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.FreenetRequest
  12
  13 /**
  14  * Renders linked elements after they have been loaded.
  15  */
  16 class GetLinkedElementAjaxPage(webInterface: WebInterface, private val elementLoader: ElementLoader, private val linkedElementRenderFilter: LinkedElementRenderFilter):
  17                 JsonPage("getLinkedElement.ajax", webInterface) {
  18
  19         override val needsFormPassword = false
  20
  21         override fun createJsonObject(request: FreenetRequest): JsonReturnObject =
  22                         request.httpRequest.getParam("elements", "[]").asJson()
  23                                         .map(JsonNode::asText)
  24                                         .map(elementLoader::loadElement)
  25                                         .filterNot { it.loading }
  26                                         .map { it to renderLinkedElement(it) }
  27                                         .let { elements ->
  28                                                 jsonArray(
  29                                                                 *(elements.map { element ->
  30                                                                         jsonObject {
  31                                                                                 put("link", element.first.link)
  32                                                                                 put("html", element.second)
  33                                                                         }
  34                                                                 }.toTypedArray())
  35                                                 )
  36                                         }.let { linkedElements ->
  37                                 createSuccessJsonObject().apply {
  38                                         put("linkedElements", linkedElements)
  39                                 }
  40                         }
  41
  42         override fun requiresLogin() = false
  43
  44         private fun String.asJson() = ObjectMapper().readTree(this).asIterable()
  45
  46         private fun renderLinkedElement(linkedElement: LinkedElement) =
  47                         linkedElementRenderFilter.format(null, linkedElement, emptyMap())
  48
  49 }