parse method

ParsedTurn parse(String generated)

Parses one raw generated turn into prose plus any tool calls.

Throws FormatException when the [TOOL_CALLS] body is not a valid JSON array so the decoder can fall back to raw text.

Implementation

ParsedTurn parse(String generated) {
  final at = generated.indexOf(toolCalls);
  if (at < 0) {
    return ParsedTurn(text: generated.trim(), calls: const []);
  }
  final text = generated.substring(0, at).trim();
  final body = generated.substring(at + toolCalls.length).trim();
  final decoded = jsonDecode(body);
  if (decoded is! List) {
    throw FormatException('Tool calls are not a JSON array', body);
  }
  final calls = <FunctionCallContent>[];
  for (final entry in decoded) {
    if (entry is! Map) {
      throw FormatException('Tool call is not a JSON object', body);
    }
    final args = (entry['arguments'] ?? entry['parameters']) as Map?;
    calls.add(
      FunctionCallContent(
        callId: 'call_${calls.length}',
        name: entry['name'] as String? ?? '',
        arguments: args?.cast<String, Object?>() ?? const <String, Object?>{},
      ),
    );
  }
  return ParsedTurn(text: text, calls: calls);
}