Extension.php

<?php

namespace Bolt\Extension\blockmurder\Gallery;

use Bolt\Application;

/**
 * Class Extension
 * @package Gallery
 * @author  blockmurder (info@blockmurder.ch)
 */

class Extension extends \Bolt\BaseExtension
{
  public function getName()
  {
    return "Gallery";
  }

  public function initialize()
  {
    $this->config = $this->getConfig();

    // If your extension has a 'config.yml', it is automatically loaded.
    if (!isset($this->config['gallery_path'])) { $this->config['gallery_path'] = "galleries/"; }
    if (!isset($this->config['pathstructure'])) { $this->config['pathstructure'] = "by_year"; }

    // Initialize the Twig function
    $this->addTwigFunction('GalleryList', 'twigGalleryList');
    $this->addTwigFunction('GalleryPreview', 'twigGalleryPreview');

  }

  public function twigGalleryList($slug="")
  {
    $images=$this->get_images($slug);
    $image_infos = $this->get_image_infos($images);

    return $image_infos;
  }

  public function twigGalleryPreview($slug="")
  {
    $images=$this->get_images($slug, $slugDate);
    return $images['online'].basename($images['images'][0]);
  }

  private function get_images($slug)
  {
    $contenttypes = $this->app['config']->get('contenttypes');
    $records = $this->app['storage']->getContent('galleries');

    foreach( $records as $record){
      if( $record['slug'] == $slug ){
        $record_found = $record;
        break;
      }
    }
    $date_conv = strtotime($record_found['datecreated']);
    if($this->config['pathstructure']== 'unsorted') {
      $folder = '/'.$slug.'/';
    }
    elseif($this->config['pathstructure']== 'by_year') {
      $folder = '/'.date('Y',$date_conv).'/'.date('F',$date_conv).'/'.$slug.'/';
    }
    else {
      $folder = '/';
      echo "path could not be set, please check pathstructure in settings!";
    }

    $path = $this->app['paths']['filespath'].'/'.$this->config['gallery_path'].$folder;
    $online_path = $this->config['gallery_path'].$folder;
    $images = glob($path . "*.{jpg,JPG,jpeg,JPEG}", GLOB_BRACE);
    $return_val = array(
                          "images" => $images,
                          "online" => $online_path,
                        );

    return $return_val;
  }

  private function get_image_infos($images)
  {
    $image_array =array();
    foreach( $images['images'] as $image) {
      $path_parts = pathinfo($image);

      $exif_ifd0 = exif_read_data ( $image ,'IFD0' ,0 );
      $exif = exif_read_data ( $image ,'EXIF' ,0 );

      $data['path']  = $images['online'].$path_parts['basename'];
      $data['name'] = preg_replace("/[^a-z0-9öäü.]+/i", " ", $path_parts['filename']);
      $data['uploadDate']  = date ("Y-m-d H:i:s", filemtime($image));
      $data['model'] = $exif_ifd0['Model'];
      $data['lens'] = $exif['XMP']['Lens'];
      $data['focalLength'] = $this->exif_get_length($exif);
      $data['shutterSpeed'] = $this->exif_get_shutter($exif);
      $data['fStop'] = $this->exif_get_fstop($exif);
      $data['iso'] = $exif['ISOSpeedRatings'];
      $time = explode(" ", $exif_ifd0['DateTime']);
      $data['time'] = str_replace(':', '-', $time[0]).' '.$time[1];
      array_push($image_array,$data);
    }
    return $image_array;
  }

  private function exif_get_float($value)
  {
    $pos = strpos($value, '/');
    if ($pos === false) return (float) $value;
    $a = (float) substr($value, 0, $pos);
    $b = (float) substr($value, $pos+1);
    return ($b == 0) ? ($a) : ($a / $b);
  }

  private function exif_get_shutter(&$exif)
  {
    if (!isset($exif['ExposureTime'])) return false;
    $shutter = $this->exif_get_float($exif['ExposureTime']);
    if ($shutter == 0) return false;
    if ($shutter >= 1) return round($shutter) . 's';
    return '1/' . round(1 / $shutter) . 's';
  }

  private function exif_get_fstop(&$exif)
  {
    if (!isset($exif['FNumber'])) return false;
    $fstop  = $this->exif_get_float($exif['FNumber']);
    if ($fstop == 0) return false;
    return 'f/' . round($fstop,1);
  }

  private function exif_get_length(&$exif)
  {
    if (!isset($exif['FocalLength'])) return false;
    $fstop  = $this->exif_get_float($exif['FocalLength']);
    if ($fstop == 0) return false;
    return round($fstop,1).'mm';
  }
}