Automattic / jetpack

		$plugin = $request['plugin'] . '.php';

		// Is the plugin installed?

		if ( ! in_array( $plugin, array_keys( $plugins ), true ) ) {

			return new WP_Error(

				'plugin_not_found',

				esc_html(

					sprintf(

						/* translators: placeholder is a plugin slug. */

						__( 'Plugin %s is not installed.', 'jetpack' ),

						$plugin

					)

				),

				array( 'status' => 404 )

			);

		}

		// Is the plugin active already?

		$status = Jetpack_Plugins::get_plugin_status( $plugin );

		$plugin = stripslashes( $request['plugin'] );

		if ( ! in_array( $plugin, array_keys( $plugins ) ) ) {

			return new WP_Error( 'plugin_not_found', esc_html( sprintf( __( 'Plugin %s is not installed.', 'jetpack' ), $plugin ) ), array( 'status' => 404 ) );

		}

		$plugin_data = $plugins[ $plugin ];