| 1 |
<?php |
| 2 |
/** |
| 3 |
* Schema Validator Class |
| 4 |
* |
| 5 |
* Handles Schema.org compliance validation and SEO optimization checks. |
| 6 |
* Extracted from Schema_Generator to follow Single Responsibility Principle. |
| 7 |
* Maintains exact same validation logic and return formats as original implementation. |
| 8 |
* |
| 9 |
* @package ThinkRank\SEO |
| 10 |
* @since 1.0.0 |
| 11 |
*/ |
| 12 |
|
| 13 |
declare(strict_types=1); |
| 14 |
|
| 15 |
namespace ThinkRank\SEO; |
| 16 |
|
| 17 |
// Prevent direct access |
| 18 |
if (!defined('ABSPATH')) { |
| 19 |
exit; |
| 20 |
} |
| 21 |
|
| 22 |
/** |
| 23 |
* Schema Validator Class |
| 24 |
* |
| 25 |
* Validates schema markup against Schema.org specifications and provides SEO suggestions. |
| 26 |
* Preserves all existing validation logic and return formats. |
| 27 |
* |
| 28 |
* @since 1.0.0 |
| 29 |
*/ |
| 30 |
class Schema_Validator { |
| 31 |
|
| 32 |
/** |
| 33 |
* Schema Factory instance for type specifications |
| 34 |
* |
| 35 |
* @since 1.0.0 |
| 36 |
* @var Schema_Factory |
| 37 |
*/ |
| 38 |
private Schema_Factory $schema_factory; |
| 39 |
|
| 40 |
/** |
| 41 |
* Constructor |
| 42 |
* |
| 43 |
* @since 1.0.0 |
| 44 |
*/ |
| 45 |
public function __construct() { |
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// Ensure Schema_Factory is loaded |
| 47 |
if (!class_exists('ThinkRank\\SEO\\Schema_Factory')) { |
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require_once THINKRANK_PLUGIN_DIR . 'includes/seo/class-schema-factory.php'; |
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} |
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$this->schema_factory = new Schema_Factory(); |
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} |
| 52 |
|
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/** |
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* Validate schema markup against Schema.org specifications |
| 55 |
* PRESERVED: Exact same method signature and return format from original Schema_Generator |
| 56 |
* |
| 57 |
* @since 1.0.0 |
| 58 |
* |
| 59 |
* @param array $schema Schema markup to validate |
| 60 |
* @return array Validation results with errors, warnings, and suggestions |
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*/ |
| 62 |
public function validate_schema(array $schema): array { |
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$validation = [ |
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'valid' => true, |
| 65 |
'errors' => [], |
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'warnings' => [], |
| 67 |
'suggestions' => [], |
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'score' => 100 |
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]; |
| 70 |
|
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// Check basic structure |
| 72 |
if (!isset($schema['@context']) || $schema['@context'] !== $this->schema_factory->get_schema_context()) { |
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$validation['errors'][] = 'Missing or invalid @context. Should be: ' . $this->schema_factory->get_schema_context(); |
| 74 |
$validation['valid'] = false; |
| 75 |
} |
| 76 |
|
| 77 |
if (!isset($schema['@type'])) { |
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$validation['errors'][] = 'Missing @type property'; |
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$validation['valid'] = false; |
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return $validation; |
| 81 |
} |
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|
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$schema_type = $schema['@type']; |
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$spec = $this->schema_factory->get_schema_specification($schema_type); |
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|
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if (empty($spec)) { |
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$validation['errors'][] = "Unsupported schema type: {$schema_type}"; |
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$validation['valid'] = false; |
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return $validation; |
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} |
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|
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// Check required properties |
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foreach ($spec['required'] as $required_prop) { |
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if (!isset($schema[$required_prop]) || empty($schema[$required_prop])) { |
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$validation['errors'][] = "Missing required property: {$required_prop}"; |
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$validation['valid'] = false; |
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} |
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} |
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|
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// Check recommended properties |
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$missing_recommended = 0; |
| 102 |
foreach ($spec['recommended'] as $recommended_prop) { |
| 103 |
if (!isset($schema[$recommended_prop]) || empty($schema[$recommended_prop])) { |
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$validation['warnings'][] = "Missing recommended property: {$recommended_prop}"; |
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$missing_recommended++; |
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} |
| 107 |
} |
| 108 |
|
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// Calculate score based on completeness |
| 110 |
$total_props = count($spec['required']) + count($spec['recommended']); |
| 111 |
$missing_props = count($validation['errors']) + $missing_recommended; |
| 112 |
$validation['score'] = $total_props > 0 ? (int) round(max(0, 100 - (($missing_props / $total_props) * 100))) : 100; |
| 113 |
|
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// Type-specific validation |
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$validation = $this->validate_schema_type_specific($schema, $schema_type, $validation); |
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|
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// SEO-specific suggestions |
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$validation = $this->add_seo_suggestions($schema, $schema_type, $validation); |
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|
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return $validation; |
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} |
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|
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/** |
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* Validate schema type-specific requirements |
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* PRESERVED: Exact same method logic from original Schema_Generator |
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* |
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* @since 1.0.0 |
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* |
