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✏️ Editing: class.jetpack-json-api-plugins-install-endpoint.php

<?php

include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
include_once ABSPATH . 'wp-admin/includes/file.php';
// POST /sites/%s/plugins/%s/install
new Jetpack_JSON_API_Plugins_Install_Endpoint(
	array(
		'description'             => 'Install a plugin to your jetpack blog',
		'group'                   => '__do_not_document',
		'stat'                    => 'plugins:1:install',
		'min_version'             => '1',
		'max_version'             => '1.1',
		'method'                  => 'POST',
		'path'                    => '/sites/%s/plugins/%s/install',
		'path_labels'             => array(
			'$site'   => '(int|string) The site ID, The site domain',
			'$plugin' => '(int|string) The plugin slug to install',
		),
		'response_format'         => Jetpack_JSON_API_Plugins_Endpoint::$_response_format,
		'allow_jetpack_site_auth' => true,
		'example_request_data'    => array(
			'headers' => array(
				'authorization' => 'Bearer YOUR_API_TOKEN',
			),
		),
		'example_request'         => 'https://public-api.wordpress.com/rest/v1/sites/example.wordpress.org/plugins/akismet/install',
	)
);

new Jetpack_JSON_API_Plugins_Install_Endpoint(
	array(
		'description'             => 'Install a plugin to your jetpack blog',
		'group'                   => '__do_not_document',
		'stat'                    => 'plugins:1:install',
		'min_version'             => '1.2',
		'method'                  => 'POST',
		'path'                    => '/sites/%s/plugins/%s/install',
		'path_labels'             => array(
			'$site'   => '(int|string) The site ID, The site domain',
			'$plugin' => '(int|string) The plugin slug to install',
		),
		'response_format'         => Jetpack_JSON_API_Plugins_Endpoint::$_response_format_v1_2,
		'allow_jetpack_site_auth' => true,
		'example_request_data'    => array(
			'headers' => array(
				'authorization' => 'Bearer YOUR_API_TOKEN',
			),
		),
		'example_request'         => 'https://public-api.wordpress.com/rest/v1.2/sites/example.wordpress.org/plugins/akismet/install',
	)
);

class Jetpack_JSON_API_Plugins_Install_Endpoint extends Jetpack_JSON_API_Plugins_Endpoint {

// POST /sites/%s/plugins/%s/install
	protected $needed_capabilities = 'install_plugins';
	protected $action = 'install';

protected function install() {
		jetpack_require_lib( 'plugins' );
		$result = '';
		foreach ( $this->plugins as $index => $slug ) {
			$result = Jetpack_Plugins::install_plugin( $slug );
			if ( is_wp_error( $result ) ) {
				$this->log[ $slug ][] = $result->get_error_message();
				if ( ! $this->bulk ) {
					return $result;
				}
			}
		}

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

// No errors, install worked. Now replace the slug with the actual plugin id
		$this->plugins[$index] = Jetpack_Plugins::get_plugin_id_by_slug( $slug );

return true;
	}

protected function validate_plugins() {
		if ( empty( $this->plugins ) || ! is_array( $this->plugins ) ) {
			return new WP_Error( 'missing_plugins', __( 'No plugins found.', 'jetpack' ) );
		}

jetpack_require_lib( 'plugins' );
		foreach ( $this->plugins as $index => $slug ) {
			// make sure it is not already installed
			if ( Jetpack_Plugins::get_plugin_id_by_slug( $slug ) ) {
				return new WP_Error( 'plugin_already_installed', __( 'The plugin is already installed', 'jetpack' ) );
			}

}

return true;
	}
}

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