Asynchronous control rendering trait + js for instant loading

.gitignore

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+/vendor
+/composer.lock
+/composer.phar

Makefile

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+run-tests:
+	make composer.phar
+	php composer.phar install --no-interaction
+	vendor/bin/phpstan analyse -l 5 src
+
+composer.phar:
+	# Download Composer https://getcomposer.org/download/
+	php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+	php composer-setup.php
+	php -r "unlink('composer-setup.php');"

README.md

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-# AsyncControl
+# AsyncControl
+
+Trait for asynchronous control rendering.
+
+## Usage
+
+### Trait
+
+```php
+<?php
+class CommentsControl extends Nette\Application\UI\Control {
+
+	use Pd\AsyncControl\UI\AsyncControlTrait;
+
+	public function render() {
+		//control rendering
+	}
+}
+```
+
+If you want to call different method than `render` set custom render callback:
+
+```php
+<?php
+$this->setAsyncRenderer([$this, 'customRender']);
+//or
+$this->setAsyncRenderer(function () {
+	//control rendering
+});
+```
+
+### Template
+
+```latte
+{control comments:async}
+```
+
+or with custom message
+
+```latte
+{control comments:async 'Show comments'}
+```
+
+## Configuring
+
+You can set default message and attributes used for loading link in `bootstrap.php`
+
+```php
+<?php
+Pd\AsyncControl\UI\AsyncControlLink::setDefault('Load content', ['class' => ['btn', 'ajax']]);
+```
+
+or in application setup
+
+```neon
+services:
+	application:
+		setup:
+			- Pd\AsyncControl\UI\AsyncControlLink::setDefault('Load content', {class: [btn, ajax]})
+```

bower.json

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+{
+	"name": "async.nette.ajax.js",
+	"homepage": "https://github.com/peckadesign/AsyncControl",
+	"authors": [
+		"PeckaDesign <[email protected]>",
+		"Vít Kutný <[email protected]>"
+	],
+	"main": "src/assets/async.nette.ajax.js",
+	"license": "MIT",
+	"dependencies": {
+		"jquery": ">=1.7",
+		"nette.ajax.js": ">=2.0"
+	}
+}

composer.json

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+{
+	"name": "pd/async-control",
+	"description": "Trait for asynchronous control rendering",
+	"keywords": [
+		"async",
+		"control",
+		"nette"
+	],
+	"homepage": "https://github.com/peckadesign/AsyncControl",
+	"license": [
+		"MIT"
+	],
+	"authors": [
+		{
+			"name": "PeckaDesign",
+			"homepage": "http://www.peckadesign.cz"
+		},
+		{
+			"name": "Vít Kutný",
+			"homepage": "https://github.com/vitkutny"
+		}
+	],
+	"require": {
+		"php": "~7.0",
+		"nette/application": "^2.2"
+	},
+	"require-dev": {
+		"phpstan/phpstan": "~0.6.0"
+	},
+	"autoload": {
+		"psr-4": {
+			"Pd\\AsyncControl\\": "src/"
+		}
+	}
+}

src/UI/AsyncControlLink.php

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+<?php declare(strict_types = 1);
+
+namespace Pd\AsyncControl\UI;
+
+final class AsyncControlLink
+{
+
+	private static $defaultMessage = 'Load content';
+	private static $defaultAttributes = [];
+	/**
+	 * @var string
+	 */
+	private $message;
+	/**
+	 * @var array
+	 */
+	private $attributes;
+
+
+	public function __construct(
+		string $message = NULL,
+		array $attributes = NULL
+	) {
+		$this->message = $message === NULL ? self::$defaultMessage : $message;
+		$this->attributes = $attributes === NULL ? self::$defaultAttributes : $attributes;
+	}
+
+
+	public static function setDefault(string $message, array $attributes = [])
+	{
+		self::$defaultMessage = $message;
+		self::$defaultAttributes = $attributes;
+	}
+
+
+	public function getMessage(): string
+	{
+		return $this->message;
+	}
+
+
+	public function getAttributes(): array
+	{
+		return $this->attributes;
+	}
+}

src/UI/AsyncControlTrait.php

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+<?php declare(strict_types = 1);
+
+namespace Pd\AsyncControl\UI;
+
+use Nette\Application\UI\Control;
+use Nette\Application\UI\Presenter;
+use Nette\Application\UI\PresenterComponent;
+
+
+/**
+ * @method render
+ */
+trait AsyncControlTrait
+{
+
+	/**
+	 * @var callable
+	 */
+	protected $asyncRenderer;
+
+
+	public function handleAsyncLoad()
+	{
+		if ( ! $this instanceof PresenterComponent || ! ($presenter = $this->getPresenter(FALSE)) || ! $presenter->isAjax()) {
+			return;
+		}
+		ob_start(function () {
+		});
+		try {
+			$this->renderAsync();
+		} catch (\Throwable $e) {
+			ob_end_clean();
+			throw $e;
+		} catch (\Exception $e) {
+			ob_end_clean();
+			throw $e;
+		}
+		$content = ob_get_clean();
+		$presenter->getPayload()->snippets[$this->getSnippetId('async')] = $content;
+		$presenter->sendPayload();
+	}
+
+
+	public function renderAsync(string $linkMessage = NULL, array $linkAttributes = NULL)
+	{
+		if ($this instanceof Control && strpos((string) $this->getPresenter()->getParameter(Presenter::SIGNAL_KEY), sprintf('%s-', $this->getUniqueId())) !== 0) {
+			$template = $this->createTemplate();
+			$template->link = new AsyncControlLink($linkMessage, $linkAttributes);
+			$template->setFile(__DIR__ . '/templates/asyncLoadLink.latte');
+			$template->render();
+		} elseif (is_callable($this->asyncRenderer)) {
+			call_user_func($this->asyncRenderer);
+		} else {
+			$this->render();
+		}
+	}
+
+
+	public function setAsyncRenderer(callable $renderer)
+	{
+		$this->asyncRenderer = $renderer;
+	}
+}

src/UI/templates/asyncLoadLink.latte

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+<div n:snippet="async">
+	<a n:href="asyncLoad!" n:attr="(expand) $link->getAttributes()" data-async>
+		{$link->getMessage()|translate}
+	</a>
+</div>

src/assets/async.nette.ajax.js

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+(function ($) {
+	$.nette.ext({
+		init: function () {
+			this.init();
+		},
+		success: function () {
+			this.init();
+		}
+	}, {
+		init: function () {
+			$('[data-async]').each(function () {
+				var $this = $(this);
+				if ($this.data('asyncInitialized')) {
+					return;
+				}
+				$this.data('asyncInitialized', true);
+				$.nette.ajax({
+					url: $this.data('asyncLink') || $this.attr('href'),
+					off: ['history', 'unique']
+				});
+			});
+		}
+	});
+})(window.jQuery);