/**
 * create purchase another button
 *
 * @param array userdata
 * @retun string html output
 */
function mgm_get_purchase_another_subscription_button($args = array())
{
    global $wpdb;
    //ceck settings
    $settings = mgm_get_class('system')->get_setting();
    // check
    if (!isset($settings['enable_multiple_level_purchase']) || isset($settings['enable_multiple_level_purchase']) && !bool_from_yn($settings['enable_multiple_level_purchase'])) {
        return;
    }
    // current user
    $user = wp_get_current_user();
    // validate
    if (!$user->ID) {
        // query string
        $user = mgm_get_user_from_querystring();
    }
    // validate
    if (!$user->ID) {
        return __('No such user', 'mgm');
    }
    // userdata
    $username = $user->user_login;
    $mgm_home = get_option('siteurl');
    $member = mgm_get_member($user->ID);
    $system_obj = mgm_get_class('system');
    $membership_type = mgm_get_user_membership_type($user->ID, 'code');
    $packs_obj = mgm_get_class('subscription_packs');
    $packs = $packs_obj->get_packs('upgrade');
    $duration_str = $packs_obj->duration_str;
    $trial_taken = $member->trial_taken;
    // pack_ids
    $pack_ids = mgm_get_members_packids($member);
    $pack_membership_types = mgm_get_subscribed_membershiptypes($user->ID, $member);
    // query_arg
    $form_action = mgm_get_custom_url('transactions', false, array('action' => 'purchase_another', 'username' => $username));
    //issue 1009
    if (isset($settings['membership_details_url'])) {
        $membership_details_url = $settings['membership_details_url'];
    } else {
        $membership_details_url = get_admin_url() . 'profile.php?page=mgm/profile';
    }
    // cancel
    $cancel_url = $membership_details_url;
    // $cancel_url = mgm_get_custom_url('membership_details');
    // active modules
    $a_payment_modules = $system_obj->get_active_modules('payment');
    // 	selected_subscription
    $selected_subs = mgm_get_selected_subscription($args);
    // second step, after post
    if (isset($_POST['submit'])) {
        // verify selected
        if (!isset($_POST['subs_opt'])) {
            // die
            return sprintf(__('Package not selected, <a href="%s">go back</a>.', 'mgm'), $_POST['form_action']);
            exit;
        }
        // get subs data
        $subs_opt_pack = mgm_decode_package($_POST['subs_opt']);
        extract($subs_opt_pack);
        // check
        $valid = false;
        // loop packs
        foreach ($packs as $pack) {
            // check
            //check pack id as well: issue#: 580
            if ($pack['cost'] == $cost && $pack['duration'] == $duration && $pack['duration_type'] == $duration_type && $membership_type == $pack['membership_type'] && $pack_id == $pack['id']) {
                $valid = true;
                break;
            }
        }
        // error
        if (!$valid) {
            return __('Invalid data passed', 'mgm');
            exit;
        }
        // get object
        $member = new mgm_member($user->ID);
        $temp_membership = $member->_default_fields();
        $temp_membership['membership_type'] = $membership_type;
        $temp_membership['pack_id'] = $pack_id;
        //issue #860
        //if (isset($_POST['mgm_upgrade_field']['autoresponder']) && ($_POST['mgm_upgrade_field']['autoresponder'])=='Y') {
        if (isset($_POST['mgm_upgrade_field']['autoresponder']) && substr($_POST['mgm_upgrade_field']['autoresponder'], 0, 1) == 'Y') {
            $temp_membership['subscribed'] = 'Y';
            $temp_membership['autoresponder'] = $system_obj->active_modules['autoresponder'];
        }
        //issue #1236
        if (isset($_POST['mgm_upgrade_field']['coupon']) && !empty($_POST['mgm_upgrade_field']['coupon'])) {
            //issue #1250 - Coupon validation
            if (!empty($_POST['form_action'])) {
                // check if its a valid coupon
                if (!($coupon = mgm_get_coupon_data($_POST['mgm_upgrade_field']['coupon']))) {
                    //redirect back to the form
                    $q_arg = array('error_field' => 'Coupon', 'error_type' => 'invalid', 'error_field_value' => $_POST['mgm_upgrade_field']['coupon']);
