Add Image, Upload, UploadHelper.

Image.class.php

@@ -0,0 +1,98 @@
+<?php
+
+class Image
+{
+    public $width;
+    public $height;
+    public $type;
+    public $size;
+    public $filename;
+    public $original_filename;
+    public $path;
+    public $variants = array();
+
+    private $_is_empty = true;
+
+    const SIZE_100_80 = '100x80';
+    const SIZE_200_160 = '200x160';
+    const SIZE_300_240 = '300x240';
+    const SIZE_550_440 = '550x440';
+    const SIZE_SKI = '1000x';
+
+    public static $sizes = array(
+        self::SIZE_100_80,
+        self::SIZE_200_160,
+        self::SIZE_300_240,
+        self::SIZE_550_440
+    );
+
+    /**
+     * @param array|string $data
+     * @return Image
+     * @throws ErrorException
+     */
+    public static function getInstance($data)
+    {
+        $instance = new self($data);
+        if (is_null($data)) {
+            throw new ErrorException('Empty data for Image::getInstance().');
+        }
+        if (!is_array($data)) {
+            $data = json_decode($data, true);
+            if (json_last_error() != JSON_ERROR_NONE) {
+                throw new ErrorException('Unable to convert json-string to array.');
+            }
+        }
+        foreach ($data as $attribute_name => $attribute_value) {
+            if (property_exists(__CLASS__, $attribute_name)) {
+                $instance->{$attribute_name} = $attribute_value;
+            }
+        }
+        $instance->_is_empty = false;
+        return $instance;
+    }
+
+    /**
+     * @return string
+     */
+    public function getWebName()
+    {
+        return $this->path . '/' . $this->filename;
+    }
+
+    /**
+     * @param $size string
+     * @return Image
+     */
+    public function getVariant($size)
+    {
+        if (!array_key_exists($size, $this->variants)) {
+            $this->variants[$size] = new Image;
+        } else {
+            if (!is_object($this->variants[$size])) {
+                $this->variants[$size] = self::getInstance($this->variants[$size]);
+            }
+        }
+        return $this->variants[$size];
+
+    }
+
+    public function getIsEmpty()
+    {
+        return (bool) $this->_is_empty;
+    }
+
+    public function setIsNotEmpty()
+    {
+        $this->_is_empty = false;
+    }
+
+    public function __toString()
+    {
+        $data = array();
+        foreach ($this as $attribute_name => $attribute_value) {
+            $data[$attribute_name] = $attribute_value;
+        }
+        return json_encode($data);
+    }
+}