i]['astapplication'][0] . '</td>' .
                    '<td width="30%" align=\"L\">' . $appdata . '</td>' .
                    '<td width="20%" align=\"L\">' . $entries[$i]['astpriority'][0] . '</td></tr></block>';
        }
        $return[get_class($this) . '_rules'] = $rulePDF;
        return $return;
    }

    /**
     * In this function the LDAP account is built up.
     *
     * @param array $rawAccounts list of hash arrays (name => value) from user input
     * @param array $partialAccounts list of hash arrays (name => value) which are later added to LDAP
     * @param array $ids list of IDs for column position (e.g. "posixAccount_uid" => 5)
     * @param array $selectedModules list of selected account modules
     * @return array list of error messages if any
     */
    function build_uploadAccounts($rawAccounts, $ids, &$partialAccounts, $selectedModules) {
        $messages = array();
        for ($i = 0; $i < sizeof($rawAccounts); $i++) {
            // add object class
            if (!in_array("AsteriskExtension", $partialAccounts[$i]['objectClass']))
                $partialAccounts[$i]['objectClass'][] = "AsteriskExtension";
            if (!in_array("groupOfNames", $partialAccounts[$i]['objectClass']))
                $partialAccounts[$i]['objectClass'][] = "groupOfNames";
            // attributes
            $partialAccounts[$i]['cn'] = $rawAccounts[$i][$ids['asteriskExtension_cn']];
            $partialAccounts[$i]['AstExtension'] = $rawAccounts[$i][$ids['asteriskExtension_AstExtension']];
            $partialAccounts[$i]['AstPriority'] = $rawAccounts[$i][$ids['asteriskExtension_AstPriority']];
            $partialAccounts[$i]['member'] = explode(';', $rawAccounts[$i][$ids['asteriskExtension_member']]);
            if ($rawAccounts[$i][$ids['asteriskExtension_AstApplication']] != "") {
                $partialAccounts[$i]['AstApplication'] = $rawAccounts[$i][$ids['asteriskExtension_AstApplication']];
            }
            if ($rawAccounts[$i][$ids['asteriskExtension_AstApplicationData']] != "") {
                $partialAccounts[$i]['AstApplicationData'] = $rawAccounts[$i][$ids['asteriskExtension_AstApplicationData']];
            }
            if ($rawAccounts[$i][$ids['asteriskExtension_AstContext']] != "") {
                $partialAccounts[$i]['AstContext'] = $rawAccounts[$i][$ids['asteriskExtension_AstContext']];
            }
        }
        return $messages;
    }

    //public

    function save_attributes() {

        $this->extensionRows = $this->array_sort($this->extensionRows, 'astpriority');

        $this->move_extention_to_new_suffix(); //Muve extension to new suffix if necessary
        //Modify existent config roes if necessary
        for ($rowCounter = 0; $rowCounter < count($this->extensionRowsOrig); $rowCounter++) {
            $rowOrig = $this->extensionRowsOrig[$rowCounter];
            unset($rowOrig['dn']);
            if ($rowCounter <= count($this->extensionRows)) {
                $row = $this->extensionRows[$rowCounter];

                if (count($diffVals = array_diff_key($rowOrig, $row)) != 0) {
                    ldap_mod_del($_SESSION['ldap']->server(), "cn=" . $row["cn"][0] . "," . $this->getAccountContainer()->dnSuffix, $diffVals);
                }
                if (count($diffVals = array_diff_key($row, $rowOrig)) != 0) {
                    ldap_mod_add($_SESSION['ldap']->server(), "cn=" . $row["cn"][0] . "," . $this->getAccountContainer()->dnSuffix, $diffVals);
                }
                $diffValsSerialysed = array_diff(array_map("serialize", array_intersect_key($row, $rowOrig)), array_map("serialize", $rowOrig));
                if (count($diffValsSerialysed) != 0) {
                    $diffVals = array_map("unserialize", $diffValsSerialysed);
                    ldap_mod_replace($_SESSION['ldap']->server(), "cn=" . $row["cn"][0] . "," . $this->getAccountContainer()->dnSuffix, $diffVals);
                }
            } else {
                ldap_delete($_SESSION['ldap']->server(), "cn=" . $rowOrig["cn"][0] . "," . $_SESSION['config']->get_Suffix('asteriskExtNewUI'));
            }
        }
        //Add new config rows
        for ($rowCounter = count($this->extensionRowsOrig); $rowCounter < count($this->extensionRows); $rowCounter++) {
            $row = $this->extensionRows[$rowCounter];
            ldap_add($_SESSION['ldap']->server(), "cn=" . $row["cn"][0] . "," . $this->getAccountContainer()->dnSuffix, $row);
        }
        return $this->getAccountContainer()->save_module_attributes($this->orig, $this->orig);
    }

    /**
     * Runs ufter main deltete procedure was done and do postmorten for other parts of extension
     * wtith priority > 1
     * @return type 
     */
    function postDeleteActions() {

        $extension = $this->attributes['AstExtension'][0];
        $searchClass = "AsteriskExtension";
        $searchScope = 'asteriskExtNewUI';
        $entries = searchLDAPByAttribute("AstExtension", $extension, $searchClass, array('cn', 'AstContext', 'AstPriority',
            'AstApplication', 'AstApplicationData', 'AstExtension', 'member', 'ObjectClass', 'dn'), array($searchScope));
        $entries = $this->array_sort($entries, 'astpriority');

        for ($rowCounter = 0; $rowCounter < count($entries); $rowCounter++) {
            $rowOrig = $entries[$rowCounter];
            if ($rowOrig["astpriority"][0] > 1) {                
                ldap_delete($_SESSION['ldap']->server(), $rowOrig['dn']);                  
            }
        }
        $message = array(0 => array("ERROR"));
        return array();
    }

}

?>