src/main/kotlin/net/pterodactylus/sone/web/ajax/GetLinkedElementAjaxPage.kt

   1 package net.pterodactylus.sone.web.ajax
   2
   3 import com.fasterxml.jackson.databind.JsonNode
   4 import com.fasterxml.jackson.databind.ObjectMapper
   5 import net.pterodactylus.sone.core.ElementLoader
   6 import net.pterodactylus.sone.core.LinkedElement
   7 import net.pterodactylus.sone.template.LinkedElementRenderFilter
   8 import net.pterodactylus.sone.utils.jsonArray
   9 import net.pterodactylus.sone.utils.jsonObject
  10 import net.pterodactylus.sone.web.WebInterface
  11 import net.pterodactylus.sone.web.page.*
  12 import javax.inject.Inject
  13
  14 /**
  15  * Renders linked elements after they have been loaded.
  16  */
  17 @ToadletPath("getLinkedElement.ajax")
  18 class GetLinkedElementAjaxPage @Inject constructor(webInterface: WebInterface, private val elementLoader: ElementLoader, private val linkedElementRenderFilter: LinkedElementRenderFilter):
  19                 JsonPage(webInterface) {
  20
  21         override val needsFormPassword = false
  22         override val requiresLogin = false
  23
  24         override fun createJsonObject(request: FreenetRequest): JsonReturnObject =
  25                         request.httpRequest.getParam("elements", "[]").asJson()
  26                                         .map(JsonNode::asText)
  27                                         .map(elementLoader::loadElement)
  28                                         .filterNot { it.loading }
  29                                         .map { it to renderLinkedElement(it) }
  30                                         .let { elements ->
  31                                                 jsonArray(
  32                                                                 *(elements.map { element ->
  33                                                                         jsonObject {
  34                                                                                 put("link", element.first.link)
  35                                                                                 put("html", element.second)
  36                                                                         }
  37                                                                 }.toTypedArray())
  38                                                 )
  39                                         }.let { linkedElements ->
  40                                 createSuccessJsonObject().apply {
  41                                         put("linkedElements", linkedElements)
  42                                 }
  43                         }
  44
  45         private fun String.asJson() = ObjectMapper().readTree(this).asIterable()
  46
  47         private fun renderLinkedElement(linkedElement: LinkedElement) =
  48                         linkedElementRenderFilter.format(null, linkedElement, emptyMap())
  49
  50 }