FeedController

        // This is the rawData, key'd by date
        $dataKey = sha1(serialize($config) . date('d m Y H'));
// testing, no cache
$this->cacheService->removeItem($dataKey);
        // Use cacheService
        if (!$data = $this->cacheService->getItem($dataKey)) {
            $data = $this->weatherService->fetchWeatherData($config);
            $data = json_encode($data);

            $this->cacheService->setItem($dataKey, $data);
        }

        return new JsonModel(array_merge(json_decode($data, true), ['test' => 'voilà']));

Meteo

<?php

use Zend\Dom\Document;
use Zend\Stdlib\ErrorHandler;

class Meteo
{
    public function fetchFeed(array $configuration)
    {
        $data = '';

        ErrorHandler::start(\E_ALL);

        // $configuration['url'] = ['ftp://site'];

        foreach ((array) $configuration['url'] as $url) {
            $content = file_get_contents($url);
            $content = mb_convert_encoding($content, 'UTF-8', 'HTML-ENTITIES');
            /* $content = '
 <div id="hpw_1">
   <span class="hpw_date_short">Me</span>
   <span class="hpw_date_long">Mercredi</span>
   <span class="hpw_comma">, </span>
   <span class="hpw_date_exp">18 février 2015</span>
   <span class="hpw_date_num">18.2.</span>
   <span id="hpw_img_1" class="hpw_img_code_4"></span>
   <span class="hpw_txt">changeant à nuageux</span>
   <span class="hpw_temp_min">0°</span>
   <span class="hpw_temp_delim">|</span>
   <span class="hpw_temp_max">5°</span>
 </div>
 <div id="hpw_2">
   <span class="hpw_date_short">Je</span>
   <span class="hpw_date_long">Jeudi</span>
   <span class="hpw_comma">, </span>
   <span class="hpw_date_exp">19 février 2015</span>
   <span class="hpw_date_num">19.2.</span>
   <span id="hpw_img_2" class="hpw_img_code_27"></span>
   <span class="hpw_txt">stratus</span>
   <span class="hpw_temp_min">-1°</span>
   <span class="hpw_temp_delim">|</span>
   <span class="hpw_temp_max">6°</span>
 </div>
 '; */
            $file    = substr(strrchr($url, '/'), 1);

            $data   .= sprintf('<content url="%s">%s</content>', $file, $content);
        }

        ErrorHandler::stop(true);

        return $data;
    }

    /**
     * {@inheritdoc}
     */
    public function processFeed($data, array $configuration)
    {
        $document  = new Document($data);
        $forecasts = [];

        $dayForecasts = Document\Query::execute('//*/div[@id!="hpw"]', $document);

        foreach ($dayForecasts as $forecast) {
            $html = $forecast->ownerDocument->saveHTML($forecast);
            $forecastDoc = new Document($html);

            $spans = Document\Query::execute('//span', $forecastDoc);

            $spanData = [];
            foreach($spans as $span) {
                $id    = $span->attributes->getNamedItem('id');
                $id    = isset($id) ? $id->nodeValue : null;
                $class = $span->attributes->getNamedItem('class');
                $class = isset($class) ? $class->nodeValue : null;

                // Strip numbers from class and use as key [as numbers increment per day]
                $spanData[preg_replace('#\d+#', '', $class)] = [
                    'id'      => $id,
                    'class'   => $class,
                    'content' => $span->textContent,
                ];
            }

            // Strip content and only keep year
            $year = preg_replace('#.+(\d{4})#', '$1', $spanData['hpw_date_exp']['content']);
            $date = sprintf('%s.%s 00:00', rtrim($spanData['hpw_date_num']['content'], '.'), $year);
            $date = \DateTime::createFromFormat('d.m.Y H:i', $date)->format('Y-m-d H:i');

            $forecasts[$date] = $spanData;
        }

        // For better view
        ksort($forecasts);

        return $forecasts;
    }

    /**
     * {@inheritdoc}
     */
    public function filter($data, array $configuration)
    {
        $forecastData = [];

        foreach($data as $key => $day) {
            $forecast   = new Feed\Forecast();
            $forecast->setSource('meteosuisse');

            $dateTime = new \DateTime($key);
            $forecast->setDateTime($dateTime);

            $weather     = new Feed\Weather();
            $temperature = new Feed\Temperature();

            $weather->setDescription($day['hpw_txt']['content']);
            $weather->setIcon($day['hpw_img_code_']['class']);
            $weather->setId($day['hpw_img_code_']['class']);
            $weather->setIconSet('meteosuisse');

            $tempDay = isset($day['hpw_temp_']['content']) ? $day['hpw_temp_']['content'] : null;
            $temperature->setDay($tempDay);

            $tempMin = isset($day['hpw_temp_min']['content']) ? $day['hpw_temp_min']['content'] : null;
            $temperature->setMin($tempMin);

            $tempMax = isset($day['hpw_temp_max']['content']) ? $day['hpw_temp_max']['content'] : null;
            $temperature->setMax($tempMax);

            // Set sub-objects
            $forecast->setWeather($weather)
                ->setTemperature($temperature);

            $forecastData[$dateTime->format(AbstractProcessor::DATE_FORMAT)] = $forecast;
        }

        return $forecastData;
    }
}

WeatherService

<?php

use GuzzleHttp\Client;
use Zend\Stdlib\Hydrator\ClassMethods;

class WeatherService
{
    /**
     * @param Client $client
     */
    public function __construct(Client $client)
    {
        $this->client = $client;
    }

    public function fetchWeatherData(array $configuration)
    {
        // Config check
        if (!isset($configuration['processor']) || !class_exists($configuration['processor'])) {
            throw new \Exception(
                sprintf('Invalid processor "%s" in configuration', $configuration['processor'])
            );
        }

        // Fetch the feed
        $processor = new $configuration['processor']($this->client);

        $data = $processor->fetchFeed($configuration);

        // Process it
        $data = $processor->processFeed($data, $configuration);

        // Filter it
        $data = $processor->filter($data, $configuration);

        // Extract object to array
        foreach($data as $date => &$forecast) {
            $forecast = (array) $forecast;

            // Replace Forecast keys from object class name to readable string
            $result = preg_replace('#.+\x00#', '', array_keys($forecast));
            $forecast = array_combine($result, array_values($forecast));

            // For each 'object' in Forecast, replace
            foreach($forecast as $key => &$object) {
                $object = (array) $object;

                // Replace 'Object' keys from object class name to readable string
                $result = preg_replace('#.+\x00#', '', array_keys($object));
                $object = array_combine($result, array_values($object));

                $forecast[$key] = $object;
            }
        }

        return $data;
    }
}