<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Logbooks_model extends CI_Model {

    function show_all() {
        $this->db->where('user_id', $this->session->userdata('user_id'));
        $this->db->order_by('logbook_name');
		return $this->db->get('station_logbooks');
	}

	function add() {
		// Create data array with field values
		$data = array(
			'user_id' => $this->session->userdata('user_id'),
			'logbook_name' =>  xss_clean($this->input->post('stationLogbook_Name', true)),
		);

		// Insert Records
		$this->db->insert('station_logbooks', $data);
		$logbook_id = $this->db->insert_id();

		// check if user has no active logbook yet
		if ($this->session->userdata('active_station_logbook') === null) {
			// set logbook active
			$this->set_logbook_active($logbook_id);

			// update user session data
			$CI =& get_instance();
			$CI->load->model('user_model');
			$CI->user_model->update_session($this->session->userdata('user_id'));
		}
	}

	function delete($id) {
		// Clean ID
		$clean_id = $this->security->xss_clean($id);

		// do not delete active logbook
		if ($this->session->userdata('active_station_logbook') === $clean_id) {
			return;
		}

		// Delete logbook
		$this->db->where('user_id', $this->session->userdata('user_id'));
		$this->db->where('logbook_id', $id);
		$this->db->delete('station_logbooks'); 
	}

	function edit() {
		$data = array(
			'logbook_name' => xss_clean($this->input->post('station_logbook_name', true)),
		);

		$this->db->where('user_id', $this->session->userdata('user_id'));
		$this->db->where('logbook_id', xss_clean($this->input->post('logbook_id', true)));
		$this->db->update('station_logbooks', $data); 
	}

	function set_logbook_active($id) {
		// Clean input
		$cleanId = xss_clean($id);

		// be sure that logbook belongs to user
		if (!$this->check_logbook_is_accessible($cleanId)) {
			return;
		}

		$data = array(
			'active_station_logbook' => $cleanId,
		);

		$this->db->where('user_id', $this->session->userdata('user_id'));
		$this->db->update('users', $data); 
	}

	function logbook($id) {
		// Clean ID
		$clean_id = $this->security->xss_clean($id);

		$this->db->where('user_id', $this->session->userdata('user_id'));
		$this->db->where('logbook_id', $clean_id);
		return $this->db->get('station_logbooks');
	}


	// Creates relationship between a logbook and a station location
	function create_logbook_location_link($logbook_id, $location_id) {
		// Clean ID
		$clean_logbook_id = $this->security->xss_clean($logbook_id);
		$clean_location_id = $this->security->xss_clean($location_id);

		// be sure that logbook belongs to user
		if (!$this->check_logbook_is_accessible($clean_logbook_id)) {
			return;
		}

		// be sure that station belongs to user
		$CI =& get_instance();
		$CI->load->model('Stations');
		if (!$CI->Stations->check_station_is_accessible($clean_location_id)) {
			return;
		}

		// Create data array with field values
		$data = array(
			'station_logbook_id' => $clean_logbook_id,
			'station_location_id' =>  $clean_location_id,
		);

		// Insert Record
		$this->db->insert('station_logbooks_relationship', $data); 
	}

	function relationship_exists($logbook_id, $location_id) {
		$this->db->where('station_logbook_id', $logbook_id);
		$this->db->where('station_location_id', $location_id);
		$query = $this->db->get('station_logbooks_relationship');
		
		if ($query->num_rows() > 0){
			return true;
		}
		else{
			return false;
		}
	}


	function is_public_slug_available($slug) {
		// Clean public_slug
		$clean_slug = $this->security->xss_clean($slug);


		$this->db->where('public_slug', $clean_slug);
		$query = $this->db->get('station_logbooks');
		
		if ($query->num_rows() > 0){
			return false;
		}
		else{
			return true;
		}
	}

	function list_logbook_relationships($logbook_id) {

		$relationships_array = array();

		$this->db->where('station_logbook_id', $logbook_id);
		$query = $this->db->get('station_logbooks_relationship');
		
		if ($query->num_rows() > 0){
			foreach ($query->result() as $row)
			{
				array_push($relationships_array, $row->station_location_id);
			}

			return $relationships_array;
		}
		else{
			return false;
		}
	}

	function list_logbooks_linked($logbook_id) {

		$relationships_array = array();

		$this->db->where('station_logbook_id', $logbook_id);
		$query = $this->db->get('station_logbooks_relationship');
		

		if ($query->num_rows() > 0){
			foreach ($query->result() as $row)
			{
				array_push($relationships_array, $row->station_location_id);
			}

			$this->db->where_in('station_id', $relationships_array);
			$query = $this->db->get('station_profile');
			
			return $query;
		}
		else{
			return false;
		}
	}

	function delete_relationship($logbook_id, $station_id) {
		// Clean ID
		$clean_logbook_id = $this->security->xss_clean($logbook_id);
		$clean_station_id = $this->security->xss_clean($station_id);

		// be sure that logbook belongs to user
		if (!$this->check_logbook_is_accessible($clean_logbook_id)) {
			return;
		}

		// be sure that station belongs to user
		$CI =& get_instance();
		$CI->load->model('Stations');
		if (!$CI->Stations->check_station_is_accessible($clean_station_id)) {
			return;
		}

		// Delete relationship
		$this->db->where('station_logbook_id', $clean_logbook_id);
		$this->db->where('station_location_id', $clean_station_id);
		$this->db->delete('station_logbooks_relationship'); 
	}

	public function check_logbook_is_accessible($id) {
	    // check if logbook belongs to user
	    $this->db->select('logbook_id');
		$this->db->where('user_id', $this->session->userdata('user_id'));
		$this->db->where('logbook_id', $id);
		$query = $this->db->get('station_logbooks');
		if ($query->num_rows() == 1) {
			return true;
		}
		return false;
	}
}
?>