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Editing: plugin-installer.php

<?php
namespace Elementor\Modules\ProInstall;

class Plugin_Installer {

private $plugin_slug;
	private $package_url;

public function __construct( $plugin_slug, $package_url = null ) {
		$this->plugin_slug = $plugin_slug;
		$this->package_url = $package_url;
	}

public function install() {
		$this->includes_dependencies();

$plugin_data = $this->get_plugin_path();
		if ( empty( $plugin_data ) ) {
			$install_result = $this->do_install();
			if ( null === $install_result || is_wp_error( $install_result ) ) {
				return new \WP_Error( 'cant_installed', esc_html__( 'There are no available subscriptions at the moment.', 'elementor' ) );
			}
		}

$is_activated = $this->activate();
		if ( is_wp_error( $is_activated ) ) {
			return $is_activated;
		}

return true;
	}

private function get_package_url() {
		return $this->package_url;
	}

private function includes_dependencies() {
		include_once ABSPATH . '/wp-admin/includes/admin.php';
		include_once ABSPATH . '/wp-admin/includes/plugin-install.php';
		include_once ABSPATH . '/wp-admin/includes/plugin.php';
		include_once ABSPATH . '/wp-admin/includes/class-wp-upgrader.php';
		include_once ABSPATH . '/wp-admin/includes/class-plugin-upgrader.php';
	}

private function do_install() {
		$package_url = $this->get_package_url();
		if ( empty( $package_url ) ) {
			return new \WP_Error( 'no_package_url', sprintf( 'The requested plugin `%s` has no package URL', $this->plugin_slug ) );
		}

$upgrader = new \Plugin_Upgrader( new \Automatic_Upgrader_Skin() );

return $upgrader->install( $package_url );
	}

private function get_plugin_path() {
		$plugins = get_plugins();
		$installed_plugins = [];

foreach ( $plugins as $path => $plugin ) {
			$path_parts = explode( '/', $path );
			$slug = $path_parts[0];
			$installed_plugins[ $slug ] = $path;
		}

if ( empty( $installed_plugins[ $this->plugin_slug ] ) ) {
			return false;
		}

return $installed_plugins[ $this->plugin_slug ];
	}

public function activate() {
		$plugin_path = $this->get_plugin_path();

if ( ! $plugin_path ) {
			return new \WP_Error( 'no_installed', sprintf( 'The requested plugin `%s` is not installed', $this->plugin_slug ) );
		}

$activate_result = activate_plugin( $plugin_path );

if ( is_wp_error( $activate_result ) ) {
			return $activate_result;
		}

return true;
	}
}

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