root/modules/branches/2.10/callforward/functions.inc.php

<?php
if (!defined('FREEPBX_IS_AUTH')) { die('No direct script access allowed'); }
//This file is part of FreePBX.
//
//    FreePBX 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.
//
//    FreePBX 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 FreePBX.  If not, see <http://www.gnu.org/licenses/>.
//
// Copyright (C) 2005 qldrob
function callforward_get_config($engine) {
  $modulename = 'callforward';
  
  // This generates the dialplan
  global $ext;  
  global $amp_conf;  
  global $version;
  switch($engine) {
    case "asterisk":
      // If Using CF then set this so AGI scripts can determine
      //
      if ($amp_conf['USEDEVSTATE']) {
        $ext->addGlobal('CFDEVSTATE','TRUE');
      }
      if (is_array($featurelist = featurecodes_getModuleFeatures($modulename))) {
        foreach($featurelist as $item) {
          $featurename = $item['featurename'];
          $fname = $modulename.'_'.$featurename;
          if (function_exists($fname)) {
            $fcc = new featurecode($modulename, $featurename);
            $fc = $fcc->getCodeActive();
            unset($fcc);
            
            if ($fc != '')
              $fname($fc);
          } else {
            $ext->add('from-internal-additional', 'debug', '', new ext_noop($modulename.": No func $fname"));
            var_dump($item);
          } 
        }
      }

      // Create hints context for CF codes so a device can subscribe to the DND state
      //
      $fcc = new featurecode($modulename, 'cf_toggle');
      $cf_code = $fcc->getCodeActive();
      unset($fcc);

      if ($amp_conf['USEDEVSTATE'] && $cf_code != '') {
        $ext->addInclude('from-internal-additional','ext-cf-hints');
        $contextname = 'ext-cf-hints';
        $device_list = core_devices_list("all", 'full', true);
        $base_offset = strlen($cf_code);
        foreach ($device_list as $device) {
          if ($device['tech'] == 'sip' || $device['tech'] == 'iax2') {
            $offset = $base_offset + strlen($device['id']);
            $ext->add($contextname, $cf_code.$device['id'], '', new ext_goto("1",$cf_code,"app-cf-toggle"));
            $ext->add($contextname, '_'.$cf_code.$device['id'].'.', '', new ext_set("toext",'${EXTEN:'.$offset.'}'));
            $ext->add($contextname, '_'.$cf_code.$device['id'].'.', '', new ext_goto("setdirect",$cf_code,"app-cf-toggle"));
            $ext->addHint($contextname, $cf_code.$device['id'], "Custom:DEVCF".$device['id']);
          }
        }
      }

    break;
  }
}

// Unconditional Call Forwarding Toggle
function callforward_cf_toggle($c) {
  global $ext;
  global $amp_conf;
  global $version;
  $ast_ge_16 = version_compare($version, "1.6", "ge");

  $id = "app-cf-toggle"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  $ext->add($id, $c, '', new ext_answer(''));
  $ext->add($id, $c, '', new ext_wait('1'));
  $ext->add($id, $c, '', new ext_macro('user-callerid'));
  $ext->add($id, $c, '', new ext_setvar('fromext', '${AMPUSER}'));

  $ext->add($id, $c, '', new ext_gotoif('$["${DB(CF/${fromext})}" = ""]', 'activate', 'deactivate'));

  if ($ast_ge_16) {
    $ext->add($id, $c, 'activate', new ext_read('toext', 'ent-target-attendant&then-press-pound'));
  } else {
    $ext->add($id, $c, 'activate', new ext_playback('ent-target-attendant'));
    $ext->add($id, $c, '', new ext_read('toext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_gotoif('$["${toext}"=""]', 'activate'));
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, 'toext', new ext_setvar('DB(CF/${fromext})', '${toext}')); 
  if ($amp_conf['USEDEVSTATE']) {
    $ext->add($id, $c, '', new ext_setvar('STATE', 'BUSY'));
    $ext->add($id, $c, '', new ext_gosub('1', 'sstate', $id));
  }
  if ($amp_conf['FCBEEPONLY']) {
    $ext->add($id, $c, 'hook_on', new ext_playback('beep')); // $cmd,n,Playback(...)
  } else {
    $ext->add($id, $c, 'hook_on', new ext_playback('call-fwd-unconditional&for&extension'));
    $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
    $ext->add($id, $c, '', new ext_playback('is-set-to'));
    $ext->add($id, $c, '', new ext_saydigits('${toext}'));
  }
  $ext->add($id, $c, '', new ext_macro('hangupcall'));
  $ext->add($id, $c, 'setdirect', new ext_answer(''));
  $ext->add($id, $c, '', new ext_wait('1'));
  $ext->add($id, $c, '', new ext_macro('user-callerid'));
  $ext->add($id, $c, '', new ext_goto('toext'));

