I have a problem why i install the SalesOpportunity module no activities addon? under the activities addon have task and phonecall function. I need this two function.


public function activities_addon($r) {

		$gb = $this->init_module('Utils_GenericBrowser',null,'activities_addon');

		$gb->set_table_columns(array(

				array('name'=>'Type', 'width'=>3),

				array('name'=>'Title', 'width'=>9),

				array('name'=>'Employees', 'width'=>9),

				array('name'=>'Date/Deadline', 'width'=>9)

			));

		$inc_task = (ModuleManager::is_installed('CRM_Task')>=0);

		$inc_meeting = (ModuleManager::is_installed('CRM_Meeting')>=0);

		$inc_phonecall = (ModuleManager::is_installed('CRM_PhoneCall')>=0);

		$count = 0;

		if ($inc_task) $count += $count_tasks = Utils_RecordBrowserCommon::get_records_count('task', array('opportunity'=>$r['id']));

		if ($inc_phonecall) $count += $count_phonecalls = Utils_RecordBrowserCommon::get_records_count('phonecall', array('opportunity'=>$r['id']));

		if ($inc_meeting) $count += $count_meetings = Utils_RecordBrowserCommon::get_records_count('crm_meeting', array('opportunity'=>$r['id']));

		$limit = $gb->get_limit($count);

		$rec_limit = array('numrows'=>$limit['offset']+$limit['numrows'], 'offset'=>0);

		$tasks = array();

		$phonecalls = array();

		$meetings = array();

		if ($inc_task) $tasks = Utils_RecordBrowserCommon::get_records('task', array('opportunity'=>$r['id']), array(), array('deadline'=>'DESC'));

		if ($inc_phonecall) $phonecalls = Utils_RecordBrowserCommon::get_records('phonecall', array('opportunity'=>$r['id']), array(), array('date_and_time'=>'DESC'));

		if ($inc_meeting) $meetings = Utils_RecordBrowserCommon::get_records('crm_meeting', array('opportunity'=>$r['id']), array(), array('date'=>'DESC', 'time'=>'DESC'));

		$activities = array();

		$count = 0;

		while ($count<$rec_limit['numrows']) {

			$task = reset($tasks);

			$phonecall = reset($phonecalls);

			$meeting = reset($meetings);

			if ($task) $task_tstamp = intval(strtotime($task['deadline']));

			else $task_tstamp = -1;

			if ($phonecall) $phonecall_tstamp = strtotime($phonecall['date_and_time']);

			else $phonecall_tstamp = -1;

			if ($meeting) $meeting_tstamp = strtotime($meeting['date'].' '.date('H:i:s',strtotime($meeting['time'])));

			else $meeting_tstamp = -1;

			if (!$task && !$meeting && !$phonecall) break;

			$pick = 'task';

			if ($phonecall_tstamp>$task_tstamp) $pick = 'phonecall';

			if ($meeting_tstamp>$task_tstamp && $meeting_tstamp>$phonecall_tstamp) $pick = 'meeting';

			switch ($pick) {

				case 'task':

						$task = array_shift($tasks);

						$arr = array(

							'Task',

							CRM_TasksCommon::display_title($task,false),

							CRM_ContactsCommon::display_contact(array('emp'=>$task['employees']),false,array('id'=>'emp','param'=>';CRM_ContactsCommon::contact_format_no_company')),

							$task['deadline']?Base_RegionalSettingsCommon::time2reg($task['deadline'],false,true,false):'---'

						);

						$tab = 'task';

						$id = $task['id'];

						break;

				case 'phonecall':

						$phonecall = array_shift($phonecalls);

						$arr = array(

							'Phonecall',

							CRM_PhoneCallCommon::display_subject($phonecall),

							CRM_ContactsCommon::display_contact(array('emp'=>$phonecall['employees']),false,array('id'=>'emp','param'=>';CRM_ContactsCommon::contact_format_no_company')),

							Base_RegionalSettingsCommon::time2reg($phonecall['date_and_time'], 'without_seconds',true,false)

						);

						$tab = 'phonecall';

						$id = $phonecall['id'];

						break;

				case 'meeting':

						$meeting = array_shift($meetings);

						$arr = array(

							'Meeting',

							CRM_MeetingCommon::display_title($meeting),

							CRM_ContactsCommon::display_contact(array('emp'=>$meeting['employees']),false,array('id'=>'emp','param'=>';CRM_ContactsCommon::contact_format_no_company')),

							Base_RegionalSettingsCommon::time2reg($meeting_tstamp, 'without_seconds')

						);

						$tab = 'crm_meeting';

						$id = $meeting['id'];

						break;

				default:

						$arr = array(

							'Error',

							$pick,

							serialize($$pick),

							''

						);

			}

			if ($count>=$limit['offset']) {

				$gb_row = $gb->get_new_row();

				$gb_row->add_data_array($arr);

				$gb_row->add_action(Utils_RecordBrowserCommon::create_record_href($tab, $id, 'view'), 'View');

				$gb_row->add_action(Utils_RecordBrowserCommon::create_record_href($tab, $id, 'edit'), 'Edit');

			}

			$count++;

		}

		$this->display_module($gb);

	}
This code is activities addon? This is the original code. I never modify.
Can someone help me solve this problem please, my SalesOpportunity module no activities addon and task and phonecall fucntion.
Thanks
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