Use old api to optimize photo rails

src/api.nim

@@ -49,9 +49,12 @@ proc getMediaTimeline*(id: string; after=""): Future[Timeline] {.async.} =
   let url = mediaTimeline / (id & ".json") ? genParams(cursor=after)
   result = parseTimeline(await fetch(url), after)
 
-proc getPhotoRail*(id: string): Future[PhotoRail] {.async.} =
-  let url = mediaTimeline / (id & ".json") ? genParams()
-  result = parsePhotoRail(await fetch(url))
+proc getPhotoRail*(name: string): Future[PhotoRail] {.async.} =
+  let
+    ps = genParams({"screen_name": name, "trim_user": "true"},
+                   count="18", ext=false)
+    url = photoRail ? ps
+  result = parsePhotoRail(await fetch(url, oldApi=true))
 
 proc getSearch*[T](query: Query; after=""): Future[Result[T]] {.async.} =
   when T is Profile:

src/apiutils.nim

@@ -4,13 +4,17 @@ import types, tokens, consts, parserutils
 
 const rl = "x-rate-limit-"
 
-proc genParams*(pars: openarray[(string, string)] = @[];
-                cursor=""): seq[(string, string)] =
+proc genParams*(pars: openarray[(string, string)] = @[]; cursor="";
+                count="20"; ext=true): seq[(string, string)] =
   result = timelineParams
   for p in pars:
     result &= p
+  if ext:
+    result &= ("ext", "mediaStats")
   if cursor.len > 0:
     result &= ("cursor", cursor)
+  if count.len > 0:
+    result &= ("count", count)
 
 proc genHeaders*(token: Token = nil): HttpHeaders =
   result = newHttpHeaders({
@@ -34,11 +38,11 @@ proc fetch*(url: Uri; oldApi=false): Future[JsonNode] {.async.} =
       resp = await client.get($url)
       body = await resp.body
 
-    if not body.startsWith('{'):
+    if body.startsWith('{') or body.startsWith('['):
+      result = parseJson(body)
+    else:
       echo resp.status, ": ", body
       result = newJNull()
-    else:
-      result = parseJson(body)
 
     if not oldApi and resp.headers.hasKey(rl & "limit"):
       token.remaining = parseInt(resp.headers[rl & "remaining"])

src/consts.nim

@@ -14,6 +14,7 @@ const
   listTimeline* = timelineApi / "list.json"
   listMembers* = api / "1.1/lists/members.json"
   userLookup* = api / "1.1/users/show.json"
+  photoRail* = api / "1.1/statuses/media_timeline.json"
   tweet* = timelineApi / "conversation"
   search* = api / "2/search/adaptive.json"
 
@@ -21,7 +22,7 @@ const
     "include_profile_interstitial_type": "0",
     "include_blocking": "0",
     "include_blocked_by": "0",
-    "include_followed_by": "1",
+    "include_followed_by": "0",
     "include_want_retweets": "0",
     "include_mute_edge": "0",
     "include_can_dm": "0",
@@ -39,8 +40,7 @@ const
     "include_ext_media_availability": "true",
     "send_error_codes": "true",
     "simple_quoted_tweet": "true",
-    "count": "20",
-    "ext": "mediaStats,highlightedLabel,cameraMoment",
+    "ext": "mediaStats",
     "include_quote_count": "true"
   }.toSeq
 

src/parser.nim

@@ -412,24 +412,14 @@ proc parseTimeline*(js: JsonNode; after=""): Timeline =
       result.bottom = e.getCursor
 
 proc parsePhotoRail*(js: JsonNode): PhotoRail =
+  for tweet in js:
     let
-    tweets = ? js{"globalObjects", "tweets"}
-    instructions = ? js{"timeline", "instructions"}
-
-  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
+      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 url.len == 0: continue
-      result.add GalleryPhoto(url: url, tweetId: $tweet.id)
+    result.add GalleryPhoto(url: url, tweetId: $t.id)

src/redis_cache.nim

@@ -54,8 +54,8 @@ proc setex(key: string; time: int; data: string) {.async.} =
 proc cache*(data: List) {.async.} =
   await setex(data.toKey, listCacheTime, compress(freeze(data)))
 
-proc cache*(data: PhotoRail; id: string) {.async.} =
-  await setex("pr:" & id, baseCacheTime, compress(freeze(data)))
+proc cache*(data: PhotoRail; name: string) {.async.} =
+  await setex("pr:" & name, baseCacheTime, compress(freeze(data)))
 
 proc cache*(data: Profile) {.async.} =
   if data.username.len == 0: return
@@ -94,14 +94,14 @@ proc getCachedProfile*(username: string; fetch=true;
     result = await getProfile(username)
     if cache: await cache(result)
 
-proc getCachedPhotoRail*(id: string): Future[PhotoRail] {.async.} =
-  if id.len == 0: return
-  let rail = await get("pr:" & toLower(id))
+proc getCachedPhotoRail*(name: string): Future[PhotoRail] {.async.} =
+  if name.len == 0: return
+  let rail = await get("pr:" & toLower(name))
   if rail != redisNil:
     uncompress(rail).thaw(result)
   else:
-    result = await getPhotoRail(id)
-    await cache(result, id)
+    result = await getPhotoRail(name)
+    await cache(result, name)
 
 proc getCachedList*(username=""; name=""; id=""): Future[List] {.async.} =
   let list = if id.len > 0: redisNil

src/routes/timeline.nim

@@ -46,7 +46,7 @@ proc fetchSingleTimeline*(after: string; query: Query; skipRail=false):
     rail = newFuture[PhotoRail]()
     rail.complete(@[])
   else:
-    rail = getCachedPhotoRail(profileId)
+    rail = getCachedPhotoRail(name)
 
   var timeline =
     case query.kind

src/views/renderutils.nim

@@ -87,7 +87,7 @@ proc genDate*(pref, state: string): VNode =
 
 proc genImg*(url: string; class=""): VNode =
   buildHtml():
-    img(src=getPicUrl(url), class=class, alt="Image")
+    img(src=getPicUrl(url), class=class, alt="")
 
 proc getTabClass*(query: Query; tab: QueryKind): string =
   result = "tab-item"