openvk/Web/Models/Entities/Traits/TRichText.php

<?php

declare(strict_types=1);

namespace openvk\Web\Models\Entities\Traits;

use openvk\Web\Models\Repositories\{Users, Clubs};
use Wkhooy\ObsceneCensorRus;

trait TRichText
{
    private function formatEmojis(string $text): string
    {
        $contentColumn = property_exists($this, "overrideContentColumn") ? $this->overrideContentColumn : "content";
        if (iconv_strlen($this->getRecord()->{$contentColumn}) > OPENVK_ROOT_CONF["openvk"]["preferences"]["wall"]["postSizes"]["emojiProcessingLimit"]) {
            return $text;
        }

        $emojis   = \Emoji\detect_emoji($text);
        $replaced = []; # OVK-113
        foreach ($emojis as $emoji) {
            $point = explode("-", strtolower($emoji["hex_str"]))[0];
            if (in_array($point, $replaced)) {
                continue;
            } else {
                $replaced[] = $point;
            }

            $image  = "https://abs.twimg.com/emoji/v2/72x72/$point.png";
            $image  = "<img src='$image' alt='$emoji[emoji]' ";
            $image .= "style='max-height:12px; padding-left: 2pt; padding-right: 2pt; vertical-align: bottom;' />";

            $text = str_replace($emoji["emoji"], $image, $text);
        }

        return $text;
    }

    private function formatLinks(string &$text): string
    {
        return preg_replace_callback(
            "%(([A-z]++):\/\/(\S*?\.\S*?))([\s)\[\]{},\"\'<]|\.\s|$)%",
            (function (array $matches): string {
                $href = str_replace("#", "&num;", $matches[1]);
                $href = rawurlencode(str_replace(";", "&#59;", $href));
                $link = str_replace("#", "&num;", $matches[3]);
                # this string breaks ampersands
                $link = str_replace(";", "&#59;", $link);
                $rel  = $this->isAd() ? "sponsored" : "ugc";

                /*$server_domain = str_replace(':' . $_SERVER['SERVER_PORT'], '', $_SERVER['HTTP_HOST']);
                if(str_contains($link, $server_domain)) {
                    $replaced_link = str_replace(':' . $_SERVER['SERVER_PORT'], '', $link);
                    $replaced_link = str_replace($server_domain, '', $replaced_link);

                    return "<a href='$replaced_link' rel='$rel'>$link</a>" . htmlentities($matches[4]);
                }

                $link = htmlentities(urldecode($link));*/

                return "<a href='/away.php?to=$href' rel='$rel' target='_blank'>$link</a>" . htmlentities($matches[4]);
            }),
            $text
        );
    }

    private function removeZalgo(string $text): string
    {
        return preg_replace("%\p{M}{3,}%Xu", "", $text);
    }

    public function resolveMentions(array $skipUsers = []): \Traversable
    {
        $contentColumn = property_exists($this, "overrideContentColumn") ? $this->overrideContentColumn : "content";
        $text = $this->getRecord()->{$contentColumn};
        $text = preg_replace("%@([A-Za-z0-9]++) \(((?:[\p{L&}\p{Lo} 0-9]\p{Mn}?)++)\)%Xu", "[$1|$2]", $text);
        $text = preg_replace("%([\n\r\s]|^)(@([A-Za-z0-9]++))%Xu", "$1[$3|@$3]", $text);

        $resolvedUsers = $skipUsers;
        $resolvedClubs = [];
        preg_match_all("%\[([A-Za-z0-9]++)\|((?:[\p{L&}\p{Lo} 0-9@]\p{Mn}?)++)\]%Xu", $text, $links, PREG_PATTERN_ORDER);
        foreach ($links[1] as $link) {
            if (preg_match("%^id([0-9]++)$%", $link, $match)) {
                $uid = (int) $match[1];
                if (in_array($uid, $resolvedUsers)) {
                    continue;
                }

                $resolvedUsers[] = $uid;
                $maybeUser = (new Users())->get($uid);
                if ($maybeUser) {
                    yield $maybeUser;
                }
            } elseif (preg_match("%^(?:club|public|event)([0-9]++)$%", $link, $match)) {
                $cid = (int) $match[1];
                if (in_array($cid, $resolvedClubs)) {
                    continue;
                }

                $resolvedClubs[] = $cid;
                $maybeClub = (new Clubs())->get($cid);
                if ($maybeClub) {
                    yield $maybeClub;
                }
            } else {
                $maybeUser = (new Users())->getByShortURL($link);
                if ($maybeUser) {
                    $uid = $maybeUser->getId();
                    if (in_array($uid, $resolvedUsers)) {
                        continue;
                    } else {
                        $resolvedUsers[] = $uid;
                    }

                    yield $maybeUser;
                    continue;
                }

                $maybeClub = (new Clubs())->getByShortURL($link);
                if ($maybeClub) {
                    $cid = $maybeClub->getId();
                    if (in_array($cid, $resolvedClubs)) {
                        continue;
                    } else {
                        $resolvedClubs[] = $cid;
                    }

                    yield $maybeClub;
                }
            }
        }
    }

    public function getText(bool $html = true): string
    {
        $contentColumn = property_exists($this, "overrideContentColumn") ? $this->overrideContentColumn : "content";

        $text = htmlspecialchars($this->getRecord()->{$contentColumn}, ENT_DISALLOWED | ENT_XHTML);
        $proc = iconv_strlen($this->getRecord()->{$contentColumn}) <= OPENVK_ROOT_CONF["openvk"]["preferences"]["wall"]["postSizes"]["processingLimit"];
        if ($html) {
            if ($proc) {
                $text = $this->formatLinks($text);
                $text = preg_replace("%@([A-Za-z0-9]++) \(((?:[\p{L&}\p{Lo} 0-9]\p{Mn}?)++)\)%Xu", "[$1|$2]", $text);
                $text = preg_replace("%([\n\r\s]|^)(@([A-Za-z0-9]++))%Xu", "$1[$3|@$3]", $text);
                $text = preg_replace("%\[([A-Za-z0-9]++)\|((?:[\p{L&}\p{Lo} 0-9@]\p{Mn}?)++)\]%Xu", "<a href='/$1'>$2</a>", $text);
                $text = preg_replace_callback("%([\n\r\s]|^)(\#([\p{L}_0-9][\p{L}_0-9\(\)\-\']+[\p{L}_0-9\(\)]|[\p{L}_0-9]{1,2}))%Xu", function ($m) {
                    $slug = rawurlencode($m[3]);

                    return "$m[1]<a href='/search?section=posts&q=%23$slug'>$m[2]</a>";
                }, $text);

                $text = $this->formatEmojis($text);
            }

            $text = $this->removeZalgo($text);
            $text = nl2br($text);
        } else {
            $text = str_replace("\r\n", "\n", $text);
        }

        if (OPENVK_ROOT_CONF["openvk"]["preferences"]["wall"]["christian"]) {
            ObsceneCensorRus::filterText($text);
        }

        return $text;
    }
}