Retail Orders - Item Unavailable Actions

In submitting an order as per Create Order, the customer's preference for actions to take if items are unavailable can be set as below example;

{
    "items": [
        {
            "plu": "COLA1",
            "name": "Coca Cola",
            "price": 450,
            "quantity": 1,
            "itemUnavailableActions": [
                "ITEM_AMENDMENT",
                "ITEM_REMOVE",
                "ITEM_SUBSTITUTION",
                "CANCEL_ORDER",
                "ITEM_SUBSTITUTION_CATALOG"
            ]
        }
    ]
}

Substitution Preference

Action	Meaning
`ITEM_AMENDMENT`	Change the quantity of the item or remove it
`ITEM_REMOVE`	Remove the item from the order
`ITEM_SUBSTITUTION`	Allow the item to be replaced with any other item
`CANCEL_ORDER`	Cancel the entire order
`ITEM_SUBSTITUTION_CUSTOMER`	Replace the item by another preselected item by the customer (see below)
`ITEM_SUBSTITUTION_CATALOG`	Allow the item to be replaced with another item

Substitution Preference

WhereITEM_SUBSTITUTION_CUSTOMER is selected, this should be accompanied by an array substituteCandidate that is a list of items the customer has selected as appropriate substitutions.

{
    "items": [
        {
            "plu": "COLA1",
            "name": "Coca Cola",
            "price": 450,
            "quantity": 1,
            "itemUnavailableActions": [
                "ITEM_SUBSTITUTION_CUSTOMER"
            ],
            "substituteCandidate": [
                {
                    "plu": "LEM1",
                    "name": "Lemonade",
                    "quantity": 1,
                    "price": 450
                },
                {
                    "plu": "PEP1",
                    "name": "Pepsi",
                    "quantity": 1,
                    "price": 450
                }
            ]
        }
    ]
}

Parameter	Meaning	Type
items.`plu` *	Unique reference for the product	string
items.`name` *	Item name	string
items.`price` *	Price of the item with 2 decimal digit precision e.g. $1.00 is set as 100	integer
items.`quantity` *	Item quantity	integer
items.`itemUnavailableActions` *	The customer's preference for actions to take if items are unavailable (see Substitution Preference)	enum array
substituteCandidate.`plu` *	Unique reference for a substituted product	string
substituteCandidate.`name` *	Name of a substituted product	string
substituteCandidate.`quantity`	Specifying the quantity of substituted items accepted is optional	integer
substituteCandidate.`price`	The price of the substituted item with 2 decimal digit precision e.g. $1.00 is set as 100	integer

Please note that all the fields marked with ( ( * ) ) will be required