Modules integration about viperit

[ferranabello]

Hey @BorysShcherbyna,
let's say you have a parent module which has a child module, this child module needs some data to load properly. This child module is some kind of selector. The user will tap into something and you want to know what is it that the user selected.

To do that you could do something like this:

final class ParentRouter: Router {
    func showParentModule(from: UIViewController, withData: Any) {
        show(from: from, embedInNavController: true, setupData: withData)
    }
    
    func showChildModule(withData: Any, onSelect: @escaping (String) -> Void) {
        let myChild = AppModules.child.build()
        let childRouter = myChild.router as! ChildRouter
        childRouter.showChild(ofParent: _view, insideContainer: _view.view, withData: "Show this", onSelection: onSelect)
    }
}

final class ParentPresenter: Presenter {
    var childData: String!
    
    override func setupView(data: Any) {
        //Do whatever you need to setup and save it
        childData = data as! String
    }
    
    override func viewHasLoaded() {
        super.viewHasLoaded()
        
        //Now we are ready to show the child
        router.showChildModule(withData: childData) { selectedValue in
            //COOL! Now I can use the value coming from my child module in the parent module!
        }
    }
}

final class ChildRouter: Router {
    private var executeIHaveSelectedSomeString: ((String) -> Void)!
    
    func showChild(ofParent: UIViewController, insideContainer: UIView, withData: Any, onSelection: @escaping (String) -> Void) {
        show(from: ofParent, insideView: insideContainer, setupData: withData)
        executeIHaveSelectedSomeString = onSelection
    }
    
    func iHaveSelected(theValue: String) {
        executeIHaveSelectedSomeString(theValue)
    }
}

You could go with other solutions, using Rx observables instead of closures but I think you get the point.

Cheers!

[ferranabello]

HI @BorysShcherbyna,
I think the best way to do integrations of parent/child is to do it on a router function. Viperit has one convenience method to do so in the Router:

func show(from containerView: UIViewController, insideView targetView: UIView, setupData: Any?)

Anyway, this is just an example. Viperit gives you the opportunity to implement this as you want.

Cheers!

[BorysShcherbyna]

Thank you for pointing to Router!

This is my assumption on module integration:

let parentModule = AppModules.parent.build()
let parentPresenter = parentModule.presenter as! ParentPresenter
let parentView = parentModule.view as! ParentView

let childModule = AppViewModules.profileHeader.build()
let childPresenter = childModule.presenter as! ChildPresenter

//next two lines are for establishing communication between modules
parentPresenter.childPresenter = childPresenter 
childPresenter.delegate = parentPresenter

profileHeaderModule.router.show(from: parentPresenter.view, insideView: parentView.headerView, setupData: dataToPass)

parentPresenter.router.show(from: _view, setupData: dataToPass)

What do you think about such module integration? And what is your suggestion for communication between modules?

Thanks!