<?php

/**
 * Trigger custom error.
 */
function usTriggerError($message, $errno)
{
    // check wp error
    if (isset($_GET['action']) && 'error_scrape' == $_GET['action']) {
        echo '<span>'.$message.'</span>';
        exit;
    } else {
        trigger_error($message, $errno);
    }
}

/**
 * Send JSON response.
 *
 * @param $data
 */
function a4bJsonResponse($data)
{
    @header('Content-type: application/json; charset=utf-8');
//    echo wp_json_encode($data, JSON_NUMERIC_CHECK);
    echo json_encode($data, JSON_NUMERIC_CHECK);
    wp_die();
}

/**
 * Get products by categories ids.
 *
 * @param        $categoriesIds
 * @param null   $postsIds
 * @param null   $notPostsIds
 * @param string $postType
 * @param string $postTaxonomy
 *
 * @return array
 */
function a4bGetPostsByCategories($categoriesIds = array(), $args = array())
{
    $defaultArgs = array(
        'post_type' => 'product',
        'post_status' => 'publish',
        'posts_per_page' => -1,
        'tax_query' => array(
            array(
                'taxonomy' => 'product_cat',
                'terms' => $categoriesIds,
                'field' => 'term_id',
                'operator' => 'IN',
            ),
        ),
    );

    $args = array_merge($defaultArgs, $args);
    $query = new \WP_Query($args);

    return $query->posts;
}

/**
 * Get products by ids.
 *
 * @param string $postType
 * @param null   $postsIds
 * @param null   $notPostsIds
 * @param null   $parentsIds
 *
 * @return array
 */
function a4bGetPosts($args)
{
    $defaultArgs = array(
        'post_type' => 'product',
        'post_status' => 'publish',
        'posts_per_page' => -1,
    );

    $args = array_merge($defaultArgs, $args);
    $query = new \WP_Query($args);

    return $query->posts;
}

/**
 * Exclude posts from array with given IDs.
 *
 * @param $posts
 * @param $excludeIds
 *
 * @return array
 */
function a4bExcludePostsByIds($posts, $excludeIds)
{
    return array_filter(
        $posts,
        function ($post) use ($excludeIds) {
            return !in_array($post->ID, $excludeIds);
        }
    );
}

/**
 * Gather values of given field from each object into array.
 *
 * @param $objects
 * @param $field
 *
 * @return array
 */
function a4bObjectsFieldToArray($objects, $field)
{
    $fieldValues = [];
    // Get value of given field from each object.
    foreach ($objects as $object) {
        $fieldValues[] = $object->$field;
    }

    return $fieldValues;
}

/**
 * Add messages to cookies.
 *
 * @param $message
 * @param $type
 */
function a4bFlashMessage($message, $type)
{
    $flash = isset($_COOKIE['a4b_flash_messages']) ? json_decode(base64_decode($_COOKIE['a4b_flash_messages']), true) : array();
    $flash[] = compact('message', 'type');
    $encodedFlashData = base64_encode(json_encode($flash));

    $_COOKIE['a4b_flash_messages'] = $encodedFlashData;
    setcookie('a4b_flash_messages', $encodedFlashData, time() + 10, '/');
}

/**
 * Show errors in a4b_flash_messages cookie and clear it from cookie after.
 */
function a4bShowNotices()
{
    // Read messages from session
    $flashMessages = isset($_COOKIE['a4b_flash_messages']) ? json_decode(base64_decode($_COOKIE['a4b_flash_messages']), true) : array();

    // Output notices
    foreach ($flashMessages as $flash) {
        printf('<div class="notice notice-%s is-dismissible"><p>%s</p></div>', esc_attr($flash['type']), esc_html($flash['message']));
    }

    // Delete cookie
    unset($_COOKIE['a4b_flash_messages']);
    setcookie('a4b_flash_messages', '', time() - 3600, '/');
}

/**
 * Setup errors to flash and redirect back.
 *
 * @param $errors
 */
function a4bRedirectBackWithErrorNotices($errors)
{
    // Save error notices to show on page
    foreach ($errors as $error) {
        a4bFlashMessage($error, 'error');
    }

    wp_redirect(wp_get_referer());
    exit();
}