<?php

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Geolocation class
 *
 * Handles geolocation and updating the geolocation database.
 *
 * @version 4.5.0
 */

/**
 * ES_Geolocation Class.
 */
class ES_Geolocation {


	/**
	 * API endpoints for geolocating an IP address
	 *
	 * @var array
	 */
	private static $geoip_apis = array(
		'ipinfo.io'  => 'https://ipinfo.io/%s/json',
		'ip-api.com' => 'http://ip-api.com/json/%s',
	);

	/**
	 * Icegram API endpoints for geolocating an IP address
	 *
	 * @var string
	 *
	 * @since 4.7.3
	 */
	private static $icegram_api_url = 'http://api.icegram.com/geo/';

	/**
	 * Geolocate an IP address.
	 *
	 * @param string $ip_address IP Address.
	 *
	 * @return array
	 */
	public static function geolocate_ip( $ip_address = '' ) {

		/**
		 * Get geolocation filter.
		 *
		 * @param string $ip_address IP Address.
		 *
		 * @since 4.5.0
		 */
		$geolocation = apply_filters(
			'ig_es_get_geolocation',
			array(),
			$ip_address
		);

		if ( ! empty( $geolocation ) ) {
			return $geolocation;
		}

		if ( ! is_array( $geolocation ) ) {
			$geolocation = array();
		}

		$geolocation = self::geolocate_via_api( $ip_address );

		return $geolocation;
	}

	/**
	 * Convert the String TimeZone to seconds
	 *
	 * @param $timezone
	 *
	 * @return string
	 */
	public static function convert_timezone_to_seconds( $timezone ) {
		if ( empty( $timezone ) ) {
			return '+0:00';
		}
		try {
			$current = timezone_open( $timezone );
			$utcTime = new DateTime( 'now', new DateTimeZone( 'UTC' ) );
			$offset_in_secs = $current->getOffset( $utcTime );
			$hours_and_sec  = gmdate( 'H:i', abs( $offset_in_secs ) );

			return stripos( $offset_in_secs, '-' ) === false ? "+{$hours_and_sec}" : "-{$hours_and_sec}";
		} catch ( Exception $exception ) {
			return '+0:00';
		}
	}

	/**
	 * Use APIs to Geolocate the user.
	 *
	 * Geolocation APIs can be added through the use of the ig_es_geolocation_geoip_apis filter.
	 * Provide a name=>value pair for service-slug=>endpoint.
	 *
	 * If APIs are defined, one will be chosen at random to fulfil the request. After completing, the result
	 * will be cached in a transient.
	 *
	 * @param string $ip_address IP address.
	 *
	 * @return array
	 */
	private static function geolocate_via_api( $ip_address ) {
		$geo_ip_data = get_transient( 'ig_es_geoip_' . $ip_address );

		if ( empty( $geo_ip_data ) ) {
			$geo_ip_data    = array();
			$geoip_services = apply_filters( 'ig_es_geolocation_geoip_apis', self::$geoip_apis );

			if ( empty( $geoip_services ) ) {
				return $geo_ip_data;
			}

			$geoip_services_keys = array_keys( $geoip_services );

			shuffle( $geoip_services_keys );

			foreach ( $geoip_services_keys as $service_name ) {
				$service_endpoint = $geoip_services[ $service_name ];
				$response         = wp_safe_remote_get( sprintf( $service_endpoint, $ip_address ), array( 'timeout' => 2 ) );

				if ( ! is_wp_error( $response ) && $response['body'] ) {
					switch ( $service_name ) {
						case 'ipinfo.io':
							$data         = json_decode( $response['body'] );
							$country_code = isset( $data->country ) ? $data->country : '';
							$timezone     = isset( $data->timezone ) ? self::convert_timezone_to_seconds( $data->timezone ) : '+0:00';
							break;
						case 'ip-api.com':
							$data         = json_decode( $response['body'] );
							$country_code = isset( $data->countryCode ) ? $data->countryCode : ''; // @codingStandardsIgnoreLine
							$timezone     = isset( $data->timezone ) ? self::convert_timezone_to_seconds( $data->timezone ) : '+0:00';
							break;
						default:
							$country_code = apply_filters( 'ig_es_geolocation_geoip_response_' . $service_name, '', $response['body'] );
							$timezone     = apply_filters( 'ig_es_geolocation_geoip_timezone_response_' . $service_name, '', $response['body'] );
							break;
					}

