<?phpnamespace App\Ui;use App\Main;use App\Tasks;use Symfony\Component\Tui\Event\CancelEvent;use Symfony\Component\Tui\Event\SelectEvent;use Symfony\Component\Tui\Event\SubmitEvent;use Symfony\Component\Tui\Terminal\TerminalInterface;use Symfony\Component\Tui\Tui;use Symfony\Component\Tui\Widget\InputWidget;use Symfony\Component\Tui\Widget\SelectListWidget;use Symfony\Component\Tui\Widget\TextWidget;/** * The full-screen screen (symfony/tui): the tasks in a list (arrows, Enter: done / not done, d: delete), a field to * add one (a), q or Ctrl+C to quit. Tests drive it on a VirtualTerminal (tests/TaskScreenTest.php). */final class TaskScreen{ public readonly Tui $tui; /** this console's own screen: the screen takes the whole terminal (its alternate screen), as vim or htop do */ private bool $fullScreen; private SelectListWidget $list; private ?InputWidget $input = null; private TextWidget $help; /** @param TerminalInterface|null $terminal null: this console's (WindowsTerminal::create()) */ public function __construct(private Tasks $tasks, ?TerminalInterface $terminal = null) { $this->fullScreen = $terminal === null; $this->tui = new Tui(terminal: $terminal ?? WindowsTerminal::create()); $this->list = new SelectListWidget([], 12); $this->help = new TextWidget(); $this->tui->add(new TextWidget(Main::title()))->add($this->list)->add($this->help); // the list: its own keys (arrows, Enter), plus a / d / q $this->list->onInput(function (string $data): bool { return match ($data) { 'a' => $this->startAdding(), 'd' => $this->removeSelected(), 'q', "\x03" => $this->quit(), default => false, }; }); $this->list->onSelect(fn (SelectEvent $e) => $this->toggle((int)$e->getValue())); $this->refresh(); $this->tui->setFocus($this->list); } public function run(): void { if ($this->fullScreen) { fwrite(STDOUT, "\e[?1049h\e[2J\e[H"); // the alternate screen, cleared; the terminal comes back as it was after } try { $this->tui->run(); } finally { if ($this->fullScreen) { fwrite(STDOUT, "\e[?1049l"); } } } private function refresh(int $select = -1): void { $items = []; foreach ($this->tasks->all() as $i => $task) { $items[] = ['value' => (string)($i + 1), 'label' => ($task['done'] ? '[x] ' : '[ ] ') . $task['text']]; } $this->list->setItems($items ?: [['value' => '0', 'label' => '(no task yet: press a)']]); if ($select >= 0) { $this->list->setSelectedIndex($select); } $done = count(array_filter($this->tasks->all(), fn ($t) => $t['done'])); $this->help->setText(sprintf('%d / %d done ↑↓ move · Enter done · a add · d delete · q quit', $done, count($this->tasks->all()))); } private function toggle(int $n): void { if ($n > 0) { $this->tasks->toggle($n); $this->refresh($n - 1); } } private function removeSelected(): bool { $n = (int)($this->list->getSelectedItem()['value'] ?? 0); if ($n > 0) { $this->tasks->remove($n); $this->refresh(max(0, $n - 2)); } return true; } /** * The field to add a task: a new one each time (a widget removed from the Tui loses its listeners, so the same * field added again would not hear Enter any more). */ private function startAdding(): bool { $this->input = new InputWidget(); $this->input->setPrompt('New task: '); $this->input->onSubmit(function (SubmitEvent $e): void { if (trim($e->getValue()) !== '') { $this->tasks->add($e->getValue()); } $this->stopAdding(); }); $this->input->onCancel(fn (CancelEvent $e) => $this->stopAdding()); $this->tui->add($this->input); $this->tui->setFocus($this->input); return true; } private function stopAdding(): void { if ($this->input !== null) { $this->tui->remove($this->input); $this->input = null; } $this->refresh(count($this->tasks->all()) - 1); $this->tui->setFocus($this->list); } private function quit(): bool { $this->tui->stop(); return true; }}