evus.acvisa.com/app/service/SeoMetaService.php

<?php
declare(strict_types=1);

namespace app\service;

final class SeoMetaService
{
    private array $config;

    public function __construct(?array $config = null)
    {
        $this->config = $config ?? (array) config('seo');
    }

    public function forRoute(
        string $app,
        string $controller,
        string $action,
        array $query = [],
        array $overrides = []
    ): array {
        $app = strtolower(trim($app));
        $controller = strtolower(trim($controller));
        $action = strtolower(trim($action));
        $routeKey = implode('/', [$app, $controller, $action]);
        $page = (array) (($this->config['pages'] ?? [])[$routeKey] ?? []);
        $data = array_merge($page, $overrides);

        $title = trim((string) ($data['title'] ?? $this->config['default_title'] ?? ''));
        $siteName = trim((string) ($this->config['site_name'] ?? ''));
        if ($siteName !== '' && $title !== '' && stripos($title, $siteName) === false) {
            $title .= ' - ' . $siteName;
        }

        $robots = (string) ($data['robots'] ?? $this->config['default_robots'] ?? 'noindex,follow');

        $noindexControllers = array_map(
            'strtolower',
            (array) ($this->config['noindex_controllers'] ?? [])
        );
        if (in_array($controller, $noindexControllers, true)) {
            $robots = 'noindex,follow';
        }

        foreach ((array) ($this->config['sensitive_query_keys'] ?? []) as $key) {
            if (isset($query[$key]) && $query[$key] !== '') {
                $robots = 'noindex,nofollow';
                break;
            }
        }

        $canonical = trim((string) ($data['canonical'] ?? ''));
        if ($canonical === '') {
            $canonical = $this->canonical(
                (string) ($data['canonical_path'] ?? ''),
                $query,
                (array) ($data['canonical_query_keys'] ?? [])
            );
        }

        return [
            'title' => $title,
            'description' => trim((string) (
                $data['description']
                ?? $this->config['default_description']
                ?? ''
            )),
            'keywords' => trim((string) (
                $data['keywords']
                ?? $this->config['default_keywords']
                ?? ''
            )),
            'robots' => $robots,
            'canonical' => $canonical,
            'lang' => (string) ($data['lang'] ?? $this->config['lang'] ?? 'zh-CN'),
            'applicable_device' => (string) (
                $data['applicable_device']
                ?? $this->config['applicable_device']
                ?? 'pc,mobile'
            ),
            'baidu_site_verification' => trim((string) (
                $this->config['baidu_site_verification']
                ?? ''
            )),
        ];
    }

    public function canonical(
        string $path,
        array $query = [],
        array $allowedQueryKeys = []
    ): string {
        $baseUrl = $this->normalizedBaseUrl();
        if ($baseUrl === '' || $path === '') {
            return '';
        }

        if (str_starts_with($path, '//') || parse_url($path, PHP_URL_HOST) !== null) {
            return '';
        }

        $path = '/' . ltrim($path, '/');
        $canonicalQuery = [];
        foreach ($allowedQueryKeys as $key) {
            if (!array_key_exists($key, $query) || is_array($query[$key])) {
                continue;
            }
            if ($query[$key] === '' || $query[$key] === null) {
                continue;
            }

            $value = (string) $query[$key];
            if (in_array($key, ['id', 'page'], true)) {
                if (preg_match('/^[1-9]\d*$/', $value) !== 1) {
                    continue;
                }
                if ($key === 'page' && $value === '1') {
                    continue;
                }
            }

            $canonicalQuery[$key] = $value;
        }

        $url = $baseUrl . ($path === '/' ? '/' : rtrim($path, '/'));
        if ($canonicalQuery !== []) {
            $url .= '?' . http_build_query($canonicalQuery, '', '&', PHP_QUERY_RFC3986);
        }

        return $url;
    }

    public function descriptionFromHtml(string $html, int $maxLength = 100): string
    {
        $html = (string) preg_replace(
            '#<(script|style)\b[^>]*>.*?</\1>#isu',
            ' ',
            $html
        );
        $text = (string) preg_replace('/<[^>]+>/u', ' ', $html);
        $text = html_entity_decode($text, ENT_QUOTES | ENT_HTML5, 'UTF-8');
        $text = trim((string) preg_replace('/\s+/u', ' ', $text));
        if ($maxLength < 1) {
            return '';
        }

        if (function_exists('mb_substr')) {
            return mb_substr($text, 0, $maxLength, 'UTF-8');
        }

        return substr($text, 0, $maxLength);
    }

    public function baseUrl(): string
    {
        return $this->normalizedBaseUrl();
    }

    private function normalizedBaseUrl(): string
    {
        $baseUrl = rtrim(trim((string) ($this->config['base_url'] ?? '')), '/');
        if ($baseUrl === '' || filter_var($baseUrl, FILTER_VALIDATE_URL) === false) {
            return '';
        }

        $scheme = strtolower((string) parse_url($baseUrl, PHP_URL_SCHEME));
        if (!in_array($scheme, ['http', 'https'], true)) {
            return '';
        }

        return $baseUrl;
    }
}