Create an SAPUI5 Application for SAP Variant Configuration and Pricing

1. Go to the SAP Business Application Studio. Accept the SAP Business Application Studio Trial Privacy Statement when it pops up. Click on Create Dev Space.

   

   In the name field, enter ProductConfigurationUI, choose SAP Fiori, and then choose Create Dev Space.

   

2. When the status changes to Running, click on the space name created. Accept the SAP Business Application Studio Trial Privacy Statement when it pops up.

   

3. In the Create Dev Space, create a new project from the template via menu File > New Project from Template.

   

   Choose the template SAP Fiori application and then Start.

   Choose Application Type SAPUI5 freestyle and the SAPUI5 Application floor plan, then choose Next.

   

   Choose Data source None, and then Next.

   

   You may want to rename the initial View name as Main, then choose Next.

   

   Provide the following:

   • Module name: such as product_configuration_api_tutorial

   • Application title: such as Product Configuration API Tutorial

   • Application namespace such as sap.tutorial

   • Description such as Product Configuration API Tutorial

   Keep the default for the other parameters, then choose Finish.

   

   Choose the project you created and click Open.

4. The application is now created. It can be opened via the menu File > Open Workspace….

   

   Choose the project you created and click Open.

   

5. The application will call the Variant Configuration service during the initialization of the form. The controller, can be found at ProductConfigurationAPITutorial > webapp > controller > Main.controller.js, in which the service APIs will be called.

   

   You will call the following cloud service APIs:

   • POST /api/v2/configurations to create a new product configuration.
   • GET /api/v2/knowledgebases/{kbId} to read static master data for display (descriptions of a characteristic and its values in our example).
   • PATCH /api/v2/configurations/{configurationId}/items/{itemId}/characteristics/{characteristicId} to change a characteristic value.
   • GET /api/v2/configurations/{configurationId} to read and displayed the changed configuration results.
   • POST /api/v1/statelesspricing to get the price based on the chosen characteristic value.

1. In the [API Business Hub] (https://api.sap.com/) search for SAP Variant Configuration, find the SAP Variant Configuration and Pricing API Package and choose it.

   

2. Once on the API package page, choose Variant Configuration service.

   

3. In the Test View find the POST /api/v2/configurations method and click on the Code Snippet link.

   

Click on the JavaScript tab and copy the code.

1. Back in SAP Business Application Studio, add the copied code from the API Business Hub to your onInit function.

2. Replace in the code the data variable by using the example input JSON found for the service on API Hub.

   

3. Remove xhr.setRequestHeader("DataServiceVersion", "2.0"; from the onInit function because configuration and pricing service does not allow this header field and it is blocked by CORS policy. Make sure to remove it from the copied snippets.

   

   An API Key is used as an authentication method. Each time an API is called, the API Key needs to be sent in the http request header. Make sure you are logged in SAP API Business Hub to get your API Key.

4. Click on Show API Key.

   

   This will show the API key in pop up view. Click on the button Copy Key and Close.

   

   Add the API key as a request header to the copied code in your onInit function as xhr.setRequestHeader("APIKey", "<API-Key>")

   

   ESLINT errors caused by console statement or hard-coded URL can be switched off in project settings or by inserting Java /* eslint-disable */ in the first line.

Run your new application to test it.

1. Open the Run Configurations view.

   

2. Expand the run configuration and hover over the run configuration and choose the Run Module icon.

   

   If you are running the app for the first time, the button of the notification will say Expose and Open. Otherwise, it will say Open in New Tab.

3. You should see a blank application with the title opened in a new tab. The pre-generated code puts the results of the API in the browser console. To find the result, open your browser’s developer tools and go to the Console tab.

   

   Which field in the response body of service endpoint /api/v2/configurations returns the unique identifier of the configuration? This identifier must be provided as input field configurationId to the subsequent calls to the other endpoints, e.g. to change a characteristic value.

The result from the API consists of the configuration, characteristics, and characteristic values.

1. Add a ComboBox to display characteristic CPS_OPTION_M value. Open your main view and add a ComboBox. The ComboBox items and selected item will be set from the result of the API call.

