<?php
/* Copyright (C) 2015   Jean-François Ferry     <jfefe@aternatik.fr>
 * Copyright (C) 2019   Cedric Ancelin          <icedo.anc@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

use Luracast\Restler\RestException;

require_once DOL_DOCUMENT_ROOT.'/product/class/product.class.php';
require_once DOL_DOCUMENT_ROOT.'/fourn/class/fournisseur.product.class.php';
require_once DOL_DOCUMENT_ROOT.'/categories/class/categorie.class.php';
require_once DOL_DOCUMENT_ROOT.'/variants/class/ProductAttribute.class.php';
require_once DOL_DOCUMENT_ROOT.'/variants/class/ProductAttributeValue.class.php';
require_once DOL_DOCUMENT_ROOT.'/variants/class/ProductCombination.class.php';
require_once DOL_DOCUMENT_ROOT.'/variants/class/ProductCombination2ValuePair.class.php';

/**
 * API class for products
 *
 * @access protected
 * @class  DolibarrApiAccess {@requires user,external}
 */
class Products extends DolibarrApi
{
	/**
	 * @var array   $FIELDS     Mandatory fields, checked when create and update object
	 */
	public static $FIELDS = array(
		'ref',
		'label'
	);

	/**
	 * @var Product $product {@type Product}
	 */
	public $product;

	/**
	 * @var ProductFournisseur $productsupplier {@type ProductFournisseur}
	 */
	public $productsupplier;

	/**
	 * Constructor
	 */
	public function __construct()
	{
		global $db, $conf;

		$this->db = $db;
		$this->product = new Product($this->db);
		$this->productsupplier = new ProductFournisseur($this->db);
	}

	/**
	 * Get properties of a product object by id
	 *
	 * Return an array with product information.
	 *
	 * @param  int    $id                  ID of product
	 * @param  int    $includestockdata    Load also information about stock (slower)
	 * @param  bool   $includesubproducts  Load information about subproducts
	 * @param  bool   $includeparentid     Load also ID of parent product (if product is a variant of a parent product)
	 * @param  bool   $includetrans		   Load also the translations of product label and description
	 * @return array|mixed                 Data without useless information
	 *
	 * @throws RestException 401
	 * @throws RestException 403
	 * @throws RestException 404
	 */
	public function get($id, $includestockdata = 0, $includesubproducts = false, $includeparentid = false, $includetrans = false)
	{
		return $this->_fetch($id, '', '', '', $includestockdata, $includesubproducts, $includeparentid, false, $includetrans);
	}

	/**
	 * Get properties of a product object by ref
	 *
	 * Return an array with product information.
	 *
	 * @param  string $ref                Ref of element
	 * @param  int    $includestockdata   Load also information about stock (slower)
	 * @param  bool   $includesubproducts Load information about subproducts
	 * @param  bool   $includeparentid    Load also ID of parent product (if product is a variant of a parent product)
	 * @param  bool   $includetrans		  Load also the translations of product label and description
	 *
	 * @return array|mixed                 Data without useless information
	 *
	 * @url GET ref/{ref}
	 *
	 * @throws RestException 401
	 * @throws RestException 403
	 * @throws RestException 404
	 */
	public function getByRef($ref, $includestockdata = 0, $includesubproducts = false, $includeparentid = false, $includetrans = false)
	{
		return $this->_fetch('', $ref, '', '', $includestockdata, $includesubproducts, $includeparentid, false, $includetrans);
	}

	/**
	 * Get properties of a product object by ref_ext
	 *
	 * Return an array with product information.
	 *
	 * @param  string $ref_ext            Ref_ext of element
	 * @param  int    $includestockdata   Load also information about stock (slower)
	 * @param  bool   $includesubproducts Load information about subproducts
	 * @param  bool   $includeparentid    Load also ID of parent product (if product is a variant of a parent product)
	 * @param  bool   $includetrans		  Load also the translations of product label and description
	 *
	 * @return array|mixed Data without useless information
	 *
	 * @url GET ref_ext/{ref_ext}
	 *
	 * @throws RestException 401
	 * @throws RestException 403
	 * @throws RestException 404
	 */
	public function getByRefExt($ref_ext, $includestockdata = 0, $includesubproducts = false, $includeparentid = false, $includetrans = false)
	{
		return $this->_fetch('', '', $ref_ext, '', $includestockdata, $includesubproducts, $includeparentid, false, $includetrans);
	}

	/**
	 * Get properties of a product object by barcode
	 *
	 * Return an array with product information.
	 *
	 * @param  string $barcode            Barcode of element
	 * @param  int    $includestockdata   Load also information about stock (slower)
	 * @param  bool   $includesubproducts Load information about subproducts
	 * @param  bool   $includeparentid    Load also ID of parent product (if product is a variant of a parent product)
	 * @param  bool   $includetrans		  Load also the translations of product label and description
	 *
	 * @return array|mixed Data without useless information
	 *
	 * @url GET barcode/{barcode}
	 *
	 * @throws RestException 401
	 * @throws RestException 403
	 * @throws RestException 404
	 */
	public function getByBarcode($barcode, $includestockdata = 0, $includesubproducts = false, $includeparentid = false, $includetrans = false)
	{
		return $this->_fetch('', '', '', $barcode, $includestockdata, $includesubproducts, $includeparentid, false, $includetrans);
	}

	/**
	 * List products
	 *
	 * Get a list of products
	 *
	 * @param  string $sortfield  			Sort field
	 * @param  string $sortorder  			Sort order
	 * @param  int    $limit      			Limit for list
	 * @param  int    $page       			Page number
	 * @param  int    $mode       			Use this param to filter list (0 for all, 1 for only product, 2 for only service)
	 * @param  int    $category   			Use this param to filter list by category
	 * @param  string $sqlfilters 			Other criteria to filter answers separated by a comma. Syntax example "(t.tobuy:=:0) and (t.tosell:=:1)"
	 * @param  bool   $ids_only   			Return only IDs of product instead of all properties (faster, above all if list is long)
	 * @param  int    $variant_filter   	Use this param to filter list (0 = all, 1=products without variants, 2=parent of variants, 3=variants only)
	 * @param  bool   $pagination_data   	If this parameter is set to true the response will include pagination data. Default value is false. Page starts from 0
	 * @param  int    $includestockdata		Load also information about stock (slower)
	 * @return array                		Array of product objects
	 */
	public function index($sortfield = "t.ref", $sortorder = 'ASC', $limit = 100, $page = 0, $mode = 0, $category = 0, $sqlfilters = '', $ids_only = false, $variant_filter = 0, $pagination_data = false, $includestockdata = 0)
	{
		global $db, $conf;

		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(403);
		}

		$obj_ret = array();

		$socid = DolibarrApiAccess::$user->socid ? DolibarrApiAccess::$user->socid : '';

		$sql = "SELECT t.rowid, t.ref, t.ref_ext";
		$sql .= " FROM ".$this->db->prefix()."product as t";
		$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."product_extrafields AS ef ON ef.fk_object = t.rowid";	// So we will be able to filter on extrafields
		if ($category > 0) {
			$sql .= ", ".$this->db->prefix()."categorie_product as c";
		}
		$sql .= ' WHERE t.entity IN ('.getEntity('product').')';

		if ($variant_filter == 1) {
			$sql .= ' AND t.rowid not in (select distinct fk_product_parent from '.$this->db->prefix().'product_attribute_combination)';
			$sql .= ' AND t.rowid not in (select distinct fk_product_child from '.$this->db->prefix().'product_attribute_combination)';
		}
		if ($variant_filter == 2) {
			$sql .= ' AND t.rowid in (select distinct fk_product_parent from '.$this->db->prefix().'product_attribute_combination)';
		}
		if ($variant_filter == 3) {
			$sql .= ' AND t.rowid in (select distinct fk_product_child from '.$this->db->prefix().'product_attribute_combination)';
		}

