<?php
class Employee extends Person
{
	/*
	Determines if a given person_id is an employee
	*/
	public function exists($person_id)
	{
		$this->db->from('employees');
		$this->db->join('people', 'people.person_id = employees.person_id');
		$this->db->where('employees.person_id', $person_id);

		return ($this->db->get()->num_rows() == 1);
	}
	/*
	Gets all of state
	*/
	public function get_state() {
	   $this->db->from('state');
	   $this->db->order_by('state_name', 'asc');
	   return $this->db->get();
	}

	/*
	Gets Roles
	*/
	public function get_role() {
	   $this->db->from('role');
	   $this->db->order_by('role_name', 'asc');
	   return $this->db->get();
	}
	/*
	Gets Reporter
	*/
	public function get_reporter() {
		$this->db->from('employees');
		$this->db->join('people', 'people.person_id = employees.person_id');
		$this->db->join('role', 'employees.role = role.role_id');
		 $this->db->where('role != ',3,FALSE);

	   return $this->db->get();
	}
	
	public function get_grade() {
	   $this->db->from('grade');
	   $this->db->order_by('grade', 'asc');
	   return $this->db->get();
	}

	/*
	Gets Category
	*/
	public function get_category() {
	   $this->db->from('category');
	   $this->db->order_by('cat_name', 'asc');
	   return $this->db->get();
	}

	/*
	Gets Branch
	*/
	public function get_branch() {
	   $this->db->from('branches');
	   $this->db->order_by('branch_name', 'asc');
	   return $this->db->get();
	}

	/*
	Gets total of rows
	*/
	public function get_total_rows()
	{

		$this->db->from('employees');
		$this->db->where('deleted', 0);
		return $this->db->count_all_results();
	}

	/*
	Returns all the employees
	*/
	public function get_all($limit = 10000, $offset = 0)
	{

		$this->db->from('employees');
		$this->db->where('deleted', 0);
		$this->db->join('people', 'employees.person_id = people.person_id');
		$this->db->order_by('last_name', 'asc');
		$this->db->limit($limit);
		$this->db->offset($offset);

		return $this->db->get();
	}
	public function get_info_empid($employee_id){
		$this->db->from('employees');
		$this->db->join('people', 'people.person_id = employees.person_id');
		$this->db->where('employees.id', $employee_id);
		$query = $this->db->get();
		if($query->num_rows() == 1){
			return $query->row();
		}
		return false;
	}
	/*
	Gets information about a particular employee
	*/
	public function get_info($employee_id)
	{
		$this->db->from('employees');
		$this->db->join('people', 'people.person_id = employees.person_id');
		$this->db->where('employees.person_id', $employee_id);
		$query = $this->db->get();

		if($query->num_rows() == 1)
		{
			return $query->row();
		}
		else
		{
			//Get empty base parent object, as $employee_id is NOT an employee
			$person_obj = parent::get_info(-1);

			//Get all the fields from employee table
			//append those fields to base parent object, we we have a complete empty object
			// foreach($this->db->list_fields('employees') as $field)
			// {
			// 	$person_obj->$field = '';

			// 	if($field === "username"){

			// 		$today    = date("ym");
			// 		$query    = $this->db->query("SELECT count(*) as count FROM ospos_employees where username like '%$today%'");
			// 		$row 	  = $query->row_array();
			// 		$empCount = $row['count'];
			// 		if((int)$empCount === 0){
			// 			$empCount = 1;
			// 		}else{
			// 			$empCount = $empCount + 1;
			// 		}
			// 		$empCount = str_pad($empCount,4,"0",STR_PAD_LEFT);

			// 		$user_id  = "AP".date("ym").$empCount;
			// 		$person_obj->$field = $user_id;
			// 	}
			// }

			return $person_obj;
		}
	}

	/*
	Gets information about multiple employees
	*/
	public function get_multiple_info($employee_ids)
	{

		$this->db->from('employees');
		$this->db->join('people', 'people.person_id = employees.person_id');
		$this->db->where_in('employees.person_id', $employee_ids);
		$this->db->order_by('first_name', 'asc');

		return $this->db->get();
	}

	/*
	Inserts or updates an employee
	*/
	public function save_employee(&$person_data, &$employee_data, &$grants_data, $employee_id = FALSE){

