<?php

function awpcp_esc_attr($text) {
	// WP adds slashes to all request variables
	$text = stripslashes($text);
	// AWPCP adds more slashes
	$text = stripslashes($text);
	$text = esc_attr($text);
	return $text;
}

function awpcp_esc_textarea($text) {
	$text = stripslashes($text);
	$text = stripslashes($text);
	$text = esc_textarea($text);
	return $text;
}

/**
 * @since 3.3
 */
function awpcp_apply_function_deep( $function, $value ) {
    if ( is_array( $value ) ) {
        foreach ( $value as $key => $data ) {
            $value[ $key ] = awpcp_apply_function_deep( $function, $data );
        }
    } elseif ( is_object( $value ) ) {
        $vars = get_object_vars( $value );
        foreach ( $vars as $key => $data ) {
            $value->{$key} = awpcp_apply_function_deep( $function, $data );
        }
    } elseif ( is_string( $value ) ) {
        $value = call_user_func( $function, $value );
    }

    return $value;
}

/**
 * @since 3.3
 */
function awpcp_strip_all_tags_deep( $string ) {
    return awpcp_apply_function_deep( 'wp_strip_all_tags', $string );
}

/**
 * @since 3.0.2
 */
function awpcp_strptime( $date, $format ) {
	if ( function_exists( 'strptime' ) ) {
		return strptime( $date, $format );
	} else {
		return awpcp_strptime_replacement( $date, $format );
	}
}

/**
 * @since 3.0.2
 */
function awpcp_strptime_replacement( $date, $format ) {
    $masks = array(
        '%d' => '(?P<d>[0-9]{2})',
        '%m' => '(?P<m>[0-9]{2})',
        '%y' => '(?P<y>[0-9]{2})',
        '%Y' => '(?P<Y>[0-9]{4})',
        '%H' => '(?P<H>[0-9]{2})',
        '%M' => '(?P<M>[0-9]{2})',
        '%S' => '(?P<S>[0-9]{2})',
        // usw..
    );

    $regexp = "#" . strtr( preg_quote( $format ), $masks ) . "#";
    if ( ! preg_match( $regexp, $date, $out ) ) {
        return false;
    }

    $unparsed = preg_replace( $regexp, '', $date );

    if ( isset( $out['y'] ) && strlen( $out['y'] ) ) {
    	$out['Y'] = ( $out['y'] > 69 ? 1900 : 2000 ) + $out['y'];
    }

    $ret = array(
        'tm_sec' => (int) awpcp_array_data( 'S', 0, $out),
        'tm_min' => (int) awpcp_array_data( 'M', 0, $out),
        'tm_hour' => (int) awpcp_array_data( 'H', 0, $out),
        'tm_mday' => (int) awpcp_array_data( 'd', 0, $out),
        'tm_mon' => awpcp_array_data( 'm', 0, $out) ? awpcp_array_data( 'm', 0, $out) - 1 : 0,
        'tm_year' => awpcp_array_data( 'Y', 0, $out) > 1900 ? awpcp_array_data( 'Y', 0, $out) - 1900 : 0,
        'unparsed' => $unparsed,
    );

    return $ret;
}

/**
 * @since	3.0
 */
function awpcp_date_formats() {
	static $translations;

	if ( ! is_array( $translations ) ) {
		$translations = array(
			'd' => 'dd',
			'j' => 'd',
			's' => null,
			'l' => 'DD',
			'D' => 'D',
			'm' => 'mm',
			'n' => 'm',
			'F' => 'MM',
			'M' => 'M',
			'Y' => 'yy',
			'y' => 'y',
			'c' => 'ISO_8601',
			'r' => 'RFC_822',
		);
	}

	return $translations;
}


/**
 * @since	3.0
 */
function awpcp_time_formats() {
	static $translations;

	if ( ! is_array( $translations ) ) {
		$translations = array(
			'a' => 'p',
			'A' => 'P',
			'g' => 'h',
			'h' => 'hh',
			'G' => 'H',
			'H' => 'HH',
			'i' => 'mm',
			's' => 'ss',
			'T' => null,
			'c' => null,
			'r' => null
		);
	}

	return $translations;
}


/**
 * Translates PHP date format strings to jQuery Datepicker format.
 * @since  	3.0
 */
function awpcp_datepicker_format($format) {
	return _awpcp_replace_format($format, awpcp_date_formats());
}

/**
 * Translates PHP time format strings to jQuery TimePicker format.
 * @since	3.0
 */
function awpcp_timepicker_format($format) {
	return _awpcp_replace_format($format, awpcp_time_formats());
}


/**
 * @since	3.0
 */
function _awpcp_replace_format($format, $translations) {
	$pattern = join( '|', array_map( 'preg_quote', array_keys( $translations ) ) );

	preg_match_all( "/$pattern/s", $format, $matches );

	$processed = array();
	foreach ( $matches[0] as $match ) {
		if ( ! isset( $processed[ $match ] ) ) {
			$format = str_replace( $match, $translations[ $match ], $format );
			$processed[ $match ] = true;
		}
	}

	return $format;
}


/**
 * @since	3.0
 */
function awpcp_get_date_format() {
	return get_awpcp_option('date-format');
}


/**
 * @since	3.0
 */
function awpcp_get_time_format() {
	return get_awpcp_option('time-format');
}


/**
 * @since	3.0
 */
function awpcp_get_datetime_format() {
	$format = get_awpcp_option('date-time-format');
	$format = str_replace('<date>', '******', $format);
	$format = str_replace('<time>', '*^*^*^', $format);
	$format = preg_replace('/(\w)/', '\\\\$1', $format);
	$format = str_replace('******', awpcp_get_date_format(), $format);
	$format = str_replace('*^*^*^', awpcp_get_time_format(), $format);
	return $format;
}

/**
 * Returns the given date as MySQL date string, Unix timestamp or
 * using a custom format.
 *
 * If $date is null or an empty string, then the function uses the timestamp
 * of current time in the blog's configured timezone as the timestamp to
 * generate formated dates.
 *
 * @since 3.0.2
 * @param $format 	'mysql', 'timestamp', 'awpcp', 'awpcp-date', 'awpcp-time'
 *					  or first arguemnt for date() function.
 */
function awpcp_datetime( $format='mysql', $date=null ) {
	if ( is_null( $date ) || strlen( $date ) === 0 ) {
		$timestamp = current_time( 'timestamp' );
	} else if ( is_string( $date ) ) {
		$timestamp = strtotime( $date );
	} else {
        $timestamp = $date;
    }

	switch ( $format ) {
		case 'mysql':
			return date( 'Y-m-d H:i:s', $timestamp );
		case 'timestamp':
			return $timestamp;
		case 'time-elapsed':
			return sprintf( __( '%s ago' ), human_time_diff( strtotime( $date ) ) );
		case 'awpcp':
			return date_i18n( awpcp_get_datetime_format(), $timestamp ) ;
		case 'awpcp-date':
			return date_i18n( awpcp_get_date_format(), $timestamp );
		case 'awpcp-time':
			return date_i18n( awpcp_get_time_format(), $timestamp );
		default:
			return date_i18n( $format, $timestamp );
	}
}

function awpcp_set_datetime_date( $datetime, $date ) {
    $base_timestamp = strtotime( $datetime );
    $base_year_month_day_timestamp = strtotime( date( 'Y-m-d', strtotime( $datetime ) ) );
    $time_of_the_day_in_seconds = $base_timestamp - $base_year_month_day_timestamp;

    $target_year_month_day_timestamp = strtotime( date( 'Y-m-d', strtotime( $date ) ) );

    $new_datetime_timestamp = $target_year_month_day_timestamp + $time_of_the_day_in_seconds;

    return awpcp_datetime( 'mysql', $new_datetime_timestamp );
}

function awpcp_extend_date_to_end_of_the_day( $datetime ) {
    $next_day = strtotime( '+ 1 days', $datetime );
    $zero_hours_next_day = strtotime( date( 'Y-m-d', $next_day ) );
    $end_of_the_day = $zero_hours_next_day - 1;

    return $end_of_the_day;
}

function awpcp_is_mysql_date( $date ) {
	$regexp = '/^\d{4}-\d{1,2}-\d{1,2}(\s\d{1,2}:\d{1,2}(:\d{1,2})?)?$/';
	return preg_match( $regexp, $date ) === 1;
}


/**
 * Returns a WP capability required to be considered an AWPCP admin.
 *
 * http://codex.wordpress.org/Roles_and_Capabilities#Capability_vs._Role_Table
 *
 * @since 2.0.7
 */
function awpcp_admin_capability() {
    return 'manage_classifieds';
}

/**
 * @since 3.3.2
 */
function awpcp_admin_roles_names() {
    return awpcp_roles_and_capabilities()->get_administrator_roles_names();
}

/**
 * Check if current user is an Administrator according to
 * AWPCP settings.
 */
function awpcp_current_user_is_admin() {
    return awpcp_roles_and_capabilities()->current_user_is_administrator();
}

/**
 * @since 3.4
 */
function awpcp_current_user_is_moderator() {
    return awpcp_roles_and_capabilities()->current_user_is_moderator();
}


function awpcp_user_is_admin($id) {
    return awpcp_roles_and_capabilities()->user_is_administrator( $id );
}


function awpcp_get_grid_item_css_class($classes, $pos, $columns, $rows) {
	if ($pos < $columns)
		$classes[] = 'first-row';
	if ($pos >= (($rows - 1) * $columns))
		$classes[] = 'last-row';
	if ($pos == 0 || $pos % $columns == 0)
		$classes[] = 'first-column';
	if (($pos + 1) % $columns == 0)
		$classes[] = 'last-column';
	return $classes;
}

/**
 * @since 	3.0
 * @param  	array 	$params
 * @param  	string 	$url
 * @return 	String	HTML
 */
function awpcp_pagination($config, $url) {

    $blacklist = array(
        'offset',
					   'results',
					   'PHPSESSID',
					   'aeaction',
					   'cat_ID',
					   'action',
					   'aeaction',
					   'category_name',
					   'category_parent_id',
					   'createeditadcategory',
					   'deletemultiplecategories',
					   'movedeleteads',
					   'moveadstocategory',
					   'category_to_delete',
					   'tpname',
					   'category_icon',
					   'sortby',
					   'adid',
					   'picid',
					   'adkey',
					   'editemail',
					   'awpcp_ads_to_action',
					   'post_type');

	$params = array_merge($_GET, $_POST);
	foreach ($blacklist as $param) {
		unset($params[$param]);
	}

	extract(shortcode_atts(array('offset' => 0, 'results' => 10, 'total' => 10), $config));

    $items = array();
    $radius = 5;

    if ( $results > 0 ) {
        $pages = ceil($total / $results);
        $page = floor($offset / $results) + 1;
    } else {
        $pages = 1;
        $page = 1;
    }

    if ( ( $page - $radius ) > 2 ) {
        $items[] = awpcp_render_pagination_item( '&laquo;&laquo;', 1, $results, $params, $url );
    }

    if ( $page > 1 ) {
        $items[] = awpcp_render_pagination_item( '&laquo;', $page - 1, $results, $params, $url );
    }

	for ($i=1; $i <= $pages; $i++) {
        if ( $page == $i ) {
            $items[] = sprintf('%d', $i);
        } else if ( $i < ( $page - $radius ) ) {
            // pass
        } else if ( $i > ( $page + $radius ) ) {
            // pass
        } else {
            $items[] = awpcp_render_pagination_item( $i, $i, $results, $params, $url );
        }
	}

    if ( $page < ( $pages - 1 ) ) {
        $items[] = awpcp_render_pagination_item( '&raquo;', $page + 1, $results, $params, $url );
    }

    if ( ( $page + $radius ) < ( $pages - 1 ) ) {
        $items[] = awpcp_render_pagination_item( '&raquo;&raquo;', $pages, $results, $params, $url );
    }