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* @param array $schema Schema markup |
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* @param string $schema_type Schema type |
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* @param array $validation Current validation results |
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* @return array Updated validation results |
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*/ |
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private function validate_schema_type_specific(array $schema, string $schema_type, array $validation): array { |
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switch ($schema_type) { |
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case 'Article': |
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case 'BlogPosting': |
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case 'TechnicalArticle': |
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case 'NewsArticle': |
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case 'ScholarlyArticle': |
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case 'Report': |
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$validation = $this->validate_article_schema($schema, $validation); |
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break; |
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case 'Product': |
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$validation = $this->validate_product_schema($schema, $validation); |
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break; |
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case 'Organization': |
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$validation = $this->validate_organization_schema($schema, $validation); |
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break; |
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case 'LocalBusiness': |
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$validation = $this->validate_local_business_schema($schema, $validation); |
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break; |
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case 'WebSite': |
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$validation = $this->validate_website_schema($schema, $validation); |
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break; |
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case 'FAQPage': |
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$validation = $this->validate_faq_schema($schema, $validation); |
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break; |
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} |
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|
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return $validation; |
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} |
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|
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/** |
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* Validate Article schema specific requirements |
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* PRESERVED: Exact same method logic from original Schema_Generator |
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* |
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* @since 1.0.0 |
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* |
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* @param array $schema Schema markup |
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* @param array $validation Current validation results |
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* @return array Updated validation results |
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*/ |
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private function validate_article_schema(array $schema, array $validation): array { |
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// Check headline length (Google recommends under 110 characters) |
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if (isset($schema['headline']) && strlen($schema['headline']) > 110) { |
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$validation['warnings'][] = 'Headline is longer than 110 characters, may be truncated in search results'; |
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} |
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|
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// Check for image |
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if (!isset($schema['image'])) { |
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$validation['suggestions'][] = 'Add an image to improve rich snippet appearance'; |
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} |
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|
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// Check for author structure |
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if (isset($schema['author']) && is_array($schema['author'])) { |
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if (!isset($schema['author']['@type']) || $schema['author']['@type'] !== 'Person') { |
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$validation['warnings'][] = 'Author should be structured as a Person entity'; |
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} |
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} |
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|
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// Check for publisher |
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if (!isset($schema['publisher'])) { |
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$validation['suggestions'][] = 'Add publisher information for better credibility'; |
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} |
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|
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return $validation; |
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} |
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|
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/** |
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* Validate Product schema specific requirements |
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* PRESERVED: Exact same method logic from original Schema_Generator |
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* |
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* @since 1.0.0 |
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* |
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* @param array $schema Schema markup |
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* @param array $validation Current validation results |
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* @return array Updated validation results |
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*/ |
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private function validate_product_schema(array $schema, array $validation): array { |
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// Check for offers |
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if (!isset($schema['offers'])) { |
