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# fe-serial-flow-builder

It is tricky to next API calls when trying to fetch a bunch of data:
javascript being asynchronous, it will not wait for the next API call to be made will return a partial result. We eventually need to serialise these API calls.
The following service allows that: For a given list of entities, it will execute any task given as parameter.

Examples below:

Example where no nested API call is needed, simply loop through another list of entities within the arrayList already given.
SerialFlowService.serialiseEntityParsing(ArrayList,
[
	getFulfilmentBasicInfo,
	initOrder,
	{
		endpoint: 'items',
		taskList: [
			getFulfilmentItemsBasicInfo,
			getFulfilmentItemsQty,
			initItemOrder
		]
	}
],
successHandler);


More complicated example where a nested API call is made within the ArrayList
SerialFlowService.serialiseEntityParsing(ArrayList,
[
	getFulfilmentBasicInfo,
	getFulfilmentActions,
	{
		endpoint: ppOrderService.getOrderDetails,
		root: 'order',
		params: 'orderId',
		taskList: [
			getOrderCustomerNameInfo
		]
	}
]
successHandler);


Final example where several array list / API calls are being made
SerialFlowService.serialiseEntityParsing(ArrayList,
[
	getFulfilmentBasicInfo,
	getFulfilmentActions,
	{
		endpoint: ppOrderService.getOrderDetails,
		root: 'order',
		params: 'orderId',
		taskList: [
			getOrderCustomerNameInfo,
			getOrderCustomerContactInfo
		]
	},
	{
		endpoint: 'items',
		taskList: [
			getFulfilmentItemsBasicInfo,
			{
				endpoint: ppSkuService.search,
				root: 'sku',
				params: ['skuRef'],
				taskList: [
					getSkuBasicInfo,
					getSkuAttributes,
					getSkuReferences
				]
			}
		]
	}
]
successHandler);