		// Select products of given category
		if ($category > 0) {
			$sql .= " AND c.fk_categorie = ".((int) $category);
			$sql .= " AND c.fk_product = t.rowid";
		}
		if ($mode == 1) {
			// Show only products
			$sql .= " AND t.fk_product_type = 0";
		} elseif ($mode == 2) {
			// Show only services
			$sql .= " AND t.fk_product_type = 1";
		}

		// Add sql filters
		if ($sqlfilters) {
			$errormessage = '';
			$sql .= forgeSQLFromUniversalSearchCriteria($sqlfilters, $errormessage);
			if ($errormessage) {
				throw new RestException(400, 'Error when validating parameter sqlfilters -> '.$errormessage);
			}
		}

		//this query will return total products with the filters given
		$sqlTotals =  str_replace('SELECT t.rowid, t.ref, t.ref_ext', 'SELECT count(t.rowid) as total', $sql);

		$sql .= $this->db->order($sortfield, $sortorder);
		if ($limit) {
			if ($page < 0) {
				$page = 0;
			}
			$offset = $limit * $page;

			$sql .= $this->db->plimit($limit + 1, $offset);
		}

		$result = $this->db->query($sql);
		if ($result) {
			$num = $this->db->num_rows($result);
			$min = min($num, ($limit <= 0 ? $num : $limit));
			$i = 0;
			while ($i < $min) {
				$obj = $this->db->fetch_object($result);
				if (!$ids_only) {
					$product_static = new Product($this->db);
					if ($product_static->fetch($obj->rowid)) {
						if (!empty($includestockdata) && DolibarrApiAccess::$user->rights->stock->lire) {
							$product_static->load_stock();

							if (is_array($product_static->stock_warehouse)) {
								foreach ($product_static->stock_warehouse as $keytmp => $valtmp) {
									if (isset($product_static->stock_warehouse[$keytmp]->detail_batch) && is_array($product_static->stock_warehouse[$keytmp]->detail_batch)) {
										foreach ($product_static->stock_warehouse[$keytmp]->detail_batch as $keytmp2 => $valtmp2) {
											unset($product_static->stock_warehouse[$keytmp]->detail_batch[$keytmp2]->db);
										}
									}
								}
							}
						}


						$obj_ret[] = $this->_cleanObjectDatas($product_static);
					}
				} else {
					$obj_ret[] = $obj->rowid;
				}
				$i++;
			}
		} else {
			throw new RestException(503, 'Error when retrieve product list : '.$this->db->lasterror());
		}
		if (!count($obj_ret)) {
			throw new RestException(404, 'No product found');
		}

		//if $pagination_data is true the response will contain element data with all values and element pagination with pagination data(total,page,limit)
		if ($pagination_data) {
			$totalsResult = $this->db->query($sqlTotals);
			$total = $this->db->fetch_object($totalsResult)->total;

			$tmp = $obj_ret;
			$obj_ret = array();

			$obj_ret['data'] = $tmp;
			$obj_ret['pagination'] = array(
				'total' => (int) $total,
				'page' => $page, //count starts from 0
				'page_count' => ceil((int) $total/$limit),
				'limit' => $limit
			);
		}

		return $obj_ret;
	}

	/**
	 * Create product object
	 *
	 * @param  array $request_data Request data
	 * @return int     ID of product
	 */
	public function post($request_data = null)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}
		// Check mandatory fields
		$result = $this->_validate($request_data);

		foreach ($request_data as $field => $value) {
			$this->product->$field = $value;
		}
		if ($this->product->create(DolibarrApiAccess::$user) < 0) {
			throw new RestException(500, "Error creating product", array_merge(array($this->product->error), $this->product->errors));
		}

		return $this->product->id;
	}

	/**
	 * Update product.
	 * Price will be updated by this API only if option is set on "One price per product". See other APIs for other price modes.
	 *
	 * @param  int   $id           Id of product to update
	 * @param  array $request_data Datas
	 * @return int
	 *
	 * @throws RestException 401
	 * @throws RestException 404
	 */
	public function put($id, $request_data = null)
	{
		global $conf;

		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		$result = $this->product->fetch($id);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if (!DolibarrApi::_checkAccessToResource('product', $this->product->id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$oldproduct = dol_clone($this->product);

		foreach ($request_data as $field => $value) {
			if ($field == 'id') {
				continue;
			}
			if ($field == 'stock_reel') {
				throw new RestException(400, 'Stock reel cannot be updated here. Use the /stockmovements endpoint instead');
			}
			$this->product->$field = $value;
		}

		$updatetype = false;
		if ($this->product->type != $oldproduct->type && ($this->product->isProduct() || $this->product->isService())) {
			$updatetype = true;
		}

		$result = $this->product->update($id, DolibarrApiAccess::$user, 1, 'update', $updatetype);

		// If price mode is 1 price per product
		if ($result > 0 && !empty($conf->global->PRODUCT_PRICE_UNIQ)) {
			// We update price only if it was changed
			$pricemodified = false;
			if ($this->product->price_base_type != $oldproduct->price_base_type) {
				$pricemodified = true;
			} else {
				if ($this->product->tva_tx != $oldproduct->tva_tx) {
					$pricemodified = true;
				}
				if ($this->product->tva_npr != $oldproduct->tva_npr) {
					$pricemodified = true;
				}
				if ($this->product->default_vat_code != $oldproduct->default_vat_code) {
					$pricemodified = true;
				}

				if ($this->product->price_base_type == 'TTC') {
					if ($this->product->price_ttc != $oldproduct->price_ttc) {
						$pricemodified = true;
					}
					if ($this->product->price_min_ttc != $oldproduct->price_min_ttc) {
						$pricemodified = true;
					}
				} else {
					if ($this->product->price != $oldproduct->price) {
						$pricemodified = true;
					}
					if ($this->product->price_min != $oldproduct->price_min) {
						$pricemodified = true;
					}
				}
			}

			if ($pricemodified) {
				$newvat = $this->product->tva_tx;
				$newnpr = $this->product->tva_npr;
				$newvatsrccode = $this->product->default_vat_code;

				$newprice = $this->product->price;
				$newpricemin = $this->product->price_min;
				if ($this->product->price_base_type == 'TTC') {
					$newprice = $this->product->price_ttc;
					$newpricemin = $this->product->price_min_ttc;
				}

				$result = $this->product->updatePrice($newprice, $this->product->price_base_type, DolibarrApiAccess::$user, $newvat, $newpricemin, 0, $newnpr, 0, 0, array(), $newvatsrccode);
			}
		}

		if ($result <= 0) {
			throw new RestException(500, "Error updating product", array_merge(array($this->product->error), $this->product->errors));
		}

		return $this->get($id);
	}

	/**
	 * Delete product
	 *
	 * @param  int 		$id 		Product ID
	 * @return array
	 */
	public function delete($id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->supprimer) {
			throw new RestException(401);
		}
		$result = $this->product->fetch($id);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if (!DolibarrApi::_checkAccessToResource('product', $this->product->id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		// The Product::delete() method uses the global variable $user.
		global $user;
		$user = DolibarrApiAccess::$user;

		$res = $this->product->delete(DolibarrApiAccess::$user);
		if ($res < 0) {
			throw new RestException(500, "Can't delete, error occurs");
		} elseif ($res == 0) {
			throw new RestException(409, "Can't delete, that product is probably used");
		}

		return array(
			'success' => array(
				'code' => 200,
				'message' => 'Object deleted'
			)
		);
	}

	/**
	 * Get the list of subproducts of the product.
	 *
	 * @param  int $id      Id of parent product/service
	 * @return array
	 *
	 * @throws RestException
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url GET {id}/subproducts
	 */
	public function getSubproducts($id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		if (!DolibarrApi::_checkAccessToResource('product', $id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$childsArbo = $this->product->getChildsArbo($id, 1);

