ServiceStrategy

public class ServiceStrategy<CardItem> : ObservableObject, AsyncAnnotationLoadingStrategy where CardItem : CardItemModel, CardItem : Decodable, CardItem : Encodable

A loading strategy that makes a network fetch request to Mobile Services to return the data necessary to display an AR Annotation Scene. This strategy wraps the anchors that represents these locations with the CardItemModels that they correspond to in a ScreenAnnotation struct for a single source of truth. Loading the data into the ARAnnotationViewModel should be done in the onAppear method.

Usage

@StateObject var serviceStrategy = ServiceStrategy<CodableCardItem>(
    serviceURL: URL(string: IntegrationTest.System.redirectURL)!,
    sapURLSession: SAPURLSession.createOAuthURLSession(
        clientID: IntegrationTest.System.clientID,
        authURL: IntegrationTest.System.authURL,
        redirectURL: IntegrationTest.System.redirectURL,
        tokenURL: IntegrationTest.System.tokenURL
    ),
    sceneIdentifier: SceneIdentifyingAttribute.id(IntegrationTest.TestData.sceneId)

 arModel.loadAsync(loadingStrategy: serviceStrategy)

sceneIdentifier
Unique attribute and its value identifiying a scene stored in SAP Mobile Services
Declaration
Swift

public var sceneIdentifier: SceneIdentifyingAttribute


                      
                      
                      init(serviceURL:sapURLSession:sceneIdentifier:)

Initializer

Declaration

Swift

public init(serviceURL: URL, sapURLSession: SAPURLSession, sceneIdentifier: SceneIdentifyingAttribute)

Parameters

`serviceURL`	Server URL for your application in SAP Mobile Services
`sapURLSession`	networking API from SAPFoundation framework
`sceneIdentifier`	unique value identifiying a scene stored in SAP Mobile Services


                      
                      
                      load(with:completionHandler:)

Performs network requests to load scene information from SAP Mobile Services

Declaration

Swift

public func load(with manager: ARManager, completionHandler: @escaping ([ScreenAnnotation<CodableCardItem>], GuideImageState) -> Void) throws

Parameters

`manager`	handling the ARView
`completionHandler`	providing the cards and image anchor of the requested scene once loaded