[*] BO : you can know download the previous file near the upload file input

admin-dev/themes/default/template/helpers/form/form.tpl

@@ -509,7 +509,7 @@
 								{elseif $input.type == 'categories_select'}
 									{$input.category_tree}
 								{elseif $input.type == 'asso_shop' && isset($asso_shop) && $asso_shop}
-										{$asso_shop}
+									{$asso_shop}
 								{elseif $input.type == 'color'}
 								<div class="col-lg-2">
 									<div class="row">

admin-dev/themes/default/template/helpers/uploader/simple.tpl

@@ -56,6 +56,14 @@
 				<button id="{$id}-selectbutton" type="button" name="submitAddAttachments" class="btn btn-default">
 					<i class="icon-folder-open"></i> {if isset($multiple) && $multiple}{l s='Add files'}{else}{l s='Add file'}{/if}
 				</button>
+				{if isset($file)}
+				<a href="{$file}">
+					<button type="button" class="btn btn-default">
+						<i class="icon-download"></i>
+						{if isset($size)}{l s='Download current file (%skb)' sprintf=$size}{else}{l s='Download current file'}{/if}
+					</button>
+				</a>
+				{/if}
 			</span>
 		</div>
 	</div>

classes/Attachment.php

@@ -106,8 +106,8 @@ class AttachmentCore extends ObjectModel
 	public static function deleteProductAttachments($id_product)
 	{
 		$res = Db::getInstance()->execute('
-			DELETE FROM '._DB_PREFIX_.'product_attachment
-			WHERE id_product = '.(int)$id_product);
+		DELETE FROM '._DB_PREFIX_.'product_attachment
+		WHERE id_product = '.(int)$id_product);
 
 		Product::updateCacheAttachment((int)$id_product);
 		

classes/helper/HelperForm.php

@@ -122,6 +122,7 @@ class HelperFormCore extends Helper
 							$uploader->setImage(isset($params['image'])?$params['image']:null);
 							$uploader->setThumb(isset($params['thumb'])?$params['thumb']:null);
 							$uploader->setSize(isset($params['size'])?$params['size']:null);
+							$uploader->setFile(isset($params['file'])?$params['file']:null);
 							$uploader->setTitle(isset($params['title'])?$params['title']:null);
 							$uploader->setDeleteUrl(isset($params['delete_url'])?$params['delete_url']:null);
 

classes/helper/HelperUploader.php

@@ -38,6 +38,7 @@ class HelperUploaderCore extends Uploader
 	private   $_name;
 	private   $_multiple;
 	private   $_size;
+	private   $_file;
 	protected $_template;
 	private   $_template_directory;
 	private   $_title;
@@ -195,6 +196,17 @@ class HelperUploaderCore extends Uploader
 			return $this->getTemplateDirectory().$template;
 	}
 
+	public function setFile($value)
+	{
+		$this->_file = $value;
+		return $this;
+	}
+
+	public function getFile()
+	{
+		return $this->_file;
+	}
+
 	public function setTitle($value)
 	{
 		$this->_title = $value;
@@ -303,6 +315,7 @@ class HelperUploaderCore extends Uploader
 			'display_image' => $this->displayImage(),
 			'image'         => $this->getImage(),
 			'thumb'         => $this->getThumb(),
+			'file'          => $this->getFile(),
 			'size'          => $this->getSize(),
 			'delete_url'    => $this->getDeleteUrl(),
 			'title'         => $this->getTitle()

controllers/admin/AdminAttachmentsController.php

@@ -78,6 +78,12 @@ class AdminAttachmentsControllerCore extends AdminController
 
 	public function renderForm()
 	{
+		if (($obj = $this->loadObject(true)) && Validate::isLoadedObject($obj))
+		{
+			$link = $this->context->link->getPageLink('attachment', true, NULL, 'id_attachment='.$obj->id);
+			$size = round(filesize(_PS_DOWNLOAD_DIR_.$obj->file) / 1024);
+		}
+
 		$this->fields_form = array(
 			'legend' => array(
 				'title' => $this->l('Attachment'),
@@ -90,22 +96,26 @@ class AdminAttachmentsControllerCore extends AdminController
 					'name' => 'name',
 					'required' => true,
 					'lang' => true,
+					'col' => 4
 				),
 				array(
 					'type' => 'textarea',
 					'label' => $this->l('Description:'),
 					'name' => 'description',
 					'lang' => true,
+					'col' => 6
 				),
 				array(
 					'type' => 'file',
+					'file' => isset($link) ? $link : null,
+					'size' => isset($size) ? $size : null,
 					'label' => $this->l('File:'),
 					'name' => 'file',
-					'hint' => $this->l('Upload a file from your computer.')
+					'col' => 6
 				),
 			),
 			'submit' => array(
-				'title' => $this->l('Save   '),
+				'title' => $this->l('Save'),
 				'class' => 'button'
 			)
 		);