Generate In-Context Examples

<?php



$loader = require 'vendor/autoload.php';

$loader->add('Cognesy\\Instructor\\', __DIR__ . '../../src/');



use Cognesy\Instructor\Extras\Scalar\Scalar;

use Cognesy\Instructor\Extras\Sequence\Sequence;

use Cognesy\Instructor\Features\Core\Data\Example;

use Cognesy\Instructor\Instructor;



enum ReviewSentiment : string {

    case Positive = 'positive';

    case Negative = 'negative';

}



class GeneratedReview {

    public string $review;

    public ReviewSentiment $sentiment;

}





class PredictSentiment {

    private int $n = 4;



    public function __invoke(string $review) : ReviewSentiment {

        return (new Instructor)->respond(

            messages: [

                ['role' => 'user', 'content' => "Review: {$review}"],

            ],

            responseModel: Scalar::enum(ReviewSentiment::class),

            examples: $this->generateExamples($review),

        );

    }



    private function generate(string $inputReview, ReviewSentiment $sentiment) : array {

        return (new Instructor)->respond(

            messages: [

                ['role' => 'user', 'content' => "Generate {$this->n} various {$sentiment->value} reviews based on the input review:\n{$inputReview}"],

                ['role' => 'user', 'content' => "Generated review:"],

            ],

            responseModel: Sequence::of(GeneratedReview::class),

        )->toArray();

    }



    private function generateExamples(string $inputReview) : array {

        $examples = [];

        foreach ([ReviewSentiment::Positive, ReviewSentiment::Negative] as $sentiment) {

            $samples = $this->generate($inputReview, $sentiment);

            foreach ($samples as $sample) {

                $examples[] = Example::fromData($sample->review, $sample->sentiment->value);

            }

        }

        return $examples;

    }

}



$predictSentiment = (new PredictSentiment)('This movie has been very impressive, even considering I lost half of the plot.');



dump($predictSentiment);

?>