convert game gifs to game embeds in ublog

modules/common/src/main/Form.scala

@@ -132,7 +132,8 @@ object Form {
         "githubusercontent.com",
         "googleusercontent.com",
         "i.ibb.co",
-        "i.postimg.cc"
+        "i.postimg.cc",
+        "lichess1.org"
       )
     private val imageDomainRegex = """^(?:https?://)([^/]+)/.{6,}""".r
     sealed abstract private class Bad(val msg: String)

modules/ublog/src/main/Env.scala

@@ -14,7 +14,8 @@ final class Env(
     ircApi: lila.irc.IrcApi,
     relationApi: lila.relation.RelationApi,
     captcher: lila.hub.actors.Captcher,
-    cacheApi: lila.memo.CacheApi
+    cacheApi: lila.memo.CacheApi,
+    net: NetConfig
 )(implicit
     ec: scala.concurrent.ExecutionContext
 ) {

modules/ublog/src/main/UblogMarkup.scala

@@ -2,8 +2,9 @@ package lila.ublog
 
 import scala.concurrent.duration._
 import lila.common.Chronometer
+import lila.common.config.NetConfig
 
-final class UblogMarkup {
+final class UblogMarkup(net: NetConfig) {
 
   private val renderer =
     new lila.common.Markdown(
@@ -16,10 +17,18 @@ final class UblogMarkup {
       table = true
     )
 
+  def apply(post: UblogPost): String =
+    cache.get(post.markdown, str => renderer(s"ublog:${post.id}")(replaceGameGifs(str)))
+
   private val cache = lila.memo.CacheApi.scaffeineNoScheduler
     .expireAfterAccess(20 minutes)
     .maximumSize(1024)
     .build[String, String]()
 
-  def apply(post: UblogPost): String = cache.get(post.markdown, renderer(s"ublog:${post.id}"))
+  private object replaceGameGifs {
+    val regex = {
+      """!\[[^\]]*\]\(""" + net.assetBaseUrl + """/game/export/gif/(white|black)/(\w{8}).gif\)"""
+    }.r
+    def apply(markdown: String) = regex.replaceAllIn(markdown, net.baseUrl.value + "/$2/$1")
+  }
 }