api.emotionhero.com/src/Api/InterfaceControllerProvider.php

<?php
namespace EmotionHero\Api;

use EmotionHero\Application as EH;
use Silex\Application;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\JsonResponse;
use Silex\Api\ControllerProviderInterface;
use EmotionHero\Models;
use EmotionHero\Server\Websockets;

class InterfaceControllerProvider implements ControllerProviderInterface
{
    /** @var EH */
    protected $_eh;

    public function __construct()
    {
        $this->_eh = EH::getInstance();
    }

    public function connect(Application $app)
    {
        // creates a new controller based on the default route
        $controllers = $app['controllers_factory'];

        $controllers->get('/images', function (Application $app) {

            $getEmoBlocks = function($emotion, $feature, $steps = 6) {
                $hitRepo = $this->_eh->getEm()->getRepository(Models\Hit::class);
                $blocks = [];
                $position = 1;
                foreach(range(0, 100, 100/($steps-1)) as $i) {
                    /* @var $hitRepo EmotionHero\Models\HitRepository */
                    $hit = $hitRepo->getClosestHitWithImage($emotion, $i);
                    $img = "data:image/x-icon;base64,".$hit->getFeatureImgAsString($feature);
                    $score = $hit->getEmotions()->getEmotionScore($emotion);
                    $percentage = sprintf("%.0f %%",$score);
                    $blocks[$position] = [
                        'hit_id' => $hit->getId(),
                        'img_data' => $img,
                        'percentage' => $percentage,
                    ];
                    $position++;
                }
                return $blocks;
            };

            $features = ['brows' => 6, 'nose' => 5, 'mouth' => 8];

            $output = [];

            foreach($features as $feature => $steps) {
                foreach(Models\Emotions::$EMOTIONS as $emotion) {
                    $output[$feature][$emotion] = $getEmoBlocks(
                        $emotion,
                        $feature == 'mouth' ? 'mouth_left':$feature,
                        $steps
                        );
                }
            }

            return $app['serializer']->serialize($output, 'json');
        });


        return $controllers;
    }
}