		$success = FALSE;

		//Run these queries as a transaction, we want to make sure we do all or nothing
		$this->db->trans_start();

		if((int)$employee_id === -1){
			$query = $this->db->query("SELECT count(*) as count FROM ospos_employees where username = '".$employee_data['username']."'");
			$row = $query->row_array();
			$empCount = $row['count'];
			//echo "empCount :: $empCount";
			if((int)$empCount === 0){
				parent::save($person_data, $employee_id);
				$employee_data['person_id'] = $employee_id = $person_data['person_id'];
				$success = $this->db->insert('employees', $employee_data);
			}

		}else{
			parent::save($person_data, $employee_id);
			$this->db->where('person_id', $employee_id);
			$success = $this->db->update('employees', $employee_data);
		}

		//We have either inserted or updated a new employee, now lets set permissions.
		if($success){
			//First lets clear out any grants the employee currently has.
			$success = $this->db->delete('grants', array('person_id' => $employee_id));
			//Now insert the new grants
			if($success){
				foreach($grants_data as $permission_id){
					$success = $this->db->insert('grants', array('permission_id' => $permission_id, 'person_id' => $employee_id));
				}
			}
		}

		$this->db->trans_complete();
		$success &= $this->db->trans_status();
		return $success;
	}

	/*
	Deletes one employee
	*/
	public function delete($employee_id)
	{
		$success = FALSE;

		//Don't let employees delete theirself
		if($employee_id == $this->get_logged_in_employee_info()->person_id)
		{
			return FALSE;
		}

		//Run these queries as a transaction, we want to make sure we do all or nothing
		$this->db->trans_start();

		//Delete permissions
		if($this->db->delete('grants', array('person_id' => $employee_id)))
		{
			$this->db->where('person_id', $employee_id);
			$success = $this->db->update('employees', array('deleted' => 1));
		}

		$this->db->trans_complete();

		return $success;
	}

	/*
	Deletes a list of employees
	*/
	public function delete_list($employee_ids)
	{
		$success = FALSE;

		//Don't let employees delete theirself
		if(in_array($this->get_logged_in_employee_info()->person_id, $employee_ids))
		{
			return FALSE;
		}

		//Run these queries as a transaction, we want to make sure we do all or nothing
		$this->db->trans_start();

		$this->db->where_in('person_id', $employee_ids);
		//Delete permissions
		if($this->db->delete('grants'))
		{
			//delete from employee table
			$this->db->where_in('person_id', $employee_ids);
			$success = $this->db->update('employees', array('deleted' => 1));
		}

		$this->db->trans_complete();

		return $success;
 	}

 	/*
	Gets rows
	*/
	public function get_found_rows($search)
	{
		$this->db->from('employees');
		$this->db->join('people', 'employees.person_id = people.person_id');
		$this->db->group_start();
			$this->db->like('first_name', $search);
			$this->db->or_like('last_name', $search);
			$this->db->or_like('email', $search);
			$this->db->or_like('phone_number', $search);
			$this->db->or_like('username', $search);
			$this->db->or_like('CONCAT(first_name, " ", last_name)', $search);
		$this->db->group_end();
		$this->db->where('deleted', 0);

		return $this->db->get()->num_rows();
	}

	/*
	Performs a search on employees
	*/
	public function search($search, $rows = 0, $limit_from = 0, $sort = 'employees.id', $order = 'asc')
	{

		$this->db->from('employees');
		$this->db->join('people', 'employees.person_id = people.person_id');
		$this->db->group_start();
			$this->db->like('first_name', $search);
			$this->db->or_like('last_name', $search);
			$this->db->or_like('email', $search);
			$this->db->or_like('phone_number', $search);
			$this->db->or_like('username', $search);
			$this->db->or_like('CONCAT(first_name, " ", last_name)', $search);
		$this->db->group_end();

