How call php function using Ajax from Twig template - php

Question

I took over an app built on Twig 3 template, Bootstrap 3 framework. My knowledge is minimal. I have to extend its functionality: use Ajax to load data from the controller in PHP, when the user changes the tab-pane. No Symfony, so as I understand no routing, no 'path'. I read so many topics but didn't find an answer.
My controller, which renders twig page:
<?php
namespace Controller;
use Entity\App\Message;
use Entity\User\Observer;
use Entity\User\Team;
class ObserverController extends Controller
{
//some other functions
//render 'druzyna.htm.twig'
public function druzynaAction()
{
if(!isset($_GET['team']))
{
header("Location:app.php");
die();
}
if (isset($_GET['year'])) {
$year=$_GET['year'];
}
else {
$year=2022;
}
$repo = $this->getRepository('User\Team');
$t = $repo->byId(intval($_GET['team']));
if(!$t)
{
header("Location:app.php");
die();
}
$repo = $this->getRepository('Sighting');
$teamsightings = $repo->TeamSightings($year, $t->getId());
$TeamObservationsStats = $repo->TeamObservationsStats($year, $t->getId());
$secretary = $t->getSecretary();
$secretary_id = $secretary->getID();
return $this->render('druzyna.htm.twig', array('team' => $t, 'secretary_id' => $secretary_id, 'teamsightings' => $teamsightings, 'year' => $year, 'TeamObservationsStats' => $TeamObservationsStats));
}
//load data via Ajax
public function druzyna_gatunki() {
//parameters
$year = $_POST['year'];
$secretary = $_POST['secretary'];
//all the sql and PDO code, which is correct
echo json_encode($gatunki);
}
In my druzyna.htm.twig file:
<script type="text/javascript">
$(document).ready(function() {
$("a[href='#tab2']").one('shown.bs.tab', function(e){
$.ajax({
type: 'POST',
url: '???',
data: ({year: {{ year }}, secretary: {{ secretary_id }}}),
dataType: 'json',
success: function (gatunki) {
//sth
}
});
});
</script>
How do I call the controller PHP file that rendered this twig page? Another problem would be t point-specific function in this PHP file, which should be impossible... (?). Should I create a new PHP file, just for this purpose, to load data to be sent via ajax? I tried it and was able to create a unique, separate PHP file, outside the twig structure. And call it from jquery, using a relative path. This solution works, but I have to create separate DB connections in PHP and would like to avoid that.

Answer 1

Francisco pointed me in a right direction. Somehow I was only thinking about specific php files.
$.ajax({
type: 'POST',
url: 'app.php?m_id=16',
data: ({
year: {{ year }},
secretary: {{ secretary_id }}
}),
dataType: 'json',
})
In AppKernel.php I added:
case 16:
$c = new Controller\ObserverController($this, DB_PREFIX);
$m = "druzyna_gatunki";
break;
Then in ObserverController
public function druzyna_gatunkiAction() {
//przekazywany parametr 'rok' i 'secretary'
$year = $_POST['year'];
$secretary = $_POST['secretary'];
$repo = $this->getRepository('Sighting');
$druzynagatunki = $repo->druzyna_gatunki($year, $secretary);
echo json_encode($druzynagatunki);
}
Which gets data from SightingRepository.
Now I have another problem, it takes 18 seconds to get data. The same query takes 6s using HeidiSQL. But I guess I would have to post separate question to solve this problem.