<?php
class Employee extends Person{
	
	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);
	}
	
	public function get_state() {
	   $this->db->from('state');
	   $this->db->order_by('state_name', 'asc');
	   return $this->db->get();
	}

	public function get_role(){
	   $this->db->from('role');
	   $this->db->where('status = ',1);
	   $this->db->order_by('role_id', 'asc');
	   return $this->db->get();
	}
	
	
	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_total_rows() {
		$this->db->from('employees');
		$this->db->where('deleted', 0);
		return $this->db->count_all_results();
	}

	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;
	}
	
	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{
			$person_obj = parent::get_info(-1);
			return $person_obj;
		}
	}

	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();
	}

	public function save_employee(&$person_data, &$employee_data, &$grants_data, $employee_id = FALSE){
		$success = FALSE;
		$this->db->trans_start();
		if((int)$employee_id === -1){
			$query = $this->db->query("SELECT count(*) as count FROM sblttweb_employees where username = '".$employee_data['username']."'");
			$row = $query->row_array();
			$empCount = $row['count'];
			if((int)$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', $employee_data);
		}
		if($success){
			$success = $this->db->delete('grants', array('person_id' => $employee_id));
			if($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;
	}

	public function delete($employee_id){
		$success = FALSE;
		if($employee_id == $this->get_logged_in_employee_info()->person_id){
			return FALSE;
		}
		$this->db->trans_start();
		if($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;
	}

	public function delete_list($employee_ids){
		$success = FALSE;
		if(in_array($this->get_logged_in_employee_info()->person_id, $employee_ids)){
			return FALSE;
		}
		$this->db->trans_start();
		$this->db->where_in('person_id', $employee_ids);
		if($this->db->delete('grants')){
			$this->db->where_in('person_id', $employee_ids);
			$success = $this->db->update('employees', array('deleted' => 1));
		}
		$this->db->trans_complete();
		return $success;
 	}

	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();
	}

	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();
	}

	public function login($username, $password){
		$query = $this->db->get_where('employees', array('username' => $username, 'password' => md5($password), 'deleted' => 0), 1);
		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);
			return TRUE;
		}
		return FALSE;
	}

	public function logout(){
		$this->session->sess_destroy();
		redirect('login');
	}

	public function is_logged_in(){
		return ($this->session->userdata('person_id') != FALSE);
	}

	public function get_logged_in_employee_info(){
		if($this->is_logged_in()){
			return $this->get_info($this->session->userdata('person_id'));
		}
		return FALSE;
	}

	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);
	}

	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);
	}

	public function has_grant($permission_id, $person_id){
		if($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);
	}

	public function get_employee_grants($person_id){
		$this->db->from('grants');
		$this->db->where('person_id', $person_id);
		return $this->db->get()->result_array();
	}
}
?>