  $ext->add($id, $c, 'deactivate', new ext_dbdel('CF/${fromext}')); 
  if ($amp_conf['USEDEVSTATE']) {
    $ext->add($id, $c, '', new ext_setvar('STATE', 'NOT_INUSE'));
    $ext->add($id, $c, '', new ext_gosub('1', 'sstate', $id));
  }
  if ($amp_conf['FCBEEPONLY']) {
    $ext->add($id, $c, 'hook_off', new ext_playback('beep')); // $cmd,n,Playback(...)
  } else {
    $ext->add($id, $c, 'hook_off', new ext_playback('call-fwd-unconditional&de-activated')); // $cmd,n,Playback(...)
  }
  $ext->add($id, $c, '', new ext_macro('hangupcall'));

  if ($amp_conf['USEDEVSTATE']) {
    $c = 'sstate';
    $ext->add($id, $c, '', new ext_setvar($amp_conf['AST_FUNC_DEVICE_STATE'].'(Custom:CF${fromext})', '${STATE}'));
    $ext->add($id, $c, '', new ext_dbget('DEVICES','AMPUSER/${fromext}/device'));
    $ext->add($id, $c, '', new ext_gotoif('$["${DEVICES}" = "" ]', 'return'));
    $ext->add($id, $c, '', new ext_setvar('LOOPCNT', '${FIELDQTY(DEVICES,&)}'));
    $ext->add($id, $c, '', new ext_setvar('ITER', '1'));
    $ext->add($id, $c, 'begin', new ext_setvar($amp_conf['AST_FUNC_DEVICE_STATE'].'(Custom:DEVCF${CUT(DEVICES,&,${ITER})})','${STATE}'));
    $ext->add($id, $c, '', new ext_setvar('ITER', '$[${ITER} + 1]'));
    $ext->add($id, $c, '', new ext_gotoif('$[${ITER} <= ${LOOPCNT}]', 'begin'));
    $ext->add($id, $c, 'return', new ext_return());
  }
}

// Unconditional Call Forwarding
function callforward_cfon($c) {
  global $ext;
  global $amp_conf;
  global $version;
  $ast_ge_16 = version_compare($version, "1.6", "ge");

  $id = "app-cf-on"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)

  if ($ast_ge_16) {
    $ext->add($id, $c, '', new ext_read('fromext', 'call-fwd-unconditional&please-enter-your&extension&then-press-pound'));
  } else {
    $ext->add($id, $c, '', new ext_playback('call-fwd-unconditional'));
    $ext->add($id, $c, '', new ext_playback('please-enter-your&extension'));
    $ext->add($id, $c, '', new ext_read('fromext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_setvar('fromext', '${IF($["foo${fromext}"="foo"]?${AMPUSER}:${fromext})}')); 
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)

