259 行
8.7 KiB
PHP
259 行
8.7 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++) {
|
|
$result['qsodata'][$i]['count'] += $add['qsodata'][$i]['count'];
|
|
|
|
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!'));
|
|
}
|
|
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 = $bearingdistance / 50; // Resolution is 50, calculates where to put result in array
|
|
if ($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 round(6371*$ca/1.609344);
|
|
case 'K':
|
|
return round(6371*$ca);
|
|
case 'N':
|
|
return round(6371*$ca/1.852);
|
|
default:
|
|
return round(6371*$ca);
|
|
}
|
|
}
|
|
}
|