		$keys = array('rowid', 'qty', 'fk_product_type', 'label', 'incdec', 'ref', 'fk_association', 'rang');
		$childs = array();
		foreach ($childsArbo as $values) {
			$childs[] = array_combine($keys, $values);
		}

		return $childs;
	}

	/**
	 * Add subproduct.
	 *
	 * Link a product/service to a parent product/service
	 *
	 * @param  int $id            Id of parent product/service
	 * @param  int $subproduct_id Id of child product/service
	 * @param  int $qty           Quantity
	 * @param  int $incdec        1=Increase/decrease stock of child when parent stock increase/decrease
	 * @return int
	 *
	 * @throws RestException
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url POST {id}/subproducts/add
	 */
	public function addSubproducts($id, $subproduct_id, $qty, $incdec = 1)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		if (!DolibarrApi::_checkAccessToResource('product', $id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$result = $this->product->add_sousproduit($id, $subproduct_id, $qty, $incdec);
		if ($result <= 0) {
			throw new RestException(500, "Error adding product child");
		}
		return $result;
	}

	/**
	 * Remove subproduct.
	 * Unlink a product/service from a parent product/service
	 *
	 * @param  int $id             Id of parent product/service
	 * @param  int $subproduct_id  Id of child product/service
	 * @return int
	 *
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url DELETE {id}/subproducts/remove/{subproduct_id}
	 */
	public function delSubproducts($id, $subproduct_id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		if (!DolibarrApi::_checkAccessToResource('product', $id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$result = $this->product->del_sousproduit($id, $subproduct_id);
		if ($result <= 0) {
			throw new RestException(500, "Error while removing product child");
		}
		return $result;
	}


	/**
	 * Get categories for a product
	 *
	 * @param int    $id        ID of product
	 * @param string $sortfield Sort field
	 * @param string $sortorder Sort order
	 * @param int    $limit     Limit for list
	 * @param int    $page      Page number
	 *
	 * @return mixed
	 *
	 * @url GET {id}/categories
	 */
	public function getCategories($id, $sortfield = "s.rowid", $sortorder = 'ASC', $limit = 0, $page = 0)
	{
		if (!DolibarrApiAccess::$user->rights->categorie->lire) {
			throw new RestException(401);
		}

		$categories = new Categorie($this->db);

		$result = $categories->getListForItem($id, 'product', $sortfield, $sortorder, $limit, $page);

		if (empty($result)) {
			throw new RestException(404, 'No category found');
		}

		if ($result < 0) {
			throw new RestException(503, 'Error when retrieve category list : '.join(',', array_merge(array($categories->error), $categories->errors)));
		}

		return $result;
	}

	/**
	 * Get prices per segment for a product
	 *
	 * @param int $id ID of product
	 *
	 * @return mixed
	 *
	 * @url GET {id}/selling_multiprices/per_segment
	 */
	public function getCustomerPricesPerSegment($id)
	{
		global $conf;

		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		if (empty($conf->global->PRODUIT_MULTIPRICES)) {
			throw new RestException(400, 'API not available: this mode of pricing is not enabled by setup');
		}

		$result = $this->product->fetch($id);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if ($result < 0) {
			throw new RestException(503, 'Error when retrieve prices list : '.join(',', array_merge(array($this->product->error), $this->product->errors)));
		}

		return array(
			'multiprices'=>$this->product->multiprices,
			'multiprices_inc_tax'=>$this->product->multiprices_ttc,
			'multiprices_min'=>$this->product->multiprices_min,
			'multiprices_min_inc_tax'=>$this->product->multiprices_min_ttc,
			'multiprices_vat'=>$this->product->multiprices_tva_tx,
			'multiprices_base_type'=>$this->product->multiprices_base_type,
			//'multiprices_default_vat_code'=>$this->product->multiprices_default_vat_code
		);
	}

	/**
	 * Get prices per customer for a product
	 *
	 * @param int 		$id 				ID of product
	 * @param string   	$thirdparty_id	  	Thirdparty id to filter orders of (example '1') {@pattern /^[0-9,]*$/i}
	 *
	 * @return mixed
	 *
	 * @url GET {id}/selling_multiprices/per_customer
	 */
	public function getCustomerPricesPerCustomer($id, $thirdparty_id = '')
	{
		global $conf;

		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		if (empty($conf->global->PRODUIT_CUSTOMER_PRICES)) {
			throw new RestException(400, 'API not available: this mode of pricing is not enabled by setup');
		}

		$socid = DolibarrApiAccess::$user->socid ? DolibarrApiAccess::$user->socid : '';
		if ($socid > 0 && $socid != $thirdparty_id) {
			throw new RestException(401, 'Getting prices for all customers or for the customer ID '.$thirdparty_id.' is not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$result = $this->product->fetch($id);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if ($result > 0) {
			require_once DOL_DOCUMENT_ROOT.'/product/class/productcustomerprice.class.php';
			$prodcustprice = new Productcustomerprice($this->db);
			$filter = array();
			$filter['t.fk_product'] .= $id;
			if ($thirdparty_id) {
				$filter['t.fk_soc'] .= $thirdparty_id;
			}
			$result = $prodcustprice->fetchAll('', '', 0, 0, $filter);
		}

		if (empty($prodcustprice->lines)) {
			throw new RestException(404, 'Prices not found');
		}

		return $prodcustprice->lines;
	}

	/**
	 * Get prices per quantity for a product
	 *
	 * @param int $id ID of product
	 *
	 * @return mixed
	 *
	 * @url GET {id}/selling_multiprices/per_quantity
	 */
	public function getCustomerPricesPerQuantity($id)
	{
		global $conf;

		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		if (empty($conf->global->PRODUIT_CUSTOMER_PRICES_BY_QTY)) {
			throw new RestException(400, 'API not available: this mode of pricing is not enabled by setup');
		}

		$result = $this->product->fetch($id);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if ($result < 0) {
			throw new RestException(503, 'Error when retrieve prices list : '.join(',', array_merge(array($this->product->error), $this->product->errors)));
		}

		return array(
			'prices_by_qty'=>$this->product->prices_by_qty[0], // 1 if price by quantity was activated for the product
			'prices_by_qty_list'=>$this->product->prices_by_qty_list[0]
		);
	}

	/**
	 * Add/Update purchase prices for a product.
	 *
	 * @param   int         $id                             ID of Product
	 * @param  	float		$qty				            Min quantity for which price is valid
	 * @param  	float		$buyprice			            Purchase price for the quantity min
	 * @param  	string		$price_base_type	            HT or TTC
	 * @param  	int		    $fourn_id                       Supplier ID
	 * @param  	int			$availability		            Product availability
	 * @param	string		$ref_fourn			            Supplier ref
	 * @param	float		$tva_tx				            New VAT Rate (For example 8.5. Should not be a string)
	 * @param  	string		$charges			            costs affering to product
	 * @param  	float		$remise_percent		            Discount  regarding qty (percent)
	 * @param  	float		$remise				            Discount  regarding qty (amount)
	 * @param  	int			$newnpr				            Set NPR or not
	 * @param	int			$delivery_time_days	            Delay in days for delivery (max). May be '' if not defined.
	 * @param   string      $supplier_reputation            Reputation with this product to the defined supplier (empty, FAVORITE, DONOTORDER)
	 * @param   array		$localtaxes_array	            Array with localtaxes info array('0'=>type1,'1'=>rate1,'2'=>type2,'3'=>rate2) (loaded by getLocalTaxesFromRate(vatrate, 0, ...) function).
	 * @param   string  	$newdefaultvatcode              Default vat code
	 * @param  	float		$multicurrency_buyprice 	    Purchase price for the quantity min in currency
	 * @param  	string		$multicurrency_price_base_type	HT or TTC in currency
	 * @param  	float		$multicurrency_tx	            Rate currency
	 * @param  	string		$multicurrency_code	            Currency code
	 * @param  	string		$desc_fourn     	            Custom description for product_fourn_price
	 * @param  	string		$barcode     	                Barcode
	 * @param  	int		    $fk_barcode_type     	        Barcode type
	 * @return int
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url POST {id}/purchase_prices
	 */
	public function addPurchasePrice($id, $qty, $buyprice, $price_base_type, $fourn_id, $availability, $ref_fourn, $tva_tx, $charges = 0, $remise_percent = 0, $remise = 0, $newnpr = 0, $delivery_time_days = 0, $supplier_reputation = '', $localtaxes_array = array(), $newdefaultvatcode = '', $multicurrency_buyprice = 0, $multicurrency_price_base_type = 'HT', $multicurrency_tx = 1, $multicurrency_code = '', $desc_fourn = '', $barcode = '', $fk_barcode_type = null)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		$result = $this->productsupplier->fetch($id);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if (!DolibarrApi::_checkAccessToResource('product', $this->productsupplier->id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$socid = DolibarrApiAccess::$user->socid ? DolibarrApiAccess::$user->socid : '';
		if ($socid > 0 && $socid != $fourn_id) {
			throw new RestException(401, 'Adding purchase price for the supplier ID '.$fourn_id.' is not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$result = $this->productsupplier->add_fournisseur(DolibarrApiAccess::$user, $fourn_id, $ref_fourn, $qty);
		if ($result < 0) {
			throw new RestException(500, "Error adding supplier to product : ".$this->db->lasterror());
		}