  if ($ast_ge_16) {
    $ext->add($id, $c, 'startread', new ext_read('toext', 'ent-target-attendant&then-press-pound'));
  } else {
    $ext->add($id, $c, 'startread', new ext_playback('ent-target-attendant'));
    $ext->add($id, $c, '', new ext_read('toext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_gotoif('$["foo${toext}"="foo"]', 'startread'));
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_setvar('DB(CF/${fromext})', '${toext}')); 
  if ($amp_conf['USEDEVSTATE']) {
    $ext->add($id, $c, '', new ext_setvar('STATE', 'BUSY'));
    $ext->add($id, $c, '', new ext_gosub('1', 'sstate', $id));
  }
  if ($amp_conf['FCBEEPONLY']) {
    $ext->add($id, $c, 'hook_1', new ext_playback('beep')); // $cmd,n,Playback(...)
  } else {
    $ext->add($id, $c, 'hook_1', new ext_playback('call-fwd-unconditional&for&extension'));
    $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
    $ext->add($id, $c, '', new ext_playback('is-set-to'));
    $ext->add($id, $c, '', new ext_saydigits('${toext}'));
  }
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  $clen = strlen($c);
  $c = "_$c.";
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${AMPUSER}'));
  $ext->add($id, $c, '', new ext_setvar('toext', '${EXTEN:'.$clen.'}'));
  $ext->add($id, $c, '', new ext_setvar('DB(CF/${fromext})', '${toext}')); 
  if ($amp_conf['USEDEVSTATE']) {
    $ext->add($id, $c, '', new ext_setvar('STATE', 'BUSY'));
    $ext->add($id, $c, '', new ext_gosub('1', 'sstate', $id));
  }
  if ($amp_conf['FCBEEPONLY']) {
    $ext->add($id, $c, 'hook_2', new ext_playback('beep')); // $cmd,n,Playback(...)
  } else {
    $ext->add($id, $c, 'hook_2', new ext_playback('call-fwd-unconditional&for&extension'));
    $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
    $ext->add($id, $c, '', new ext_playback('is-set-to'));
    $ext->add($id, $c, '', new ext_saydigits('${toext}'));
  }
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  if ($amp_conf['USEDEVSTATE']) {
    $c = 'sstate';
    $ext->add($id, $c, '', new ext_setvar($amp_conf['AST_FUNC_DEVICE_STATE'].'(Custom:CF${fromext})', '${STATE}'));
    $ext->add($id, $c, '', new ext_dbget('DEVICES','AMPUSER/${fromext}/device'));
    $ext->add($id, $c, '', new ext_gotoif('$["${DEVICES}" = "" ]', 'return'));
    $ext->add($id, $c, '', new ext_setvar('LOOPCNT', '${FIELDQTY(DEVICES,&)}'));
    $ext->add($id, $c, '', new ext_setvar('ITER', '1'));
    $ext->add($id, $c, 'begin', new ext_setvar($amp_conf['AST_FUNC_DEVICE_STATE'].'(Custom:DEVCF${CUT(DEVICES,&,${ITER})})','${STATE}'));
    $ext->add($id, $c, '', new ext_setvar('ITER', '$[${ITER} + 1]'));
    $ext->add($id, $c, '', new ext_gotoif('$[${ITER} <= ${LOOPCNT}]', 'begin'));
    $ext->add($id, $c, 'return', new ext_return());
  }
}

function callforward_cfoff_any($c) {
  global $ext;
  global $amp_conf;
  global $version;
  $ast_ge_16 = version_compare($version, "1.6", "ge");

  $id = "app-cf-off-any"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)

  if ($ast_ge_16) {
    $ext->add($id, $c, '', new ext_read('fromext', 'please-enter-your&extension&then-press-pound'));
  } else {
    $ext->add($id, $c, '', new ext_playback('please-enter-your&extension'));
    $ext->add($id, $c, '', new ext_read('fromext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_setvar('fromext', '${IF($["foo${fromext}"="foo"]?${AMPUSER}:${fromext})}')); 
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_dbdel('CF/${fromext}')); 
  if ($amp_conf['USEDEVSTATE']) {
    $ext->add($id, $c, '', new ext_setvar('STATE', 'NOT_INUSE'));
    $ext->add($id, $c, '', new ext_gosub('1', 'sstate', $id));
  }
  $ext->add($id, $c, 'hook_1', new ext_playback('call-fwd-unconditional&for&extension'));
  $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
  $ext->add($id, $c, '', new ext_playback('cancelled'));
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  if ($amp_conf['USEDEVSTATE']) {
    $c = 'sstate';
    $ext->add($id, $c, '', new ext_setvar($amp_conf['AST_FUNC_DEVICE_STATE'].'(Custom:CF${fromext})', '${STATE}'));
    $ext->add($id, $c, '', new ext_dbget('DEVICES','AMPUSER/${fromext}/device'));
    $ext->add($id, $c, '', new ext_gotoif('$["${DEVICES}" = "" ]', 'return'));
    $ext->add($id, $c, '', new ext_setvar('LOOPCNT', '${FIELDQTY(DEVICES,&)}'));
    $ext->add($id, $c, '', new ext_setvar('ITER', '1'));
    $ext->add($id, $c, 'begin', new ext_setvar($amp_conf['AST_FUNC_DEVICE_STATE'].'(Custom:DEVCF${CUT(DEVICES,&,${ITER})})','${STATE}'));
    $ext->add($id, $c, '', new ext_setvar('ITER', '$[${ITER} + 1]'));
    $ext->add($id, $c, '', new ext_gotoif('$[${ITER} <= ${LOOPCNT}]', 'begin'));
    $ext->add($id, $c, 'return', new ext_return());
  }
}