	$pagination = implode( '', $items );
	$options = awpcp_pagination_options( $results );

	ob_start();
		include(AWPCP_DIR . '/frontend/templates/listings-pagination.tpl.php');
		$html = ob_get_contents();
	ob_end_clean();

	return $html;
}

function awpcp_render_pagination_item( $label, $page, $results_per_page, $params, $url ) {
    $params = array_merge(
        $params,
        array(
            'offset' => ( $page - 1 ) * $results_per_page,
            'results' => $results_per_page,
        )
    );

    $url = add_query_arg( urlencode_deep( $params ), $url );

    return sprintf( '<a href="%s">%s</a>', esc_url( $url ), $label );
}

/**
 * @since 3.2.1
 */
function awpcp_pagination_options( $selected=10 ) {
    $options = get_awpcp_option( 'pagination-options' );
    return awpcp_build_pagination_options( $options, $selected );
}

/**
 * @since 3.3.2
 */
function awpcp_build_pagination_options( $options, $selected ) {
    array_unshift( $options, 0 );

    for ( $i = count( $options ) - 1; $i >= 0; $i-- ) {
        if ( $options[ $i ] < $selected ) {
            array_splice( $options, $i + 1, 0, $selected );
            break;
        }
    }

    $options_without_zero = array_filter( $options, 'intval' );

    return array_combine( $options_without_zero , $options_without_zero );
}

/**
 * @since 3.3.2
 */
function awpcp_default_pagination_options( $selected = 10 ) {
    $default_options = awpcp()->settings->get_option_default_value( 'pagination-options' );
    return awpcp_build_pagination_options( $default_options, $selected );
}

function awpcp_get_categories() {
	global $wpdb;

	$sql = 'SELECT * FROM ' . AWPCP_TABLE_CATEGORIES;
	$results = $wpdb->get_results($sql);

	return $results;
}

function awpcp_get_categories_ids() {
	static $categories;

	if (!is_array($categories)) {
		$categories = awpcp_get_properties( awpcp_get_categories(), 'category_id' );
	}

	return $categories;
}

/**
 * @since 3.0
 */
function awpcp_get_comma_separated_categories_list($categories=array(), $threshold=5) {
	$names = awpcp_get_properties( $categories, 'name' );
	return awpcp_get_comma_separated_list( $names, $threshold, __( 'None', 'another-wordpress-classifieds-plugin' ) );
}

/**
 * @since 3.0
 */
function awpcp_get_comma_separated_list($items=array(), $threshold=5, $none='') {
	$items = array_filter( $items, 'strlen' );
	$count = count( $items );

	if ( $count > $threshold ) {
		$message = _x( '%s and %d more.', 'comma separated list of things', 'another-wordpress-classifieds-plugin' );
		$items = array_splice( $items, 0, $threshold - 1 );
		return sprintf( $message, join( ', ', $items ), $count - $threshold + 1 );
	} else if ( $count > 0 ) {
		return sprintf( '%s.', join( ', ', $items ) );
	} else {
		return $none;
	}
}

/**
 * Returns an array of Region fields. Only those enabled
 * in the settings will be returned.
 *
 * @param $translations array 	Allow developers to change the name
 * 								attribute of the form field associated
 *								to this Region Field.
 * @since 3.0.2
 */
function awpcp_region_fields( $context='details', $enabled_fields = null ) {
    $enabled_fields = is_null( $enabled_fields ) ? awpcp_get_enabled_region_fields() : $enabled_fields;

    $fields = apply_filters( 'awpcp-region-fields', false, $context, $enabled_fields );

    if ( false === $fields ) {
    	$fields = awpcp_default_region_fields( $context, $enabled_fields );
    }

    return $fields;
}

/**
 * @since 3.3.1
 */
function awpcp_get_enabled_region_fields() {
    return array(
        'country' => get_awpcp_option( 'displaycountryfield' ),
        'state' => get_awpcp_option( 'displaystatefield' ),
        'city' => get_awpcp_option( 'displaycityfield' ),
        'county' => get_awpcp_option( 'displaycountyvillagefield' ),
    );
}

/**
 * @since 3.0.2
 */
function awpcp_default_region_fields( $context='details', $enabled_fields = null ) {
    $enabled_fields = is_null( $enabled_fields ) ? awpcp_get_enabled_region_fields() : $enabled_fields;
    $show_city_field_before_county_field = get_awpcp_option( 'show-city-field-before-county-field' );

    $always_shown = in_array( $context, array( 'details', 'search', 'user-profile' ) );
    $can_be_required = $context !== 'search';
    $_fields = array();

    if ( $enabled_fields['country'] ) {
    	$required = $can_be_required && ( (bool) get_awpcp_option( 'displaycountryfieldreqop' ) );
        $_fields['country'] = array(
            'type' => 'country',
            'label' => __('Country', 'another-wordpress-classifieds-plugin') . ( $required ? '*' : '' ),
            'help' => __('separate countries by commas', 'another-wordpress-classifieds-plugin'),
            'required' => $required,
            'alwaysShown' => $always_shown,
        );
    }
    if ( $enabled_fields['state'] ) {
    	$required = $can_be_required && ( (bool) get_awpcp_option( 'displaystatefieldreqop' ) );
        $_fields['state'] = array(
            'type' => 'state',
            'label' => __('State/Province', 'another-wordpress-classifieds-plugin') . ( $required ? '*' : '' ),
            'help' => __('separate states by commas', 'another-wordpress-classifieds-plugin'),
            'required' => $required,
            'alwaysShown' => $always_shown,
        );
    }
    if ( $enabled_fields['city'] ) {
    	$required = $can_be_required && ( (bool) get_awpcp_option( 'displaycityfieldreqop' ) );
        $_fields['city'] = array(
            'type' => 'city',
            'label' => __('City', 'another-wordpress-classifieds-plugin') . ( $required ? '*' : '' ),
            'help' => __('separate cities by commas', 'another-wordpress-classifieds-plugin'),
            'required' => $required,
            'alwaysShown' => $always_shown,
        );
    }
    if ( $enabled_fields['county'] ) {
    	$required = $can_be_required && ( (bool) get_awpcp_option( 'displaycountyvillagefieldreqop' ) );
        $_fields['county'] = array(
            'type' => 'county',
            'label' => __('County/Village/Other', 'another-wordpress-classifieds-plugin') . ( $required ? '*' : '' ),
            'help' => __('separate counties by commas', 'another-wordpress-classifieds-plugin'),
            'required' => $required,
            'alwaysShown' => $always_shown,
        );
    }

    if ( ! $show_city_field_before_county_field ) {
        $fields = array();
        foreach( array( 'country', 'state', 'county', 'city' ) as $field ) {
            if ( isset( $_fields[ $field ] ) ) {
                $fields[ $field ] = $_fields[ $field ];
            }
        }
    } else {
        $fields = $_fields;
    }

    return $fields;
}

function awpcp_country_list_options($value=false, $use_names=true) {
	$countries = array(
	    'US' => 'United States',
	    'AL' => 'Albania',
	    'DZ' => 'Algeria',
	    'AD' => 'Andorra',
	    'AO' => 'Angola',
	    'AI' => 'Anguilla',
	    'AG' => 'Antigua and Barbuda',
	    'AR' => 'Argentina',
	    'AM' => 'Armenia',
	    'AW' => 'Aruba',
	    'AU' => 'Australia',
	    'AT' => 'Austria',
	    'AZ' => 'Azerbaijan Republic',
	    'BS' => 'Bahamas',
	    'BH' => 'Bahrain',
	    'BB' => 'Barbados',
	    'BE' => 'Belgium',
	    'BZ' => 'Belize',
	    'BJ' => 'Benin',
	    'BM' => 'Bermuda',
	    'BT' => 'Bhutan',
	    'BO' => 'Bolivia',
	    'BA' => 'Bosnia and Herzegovina',
	    'BW' => 'Botswana',
	    'BR' => 'Brazil',
	    'BN' => 'Brunei',
	    'BG' => 'Bulgaria',
	    'BF' => 'Burkina Faso',
	    'BI' => 'Burundi',
	    'KH' => 'Cambodia',
	    'CA' => 'Canada',
	    'CV' => 'Cape Verde',
	    'KY' => 'Cayman Islands',
	    'TD' => 'Chad',
	    'CL' => 'Chile',
	    'C2' => 'China',
	    'CO' => 'Colombia',
	    'KM' => 'Comoros',
	    'CK' => 'Cook Islands',
	    'CR' => 'Costa Rica',
	    'HR' => 'Croatia',
	    'CY' => 'Cyprus',
	    'CZ' => 'Czech Republic',
	    'CD' => 'Democratic Republic of the Congo',
	    'DK' => 'Denmark',
	    'DJ' => 'Djibouti',
	    'DM' => 'Dominica',
	    'DO' => 'Dominican Republic',
	    'EC' => 'Ecuador',
	    'SV' => 'El Salvador',
	    'ER' => 'Eritrea',
	    'EE' => 'Estonia',
	    'ET' => 'Ethiopia',
	    'FK' => 'Falkland Islands',
	    'FO' => 'Faroe Islands',
	    'FJ' => 'Fiji',
	    'FI' => 'Finland',
	    'FR' => 'France',
	    'GF' => 'French Guiana',
	    'PF' => 'French Polynesia',
	    'GA' => 'Gabon Republic',
	    'GM' => 'Gambia',
	    'DE' => 'Germany',
	    'GI' => 'Gibraltar',
	    'GR' => 'Greece',
	    'GL' => 'Greenland',
	    'GD' => 'Grenada',
	    'GP' => 'Guadeloupe',
	    'GT' => 'Guatemala',
	    'GN' => 'Guinea',
	    'GW' => 'Guinea Bissau',
	    'GY' => 'Guyana',
	    'HN' => 'Honduras',
	    'HK' => 'Hong Kong',
	    'HU' => 'Hungary',
	    'IS' => 'Iceland',
	    'IN' => 'India',
	    'ID' => 'Indonesia',
	    'IE' => 'Ireland',
	    'IL' => 'Israel',
	    'IT' => 'Italy',
	    'JM' => 'Jamaica',
	    'JP' => 'Japan',
	    'JO' => 'Jordan',
	    'KZ' => 'Kazakhstan',
	    'KE' => 'Kenya',
	    'KI' => 'Kiribati',
	    'KW' => 'Kuwait',
	    'KG' => 'Kyrgyzstan',
	    'LA' => 'Laos',
	    'LV' => 'Latvia',
	    'LS' => 'Lesotho',
	    'LI' => 'Liechtenstein',
	    'LT' => 'Lithuania',
	    'LU' => 'Luxembourg',
	    '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',
	    'MN' => 'Mongolia',
	    'MS' => 'Montserrat',
	    'MA' => 'Morocco',
	    'MZ' => 'Mozambique',
	    'NA' => 'Namibia',
	    'NR' => 'Nauru',
	    'NP' => 'Nepal',
	    'NL' => 'Netherlands',
	    'AN' => 'Netherlands Antilles',
	    'NC' => 'New Caledonia',
	    'NZ' => 'New Zealand',
	    'NI' => 'Nicaragua',
	    'NE' => 'Niger',
	    'NU' => 'Niue',
	    'NF' => 'Norfolk Island',
	    'NO' => 'Norway',
	    'OM' => 'Oman',
	    'PW' => 'Palau',
	    'PA' => 'Panama',
	    'PG' => 'Papua New Guinea',
	    'PE' => 'Peru',
	    'PH' => 'Philippines',
	    'PN' => 'Pitcairn Islands',
	    'PL' => 'Poland',
	    'PT' => 'Portugal',
	    'QA' => 'Qatar',
	    'CG' => 'Republic of the Congo',
	    'RE' => 'Reunion',
	    'RO' => 'Romania',
	    'RU' => 'Russia',
	    'RW' => 'Rwanda',
	    'KN' => 'Saint Kitts and Nevis Anguilla',
	    'PM' => 'Saint Pierre and Miquelon',
	    'VC' => 'Saint Vincent and Grenadines',
	    'WS' => 'Samoa',
	    'SM' => 'San Marino',
	    'ST' => 'São Tomé and Príncipe',
	    'SA' => 'Saudi Arabia',
	    'SN' => 'Senegal',
	    'SC' => 'Seychelles',
	    'SL' => 'Sierra Leone',
	    'SG' => 'Singapore',
	    'SK' => 'Slovakia',
	    'SI' => 'Slovenia',
	    'SB' => 'Solomon Islands',
	    'SO' => 'Somalia',
	    'ZA' => 'South Africa',
	    'KR' => 'South Korea',
	    'ES' => 'Spain',
	    'LK' => 'Sri Lanka',
	    'SH' => 'St. Helena',
	    'LC' => 'St. Lucia',
	    'SR' => 'Suriname',
	    'SJ' => 'Svalbard and Jan Mayen Islands',
	    'SZ' => 'Swaziland',
	    'SE' => 'Sweden',
	    'CH' => 'Switzerland',
	    'TW' => 'Taiwan',
	    'TJ' => 'Tajikistan',
	    'TZ' => 'Tanzania',
	    'TH' => 'Thailand',
	    'TG' => 'Togo',
	    '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',
	    'UY' => 'Uruguay',
	    'VU' => 'Vanuatu',
	    'VA' => 'Vatican City State',
	    'VE' => 'Venezuela',
	    'VN' => 'Vietnam',
	    'VG' => 'Virgin Islands (British)',
	    'WF' => 'Wallis and Futuna Islands',
	    'YE' => 'Yemen',
	    'ZM' => 'Zambia',
	);