                    $redirect = add_query_arg($q_arg, $_POST['form_action']);
                    // redirect
                    mgm_redirect($redirect);
                    exit;
                } else {
                    // membership type check
                    // get subs
                    if ($subs_pack = mgm_decode_package(mgm_post_var('subs_opt'))) {
                        // values
                        $coupon_values = mgm_get_coupon_values(NULL, $coupon['value'], true);
                        // check
                        if (isset($coupon_values['new_membership_type']) && $coupon_values['new_membership_type'] != $subs_pack['membership_type']) {
                            $new_membership_type = mgm_get_membership_type_name($coupon_values['new_membership_type']);
                            $q_arg = array('error_field' => 'Coupon', 'error_type' => 'invalid', 'membership_type' => $coupon_values['new_membership_type'], 'error_field_value' => $_POST['mgm_upgrade_field']['coupon']);
                            $redirect = add_query_arg($q_arg, $_POST['form_action']);
                            // redirect
                            mgm_redirect($redirect);
                            exit;
                        }
                    }
                }
            }
        }
        //inserted an incomplete entry for the selected subscription type
        mgm_save_another_membership_fields($temp_membership, $user->ID);
        // save coupon fields and update member object
        $member = mgm_save_partial_fields_purchase_more($user->ID, $membership_type, $cost);
        // coupon
        $purchase_another_coupon = false;
        // array
        if (isset($member->upgrade)) {
            if (is_array($member->upgrade) && isset($member->upgrade['coupon']['id'])) {
                $purchase_another_coupon = $member->upgrade['coupon'];
            } elseif (is_object($member->upgrade) && isset($member->upgrade->coupon->id)) {
                $purchase_another_coupon = mgm_object2array($member->upgrade->coupon);
            }
            // coupon
            mgm_get_purchase_another_coupon_pack($purchase_another_coupon, $pack);
        }
        //save custom fields -issue #1285
        if (isset($_POST['mgm_upgrade_field']) && !empty($_POST['mgm_upgrade_field'])) {
            //member
            $cf_member = mgm_get_member($user->ID);
            //upgrade custom fileds
            $cfu_fileds = mgm_get_class('member_custom_fields')->get_fields_where(array('display' => array('on_multiple_membership_level_purchase' => true)));
            //loop fields
            foreach ($cfu_fileds as $cf_filed) {
                //skip coupon and autoresponder
                if (in_array($cf_filed['name'], array('coupon', 'autoresponder'))) {
                    continue;
                }
                //check
                if (isset($_POST['mgm_upgrade_field'][$cf_filed['name']])) {
                    // check upgrae and required
                    if ((bool) $cf_filed['attributes']['required'] === true) {
                        if (empty($_POST['mgm_upgrade_field'][$cf_filed['name']])) {
                            //redirect back to the form
                            $q_arg = array('error_field' => $cf_filed['label'], 'error_type' => 'empty', 'error_field_value' => $_POST['mgm_upgrade_field'][$cf_filed['name']]);
                            $redirect = add_query_arg($q_arg, $_POST['form_action']);
                            mgm_redirect($redirect);
                            exit;
                        }
                    }
                    //appending custom fields
                    if (isset($cf_member->custom_fields->{$cf_filed}['name'])) {
                        $cf_member->custom_fields->{$cf_filed}['name'] = $_POST['mgm_upgrade_field'][$cf_filed['name']];
                    } else {
                        $cf_member->custom_fields->{$cf_filed}['name'] = $_POST['mgm_upgrade_field'][$cf_filed['name']];
                    }
                }
            }
            $cf_member->save();
        }
        // start html
        $html = '<div>';
        // free