function callforward_cfoff($c) {
  global $ext;
  global $amp_conf;

  $id = "app-cf-off"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  // for this extension
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${AMPUSER}'));
  $ext->add($id, $c, '', new ext_dbdel('CF/${fromext}')); 
  if ($amp_conf['USEDEVSTATE']) {
    $ext->add($id, $c, '', new ext_setvar('STATE', 'NOT_INUSE'));
    $ext->add($id, $c, '', new ext_gosub('1', 'sstate', $id));
  }
  if ($amp_conf['FCBEEPONLY']) {
    $ext->add($id, $c, 'hook_1', new ext_playback('beep')); // $cmd,n,Playback(...)
  } else {
    $ext->add($id, $c, 'hook_1', new ext_playback('call-fwd-unconditional&de-activated')); // $cmd,n,Playback(...)
  }
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  // for any extension, dial *XX<exten>
  $clen = strlen($c);
  $c = "_$c.";
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${EXTEN:'.$clen.'}'));
  $ext->add($id, $c, '', new ext_dbdel('CF/${fromext}')); 
  if ($amp_conf['USEDEVSTATE']) {
    $ext->add($id, $c, '', new ext_setvar('STATE', 'NOT_INUSE'));
    $ext->add($id, $c, '', new ext_gosub('1', 'sstate', $id));
  }
  if ($amp_conf['FCBEEPONLY']) {
    $ext->add($id, $c, 'hook_2', new ext_playback('beep')); // $cmd,n,Playback(...)
  } else {
    $ext->add($id, $c, 'hook_2', new ext_playback('call-fwd-unconditional&for&extension'));
    $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
    $ext->add($id, $c, '', new ext_playback('cancelled'));
  }
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  if ($amp_conf['USEDEVSTATE']) {
    $c = 'sstate';
    $ext->add($id, $c, '', new ext_setvar($amp_conf['AST_FUNC_DEVICE_STATE'].'(Custom:CF${fromext})', '${STATE}'));
    $ext->add($id, $c, '', new ext_dbget('DEVICES','AMPUSER/${fromext}/device'));
    $ext->add($id, $c, '', new ext_gotoif('$["${DEVICES}" = "" ]', 'return'));
    $ext->add($id, $c, '', new ext_setvar('LOOPCNT', '${FIELDQTY(DEVICES,&)}'));
    $ext->add($id, $c, '', new ext_setvar('ITER', '1'));
    $ext->add($id, $c, 'begin', new ext_setvar($amp_conf['AST_FUNC_DEVICE_STATE'].'(Custom:DEVCF${CUT(DEVICES,&,${ITER})})','${STATE}'));
    $ext->add($id, $c, '', new ext_setvar('ITER', '$[${ITER} + 1]'));
    $ext->add($id, $c, '', new ext_gotoif('$[${ITER} <= ${LOOPCNT}]', 'begin'));
    $ext->add($id, $c, 'return', new ext_return());
  }
}

// Call Forward on Busy
function callforward_cfbon($c) {
  global $ext;
  global $version;
  global $amp_conf;
  $ast_ge_16 = version_compare($version, "1.6", "ge");

