thekid/Todo.class.php

## composer.json
{
  "require": {
    "xp-forge/handlebars-templates": "^3.1",
    "xp-forge/frontend": "^6.3",
    "xp-framework/rdbms": "^13.1",
    "php": ">=8.0.0",
    "ext-sqlite3": "*"
  },
  "scripts": {
    "dev": "xp -supervise web -m develop Todo",
    "serve": "xp -supervise web Todo",
    "post-update-cmd": "xp bundle"
  }
}

## package.json
{
  "dependencies": {
    "htmx.org": "^1.9"
  },
  "bundles": {
    "vendor": {"htmx.org": ["dist/htmx.min.js"], "fonts://display=swap": "Lato:wght@300"}
  }
}

## Todo.class.php
<?php

use rdbms\DriverManager;
use web\Application;
use web\frontend\{Frontend, AssetsFrom, Handlebars, Get, Post, Delete, Put, View, Param};

class Todo extends Application {

  public function routes() {
    $db= $this->environment->path('todos.db');
    $conn= DriverManager::getConnection("sqlite://./{$db->name()}");

    if (!$db->exists()) {
      $conn->query('create table todo (
        id integer primary key,
        description text,
        completed integer,
        created datetime default CURRENT_TIMESTAMP
      )');
      $conn->insert('into todo (description, completed) values ("Welcome 👋", 0)');
    }

    $impl= new class($conn) {
      public function __construct(private $conn) { }

      /** Renders a given TODO */
      private function render(int $id, string $view= 'item'): View {
        $todo= $this->conn->query('select * from todo where id = %d', $id)->next();
        return View::named('todo')->fragment($view)->with($todo);
      }

      #[Get]
      public function list() {
        return View::named('todo')->with(['todos' => $this->conn->select('* from todo')]);
      }

      #[Post('/todos')]
      public function create(#[Param] string $description, #[Param] bool $completed= false) {
        $this->conn->insert(
          'into todo (description, completed) values (%s, %d)',
          $description,
          $completed
        );
        return $this->render($this->conn->identity());
      }

      #[Get('/todos/{id}')]
      public function view(int $id) {
        return $this->render($id);
      }

      #[Delete('/todos/{id}')]
      public function remove(int $id) {
        $this->conn->delete('from todo where id = %d', $id);
        return View::empty()->status(202);
      }

      #[Get('/todos/{id}/edit')]
      public function edit(int $id) {
        return $this->render($id, 'edit');
      }

      #[Put('/todos/{id}/completed')]
      public function complete(int $id) {
        $this->conn->update('todo set completed = 1 where id = %d', $id);
        return $this->render($id);
      }

      #[Put('/todos/{id}/description')]
      public function rename(int $id, #[Param] string $description) {
        $this->conn->update('todo set description = %s where id = %d', $description, $id);
        return $this->render($id);
      }
    };
    return [
      '/static' => new AssetsFrom($this->environment->webroot()),
      '/'       => new Frontend($impl, new Handlebars('.'))
    ];
  }
}

## todo.handlebars
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>TODOs</title>
  <link href="/static/vendor.css" rel="stylesheet">
  <link href="https://avatars.githubusercontent.com/u/1721237?s=48&v=4" rel="icon">
  <style type="text/css">
    * {
      font-family: 'Lato', sans-serif;
    }

    form {
      display: flex;
      flex-direction: column;
      width: max-content;
      align-items: flex-start;
      gap: 1rem;
    }

    input[type='text'] {
      padding: .25rem;
    }

    button[type='submit'] {
      padding: .25rem .5rem;
    }

    label {
      font-weight: bold;
      display: block;
    }

    th, td {
      padding: .5rem;
    }

    tbody tr:nth-child(odd) {
      background-color: #efefef;
    }

    th {
      text-align: left;
    }

    .editable {
      cursor: pointer;
      display: block;
    }
  </style>
</head>
<body {{#with request.values.token}}hx-headers='{"X-CSRF-Token": "{{.}}"}'{{/with}}>
  <h1>TODOs 🐝</h1>
  <hr>
  <form hx-post="/todos" hx-target="#listing" hx-swap="beforeend" hx-on::after-request="this.reset()">
    <div>
      <label for="description">Description</label>
      <input type="text" name="description" size="50">
    </div>
    <div>
      <label for="completed">Completed</label>
      <input type="checkbox" name="completed" value="true">
    </div>
    <button type="submit">Save</button>
  </form>
  <hr>

  <table width="100%">
    <thead>
      <tr><th width="50%">Description</th><th>Created</th><th>Completed</th><th>Actions</th></tr>
    </thead>
    <tbody id="listing">
      {{#each todos}}
        {{#*fragment "item"}}
          <tr>
            <td>
              <span class="editable" hx-get="/todos/{{id}}/edit" hx-target="this" hx-swap="outerHTML">
                {{description}}
              </span>
            </td>
            <td>{{created}}</td>
            <td>{{#if completed}}✅{{/if}}</td>
            <td>
              {{#unless completed}}
                <button hx-put="/todos/{{id}}/completed" hx-target="closest tr" hx-swap="outerHTML">Complete</button>
              {{/unless}}
              <button hx-delete="/todos/{{id}}" hx-target="closest tr" hx-swap="delete">Delete</button>
            </td>
          </tr>
        {{/fragment}}
      {{/each}}
    </tbody>
  </table>

  {{#*inline "edit"}}
    <form hx-put="/todos/{{id}}/description" hx-target="closest tr" hx-swap="outerHTML">
      <div>
        <input type="text" name="description" size="50" value="{{description}}">
        <button type="submit">💾</button>
        <button type="cancel" hx-get="/todos/{{id}}">x</button>
      </div>
    </form>
  {{/inline}}