					$country_code = sanitize_text_field( strtoupper( $country_code ) );

					if ( $country_code ) {
						$geo_ip_data['country_code'] = $country_code;
						$geo_ip_data['timezone']     = $timezone;
						break;
					}
				}
			}

			// Use Icegram geo location API incase if we still don't have the location data.
			if ( empty( $geo_ip_data ) ) {
				$response = wp_safe_remote_get(
					self::$icegram_api_url . $ip_address,
					array(
						'timeout' => 2,
					)
				);
				if ( ! is_wp_error( $response ) && $response['body'] ) {
					$data         = json_decode( $response['body'] );
					$country_code = isset( $data->country_code ) ? $data->country_code : '';
					$timezone     = isset( $data->timezone ) ? self::convert_timezone_to_seconds( $data->timezone ) : '+0:00';
					if ( $country_code ) {
						$geo_ip_data['country_code'] = $country_code;
						$geo_ip_data['timezone']     = $timezone;
					}
				}
			}

			if ( ! empty( $geo_ip_data ) ) {
				set_transient( 'ig_es_geoip_' . $ip_address, $geo_ip_data, WEEK_IN_SECONDS );
			}
		}

		return $geo_ip_data;
	}

	/**
	 * Method to get country name based on ISO code.
	 *
	 * @since 4.5.0
	 */
	public static function get_country_name_from_country_code( $country_code = '' ) {

		$countries_data = self::get_countries();

		if ( isset( $countries_data[ $country_code ] ) ) {
			return $countries_data[ $country_code ];
		} else {
			return '';
		}
	}

