photo_library_image.php

<?php
require_once 'n_model.php';

class PhotoLibraryImage extends NModel {
  function __construct() {
    $this->__table = 'photo_library_image';
    $this->form_ignore_fields = array('image_web_170', 'image_web_400', 'image_web_960');
    $this->form_elements['image_full'] = array('cms_file', 'image_full', 'High Res Image');
    $this->form_required_fields = array('photo_title', 'image_full');
    $this->_order_by = 'cms_headline';
    parent::__construct();
  }

  function beforeUpdate() {
    require_once 'n_image.php';
    $this->processFullImage();
    $this->fetch(); // Filename may have changed...
    $this->generateSizes();
  }

  function processFullImage(){
    $image = new NImage();
    $image->checkImageFormat('JPG', $this->image_full, 'photo_library_image', 'image_full', $this->id);
  }

  function generateSizes() {
    $this->image_web_960 = $this->scale($this->image_full, 960);
    $this->image_web_400 = $this->scale($this->image_full, 400);
    $this->image_web_170 = $this->thumbnail($this->image_full, 170, 115);
  }

  function thumbnail($file, $width, $height) {
    $path_parts = explode('.', $file);
    $path = $_SERVER['DOCUMENT_ROOT'] . $file;
    $outfile = $path_parts[0].".{$width}x{$height}.jpg";
    $outpath = $_SERVER['DOCUMENT_ROOT'] . $outfile;
    echo 'generating'.$outpath;

    if (file_exists($outpath)) return $outfile;

    $image = new Imagick();
    $image->readImage("$path");
    $image->cropThumbnailImage($width, $height);
    $image->writeImage($outpath);
    echo 'wrote'.$outpath;
    $image->destroy();
    return $outfile;
  }

  function scale($file, $width) {
    $path_parts = explode('.', $file);
    $path = $_SERVER['DOCUMENT_ROOT'] . $file;
    $outfile = $path_parts[0].".{$width}.jpg";
    $outpath = $_SERVER['DOCUMENT_ROOT'] . $outfile;
    echo 'generating'.$outpath;

    if (file_exists($outpath)) return $outfile;

    $image = new Imagick();
    $image->readImage("$path");
    $image->resizeImage($width, 0, Imagick::FILTER_GAUSSIAN, 1);
    $image->setImageCompressionQuality(85);
    $image->writeImage($outpath);
    echo 'wrote'.$outpath;
    $image->destroy();
    return $outfile;
  }
}