<?php

defined( 'ABSPATH' ) or 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;

	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( '1 new event', '%d new events', $numNewRows, 'simple-history' ), $numNewRows );
			$json_data["strings"] = array(
				"newRowsFound" => $textRowsFound
			);

		}

		wp_send_json_success( $json_data );

	}

} // class