	public static function get_countries() {

		$countries_data = array(
			'AF' => 'Afghanistan',
			'AX' => 'Aland Islands',
			'AL' => 'Albania',
			'DZ' => 'Algeria',
			'AS' => 'American Samoa',
			'AD' => 'Andorra',
			'AO' => 'Angola',
			'AI' => 'Anguilla',
			'AQ' => 'Antarctica',
			'AG' => 'Antigua And Barbuda',
			'AR' => 'Argentina',
			'AM' => 'Armenia',
			'AW' => 'Aruba',
			'AU' => 'Australia',
			'AT' => 'Austria',
			'AZ' => 'Azerbaijan',
			'BS' => 'Bahamas',
			'BH' => 'Bahrain',
			'BD' => 'Bangladesh',
			'BB' => 'Barbados',
			'BY' => 'Belarus',
			'BE' => 'Belgium',
			'BZ' => 'Belize',
			'BJ' => 'Benin',
			'BM' => 'Bermuda',
			'BT' => 'Bhutan',
			'BO' => 'Bolivia',
			'BA' => 'Bosnia And Herzegovina',
			'BW' => 'Botswana',
			'BV' => 'Bouvet Island',
			'BR' => 'Brazil',
			'IO' => 'British Indian Ocean Territory',
			'BN' => 'Brunei Darussalam',
			'BG' => 'Bulgaria',
			'BF' => 'Burkina Faso',
			'BI' => 'Burundi',
			'KH' => 'Cambodia',
			'CM' => 'Cameroon',
			'CA' => 'Canada',
			'CV' => 'Cape Verde',
			'KY' => 'Cayman Islands',
			'CF' => 'Central African Republic',
			'TD' => 'Chad',
			'CL' => 'Chile',
			'CN' => 'China',
			'CX' => 'Christmas Island',
			'CC' => 'Cocos Island',
			'CO' => 'Colombia',
			'KM' => 'Comoros',
			'CG' => 'Congo',
			'CD' => 'Congo, Democratic Republic',
			'CK' => 'Cook Islands',
			'CR' => 'Costa Rica',
			'CI' => 'Cote D\'Ivoire',
			'HR' => 'Croatia',
			'CU' => 'Cuba',
			'CY' => 'Cyprus',
			'CZ' => 'Czech Republic',
			'DK' => 'Denmark',
			'DJ' => 'Djibouti',
			'DM' => 'Dominica',
			'DO' => 'Dominican Republic',
			'EC' => 'Ecuador',
			'EG' => 'Egypt',
			'SV' => 'El Salvador',
			'GQ' => 'Equatorial Guinea',
			'ER' => 'Eritrea',
			'EE' => 'Estonia',
			'ET' => 'Ethiopia',
			'FK' => 'Falkland Islands',
			'FO' => 'Faroe Islands',
			'FJ' => 'Fiji',
			'FI' => 'Finland',
			'FR' => 'France',
			'GF' => 'French Guiana',
			'PF' => 'French Polynesia',
			'TF' => 'French Southern Territories',
			'GA' => 'Gabon',
			'GM' => 'Gambia',
			'GE' => 'Georgia',
			'DE' => 'Germany',
			'GH' => 'Ghana',
			'GI' => 'Gibraltar',
			'GR' => 'Greece',
			'GL' => 'Greenland',
			'GD' => 'Grenada',
			'GP' => 'Guadeloupe',
			'GU' => 'Guam',
			'GT' => 'Guatemala',
			'GG' => 'Guernsey',
			'GN' => 'Guinea',
			'GW' => 'Guinea-Bissau',
			'GY' => 'Guyana',
			'HT' => 'Haiti',
			'HM' => 'Heard Island & Mcdonald Islands',
			'VA' => 'Holy See (Vatican City State)',
			'HN' => 'Honduras',
			'HK' => 'Hong Kong',
			'HU' => 'Hungary',
			'IS' => 'Iceland',
			'IN' => 'India',
			'ID' => 'Indonesia',
			'IR' => 'Iran, Islamic Republic Of',
			'IQ' => 'Iraq',
			'IE' => 'Ireland',
			'IM' => 'Isle Of Man',
			'IL' => 'Israel',
			'IT' => 'Italy',
			'JM' => 'Jamaica',
			'JP' => 'Japan',
			'JE' => 'Jersey',
			'JO' => 'Jordan',
			'KZ' => 'Kazakhstan',
			'KE' => 'Kenya',
			'KI' => 'Kiribati',
			'KR' => 'Korea',
			'KW' => 'Kuwait',
			'KG' => 'Kyrgyzstan',
			'LA' => 'Lao People\'s Democratic Republic',
			'LV' => 'Latvia',
			'LB' => 'Lebanon',
			'LS' => 'Lesotho',
			'LR' => 'Liberia',
