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wp-content/plugins/debloat/inc/optimize-js/script.php

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+<?php
+
+namespace Sphere\Debloat\OptimizeJs;
+
+use Sphere\Debloat\Util;
+use Sphere\Debloat\Base\Asset;
+
+/**
+ * Class for handling scripts.
+ * 
+ * @author  asadkn
+ * @since   1.0.0
+ */
+class Script extends Asset
+{
+	public $defer = false;
+	public $async = false;
+	public $delay = false;
+
+	/**
+	 * Dependencies to mirror from core script.
+	 *
+	 * @var array
+	 */
+	public $deps = [];
+
+	/**
+	 * Inner content for inline scripts
+	 *
+	 * @var string
+	 */
+	public $content = '';
+
+	/**
+	 * @var array
+	 */
+	public $attrs = [];
+
+	/**
+	 * Original HTML tag.
+	 */
+	public $orig_html = '';
+
+	/**
+	 * Whether the script is dirty and needs rendering.
+	 *
+	 * @var boolean
+	 */
+	public $render = false;
+
+	/**
+	 * @var callable|null
+	 */
+	protected $minifier;
+
+	public function __construct(string $id, string $url = '', string $orig_html = '')
+	{
+		$this->id = $id;
+		$this->url = $url;
+		$this->orig_url  = $url;
+		$this->orig_html = $orig_html;
+
+		if (!$this->id) {
+			$this->id = md5($this->url ?: uniqid('debloat_script', true));
+		}
+
+		// Has to be processed early as it might have to be searched for things like defer.
+		$this->process_content();
+	}
+
+	/**
+	 * Factory method: Create an instance provided an HTML tag.
+	 *
+	 * @param string $tag
+	 * @return boolean|self
+	 */
+	public static function from_tag(string $tag)
+	{
+		$attrs = Util\parse_attrs($tag);
+
+		// Only process scripts of type javascript or missing type (assumed JS by browser).
+		if (isset($attrs['type']) && strpos($attrs['type'], 'javascript') === false) {
+			return false;
+		}
+
+		$script = new self($attrs['id'] ?? '', $attrs['src'] ?? '', $tag);
+
+		// Note: We keep 'id' just in case if there was an original id.
+		$script->attrs = \array_diff_key($attrs, array_flip(['src', 'defer', 'async']));
+		
+		if (isset($attrs['defer'])) {
+			$script->defer = true;
+		}
+
+		if (isset($attrs['async'])) {
+			$script->async = true;
+		}
+
+		return $script;
+	}
+
+	/**
+	 * Render the HTML.
+	 *
+	 * @return string
+	 */
+	public function render()
+	{
+		// Add src if available.
+		if ($this->url) {
+			$this->attrs += [
+				'src' => $this->get_content_url(),
+				'id'  => $this->id,
+			];
+		}
+
+		$this->process_delay();
+
+		// Setting local to avoid mutating.
+		$content = $this->content;
+
+		if (!$this->url && $content && is_callable($this->minifier)) {
+			$content = call_user_func($this->minifier, $content);
+		}
+
+		// Add defer for external scripts. For inline scripts, use data uri in src.
+		if ($this->defer) {
+			$this->attrs['defer'] = true;
+		
+			if (!$this->url) {
+				$this->attrs['src'] = 'data:text/javascript;base64,' . base64_encode($content);
+				$content = '';
+			}
+		}
+
+		if ($this->async) {
+			$this->attrs['async'] = true;
+		}
+
+		$render_atts = implode(' ', $this->render_attrs($this->attrs));
+		$new_tag = sprintf(
+			'<script%1$s>%2$s</script>',
+			$render_atts ? " $render_atts" : '',
+			!$this->url ? $content : ''
+		);
+
+		return $new_tag;
+	}
+
+	/**
+	 * Set the inner content, if any.
+	 *
+	 * @return void
+	 */
+	public function process_content()
+	{
+		if (!$this->url) {
+			$this->content = preg_replace('#<script[^>]*>(.+?)</script>\s*$#is', '\\1', $this->orig_html);
+		}
+	}
+
+	/**
+	 * Set a callable minifier function.
+	 *
+	 * @param callable $minifier
+	 * @return void
+	 */
+	public function set_minifier($minifier) 
+	{
+		$this->minifier = $minifier;
+	}
+
+	/**
+	 * Process and add delayed script attributes if needed.
+	 *
+	 * @return void
+	 */
+	public function process_delay()
+	{
+		if (!$this->delay) {
+			return;
+		}
+
+		// Defer / async shouldn't be enabled anymore. Delay load logic implies deferred anyways.
+		$this->defer = false;
+		$this->async = false;
+
+		// Add delay.
+		$this->attrs['data-debloat-delay'] = 1;
+
+		// Normal script with a URL.
+		if (!empty($this->attrs['src'])) { 
+			$this->attrs['data-src'] = $this->attrs['src'];
+		}
+		// Inline script with content.
+		elseif ($this->content) {
+
+			if (!empty($this->attrs['type'])) {
+				$this->attrs['data-type'] = $this->attrs['type'];
+			}
+
+			$this->attrs['type'] = 'text/debloat-script';
+		}
+
+		unset($this->attrs['src']);
+	}
+
+}