Cloudlog/application/models/Distances_model.php

324 wiersze
11 KiB
PHP

<?php
if (!defined('BASEPATH')) exit('No direct script access allowed');
class Distances_model extends CI_Model
{
function get_distances($postdata, $measurement_base)
{
$CI =& get_instance();
$CI->load->model('logbooks_model');
$logbooks_locations_array = $CI->logbooks_model->list_logbook_relationships($this->session->userdata('active_station_logbook'));
if (!$logbooks_locations_array) {
header('Content-Type: application/json');
echo json_encode(array('Error' => 'No QSOs found to plot.'));
return;
}
$result = array();
foreach ($logbooks_locations_array as $station_id) {
$station_gridsquare = $this->find_gridsquare($station_id);
if ($station_gridsquare != null) {
$gridsquare = explode(',', $station_gridsquare); // We need to convert to an array, since a user can enter several gridsquares
$this->db->select('col_call callsign, col_gridsquare grid');
$this->db->where('LENGTH(col_gridsquare) >', 0);
if ($postdata['band'] == 'sat') {
$this->db->where('col_prop_mode', $postdata['band']);
if ($postdata['sat'] != 'All') {
$this->db->where('col_sat_name', $postdata['sat']);
}
}
else {
$this->db->where('col_band', $postdata['band']);
}
$this->db->where('station_id', $station_id);
$queryresult = $this->db->get($this->config->item('table_name'));
if ($queryresult->result_array()) {
$temp = $this->plot($queryresult->result_array(), $gridsquare, $measurement_base);
$result = $this->mergeresult($result, $temp);
}
}
}
if ($result) {
header('Content-Type: application/json');
echo json_encode($result);
}
else {
header('Content-Type: application/json');
echo json_encode(array('Error' => 'No QSOs found to plot.'));
}
}
/*
* We merge the result from several station_id's. They can have different gridsquares, so we need to use the correct gridsquare to calculate the correct distance.
*/
function mergeresult($result, $add) {
if (sizeof($result) > 0) {
if ($result['qrb']['Distance'] < $add['qrb']['Distance']) {
$result['qrb']['Distance'] = $add['qrb']['Distance'];
$result['qrb']['Grid'] = $add['qrb']['Grid'];
$result['qrb']['Callsign'] = $add['qrb']['Callsign'];
}
$result['qrb']['Qsos'] += $add['qrb']['Qsos'];
for ($i = 0; $i <= 399; $i++) {
if(isset($result['qsodata'][$i]['count'])) {
$result['qsodata'][$i]['count'] += $add['qsodata'][$i]['count'];
}
if(isset($result['qsodata'][$i]['callcount'])) {
if ($result['qsodata'][$i]['callcount'] < 5 && $add['qsodata'][$i]['callcount'] > 0) {
$calls = explode(',', $add['qsodata'][$i]['calls']);
foreach ($calls as $c) {
if ($result['qsodata'][$i]['callcount'] < 5) {
if ($result['qsodata'][$i]['callcount'] > 0) {
$result['qsodata'][$i]['calls'] .= ', ';
}
$result['qsodata'][$i]['calls'] .= $c;
$result['qsodata'][$i]['callcount']++;
}
}
}
}
}
return $result;
}
return $add;
}
/*
* Fetches the gridsquare from the station_id
*/
function find_gridsquare($station_id) {
$this->db->where('station_id', $station_id);
$result = $this->db->get('station_profile')->row_array();
if ($result) {
return $result['station_gridsquare'];
}
return null;
}
// This functions takes query result from the database and extracts grids from the qso,
// then calculates distance between homelocator and locator given in qso.
// It builds an array, which has 50km intervals, then inputs each length into the correct spot
// The function returns a json-encoded array.