	$options[] ='<option value="">' . __('-- Choose a Country --', 'another-wordpress-classifieds-plugin') . '</option>';

	foreach ($countries as $code => $name) {
		if ($use_names) {
			$selected = $value == $name ? ' selected="selected"' : '';
			$options[] = sprintf('<option value="%s"%s>%s</option>', $name, $selected, $name);
		} else {
			$selected = $value == $code ? ' selected="selected"' : '';
			$options[] = sprintf('<option value="%s"%s>%s</option>', $code, $selected, $name);
		}
	}

	return join('', $options);
}


/**
 * AWPCP misc functions
 *
 * TODO: merge content from functions_awpcp.php,
 * fileop.class.php, dcfunctions.php, upload_awpcp.php
 * as needed.
 */

/**
 * @deprecated 3.0.2 use $media->get_url()
 */
function awpcp_get_image_url($image, $suffix='') {
	_deprecated_function( __FUNCTION__, '3.0.2', 'AWPCP_Media::get_url()' );

	static $uploads = array();

	if ( empty( $uploads ) ) {
		$uploads = awpcp_setup_uploads_dir();
		$uploads = array_shift( $uploads );
	}

	$images = trailingslashit(AWPCPUPLOADURL);
	$thumbnails = trailingslashit(AWPCPTHUMBSUPLOADURL);

	if (is_object($image))
		$basename = $image->image_name;
	if (is_string($image))
		$basename = $image;

	$original = $images . $basename;
	$thumbnail = $thumbnails . $basename;
	$part = empty($suffix) ? '.' : "-$suffix.";

	$info = awpcp_utf8_pathinfo($original);

	if ($suffix == 'original') {
		$alternatives = array($original);
	} else if ($suffix == 'large') {
		$alternatives = array(
			str_replace(".{$info['extension']}", "$part{$info['extension']}", $original),
			$original
		);
	} else {
		$alternatives = array(
			str_replace(".{$info['extension']}", "$part{$info['extension']}", $thumbnail),
			$thumbnail,
			$original
		);
	}

	foreach ($alternatives as $imagepath) {
		if (file_exists(str_replace(AWPCPUPLOADURL, $uploads, $imagepath))) {
			return $imagepath;
		}
	}

	return false;
}

/**
 * Get the primary image of the given Ad.
 *
 * @param  int	$ad_id	Ad's ID
 * @return object	an StdClass object representing an image
 * @deprecated use awpcp_media_api()->get_ad_primary_image()
 */
function awpcp_get_ad_primary_image($ad_id) {
	global $wpdb;

	$query = 'SELECT * FROM ' . AWPCP_TABLE_ADPHOTOS . ' ';
	$query.= 'WHERE ad_id = %d AND is_primary = 1 AND disabled = 0';

	$results = $wpdb->get_results($wpdb->prepare($query, $ad_id));

	if (!empty($results)) return $results[0];

	$query = 'SELECT * FROM ' . AWPCP_TABLE_ADPHOTOS . ' ';
	$query.= 'WHERE ad_id = %d AND disabled = 0 ORDER BY key_id LIMIT 0,1';

	$results = $wpdb->get_results($wpdb->prepare($query, $ad_id));

	return empty($results) ? null : $results[0];
}


function awpcp_array_insert($array, $index, $key, $item, $where='before') {
	$all = array_merge($array, array($key => $item));
	$keys = array_keys($array);
	$p = array_search($index, $keys);

	if ($p !== FALSE) {
		if ($where === 'before')
			array_splice($keys, max($p, 0), 0, $key);
		else if ($where === 'after')
			array_splice($keys, min($p+1, count($keys)), 0, $key);

		$array = array();
        // Create items array in proper order. The code below was the only
        // way I found to insert an item in an arbitrary position of an
        // array preserving keys. array_splice dropped the key of the inserted
        // value.
		foreach($keys as $key) {
			$array[$key] = $all[$key];
		}
	}

	return $array;
}

function awpcp_array_insert_before($array, $index, $key, $item) {
	return awpcp_array_insert($array, $index, $key, $item, 'before');
}

function awpcp_array_insert_after($array, $index, $key, $item) {
	return awpcp_array_insert($array, $index, $key, $item, 'after');
}

/**
 * @since 3.7.6
 */
function awpcp_array_insert_first( $array, $item_key, $item ) {
    $all_keys = array_keys( $array );
    $first_key = array_shift( $all_keys );

    return awpcp_array_insert( $array, $first_key, $item_key, $item, 'before' );
}

/**
 * Inserts a menu item after one of the existing items.
 *
 * This function should be used by plugins when handling
 * the awpcp_menu_items filter.
 *
 * @param $items 	array 	Existing items
 * @param $after 	string 	key of item we want to place the new
 * 							item after
 * @param $key 		string 	New item's key
 * @param $item 	array 	New item's description
 */
function awpcp_insert_menu_item($items, $after, $key, $item) {
	return awpcp_array_insert_after($items, $after, $key, $item);
}

/**
 * Insert a submenu item in a WordPress admin menu, after an
 * existing item.
 *
 * Menu item should have already been added using add_submenu_page
 * or a similar function.
 *
 * @param $slug		string	Slug for the item to insert.
 * @param $after	string	Slug of the item to insert after.
 */
function awpcp_insert_submenu_item_after($menu, $slug, $after) {
    global $submenu;

    $items = isset($submenu[$menu]) ? $submenu[$menu] : array();
    $to = -1; $from = -1;

    foreach ($items as $k => $item) {
        // insert after Fees
        if (strcmp($item[2], $after) === 0)
            $to = $k;
        if (strcmp($item[2], $slug) === 0)
            $from = $k;
    }

    if ($to >= 0 && $from >= 0) {
        array_splice($items, $to + 1, 0, array($items[$from]));
        // current was added at the end of the array using add_submenu_page
        unset($items[$from + 1]);
        // use array_filter to restore array keys
        $submenu[$menu] = array_filter($items);
    }
}

/**
 * @since 2.1.4
 */
function awpcp_get_page_name($pagename) {
	return get_awpcp_option($pagename);
}

/**
 * @since 3.0.2
 */
function awpcp_get_renew_ad_hash( $ad_id ) {
	return md5( sprintf( 'renew-ad-%d-%s', $ad_id, wp_salt() ) );
}

/**
 * @since 3.0.2
 */
function awpcp_verify_renew_ad_hash( $ad_id, $hash ) {
	return strcmp( awpcp_get_renew_ad_hash( $ad_id ), $hash ) === 0;
}

/**
 * @since 3.0.2
 */
function awpcp_get_email_verification_hash( $ad_id ) {
	return wp_hash( sprintf( 'verify-%d', $ad_id ) );
}

/**
 * @since 3.0.2
 */
function awpcp_verify_email_verification_hash( $ad_id, $hash ) {
	return strcmp( awpcp_get_email_verification_hash( $ad_id ) , $hash ) === 0;
}

/**
 * @since 3.0-beta
 */
function awpcp_get_blog_name($decode_html=true) {
	$blog_name = get_option('blogname');

	if (empty($blog_name)) {
		$blog_name = _x('Classifieds Website', 'default blog title', 'another-wordpress-classifieds-plugin');
	}

	if ( $decode_html ) {
		$blog_name = html_entity_decode( $blog_name, ENT_QUOTES, 'UTF-8' );
	}

	return $blog_name;
}

/**
 * Use AWPCP_Request::post_param when possible.
 */
function awpcp_post_param($name, $default='') {
	return awpcp_array_data($name, $default, $_POST);
}

/**
 * Use AWPCP_Request::param when possible.
 */
function awpcp_request_param($name, $default='', $from=null) {
	return awpcp_array_data($name, $default, is_null($from) ? $_REQUEST : $from);
}

function awpcp_array_data($name, $default, $from=array()) {
	$value = isset($from[$name]) ? $from[$name] : null;

	if (is_array($value) && count($value) > 0) {
		return $value;
	} else if (!empty($value)) {
		return $value;
	}

	return $default;
}

/**
 * Taken and adapted from: http://stackoverflow.com/a/6795671/201354
 */
function awpcp_array_filter_recursive( $input, $callback = null ) {
    foreach ( $input as &$value ) {
        if ( is_array( $value ) ) {
            $value = awpcp_array_filter_recursive( $value, $callback );
        }
    }

    if ( is_callable( $callback ) ) {
        return array_filter( $input, $callback );
    } else {
        return array_filter( $input );
    }
}

/**
 * Alternative to array_merge_recursive that keeps numeric keys.
 *
 * @since 3.4
 */
function awpcp_array_merge_recursive( $a, $b ) {
    $merged = $a;

    foreach ( $b as $key => $value ) {
        if ( isset( $merged[ $key ] ) && is_array( $merged[$key] ) && is_array( $value ) ) {
            $merged[ $key ] = awpcp_array_merge_recursive( $merged[ $key ], $value );
        } else {
            $merged[ $key ] = $value;
        }
    }

    return $merged;
}

function awpcp_get_property($object, $property, $default='') {
    if ( is_object( $object ) && ( isset( $object->$property ) || array_key_exists( $property, get_object_vars( $object ) ) ) ) {
        return $object->$property;
    } else if ( is_array( $object ) && isset( $object[ $property ] ) ) {
        return $object[ $property ];
    }
    return $default;
}

function awpcp_get_properties($objects, $property, $default='') {
	$results = array();
	foreach ($objects as $object) {
		$results[] = awpcp_get_property($object, $property, $default);
	}
	return $results;
}

function awpcp_get_object_property_from_alternatives( $object, $alternatives, $default = '' ) {
    foreach ( (array) $alternatives as $key ) {
        $value = awpcp_get_property( $object, $key );

        if ( strlen( $value ) == 0 ) {
            continue;
        }

        return $value;
    }

    return $default;
}

/**
 * Input:
 *  Array
 *  (
 *      [a] => dosearch
 *      [keywordphrase] =>
 *      [searchcategory] =>
 *      [searchname] =>
 *      [searchpricemin] => 0
 *      [searchpricemax] => 0
 *      [regions] => Array
 *          (
 *              [0] => Array
 *                  (
 *                      [country] => Colombia
 *                      [state] => Boyacá
 *                      [city] => Tunja
 *                  )
 *
 *              [1] => Array
 *                  (
 *                      [country] => Colombia
 *                      [state] => Antioquia
 *                      [city] => Medellín
 *                  )
 *
 *              [2] => Array
 *                  (
 *                      [country] => Colombia
 *                      [state] => Boyacá
 *                      [city] => Tunja
 *                  )
 *
 *          )
 *
 *      [awpcp-test-min] =>
 *      [awpcp-test-max] =>
 *      [awpcp-select_list] =>
 *  )
 *
 * Output:
 * Array
 * (
 *      [a] => dosearch
 *      [keywordphrase] =>
 *      [searchcategory] =>
 *      [searchname] =>
 *      [searchpricemin] => 0
 *      [searchpricemax] => 0
 *      [regions[0][country]] => Colombia
 *      [regions[0][state]] => Boyacá
 *      [regions[0][city]] => Tunja
 *      [regions[1][country]] => Colombia
 *      [regions[1][state]] => Antioquia
 *      [regions[1][city]] => Medellín
 *      [regions[2][country]] => Colombia
 *      [regions[2][state]] => Boyacá
 *      [regions[2][city]] => Tunja
 *      [awpcp-test-min] =>
 *      [awpcp-test-max] =>
 *      [awpcp-select_list] =>
 * )
 * TODO: see WP's _http_build_query
 *
 * @since 3.0.2
 */
function awpcp_flatten_array($array) {
	if ( is_array( $array ) ) {
		$flat = array();
		_awpcp_flatten_array( $array, array(), $flat );
		return $flat;
	} else {
		return $array;
	}
}