		$fourn = new Fournisseur($this->db);
		$result = $fourn->fetch($fourn_id);
		if ($result <= 0) {
			throw new RestException(404, 'Supplier not found');
		}

		// Clean data
		$ref_fourn = sanitizeVal($ref_fourn, 'alphanohtml');
		$desc_fourn = sanitizeVal($desc_fourn, 'restricthtml');
		$barcode = sanitizeVal($barcode, 'alphanohtml');

		$result = $this->productsupplier->update_buyprice($qty, $buyprice, DolibarrApiAccess::$user, $price_base_type, $fourn, $availability, $ref_fourn, $tva_tx, $charges, $remise_percent, $remise, $newnpr, $delivery_time_days, $supplier_reputation, $localtaxes_array, $newdefaultvatcode, $multicurrency_buyprice, $multicurrency_price_base_type, $multicurrency_tx, $multicurrency_code, $desc_fourn, $barcode, $fk_barcode_type);

		if ($result <= 0) {
			throw new RestException(500, "Error updating buy price : ".$this->db->lasterror());
		}
		return (int) $this->productsupplier->product_fourn_price_id;
	}

	/**
	 * Delete purchase price for a product
	 *
	 * @param  int $id Product ID
	 * @param  int $priceid purchase price ID
	 *
	 * @url DELETE {id}/purchase_prices/{priceid}
	 *
	 * @return int
	 *
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 */
	public function deletePurchasePrice($id, $priceid)
	{
		if (!DolibarrApiAccess::$user->rights->produit->supprimer) {
			throw new RestException(401);
		}
		$result = $this->productsupplier->fetch($id);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if (!DolibarrApi::_checkAccessToResource('product', $this->productsupplier->id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$resultsupplier = 0;
		if ($result > 0) {
			$resultsupplier = $this->productsupplier->remove_product_fournisseur_price($priceid);
		}

		return $resultsupplier;
	}

	/**
	 * Get a list of all purchase prices of products
	 *
	 * @param  string $sortfield  Sort field
	 * @param  string $sortorder  Sort order
	 * @param  int    $limit      Limit for list
	 * @param  int    $page       Page number
	 * @param  int    $mode       Use this param to filter list (0 for all, 1 for only product, 2 for only service)
	 * @param  int    $category   Use this param to filter list by category of product
	 * @param  int    $supplier   Use this param to filter list by supplier
	 * @param  string $sqlfilters Other criteria to filter answers separated by a comma. Syntax example "(t.tobuy:=:0) and (t.tosell:=:1)"
	 * @return array              Array of product objects
	 *
	 * @url GET purchase_prices
	 */
	public function getSupplierProducts($sortfield = "t.ref", $sortorder = 'ASC', $limit = 100, $page = 0, $mode = 0, $category = 0, $supplier = 0, $sqlfilters = '')
	{
		global $db, $conf;

		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$obj_ret = array();

		// Force id of company for external users
		$socid = DolibarrApiAccess::$user->socid ? DolibarrApiAccess::$user->socid : '';
		if ($socid > 0) {
			if ($supplier != $socid || empty($supplier)) {
				throw new RestException(401, 'As an external user, you can request only for your supplier id = '.$socid);
			}
		}

		$sql = "SELECT t.rowid, t.ref, t.ref_ext";
		$sql .= " FROM ".$this->db->prefix()."product as t";
		if ($category > 0) {
			$sql .= ", ".$this->db->prefix()."categorie_product as c";
		}
		$sql .= ", ".$this->db->prefix()."product_fournisseur_price as s";

		$sql .= ' WHERE t.entity IN ('.getEntity('product').')';

		if ($supplier > 0) {
			$sql .= " AND s.fk_soc = ".((int) $supplier);
		}
		if ($socid > 0) {	// if external user
			$sql .= " AND s.fk_soc = ".((int) $socid);
		}
		$sql .= " AND s.fk_product = t.rowid";
		// Select products of given category
		if ($category > 0) {
			$sql .= " AND c.fk_categorie = ".((int) $category);
			$sql .= " AND c.fk_product = t.rowid";
		}
		if ($mode == 1) {
			// Show only products
			$sql .= " AND t.fk_product_type = 0";
		} elseif ($mode == 2) {
			// Show only services
			$sql .= " AND t.fk_product_type = 1";
		}
		// Add sql filters
		if ($sqlfilters) {
			$errormessage = '';
			$sql .= forgeSQLFromUniversalSearchCriteria($sqlfilters, $errormessage);
			if ($errormessage) {
				throw new RestException(400, 'Error when validating parameter sqlfilters -> '.$errormessage);
			}
		}

		$sql .= $this->db->order($sortfield, $sortorder);
		if ($limit) {
			if ($page < 0) {
				$page = 0;
			}
			$offset = $limit * $page;
			$sql .= $this->db->plimit($limit + 1, $offset);
		}
		$result = $this->db->query($sql);
		if ($result) {
			$num = $this->db->num_rows($result);
			$min = min($num, ($limit <= 0 ? $num : $limit));
			$i = 0;
			while ($i < $min) {
				$obj = $this->db->fetch_object($result);

				$product_fourn = new ProductFournisseur($this->db);
				$product_fourn_list = $product_fourn->list_product_fournisseur_price($obj->rowid, '', '', 0, 0);
				foreach ($product_fourn_list as $tmpobj) {
					$this->_cleanObjectDatas($tmpobj);
				}

				//var_dump($product_fourn_list->db);exit;
				$obj_ret[$obj->rowid] = $product_fourn_list;

				$i++;
			}
		} else {
			throw new RestException(503, 'Error when retrieve product list : '.$this->db->lasterror());
		}
		if (!count($obj_ret)) {
			throw new RestException(404, 'No product found');
		}
		return $obj_ret;
	}

	/**
	 * Get purchase prices for a product
	 *
	 * Return an array with product information.
	 * TODO implement getting a product by ref or by $ref_ext
	 *
	 * @param  int    $id               ID of product
	 * @param  string $ref              Ref of element
	 * @param  string $ref_ext          Ref ext of element
	 * @param  string $barcode          Barcode of element
	 * @return array|mixed              Data without useless information
	 *
	 * @url GET {id}/purchase_prices
	 *
	 * @throws RestException 401
	 * @throws RestException 403
	 * @throws RestException 404
	 *
	 */
	public function getPurchasePrices($id, $ref = '', $ref_ext = '', $barcode = '')
	{
		if (empty($id) && empty($ref) && empty($ref_ext) && empty($barcode)) {
			throw new RestException(400, 'bad value for parameter id, ref, ref_ext or barcode');
		}