        if (($pack['cost'] == 0 || $membership_type == 'free') && in_array('mgm_free', $a_payment_modules) && mgm_get_module('mgm_free')->is_enabled()) {
            $html .= sprintf('<div>%s - %s</div>', __('Create a free account ', 'mgm'), ucwords($membership_type));
            $module = 'mgm_free';
            // payments url
            $payments_url = mgm_get_custom_url('transactions');
            // if tril module selected and cost is 0 and free moduleis not active
            if ($membership_type == 'trial') {
                if (in_array('mgm_trial', $a_payment_modules)) {
                    $module = 'mgm_trial';
                }
            }
            //Purchase Another Membership Level problem : issue #: 752
            $redirect = add_query_arg(array('method' => 'payment_return', 'module' => $module, 'custom' => $user->ID . '_' . $duration . '_' . $duration_type . '_' . $pack_id . '_Y', 'redirector' => $redirector), $payments_url);
            // redirect
            if (!headers_sent()) {
                @header('location: ' . $redirect);
                exit;
            }
            // js redirect
            $html .= sprintf('<script type="text/javascript">window.location = "%s";</script><div>%s</div>', $redirect, $packs_obj->get_pack_desc($pack));
        } else {
            $html .= sprintf('<div class="mgm_get_subs_btn">%s</div>', $packs_obj->get_pack_desc($pack));
            // coupon
            if (isset($purchase_another_coupon['id'])) {
                $html .= sprintf('<div class="mgm_get_subs_btn">%s</div>', sprintf(__('Using Coupon "%s" - %s', 'mgm'), $purchase_another_coupon['name'], $purchase_another_coupon['description']));
            }
            $html .= sprintf('<div class="mgm_get_subs_btn">%s</div>', __('Please Select from Available Payment Gateways', 'mgm'));
        }
        //bypass if payment gateway field is selected -issue #1764
        if ((double) $pack['cost'] > 0 && isset($_POST['mgm_payment_gateways']) && !empty($_POST['mgm_payment_gateways'])) {
            //init
            $tran_id = 0;
            if (!$tran_id) {
                $tran_id = mgm_add_transaction($pack, array('is_another_membership_purchase' => true, 'user_id' => $user->ID));
            }
            // module
            $mod_obj = mgm_get_module($_POST['mgm_payment_gateways'], 'payment');
            // module end point
            $redirect = $mod_obj->_get_endpoint('html_redirect', false);
            // encode id:
            //encode transaction id
            $encode_tran_id = mgm_encode_id($tran_id);
            //args
            $redirect = add_query_arg(array('tran_id' => $encode_tran_id), $redirect);
            // do the redirect to payment
            mgm_redirect($redirect);
        }
        // init
        $payment_modules = array();
        // when active
        if ($a_payment_modules) {
            // loop
            foreach ($a_payment_modules as $payment_module) {
                // not trial
                if (in_array($payment_module, array('mgm_free', 'mgm_trial'))) {
                    continue;
                }
                //consider only the modules assigned to pack
                if (isset($pack['modules']) && !in_array($payment_module, (array) $pack['modules'])) {
                    continue;
                }
                // store
                $payment_modules[] = $payment_module;
            }
        }
        // loop payment mods if not free
        if (count($payment_modules) && $cost) {
            // transaction
            $tran_id = 0;
            // loop
            foreach ($payment_modules as $module) {
                // module
                $mod_obj = mgm_get_module($module, 'payment');
                // create transaction
                // if(!$tran_id) $tran_id = $mod_obj->_create_transaction($pack, array('is_another_membership_purchase' => true, 'user_id' => $user->ID));
                if (!$tran_id) {
                    $tran_id = mgm_add_transaction($pack, array('is_another_membership_purchase' => true, 'user_id' => $user->ID));
                }
                // button
                $html .= sprintf('<div class="mgm_get_subs_btn">%s</div>', $mod_obj->get_button_subscribe(array('pack' => $pack, 'tran_id' => $tran_id)));
