server.pre

<?php

use Silex\Application;
use Silex\Provider\SessionServiceProvider;
use Symfony\Component\HttpFoundation\Request;

use App\Component\AddTask;
use App\Component\Page;
use App\Component\TaskList;

$app = new Application();
$app->register(new SessionServiceProvider());

$app->get("/", (Request $request) => {
    $session = $request->getSession();

    $tasks = $session->get("tasks", []);

    return (
        <Page>
            <TaskList>{$tasks}</TaskList>
            <AddTask></AddTask>
        </Page>
    );
});

$app->post("/add", (Request $request) => {
    $session = $request->getSession();

    $id = $session->get("id", 0);
    $tasks = $session->get("tasks", []);

    $tasks[] = [
        "id" => $id++,
        "text" => $request->get("text"),
    ];

    $session->set("id", $id);
    $session->set("tasks", $tasks);

    return $app->redirect("/");
});

$app->get("/remove/{id}", (Request $request, $id) => {
    $session = $request->getSession();

    $tasks = $session->get("tasks", []);

    $tasks = array_filter($tasks, ($task) => {
        return $task["id"] !== (int) $id;
    });

    $session->set("tasks", $tasks);

    return $app->redirect("/");
});

$app->run();