<?php

  class mw_data_thumbs extends mw_data{

    public function mw_thumbs_activated(){
      return true;
    }

    public function img_thumb($src, $max_width, $max_height, $thumbs_dir = "", $background_color = array(255, 255, 255), $CROP = false){
      if(strlen($thumbs_dir) > 0){
        if(!@is_dir($thumbs_dir)) @mkdir($thumbs_dir);
        if(!@is_dir($thumbs_dir)) return false;
      }
      $thumbs_dir .= strlen($thumbs_dir) > 0 && substr($thumbs_dir, -1) != "/" ? "/" : "";
      $thumb_dir = $max_width."x".$max_height."/";
      if(!@is_dir($thumbs_dir.$thumb_dir)) @mkdir($thumbs_dir.$thumb_dir);
      if(!@is_dir($thumbs_dir.$thumb_dir)) return false;
      if(
        (
          $thumbs = $this->data_list(
            array(
              "table_name" => "thumbs",
              "filters" => array(
                array("src", "eq", $src),
                array("max_width", "eq", $max_width),
                array("max_height", "eq", $max_height)
              )
            )
          )
        ) === false
      ){
        return false;
      }
      if($thumbs["list"]){
        $thumb = reset($thumbs["list"]);
        if(file_exists($thumbs_dir.$thumb["thumb_file"])){
          return $thumb;
        }
        if(
          !$this->data_delete(
            array(
              "table_name" => "thumbs",
              "index_name" => "id",
              "index_value" => $thumb["id"]
            )
          )
        ){
          return false;
        }
      }
      if(($thumb_file = $this->new_thumb_file_name($thumbs_dir.$thumb_dir, $src, "img_")) === false){
        return false;
      }
      $thumb_file = $thumb_dir.$thumb_file;
      if(
        (
          $thumb = $this->make_thumb(
            $src,
            $max_width,
            $max_height,
            $thumbs_dir,
            $thumb_file,
            null,
            $background_color,
            $CROP
          )
        ) === false
      ){
        return false;
      }
      if(
        !$this->data_insert(
          array(
            "table_name" => "thumbs",
            "values" => array(
              "src" => $thumb["src"],
              "src_width" => $thumb["src_width"],
              "src_height" => $thumb["src_height"],
              "max_width" => $max_width,
              "max_height" => $max_height,
              "thumb_file" => $thumb["thumb_file"],
              "thumb_width" => $thumb["thumb_width"],
              "thumb_height" => $thumb["thumb_height"],
              "creation_date" => date("Y-m-d H:i:s")
            )
          )
        )
      ){
        return false;
      }
      return $thumb;
    }

    public function make_thumb(
      $src,
      $max_width,
      $max_height,
      $thumbs_dir,
      $thumb_file,
      $quality = null,
      $background_color = array(255, 255, 255),
      $CROP = false
    ){
      $dest = $thumbs_dir.$thumb_file;
      if(!($size = @getimagesize($src))) return false;
      if($size[0]){
        if($size[0] > $size[1]){
          $width = $max_width;
          $height = ($size[1] * ($width / $size[0]));
        }
        else{
          $height = $max_height;
          $width = $size[0] * ($height / $size[1]);
        }
        $v_ext_path = explode(".", $src);
        $ext = $v_ext_path[count($v_ext_path) - 1];
        if(strcasecmp($ext, "jpg") == 0 || strcasecmp($ext, "jpeg") == 0)  $ext = "jpg";
        elseif(strcasecmp($ext, "gif") == 0)  $ext = "gif";
        elseif(strcasecmp($ext, "png") == 0)  $ext = "png";
        else $ext = "";
        $create_function = "";
        $thumb_function = "";
        if(strcasecmp($ext, "jpg") == 0){
          $create_function = "imagecreatefromjpeg";
          $thumb_function = "imagejpeg";
        }
        elseif(strcasecmp($ext, "gif") == 0){
          $create_function = "imagecreatefromgif";
          $thumb_function = "imagegif";
          $quality = NULL;
        }
        elseif(strcasecmp($ext, "png") == 0){
          $create_function = "imagecreatefrompng";
          $thumb_function = "imagepng";
        }
        if($create_function){
          $src_img = $create_function($src);
          $thumb_img = imagecreatetruecolor($max_width, $max_height);
          $thumb_bkg = imagecolorallocate($thumb_img, $background_color[0], $background_color[1], $background_color[2]);
          imagefilledrectangle($thumb_img, 0, 0, $max_width, $max_height, $thumb_bkg);
          if($CROP){
            if($size[0] < $max_width || $size[1] < $max_height){
              $CROP = false;
            }
            if($width == $max_width && $height == $max_height){
              $CROP = false;
            }
          }
          if($CROP){
            $dst_x = 0;
            $dst_y = 0;
            $dst_w = $max_width;
            $dst_h = $max_height;
            if($width != $max_width){
              $r = $max_width / $size[0];
              $thumb_cut_height = (($size[1] * $r) - $max_height) / 2;
              $img_cut_height = $size[1] * ($thumb_cut_height / $max_height);
              $src_x = 0;
              $src_y = floor($img_cut_height);
              $src_w = $size[0];
              $src_h = floor($size[1] - (2 * $img_cut_height));
            }
            else{
              $r = $max_height / $size[1];
              $thumb_cut_width = (($size[0] * $r) - $max_width) / 2;
              $img_cut_width = $size[0] * ($thumb_cut_width / $max_width);
              $src_x = floor($img_cut_width);
              $src_y = 0;
              $src_w = floor($size[0] - (2 * $img_cut_width));
              $src_h = $size[1];
            }
          }
          else{
            $dst_x = floor(($max_width - $width) / 2);
            $dst_y = floor(($max_height - $height) / 2);
            $src_x = 0;
            $src_y = 0;
            $dst_w = $width;
            $dst_h = $height;
            $src_w = $size[0];
            $src_h = $size[1];
          }
          imagecopyresampled(
            $thumb_img,
            $src_img,
            $dst_x,
            $dst_y,
            $src_x,
            $src_y,
            $dst_w,
            $dst_h,
            $src_w,
            $src_h
          );
          if(isset($quality)) $thumb_img = $thumb_function($thumb_img, $dest, $quality);
          else $thumb_img = $thumb_function($thumb_img, $dest);
          if($thumb_img !== false){
            return array(
              "src" => $src,
              "src_width" => $size[0],
              "src_height" => $size[1],
              "max_width" => $max_width,
              "max_height" => $max_height,
              "thumb_file" => $thumb_file,
              "thumb_width" => $max_width,
              "thumb_height" => $max_height,
              "creation_date" => date("Y-m-d H:i:s")
            );
          }
        }
      }
      return false;
    }

    public function new_thumb_file_name($dest, $file_name, $prefix = "img_"){
      $dest .= strlen($dest) > 0 && substr($dest, -1) != "/" ? "/" : "";
      if(is_dir($dest)){
        $ext = "";
        if(strpos($file_name, ".") !== false){
          $v_ext_path = explode(".", $file_name);
          $ext = ".".$v_ext_path[count($v_ext_path) - 1];
        }
        $i = 0;
        while(file_exists($dest.$prefix.$i.$ext)) $i++;
        return $prefix.$i.$ext;
      }
      return false;
    }

  }