   

   JavaScript Copy

   <mvc:View controllerName="sap.tutorial.ProductConfigurationAPITutorial.controller.Main" xmlns:html="http://www.w3.org/1999/xhtml" xmlns:mvc="sap.ui.core.mvc" xmlns:core="sap.ui.core"  displayBlock="true" xmlns="sap.m">
           <App id="app">
               <pages>
                   <Page title="{i18n>title}">
                       <content>
                           <ComboBox items="{/possible_values}" selectedKey="{/value}">
                               <core:Item key="{valueLow}" text="{valueLow}"/>
                           </ComboBox>
                       </content>
                   </Page>
               </pages>
           </App>
   </mvc:View>

   Ensure that core namespace is declared via xmlns:core="sap.ui.core"

2. Back in the controller file, you will need to define the model used in the view. You need to add the JSONModel library to your controller. In the define at the top of the controller, add the JSONModel library by adding sap/ui/model/json/JSONModel and defining the JSONModel in the controller function.

   

   JavaScript Copy

   sap.ui.define([
       "sap/ui/core/mvc/Controller",
       "sap/ui/model/json/JSONModel"
   ], function (Controller, JSONModel) {

3. In the onInit function, you need to save the current version so that you can access the view associated with the controller in the API call response. Create a new variable called self and set it to this.

   JavaScript Copy

   var self = this;

4. Additionally, you need to create a new JSONModel to house the results of the API call. Bind a new empty JSONModel to the view.

   JavaScript Copy

   this.getView().setModel(new JSONModel({}));

5. To actually bind the result to the model, you need to parse the API response in the xhr.addEventListener function. The result from the API comes back as text, so you need to parse it to JSON.

   JavaScript Copy

   var jsonResults = JSON.parse(this.responseText);

6. Then, you can set the relevant properties into the model. The ComboBox needs CPS_OPTION_M possible values and its initial value.

   JavaScript Copy

   var CPS_OPTION_M = jsonResults.rootItem.characteristics.find(function (i) { return i.id === "CPS_OPTION_M"; });
   self.getView().getModel().setProperty("/possible_values", CPS_OPTION_M.possibleValues);
   if (CPS_OPTION_M.values.length > 0) {
     self.getView().getModel().setProperty("/value", CPS_OPTION_M.values[0].value);
   } else {
     self.getView().getModel().setProperty("/value", "");
   }

   The used find() statement is not supported by Internet Explorer 11.

   

7. Save the changes. If you execute the application, you will see a ComboBox filled with CPS_OPTION_M characteristic possible values, having the selected value be the default value for this characteristic.

   

1. Update the configuration if the user changes the value of the ComboBox. First, you need to declare a new event on the ComboBox control in the view.

   

   JavaScript Copy

<mvc:View controllerName=“sap.tutorial.ProductConfigurationAPITutorial.controller.Main” xmlns:html=“http://www.w3.org/1999/xhtml" xmlns:mvc=“sap.ui.core.mvc” xmlns:core=“sap.ui.core” displayBlock=“true” xmlns=“sap.m”> <core:Item key="{valueLow}” text="{valueLow}"/> </mvc:View>

2. Back to the main controller, create an empty `onChange` function.

    ```JavaScript
onChange: function (oEvent) {
}

As in step 3, head over to SAP API Business Hub, locate the PATCH /api/v2/configurations/{configurationId}/items/{itemId}/characteristics/{characteristicId} API under Test View and copy the JavaScript code.

![step-6-numeral-2-patch](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/productconfiguration-ui5-app-create/step-6-numeral-2-patch.png)

3. Add the copied JavaScript code from API Business Hub to the newly created onChange function. Make sure to remove xhr.setRequestHeader("DataServiceVersion", "2.0"); and add API Key.

   

4. Change the data variable declaration to assign the value from the value property of the view model, which is bound to the ComboBox value.

   JavaScript Copy

var data = JSON.stringify({ “values”: [{ “value”: this.getView().getModel().getProperty("/value"), “selected”: true }] });

    Since this API PATCH method does not return a response body, in the `xhr.addEventListener` call of the `onChange` function, you may change the console log so that the response code is logged instead of the response text.

    ```JavaScript
console.log(this.status);

5. To fill out all parameters for this API method, you need to add a few fields in the view model, namely configuration id and item id. Add these new properties on the model in the xhr.addEventListener call of the onInit function so that the model is filled when the configuration is loaded.

   JavaScript Copy

self.getView().getModel().setProperty("/config_id", jsonResults.id); self.getView().getModel().setProperty("/item_id", jsonResults.rootItem.id);

6. Once they are added in the model, replace hard-coded `{configurationID}` and `{itemID}` in the generated `url` in the `onChange` function by the values in the model. Likewise, replace hard-coded `{characteristidID}` by `CPS_OPTION_M`.

