nitter/src/parser.nim

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Nim
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2020-06-01 00:16:24 +00:00
import json, strutils, options, tables, times, math
import types, parserutils
proc parseProfile(js: JsonNode; id=""): Profile =
if js == nil: return
result = Profile(
id: if id.len > 0: id else: js{"id_str"}.getStr,
username: js{"screen_name"}.getStr,
fullname: js{"name"}.getStr,
location: js{"location"}.getStr,
bio: js{"description"}.getStr,
userpic: js{"profile_image_url_https"}.getStr.replace("_normal", ""),
banner: js.getBanner,
following: $js{"friends_count"}.getInt,
followers: $js{"followers_count"}.getInt,
tweets: $js{"statuses_count"}.getInt,
likes: $js{"favourites_count"}.getInt,
media: $js{"media_count"}.getInt,
verified: js{"verified"}.getBool,
protected: js{"protected"}.getBool,
joinDate: js{"created_at"}.getTime
)
result.expandProfileEntities(js)
proc parseGraphProfile*(js: JsonNode; username: string): Profile =
with errors, js{"errors"}:
for error in errors:
case Error(error{"code"}.getInt)
of notFound: return Profile(username: username)
of suspended: return Profile(username: username, suspended: true)
else: discard
let user = js{"data", "user", "legacy"}
let id = js{"data", "user", "rest_id"}.getStr
parseProfile(user, id)
proc parseGraphList*(js: JsonNode): List =
if js == nil: return
var list = js{"data", "user_by_screen_name", "list"}
if list == nil:
list = js{"data", "list"}
if list == nil:
return
result = List(
id: list{"id_str"}.getStr,
name: list{"name"}.getStr,
username: list{"user", "legacy", "screen_name"}.getStr,
userId: list{"user", "legacy", "id_str"}.getStr,
description: list{"description"}.getStr,
members: list{"member_count"}.getInt,
banner: list{"custom_banner_media", "media_info", "url"}.getStr
)
proc parseListMembers*(js: JsonNode; cursor: string): Result[Profile] =
result = Result[Profile](
beginning: cursor.len == 0,
query: Query(kind: userList)
)
if js == nil: return
result.top = js{"previous_cursor_str"}.getStr
result.bottom = js{"next_cursor_str"}.getStr
if result.bottom.len == 1:
result.bottom.setLen 0
for u in js{"users"}:
result.content.add parseProfile(u)
proc parsePoll(js: JsonNode): Poll =
let vals = js{"binding_values"}
# name format is pollNchoice_*
for i in '1' .. js{"name"}.getStr[4]:
let choice = "choice" & i
result.values.add parseInt(vals{choice & "_count"}.getStrVal("0"))
result.options.add vals{choice & "_label"}.getStrVal
let time = vals{"end_datetime_utc", "string_value"}.getDateTime
if time > getTime():
let timeLeft = $(time - getTime())
result.status = timeLeft[0 ..< timeLeft.find(",")]
else:
result.status = "Final results"
result.leader = result.values.find(max(result.values))
result.votes = result.values.sum
proc parseGif(js: JsonNode): Gif =
Gif(
url: js{"video_info", "variants"}[0]{"url"}.getStr,
thumb: js{"media_url_https"}.getStr
)
proc parseVideo(js: JsonNode): Video =
result = Video(
videoId: js{"id_str"}.getStr,
thumb: js{"media_url_https"}.getStr,
views: js{"ext", "mediaStats", "r", "ok", "viewCount"}.getStr,
available: js{"ext_media_availability", "status"}.getStr == "available",
title: js{"ext_alt_text"}.getStr,
durationMs: js{"duration_millis"}.getInt
)
for v in js{"video_info", "variants"}:
result.variants.add VideoVariant(
videoType: v{"content_type"}.to(VideoType),
bitrate: v{"bitrate"}.getInt,
url: v{"url"}.getStr
)
proc parsePromoVideo(js: JsonNode): Video =
result = Video(
videoId: js{"player_content_id"}.getStrVal(js{"card_id"}.getStrVal),
thumb: js{"player_image_large", "image_value", "url"}.getStr,
available: true,
durationMs: js{"content_duration_seconds"}.getStrVal("0").parseInt * 1000,
)
var variant = VideoVariant(
videoType: m3u8,
url: js{"player_hls_url"}.getStrVal(js{"player_stream_url"}.getStrVal)
)
if "vmap" in variant.url:
variant.videoType = vmap
result.playbackType = vmap
result.variants.add variant
proc parseBroadcast(js: JsonNode): Card =
let image = js{"broadcast_thumbnail_large", "image_value", "url"}.getStr
result = Card(
kind: broadcast,
url: js{"broadcast_url"}.getStrVal,
title: js{"broadcaster_display_name"}.getStrVal,
text: js{"broadcast_title"}.getStrVal,
image: image,
video: some Video(videoId: js{"broadcast_media_id"}.getStrVal, thumb: image)
)
proc parseCard(js: JsonNode; urls: JsonNode): Card =
const imageTypes = ["photo_image_full_size", "summary_photo_image",
"thumbnail_image", "promo_image", "player_image"]
let
vals = ? js{"binding_values"}
name = js{"name"}.getStr
kind = parseEnum[CardKind](name[(name.find(":") + 1) ..< name.len])
