updateItemQuantities mutation

[kidunot89]

…tation.

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What does this implement/fix? Explain your changes.

Refactors updateItemQuantity mutation to updateItemQuantities.

NOTE: As a convenience, if 0 is passed as the quantity the item will be removed from the cart.

• CartMutationsTest updated.
• CartItemQuantityInput type added.

Example usage

mutation ( $input: UpdateItemQuantitiesInput! ) {
    updateItemQuantities( input: $input ) {
        clientMutationId
        updated {
            ...cart item fields
        }
        removed {
            ...cart item fields
        }
        items {
            ...cart item fields
        }
    }
}

UpdateItemQuantitiesInput definition

'items' => array(
	'type'        => array( 'list_of' => 'CartItemQuantityInput' ),
	'description' => __( 'Cart item being updated', 'wp-graphql-woocommerce' ),
),

CartItemQuantityInput definition

'key'      => array(
	'type'        => array( 'non_null' => 'ID' ),
	'description' => __( 'Cart item being updated', 'wp-graphql-woocommerce' ),
),
'quantity' => array(
	'type'        => array( 'non_null' => 'Int' ),
	'description' => __( 'Cart item\'s new quantity', 'wp-graphql-woocommerce' ),
),

Does this close any currently open issues?

…

Any relevant logs, error output, GraphiQL screenshots, etc?

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Any other comments?

…

Where has this been tested?

Operating System: Ubuntu 18.04

WordPress Version: 5.2