/**
 * @since 3.0.2
 */
function _awpcp_flatten_array($array, $path=array(), &$return=array()) {
	if ( is_array( $array ) ) {
		foreach ( $array as $key => $value) {
			_awpcp_flatten_array( $value, array_merge( $path, array( $key ) ), $return );
		}
	} else if ( count( $path ) > 0 ){
		$first = $path[0];
		if ( count( $path ) > 1 ) {
			$return[ $first . '[' . join('][', array_slice( $path, 1 ) ) . ']'] = $array;
		} else {
			$return[ $first ] = $array;
		}
	}
}


/**
 * Parses 'yes', 'true', 'no', 'false', 0, 1 into bool values.
 *
 * @since  2.1.3
 * @param  mixed	$value	value to parse
 * @return bool
 */
function awpcp_parse_bool($value) {
	$lower = strtolower($value);
	if ($lower === 'true' || $lower === 'yes')
		return true;
	if ($lower === 'false' || $lower === 'no')
		return false;
	return $value ? true : false;
}

function awpcp_get_currency_code() {
    $currency_code = get_awpcp_option( ''. 'currency-code' );

    if ( function_exists( 'mb_strtoupper' ) ) {
        return mb_strtoupper( $currency_code );
    } else {
        return strtoupper( $currency_code );
    }
}


/**
 * XXX: Referenced in FAQ: http://awpcp.com/forum/faq/why-doesnt-my-currency-code-change-when-i-set-it/
 */
function awpcp_get_currency_symbol() {
    $currency_symbol = get_awpcp_option( 'currency-symbol' );

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

	$currency_code = awpcp_get_currency_code();

    foreach ( awpcp_currency_symbols() as $currency_symbol => $currency_codes ) {
        if ( in_array( $currency_code, $currency_codes ) ) {
            return $currency_symbol;
        }
    }

    return $currency_code;
}

/**
 * @since 3.4
 */
function awpcp_currency_symbols() {
    return array(
        '$' => array( 'CAD', 'AUD', 'NZD', 'SGD', 'HKD', 'USD', 'MXN' ),
        '¥' => array( 'JPY' ),
        '€' => array( 'EUR' ),
        '£' => array( 'GBP' ),
        '₽;' => array( 'RUB' ),
        'R$' => array( 'BRL' ),
        'Kč' => array( 'CZK' ),
        'kr.' => array( 'DKK' ),
        '₪' => array( 'ILS' ),
        'RM' => array( 'MYR' ),
        'kr' => array( 'NOK', 'SEK' ),
        '₱' => array( 'PHP' ),
        'CHF' => array( 'CHF' ),
        'NT$' => array( 'TWD' ),
        '฿' => array( 'THB' ),
        '₺' => array( 'TRY' ),
    );
}

/**
 * @since 3.0
 */
function awpcp_format_money($value) {
    if ( get_awpcp_option( 'show-currency-symbol' ) != 'do-not-show-currency-symbol' ) {
        $show_currency_symbol = true;
    } else {
        $show_currency_symbol = false;
    }

    return awpcp_get_formmatted_amount( $value, $show_currency_symbol );
}

function awpcp_format_money_without_currency_symbol( $value ) {
    return awpcp_get_formmatted_amount( $value, false );
}

function awpcp_get_formmatted_amount( $value, $include_symbol ) {
    $symbol_position = get_awpcp_option( 'show-currency-symbol' );
    $symbol = $include_symbol ? awpcp_get_currency_symbol() : '';

    if ( get_awpcp_option( 'include-space-between-currency-symbol-and-amount' ) ) {
        $separator = ' ';
    } else {
        $separator = '';
    }

    if ( $include_symbol && $symbol_position == 'show-currency-symbol-on-left' ) {
        $formatted = '<currenct-symbol><separator><amount>';
    } else if ( $include_symbol && $symbol_position == 'show-currency-symbol-on-right' ) {
        $formatted = '<amount><separator><currenct-symbol>';
    } else {
        $formatted = '<amount>';
    }

    $formatted = str_replace( '<currenct-symbol>', $symbol, $formatted );
    $formatted = str_replace( '<amount>', awpcp_format_number( $value ), $formatted );
    $formatted = str_replace( '<separator>', $separator, $formatted );

    return $value >= 0 ? $formatted : "($formatted)";
}

function awpcp_format_number( $value, $decimals = null ) {
    return awpcp_get_formatted_number( $value, $decimals = get_awpcp_option( 'show-decimals' ) ? 2 : 0 );
}

function awpcp_get_formatted_number( $value, $decimals = 0 ) {
    $thousands_separator = get_awpcp_option( 'thousands-separator' );
    $decimal_separator = get_awpcp_option( 'decimal-separator' );

    $formatted = number_format( abs( $value ), $decimals, '~', '^' );
    $formatted = str_replace( '~', $decimal_separator, $formatted );
    $formatted = str_replace( '^', $thousands_separator, $formatted );

    return $formatted;
}

function awpcp_format_integer( $value ) {
    return awpcp_get_formatted_number( $value, $decimals = 0 );
}

/**
 * @since 3.7.5
 */
function awpcp_parse_number( $value, $decimal_separator = false, $thousands_separator = false ) {
    if ( strlen( $value ) === 0 ) return false;

    $thousands_separator = $thousands_separator ? $thousands_separator : get_awpcp_option('thousands-separator');
    $decimal_separator = $decimal_separator ? $decimal_separator : get_awpcp_option('decimal-separator');

    $pattern = '/^-?(?:\d+|\d{1,3}(?:' . preg_quote( $thousands_separator ) . '\\d{3})+)?(?:' . preg_quote( $decimal_separator ) . '\\d+)?$/';

    if ( preg_match( $pattern, $value ) ) {
        $value = str_replace($thousands_separator, '', $value);
        $value = str_replace($decimal_separator, '.', $value);
        $number = floatval($value);
    } else {
        $number = false;
    }

    return $number;
}

/**
 * @since 3.0
 */
function awpcp_parse_money($value, $decimal_separator=false, $thousands_separator=false) {
    return awpcp_parse_number( $value, $decimal_separator, $thousands_separator );
}


/**
 * @since 2.1.4
 */
function awpcp_get_flash_messages() {
	if ( ! is_user_logged_in() ) {
        return array();
    }

    if ( $messages = get_user_option( 'awpcp-messages', get_current_user_id() ) ) {
        return $messages;
    }

    return array();
}

/**
 * @since 2.1.4
 */
function awpcp_update_flash_messages($messages) {
	if (is_user_logged_in()) {
		return update_user_option(get_current_user_id(), 'awpcp-messages', $messages);
	} else {
        return true;
	}
}

/**
 * @since 2.1.4
 */
function awpcp_clear_flash_messages() {
    if ( ! is_user_logged_in() ) {
        return true;
    }

    return delete_user_option( get_current_user_id(), 'awpcp-messages' );
}

function awpcp_flash( $message, $class = array( 'awpcp-updated', 'updated') ) {
	$messages = awpcp_get_flash_messages();

    if ( ! awpcp_is_duplicated_flash_message( $messages, $message, $class ) ) {
        $messages[] = array( 'message' => $message, 'class' => (array) $class );
        awpcp_update_flash_messages( $messages );
    }
}

function awpcp_is_duplicated_flash_message( $messages, $message, $class ) {
    foreach ( $messages as $m ) {
        if ( strcmp( $m['message'], $message ) == 0 ) {
            return true;
        }
    }

    return false;
}

/**
 */
function awpcp_print_messages() {
 	// The function is expected to be called only once per request. However,
 	// due to special circumstances it is possible that the function is called
 	// twice or more, usually with the results from the last call being the ones
 	// shown to the user. In those cases, the messages would be lost unless we
 	// cache the messages during the request. That's why we use a static $messages
 	// variable.
	static $messages = null;
	$messages = is_null($messages) ? awpcp_get_flash_messages() : $messages;

	foreach ($messages as $message) {
		echo awpcp_print_message($message['message'], $message['class']);
	}

	awpcp_clear_flash_messages();
}

function awpcp_print_form_errors( $errors ) {
    foreach ( $errors as $index => $error ) {
        if ( is_numeric( $index ) ) {
            echo awpcp_print_message( $error, array( 'awpcp-error', 'notice', 'notice-error' ) );
        } else {
            echo awpcp_print_message( $error, array( 'awpcp-error', 'notice', 'notice-error', 'ghost' ) );
        }
    }
}

function awpcp_print_message( $message, $class = array( 'awpcp-updated', 'notice', 'notice-info' ) ) {
    if ( is_string( $class ) ) {
        $class = array( $class );
    }

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

	$class = array_merge(array('awpcp-message'), $class);
	return '<div class="' . join(' ', $class) . '"><p>' . $message . '</p></div>';
}

function awpcp_print_error($message) {
	return awpcp_print_message($message, array('error'));
}

/**
 * @since 3.7.4
 */
function awpcp_render_warning( $message ) {
    return awpcp_print_message( $message, array( 'awpcp-warning', 'notice', 'notice-warning' ) );
}

function awpcp_validate_error($field, $errors) {
	$error = awpcp_array_data($field, '', $errors);
	if (empty($error))
		return '';
	return '<label for="' . $field . '" generated="true" class="error" style="">' . $error . '</label>';
}

function awpcp_form_error($field, $errors) {
	$error = awpcp_array_data($field, '', $errors);
	return empty($error) ? '' : '<span class="awpcp-error">' . $error . '</span>';
}

function awpcp_form_help_text( $field_id, $help_text ) {
    if ( empty( $help_text ) ) {
        return null;
    }

    $params = wp_parse_args( $params, array(
        'text' => $help_text,
        'attributes' => array(
            'for' => $field_id,
            'class' => array( 'helptext', 'awpcp-form-helptext' ),
        ),
    ) );

    return awpcp_html_label( $params );
}

function awpcp_attachment_background_color_explanation() {
	if ( get_awpcp_option( 'imagesapprove' ) ) {
		return '<p>' . __( 'The images or files with pale red background have been rejected by an administrator user. Likewise, files with a pale yellow background are awaiting approval. Files that are awaiting approval and rejected files, cannot be shown in the frontend.', 'another-wordpress-classifieds-plugin' ) . '</p>';
	} else {
		return '';
	}
}

/**
 * @since 3.0.2
 * @deprecated since 3.2.3
 */
function awpcp_module_not_compatible_notice( $module, $installed_version ) {
    _deprecated_function( __FUNCTION__, '3.2.3', 'ModulesManager::show_module_not_compatible_notice()' );
	global $awpcp_db_version;

	$modules = awpcp()->get_premium_modules_information();

	$name = $modules[ $module ][ 'name' ];
	$required_version = $modules[ $module ][ 'required' ];

	$message = __( 'This version of AWPCP %1$s module is not compatible with AWPCP version %2$s. Please get AWPCP %1$s %3$s or newer!', 'another-wordpress-classifieds-plugin' );
	$message = sprintf( $message, '<strong>' . $name . '</strong>', $awpcp_db_version, '<strong>' . $required_version . '</strong>' );
    $message = sprintf( '<strong>%s:</strong> %s', __( 'Error', 'another-wordpress-classifieds-plugin' ), $message );

    return awpcp_print_error( $message );
}

/**
 * Use awpcp_html_attributes instead.
 *
 * @deprecated since next-release
 */
function awpcp_render_attributes($attrs) {
    $attributes = array();
    foreach ($attrs as $name => $value) {
        if (is_array($value))
            $value = join(' ', array_filter($value, 'strlen'));
        $attributes[] = sprintf('%s="%s"', $name, esc_attr($value));
    }
    return join(' ', $attributes);
}