  $id = "app-cf-busy-on"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  if ($ast_ge_16) {
    $ext->add($id, $c, '', new ext_read('fromext', 'call-fwd-on-busy&please-enter-your&extension&then-press-pound'));
  } else {
    $ext->add($id, $c, '', new ext_playback('call-fwd-on-busy'));
    $ext->add($id, $c, '', new ext_playback('please-enter-your&extension'));
    $ext->add($id, $c, '', new ext_read('fromext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_setvar('fromext', '${IF($["foo${fromext}"="foo"]?${AMPUSER}:${fromext})}')); 
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  if ($ast_ge_16) {
    $ext->add($id, $c, 'startread', new ext_read('toext', 'ent-target-attendant&then-press-pound'));
  } else {
    $ext->add($id, $c, 'startread', new ext_playback('ent-target-attendant'));
    $ext->add($id, $c, '', new ext_read('toext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_gotoif('$["foo${toext}"="foo"]', 'startread'));
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_setvar('DB(CFB/${fromext})', '${toext}')); 
  $ext->add($id, $c, 'hook_1', new ext_playback('call-fwd-on-busy&for&extension'));
  $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
  $ext->add($id, $c, '', new ext_playback('is-set-to'));
  $ext->add($id, $c, '', new ext_saydigits('${toext}'));
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  $clen = strlen($c);
  $c = "_$c.";
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${AMPUSER}'));
  $ext->add($id, $c, '', new ext_setvar('toext', '${EXTEN:'.$clen.'}'));
  $ext->add($id, $c, '', new ext_setvar('DB(CFB/${fromext})', '${toext}')); 
  $ext->add($id, $c, 'hook_2', new ext_playback('call-fwd-on-busy&for&extension'));
  $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
  $ext->add($id, $c, '', new ext_playback('is-set-to'));
  $ext->add($id, $c, '', new ext_saydigits('${toext}'));
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)
}

function callforward_cfboff_any($c) {
  global $ext;
  global $version;
  global $amp_conf;
  $ast_ge_16 = version_compare($version, "1.6", "ge");

  $id = "app-cf-busy-off-any"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  if ($ast_ge_16) {
    $ext->add($id, $c, '', new ext_read('fromext', 'please-enter-your&extension&then-press-pound'));
  } else {
    $ext->add($id, $c, '', new ext_playback('please-enter-your&extension'));
    $ext->add($id, $c, '', new ext_read('fromext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_setvar('fromext', '${IF($["foo${fromext}"="foo"]?${AMPUSER}:${fromext})}')); 
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_dbdel('CFB/${fromext}')); 
  $ext->add($id, $c, 'hook_1', new ext_playback('call-fwd-on-busy&for&extension'));
  $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
  $ext->add($id, $c, '', new ext_playback('cancelled'));
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)
}

function callforward_cfboff($c) {
  global $ext;
  global $amp_conf;

  $id = "app-cf-busy-off"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  // for this extension
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${AMPUSER}'));
  $ext->add($id, $c, '', new ext_dbdel('CFB/${fromext}'));
  $ext->add($id, $c, 'hook_1', new ext_playback('call-fwd-on-busy&de-activated')); // $cmd,n,Playback(...)
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  // for any extension, dial *XX<exten>
  $clen = strlen($c);
  $c = "_$c.";
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${EXTEN:'.$clen.'}'));
  $ext->add($id, $c, '', new ext_dbdel('CFB/${fromext}')); 
  $ext->add($id, $c, 'hook_2', new ext_playback('call-fwd-on-busy&for&extension'));
  $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
  $ext->add($id, $c, '', new ext_playback('cancelled'));
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)
  
}

// Call Forward on No Answer/Unavailable (i.e. phone not registered)
function callforward_cfuon($c) {
  global $ext;
  global $version;
  global $amp_conf;
  $ast_ge_16 = version_compare($version, "1.6", "ge");

