How to modify items returned from a Service and mapped using a mapper?

[Brian Hayward]

I am writing an app where a user can search an online list of items and optionally select individual ones to add to the local database.

When searching, I want to offer a visual indicator that something in their search is already in their local DB.

Other ideas are welcome, but I'm trying to implement this with a checkbox on the search results that are returned.

I've highlighted the section I am trying to get to work in yellow.  It doesn't seem like we can add logic like that within a list block, so are there any suggestions on another way I could accomplish this?

module searchitems

import mobl::ui::generic

import model

control searchitems()

{

        header("Find Items")

        var phrase = "ba"

        var searchResult = async(Items.search(phrase))

        searchBox(phrase, onsearch={searchResult = Items.search(phrase);})

  whenLoaded(searchResult)

  {

    group {

      list(it in searchResult) {

        // if item is in my local list of items, set it.selected = true

        //     else set it.selected = false

        if(localItem(it))

        {

                it.selected = true;

        }

        item {

                checkBox(it.selected, it.name + ":" + it.id, {addLocalItem(it);})

        }

      }

    }

  }

}

service Items {

        resource search(query: String) : [SearchItem] {

        uri="http://sample.org/search?searchText=" + query

                encoding="json"

                mapper = searchItemMapper

        }

}

function searchItemMapper (json : JSON) : [SearchItem] {

        return json.results;

}

function addLocalItem(it : SearchItem)

{

        // Will eventually add or remove from DB..

        if (!it.selected)

        {

          alert ("Removing Item: " + it.name);

        }

        else

        {

          alert ("Adding Item: " + it.name);

        }

}

function localItem(it : SearchItem) : Bool

{

        // Stubbed out for now, will eventually check the local DB to see if the item already exists there.

        return true;

}

[Zef Hemel]

It's hacky, but you can put a script { ... } block within a list, and put your if statement within that:

script {

 // if item is in my local list of items, set it.selected = true

        //     else set it.selected = false

        if(localItem(it))

        {

                it.selected = true;

        }

}

-- Zef

[Brian Hayward]

Thanks Zef, that took care of it!

--

Brian