/**
 * @since next-release
 */
function awpcp_html_attributes( $attributes ) {
    $output = array();

    if ( isset( $attributes['class'] ) && is_array( $attributes['class'] ) ) {
        $attributes['class'] = implode( ' ', array_filter( $attributes['class'], 'strlen' ) );
    }

    foreach ( $attributes as $name => $value ) {
        $output[] = sprintf( '%s="%s"', $name, $value );
    }

    return implode( ' ', $output );
}

function awpcp_html_hidden_fields( $fields ) {
    $output = array();

    foreach ( array_filter( awpcp_flatten_array( $fields ) ) as $name => $value ) {
        if ( is_object( $value ) ) {
            continue;
        }

        $output[] = '<input type="hidden" name="' . esc_attr( $name ) . '" value="' . esc_attr( $value ) . '" />';
    }

    return implode( "\n", $output );
}

/**
 * @since next-release
 */
function awpcp_html_image( $params ) {
    $params = wp_parse_args( $params, array(
        'attributes' => array(
            'alt' => null,
            'title' => null,
            'src' => null,
            'width' => null,
            'height' => null,
            'style' => null,
        ),
    ) );

    $attributes = rtrim( ' ' . awpcp_html_attributes( $params['attributes'] ) );
    $element = str_replace( '<attributes>', $attributes, '<img<attributes>/>' );

    return $element;
}

/**
 * @since 3.6
 */
function awpcp_html_label( $params ) {
    $params = wp_parse_args( $params, array(
        'text' => null,
        'attributes' => array(
            'for' => null,
        ),
    ) );

    $attributes = rtrim( ' ' . awpcp_html_attributes( $params['attributes'] ) );

    $element = '<label <attributes>><text></label>';
    $element = str_replace( '<attributes>', $attributes, $element );
    $element = str_replace( '<text>', $params['text'], $element );

    return $element;
}

/**
 * @since 3.6
 */
function awpcp_html_text_field( $params ) {
    $params = awpcp_parse_html_params(
        $params,
        array(
            'required' => null,
            'readonly' => null,
        )
    );

    if ( $params['readonly'] ) {
        $attributes['readonly'] = 'readonly';
    }

    $params['attributes']['type'] = 'text';

    return awpcp_html_input( $params );
}

/**
 * @since 3.6
 */
function awpcp_html_input( $params ) {
    $attributes = rtrim( ' ' . awpcp_html_attributes( $params['attributes'] ) );
    $element = str_replace( '<attributes>', $attributes, '<input <attributes>/>' );
    return $element;
}

/**
 * @since 3.6
 */
function awpcp_html_radio( $params ) {
    $params = awpcp_parse_html_params(
        $params,
        array(
            'current-value' => null,
            'disabled' => null,
        ),
        array(
            'value' => null,
        )
    );

    if ( $params['disabled'] ) {
        $params['attributes']['disabled'] = 'disabled';
    }

    if ( $params['current-value'] === $params['attributes']['value'] ) {
        $params['attributes']['checked'] = 'checked';
    }

    $params['attributes']['type'] = 'radio';

    return awpcp_html_input( $params );
}

/**
 * @since 3.6
 */
function awpcp_html_select( $params ) {
    $params = awpcp_parse_html_params( $params );

    $attributes = rtrim( ' ' . awpcp_html_attributes( $params['attributes'] ) );

    $element = '<select <select-attributes>><options></select>';
    $element = str_replace( '<select-attributes>', $attributes, $element );
    $element = str_replace( '<options>', awpcp_html_options( $params ), $element );

    return $element;
}

/**
 * @since 3.6
 */
function awpcp_html_options( $params ) {
    $params = wp_parse_args( $params, array(
        'current-value' => null,
        'options' => array(),
    ) );

    $options = array();

    foreach ( $params['options'] as $value => $text ) {
        $option = '<option <attributes>><text></option>';

        if ( strcmp( $value, $params['current-value'] ) === 0 ) {
            $attributes = array( 'value' => $value, 'selected' => 'selected' );
        } else {
            $attributes = array( 'value' => $value );
        }

        $option = str_replace( '<attributes>', awpcp_html_attributes( $attributes ), $option );
        $option = str_replace( '<text>', $text, $option );

        $options[] = $option;
    }

    return implode( '', $options );
}

/**
 * @since 3.6
 */
function awpcp_parse_html_params( $params, $default_params = array(), $default_attributes = array() ) {
    $params = wp_parse_args(
        $params,
        wp_parse_args(
            $default_params,
            array(
                'required' => null,
                'attributes' => array(),
            )
        )
    );

    $params['attributes'] = awpcp_parse_html_attributes( $params['attributes'], $default_attributes );

    if ( $params['required'] ) {
        $attributes['class'][] = 'required';
    }

    return $params;
}

function awpcp_parse_html_attributes( $attributes, $default_attributes = array() ) {
    $attributes = wp_parse_args(
        $attributes,
        wp_parse_args(
            $default_attributes,
            array(
                'class' => array(),
            )
        )
    );

    if ( ! is_array( $attributes['class'] ) ) {
        $attributes['class'] = explode( ' ', $attributes['class'] );
    }

    return $attributes;
}

/**
 * @since 3.6
 */
function awpcp_html_postbox_handle( $params ) {
    $default_params = array(
        'heading_attributes' => array(),
        'span_attributes' => array(),
        'heading_class' => 'hndle',
        'heading_tag' => null,
        'content' => '',
    );

    $params = wp_parse_args( $params, $default_params );
    $params['heading_attributes'] = awpcp_parse_html_attributes( $params['heading_attributes'] );
    $params['span_attributes'] = awpcp_parse_html_attributes( $params['span_attributes'] );

    if ( ! in_array( $params['heading_class'], $params['heading_attributes']['class'] ) ) {
        $params['heading_attributes']['class'][] = $params['heading_class'];
    }

    if ( is_null( $params['heading_tag'] ) ) {
        $params['heading_tag'] = awpcp_html_admin_second_level_heading_tag();
    }

    $element = '<<heading-tag> <heading-attributes>><span <span-attributes>><content></span></<heading-tag>>';
    $element = str_replace( '<heading-tag>', $params['heading_tag'], $element );
    $element = str_replace( '<heading-attributes>', awpcp_html_attributes( $params['heading_attributes'] ), $element );
    $element = str_replace( '<span-attributes>', awpcp_html_attributes( $params['span_attributes'] ), $element );
    $element = str_replace( '<content>', $params['content'], $element );

    return $element;
}

/**
 * @since 3.6
 */
function awpcp_html_admin_first_level_heading( $params ) {
    $params['tag'] = awpcp_html_admin_first_level_heading_tag();
    return awpcp_html_heading( $params );
}

/**
 * See:
 * - https://make.wordpress.org/core/2015/07/31/headings-in-admin-screens-change-in-wordpress-4-3/
 *
 * @since 3.6
 */
function awpcp_html_admin_first_level_heading_tag() {
    if ( version_compare( get_bloginfo('version'), '4.3-beta1', '<' ) ) {
        return 'h2';
    } else {
        return 'h1';
    }
}

/**
 * @since 3.6
 */
function awpcp_html_admin_second_level_heading( $params ) {
    $params['tag'] = awpcp_html_admin_second_level_heading_tag();
    return awpcp_html_heading( $params );
}

/**
 * See:
 * - https://make.wordpress.org/core/2015/10/28/headings-hierarchy-changes-in-the-admin-screens/
 *
 * @since 3.6
 */
function awpcp_html_admin_second_level_heading_tag() {
    if ( version_compare( get_bloginfo('version'), '4.4-beta1', '<' ) ) {
        return 'h3';
    } else {
        return 'h2';
    }
}

/**
 * @access private
 * @since 3.6
 */
function awpcp_html_heading( $params ) {
    $default_params = array(
        'tag' => 'h1',
        'attributes' => array(),
        'content' => '',
    );

    $params = wp_parse_args( $params, $default_params );
    $params['attributes'] = awpcp_parse_html_attributes( $params['attributes'] );

    $element = '<<heading-tag> <heading-attributes>><content></<heading-tag>>';
    $element = str_replace( '<heading-tag>', $params['tag'], $element );
    $element = str_replace( '<heading-attributes>', awpcp_html_attributes( $params['attributes'] ), $element );
    $element = str_replace( '<content>', $params['content'], $element );

    return $element;
}

function awpcp_uploaded_file_error($file) {
	$upload_errors = array(
		UPLOAD_ERR_OK        	=> __("No errors.", 'another-wordpress-classifieds-plugin'),
		UPLOAD_ERR_INI_SIZE    	=> __("The file is larger than upload_max_filesize.", 'another-wordpress-classifieds-plugin'),
		UPLOAD_ERR_FORM_SIZE    => __("The file is larger than form MAX_FILE_SIZE.", 'another-wordpress-classifieds-plugin'),
		UPLOAD_ERR_PARTIAL    	=> __("The file was only partially uploaded.", 'another-wordpress-classifieds-plugin'),
		UPLOAD_ERR_NO_FILE      => __("No file was uploaded.", 'another-wordpress-classifieds-plugin'),
		UPLOAD_ERR_NO_TMP_DIR   => __("Missing temporary directory.", 'another-wordpress-classifieds-plugin'),
		UPLOAD_ERR_CANT_WRITE   => __("Can't write file to disk.", 'another-wordpress-classifieds-plugin'),
		UPLOAD_ERR_EXTENSION    => __("The file upload was stopped by extension.", 'another-wordpress-classifieds-plugin')
	);

	return array($file['error'], $upload_errors[$file['error']]);
}

function awpcp_get_file_extension( $filename ) {
	return strtolower( awpcp_utf8_pathinfo( $filename, PATHINFO_EXTENSION ) );
}

/**
 * Recursively remove a directory.
 * @since 3.0.2
 */
function awpcp_rmdir($dir) {
	if ( is_dir( $dir ) ) {
		$objects = scandir( $dir );
		foreach ( $objects as $object ) {
			if ( $object != "." && $object != ".." ) {
				if ( filetype( $dir . "/" . $object ) == "dir" ) {
					awpcp_rmdir( $dir . "/" . $object );
				} else {
					unlink( $dir . "/" . $object );
				}
			}
		}
		reset( $objects );
		rmdir( $dir );
	}
}


/**
 * @since 3.0.2
 */
function awpcp_directory_permissions() {
	return intval( get_awpcp_option( 'upload-directory-permissions', '0755' ), 8 );
}


/**
 * @since 2.0.7
 */
function awpcp_table_exists($table) {
    global $wpdb;
    $result = $wpdb->get_var("SHOW TABLES LIKE '" . $table . "'");
    return strcasecmp($result, $table) === 0;
}

/**
 * TODO: move memoization to where the information is needed. Having it here is the perfect
 *          scenarion for hard to track bugs.
 * @since  2.1.4
 */
function awpcp_column_exists($table, $column) {
    static $column_exists = array();

    if ( ! isset( $column_exists[ "$table-$column" ] ) ) {
        $column_exists[ "$table-$column" ] = awpcp_check_if_column_exists( $table, $column );
    }

    return $column_exists[ "$table-$column" ];
}

/**
 * @since 3.4
 */
function awpcp_check_if_column_exists( $table, $column ) {
    global $wpdb;

    $suppress_errors = $wpdb->suppress_errors();
    $result = $wpdb->query("SELECT `$column` FROM $table");
    $wpdb->suppress_errors( $suppress_errors );

    return $result !== false;
}


/** Email functions
 ---------------------------------------------------------------------------- */

/**
 * Extracted from class-phpmailer.php (PHPMailer::EncodeHeader).
 *
 * XXX: This may be necessary only for email addresses used in the Reply-To header.
 *
 * @since 3.0.2
 */
function awpcp_encode_address_name($str) {
    return awpcp_phpmailer()->encodeHeader( $str, 'phrase' );
}

