<?php
declare(strict_types=1);
namespace Butschster\ContextGenerator\McpServer\Prompt;
use Butschster\ContextGenerator\Lib\Variable\Provider\ConfigVariableProvider;
use Butschster\ContextGenerator\Lib\Variable\VariableReplacementProcessor;
use Butschster\ContextGenerator\Lib\Variable\VariableResolver;
use Butschster\ContextGenerator\McpServer\Prompt\Extension\PromptDefinition;
use Mcp\Types\PromptMessage;
use Mcp\Types\TextContent;
final readonly class PromptMessageProcessor
{
public function __construct(
private VariableResolver $variables,
) {}
public function process(PromptDefinition $prompt, array $arguments = []): PromptDefinition
{
$variables = $this->variables;
return $prompt->withMessages(\array_map(static function ($message) use ($variables, $arguments) {
$content = $message->content;
if ($content instanceof TextContent) {
$text = $variables->with(
new VariableReplacementProcessor(new ConfigVariableProvider($arguments)),
)->resolve($content->text);
$content = new TextContent($text);
}
return new PromptMessage(
role: $message->role,
content: $content,
);
}, $prompt->messages));
}
}
