{"action":"created","comment":{"url":"https://api.github.com/repos/Sylius/Sylius/pulls/comments/48597656","id":48597656,"diff_hunk":"@@ -0,0 +1,76 @@\n+<?php\n+\n+/*\n+ * This file is part of the Sylius package.\n+ *\n+ * (c) Paweł Jędrzejewski\n+ *\n+ * For the full copyright and license information, please view the LICENSE\n+ * file that was distributed with this source code.\n+ */\n+\n+namespace Sylius\\Bundle\\CoreBundle\\Modifier;\n+\n+use Sylius\\Component\\Core\\Model\\OrderItemInterface;\n+use Sylius\\Component\\Resource\\Factory\\FactoryInterface;\n+\n+/**\n+ * @author Mateusz Zalewski <mateusz.zalewski@lakion.com>\n+ */\n+class OrderItemQuantityModifier implements OrderItemQuantityModifierInterface\n+{\n+    /**\n+     * @var FactoryInterface\n+     */\n+    private $orderItemUnitFactory;\n+\n+    /**\n+     * @param FactoryInterface $orderItemUnitFactory\n+     */\n+    public function __construct(FactoryInterface $orderItemUnitFactory)\n+    {\n+        $this->orderItemUnitFactory = $orderItemUnitFactory;\n+    }\n+\n+    /**\n+     * {@inheritdoc}\n+     */\n+    public function modify(OrderItemInterface $orderItem, $targetQuantity)\n+    {\n+        if ($targetQuantity === $itemQuantity = $orderItem->getQuantity()) {\n+            return;\n+        }\n+\n+        if ($targetQuantity > $itemQuantity) {\n+            $this->increaseUnitsNumber($orderItem, $targetQuantity - $itemQuantity);\n+\n+            return;\n+        }\n+\n+        $this->decreaseUnitsNumber($orderItem, $itemQuantity, $targetQuantity);\n+    }\n+\n+    /**\n+     * @param OrderItemInterface $orderItem\n+     * @param int $targetUnitsNumber\n+     */\n+    private function increaseUnitsNumber(OrderItemInterface $orderItem, $targetUnitsNumber)\n+    {\n+        for ($i = 0; $i < $targetUnitsNumber; $i++) {\n+            $unit = $this->orderItemUnitFactory->createNew();\n+            $orderItem->addUnit($unit);\n+        }","path":"src/Sylius/Bundle/CoreBundle/Modifier/OrderItemQuantityModifier.php","position":62,"original_position":62,"commit_id":"edf53570fdfdb63ec8758ffaa6d0deebf6e657e6","original_commit_id":"edf53570fdfdb63ec8758ffaa6d0deebf6e657e6","user":{"login":"Zales0123","id":6212718,"avatar_url":"https://avatars.githubusercontent.com/u/6212718?v=3","gravatar_id":"","url":"https://api.github.com/users/Zales0123","html_url":"https://github.com/Zales0123","followers_url":"https://api.github.com/users/Zales0123/followers","following_url":"https://api.github.com/users/Zales0123/following{/other_user}","gists_url":"https://api.github.com/users/Zales0123/gists{/gist_id}","starred_url":"https://api.github.com/users/Zales0123/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Zales0123/subscriptions","organizations_url":"https://api.github.com/users/Zales0123/orgs","repos_url":"https://api.github.com/users/Zales0123/repos","events_url":"https://api.github.com/users/Zales0123/events{/privacy}","received_events_url":"https://api.github.com/users/Zales0123/received_events","type":"User","site_admin":false},"body":"Sure, so ``addUnit`` is going to increate ``$quantity`` property, and ``removeUnit`` - decrease. In fact it can be done even know, doesn't it?","created_at":"2015-12-30T10:46:34Z","updated_at":"2015-12-30T10:46:34Z","html_url":"https://github.com/Sylius/Sylius/pull/3795#discussion_r48597656","pull_request_url":"https://api.github.com/repos/Sylius/Sylius/pulls/3795","_links":{"self":{"href":"https://api.github.com/repos/Sylius/Sylius/pulls/comments/48597656"},"html":{"href":"https://github.com/Sylius/Sylius/pull/3795#discussion_r48597656"},"pull_request":{"href":"https://api.github.com/repos/Sylius/Sylius/pulls/3795"}}},"pull_request":{"url":"https://api.github.com/repos/Sylius/Sylius/pulls/3795","id":54789752,"html_url":"https://github.com/Sylius/Sylius/pull/3795","diff_url":"https://github.com/Sylius/Sylius/pull/3795.diff","patch_url":"https://github.com/Sylius/Sylius/pull/3795.patch","issue_url":"https://api.github.com/repos/Sylius/Sylius/issues/3795","number":3795,"state":"open","locked":false,"title":"[Order] Implementation of OrderItemQuantityModifier","user":{"login":"Zales0123","id":6212718,"avatar_url":"https://avatars.githubusercontent.com/u/6212718?v=3","gravatar_id":"","url":"https://api.github.com/users/Zales0123","html_url":"https://github.com/Zales0123","followers_url":"https://api.github.com/users/Zales0123/followers","following_url":"https://api.github.com/users/Zales0123/following{/other_user}","gists_url":"https://api.github.com/users/Zales0123/gists{/gist_id}","starred_url":"https://api.github.com/users/Zales0123/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Zales0123/subscriptions","organizations_url":"https://api.github.com/users/Zales0123/orgs","repos_url":"https://api.github.com/users/Zales0123/repos","events_url":"https://api.github.com/users/Zales0123/events{/privacy}","received_events_url":"https://api.github.com/users/Zales0123/received_events","type":"User","site_admin":false},"body":"| Q             | A\r\n| ------------- | ---\r\n| Bug fix?      | no\r\n| New feature?  | yes\r\n| BC breaks?    | no\r\n| Deprecations? | no\r\n| Fixed tickets |\r\n| License       | MIT\r\n| Doc PR        |\r\n\r\nThis PR is based on https://github.com/Sylius/Sylius/pull/3771 and correspond with @michalmarcinkowski work in https://github.com/Sylius/Sylius/pull/3786.\r\n\r\nIn this PR there is ``OrderItemQuantityModifier`` implemented, that handles item units management. The idea is, to change ``OrderItem`` quantity only by adding/removing units.\r\n\r\n**Possible improvements/modifications**\r\n- it will be better to remove *backordered* units first, then *sold* ones\r\n- we could remove ``setQuantity`` method from ``OrderItem`` as it's not longer needed, but to make it work fully, recalculation logic from https://github.com/Sylius/Sylius/pull/3786 must be 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