<?php

defined( 'ABSPATH' ) || die();

/**
 * Dropin Name: New Items Notifier
 * Dropin Description: Checks for new rows and displays a info bar when new items are available
 * Dropin URI: http://simple-history.com/
 * Author: Pär Thernström
 */

class SimpleHistoryNewRowsNotifier {


	// Simple History instance
	private $sh;

	// How often we should check for new rows, in ms
	private $interval = 10000;

	public function __construct( $sh ) {

		$this->sh = $sh;

		// How often the script checks for new rows
		$this->interval = (int) apply_filters( 'SimpleHistoryNewRowsNotifier/interval', $this->interval );

		add_action( 'wp_ajax_SimpleHistoryNewRowsNotifier', array( $this, 'ajax' ) );
		add_action( 'simple_history/enqueue_admin_scripts', array( $this, 'enqueue_admin_scripts' ) );
	}

	public function enqueue_admin_scripts() {

		$file_url = plugin_dir_url( __FILE__ );

		wp_enqueue_script( 'simple_history_NewRowsNotifierDropin', $file_url . 'SimpleHistoryNewRowsNotifierDropin.js', array( 'jquery' ), SIMPLE_HISTORY_VERSION, true );

		$arr_localize_data = array(
			'interval' => $this->interval,
			'errorCheck' => _x( 'An error occured while checking for new events', 'New rows notifier: error while checking for new rows', 'simple-history' ),
		);

		wp_localize_script( 'simple_history_NewRowsNotifierDropin', 'simple_history_NewRowsNotifierDropin', $arr_localize_data );

		wp_enqueue_style( 'simple_history_NewRowsNotifierDropin', $file_url . 'SimpleHistoryNewRowsNotifierDropin.css', null, SIMPLE_HISTORY_VERSION );
	}

	public function ajax() {

		$apiArgs = isset( $_GET['apiArgs'] ) ? $_GET['apiArgs'] : array();

		if ( ! $apiArgs ) {
			wp_send_json_error(
				array(
					'error' => 'MISSING_APIARGS',
				)
			);
		}

		if ( empty( $apiArgs['since_id'] ) || ! is_numeric( $apiArgs['since_id'] ) ) {
			wp_send_json_error(
				array(
					'error' => 'MISSING_SINCE_ID',
				)
			);
		}

		// User must have capability to view the history page
		if ( ! current_user_can( $this->sh->get_view_history_capability() ) ) {
			wp_send_json_error(
				array(
					'error' => 'CAPABILITY_ERROR',
				)
			);
		}

		// $since_id = isset( $_GET["since_id"] ) ? absint($_GET["since_id"]) : null;
		$logQueryArgs = $apiArgs;

		$logQuery = new SimpleHistoryLogQuery();
		$answer = $logQuery->query( $logQueryArgs );

		// Use our own response array instead of $answer to keep size down
		$json_data = array();

		$numNewRows = isset( $answer['total_row_count'] ) ? $answer['total_row_count'] : 0;
		$json_data['num_new_rows'] = $numNewRows;
		$json_data['num_mysql_queries'] = get_num_queries();

		if ( $numNewRows ) {
			// We have new rows
			// Append strings
			$textRowsFound = sprintf( _n( '%s new event', '%s new events', $numNewRows, 'simple-history' ), $numNewRows );
			$json_data['strings'] = array(
				'newRowsFound' => $textRowsFound,
			);
		}

		wp_send_json_success( $json_data );
	}
}
