public function admin_head() {

		// Enqueue scripts
		wp_enqueue_script( 'bbp-converter' );

		// Localize JS
		wp_localize_script( 'bbp-converter', 'BBP_Converter', array(

			// Nonce
			'ajax_nonce' => wp_create_nonce( 'bbp_converter_process' ),

			// UI State
			'state' => array(
				'delay'         => (int)  get_option( '_bbp_converter_delay_time', 2 ),
				'started'       => (bool) get_option( '_bbp_converter_step',       0 ),
				'running'       => false,
				'status'        => false,
				'step_percent'  => $this->step_percentage,
				'total_percent' => $this->total_percentage
			),

			// Strings
			'strings' => array(

				// Button text
				'button_start'        => esc_html__( 'Start',    'bbpress' ),
				'button_continue'     => esc_html__( 'Continue', 'bbpress' ),

				// Start button clicked
				'start_start'         => esc_html__( 'Starting Import...',   'bbpress' ),
				'start_continue'      => esc_html__( 'Continuing Import...', 'bbpress' ),

				// Import
				'import_complete'     => esc_html__( 'Import Finished.',            'bbpress' ),
				'import_stopped_user' => esc_html__( 'Import Stopped (by User.)',   'bbpress' ),
				'import_error_halt'   => esc_html__( 'Import Halted (Error.)',      'bbpress' ),
				'import_error_db'     => esc_html__( 'Database Connection Failed.', 'bbpress' ),

				// Status
				'status_complete'     => esc_html__( 'Finished',              'bbpress' ),
				'status_stopped'      => esc_html__( 'Stopped',               'bbpress' ),
				'status_starting'     => esc_html__( 'Starting',              'bbpress' ),
				'status_up_next'      => esc_html__( 'Doing step %s...',      'bbpress' ),
				'status_counting'     => esc_html__( 'Next in %s seconds...', 'bbpress' )
			)
		) );
	}