		$id = (empty($id) ? 0 : $id);

		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(403);
		}

		$socid = DolibarrApiAccess::$user->socid ? DolibarrApiAccess::$user->socid : '';

		$result = $this->product->fetch($id, $ref, $ref_ext, $barcode);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if (!DolibarrApi::_checkAccessToResource('product', $this->product->id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$product_fourn_list = array();

		if ($result) {
			$product_fourn = new ProductFournisseur($this->db);
			$product_fourn_list = $product_fourn->list_product_fournisseur_price($this->product->id, '', '', 0, 0, ($socid > 0 ? $socid : 0));
		}

		foreach ($product_fourn_list as $tmpobj) {
			$this->_cleanObjectDatas($tmpobj);
		}

		return $this->_cleanObjectDatas($product_fourn_list);
	}

	/**
	 * Get attributes.
	 *
	 * @param  string $sortfield  Sort field
	 * @param  string $sortorder  Sort order
	 * @param  int    $limit      Limit for list
	 * @param  int    $page       Page number
	 * @param  string $sqlfilters Other criteria to filter answers separated by a comma. Syntax example "(t.ref:like:color)"
	 * @return array
	 *
	 * @throws RestException 401
	 * @throws RestException 404
	 * @throws RestException 503
	 *
	 * @url GET attributes
	 */
	public function getAttributes($sortfield = "t.ref", $sortorder = 'ASC', $limit = 100, $page = 0, $sqlfilters = '')
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$sql = "SELECT t.rowid, t.ref, t.ref_ext, t.label, t.position, t.entity";
		$sql .= " FROM ".$this->db->prefix()."product_attribute as t";
		$sql .= ' WHERE t.entity IN ('.getEntity('product').')';

		// Add sql filters
		if ($sqlfilters) {
			$errormessage = '';
			$sql .= forgeSQLFromUniversalSearchCriteria($sqlfilters, $errormessage);
			if ($errormessage) {
				throw new RestException(400, 'Error when validating parameter sqlfilters -> '.$errormessage);
			}
		}

		$sql .= $this->db->order($sortfield, $sortorder);
		if ($limit) {
			if ($page < 0) {
				$page = 0;
			}
			$offset = $limit * $page;

			$sql .= $this->db->plimit($limit, $offset);
		}

		$result = $this->db->query($sql);

		if (!$result) {
			throw new RestException(503, 'Error when retrieve product attribute list : '.$this->db->lasterror());
		}

		$return = array();
		while ($result = $this->db->fetch_object($query)) {
			$tmp = new ProductAttribute($this->db);
			$tmp->id = $result->rowid;
			$tmp->ref = $result->ref;
			$tmp->ref_ext = $result->ref_ext;
			$tmp->label = $result->label;
			$tmp->position = $result->position;
			$tmp->entity = $result->entity;

			$return[] = $this->_cleanObjectDatas($tmp);
		}

		if (!count($return)) {
			throw new RestException(404, 'No product attribute found');
		}

		return $return;
	}

	/**
	 * Get attribute by ID.
	 *
	 * @param  int $id ID of Attribute
	 * @return array
	 *
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url GET attributes/{id}
	 */
	public function getAttributeById($id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$prodattr = new ProductAttribute($this->db);
		$result = $prodattr->fetch((int) $id);

		if ($result < 0) {
			throw new RestException(404, "Product attribute not found");
		}

		$fields = ["id", "ref", "ref_ext", "label", "position", "entity"];

		foreach ($prodattr as $field => $value) {
			if (!in_array($field, $fields)) {
				unset($prodattr->{$field});
			}
		}

		$sql = "SELECT COUNT(*) as nb FROM ".$this->db->prefix()."product_attribute_combination2val as pac2v";
		$sql .= " JOIN ".$this->db->prefix()."product_attribute_combination as pac ON pac2v.fk_prod_combination = pac.rowid";
		$sql .= " WHERE pac2v.fk_prod_attr = ".((int) $prodattr->id)." AND pac.entity IN (".getEntity('product').")";

		$resql = $this->db->query($sql);
		$obj = $this->db->fetch_object($resql);
		$prodattr->is_used_by_products = (int) $obj->nb;

		return $prodattr;
	}

	/**
	 * Get attributes by ref.
	 *
	 * @param  string $ref Reference of Attribute
	 * @return array
	 *
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url GET attributes/ref/{ref}
	 */
	public function getAttributesByRef($ref)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$ref = trim($ref);

		$sql = "SELECT rowid, ref, ref_ext, label, position, entity FROM ".$this->db->prefix()."product_attribute WHERE ref LIKE '".$this->db->escape($ref)."' AND entity IN (".getEntity('product').")";

		$query = $this->db->query($sql);

		if (!$this->db->num_rows($query)) {
			throw new RestException(404);
		}

		$result = $this->db->fetch_object($query);

		$attr = array();
		$attr['id'] = $result->rowid;
		$attr['ref'] = $result->ref;
		$attr['ref_ext'] = $result->ref_ext;
		$attr['label'] = $result->label;
		$attr['rang'] = $result->position;
		$attr['position'] = $result->position;
		$attr['entity'] = $result->entity;

		$sql = "SELECT COUNT(*) as nb FROM ".$this->db->prefix()."product_attribute_combination2val as pac2v";
		$sql .= " JOIN ".$this->db->prefix()."product_attribute_combination as pac ON pac2v.fk_prod_combination = pac.rowid";
		$sql .= " WHERE pac2v.fk_prod_attr = ".((int) $result->rowid)." AND pac.entity IN (".getEntity('product').")";

		$resql = $this->db->query($sql);
		$obj = $this->db->fetch_object($resql);

		$attr["is_used_by_products"] = (int) $obj->nb;

		return $attr;
	}

	/**
	 * Get attributes by ref_ext.
	 *
	 * @param  string $ref_ext External reference of Attribute
	 * @return array
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url GET attributes/ref_ext/{ref_ext}
	 */
	public function getAttributesByRefExt($ref_ext)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$ref_ext = trim($ref_ext);

		$sql = "SELECT rowid, ref, ref_ext, label, position, entity FROM ".$this->db->prefix()."product_attribute WHERE ref_ext LIKE '".$this->db->escape($ref_ext)."' AND entity IN (".getEntity('product').")";

		$query = $this->db->query($sql);

		if (!$this->db->num_rows($query)) {
			throw new RestException(404);
		}

		$result = $this->db->fetch_object($query);

		$attr = array();
		$attr['id'] = $result->rowid;
		$attr['ref'] = $result->ref;
		$attr['ref_ext'] = $result->ref_ext;
		$attr['label'] = $result->label;
		$attr['rang'] = $result->position;
		$attr['position'] = $result->position;
		$attr['entity'] = $result->entity;

		$sql = "SELECT COUNT(*) as nb FROM ".$this->db->prefix()."product_attribute_combination2val as pac2v";
		$sql .= " JOIN ".$this->db->prefix()."product_attribute_combination as pac ON pac2v.fk_prod_combination = pac.rowid";
		$sql .= " WHERE pac2v.fk_prod_attr = ".((int) $result->rowid)." AND pac.entity IN (".getEntity('product').")";

		$resql = $this->db->query($sql);
		$obj = $this->db->fetch_object($resql);
		$attr["is_used_by_products"] = (int) $obj->nb;

		return $attr;
	}

	/**
	 * Add attributes.
	 *
	 * @param  string $ref   Reference of Attribute
	 * @param  string $label Label of Attribute
	 * @param  string $ref_ext   Reference of Attribute
	 * @return int
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url POST attributes
	 */
	public function addAttributes($ref, $label, $ref_ext = '')
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		$prodattr = new ProductAttribute($this->db);
		$prodattr->label = $label;
		$prodattr->ref = $ref;
		$prodattr->ref_ext = $ref_ext;