/**
 * Returns or creates an instance of PHPMailer.
 *
 * Extracted from wp_mail()'s code.
 *
 * @since 3.4
 */
function awpcp_phpmailer() {
    global $phpmailer;

    // (Re)create it, if it's gone missing
    if ( !is_object( $phpmailer ) || !is_a( $phpmailer, 'PHPMailer' ) ) {
        require_once ABSPATH . WPINC . '/class-phpmailer.php';
        require_once ABSPATH . WPINC . '/class-smtp.php';
        $phpmailer = new PHPMailer( true );
    }

    $phpmailer->CharSet = apply_filters( 'wp_mail_charset', get_bloginfo( 'charset' ) );

    return $phpmailer;
}

/**
 * @since 3.0.2
 */
function awpcp_format_email_address($address, $name) {
	return awpcp_encode_address_name( $name ) . " <" . $address . ">";
}

/**
 * @since 3.7.1
 */
function awpcp_format_recipient_address( $email_address, $name = false ) {
    if ( $name && get_awpcp_option( 'include-recipient-name-in-email-address' ) ) {
        return awpcp_format_email_address( $email_address, $name );
    }

    return $email_address;
}

/**
 * Return the email address that should receive the notifications intented for
 * administrator users.
 *
 * @since	3.0
 * @return	string	email address
 */
function awpcp_admin_recipient_email_address() {
	$email_address = get_awpcp_option( 'admin-recipient-email' );
	if ( empty( $email_address ) ) {
		$email_address = get_option( 'admin_email' );
	}

	return $email_address;
}

/**
 * Return the email address used as the sender for email notifications.
 *
 * @since	3.0
 * @return	string	email address
 */
function awpcp_admin_sender_email_address($include_contact_name=false) {
    if ( awpcp_get_option( 'sent-emails-using-wordpress-email-address' ) ) {
        $email_address = sprintf( 'wordpress@%s', awpcp_request()->domain( false ) );
    } else if ( strlen( get_awpcp_option( 'awpcpadminemail' ) ) > 0 ) {
        $email_address = get_awpcp_option( 'awpcpadminemail' );
    } else {
        $email_address = get_option( 'admin_email' );
    }

	return $email_address;
}

/**
 * @since next-release
 */
function awpcp_admin_sender_name() {
    if ( awpcp_get_option( 'sent-emails-using-wordpress-email-address' ) ) {
        $sender_name = 'WordPress';
    } else {
        $sender_name = awpcp_get_blog_name();
    }

    return $sender_name;
}

/**
 * Return the name and email address of the account that appears as the sender in
 * email notifications.
 *
 * @since	3.0
 * @return	string	name <email@address>
 */
function awpcp_admin_email_from() {
    $email_address = awpcp_admin_sender_email_address();
    $sender_name = awpcp_admin_sender_name();

    return awpcp_format_email_address( $email_address, $sender_name );
}

/**
 * Return the name and email address of the account that should receive notifications intented for
 * administrator users.
 *
 * @since	3.0
 * @return	string	name <email@address>
 */
function awpcp_admin_email_to() {
	return awpcp_format_recipient_address( awpcp_admin_recipient_email_address(), awpcp_get_blog_name() );
}

function awpcp_moderators_email_to() {
    $email_addresses = array();

    $users = awpcp_users_collection()->find( array(
        'fields' => array( 'public_name', 'user_email' ),
        'role' => 'awpcp-moderator'
    ) );

    foreach ( $users as $user ) {
        $email_addresses[] = awpcp_format_recipient_address( $user->user_email, $user->public_name );
    }

    return $email_addresses;
}

/**
 * @since  2.1.4
 */
function awpcp_ad_enabled_email($ad) {
	// user email
	$mail = new AWPCP_Email;
	$mail->to[] = awpcp_format_recipient_address( $ad->ad_contact_email, $ad->ad_contact_name );
	$mail->subject = sprintf(__('Your Ad "%s" has been approved', 'another-wordpress-classifieds-plugin'), $ad->get_title());

	$template = AWPCP_DIR . '/frontend/templates/email-ad-enabled-user.tpl.php';
	$mail->prepare($template, compact('ad'));

	$mail->send();
}

/**
 * @since 3.0.2
 */
function awpcp_ad_updated_user_email( $ad, $message ) {
	$admin_email = awpcp_admin_recipient_email_address();

	$mail = new AWPCP_Email;
	$mail->to[] = awpcp_format_recipient_address( $ad->ad_contact_email, $ad->ad_contact_name );
	$mail->subject = sprintf(__('Your Ad "%s" has been successfully updated', 'another-wordpress-classifieds-plugin'), $ad->get_title());

	$template = AWPCP_DIR . '/frontend/templates/email-ad-updated-user.tpl.php';
	$mail->prepare($template, compact('ad', 'message', 'admin_email'));

	return $mail;
}


function awpcp_ad_updated_email( $ad, $message ) {
	// user email
	$mail = awpcp_ad_updated_user_email( $ad, $message );
	return $mail->send();
}

function awpcp_ad_awaiting_approval_email($ad, $ad_approve, $images_approve) {
	// admin email
	$params = array( 'page' => 'awpcp-listings',  'action' => 'manage-images', 'id' => $ad->ad_id );
    $manage_images_url = add_query_arg( urlencode_deep( $params ), admin_url( 'admin.php' ) );

	if ( false == $ad_approve && $images_approve ) {
		$subject = __( 'Images on Ad "%s" are awaiting approval', 'another-wordpress-classifieds-plugin' );

		$message = __( 'Images on Ad "%s" are awaiting approval. You can approve the images going to the Manage Images section for that Ad and clicking the "Enable" button below each image. Click here to continue: %s.', 'another-wordpress-classifieds-plugin');
		$messages = array( sprintf( $message, $ad->get_title(), $manage_images_url ) );
	} else {
		$subject = __( 'The Ad "%s" is awaiting approval', 'another-wordpress-classifieds-plugin' );

		$message = __('The Ad "%s" is awaiting approval. You can approve the Ad going to the Manage Listings section and clicking the "Enable" action shown on top. Click here to continue: %s.', 'another-wordpress-classifieds-plugin');
		$params = array('page' => 'awpcp-listings',  'action' => 'view', 'id' => $ad->ad_id);
	    $url = add_query_arg( urlencode_deep( $params ), admin_url( 'admin.php' ) );

	    $messages[] = sprintf( $message, $ad->get_title(), $url );

	    if ( $images_approve ) {
		    $message = __( 'Additionally, You can approve the images going to the Manage Images section for that Ad and clicking the "Enable" button below each image. Click here to continue: %s.', 'another-wordpress-classifieds-plugin' );
		    $messages[] = sprintf( $message, $manage_images_url );
		}
	}

	$mail = new AWPCP_Email;
	$mail->to[] = awpcp_admin_email_to();
	$mail->subject = sprintf( $subject, $ad->get_title() );

	$template = AWPCP_DIR . '/frontend/templates/email-ad-awaiting-approval-admin.tpl.php';
	$mail->prepare( $template, compact( 'messages' ) );

	$mail->send();
}

/** Table Helper related functions
 ---------------------------------------------------------------------------- */

function awpcp_register_column_headers($screen, $columns, $sortable=array()) {
	$wp_list_table = new AWPCP_List_Table($screen, $columns, $sortable);
}

function awpcp_print_column_headers($screen, $id = true, $sortable=array()) {
	$wp_list_table = new AWPCP_List_Table($screen, array(), $sortable);
	$wp_list_table->print_column_headers($id);
}

/**
 * @since 3.3
 */
function awpcp_enqueue_main_script() {
    wp_enqueue_script( 'awpcp' );
}

/**
 * @since 3.3
 */
function awpcp_maybe_add_thickbox() {
    if ( get_awpcp_option( 'awpcp_thickbox_disabled' ) ) {
        return;
    }

    add_thickbox();
}


/**
 * @since 3.2.1
 * @since 3.9.2     Modified to use load_plugin_textdomain() in preparation for
 *                  adding support for Language Packs.
 */
function awpcp_load_plugin_textdomain( $__file__ ) {
    $basename = dirname( plugin_basename( $__file__ ) );

    $locale = function_exists( 'determined_locale' ) ? determined_locale() : get_locale();
    $locale = apply_filters( 'plugin_locale', $locale, 'another-wordpress-classifieds-plugin' );

    // Try to load translations from WP_LANG_DIR /<plugin-slug>/another-wordpress-classifieds-plugin-$locale.mo.
    $mofile = WP_LANG_DIR . "/$basename/another-wordpress-classifieds-plugin-$locale.mo";
    load_textdomain( 'another-wordpress-classifieds-plugin', $mofile );

    /**
     * Try to load translations from the following locations:
     *
     * - WP_LANG_DIR /<plugin-slug>/another-wordpress-classifieds-plugin-$locale.mo
     * - WP_PLUGIN_DIR /<plugin-slug>/languages/another-wordpress-classifieds-plugin-$locale.mo
     */
    load_plugin_textdomain( 'another-wordpress-classifieds-plugin', false, "$basename/languages/" );

    // Try to load translations from WP_PLUGIN_DIR /<plugin-slug>/another-wordpress-classifieds-plugin-$locale.mo.
    $mofile = WP_PLUGIN_DIR . "/$basename/another-wordpress-classifieds-plugin-$locale.mo";
    load_textdomain( 'another-wordpress-classifieds-plugin', $mofile );

    if ( ! awpcp_is_textdomain_loaded( 'another-wordpress-classifieds-plugin' ) ) {
        // Attempt to load translations from file using old text domain.
        awpcp_load_text_domain_with_file_prefix( $__file__, 'another-wordpress-classifieds-plugin', 'AWPCP' );
    }
}

/**
 * Attempts to load translations from the following locations:
 *
 * - WP_LANG_DIR /plugins/$file_prefix-$locale.mo
 * - WP_LANG_DIR /<plugin-slug>/$file_prefix-$locale.mo
 * - WP_PLUGIN_DIR /<plugin-slug>/languages/$file_prefix-$locale.mo
 * - WP_PLUGIN_DIR /<plugin-slug>/$file_prefix-$locale.mo
 *
 * TODO: Do we really need to load files from all those locations? Isn't all that verifications too exepensive?
 *       Having all that options is confusing. We should support the standard ones only.
 *
 * @since 3.5.3.2
 */
function awpcp_load_text_domain_with_file_prefix( $__file__, $text_domain, $file_prefix ) {
    $basename = dirname( plugin_basename( $__file__ ) );

    $locale = function_exists( 'determined_locale' ) ? determined_locale() : get_locale();
    $locale = apply_filters( 'plugin_locale', $locale, $text_domain );

    // Load user translation from wp-content/languages/plugins/$domain-$locale.mo
    $mofile = WP_LANG_DIR . '/plugins/' . $file_prefix . '-' . $locale . '.mo';
    if ( file_exists( $mofile ) ) {
        load_textdomain( $text_domain, $mofile );
    }

    // Load user translation from wp-content/languages/another-wordpress-classifieds-plugin/$domain-$locale.mo
    $mofile = WP_LANG_DIR . '/' . $basename . '/' . $file_prefix . '-' . $locale . '.mo';
    if ( file_exists( $mofile ) ) {
        load_textdomain( $text_domain, $mofile );
    }

    // Load translation included in plugin's languages directory. Stop if the file is loaded.
    $mofile = WP_PLUGIN_DIR . '/' . $basename . '/languages/' . $file_prefix . '-' . $locale . '.mo';
    if ( file_exists( $mofile ) ) {
        load_textdomain( $text_domain, $mofile );
    }

    // Try loading the translations from the plugin's root directory.
    $mofile = WP_PLUGIN_DIR . '/' . $basename . '/' . $file_prefix . '-' . $locale . '.mo';
    if ( file_exists( $mofile ) ) {
        load_textdomain( $text_domain, $mofile );
    }
}