  $id = "app-cf-unavailable-on"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  // prompt for extension
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  if ($ast_ge_16) {
    $ext->add($id, $c, '', new ext_read('fromext', 'call-fwd-no-ans&please-enter-your&extension&then-press-pound'));
  } else {
    $ext->add($id, $c, '', new ext_playback('call-fwd-no-ans'));
    $ext->add($id, $c, '', new ext_playback('please-enter-your&extension'));
    $ext->add($id, $c, '', new ext_read('fromext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_setvar('fromext', '${IF($["foo${fromext}"="foo"]?${AMPUSER}:${fromext})}'));
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  if ($ast_ge_16) {
    $ext->add($id, $c, 'startread', new ext_read('toext', 'ent-target-attendant&then-press-pound'));
  } else {
    $ext->add($id, $c, 'startread', new ext_playback('ent-target-attendant'));
    $ext->add($id, $c, '', new ext_read('toext', 'then-press-pound'));
  }
  $ext->add($id, $c, '', new ext_gotoif('$["foo${toext}"="foo"]', 'startread'));
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_setvar('DB(CFU/${fromext})', '${toext}')); 
  $ext->add($id, $c, 'hook_1', new ext_playback('call-fwd-no-ans&for&extension'));
  $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
  $ext->add($id, $c, '', new ext_playback('is-set-to'));
  $ext->add($id, $c, '', new ext_saydigits('${toext}'));
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  // assume this extension and forward to number after the feature code
  $clen = strlen($c);
  $c = "_$c.";
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${AMPUSER}'));
  $ext->add($id, $c, '', new ext_setvar('toext', '${EXTEN:'.$clen.'}'));
  $ext->add($id, $c, '', new ext_setvar('DB(CFU/${fromext})', '${toext}'));
  $ext->add($id, $c, 'hook_2', new ext_playback('call-fwd-no-ans&for&extension'));
  $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
  $ext->add($id, $c, '', new ext_playback('is-set-to'));
  $ext->add($id, $c, '', new ext_saydigits('${toext}'));
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)
}

function callforward_cfuoff($c) {
  global $ext;
  global $amp_conf;

  $id = "app-cf-unavailable-off"; // The context to be included

  $ext->addInclude('from-internal-additional', $id); // Add the include from from-internal

  // for this extension
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_macro('user-callerid')); // $cmd,n,Macro(user-callerid)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${AMPUSER}'));
  $ext->add($id, $c, '', new ext_dbdel('CFU/${fromext}'));
  $ext->add($id, $c, 'hook_1', new ext_playback('call-fwd-no-ans&de-activated')); // $cmd,n,Playback(...)
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)

  // for any extension, dial *XX<exten>
  $clen = strlen($c);
  $c = "_$c.";
  $ext->add($id, $c, '', new ext_answer('')); // $cmd,1,Answer
  $ext->add($id, $c, '', new ext_wait('1')); // $cmd,n,Wait(1)
  $ext->add($id, $c, '', new ext_setvar('fromext', '${EXTEN:'.$clen.'}'));
  $ext->add($id, $c, '', new ext_dbdel('CFU/${fromext}')); 
  $ext->add($id, $c, 'hook_2', new ext_playback('call-fwd-no-ans&for&extension'));
  $ext->add($id, $c, '', new ext_saydigits('${fromext}'));
  $ext->add($id, $c, '', new ext_playback('cancelled'));
  $ext->add($id, $c, '', new ext_macro('hangupcall')); // $cmd,n,Macro(user-callerid)
}

function callforward_get_extension($extension = '') {
  global $astman;
  
  $cf_type = array('CF','CFU','CFB');
  $users = array();
  
        foreach ($cf_type as $value) {
    if ($extension) {
      $users[$value] = $astman->database_get($value, $extension);
    } else {
                        $users[] = $astman->database_show($value);
    }
  }
        
  return $users;
}

function callforward_get_number($extension = '', $type = 'CF') {
  global $astman;

   switch ($type) {
                case 'CFU':
                        $cf_type = 'CFU';
                break;
                case 'CFB':
                        $cf_type = 'CFB';
                break;
                case 'CF':
                default:
            $cf_type = 'CF';
    break;
        }
  
  $number = $astman->database_get($cf_type, $extension);
  if (is_numeric($number)) {
    return $number; 
  }
}

function callforward_set_number($extension, $number, $type = "CF") {
  global $astman;

  switch ($type) {
    case 'CFU':
      $cf_type = 'CFU';
    break;
    case 'CFB':
      $cf_type = 'CFB';
    break;
    case 'CF':
    default:
      $cf_type = 'CF';
    break;
  }

  return $astman->database_put($cf_type, $extension, $number);
}

function callforward_set_ringtimer($extension, $ringtimer = 0) {
  global $astman;

  if ($ringtimer > 120) {
    $ringtimer = 120;
  } else if ($ringtimer < -1) {
    $ringtimer = -1;
  }

  return $astman->database_put("AMPUSER", $extension . '/cfringtimer', $ringtimer);
}

function callforward_get_ringtimer($extension) {
  global $astman;

  return $astman->database_get('AMPUSER', $extension . '/cfringtimer');
}
?>