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Editing: Loader.php

<?php

namespace WPForms\Providers;

/**
 * Class Loader gives ability to track/load all providers.
 *
 * @since 1.4.7
 */
class Loader {

/**
	 * Get the instance of a class and store it in itself.
	 * Later we will be able to use this class as $providers_loader = \WPForms\Providers\Loader::get_instance();
	 *
	 * @since 1.4.7
	 */
	public static function get_instance() {

static $instance;

if ( ! $instance ) {
			$instance = new Loader();
		}

return $instance;
	}

/**
	 * Loader constructor.
	 *
	 * @since 1.4.7
	 */
	public function __construct() {
	}

/**
	 * Register a provider.
	 *
	 * @since 1.4.7
	 *
	 * @param \WPForms\Providers\Provider\Core $provider The core class of a single provider.
	 */
	public function register( Provider\Core $provider ) {

\add_filter( 'wpforms_providers_available', array( $provider, 'register_provider' ) );

// WPForms > Settings > Integrations page.
		$integration = $provider->get_page_integrations();
		if ( null !== $integration ) {
			\add_action( 'wpforms_settings_providers', array( $integration, 'display' ), $provider::PRIORITY, 2 );
		}

// Editing Single Form > Form Builder.
		$form_builder = $provider->get_form_builder();
		if ( null !== $form_builder ) {
			\add_action( 'wpforms_providers_panel_sidebar', array( $form_builder, 'display_sidebar' ), $provider::PRIORITY );
			\add_action( 'wpforms_providers_panel_content', array( $form_builder, 'display_content' ), $provider::PRIORITY );
		}

// Process entry submission.
		$process = $provider->get_process();
		if ( null !== $process ) {
			\add_action( 'wpforms_process_complete', array( $process, 'process' ), 5, 4 );
		}
	}

}

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