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<?php |
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|
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namespace Better_Payment\Lite\AI\Services; |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* Turns a raw provider chat result into a clean list of candidate operations. |
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* |
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* Primary path: the provider returned structured tool calls. Fallback path: some |
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* models describe operations as a JSON block inside the text reply — we recover |
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* those too. Everything returned here is still *unvalidated* and must pass |
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* {@see \Better_Payment\Lite\AI\Operations\OperationValidator} before use. |
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*/ |
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class ResponseValidator { |
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|
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/** |
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* Extract candidate operations (wire shape: [ 'op' => name, ...args ]). |
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* |
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* @param array $chat_result Normalised provider result (text, tool_calls, ...). |
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* @return array<int, array> |
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*/ |
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public static function extract_operations( array $chat_result ): array { |
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$operations = []; |
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|
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foreach ( (array) ( $chat_result['tool_calls'] ?? [] ) as $call ) { |
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$name = $call['name'] ?? ''; |
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if ( '' === $name ) { |
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continue; |
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} |
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$args = is_array( $call['arguments'] ?? null ) ? $call['arguments'] : []; |
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$operations[] = array_merge( [ 'op' => $name ], $args ); |
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} |
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|
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// Fallback: recover a JSON operations block from the text reply. |
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if ( empty( $operations ) ) { |
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$operations = self::recover_from_text( (string) ( $chat_result['text'] ?? '' ) ); |
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} |
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|
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return $operations; |
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} |
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|
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/** |
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* Best-effort recovery of an operations array embedded in free text. |
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* |
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* Looks for a fenced ```json block or a bare JSON object/array containing an |
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* `operations` key or a top-level array of operation objects. |
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* |
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* @return array<int, array> |
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*/ |
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public static function recover_from_text( string $text ): array { |
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if ( '' === trim( $text ) ) { |
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return []; |
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} |
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|
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$candidates = []; |
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|
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// Fenced code block(s). |
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if ( preg_match_all( '/```(?:json)?\s*(.+?)```/s', $text, $matches ) ) { |
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foreach ( $matches[1] as $block ) { |
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$candidates[] = $block; |
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} |
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} |
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// The whole text as a last resort. |
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$candidates[] = $text; |
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|
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foreach ( $candidates as $candidate ) { |
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$decoded = json_decode( trim( $candidate ), true ); |
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if ( ! is_array( $decoded ) ) { |
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continue; |
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} |
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if ( isset( $decoded['operations'] ) && is_array( $decoded['operations'] ) ) { |
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return array_values( array_filter( $decoded['operations'], 'is_array' ) ); |
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} |
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// A bare list of operation objects. |
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if ( self::looks_like_op_list( $decoded ) ) { |
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return array_values( array_filter( $decoded, 'is_array' ) ); |
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} |
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} |
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|
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return []; |
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} |
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|
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/** |
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* @param array $value |
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*/ |
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private static function looks_like_op_list( array $value ): bool { |
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if ( empty( $value ) || ! isset( $value[0] ) || ! is_array( $value[0] ) ) { |
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return false; |
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} |
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return isset( $value[0]['op'] ) || isset( $value[0]['operation'] ) || isset( $value[0]['type'] ); |
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} |
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} |
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|
