<?php
require_once '../../library/define.php';
require_once '../../library/init_class.php';
require_once '../library/admin_func_class.php';
class process_category_class{
	function process_category(){
		$init=new init_class;
		$shopConfig=$init->getShopConfig();
		$admin_func=new admin_func_class;
		$db=new database_class;
		$admin_func->checkUser();
		$action = isset($_GET['action']) ? $_GET['action'] : '';
		switch ($action) {
		    case 'add' :
		        $this->addCategory();
		        break;
		    case 'modify' :
		        $this->modifyCategory();
		        break;
		    case 'delete' :
		        $this->deleteCategory();
		        break;
		    case 'deleteImage' :
		        $this->deleteImage();
		        break;
		    default :
		        // if action is not defined or unknown
		        // move to main category page
				header ("Cache-Control: no-cache, must-revalidate");
		        header('Location: index.php');
		}
	}
	/*
	    Add a category
	*/
	function addCategory()
	{
		$db=new database_class;
	    $name        = $_POST['txtName'];
		$title=$_POST['Title'];
	    $description = $_POST['mtxDescription'];
	    $image       = $_FILES['fleImage'];
	    $parentId    = $_POST['hidParentId'];   
	    $catImage = $this->uploadImage('fleImage', ABS_CAT_DIR);
	    $sql   = "INSERT INTO ".PREFIX."category (cat_parent_id, cat_name,cat_title, cat_description, cat_image) 
	              VALUES ($parentId, '$name','$title', '$description', '$catImage')";
	    $db->dbQuery($sql) or die('Cannot add category' . mysql_error());
	    header ("Cache-Control: no-cache, must-revalidate");
	    header('Location: index.php?catId=' . $parentId);              
	}
	/*
	    Upload an image and return the uploaded image name 
	*/
	function uploadImage($inputName, $uploadDir)
	{
		$admin_func=new admin_func_class;
	    $image     = $_FILES[$inputName];
	    $imagePath = '';   
	    // if a file is given
	    if (trim($image['tmp_name']) != '') {
	        // get the image extension
	        $ext = substr(strrchr($image['name'], "."), 1); 
	        // generate a random new file name to avoid name conflict
	        $imagePath = md5(rand() * time()) . ".$ext";
			// check the image width. if it exceed the maximum
			// width we must resize it
			$size = getimagesize($image['tmp_name']);
			if ($size[0] > MAX_CATEGORY_IMAGE_WIDTH) {
				$imagePath = $admin_func->createThumbnail($image['tmp_name'], $uploadDir . $imagePath, 	MAX_CATEGORY_IMAGE_WIDTH);
			} else {
				// move the image to category image directory
				// if fail set $imagePath to empty string
				if (!move_uploaded_file($image['tmp_name'], $uploadDir . $imagePath)) {
					$imagePath = '';
				}
			}	
	    }
	    return $imagePath;
	}
	/*
	    Modify a category
	*/
	function modifyCategory()
	{
		$db=new database_class;
	    $catId       = (int)$_GET['catId'];
	    $name        = $_POST['txtName'];
		$title=$_POST['Title'];
	    $description = $_POST['mtxDescription'];
	    $image       = $_FILES['fleImage'];	    
	    $catImage = $this->uploadImage('fleImage', ABS_CAT_DIR);    
	    // if uploading a new image
	    // remove old image
	    if ($catImage != '') {
	        $this->_deleteImage($catId);
			$catImage = "'$catImage'";
	    } else {
			// leave the category image as it was
			$catImage = 'cat_image';
		}    
	    $sql    = "UPDATE ".PREFIX."category 
	               SET cat_name = '$name',cat_title='$title', cat_description = '$description', cat_image = $catImage
	               WHERE cat_id = $catId";           
	    $db->dbQuery($sql) or die('Cannot update category. ' . mysql_error());
		header ("Cache-Control: no-cache, must-revalidate");
	    header('Location: index.php');              
	}
	/*
	    Remove a category
	*/
	function deleteCategory()
	{
		$db=new database_class;
	    if (isset($_GET['catId']) && (int)$_GET['catId'] > 0) {
	        $catId = (int)$_GET['catId'];
	    } else {
			header ("Cache-Control: no-cache, must-revalidate");
	        header('Location: index.php');
	    }   
		// find all the children categories
		$children = $this->getChildren($catId);
		// make an array containing this category and all it's children
		$categories  = array_merge($children, array($catId));
		$numCategory = count($categories);
		// remove all product image & thumbnail 
		// if the product's category is in  $categories
		$sql = "SELECT pd_id, pd_image, pd_thumbnail
		        FROM ".PREFIX."product
				WHERE cat_id IN (" . implode(',', $categories) . ")";
		$result=$db->dbQuery($sql);
		while ($row = $db->dbFetchAssoc($result)) {
			@unlink(ABS_PD_DIR . $row['pd_image']);	
			@unlink(ABS_PD_DIR . $row['pd_thumbnail']);
		}
		// delete the products
		$sql = "DELETE FROM ".PREFIX."product
				WHERE cat_id IN (" . implode(',', $categories) . ")";
		$db->dbQuery($sql);
		// then remove the categories image
		$this->_deleteImage($categories);
	    // finally remove the category from database;
	    $sql = "DELETE FROM ".PREFIX."category 
	            WHERE cat_id IN (" . implode(',', $categories) . ")";
	    $db->dbQuery($sql);
	    header ("Cache-Control: no-cache, must-revalidate");
	    header('Location: index.php');
	}
	/*
		Recursively find all children of $catId
	*/
	function getChildren($catId)
	{
		$db=new database_class;
	    $sql = "SELECT cat_id ".
	           "FROM ".PREFIX."category ".
	           "WHERE cat_parent_id = $catId ";
	    $result=$db->dbQuery($sql);   
		$cat = array();
		if ($db->dbNumRows($result) > 0) {
			while ($row = $db->dbFetchRow($result)) {
				$cat[] = $row[0];
				// call this function again to find the children
				$cat  = array_merge($cat, $this->getChildren($row[0]));
			}
	    }
	    return $cat;
	}
	/*
	    Remove a category image
	*/
	function deleteImage()
	{
		$db=new database_class;
	    if (isset($_GET['catId']) && (int)$_GET['catId'] > 0) {
	        $catId = (int)$_GET['catId'];
	    } else {
			header ("Cache-Control: no-cache, must-revalidate");
	        header('Location: index.php');
	    }   
		$this->_deleteImage($catId);
		// update the image name in the database
		$sql = "UPDATE ".PREFIX."category
				SET cat_image = ''
				WHERE cat_id = $catId";
		$db->dbQuery($sql);        
		header ("Cache-Control: no-cache, must-revalidate");
	    header("Location: index.php?view=modify&catId=$catId");
	}
	/*
		Delete a category image where category = $catId
	*/
	function _deleteImage($catId)
	{
		$db=new database_class;
	    // we will return the status
	    // whether the image deleted successfully
	    $deleted = false;
		// get the image(s)
	    $sql = "SELECT cat_image 
	            FROM ".PREFIX."category
	            WHERE cat_id ";
		if (is_array($catId)) {
			$sql .= " IN (" . implode(',', $catId) . ")";
		} else {
			$sql .= " = $catId";
		}	
	    $result=$db->dbQuery($sql);
	    if ($db->dbNumRows($result)) {
	        while ($row = $db->dbFetchAssoc($result)) {
		        // delete the image file
	    	    $deleted = @unlink(ABS_CAT_DIR . $row['cat_image']);
			}	
	    }
	    return $deleted;
	}
}
$process_category=new process_category_class;
$process_category->process_category();
?>