            }
        } else {
            if ($cost) {
                $html .= sprintf('<div class="mgm_get_subs_btn">%s</div>', __('There are no payment gateways available at this time.', 'mgm'));
            }
        }
        // html
        $html .= '</div>';
    } else {
        // first step show upgrade options
        // html
        $html = sprintf('<p class="message register">%s</p>', __('Please Select from Available Membership Packages', 'mgm'));
        // upgrade_packages
        $upgrade_packages = '';
        // pack to modules
        $pack_modules = array();
        // loop
        foreach ($packs as $pack) {
            // default
            $checked = '';
            // skip already purchased packs
            if (in_array($pack['id'], $pack_ids)) {
                continue;
            }
            //skip same membership level subscriptions
            if (in_array($pack['membership_type'], $pack_membership_types)) {
                continue;
            }
            // do not show trial or free as upgradre
            if ($pack['membership_type'] == 'trial' || $pack['membership_type'] == 'free') {
                continue;
            }
            // reset
            $checked = mgm_select_subscription($pack, $selected_subs);
            // skip other when a package sent as selected
            if ($selected_subs !== false) {
                if (empty($checked)) {
                    continue;
                }
            }
            // checked
            if (!$checked) {
                $checked = (int) $pack['default'] == 1 ? ' checked="checked"' : '';
            }
            // duration
            if ($pack['duration'] == 1) {
                $dur_str = rtrim($duration_str[$pack['duration_type']], 's');
            } else {
                $dur_str = $duration_str[$pack['duration_type']];
            }
            $css_group = mgm_get_css_group();
            // encode pack
            $subs_opt_enc = mgm_encode_package($pack);
            // set
            $pack_modules[$subs_opt_enc] = $pack['modules'];
            //issue #867
            if ($css_group != 'none') {
                //expand this if needed
                $css_link_format = '<link rel="stylesheet" href="%s" type="text/css" media="all" />';
                $css_file = MGM_ASSETS_URL . 'css/' . $css_group . '/mgm.form.fields.css';
                $upgrade_packages .= sprintf($css_link_format, $css_file);
            }
            // free
            if (($pack['cost'] == 0 || strtolower($pack['membership_type']) == 'free') && in_array('mgm_free', $a_payment_modules) && mgm_get_module('mgm_free')->enabled == 'Y') {
                // input
                $input = sprintf('<input type="radio" %s class="checkbox" name="subs_opt" value="%s" rel="mgm_subscription_options"/>', $checked, $subs_opt_enc);
                // html
                $upgrade_packages .= '  
							<div class="mgm_subs_wrapper ' . $pack['membership_type'] . '">
								<div class="mgm_subs_option ' . $pack['membership_type'] . '">
									' . $input . '
								</div>
								<div class="mgm_subs_pack_desc ' . $pack['membership_type'] . '">
									' . $packs_obj->get_pack_desc($pack) . '
								</div>
								 <div class="clearfix"></div>
								 <div class="mgm_subs_desc ' . $pack['membership_type'] . '">
									' . mgm_stripslashes_deep($pack['description']) . '
								 </div>
							</div>';
            } else {
                // input
                $input = sprintf('<input type="radio" %s class="checkbox" name="subs_opt" value="%s" rel="mgm_subscription_options"/>', $checked, $subs_opt_enc);
                // html
                $upgrade_packages .= '  
							<div class="mgm_subs_wrapper ' . $pack['membership_type'] . '">
								<div class="mgm_subs_option ' . $pack['membership_type'] . '">
									' . $input . '
								</div>
								<div class="mgm_subs_pack_desc ' . $pack['membership_type'] . '">
									' . $packs_obj->get_pack_desc($pack) . '
								</div>
								 <div class="clearfix"></div>
								 <div class="mgm_subs_desc ' . $pack['membership_type'] . '">