function plot($qsoArray, $gridsquare, $measurement_base) {
$stationgrid = strtoupper($gridsquare[0]); // We use only the first entered gridsquare from the active profile
if (strlen($stationgrid) == 4) $stationgrid .= 'MM'; // adding center of grid if only 4 digits are specified
switch ($measurement_base) {
case 'M':
$unit = "mi";
$dist = '13000';
break;
case 'K':
$unit = "km";
$dist = '20000';
break;
case 'N':
$unit = "nmi";
$dist = '11000';
break;
default:
$unit = "km";
$dist = '20000';
}
if (!$this->valid_locator($stationgrid)) {
header('Content-Type: application/json');
echo json_encode(array('Error' => 'Error. There is a problem with the gridsquare set in your profile!'));
exit;
}
else {
// Making the array we will use for plotting, we save occurrences of the length of each qso in the array
$j = 0;
for ($i = 0; $j < $dist; $i++) {
$dataarray[$i]['dist'] = $j . $unit . ' - ' . ($j + 50) . $unit;
$dataarray[$i]['count'] = 0;
$dataarray[$i]['calls'] = '';
$dataarray[$i]['callcount'] = 0;
$j += 50;
}
$qrb = array ( // Used for storing the QSO with the longest QRB
'Callsign' => '',
'Grid' => '',
'Distance' => '',
'Qsos' => '',
'Grids' => ''
);
foreach ($qsoArray as $qso) {
$qrb['Qsos']++; // Counts up number of qsos
$bearingdistance = $this->bearing_dist($stationgrid, $qso['grid'], $measurement_base); // Calculates distance based on grids
$arrayplacement = (int)($bearingdistance / 50); // Resolution is 50, calculates where to put result in array
if ($bearingdistance > $qrb['Distance']) { // Saves the longest QSO
$qrb['Distance'] = $bearingdistance;
$qrb['Callsign'] = $qso['callsign'];
$qrb['Grid'] = $qso['grid'];
}
$dataarray[$arrayplacement]['count']++; // Used for counting total qsos plotted
if ($dataarray[$arrayplacement]['callcount'] < 5) { // Used for tooltip in graph, set limit to 5 calls shown
if ($dataarray[$arrayplacement]['callcount'] > 0) {
$dataarray[$arrayplacement]['calls'] .= ', ';
}
$dataarray[$arrayplacement]['calls'] .= $qso['callsign'];
$dataarray[$arrayplacement]['callcount']++;
}
}
$data['ok'] = 'OK';
$data['qrb'] = $qrb;
$data['qsodata'] = $dataarray;
$data['unit'] = $unit;
return $data;
}
}
/*
* Checks the validity of the locator
* Input: locator
* Returns: bool
*/
function valid_locator ($loc) {
$regex = '^[A-R]{2}[0-9]{2}[A-X]{2}$';
if (preg_match("%{$regex}%i", $loc)) {
return true;
}
else {
return false;
}
}
/*
* Converts locator to latitude and longitude
* Input: locator
* Returns: array with longitude and latitude
*/
function loc_to_latlon ($loc) {
/* lat */
$l[0] =
(ord(substr($loc, 1, 1))-65) * 10 - 90 +
(ord(substr($loc, 3, 1))-48) +
(ord(substr($loc, 5, 1))-65) / 24 + 1/48;
$l[0] = $this->deg_to_rad($l[0]);
/* lon */
$l[1] =
(ord(substr($loc, 0, 1))-65) * 20 - 180 +
(ord(substr($loc, 2, 1))-48) * 2 +
(ord(substr($loc, 4, 1))-65) / 12 + 1/24;
$l[1] = $this->deg_to_rad($l[1]);
return $l;
}
function deg_to_rad ($deg) {
return (M_PI * $deg/180);
}
function bearing_dist($loc1, $loc2, $measurement_base) {
$loc1 = strtoupper($loc1);
$loc2 = strtoupper($loc2);
if (strlen($loc1) == 4) $loc1 .= 'MM';
if (strlen($loc2) == 4) $loc2 .= 'MM';
if (!$this->valid_locator($loc1) || !$this->valid_locator($loc2)) {
return 0;
}
$l1 = $this->loc_to_latlon($loc1);
$l2 = $this->loc_to_latlon($loc2);
$co = cos($l1[1] - $l2[1]) * cos($l1[0]) * cos($l2[0]) + sin($l1[0]) * sin($l2[0]);
$ca = atan2(sqrt(1 - $co*$co), $co);
switch ($measurement_base) {
case 'M':
return ceil(6371*$ca/1.609344);
case 'K':
return ceil(6371*$ca);
case 'N':
return ceil(6371*$ca/1.852);
default:
return ceil(6371*$ca);
}
}
/*
* Used to fetch QSOs from the logbook in the awards
*/
public function qso_details($distance, $band, $sat){
$distarray = $this->getdistparams($distance);
$CI =& get_instance();
$CI->load->model('logbooks_model');
$logbooks_locations_array = $CI->logbooks_model->list_logbook_relationships($this->session->userdata('active_station_logbook'));
$this->db->join('station_profile', 'station_profile.station_id = '.$this->config->item('table_name').'.station_id');
$this->db->join('dxcc_entities', 'dxcc_entities.adif = '.$this->config->item('table_name').'.COL_DXCC', 'left outer');
$this->db->join('lotw_users', 'lotw_users.callsign = '.$this->config->item('table_name').'.col_call', 'left outer');
$this->db->where('COL_DISTANCE >=', $distarray[0]);
$this->db->where('COL_DISTANCE <=', $distarray[1]);
$this->db->where('LENGTH(col_gridsquare) >', 0);
$this->db->where_in($this->config->item('table_name').'.station_id', $logbooks_locations_array);
if ($band != 'All') {
if($band != "sat") {
$this->db->where('COL_PROP_MODE !=', 'SAT');
$this->db->where('COL_BAND', $band);
} else {
$this->db->where('COL_PROP_MODE', "SAT");
if ($sat != 'All') {
$this->db->where('COL_SAT_NAME', $sat);
}
}
}
$this->db->order_by("COL_TIME_ON", "desc");
return $this->db->get($this->config->item('table_name'));
}
function getdistparams($distance) {
$temp = explode('-', $distance);
$regex = '[a-zA-Z]+';
preg_match("%{$regex}%i", $temp[0], $unit);
$result = [];
$result[0] = filter_var($temp[0], FILTER_SANITIZE_NUMBER_INT);
$result[1] = filter_var($temp[1], FILTER_SANITIZE_NUMBER_INT);
if ($unit[0] == 'mi') {
$result[0] *= 1.609344;
$result[1] *= 1.609344;
}
if ($unit[0] == 'nmi') {
$result[0] *= 1.852;
$result[1] *= 1.852;
}
return $result;
}
}