Fix: promotion price can be set to 0 (RTC-41237)

Promotion price of offer item can be set to 0. When one of items has price set to 0, offer items grid is loaded properly. It is possible to export such offer item to excel file.

Changing the item list in the Promotion module when there is no connection to the Item Service (RTC-41204)

If the user want to edit item list through user interface but there is no connection with Item Service, the user receives a message in the red bar. The item list does not change in the promotion offer in order not to lose information about previously added items but there is an information that the selection contains 0 items/variants/models. The display will change if the selection has changed but the items do not change, e.g. the items will be displayed as models. In this case, the columns in the grid will change

If the user wants to edit the item list via an Excel file while the Item Service is not working, the result is as follows: The notification 'Items in offer could not be synced with Item Service' top right corner and message 'Manage item list is not available until offer items are synced. You will be notified once the items are synced.' at the top of the grid are visible. 'Edit item list' button is not available. Imports from 3rd parties work very similarly. The only difference is the lack of notification.

Only offer groups with processed and synced items can be copied.

It's possible to import Excel if model number is not specified but there is external model number in the file.

OfferGroupProcessor job is triggered by default every 5 minutes.

Put request for adding items to the offer (RTC-41208)

PUT request /promotions/[EgPromotionIdentifier]/offers/[EgOfferIdentifier]/items in Promotion Service is supported.
Request body must be as documented in Swagger. For more information and rules regarding API, please refer to description and endpoint schema in 'Promotion Service Gateway API' part of Swagger, as well as 'File-import documentation' (all the business rules of import apply to API).
Items can be imported to offers with mix type supported in 'PUT Offer' request. Maximum 500 items can be sent. Each request with items to offer group result in removing items which were in offer previously. Items and prices lookup is done only in Promotion database. Logic of all lookups is as in OfferGroupProcessor job (it means this work the same as imports and user interface actions). Items are added to offer as 'offline item list' and data is exported to POS. Then, during next scheduled OfferGroupProcessor job run (default 5 minutes cron), such new item list is synced to item service, and previous one is deleted. Offer group items cannot be updated in user interface until item list in item service is synced.
Errors regarding promotion, offer, item, price lookup and contract schema are returned as a part of request response. It also contains upsert status, count of items without price and count of not found items.

Fix: duplicates of ExternalModelNo (RTC-42961)

Import of items from Item Service saves item on model level with empty ExternalModelNo if received value is already used by other model in Promotion database. Additionally, release of RTC-41204 does not fail when there are ExternalModelNo duplicates in database (suffix is added to duplicate).