  <script src="/static/vendor.js"></script>
</body>
</html>
	{
	"require": {
	"xp-forge/handlebars-templates": "^3.1",
	"xp-forge/frontend": "^6.3",
	"xp-framework/rdbms": "^13.1",
	"php": ">=8.0.0",
	"ext-sqlite3": "*"
	},
	"scripts": {
	"dev": "xp -supervise web -m develop Todo",
	"serve": "xp -supervise web Todo",
	"post-update-cmd": "xp bundle"
	}
	}
	{
	"dependencies": {
	"htmx.org": "^1.9"
	},
	"bundles": {
	"vendor": {"htmx.org": ["dist/htmx.min.js"], "fonts://display=swap": "Lato:wght@300"}
	}
	}
	<?php

	use rdbms\DriverManager;
	use web\Application;
	use web\frontend\{Frontend, AssetsFrom, Handlebars, Get, Post, Delete, Put, View, Param};

	class Todo extends Application {

	public function routes() {
	$db= $this->environment->path('todos.db');
	$conn= DriverManager::getConnection("sqlite://./{$db->name()}");

	if (!$db->exists()) {
	$conn->query('create table todo (
	id integer primary key,
	description text,
	completed integer,
	created datetime default CURRENT_TIMESTAMP
	)');
	$conn->insert('into todo (description, completed) values ("Welcome 👋", 0)');
	}

	$impl= new class($conn) {
	public function __construct(private $conn) { }

	/** Renders a given TODO */
	private function render(int $id, string $view= 'item'): View {
	$todo= $this->conn->query('select * from todo where id = %d', $id)->next();
	return View::named('todo')->fragment($view)->with($todo);
	}

	#[Get]
	public function list() {
	return View::named('todo')->with(['todos' => $this->conn->select('* from todo')]);
	}

	#[Post('/todos')]
	public function create(#[Param] string $description, #[Param] bool $completed= false) {
	$this->conn->insert(
	'into todo (description, completed) values (%s, %d)',
	$description,
	$completed
	);
	return $this->render($this->conn->identity());
	}

	#[Get('/todos/{id}')]
	public function view(int $id) {
	return $this->render($id);
	}

	#[Delete('/todos/{id}')]
	public function remove(int $id) {
	$this->conn->delete('from todo where id = %d', $id);
	return View::empty()->status(202);
	}

	#[Get('/todos/{id}/edit')]
	public function edit(int $id) {
	return $this->render($id, 'edit');
	}

	#[Put('/todos/{id}/completed')]
	public function complete(int $id) {
	$this->conn->update('todo set completed = 1 where id = %d', $id);
	return $this->render($id);
	}

	#[Put('/todos/{id}/description')]
	public function rename(int $id, #[Param] string $description) {
	$this->conn->update('todo set description = %s where id = %d', $description, $id);
	return $this->render($id);
	}
	};
	return [
	'/static' => new AssetsFrom($this->environment->webroot()),
	'/' => new Frontend($impl, new Handlebars('.'))
	];
	}
	}
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title>TODOs</title>
	<link href="/static/vendor.css" rel="stylesheet">
	<link href="https://avatars.githubusercontent.com/u/1721237?s=48&v=4" rel="icon">
	<style type="text/css">
	* {
	font-family: 'Lato', sans-serif;
	}

	form {
	display: flex;
	flex-direction: column;
	width: max-content;
	align-items: flex-start;
	gap: 1rem;
	}

	input[type='text'] {
	padding: .25rem;
	}

	button[type='submit'] {
	padding: .25rem .5rem;
	}

	label {
	font-weight: bold;
	display: block;
	}

	th, td {
	padding: .5rem;
	}

	tbody tr:nth-child(odd) {
	background-color: #efefef;
	}

	th {
	text-align: left;
	}

	.editable {
	cursor: pointer;
	display: block;
	}
	</style>
	</head>
	<body {{#with request.values.token}}hx-headers='{"X-CSRF-Token": "{{.}}"}'{{/with}}>
	<h1>TODOs 🐝</h1>
	<hr>
	<form hx-post="/todos" hx-target="#listing" hx-swap="beforeend" hx-on::after-request="this.reset()">
	<div>
	<label for="description">Description</label>
	<input type="text" name="description" size="50">
	</div>
	<div>
	<label for="completed">Completed</label>
	<input type="checkbox" name="completed" value="true">
	</div>
	<button type="submit">Save</button>
	</form>
	<hr>

	<table width="100%">
	<thead>
	<tr><th width="50%">Description</th><th>Created</th><th>Completed</th><th>Actions</th></tr>
	</thead>
	<tbody id="listing">
	{{#each todos}}
	{{#*fragment "item"}}
	<tr>
	<td>
	<span class="editable" hx-get="/todos/{{id}}/edit" hx-target="this" hx-swap="outerHTML">
	{{description}}
	</span>
	</td>
	<td>{{created}}</td>
	<td>{{#if completed}}✅{{/if}}</td>
	<td>
	{{#unless completed}}
	<button hx-put="/todos/{{id}}/completed" hx-target="closest tr" hx-swap="outerHTML">Complete</button>
	{{/unless}}
	<button hx-delete="/todos/{{id}}" hx-target="closest tr" hx-swap="delete">Delete</button>
	</td>
	</tr>
	{{/fragment}}
	{{/each}}
	</tbody>
	</table>

	{{#*inline "edit"}}
	<form hx-put="/todos/{{id}}/description" hx-target="closest tr" hx-swap="outerHTML">
	<div>
	<input type="text" name="description" size="50" value="{{description}}">
	<button type="submit">💾</button>
	<button type="cancel" hx-get="/todos/{{id}}">x</button>
	</div>
	</form>
	{{/inline}}

	<script src="/static/vendor.js"></script>
	</body>
	</html>