									' . mgm_stripslashes_deep($pack['description']) . '
								 </div>
							</div>';
            }
        }
        // add pack_modules as json data, may consider jquery data later
        if (!empty($pack_modules)) {
            $html .= sprintf('<script language="javascript">var mgm_pack_modules = %s</script>', json_encode($pack_modules));
        }
        // show error
        if (!$upgrade_packages) {
            // html
            $html .= '<div class="mgm_subs_wrapper">
						<div class="mgm_subs_pack_desc">
							' . __('Sorry, no packages available.', 'mgm') . '
						</div>
					 </div>
					 <p>						
						<input type="button" name="cancel" onclick="window.location=\'' . $cancel_url . '\'" value="' . __('Cancel', 'mgm') . '" class="button-primary" />&nbsp;					
					 </p>';
        } else {
            /*			$error_field = mgm_request_var('error_field'); 
            			if(!empty($error_field)) {
            				$errors = new WP_Error();
            				switch (mgm_request_var('error_type')) {
            					case 'empty':
            						$error_string = 'You must provide a ';
            						break;
            					case 'invalid':
            						$error_string = 'Invalid ';
            						break;	
            				}				
            				//issue #703
            				$errors->add( $error_field, __( '<strong>ERROR</strong>: '.$error_string, 'mgm' ).$error_field );
            				$html .= mgm_set_errors($errors, true);					
            			}*/
            // check errors if any:
            $html .= mgm_subscription_purchase_errors();
            // form
            $html .= '<form action="' . $form_action . '" method="post" class="mgm_form"><div class="mgm_get_pack_form_container">';
            $html .= '<input type="hidden" name="form_action" value="' . $form_action . '" />';
            $html .= $upgrade_packages;
            //issue #1285
            $html .= mgm_get_custom_fields($user->ID, array('on_multiple_membership_level_purchase' => true), 'mgm_upgrade_field');
            // html
            $html .= '<input type="hidden" name="ref" value="' . md5($member->amount . '_' . $member->duration . '_' . $member->duration_type . '_' . $member->membership_type) . '" />';
            // set
            $html .= '<p>						
						<input class="button" type="submit" name="submit" value="' . __('Next', 'mgm') . '" />&nbsp;&nbsp;
						<input class="button" type="button" name="cancel" onclick="window.location=\'' . $cancel_url . '\'" value="' . __('Cancel', 'mgm') . '"/>&nbsp;					
					  </p>';
            // html
            $html .= '</div></form>';
        }
    }
    // return
    return $html;
}
function mgm_fb_subscription_options_callback($field, $name, $value)
{
    $options_arr = array();
    // get object
    $packs_obj = mgm_get_class('subscription_packs');
    // get mgm_system
    $system_obj = mgm_get_class('system');
    // args
    $args = array();
    // selected subscription
    $selected_subs = mgm_get_selected_subscription($args);
    // packs
    $packs = $packs_obj->get_packs('register', true, $selected_subs);
    // total
    $total_amount = 0;
    // total calc
    foreach ($packs as $pack) {
        $total_amount += $pack['cost'];
    }
    // active payment modules
    $a_payment_modules = $system_obj->get_active_modules('payment');
    // active module
    if (count($a_payment_modules) == 0 && $total_amount > 0) {
        return sprintf('<p>%s</p>', __('There are no payment gateways active. Please contact the administrator.', 'mgm'));
    } else {
        // payment_module
        $payment_modules = array();
        // loop
        foreach ($a_payment_modules as $payment_module) {
            // skip free/trial
            if (in_array($payment_module, array('mgm_free', 'mgm_trial'))) {
                continue;
            }
            // increment
            $payment_modules[] = $payment_module;
        }
        // loop packs
        foreach ($packs as $pack) {
            // reset
            $checked = mgm_select_subscription($pack, $selected_subs);
            // skip other when a package sent as selected
            if ($selected_subs !== false) {
                if (empty($checked)) {
