<?php

if (!defined('_PS_VERSION_')) {
    exit;
}

function upgrade_module_1_6_0($module)
{
    $columnsToAdd = [
        'description'       => 'TEXT',
        'extra_description' => 'TEXT',
        'link'              => 'VARCHAR(512) NOT NULL DEFAULT \'\'',
        'template'          => 'VARCHAR(32) NOT NULL DEFAULT \'image_left\'',
        'image'             => 'VARCHAR(255) NOT NULL DEFAULT \'\'',
    ];

    foreach ($columnsToAdd as $column => $definition) {
        $existing = Db::getInstance()->executeS(
            'SHOW COLUMNS FROM `' . _DB_PREFIX_ . 'ws_customhtml` LIKE \'' . $column . '\''
        );

        if (!empty($existing)) {
            continue;
        }

        if (!Db::getInstance()->execute(
            'ALTER TABLE `' . _DB_PREFIX_ . 'ws_customhtml` ADD COLUMN `' . $column . '` ' . $definition
        )) {
            return false;
        }
    }

    return true;
}