<?php

class Helper {
    /**
     * Generate SQL Filter condition (space separated) for a given column.
     *
     * @param string|null $filterValue The filter value to match against.
     * @param string $columnName The name of the column in the database table.
     * @return string The SQL condition generated based on the filter value and column name.
     * @noinspection PhpMissingParamTypeInspection
     */
    public static function generateFilterCondition($filterValue, string $columnName): string {
        $sql = "";

        if (is_array($filterValue)) {
            if (isset($filterValue['from']) && isset($filterValue['to'])) {
                $sql = " AND `$columnName` >= " . $filterValue['from'] . " AND `$columnName` <= " . $filterValue['to'];
            }
        } else if ($filterValue === "0" || $filterValue === "1") {
            $sql .= " AND `$columnName` = " . $filterValue;
        } else if (!empty($filterValue)) {
            $filterItems = explode(" ", $filterValue);
            foreach ($filterItems as $item) {
                $sql .= " AND `$columnName` LIKE '%" . $item . "%'";
            }
        }

        return $sql;
    }
}