How do I use `io.ktor.application.call` in my cust...

# ktor

[aeruhxi]

How do I use io.ktor.application.call in my custom function without parametrizing it?

[cy]

Could you please clarify what exactly are you trying to achieve ?

[aeruhxi]

I have a function like

fun <A>Routing.paginate(call: ApplicationCall, collectionName: String, genericGet: (Int, Int) -> Pair<Int, List<A>>): Map<String, Any> {
    val page = call.parameters["page"]?.toInt() ?: 1
    val perPage = call.parameters["perPage"]?.toInt() ?: 10
    val (nPages, collection) = genericGet(page, perPage)

    val jsonMap = mutableMapOf<String, Any>(collectionName to collection)

    if (page > 1)
        jsonMap["prev"] = "/${collectionName}?page=${page - 1}"

    if (nPages > page)
        jsonMap["next"] = "/${collectionName}?page=${page + 1}"

    return jsonMap
}

I want to implicitly pass call inside it. Is there any way?

[everald]

just write the extension for the ApplicationCall instead of the not used Routing ?

[cy]

Why do you have receiver of type Routing ?

[cy]

yes, you can write it on ApplicationCall instead

[cy]

or PipelineContext<*, ApplicationCall>

[cy]

(in the second case you don't need to specify call. on call-site

[aeruhxi]

Thanks! That's what I wanted.

[cy]

private fun PipelineContext<*, ApplicationCall>.paginate(): Map<String, Any> {
    val param1 = call.request.queryParameters["...."]
    
    TODO()
}

private fun Routing.myAppComponent() {
    get("/table") {
        val myMap = paginate()
        // ....
        
        call.respond("....")
    }
}