    ```JavaScript
xhr.open("PATCH",
    "https://sandbox.api.sap.com/cpservices/prodconf/api/v2/configurations/" +
    this.getView().getModel().getProperty("/config_id") + "/items/" +
    this.getView().getModel().getProperty("/item_id") + "/characteristics/CPS_OPTION_M "
);

Almost done! The variant configuration API uses HTTP header fields `etag` and `If-Match` as an optimistic lock. You need to capture the `etag` header in the model from the HTTP response when loading the configuration and send back that value in the `If-Match HTTP` header when updating the configuration. In the **`xhr.addEventListener`** call of the `onInit` function, set the `etag` property of the model with the `etag` value of the response header.

```JavaScript

self.getView().getModel().setProperty("/etag", this.getResponseHeader(“etag”));

    You also you need to capture the `etag` value of the characteristic change response in case the user wants to update the value multiple times. Add the same line in the **`xhr.addEventListener`** call of the `onChange` function.
     Back in the `onChange` function, fill the `If-Match` request header value with the `etag` value of the model.

    ```JavaScript
xhr.setRequestHeader("If-Match", this.getView().getModel().getProperty("/etag"));

![step-6-numeral-6-onInit-function](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/productconfiguration-ui5-app-create/step-6-numeral-6-onInit-function.png)

>Do not forget variable `self` in this and the coming new functions.

7. Run your application. You should see a ComboBox filled with the possible values of characteristic CPS_OPTION_M, having the selected value be the default value for this characteristic. If you change the value of the ComboBox, the call is made to the API to change the value, and you can see the response code in the JavaScript console, which should be 200.

   

   By how much is the eTag value in the service response header increased with each change to the characteristic CPS_OPTION_M? Check the development tools of your browser.

Currently, the value keys are displayed in the interface. In a real-world scenario, you might want to provide the value descriptions to the user and add a label to the combo box. This can be achieved by getting the knowledge base details.

1. Create a new method readKb in the controller that takes a knowledge base id as parameter.

   When creating a configuration (Step 3), the knowledge base id is returned from the API. To get the KB details, another API needs to be called. Go to the API Business Hub (as in step 2), locate the GET/api/v2/knowledgebases/{kbId} method, copy the JavaScript code then paste it in the readKb function.

   

   Modify the URL of the request to include the knowledge base ID function parameter.

   JavaScript Copy

   xhr.open("GET", "https://sandbox.api.sap.com/cpservices/prodconf/api/v2/knowledgebases/" + kbId + "?$select=products,classes,characteristics,characteristicSpecifics,bomItems,description");

   Make sure to remove xhr.setRequestHeader("DataServiceVersion", "2.0"); and add API Key.

2. You need to bind the possible values to the model by parsing the response text to JSON then retrieving the possible_values property of CPS_OPTION_M. Also, add the characteristic name to a new model property /name.

   JavaScript Copy

   var jsonResults = JSON.parse(this.responseText);
   var CPS_OPTION_M = jsonResults.characteristics.find(function (i) {
   return i.id === "CPS_OPTION_M";
   });
   self.getView().getModel().setProperty("/possible_values", CPS_OPTION_M.possibleValues);
   self.getView().getModel().setProperty("/name", CPS_OPTION_M.name);

   

   Remember to remove the assignment of possible_values to the model in the addEventListener function of the onInit function.

3. Now, you need to call the new function readKb when the configuration is created with the knowledge base id, at the addEventListener of the onInit function.

   

   In the view, add a SimpleForm which contains the previous ComboBox and a new Label. Set the label text to the new model property /name.

4. Finally, adjust the ComboBox control in the view so that elements id and name of possible_values are used as key and text respectively.

   

   XML Copy

   <sap.ui.layout.form:SimpleForm xmlns:sap.ui.layout.form="sap.ui.layout.form" editable="true" layout="ResponsiveGridLayout" id="form0">
   <sap.ui.layout.form:content>
   <Label text="{/name}" id="label"/>
   <ComboBox items="{/possible_values}" selectedKey="{/value}" selectionChange="onChange">
   <core:Item key="{id}" text="{name}"/>
   </ComboBox>
   </sap.ui.layout.form:content>
   </sap.ui.layout.form:SimpleForm>

   Run your application. The value descriptions are provided by the ComboBox, and the label text comes from the knowledge base.

   

In addition to the configuration, SAP Variant Configuration and Pricing also provides a way to calculate the pricing.

In the Burger model, the price is influenced by the menu option. By changing the menu option values, we should see a difference in the calculated price.

For the pricing API to correctly reflect the status of the configuration, the variant condition characteristic values needs to be provided. Which means that the configuration needs to be read after updating it in the app.

1. Locate the GET /api/v2/configurations/{configurationId} in the SAP API Business Hub, copy the JavaScript code and paste it in a new method _getConfig. Modify the URL of the request to include the configuration ID from the model.

   JavaScript Copy

   xhr.open("GET", "https://sandbox.api.sap.com/cpservices/prodconf/api/v2/configurations/" + this.getView().getModel().getProperty("/config_id"));

   Make sure to remove xhr.setRequestHeader("DataServiceVersion", "2.0"); and add API Key.

2. In the xhr.addEventListener function, assign the configuration JSON in a new attribute self._config.

   