                    continue;
                }
            }
            // subs encrypted
            $subs_enc = mgm_encode_package($pack);
            if ((strtolower($pack['membership_type']) == 'free' || $pack['cost'] == 0 && mgm_get_module('mgm_free')->enabled == 'Y') && in_array('mgm_free', $a_payment_modules)) {
                $options_arr[$subs_enc] = trim(mgm_stripslashes_deep($packs_obj->get_pack_desc($pack)));
                // trial
            } elseif (strtolower($pack['membership_type']) == 'trial' && in_array('mgm_trial', $a_payment_modules)) {
                $options_arr[$subs_enc] = trim(mgm_stripslashes_deep($packs_obj->get_pack_desc($pack)));
            } else {
                // paid subscription active
                if (count($payment_modules)) {
                    // check cost and hide false
                    if ($pack['cost']) {
                        $options_arr[$subs_enc] = trim(mgm_stripslashes_deep($packs_obj->get_pack_desc($pack)));
                    }
                    // end if
                } elseif ($pack['cost'] > 0) {
                    // set message
                    //$html .= sprintf('<div class="message" style="margin:10px 0px; overflow: auto;color:red;font-weight:bold">%s</div>',__('Please enable a payment module to allow ' . mgm_stripslashes_deep($packs_obj->get_pack_desc($pack)) ,'mgm'));
                }
                // end paid
            }
        }
        // end pack loop
    }
    // return
    return json_encode($options_arr);
}
 function field_subscription_options_callback($field, $name, $value)
 {
     // default -issue #1234
     $dispaly_as_selectbox = true;
     // not select
     if ($field['type'] != 'select') {
         $dispaly_as_selectbox = false;
     }
     // get object
     $packs_obj = mgm_get_class('subscription_packs');
     // get mgm_system
     $system_obj = mgm_get_class('system');
     // args
     $args = $this->get_config('args', array());
     // selected subscription
     $selected_subs = mgm_get_selected_subscription($args);
     // packs
     $packs = $packs_obj->get_packs('register', true, $selected_subs);
     // total
     $total_amount = 0;
     // total calc
     foreach ($packs as $pack) {
         $total_amount += $pack['cost'];
     }
     // active payment modules
     $a_payment_modules = $system_obj->get_active_modules('payment');
     // no active module
     if (count($a_payment_modules) == 0 && $total_amount > 0) {
         // return
         return sprintf('<p>%s</p>', __('There are no payment gateways active. Please contact the administrator.', 'mgm'));
     }
     // process next
     // init html
     $html = $subsription_options = '';
     // payment_module
     $payment_modules = array();
     // loop
     foreach ($a_payment_modules as $payment_module) {
         // skip free/trial
         // issue#: 483
         if (in_array($payment_module, array('mgm_free', 'mgm_trial'))) {
             continue;
         }
         // increment
         $payment_modules[] = $payment_module;
     }
     // init
     $options = $selected = '';
     // pack to modules
     $pack_modules = array();
     // loop packs
     foreach ($packs as $pack) {
         // reset
         $checked = mgm_select_subscription($pack, $selected_subs);
         // skip other packs when a package sent as selected
         if ($selected_subs !== false && empty($checked)) {
             continue;
         }
         // subs encrypted
         $subs_enc = mgm_encode_package($pack);
         // set modules for pack
         $pack_modules[$subs_enc] = $pack['modules'];
         // posted select iss#732
         if (isset($_POST['mgm_subscription'])) {
             // match
             if ($subs_enc == $_POST['mgm_subscription']) {
                 // check
                 $checked = ' checked="checked"';
                 // selected
                 $selected = ' SELECTED';
             } else {
                 $checked = $selected = '';
             }
         }
         // hidden on single package
         if (isset($pack['hidden_single']) && (bool) $pack['hidden_single'] == true) {
             $html .= sprintf('<input type="hidden" name="mgm_subscription" value="%s" />', $subs_enc);
