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<?php |
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/** |
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* SchemaTranslator — adapts ability JSON Schemas per provider. |
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* |
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* Anthropic and OpenAI accept the ability schemas as-is. Gemini's |
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* functionDeclarations accept only a restricted OpenAPI-style subset, so |
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* unsupported keywords are stripped recursively. |
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* |
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* @package WPFunnels\AI |
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* @since 3.13.0 |
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*/ |
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|
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namespace WPFunnels\AI\Providers; |
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|
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defined( 'ABSPATH' ) || exit; |
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|
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/** |
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* Class SchemaTranslator |
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*/ |
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class SchemaTranslator { |
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|
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/** |
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* Keys Gemini accepts inside a schema node. |
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*/ |
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private const GEMINI_ALLOWED = [ 'type', 'description', 'properties', 'required', 'items', 'enum', 'nullable', 'format' ]; |
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|
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/** |
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* Formats Gemini accepts. |
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*/ |
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private const GEMINI_ALLOWED_FORMATS = [ 'enum', 'date-time' ]; |
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|
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/** |
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* Sanitize a JSON Schema for Gemini functionDeclarations.parameters. |
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* |
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* @param array $schema Ability input schema. |
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* @return array |
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*/ |
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public static function forGemini( $schema ) { |
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$clean = []; |
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|
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foreach ( (array) $schema as $key => $value ) { |
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if ( ! in_array( $key, self::GEMINI_ALLOWED, true ) ) { |
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continue; |
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} |
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if ( 'format' === $key && ! in_array( $value, self::GEMINI_ALLOWED_FORMATS, true ) ) { |
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continue; |
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} |
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if ( 'properties' === $key && is_array( $value ) ) { |
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$props = []; |
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foreach ( $value as $prop => $prop_schema ) { |
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$props[ $prop ] = is_array( $prop_schema ) ? self::forGemini( $prop_schema ) : $prop_schema; |
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} |
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// Gemini rejects empty properties objects on type:object nodes. |
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if ( ! empty( $props ) ) { |
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$clean['properties'] = $props; |
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} |
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continue; |
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} |
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if ( 'items' === $key && is_array( $value ) ) { |
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$clean['items'] = self::forGemini( $value ); |
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continue; |
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} |
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$clean[ $key ] = $value; |
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} |
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|
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// An object schema with no properties confuses Gemini — degrade gracefully. |
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if ( isset( $clean['type'] ) && 'object' === $clean['type'] && empty( $clean['properties'] ) ) { |
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$clean['properties'] = [ |
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'_' => [ |
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'type' => 'string', |
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'description' => 'Unused placeholder.', |
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], |
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]; |
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} |
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|
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return $clean; |
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} |
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} |
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|
