<?php
/*------------------------------------------------------------------------------------------------------/
				Holger Genth -Dienstleistungen-
/-------------------------------------------------------------------------------------------------------/

	@version		1.0.0
	@created		7th July, 2017
	@package		mod_hgd-image-compare
	@author			Holger Genth <https://holger-genth.de/joomla/>
	@copyright		Copyright (C) 2017. All Rights Reserved
	@license		GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
/------------------------------------------------------------------------------------------------------*/

// No direct access
defined('_JEXEC') or die;

class ModHgdImageCompare {
    public static function makeRGBA($hex, $opacity) {
      $matches = array(00,00,00);
      $ret = "rgba(";

      preg_match('/#{0,1}([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/',$hex,$matches);

      $ret .= hexdec($matches[1]) . ", " . hexdec($matches[2]) . ", " . hexdec($matches[3]) . ", " . ($opacity/100) .")";

      return $ret;
    }

    // Bereitet Daten für das Plugin vor
    public static function prepare($params) {
      $base = JURI::base();
      $OPTIONS = array(
        "container" => array(
          "width" => $params->get("width"),
          "height" => $params->get("height"),
          "maxWidth" => $params->get("max_width"),
          "maxHeight" => $params->get("max_height"),
        ),
        "controls" => array(
          "bgcolor" => $params->get("bgcolor"),
          "opacity" => $params->get("opacity")
        ),
        "autoHeight" => ($params->get("height") == "auto"),
        "image1" => array(
          "file" => $_SERVER["DOCUMENT_ROOT"].'/'.$params->get('image1'),
          "src" => $base.'/'.$params->get('image1'),
          "title" => $params->get('title1'),
          "width" => 0,
          "height" => 0,
          "aspect" => 1.0
        ),
        "image2" => array(
          "file" => $_SERVER["DOCUMENT_ROOT"].'/'.$params->get('image2'),
          "src" => $base.'/'.$params->get('image2'),
          "title" => $params->get('title2'),
          "width" => 0,
          "height" => 0,
          "aspect" => 1.0
        )
      );

      $STAGES = array();

      // Größe der Bilder ermitteln und speichern
      $imagesize = @getimagesize( $OPTIONS["image1"]["file"] );

      if (is_array($imagesize) && count($imagesize)>=2) {

        $OPTIONS["image1"]["width"]  = $imagesize[0];
        $OPTIONS["image1"]["height"] = $imagesize[1];
        $OPTIONS["image1"]["aspect"] = $imagesize[0] / $imagesize[1];

      }

      $imagesize = @getimagesize( $OPTIONS["image2"]["file"] );

      if (is_array($imagesize) && count($imagesize)>=2) {

        $OPTIONS["image2"]["width"]  = $imagesize[0];
        $OPTIONS["image2"]["height"] = $imagesize[1];
        $OPTIONS["image2"]["aspect"] = $imagesize[0] / $imagesize[1];

      }

      $maxWidth = ( $OPTIONS["container"]["maxWidth"] !==0 )  ? "max-width: ".$OPTIONS["container"]["maxWidth"] : "";
      $maxHeight = ( $OPTIONS["container"]["maxHeight"] !==0 )  ? "max-height: ".$OPTIONS["container"]["maxHeight"] : "";

      // add necessary files to the document
      JHtml::_('jquery.framework');

      $doc = JFactory::getDocument();
      if (JDEBUG) {
        $doc->addStyleSheet($base."modules/mod_hgd-image-compare/assets/css/mod_hgd-image-compare.css");
        $doc->addScript($base."modules/mod_hgd-image-compare/assets/js/mod_hgd-image-compare.js");
      } else {
        $doc->addStyleSheet($base."modules/mod_hgd-image-compare/assets/css/mod_hgd-image-compare.min.css");
        $doc->addScript($base."modules/mod_hgd-image-compare/assets/js/mod_hgd-image-compare.min.js");
      }
      $doc->addStyleSheet($base.'/media/jui/css/icomoon.css');

      $doc->addScriptDeclaration("
        (function($){
          $(document).ready(function(){
            var config = ".json_encode($OPTIONS).";
            $('.hgd_image-compare').hgdImageCompare(config);
          });
        })(jQuery)
      ");

      $doc->addStyleDeclaration("
        div.hgd_image-compare {
          width:". $OPTIONS["container"]["width"] .";
          height:". $OPTIONS["container"]["height"] .";
          ". $maxWidth ."px;
          ". $maxHeight ."px;
        }

        .hgd_image-compare .separator,
        .hgd_image-compare .separator .handler{
          background-color: " . self::makeRGBA($OPTIONS["controls"]["bgcolor"], $OPTIONS["controls"]["opacity"]) . ";
        }
      ");

      return $OPTIONS;
    }
}