<?php
namespace MailChannels;

/*
 * requireFolderTree recursively calls require_once on all php files in on all files under $folder
 *
 * @param string the folder to scan and require php files from
 */
function requireFolderTree ($folder) {
    $files = scandir($folder);
    foreach ($files as $file) {
        if ($file == "." || $file == "..") {
            continue;
        } else if (is_dir($folder . "/$file")) {
            requireFolderTree($folder."/$file");
            continue;
        }

        if (preg_match('/\.php$/', $file)) {
            require_once($folder . "/$file");
        }
    }
}

function intTypeCheck($values) {
    foreach ($values as $key=>$value) {
        if (!ctype_digit((string) $value)) {
            throw new \InvalidArgumentException("$key must be an integer");
        }
    }
}

function classExtends($class, $extends) {
    $extensions = class_parents($class);

    if (!in_array($extends, $extensions)) {
        throw new ClassDoesNotExtendException($class, $extends);
    }
}