   Call this new method from the xhr.addEventListener function of the onChange method, so that the configuration is read again as soon as it is modified.

   

3. Next, add new read-only fields that will be used to show the base price and selected options as well as a button to calculate the price.

   

   JavaScript Copy

   <mvc:View controllerName="sap.tutorial.ProductConfigurationAPITutorial.controller.Main" xmlns:html="http://www.w3.org/1999/xhtml" xmlns:mvc="sap.ui.core.mvc" xmlns:core="sap.ui.core"  displayBlock="true" xmlns="sap.m">
           <App id="app">
               <pages>
                   <Page title="{i18n>title}">
                       <content>
                           <sap.ui.layout.form:SimpleForm xmlns:sap.ui.layout.form="sap.ui.layout.form" editable="true" layout="ResponsiveGridLayout" id="form0">
                           <sap.ui.layout.form:content>
                               <Label text="{/name}" id="label"/>
                               <ComboBox items="{/possible_values}" selectedKey="{/value}" selectionChange="onChange">
                                   <core:Item key="{id}" text="{name}"/>
                               </ComboBox>
                               <Label text="{i18n>basePrice}"/>
                               <Input value="{/base_price}" editable="false"/>
                               <Label text="{i18n>selectedOptions}"/>
                               <Input value="{/selected_options}" editable="false"/>
                               <Label text="{i18n>price}"/>
                               <Input value="{/price}" editable="false"/>
                           </sap.ui.layout.form:content>
                           </sap.ui.layout.form:SimpleForm>
                       <Button text="{i18n>getPrice}" type="Accept" press="onPrice"/>
                       </content>
                   </Page>
               </pages>
           </App>
   </mvc:View>

   Do not forget to update your i18n file with the new labels!

   JavaScript Copy

basePrice=Base price selectedOptions=Selected options price=Price getPrice=Get pricing

    ![step-8-numeral-3-I18n](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/productconfiguration-ui5-app-create/step-8-numeral-3-I18n.png)

4. Next, go to the SAP API Business Hub, locate the `/api/v1/statelesspricing` method in the Pricing service, copy the JavaScript code and paste it in a new method `onPrice`.

    ![step-8-numeral-4-rest-API-pricing-service](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/productconfiguration-ui5-app-create/step-8-numeral-4-rest-API-pricing-service.png)

     

    ![step-8-numeral-4-post-pricing-service](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/productconfiguration-ui5-app-create/step-8-numeral-4-post-pricing-service.png)

    There are a lot of parameters in this API that you would fill out in a real-world application. But for this tutorial, hard code all values except for the `KOMP-VARCOND` attribute of the item 000010.
    Get the variant condition values from the configuration and assign them to the `KOMP-VARCOND` attribute in the request data.

    ```JavaScript
    var varCond = this._config.rootItem.characteristics.find(function (i) {
        return i.id === "CPS_VARCOND";
    });
    var varCondValues = [];
    for (var i = 0; i < varCond.values.length; i++) {
        varCondValues.push(varCond.values[i].value);
    }
    ```

    ```JavaScript
    var data = JSON.stringify({
                        "docCurrency": "EUR",
                        "locCurrency": "EUR",
                        "pricingProcedure": "ZPRC03",
                        "groupCondition": false,
                        "itemConditionsRequired": true,
                        "items": [
                            {
                            "itemId": "000010",
                            "externalId": "000010",
                            "quantity": {
                                "value": 1,
                                "unit": "PCE"
                            },
                            "grossWeight": {
                                "value": 0,
                                "unit": "KGM"
                            },
                            "netWeight": {
                                "value": 0,
                                "unit": "KGM"
                            },
                            "volume": {
                                "value": 0,
                                "unit": ""
                            },
                            "exchRateType": "M",
                            "exchRateDate": "2018-05-04",
                            "productDetails": {
                                "productId": "CPS_BURGER",
                                "baseUnit": "PCE",
                                "alternateProductUnits": [
                                {
                                    "alternateUnitName": "PCE",
                                    "numerator": 1,
                                    "denominator": 1
                                }
                                ]
                            },
                            "attributes": [
                                {
                                "name": "KOMK-HWAER",
                                "values": [
                                    "EUR"
                                ]
                                },
                                {
                                "name": "KOMK-KONDA",
                                "values": [
                                    "01"
                                ]
                                },
                                {
                                "name": "KOMK-KUNNR",
                                "values": [
                                    "0000010052"