			'LY' => 'Libyan Arab Jamahiriya',
			'LI' => 'Liechtenstein',
			'LT' => 'Lithuania',
			'LU' => 'Luxembourg',
			'MO' => 'Macao',
			'MK' => 'Macedonia',
			'MG' => 'Madagascar',
			'MW' => 'Malawi',
			'MY' => 'Malaysia',
			'MV' => 'Maldives',
			'ML' => 'Mali',
			'MT' => 'Malta',
			'MH' => 'Marshall Islands',
			'MQ' => 'Martinique',
			'MR' => 'Mauritania',
			'MU' => 'Mauritius',
			'YT' => 'Mayotte',
			'MX' => 'Mexico',
			'FM' => 'Micronesia',
			'MD' => 'Moldova',
			'MC' => 'Monaco',
			'MN' => 'Mongolia',
			'ME' => 'Montenegro',
			'MS' => 'Montserrat',
			'MA' => 'Morocco',
			'MZ' => 'Mozambique',
			'MM' => 'Myanmar',
			'NA' => 'Namibia',
			'NR' => 'Nauru',
			'NP' => 'Nepal',
			'NL' => 'Netherlands',
			'AN' => 'Netherlands',
			'NC' => 'New Caledonia',
			'NZ' => 'New Zealand',
			'NI' => 'Nicaragua',
			'NE' => 'Niger',
			'NG' => 'Nigeria',
			'NU' => 'Niue',
			'NF' => 'Norfolk Island',
			'MP' => 'Northern Mariana Islands',
			'NO' => 'Norway',
			'OM' => 'Oman',
			'PK' => 'Pakistan',
			'PW' => 'Palau',
			'PS' => 'Palestine',
			'PA' => 'Panama',
			'PG' => 'Papua New Guinea',
			'PY' => 'Paraguay',
			'PE' => 'Peru',
			'PH' => 'Philippines',
			'PN' => 'Pitcairn',
			'PL' => 'Poland',
			'PT' => 'Portugal',
			'PR' => 'Puerto Rico',
			'QA' => 'Qatar',
			'RE' => 'Reunion',
			'RO' => 'Romania',
			'RU' => 'Russia',
			'RW' => 'Rwanda',
			'BL' => 'Saint Barthelemy',
			'SH' => 'Saint Helena',
			'KN' => 'Saint Kitts And Nevis',
			'LC' => 'Saint Lucia',
			'MF' => 'Saint Martin',
			'PM' => 'Saint Pierre And Miquelon',
			'VC' => 'Saint Vincent And Grenadines',
			'WS' => 'Samoa',
			'SM' => 'San Marino',
			'ST' => 'Sao Tome And Principe',
			'SA' => 'Saudi Arabia',
			'SN' => 'Senegal',
			'RS' => 'Serbia',
			'SC' => 'Seychelles',
			'SL' => 'Sierra Leone',
			'SG' => 'Singapore',
			'SK' => 'Slovakia',
			'SI' => 'Slovenia',
			'SB' => 'Solomon Islands',
			'SO' => 'Somalia',
			'ZA' => 'South Africa',
			'GS' => 'South Georgia And Sandwich Isl.',
			'ES' => 'Spain',
			'LK' => 'Sri Lanka',
			'SD' => 'Sudan',
			'SR' => 'Suriname',
			'SJ' => 'Svalbard And Jan Mayen',
			'SZ' => 'Swaziland',
			'SE' => 'Sweden',
			'CH' => 'Switzerland',
			'SY' => 'Syrian Arab Republic',
			'TW' => 'Taiwan',
			'TJ' => 'Tajikistan',
			'TZ' => 'Tanzania',
			'TH' => 'Thailand',
			'TL' => 'Timor-Leste',
			'TG' => 'Togo',
			'TK' => 'Tokelau',
			'TO' => 'Tonga',
			'TT' => 'Trinidad And Tobago',
			'TN' => 'Tunisia',
			'TR' => 'Turkey',
			'TM' => 'Turkmenistan',
			'TC' => 'Turks And Caicos Islands',
			'TV' => 'Tuvalu',
			'UG' => 'Uganda',
			'UA' => 'Ukraine',
			'AE' => 'United Arab Emirates',
			'GB' => 'United Kingdom',
			'US' => 'United States',
			'UM' => 'United States Outlying Islands',
			'UY' => 'Uruguay',
			'UZ' => 'Uzbekistan',
			'VU' => 'Vanuatu',
			'VE' => 'Venezuela',
			'VN' => 'Viet Nam',
			'VG' => 'Virgin Islands, British',
			'VI' => 'Virgin Islands, U.S.',
			'WF' => 'Wallis And Futuna',
			'EH' => 'Western Sahara',
			'YE' => 'Yemen',
			'ZM' => 'Zambia',
			'ZW' => 'Zimbabwe',
		);

		return $countries_data;
	}
}