             $html .= '<style type="text/css">.subscription_options_box{display: none}</style>';
         } else {
             //options - issue #1234
             $opt_id = 'mgm_' . $pack['membership_type'] . $pack['id'];
             // pack_desc
             $pack_desc = mgm_stripslashes_deep($packs_obj->get_pack_desc($pack));
             // issue #338:(enable free gateway for cost=0)
             if ((strtolower($pack['membership_type']) == 'free' || $pack['cost'] == 0 && mgm_get_module('mgm_free')->is_enabled()) && in_array('mgm_free', $a_payment_modules)) {
                 // get html
                 $this->_get_field_subscription_options_html($subs_enc, $opt_id, $selected, $checked, $pack, $dispaly_as_selectbox, $pack_desc, $options, $html);
                 // trial
             } elseif (strtolower($pack['membership_type']) == 'trial' && in_array('mgm_trial', $a_payment_modules)) {
                 // get html
                 $this->_get_field_subscription_options_html($subs_enc, $opt_id, $selected, $checked, $pack, $dispaly_as_selectbox, $pack_desc, $options, $html);
             } else {
                 // paid subscription active
                 if (count($payment_modules)) {
                     // check cost and hide false
                     if ($pack['cost']) {
                         // get html
                         $this->_get_field_subscription_options_html($subs_enc, $opt_id, $selected, $checked, $pack, $dispaly_as_selectbox, $pack_desc, $options, $html);
                     }
                     // end if
                 } elseif ($pack['cost'] > 0) {
                     // set message
                     $html .= sprintf('<div class="message" style="margin:10px 0px; overflow: auto;color:red;font-weight:bold">%s</div>', __('Please enable a payment module to allow ' . mgm_stripslashes_deep($packs_obj->get_pack_desc($pack)), 'mgm'));
                 }
                 // end paid
             }
         }
         // end hide check
     }
     // end pack loop
     // mgm_pr($pack_modules);
     //issue #1234 and issue #1476
     if ($dispaly_as_selectbox && !empty($options)) {
         // class
         $classes = array($name);
         // required
         if (isset($field['attributes']) && $field['attributes']['required']) {
             $classes[] = 'required';
         }
         // extra
         if (isset($field['attributes']) && isset($field['attributes']['class'])) {
             $classes[] = $field['attributes']['class'];
         }
         // join
         $class = implode(' ', $classes);
         // set
         $html .= sprintf('<div class="mgm_subs_wrapper"><select name="mgm_subscription" id="mgm_subscription" class="%s" rel="mgm_subscription_options">%s</select></div><div id="mgm_payment_bindlist"></div>', $class, $options);
     }
     // add pack modules as json data, may consider jquery data later
     if (!empty($pack_modules)) {
         $html .= sprintf('<script language="javascript">var mgm_pack_modules = %s</script>', json_encode($pack_modules));
     }
     // return
     return empty($html) ? sprintf('<p style="color:red"><b>%s</b></p>', __('No subscription options available', 'mgm')) : $html;
 }
/**
 * return packs
 *
 * @param obj $packs_obj :can be null
 * @param obj $types_obj :can be null
 * @param array $exclude : exclude ids, can be null
 * @return array
 */
function mgm_get_subscription_packages($packs_obj = null, $types_obj = null, $exclude = array())
{
    // object
    $packs_obj = mgm_get_class('subscription_packs');
    $types_obj = mgm_get_class('membership_types');
    // packages
    $packages = array();
    // loop
    foreach ($packs_obj->get_packs('all') as $pack) {
        //skip passed ids
        if (in_array($pack['id'], $exclude)) {
            continue;
        }
        // enc
        $subs_opt_enc = mgm_encode_package($pack);
        // key
        $packages[] = array('id' => $pack['id'], 'key' => $subs_opt_enc, 'label' => $packs_obj->get_pack_desc($pack), 'membership' => $types_obj->get_type_name($pack['membership_type']), 'description' => $pack['description']);
    }
    // return
    return $packages;
}