		$resid = $prodattr->create(DolibarrApiAccess::$user);
		if ($resid <= 0) {
			throw new RestException(500, "Error creating new attribute");
		}
		return $resid;
	}

	/**
	 * Update attributes by id.
	 *
	 * @param  int $id    ID of Attribute
	 * @param  array $request_data Datas
	 * @return array
	 *
	 * @throws RestException
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url PUT attributes/{id}
	 */
	public function putAttributes($id, $request_data = null)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		$prodattr = new ProductAttribute($this->db);

		$result = $prodattr->fetch((int) $id);
		if ($result == 0) {
			throw new RestException(404, 'Attribute not found');
		} elseif ($result < 0) {
			throw new RestException(500, "Error fetching attribute");
		}

		foreach ($request_data as $field => $value) {
			if ($field == 'rowid') {
				continue;
			}
			$prodattr->$field = $value;
		}

		if ($prodattr->update(DolibarrApiAccess::$user) > 0) {
			$result = $prodattr->fetch((int) $id);
			if ($result == 0) {
				throw new RestException(404, 'Attribute not found');
			} elseif ($result < 0) {
				throw new RestException(500, "Error fetching attribute");
			} else {
				return $prodattr;
			}
		}
		throw new RestException(500, "Error updating attribute");
	}

	/**
	 * Delete attributes by id.
	 *
	 * @param  int $id 	ID of Attribute
	 * @return int		Result of deletion
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url DELETE attributes/{id}
	 */
	public function deleteAttributes($id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->supprimer) {
			throw new RestException(401);
		}

		$prodattr = new ProductAttribute($this->db);
		$prodattr->id = (int) $id;
		$result = $prodattr->delete(DolibarrApiAccess::$user);

		if ($result <= 0) {
			throw new RestException(500, "Error deleting attribute");
		}

		return $result;
	}

	/**
	 * Get attribute value by id.
	 *
	 * @param  int $id ID of Attribute value
	 * @return array
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url GET attributes/values/{id}
	 */
	public function getAttributeValueById($id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$sql = "SELECT rowid, fk_product_attribute, ref, value FROM ".$this->db->prefix()."product_attribute_value WHERE rowid = ".(int) $id." AND entity IN (".getEntity('product').")";

		$query = $this->db->query($sql);

		if (!$query) {
			throw new RestException(401);
		}

		if (!$this->db->num_rows($query)) {
			throw new RestException(404, 'Attribute value not found');
		}

		$result = $this->db->fetch_object($query);

		$attrval = array();
		$attrval['id'] = $result->rowid;
		$attrval['fk_product_attribute'] = $result->fk_product_attribute;
		$attrval['ref'] = $result->ref;
		$attrval['value'] = $result->value;

		return $attrval;
	}

	/**
	 * Get attribute value by ref.
	 *
	 * @param  int $id ID of Attribute value
	 * @param  string $ref Ref of Attribute value
	 * @return array
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url GET attributes/{id}/values/ref/{ref}
	 */
	public function getAttributeValueByRef($id, $ref)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$ref = trim($ref);

		$sql = "SELECT rowid, fk_product_attribute, ref, value FROM ".$this->db->prefix()."product_attribute_value";
		$sql .= " WHERE ref LIKE '".$this->db->escape($ref)."' AND fk_product_attribute = ".((int) $id)." AND entity IN (".getEntity('product').")";

		$query = $this->db->query($sql);

		if (!$query) {
			throw new RestException(401);
		}

		if (!$this->db->num_rows($query)) {
			throw new RestException(404, 'Attribute value not found');
		}

		$result = $this->db->fetch_object($query);

		$attrval = array();
		$attrval['id'] = $result->rowid;
		$attrval['fk_product_attribute'] = $result->fk_product_attribute;
		$attrval['ref'] = $result->ref;
		$attrval['value'] = $result->value;

		return $attrval;
	}

	/**
	 * Delete attribute value by ref.
	 *
	 * @param  int $id ID of Attribute
	 * @param  string $ref Ref of Attribute value
	 * @return int
	 *
	 * @throws RestException 401
	 *
	 * @url DELETE attributes/{id}/values/ref/{ref}
	 */
	public function deleteAttributeValueByRef($id, $ref)
	{
		if (!DolibarrApiAccess::$user->rights->produit->supprimer) {
			throw new RestException(401);
		}

		$ref = trim($ref);

		$sql = "SELECT rowid FROM ".$this->db->prefix()."product_attribute_value";
		$sql .= " WHERE ref LIKE '".$this->db->escape($ref)."' AND fk_product_attribute = ".((int) $id)." AND entity IN (".getEntity('product').")";
		$query = $this->db->query($sql);

		if (!$query) {
			throw new RestException(401);
		}

		if (!$this->db->num_rows($query)) {
			throw new RestException(404, 'Attribute value not found');
		}

		$result = $this->db->fetch_object($query);

		$attrval = new ProductAttributeValue($this->db);
		$attrval->id = $result->rowid;
		$result = $attrval->delete(DolibarrApiAccess::$user);
		if ($result > 0) {
			return 1;
		}

		throw new RestException(500, "Error deleting attribute value");
	}

	/**
	 * Get all values for an attribute id.
	 *
	 * @param  int $id ID of an Attribute
	 * @return array
	 *
	 * @throws RestException 401
	 * @throws RestException 500	System error
	 *
	 * @url GET attributes/{id}/values
	 */
	public function getAttributeValues($id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$objectval = new ProductAttributeValue($this->db);

		$return = $objectval->fetchAllByProductAttribute((int) $id);

		if (count($return) == 0) {
			throw new RestException(404, 'Attribute values not found');
		}

		foreach ($return as $key => $val) {
			$return[$key] = $this->_cleanObjectDatas($return[$key]);
		}

		return $return;
	}

	/**
	 * Get all values for an attribute ref.
	 *
	 * @param  string $ref Ref of an Attribute
	 * @return array
	 *
	 * @throws RestException 401
	 *
	 * @url GET attributes/ref/{ref}/values
	 */
	public function getAttributeValuesByRef($ref)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$ref = trim($ref);

		$return = array();

		$sql = "SELECT ";
		$sql .= "v.fk_product_attribute, v.rowid, v.ref, v.value FROM ".$this->db->prefix()."product_attribute_value as v";
		$sql .= " WHERE v.fk_product_attribute IN (SELECT rowid FROM ".$this->db->prefix()."product_attribute WHERE ref LIKE '".$this->db->escape($ref)."')";

		$resql = $this->db->query($sql);

		while ($result = $this->db->fetch_object($resql)) {
			$tmp = new ProductAttributeValue($this->db);
			$tmp->fk_product_attribute = $result->fk_product_attribute;
			$tmp->id = $result->rowid;
			$tmp->ref = $result->ref;
			$tmp->value = $result->value;

			$return[] = $this->_cleanObjectDatas($tmp);
		}

		return $return;
	}

	/**
	 * Add attribute value.
	 *
	 * @param  int    $id    ID of Attribute
	 * @param  string $ref   Reference of Attribute value
	 * @param  string $value Value of Attribute value
	 * @return int
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url POST attributes/{id}/values
	 */
	public function addAttributeValue($id, $ref, $value)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		if (empty($ref) || empty($value)) {
			throw new RestException(401);
		}

		$objectval = new ProductAttributeValue($this->db);
		$objectval->fk_product_attribute = ((int) $id);
		$objectval->ref = $ref;
		$objectval->value = $value;

		if ($objectval->create(DolibarrApiAccess::$user) > 0) {
			return $objectval->id;
		}
		throw new RestException(500, "Error creating new attribute value");
	}

