<?php

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    require_once('../conn.php');
    header("Content-Type: application/json");
    $department_id = isset($_POST['department_id']) ? $_POST['department_id'] : null;
    $u = new User();
    echo $u->getUser($department_id);
}


class User
{
    public function getUser($department_id)
    {
        global $conn;

        $sql_str = "
            SELECT
                * 
            FROM( 
                SELECT 
                    '' AS value,
                    '全部' AS text
                FROM account 

                UNION 

                SELECT 
                DISTINCT
                    accountid AS value,
                    name AS text
                FROM account 
                WHERE accounttype IN ('B','M','W','E') 
            ";
        $sql_str .= !empty($department_id) ? " AND department_id = :department_id" : '';
        $sql_str .= "
            )AS tmp
            ORDER BY tmp.value
        ";
        $stmt = $conn->prepare($sql_str);
        if (!empty($department_id)) {
            $stmt->bindParam(':department_id', $department_id);
        }
        $stmt->execute();
        $data = $stmt->fetchAll(PDO::FETCH_ASSOC);
        return json_encode($data, JSON_UNESCAPED_UNICODE);
    }
}