                                ]
                                },
                                {
                                "name": "KOMK-PLTYP",
                                "values": [
                                    ""
                                ]
                                },
                                {
                                "name": "KOMK-VKORG",
                                "values": [
                                    "0001"
                                ]
                                },
                                {
                                "name": "KOMK-VTWEG",
                                "values": [
                                    "01"
                                ]
                                },
                                {
                                "name": "KOMK-WAERK",
                                "values": [
                                    "EUR"
                                ]
                                },
                                {
                                "name": "KOMP-KONDM",
                                "values": [
                                    ""
                                ]
                                },
                                {
                                "name": "KOMP-PMATN",
                                "values": [
                                    "CPS_BURGER"
                                ]
                                },
                                {
                                "name": "KOMP-PRSFD",
                                "values": [
                                    "X"
                                ]
                                },
                                {
                                "name": "KOMP-VARCOND",
                                "values": varCondValues
                                },
                                {
                                "name": "PRSFD",
                                "values": [
                                    "X"
                                ]
                                }
                            ],
                            "accessDateList": [
                                {
                                "name": "KOMK-PRSDT",
                                "value": "2018-05-04"
                                },
                                {
                                "name": "KOMK-FBUDA",
                                "value": "2018-05-04"
                                }
                            ],
                            "variantConditions": [],
                            "statistical": false
                            }]
           });
    ```

    ![step-8-numeral-4-onprice](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/productconfiguration-ui5-app-create/step-8-numeral-4-onprice.png)

    &nbsp;

    ![step-8-numeral-4-varCondValues](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/productconfiguration-ui5-app-create/step-8-numeral-4-varCondValues.png)

5. In the `xhr.addEventListener` function of the `onPrice` function, get the net value as well as the value of the condition purposes `ZSS1` and `ZSS2`, which in this test model means **Base Price** and **Selected** Options, and assign them to the JSON model.

    ```JavaScript
var jsonResults = JSON.parse(this.responseText);
self.getView().getModel().setProperty("/price", jsonResults.netValue);
self.getView().getModel().setProperty("/base_price", jsonResults.conditionsWithPurpose.find(function (i) {
    return i.purpose === "ZSS1";
}).value);
self.getView().getModel().setProperty("/selected_options", jsonResults.conditionsWithPurpose.find(function (i) {
    return i.purpose === "ZSS2";
}).value);

![step-8-numeral-5-jsonResults](https://raw.githubusercontent.com/sap-tutorials/Tutorials/master/tutorials/productconfiguration-ui5-app-create/step-8-numeral-5-jsonResults.png)

Make sure to remove `xhr.setRequestHeader("DataServiceVersion", "2.0");` and add **API Key**.

6. Run your application. The selected options and price values will change depending on the menu option you choose. The below result is excluding the External Conditions in the input for stateless pricing API. If the External Conditions are included then the results may vary.

   

Congratulations! You have successfully completed the tutorial. We hope that you find it useful and it helps you to start discovering our services.

In the example above, possible values of the characteristic are read at the end only from the knowledge base. List of possible values can change during runtime, therefore in a real world example possible values from configuration results must be considered.

The sandbox environment of the API Hub is used with an API key when calling the services. In the productive environment, OAuth authentication with client credentials would be used.

Finally, the configuration service is called without providing session context. For optimal performance and resource consumption, please ensure that the cookie retrieved with each configuration creation (implementation in the onInit event listener of the function in our example) is used when calling the other configuration service APIs for the same configuration session (functions onChange, readKB, and getConfig in our example).

JavaScript Copy

self.getView().getModel().setProperty("/cookie", this.getResponseHeader(“set-cookie”)); xhr.setRequestHeader(“Cookie”, this.getView().getModel().getProperty("/cookie"));

Please read the development guide (https://help.sap.com/viewer/f2b349b522ff40f0918e1e7ada320799/Cloud/en-US/98b0e7f7ba8d46f4976c884177daebdd.html) for more information about how to use the services.




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