Use old api to optimize photo rails

src/parser.nim

@@ -412,24 +412,14 @@ proc parseTimeline*(js: JsonNode; after=""): Timeline =
       result.bottom = e.getCursor
 
 proc parsePhotoRail*(js: JsonNode): PhotoRail =
-  let
-    tweets = ? js{"globalObjects", "tweets"}
-    instructions = ? js{"timeline", "instructions"}
+  for tweet in js:
+    let
+      t = parseTweet(tweet)
+      url = if t.photos.len > 0: t.photos[0]
+            elif t.video.isSome: get(t.video).thumb
+            elif t.gif.isSome: get(t.gif).thumb
+            elif t.card.isSome: get(t.card).image
+            else: ""
 
-  if instructions.len == 0 or tweets.len == 0: return
-
-  for e in instructions[0]{"addEntries", "entries"}:
-    if result.len == 16: break
-    let entry = e{"entryId"}.getStr
-    if "tweet" in entry:
-      let id = entry.getId
-      if id notin tweets: continue
-      let tweet = parseTweet(tweets{id})
-      var url = if tweet.photos.len > 0: tweet.photos[0]
-                elif tweet.video.isSome: get(tweet.video).thumb
-                elif tweet.gif.isSome: get(tweet.gif).thumb
-                elif tweet.card.isSome: get(tweet.card).image
-                else: ""
-
-      if url.len == 0: continue
-      result.add GalleryPhoto(url: url, tweetId: $tweet.id)
+    if url.len == 0: continue
+    result.add GalleryPhoto(url: url, tweetId: $t.id)