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$validation['suggestions'][] = 'Add price information with offers property'; |
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} else { |
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// Validate offers structure |
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$offers = $schema['offers']; |
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if (!isset($offers['@type']) || $offers['@type'] !== 'Offer') { |
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$validation['warnings'][] = 'Offers should be structured as an Offer entity'; |
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} |
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if (!isset($offers['price']) || !isset($offers['priceCurrency'])) { |
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$validation['warnings'][] = 'Offers should include price and priceCurrency'; |
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} |
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} |
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|
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// Check for brand |
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if (!isset($schema['brand'])) { |
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$validation['suggestions'][] = 'Add brand information to improve product visibility'; |
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} |
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|
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// Check for reviews or ratings |
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if (!isset($schema['review']) && !isset($schema['aggregateRating'])) { |
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$validation['suggestions'][] = 'Add reviews or ratings to improve product credibility'; |
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} |
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|
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return $validation; |
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} |
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|
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/** |
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* Validate Organization schema specific requirements |
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* PRESERVED: Exact same method logic from original Schema_Generator |
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* |
| 242 |
* @since 1.0.0 |
| 243 |
* |
| 244 |
* @param array $schema Schema markup |
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* @param array $validation Current validation results |
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* @return array Updated validation results |
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*/ |
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private function validate_organization_schema(array $schema, array $validation): array { |
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// Check for logo - properly check if it exists and has URL |
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if (!isset($schema['logo']) || empty($schema['logo']) || |
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(is_array($schema['logo']) && empty($schema['logo']['url']))) { |
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$validation['suggestions'][] = 'Add a logo to improve brand recognition'; |
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} |
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|
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// Check for contact information - properly validate the structure |
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if (isset($schema['contactPoint']) && !empty($schema['contactPoint']) && is_array($schema['contactPoint'])) { |
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$contact = $schema['contactPoint']; |
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|
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// Only suggest missing fields if they're actually missing |
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if (!isset($contact['telephone']) || empty($contact['telephone'])) { |
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$validation['suggestions'][] = 'Contact phone number is recommended for organization schema.'; |
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} |
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if (!isset($contact['email']) || empty($contact['email'])) { |
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$validation['suggestions'][] = 'Contact email is recommended for organization schema.'; |
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} |
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if (!isset($contact['contactType']) || empty($contact['contactType'])) { |
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$validation['suggestions'][] = 'Contact type is recommended for organization schema.'; |
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} |
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} else { |
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// Only suggest if contactPoint is completely missing or invalid |
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$validation['suggestions'][] = 'Contact information is recommended for organization schema.'; |
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} |
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|
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// Check for address (especially for LocalBusiness) |
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if ($schema['@type'] === 'LocalBusiness' && (!isset($schema['address']) || empty($schema['address']))) { |
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$validation['errors'][] = 'LocalBusiness requires an address'; |
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$validation['valid'] = false; |
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} |
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|
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// Check for social media profiles - properly validate array |
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if (!isset($schema['sameAs']) || empty($schema['sameAs']) || |
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(is_array($schema['sameAs']) && count(array_filter($schema['sameAs'], function($url) { |
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return !empty($url) && filter_var($url, FILTER_VALIDATE_URL); |
| 284 |
})) === 0)) { |
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$validation['suggestions'][] = 'Social media profiles (sameAs) are recommended for organization schema - add Facebook, Twitter, LinkedIn, Instagram, or YouTube URLs.'; |
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} |
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|
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return $validation; |
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} |
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|
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/** |