/**
 * @since 3.6.4
 */
function awpcp_is_textdomain_loaded( $text_domain ) {
    return ! is_a( get_translations_for_domain( $text_domain ), 'NOOP_Translations' );
}

function awpcp_utf8_strlen( $string ) {
	if ( function_exists( 'mb_strlen' ) ) {
		return mb_strlen( $string, 'UTF-8' );
	} else {
		return preg_match_all( '(.)su', $string, $matches );
	}
}

function awpcp_utf8_substr( $string, $start, $length=null ) {
	if ( function_exists( 'mb_substr' ) ) {
		return mb_substr( $string, $start, $length, 'UTF-8' );
	} else {
		return awpcp_utf8_substr_pcre( $string, $start, $length );
	}
}

function awpcp_utf8_substr_pcre( $string, $start, $length=null ) {
	if ( is_null( $length ) ) {
		$length = awpcp_utf8_strlen( $string ) - $start;
	}

	if ( preg_match_all( '/.{' . $start . '}(.{' . $length . '})/su', $string, $matches ) ) {
		return $matches[1][0];
	} else {
		return '';
	}
}

function awpcp_remove_utf8_non_characters( $content ) {
    //remove EFBFBD (Replacement Character)
    $content = trim( str_replace( "\xEF\xBF\xBD", '', $content ) );
    // remove BOM character
    $content = trim( str_replace( "\xEF\xBB\xBF", '', $content ) );
    $content = trim( str_replace( "\xEF\xBF\xBE", '', $content ) );

    return $content;
}

function awpcp_maybe_convert_to_utf8( $content ) {
    if ( ! function_exists( 'iconv' ) ) {
        return $content;
    }

    $encoding = awpcp_detect_encoding( $content );

    if ( $encoding && 'UTF-8' != $encoding ) {
        $converted_content = iconv( $encoding, 'UTF-8', $content );
    } else {
        $converted_content = $content;
    }

    return $converted_content;
}

/**
 * @since 3.6
 */
function awpcp_detect_encoding( $content ) {
    static $encodings = array(
        'UTF-8', 'ASCII',
        'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3', 'ISO-8859-4', 'ISO-8859-5',
        'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', 'ISO-8859-9', 'ISO-8859-10',
        'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'ISO-8859-16',
        'Windows-1251', 'Windows-1252', 'Windows-1254',
    );

    if ( function_exists( 'mb_detect_encoding' ) ) {
        return mb_detect_encoding( $content, $encodings, true );
    } else {
        return awpcp_mb_detect_encoding( $content, $encodings, true );
    }
}

/**
 * http://php.net/manual/en/function.mb-detect-encoding.php#113983
 * @since 3.6.0
 */
function awpcp_mb_detect_encoding( $conent, $encodings ) {
    if ( ! function_exists( 'iconv' ) ) {
        return false;
    }

    foreach ( $encodings as $encoding ) {
        $sample = iconv( $encoding, $encoding, $string );
        if ( md5( $sample ) == md5( $string ) ) {
            return $encoding;
        }
    }

    return false;
}

/**
 * from http://stackoverflow.com/a/4459219/201354.
 *
 * @since 3.3
 */
function awpcp_utf8_pathinfo( $path, $path_parts_types = null ) {
    $modified_path = awpcp_add_path_prefix( $path );
    $path_parts = is_null( $path_parts_types ) ? pathinfo( $modified_path ) : pathinfo( $modified_path, $path_parts_types );
    $path_parts = awpcp_remove_path_prefix( $path_parts, $path_parts_types );

    return $path_parts;
}

function awpcp_add_path_prefix( $path, $prefix = '_629353a' ) {
    if ( strpos( $path, '/' ) === false ) {
        $modified_path = $prefix . $path;
    } else {
        $modified_path = str_replace( '/', "/$prefix", $path );
    }

    return $modified_path;
}

function awpcp_remove_path_prefix( $path_parts, $path_part_type, $prefix = '_629353a' ) {
    if ( is_array( $path_parts ) ) {
        foreach ( $path_parts as $key => $value ) {
            $path_parts[ $key ] = str_replace( $prefix, '', $value );
        }
    } else if ( is_string( $path_parts ) ) {
        $path_parts = str_replace( $prefix, '', $path_parts );
    }

    return $path_parts;
}

function awpcp_utf8_basename( $path, $suffix = null ) {
    $modified_path = awpcp_add_path_prefix( $path );
    $basename = basename( $modified_path );
    return awpcp_remove_path_prefix( $basename, PATHINFO_BASENAME );
}

/**
 * TODO: provide a function that takes a path and one that doesn't. Remove
 *      file_exists; the former should only be called with valid paths.
 *
 * @param string    $path           Path to the file whose unique filename needs to be generated.
 * @param string    $filename       Target filename. The unique filename will be as similar as
 *                                  possible to this name.
 * @param array     $directories    The generated name must be unique in all directories in this array.
 * @since 3.4
 */
function awpcp_unique_filename( $path, $filename, $directories ) {
    $pathinfo = awpcp_utf8_pathinfo( $filename );

    $name = awpcp_sanitize_file_name( $pathinfo['filename'] );
    $extension = $pathinfo['extension'];
    $file_size = file_exists( $path ) ? filesize( $path ) : 0;
    $timestamp = microtime();
    $salt = wp_salt();
    $counter = 0;

    do {
        $hash = hash( 'crc32b', "$name-$extension-$file_size-$timestamp-$salt-$counter" );
        $new_filename = "$name-$hash.$extension";
        $counter = $counter + 1;
    } while ( awpcp_is_filename_already_used( $new_filename, $directories ) );

    return $new_filename;
}

/**
 * Remove characters not removed by sanitize_file_name, that are not invalid in OS,
 * but cause problems with URLs.
 *
 * See: https://github.com/drodenbaugh/awpcp/issues/1222#issuecomment-119742743
 *
 * @since next-release
 */
function awpcp_sanitize_file_name( $filename ) {
    $sanitize_file_name = sanitize_file_name( $filename );
    $sanitize_file_name = str_replace( '^', '', $sanitize_file_name );
    return $sanitize_file_name;
}

/**
 * @since 3.4
 */
function awpcp_is_filename_already_used( $filename, $directories ) {
    foreach ( $directories as $directory ) {
        if ( file_exists( "$directory/$filename" ) ) {
            return true;
        }
    }

    return false;
}

/**
 * @since 3.3
 */
function awpcp_register_activation_hook( $__FILE__, $callback ) {
    $file = WP_CONTENT_DIR . '/plugins/' . basename( dirname( $__FILE__ ) ) . '/' . basename( $__FILE__ );
    register_activation_hook( $file, $callback );
}

function awpcp_register_deactivation_hook( $__FILE__, $callback ) {
    $file = WP_CONTENT_DIR . '/plugins/' . basename( dirname( $__FILE__ ) ) . '/' . basename( $__FILE__ );
    register_deactivation_hook( $file, $callback );
}

/**
 * @since next-release
 */
function awpcp_unregister_widget_if_exists( $widget_class ) {
    global $wp_widget_factory;

    if ( ! is_object( $wp_widget_factory ) ) {
        return;
    }

    if ( isset( $wp_widget_factory->widgets[ 'AWPCP_LatestAdsWidget' ] ) ) {
        unregister_widget("AWPCP_LatestAdsWidget");
    }
}

/**
 * @since 3.4
 */
function awpcp_are_images_allowed() {
    $allowed_image_extensions = array_filter( awpcp_get_option( 'allowed-image-extensions', array() ) );
    return count( $allowed_image_extensions ) > 0;
}


function add_slashes_recursive( $variable ) {
    if (is_string($variable)) {
        return addslashes($variable);
    } elseif (is_array($variable)) {
        foreach($variable as $i => $value) {
            $variable[$i] = add_slashes_recursive($value);
        }
    }

    return $variable ;
}

function string_contains_string_at_position($haystack, $needle, $pos = 0, $case=true) {
    if ($case) {
        $result = (strpos($haystack, $needle, 0) === $pos);
    } else {
        $result = (stripos($haystack, $needle, 0) === $pos);
    }
    return $result;
}

function string_starts_with($haystack, $needle, $case=true) {
    return string_contains_string_at_position($haystack, $needle, 0, $case);
}

function string_ends_with($haystack, $needle, $case=true) {
    return string_contains_string_at_position($haystack, $needle, (strlen($haystack) - strlen($needle)), $case);
}

/**
 * @since new-release
 */
function awpcp_get_option( $option, $default = '', $reload = false ) {
    return get_awpcp_option( $option, $default, $reload );
}

function get_awpcp_option($option, $default='', $reload=false) {
    return awpcp()->settings->get_option( $option, $default, $reload );
}

//Function to replace addslashes_mq, which is causing major grief.  Stripping of undesireable characters now done
// through above stripslashes_deep_gpc.
function clean_field($foo) {
    return add_slashes_recursive($foo);
}
// END FUNCTION: replace underscores with dashes for search engine friendly urls


function isValidURL($url) {
    return preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $url);
}

/**
 * @since 3.0.2
 */
function awpcp_is_valid_email_address($email) {
    return filter_var( $email, FILTER_VALIDATE_EMAIL ) !== false;
}

/**
 * @since 3.4
 */
function awpcp_is_email_address_allowed( $email_address ) {
    $wildcard = 'BCCsyfxU6HMXyyasic6t';
    $pattern = '[a-zA-Z0-9-]*';

    $domains_whitelist = str_replace( '*', $wildcard, get_awpcp_option( 'ad-poster-email-address-whitelist' ) );
    $domains_whitelist = preg_quote( $domains_whitelist );
    $domains_whitelist = str_replace( $wildcard, $pattern, $domains_whitelist );
    $domains_whitelist = str_replace( "{$pattern}\.", "(?:{$pattern}\.)?", $domains_whitelist );
    $domains_whitelist = array_filter( explode( "\n", $domains_whitelist ) );
    $domains_whitelist = array_map( 'trim', $domains_whitelist );

    $domains_pattern = '/' . implode( '|', $domains_whitelist ) . '/';

    if ( empty( $domains_whitelist ) ) {
        return true;
    }

    $domain = substr( $email_address, strpos( $email_address, '@' ) + 1 );

    if ( preg_match( $domains_pattern, $domain ) ) {
        return true;
    }

    return false;
}

function defaultcatexists($defid) {
    global $wpdb;

    $query = 'SELECT COUNT(*) FROM ' . AWPCP_TABLE_CATEGORIES . ' WHERE category_id = %d';
    $query = $wpdb->prepare( $query, $defid );

    $count = $wpdb->get_var( $query );

    if ( $count !== false && $count > 0 ) {
        return true;
    } else {
        return false;
    }

}

// START FUNCTION: function to create a default category with an ID of  1 in the event a default category with ID 1 does not exist
function createdefaultcategory($idtomake,$titletocallit) {
    global $wpdb;

    $wpdb->insert( AWPCP_TABLE_CATEGORIES, array( 'category_name' => $titletocallit, 'category_parent_id' => 0 ) );

    $query = 'UPDATE ' . AWPCP_TABLE_CATEGORIES . ' SET category_id = 1 WHERE category_id = %d';
    $query = $wpdb->prepare( $query, $wpdb->insert_id );

    $wpdb->query( $query );
}
// END FUNCTION: create default category


//////////////////////
// START FUNCTION: function to delete multiple ads at once used when admin deletes a category that contains ads but does not move the ads to a new category
//////////////////////
function massdeleteadsfromcategory($catid) {
    $ads = AWPCP_Ad::find_by_category_id($catid);
    foreach ($ads as $ad) {
        $ad->delete();
    }
}
// END FUNCTION

function create_ad_postedby_list($name) {
    global $wpdb;

    $output = '';
    $query = 'SELECT DISTINCT ad_contact_name FROM ' . AWPCP_TABLE_ADS . ' WHERE disabled = 0 ORDER BY ad_contact_name ASC';

