A formatter function has a single parameter, which is the value which needs to be formatted to an external representation. A formatter function can be used not only to format a value, but also to do type conversion or calculate results from a given value.
Refer to /webapp/model/formatter.js
The module exports an object with a single method myStatusText that takes a string parameter sStatus. The method returns a string value based on the input parameter sStatus.
The oResourceBundle variable is assigned the value of the i18n model's resource bundle. The getResourceBundle() method is called on the i18n model, which is obtained from the OwnerComponent of the current view. The getText() method is called on the oResourceBundle object to retrieve the text associated with the given key.
The switch statement is used to determine the value of the sStatus parameter and return the corresponding text from the resource bundle. If the value of sStatus is not "A", "B", or "C", then the value of sStatus is returned as is.
This code is used to define a reusable function that can be called from any other module in the application. It is a good practice to define such functions in a separate module to keep the code organized and modular.
Refer to /webapp/controller/InvoicesList.controller.js
The formatter property of the controller is set to the formatter object that is imported from the ../model/formatter module. This object contains the formatter functions that are used to format the data in the view.
Refer to /webapp/view/InvoicesList.view.xml
The ObjectListItem control is used to display each invoice as a list item. The firstStatus aggregation of the ObjectListItem control is used to display the status of the invoice.
The ObjectStatus control is used to display the status text of the invoice. The text property of the ObjectStatus control is bound to the Status property of the invoice model using the path property. The formatter property is used to specify the name of the formatter function that is used to format the status text.
The formatter function is defined in the formatter.js file of the application. The formatter.myStatusText function is called to format the status text. The myStatusText function takes the Status property of the invoice model as input and returns the corresponding text from the resource bundle.
In summary, the code you provided is used to display a list of invoices with their status text formatted using a formatter function.