	/**
	 * Update attribute value.
	 *
	 * @param  int $id ID of Attribute
	 * @param  array $request_data Datas
	 * @return array
	 *
	 * @throws RestException 401
	 * @throws RestException 500	System error
	 *
	 * @url PUT attributes/values/{id}
	 */
	public function putAttributeValue($id, $request_data)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		$objectval = new ProductAttributeValue($this->db);
		$result = $objectval->fetch((int) $id);

		if ($result == 0) {
			throw new RestException(404, 'Attribute value not found');
		} elseif ($result < 0) {
			throw new RestException(500, "Error fetching attribute value");
		}

		foreach ($request_data as $field => $value) {
			if ($field == 'rowid') {
				continue;
			}
			$objectval->$field = $value;
		}

		if ($objectval->update(DolibarrApiAccess::$user) > 0) {
			$result = $objectval->fetch((int) $id);
			if ($result == 0) {
				throw new RestException(404, 'Attribute not found');
			} elseif ($result < 0) {
				throw new RestException(500, "Error fetching attribute");
			} else {
				return $objectval;
			}
		}
		throw new RestException(500, "Error updating attribute");
	}

	/**
	 * Delete attribute value by id.
	 *
	 * @param  int $id ID of Attribute value
	 * @return int
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url DELETE attributes/values/{id}
	 */
	public function deleteAttributeValueById($id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->supprimer) {
			throw new RestException(401);
		}

		$objectval = new ProductAttributeValue($this->db);
		$objectval->id = (int) $id;

		if ($objectval->delete(DolibarrApiAccess::$user) > 0) {
			return 1;
		}
		throw new RestException(500, "Error deleting attribute value");
	}

	/**
	 * Get product variants.
	 *
	 * @param  int 	$id 			ID of Product
	 * @param  int  $includestock   Default value 0. If parameter is set to 1 the response will contain stock data of each variant
	 * @return array
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url GET {id}/variants
	 */
	public function getVariants($id, $includestock = 0)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$prodcomb = new ProductCombination($this->db);
		$combinations = $prodcomb->fetchAllByFkProductParent((int) $id);

		foreach ($combinations as $key => $combination) {
			$prodc2vp = new ProductCombination2ValuePair($this->db);
			$combinations[$key]->attributes = $prodc2vp->fetchByFkCombination((int) $combination->id);
			$combinations[$key] = $this->_cleanObjectDatas($combinations[$key]);

			if (!empty($includestock) && DolibarrApiAccess::$user->rights->stock->lire) {
				$productModel = new Product($this->db);
				$productModel->fetch((int) $combination->fk_product_child);
				$productModel->load_stock($includestock);
				$combinations[$key]->stock_warehouse = $this->_cleanObjectDatas($productModel)->stock_warehouse;
			}
		}

		return $combinations;
	}

	/**
	 * Get product variants by Product ref.
	 *
	 * @param  string $ref Ref of Product
	 * @return array
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url GET ref/{ref}/variants
	 */
	public function getVariantsByProdRef($ref)
	{
		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(401);
		}

		$result = $this->product->fetch('', $ref);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		$prodcomb = new ProductCombination($this->db);
		$combinations = $prodcomb->fetchAllByFkProductParent((int) $this->product->id);

		foreach ($combinations as $key => $combination) {
			$prodc2vp = new ProductCombination2ValuePair($this->db);
			$combinations[$key]->attributes = $prodc2vp->fetchByFkCombination((int) $combination->id);
			$combinations[$key] = $this->_cleanObjectDatas($combinations[$key]);
		}

		return $combinations;
	}

	/**
	 * Add variant.
	 *
	 * "features" is a list of attributes pairs id_attribute=>id_value. Example: array(id_color=>id_Blue, id_size=>id_small, id_option=>id_val_a, ...)
	 *
	 * @param  int $id ID of Product
	 * @param  float $weight_impact Weight impact of variant
	 * @param  float $price_impact Price impact of variant
	 * @param  bool $price_impact_is_percent Price impact in percent (true or false)
	 * @param  array $features List of attributes pairs id_attribute->id_value. Example: array(id_color=>id_Blue, id_size=>id_small, id_option=>id_val_a, ...)
	 * @param  string $reference Customized reference of variant
	 * @param  string $ref_ext External reference of variant
	 * @return int
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url POST {id}/variants
	 */
	public function addVariant($id, $weight_impact, $price_impact, $price_impact_is_percent, $features, $reference = '', $ref_ext = '')
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		if (empty($id) || empty($features) || !is_array($features)) {
			throw new RestException(401);
		}

		$weight_impact = price2num($weight_impact);
		$price_impact = price2num($price_impact);

		$prodattr = new ProductAttribute($this->db);
		$prodattr_val = new ProductAttributeValue($this->db);
		foreach ($features as $id_attr => $id_value) {
			if ($prodattr->fetch((int) $id_attr) < 0) {
				throw new RestException(401);
			}
			if ($prodattr_val->fetch((int) $id_value) < 0) {
				throw new RestException(401);
			}
		}

		$result = $this->product->fetch((int) $id);
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		$prodcomb = new ProductCombination($this->db);

		$result = $prodcomb->createProductCombination(DolibarrApiAccess::$user, $this->product, $features, array(), $price_impact_is_percent, $price_impact, $weight_impact, $reference, $ref_ext);
		if ($result > 0) {
			return $result;
		} else {
			throw new RestException(500, "Error creating new product variant");
		}
	}

	/**
	 * Add variant by product ref.
	 *
	 * "features" is a list of attributes pairs id_attribute=>id_value. Example: array(id_color=>id_Blue, id_size=>id_small, id_option=>id_val_a, ...)
	 *
	 * @param  string $ref                      Ref of Product
	 * @param  float  $weight_impact            Weight impact of variant
	 * @param  float  $price_impact             Price impact of variant
	 * @param  bool   $price_impact_is_percent  Price impact in percent (true or false)
	 * @param  array  $features                 List of attributes pairs id_attribute->id_value. Example: array(id_color=>id_Blue, id_size=>id_small, id_option=>id_val_a, ...)
	 * @return int
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url POST ref/{ref}/variants
	 */
	public function addVariantByProductRef($ref, $weight_impact, $price_impact, $price_impact_is_percent, $features)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		if (empty($ref) || empty($features) || !is_array($features)) {
			throw new RestException(401);
		}

		$weight_impact = price2num($weight_impact);
		$price_impact = price2num($price_impact);

		$prodattr = new ProductAttribute($this->db);
		$prodattr_val = new ProductAttributeValue($this->db);
		foreach ($features as $id_attr => $id_value) {
			if ($prodattr->fetch((int) $id_attr) < 0) {
				throw new RestException(404);
			}
			if ($prodattr_val->fetch((int) $id_value) < 0) {
				throw new RestException(404);
			}
		}

		$result = $this->product->fetch('', trim($ref));
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		$prodcomb = new ProductCombination($this->db);
		if (!$prodcomb->fetchByProductCombination2ValuePairs($this->product->id, $features)) {
			$result = $prodcomb->createProductCombination(DolibarrApiAccess::$user, $this->product, $features, array(), $price_impact_is_percent, $price_impact, $weight_impact);
			if ($result > 0) {
				return $result;
			} else {
				throw new RestException(500, "Error creating new product variant");
			}
		} else {
			return $prodcomb->id;
		}
	}

	/**
	 * Put product variants.
	 *
	 * @param  int $id ID of Variant
	 * @param  array $request_data Datas
	 * @return int
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url PUT variants/{id}
	 */
	public function putVariant($id, $request_data = null)
	{
		if (!DolibarrApiAccess::$user->rights->produit->creer) {
			throw new RestException(401);
		}

		$prodcomb = new ProductCombination($this->db);
		$prodcomb->fetch((int) $id);

		foreach ($request_data as $field => $value) {
			if ($field == 'rowid') {
				continue;
			}
			$prodcomb->$field = $value;
		}