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* Validate LocalBusiness schema specific requirements |
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* |
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* @since 1.0.0 |
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* |
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* @param array $schema Schema markup |
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* @param array $validation Current validation results |
| 298 |
* @return array Updated validation results |
| 299 |
*/ |
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private function validate_local_business_schema(array $schema, array $validation): array { |
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// Check for logo - properly check if it exists and has URL |
| 302 |
if (!isset($schema['logo']) || empty($schema['logo']) || |
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(is_array($schema['logo']) && empty($schema['logo']['url']))) { |
| 304 |
$validation['suggestions'][] = 'Add a logo to improve brand recognition'; |
| 305 |
} |
| 306 |
|
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// LocalBusiness uses direct telephone property, not contactPoint |
| 308 |
if (!isset($schema['telephone']) || empty($schema['telephone'])) { |
| 309 |
$validation['suggestions'][] = 'Contact phone number is recommended for local business schema.'; |
| 310 |
} |
| 311 |
|
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// Check for address (required for LocalBusiness) |
| 313 |
if (!isset($schema['address']) || empty($schema['address'])) { |
| 314 |
$validation['errors'][] = 'LocalBusiness requires an address'; |
| 315 |
$validation['valid'] = false; |
| 316 |
} |
| 317 |
|
| 318 |
// Check for social media profiles - properly validate array |
| 319 |
if (!isset($schema['sameAs']) || empty($schema['sameAs']) || |
| 320 |
(is_array($schema['sameAs']) && count(array_filter($schema['sameAs'], function($url) { |
| 321 |
return !empty($url) && filter_var($url, FILTER_VALIDATE_URL); |
| 322 |
})) === 0)) { |
| 323 |
$validation['suggestions'][] = 'Social media profiles (sameAs) are recommended for local business schema.'; |
| 324 |
} |
| 325 |
|
| 326 |
return $validation; |
| 327 |
} |
| 328 |
|
| 329 |
/** |
| 330 |
* Validate Website schema specific requirements |
| 331 |
* |
| 332 |
* @since 1.0.0 |
| 333 |
* |
| 334 |
* @param array $schema Schema markup |
| 335 |
* @param array $validation Current validation results |
| 336 |
* @return array Updated validation results |
| 337 |
*/ |
| 338 |
private function validate_website_schema(array $schema, array $validation): array { |
| 339 |
// Check for logo - properly check both direct logo and publisher logo |
| 340 |
$has_logo = false; |
| 341 |
if (isset($schema['logo']) && !empty($schema['logo']) && |
| 342 |
(is_string($schema['logo']) || (is_array($schema['logo']) && !empty($schema['logo']['url'])))) { |
| 343 |
$has_logo = true; |
| 344 |
} elseif (isset($schema['publisher']['logo']) && !empty($schema['publisher']['logo']) && |
| 345 |
(is_string($schema['publisher']['logo']) || (is_array($schema['publisher']['logo']) && !empty($schema['publisher']['logo']['url'])))) { |
| 346 |
$has_logo = true; |
| 347 |
} |
| 348 |
|
| 349 |
if (!$has_logo) { |
| 350 |
$validation['suggestions'][] = 'No logo configured. Add a logo in Site Identity > Site Assets for better brand recognition.'; |
| 351 |
} |
| 352 |
|
| 353 |
// Check for search action (potentialAction) - properly validate structure |
| 354 |
if (!isset($schema['potentialAction']) || empty($schema['potentialAction']) || |
| 355 |
(is_array($schema['potentialAction']) && empty($schema['potentialAction']['@type']))) { |
| 356 |
$validation['suggestions'][] = 'Add search functionality with potentialAction for enhanced search box appearance.'; |
| 357 |
} |
| 358 |
|
| 359 |
// Check for publisher information - properly validate structure |
| 360 |
if (!isset($schema['publisher']) || empty($schema['publisher']) || |
| 361 |
(is_array($schema['publisher']) && empty($schema['publisher']['name']))) { |
| 362 |
$validation['suggestions'][] = 'Add publisher information for better website credibility.'; |
| 363 |
} |
| 364 |
|
| 365 |
return $validation; |
| 366 |
} |
| 367 |
|
| 368 |
/** |
| 369 |
* Validate FAQ schema specific requirements |
| 370 |
* PRESERVED: Exact same method logic from original Schema_Generator |
| 371 |
* |
| 372 |
* @since 1.0.0 |
| 373 |
* |
| 374 |
* @param array $schema Schema markup |
| 375 |
* @param array $validation Current validation results |
| 376 |
* @return array Updated validation results |
| 377 |
*/ |
| 378 |
private function validate_faq_schema(array $schema, array $validation): array { |
| 379 |
// Check minimum number of questions |
| 380 |
if (isset($schema['mainEntity']) && count($schema['mainEntity']) < 2) { |
| 381 |
$validation['warnings'][] = 'FAQ pages should have at least 2 questions for optimal SEO'; |
| 382 |
} |
| 383 |
|
| 384 |
// Validate question structure |
| 385 |
if (isset($schema['mainEntity']) && is_array($schema['mainEntity'])) { |
| 386 |
foreach ($schema['mainEntity'] as $index => $question) { |
| 387 |
if (!isset($question['@type']) || $question['@type'] !== 'Question') { |
| 388 |
$validation['warnings'][] = "FAQ item {$index} should be structured as a Question entity"; |
| 389 |
} |
| 390 |
if (!isset($question['acceptedAnswer'])) { |
| 391 |
$validation['errors'][] = "FAQ question {$index} is missing acceptedAnswer"; |
| 392 |
$validation['valid'] = false; |
| 393 |
} |
| 394 |
} |
| 395 |
} |
| 396 |
|
| 397 |
return $validation; |
| 398 |
} |
| 399 |
|
| 400 |
/** |
| 401 |
* Add SEO-specific suggestions |
| 402 |
* PRESERVED: Exact same method logic from original Schema_Generator |
| 403 |
* |
| 404 |
* @since 1.0.0 |
| 405 |
* |
| 406 |
* @param array $schema Schema markup |
| 407 |
* @param string $schema_type Schema type |
| 408 |
* @param array $validation Current validation results |
| 409 |
* @return array Updated validation results |
| 410 |
*/ |
| 411 |
private function add_seo_suggestions(array $schema, string $schema_type, array $validation): array { |
| 412 |
// General SEO suggestions |
| 413 |
if (!isset($schema['description'])) { |
| 414 |
$validation['suggestions'][] = 'Add a description to improve search result snippets'; |
| 415 |
} |
| 416 |
|
| 417 |
if (!isset($schema['url'])) { |
| 418 |
$validation['suggestions'][] = 'Add a URL to help search engines understand the content location'; |
| 419 |
} |
| 420 |
|
| 421 |
// Type-specific SEO suggestions |
| 422 |
switch ($schema_type) { |
| 423 |
case 'Article': |
| 424 |
case 'BlogPosting': |
| 425 |
if (!isset($schema['dateModified'])) { |
| 426 |
$validation['suggestions'][] = 'Add dateModified to show content freshness'; |
| 427 |
} |
| 428 |
if (!isset($schema['wordCount'])) { |
| 429 |
$validation['suggestions'][] = 'Add wordCount for better content analysis'; |
| 430 |
} |
| 431 |
break; |
| 432 |
|
| 433 |
case 'Product': |
| 434 |
if (!isset($schema['sku'])) { |
| 435 |
$validation['suggestions'][] = 'Add SKU for better product identification'; |
| 436 |
} |
| 437 |
break; |
| 438 |
} |
| 439 |
|
| 440 |
return $validation; |
| 441 |
} |
| 442 |
} |
| 443 |
|