		$this->db->where('deleted', 0);
		$this->db->order_by($sort, $order);


		if($rows > 0)
		{

			$this->db->limit($rows, $limit_from);
		}


		return $this->db->get();
		//turn $this->db->last_query(); die;
	}

	/*
	Attempts to login employee and set session. Returns boolean based on outcome.
	*/
	public function login($username, $password)
	{
		$query = $this->db->get_where('employees', array('username' => $username, 'password' => md5($password), 'deleted' => 0), 1);

//echo $this->db->last_query(); die;
		if($query->num_rows() == 1){
			$row = $query->row();
			$this->session->set_userdata('person_id', $row->person_id);
			$this->session->set_userdata('shop_id', $row->shop_id);
			$this->session->set_userdata('emp_id', $row->id);
			$this->session->set_userdata('emp_role', $row->role);
			$this->session->set_userdata('emp_category', $row->category);
			$this->session->set_userdata('emp_grade', $row->grade);
      		$qry = $this->db->get_where('people', array('person_id' => $person_id), 1);
		  	$emp_info = $qry->row();
			$name = $emp_info->first_name." ".$emp_info->last_name;
		  	$this->session->set_userdata('emp_name', $name);

		    $qry = $this->db->query("SELECT * from ospos_team where find_in_set('$row->id',teammembers)");
		    $team_count = $qry->num_rows();
			if((int)$team_count === 1){
				$team_info = $qry->row();
			}else{
				$qry = $this->db->query("SELECT * from ospos_team where teamleader = '$row->id'");
				$team_count = $qry->num_rows();
				if((int)$team_count === 1){
					$team_info = $qry->row();
				}
			}
			$teamleader = $team_info->teamleader;
			$this->session->set_userdata('teamleader', $teamleader);

			$area_query = $this->db->query("SELECT * from ospos_employees where id = '$teamleader'");
			$area_info  =  $area_query->row();
			$this->session->set_userdata('area_manager', $area_info->reporting);
			if($row->role === "5"){
				$rm_query = $this->db->query("SELECT * from ospos_employees where id = '$row->id'");
				$rm_info  =  $rm_query->row();
				$this->session->set_userdata('rm_manager', $rm_info->reporting);
			}else
			if($row->role === "8"){
				$re_query = $this->db->query("SELECT * from ospos_employees where id = '$row->id'");
				$re_info  =  $re_query->row();
				$this->session->set_userdata('re_manager', $re_info->reporting);
			}
			
			return TRUE;
		}

		return FALSE;
	}

	/*
	Logs out a user by destorying all session data and redirect to login
	*/
	public function logout()
	{
		$this->session->sess_destroy();
		redirect('login');
	}

	/*
	Determins if a employee is logged in
	*/
	public function is_logged_in()
	{
		return ($this->session->userdata('person_id') != FALSE);
	}

	/*
	Gets information about the currently logged in employee.
	*/
	public function get_logged_in_employee_info()
	{
		if($this->is_logged_in())
		{
			return $this->get_info($this->session->userdata('person_id'));
		}

		return FALSE;
	}

	/*
	Determines whether the employee has access to at least one submodule
	 */
	public function has_module_grant($permission_id, $person_id)
	{
		$this->db->from('grants');
		$this->db->like('permission_id', $permission_id, 'after');
		$this->db->where('person_id', $person_id);
		$result_count = $this->db->get()->num_rows();
		if($result_count != 1)
		{
			return ($result_count != 0);
		}

		return $this->has_subpermissions($permission_id);
	}

 	/*
	Checks permissions
	*/
	public function has_subpermissions($permission_id)
	{
		$this->db->from('permissions');
		$this->db->like('permission_id', $permission_id.'_', 'after');

		return ($this->db->get()->num_rows() == 0);
	}

	/*
	Determines whether the employee specified employee has access the specific module.
	*/
	public function has_grant($permission_id, $person_id)
	{
		//if no module_id is null, allow access
		if($permission_id == null)
		{
			return TRUE;
		}

		$query = $this->db->get_where('grants', array('person_id' => $person_id, 'permission_id' => $permission_id), 1);


		return ($query->num_rows() == 1);
	}

 	/*
	Gets employee permission grants
	*/
	public function get_employee_grants($person_id)
	{
		$this->db->from('grants');
		$this->db->where('person_id', $person_id);

		return $this->db->get()->result_array();
	}
}
?>