		$result = $prodcomb->update(DolibarrApiAccess::$user);
		if ($result > 0) {
			return 1;
		}
		throw new RestException(500, "Error editing variant");
	}

	/**
	 * Delete product variants.
	 *
	 * @param  int $id 	ID of Variant
	 * @return int		Result of deletion
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 *
	 * @url DELETE variants/{id}
	 */
	public function deleteVariant($id)
	{
		if (!DolibarrApiAccess::$user->rights->produit->supprimer) {
			throw new RestException(401);
		}

		$prodcomb = new ProductCombination($this->db);
		$prodcomb->id = (int) $id;
		$result = $prodcomb->delete(DolibarrApiAccess::$user);
		if ($result <= 0) {
			throw new RestException(500, "Error deleting variant");
		}
		return $result;
	}

	/**
	 * Get stock data for the product id given.
	 * Optionaly with $selected_warehouse_id parameter user can get stock of specific warehouse
	 *
	 * @param  int $id ID of Product
	 * @param  int $selected_warehouse_id ID of warehouse
	 * @return int
	 *
	 * @throws RestException 500	System error
	 * @throws RestException 401
	 * @throws RestException 404
	 *
	 * @url GET {id}/stock
	 */
	public function getStock($id, $selected_warehouse_id = null)
	{

		if (!DolibarrApiAccess::$user->rights->produit->lire || !DolibarrApiAccess::$user->rights->stock->lire) {
			throw new RestException(401);
		}

		if (!DolibarrApi::_checkAccessToResource('product', $id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		$product_model = new Product($this->db);
		$product_model->fetch($id);
		$product_model->load_stock();

		$stockData = $this->_cleanObjectDatas($product_model)->stock_warehouse;
		if ($selected_warehouse_id) {
			foreach ($stockData as $warehouse_id => $warehouse) {
				if ($warehouse_id != $selected_warehouse_id) {
					unset($stockData[$warehouse_id]);
				}
			}
		}

		if (empty($stockData)) {
			throw new RestException(404, 'No stock found');
		}

		return ['stock_warehouses'=>$stockData];
	}

	// phpcs:disable PEAR.NamingConventions.ValidFunctionName.PublicUnderscore
	/**
	 * Clean sensible object datas
	 *
	 * @param   Object  $object     Object to clean
	 * @return  Object              Object with cleaned properties
	 */
	protected function _cleanObjectDatas($object)
	{
		// phpcs:enable
		$object = parent::_cleanObjectDatas($object);

		unset($object->statut);

		unset($object->regeximgext);
		unset($object->price_by_qty);
		unset($object->prices_by_qty_id);
		unset($object->libelle);
		unset($object->product_id_already_linked);
		unset($object->reputations);
		unset($object->db);
		unset($object->name);
		unset($object->firstname);
		unset($object->lastname);
		unset($object->civility_id);
		unset($object->contact);
		unset($object->contact_id);
		unset($object->thirdparty);
		unset($object->user);
		unset($object->origin);
		unset($object->origin_id);
		unset($object->fourn_pu);
		unset($object->fourn_price_base_type);
		unset($object->fourn_socid);
		unset($object->ref_fourn);
		unset($object->ref_supplier);
		unset($object->product_fourn_id);
		unset($object->fk_project);

		unset($object->mode_reglement_id);
		unset($object->cond_reglement_id);
		unset($object->demand_reason_id);
		unset($object->transport_mode_id);
		unset($object->cond_reglement);
		unset($object->shipping_method_id);
		unset($object->model_pdf);
		unset($object->note);

		unset($object->nbphoto);
		unset($object->recuperableonly);
		unset($object->multiprices_recuperableonly);
		unset($object->tva_npr);
		unset($object->lines);
		unset($object->fk_bank);
		unset($object->fk_account);

		unset($object->supplierprices);	// Mut use another API to get them

		if (empty(DolibarrApiAccess::$user->rights->stock->lire)) {
			unset($object->stock_reel);
			unset($object->stock_theorique);
			unset($object->stock_warehouse);
		}

		return $object;
	}

	/**
	 * Validate fields before create or update object
	 *
	 * @param  array $data Datas to validate
	 * @return array
	 * @throws RestException
	 */
	private function _validate($data)
	{
		$product = array();
		foreach (Products::$FIELDS as $field) {
			if (!isset($data[$field])) {
				throw new RestException(400, "$field field missing");
			}
			$product[$field] = $data[$field];
		}
		return $product;
	}

	/**
	 * Get properties of 1 product object.
	 * Return an array with product information.
	 *
	 * @param  int    $id                 		ID of product
	 * @param  string $ref                		Ref of element
	 * @param  string $ref_ext            		Ref ext of element
	 * @param  string $barcode            		Barcode of element
	 * @param  int    $includestockdata   		Load also information about stock (slower)
	 * @param  bool   $includesubproducts 		Load information about subproducts (if product is a virtual product)
	 * @param  bool   $includeparentid    		Load also ID of parent product (if product is a variant of a parent product)
	 * @param  bool   $includeifobjectisused	Check if product object is used and set property 'is_object_used' with result.
	 * @param  bool   $includetrans				Load also the translations of product label and description
	 * @return array|mixed                		Data without useless information
	 *
	 * @throws RestException 401
	 * @throws RestException 403
	 * @throws RestException 404
	 */
	private function _fetch($id, $ref = '', $ref_ext = '', $barcode = '', $includestockdata = 0, $includesubproducts = false, $includeparentid = false, $includeifobjectisused = false, $includetrans = false)
	{
		if (empty($id) && empty($ref) && empty($ref_ext) && empty($barcode)) {
			throw new RestException(400, 'bad value for parameter id, ref, ref_ext or barcode');
		}

		$id = (empty($id) ? 0 : $id);

		if (!DolibarrApiAccess::$user->rights->produit->lire) {
			throw new RestException(403);
		}

		$result = $this->product->fetch($id, $ref, $ref_ext, $barcode, 0, 0, ($includetrans ? 0 : 1));
		if (!$result) {
			throw new RestException(404, 'Product not found');
		}

		if (!DolibarrApi::_checkAccessToResource('product', $this->product->id)) {
			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
		}

		if (!empty($includestockdata) && DolibarrApiAccess::$user->rights->stock->lire) {
			$this->product->load_stock($includestockdata);

			if (is_array($this->product->stock_warehouse)) {
				foreach ($this->product->stock_warehouse as $keytmp => $valtmp) {
					if (isset($this->product->stock_warehouse[$keytmp]->detail_batch) && is_array($this->product->stock_warehouse[$keytmp]->detail_batch)) {
						foreach ($this->product->stock_warehouse[$keytmp]->detail_batch as $keytmp2 => $valtmp2) {
							unset($this->product->stock_warehouse[$keytmp]->detail_batch[$keytmp2]->db);
						}
					}
				}
			}
		}

		if ($includesubproducts) {
			$childsArbo = $this->product->getChildsArbo($id, 1);

			$keys = array('rowid', 'qty', 'fk_product_type', 'label', 'incdec', 'ref', 'fk_association', 'rang');
			$childs = array();
			foreach ($childsArbo as $values) {
				$childs[] = array_combine($keys, $values);
			}

			$this->product->sousprods = $childs;
		}

		if ($includeparentid) {
			$prodcomb = new ProductCombination($this->db);
			$this->product->fk_product_parent = null;
			if (($fk_product_parent = $prodcomb->fetchByFkProductChild($this->product->id)) > 0) {
				$this->product->fk_product_parent = $fk_product_parent;
			}
		}

		if ($includeifobjectisused) {
			$this->product->is_object_used = ($this->product->isObjectUsed() > 0);
		}

		return $this->_cleanObjectDatas($this->product);
	}
}