    $results = $wpdb->get_col( $query );

    foreach ( $results as $contact_name ) {
        if ( strcmp( $contact_name, $name ) === 0 ) {
            $output .= "<option value=\"$contact_name\" selected=\"selected\">$contact_name</option>";
        } else {
            $output .= "<option value=\"$contact_name\">$contact_name</option>";
        }
    }

    return $output;
}

function awpcp_strip_html_tags( $text )
{
    // Remove invisible content
    $text = preg_replace(
    array(
            '@<head[^>]*?>.*?</head>@siu',
            '@<style[^>]*?>.*?</style>@siu',
            '@<script[^>]*?.*?</script>@siu',
            '@<object[^>]*?.*?</object>@siu',
            '@<embed[^>]*?.*?</embed>@siu',
            '@<applet[^>]*?.*?</applet>@siu',
            '@<noframes[^>]*?.*?</noframes>@siu',
            '@<noscript[^>]*?.*?</noscript>@siu',
            '@<noembed[^>]*?.*?</noembed>@siu',
    // Add line breaks before and after blocks
            '@</?((address)|(blockquote)|(center)|(del))@iu',
            '@</?((div)|(h[1-9])|(ins)|(isindex)|(p)|(pre))@iu',
            '@</?((dir)|(dl)|(dt)|(dd)|(li)|(menu)|(ol)|(ul))@iu',
            '@</?((table)|(th)|(td)|(caption))@iu',
            '@</?((form)|(button)|(fieldset)|(legend)|(input))@iu',
            '@</?((label)|(select)|(optgroup)|(option)|(textarea))@iu',
            '@</?((frameset)|(frame)|(iframe))@iu',
    ),
    array(
            ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
            "\n\$0", "\n\$0", "\n\$0", "\n\$0", "\n\$0", "\n\$0",
            "\n\$0", "\n\$0",
    ),
    $text );
    return strip_tags( $text );
}
// END FUNCTION

// Override the SMTP settings built into WP if the admin has enabled that feature
function awpcp_phpmailer_init_smtp( $phpmailer ) {
    // smtp not enabled?
    $enabled = get_awpcp_option('usesmtp');
    if ( !$enabled || 0 == $enabled ) return;
    $hostname = get_awpcp_option('smtphost');
    $port = get_awpcp_option('smtpport');
    $username = get_awpcp_option('smtpusername');
    $password = get_awpcp_option('smtppassword');
    // host and port not set? gotta have both.
    if ( '' == trim( $hostname ) || '' == trim( $port ) )
        return;
    // still got defaults set? can't use those.
    if ( 'mail.example.com' == trim( $hostname ) ) return;
    if ( 'smtp_username' == trim( $username ) ) return;
    $phpmailer->Mailer = 'smtp';
    $phpmailer->Host = $hostname;
    $phpmailer->Port = $port;
    // If there's a username and password then assume SMTP Auth is necessary and set the vars:
    if ( '' != trim( $username )  && '' != trim( $password ) ) {
        $phpmailer->SMTPAuth = true;
        $phpmailer->Username = $username;
        $phpmailer->Password = $password;
    }
    // that's it!
}

/**
 * @deprecated 3.7.5    Use AWPCP_Email class instead.
 */
function awpcp_process_mail($senderemail='', $receiveremail='',  $subject='',
                            $body='', $sendername='', $replytoemail='', $html=false)
{
    $headers =  "MIME-Version: 1.0\n" .
    "From: $sendername <$senderemail>\n" .
    "Reply-To: $replytoemail\n";

    if ($html) {
        $headers .= "Content-Type: text/html; charset=\"" . get_option('blog_charset') . "\"\n";
    } else {
        $headers .= "Content-Type: text/plain; charset=\"" . get_option('blog_charset') . "\"\n";
    }

    $subject = $subject;
    $message = "$body\n\n" . awpcp_format_email_sent_datetime() . "\n\n";

    if (wp_mail($receiveremail, $subject, $message, $headers )) {
        return 1;

    } elseif (awpcp_send_email($senderemail, $receiveremail, $subject, $body,true)) {
        return 1;

    } elseif (@mail($receiveremail, $subject, $body, $headers)) {
        return 1;

    } else {
        return 0;
    }
}

function awpcp_format_email_sent_datetime() {
    $time = date_i18n( awpcp_get_datetime_format(), current_time( 'timestamp' ) );
    return sprintf( __( 'Email sent %s.', 'another-wordpress-classifieds-plugin' ), $time );
}

// make sure the IP isn't a reserved IP address
function awpcp_validip($ip) {

    if (!empty($ip) && ip2long($ip)!=-1) {

        $reserved_ips = array (
        array('0.0.0.0','2.255.255.255'),
        array('10.0.0.0','10.255.255.255'),
        array('127.0.0.0','127.255.255.255'),
        array('169.254.0.0','169.254.255.255'),
        array('172.16.0.0','172.31.255.255'),
        array('192.0.2.0','192.0.2.255'),
        array('192.168.0.0','192.168.255.255'),
        array('255.255.255.0','255.255.255.255')
        );

        foreach ($reserved_ips as $r) {
            $min = ip2long($r[0]);
            $max = ip2long($r[1]);
            if ((ip2long($ip) >= $min) && (ip2long($ip) <= $max))
            return false;
        }

        return true;

    } else {

        return false;

    }
}

// retrieve the ad poster's IP if possible
function awpcp_getip() {
    if ( awpcp_validip(awpcp_array_data("HTTP_CLIENT_IP", '', $_SERVER)) ) {
        return $_SERVER["HTTP_CLIENT_IP"];
    }

    foreach ( explode(",", awpcp_array_data("HTTP_X_FORWARDED_FOR", '', $_SERVER)) as $ip ) {
        if ( awpcp_validip(trim($ip) ) ) {
            return $ip;
        }
    }

    if (awpcp_validip(awpcp_array_data("HTTP_X_FORWARDED", '', $_SERVER))) {
        return $_SERVER["HTTP_X_FORWARDED"];

    } elseif (awpcp_validip(awpcp_array_data('HTTP_FORWARDED_FOR', '', $_SERVER))) {
        return $_SERVER["HTTP_FORWARDED_FOR"];

    } elseif (awpcp_validip(awpcp_array_data("HTTP_FORWARDED", '', $_SERVER))) {
        return $_SERVER["HTTP_FORWARDED"];

    } else {
        return awpcp_array_data("REMOTE_ADDR", '', $_SERVER);
    }
}

function awpcp_get_ad_share_info($id) {
    global $wpdb;

    $ad = AWPCP_Ad::find_by_id($id);
    $info = array();

    if (is_null($ad)) {
        return null;
    }

    $info['url'] = url_showad($id);
    $info['title'] = stripslashes($ad->ad_title);
    $info['description'] = strip_tags(stripslashes($ad->ad_details));

    $info['description'] = str_replace( array( "\r", "\n", "\t" ), ' ', $info['description'] );
    $info['description'] = preg_replace( '/ {2,}/', ' ', $info['description'] );
    $info['description'] = trim( $info['description'] );

    if ( awpcp_utf8_strlen( $info['description'] ) > 300 ) {
        $info['description'] = awpcp_utf8_substr( $info['description'], 0, 300 ) . '...';
    }

    $info['images'] = array();

    $info['published-time'] = awpcp_datetime( 'Y-m-d', $ad->ad_postdate );
    $info['modified-time'] = awpcp_datetime( 'Y-m-d', $ad->ad_last_updated );

    $images = awpcp_media_api()->find_by_ad_id( $ad->ad_id, array(
        'enabled' => true,
        'status' => AWPCP_Media::STATUS_APPROVED,
    ) );

    foreach ( $images as $image ) {
        $info[ 'images' ][] = $image->get_url( 'large' );
    }

    return $info;
}

/**
 * TODO: move to AWPCP_Email?
 */
function awpcp_send_email($from,$to,$subject,$message, $html=false, $attachments=array(), $bcc='') {
    $separator='Next.Part.331925654896717'.time();
    $att_separator='NextPart.is_a_file9817298743'.time();
    $headers="From: $from\n";
    $headers.="MIME-Version: 1.0\n";
    if (!empty($bcc)) {
        $headers.="Bcc: $bcc\n";
    }
    $text_header="Content-Type: text/plain; charset=\"iso-8859-1\"\nContent-Transfer-Encoding: 8bit\n\n";
    $html_header="Content-Type: text/html; charset=\"iso-8859-1\"\nContent-Transfer-Encoding: 8bit\n\n";
    $html_message=$message;
    $text_message=$message;
    $text_message=str_replace('&nbsp;',' ',$text_message);
    $text_message=trim(strip_tags(stripslashes($text_message)));
    // Bring down number of empty lines to 2 max
    $text_message=preg_replace("/\n[\s]+\n/","\n",$text_message);
    $text_message=preg_replace("/[\n]{3,}/", "\n\n",$text_message);
    $text_message=wordwrap($text_message,72);
    $message="\n\n--$separator\n".$text_header.$text_message;

    if ($html) {
        $message.="\n\n--$separator\n".$html_header.$html_message;
    }

    $message.="\n\n--$separator--\n";

    if (!empty($attachments)) {
        $headers.="Content-Type: multipart/mixed; boundary=\"$att_separator\";\n";
        $message="\n\n--$att_separator\nContent-Type: multipart/alternative; boundary=\"$separator\";\n".$message;
        while (list(,$file)=each($attachments)) {
            $message.="\n\n--$att_separator\n";
            $message.="Content-Type: application/octet-stream; name=\"".basename($file)."\"\n";
            $message.="Content-Transfer-Encoding: base64\n";
            $message.='Content-Disposition: attachment; filename="'.basename($file)."\"\n\n";
            $message.=wordwrap(base64_encode(fread(fopen($file,'rb'),filesize($file))),72,"\n",1);
        }
        $message.="\n\n--$att_separator--\n";
    } else {
        $headers.="Content-Type: multipart/alternative;\n\tboundary=\"$separator\";\n";
    }
    $message='This is a multi-part message in MIME format.'.$message;
    if (isset($_SERVER['WINDIR']) || isset($_SERVER['windir']) || isset($_ENV['WINDIR']) || isset($_ENV['windir'])) {
        $message=unix2dos($message);
    }
    //  $headers=unix2dos($headers);
    $sentok=@mail($to,$subject,$message,$headers,"-f$from");
    return $sentok;
}

/**
 * @since 3.6.6
 */
function awpcp_user_agent_header() {
    $user_agent = "WordPress %s / Another WordPress Classifieds Plugin %s";
    $user_agent = sprintf( $user_agent, get_bloginfo( 'version' ), $GLOBALS['awpcp_db_version'] );
    return $user_agent;
}

/**
 * @since 3.7.6
 */
function awpcp_get_curl_info() {
    if ( ! in_array( 'curl', get_loaded_extensions() ) ) {
        return __( 'Not Installed', 'another-wordpress-classifieds-plugin' );
    }

    if ( ! function_exists( 'curl_version' ) ) {
        return __( 'Installed', 'another-wordpress-classifieds-plugin' );
    }

    $curl_info = curl_version();

    $output[] = "Version: {$curl_info['version']}";

    if ( $curl_info['features'] & CURL_VERSION_SSL) {
        $output[] = __( 'SSL Support: Yes.', 'another-wordpress-classifieds-plugin' );
    } else {
        $output[] = __( 'SSL Support: No.', 'another-wordpress-classifieds-plugin' );
    }

    $output[] = __( 'OpenSSL version:' ) . ' ' . $curl_info['ssl_version'];

    return implode( '<br>', $output );
}

/**
 * @since 3.7.8
 */
function awpcp_get_server_ip_address() {
    $ip_address = get_transient( 'awpcp-server-ip-address' );

    if ( $ip_address ) {
        return $ip_address;
    }

    $ip_address = awpcp_get_server_ip_address_from_httpbin();

    if ( is_null( $ip_address ) ) {
        $ip_address = '(unknown)';
    }

    set_transient( 'awpcp-server-ip-address', $ip_address, HOUR_IN_SECONDS );

    return $ip_address;
}

/**
 * @since 3.8.4
 */
function awpcp_get_server_ip_address_from_httpbin() {
    $response = wp_remote_get( 'https://httpbin.org/ip' );

    if ( is_wp_error( $response ) ) {
        return null;
    }

    $body = json_decode( wp_remote_retrieve_body( $response ) );

    if ( ! isset( $body->origin ) ) {
        return null;
    }

    return $body->origin;
}