result = Card(
kind: kind,
url: vals.getCardUrl(kind),
dest: vals.getCardDomain(kind),
title: vals.getCardTitle(kind),
text: vals{"description"}.getStrVal
)
if result.url.len == 0:
result.url = js{"url"}.getStr
case kind
of promoVideo, promoVideoConvo:
result.video = some parsePromoVideo(vals)
of broadcast:
result = parseBroadcast(vals)
of player:
result.url = vals{"player_url"}.getStrVal
if "youtube.com" in result.url:
result.url = result.url.replace("/embed/", "/watch?v=")
else: discard
for typ in imageTypes:
with img, vals{typ & "_large"}:
result.image = img{"image_value", "url"}.getStr
break
for u in ? urls:
if u{"url"}.getStr == result.url:
result.url = u{"expanded_url"}.getStr
break
proc parseTweet(js: JsonNode): Tweet =
if js == nil: return
result = Tweet(
id: js{"id_str"}.getId,
threadId: js{"conversation_id_str"}.getId,
replyId: js{"in_reply_to_status_id_str"}.getId,
text: js{"full_text"}.getStr,
time: js{"created_at"}.getTime,
hasThread: js{"self_thread"} != nil,
available: true,
profile: Profile(id: js{"user_id_str"}.getStr),
stats: TweetStats(
replies: js{"reply_count"}.getInt,
retweets: js{"retweet_count"}.getInt,
likes: js{"favorite_count"}.getInt,
)
)
result.expandTweetEntities(js)
if js{"is_quote_status"}.getBool:
result.quote = some Tweet(id: js{"quoted_status_id_str"}.getId)
with rt, js{"retweeted_status_id_str"}:
result.retweet = some Tweet(id: rt.getId)
return
with jsCard, js{"card"}:
let name = jsCard{"name"}.getStr
if "poll" in name:
if "image" in name:
result.photos.add jsCard{"binding_values", "image_large", "image_value", "url"}.getStr
result.poll = some parsePoll(jsCard)
else:
result.card = some parseCard(jsCard, js{"entities", "urls"})
with jsMedia, js{"extended_entities", "media"}:
for m in jsMedia:
case m{"type"}.getStr
of "photo":
result.photos.add m{"media_url_https"}.getStr
of "video":
result.video = some(parseVideo(m))
of "animated_gif":
result.gif = some(parseGif(m))
else: discard
proc finalizeTweet(global: GlobalObjects; id: string): Tweet =
let intId = if id.len > 0: parseInt(id) else: 0
result = global.tweets.getOrDefault(id, Tweet(id: intId))
if result.quote.isSome:
let quote = get(result.quote).id
if $quote in global.tweets:
result.quote = some global.tweets[$quote]
else:
result.quote = some Tweet()
if result.retweet.isSome:
let rt = get(result.retweet).id
if $rt in global.tweets:
result.retweet = some finalizeTweet(global, $rt)
else:
result.retweet = some Tweet()
proc parsePin(js: JsonNode; global: GlobalObjects): Tweet =
let pin = js{"pinEntry", "entry", "entryId"}.getStr
if pin.len == 0: return
let id = pin.getId
if id notin global.tweets: return
global.tweets[id].pinned = true
return finalizeTweet(global, id)
proc parseGlobalObjects(js: JsonNode): GlobalObjects =
result = GlobalObjects()
let
tweets = ? js{"globalObjects", "tweets"}
users = ? js{"globalObjects", "users"}
for k, v in users:
result.users[k] = parseProfile(v, k)
for k, v in tweets:
var tweet = parseTweet(v)
if tweet.profile.id in result.users:
tweet.profile = result.users[tweet.profile.id]
result.tweets[k] = tweet
proc parseThread(js: JsonNode; global: GlobalObjects): tuple[thread: Chain, self: bool] =
result.thread = Chain()
for t in js{"content", "timelineModule", "items"}:
let content = t{"item", "content"}
if "Self" in content{"tweet", "displayType"}.getStr:
result.self = true
let entry = t{"entryId"}.getStr
if "show_more" in entry:
let
cursor = content{"timelineCursor"}
more = cursor{"displayTreatment", "actionText"}.getStr
result.thread.more = parseInt(more[0 ..< more.find(" ")])
result.thread.cursor = cursor{"value"}.getStr
else:
var tweet = finalizeTweet(global, entry.getId)
if not tweet.available:
tweet.tombstone = getTombstone(content{"tombstone"})
result.thread.content.add tweet
proc parseConversation*(js: JsonNode; tweetId: string): Conversation =
result = Conversation(replies: Result[Chain](beginning: true))
let global = parseGlobalObjects(? js)
let instructions = ? js{"timeline", "instructions"}
for e in instructions[0]{"addEntries", "entries"}:
let entry = e{"entryId"}.getStr
if "tweet" in entry:
let tweet = finalizeTweet(global, entry.getId)
if $tweet.id != tweetId:
result.before.content.add tweet
else:
result.tweet = tweet
elif "conversationThread" in entry:
let (thread, self) = parseThread(e, global)
if thread.content.len > 0:
if self:
result.after = thread
else:
result.replies.content.add thread
elif "cursor-showMore" in entry:
result.replies.bottom = e.getCursor
elif "cursor-bottom" in entry:
result.replies.bottom = e.getCursor
proc parseUsers*(js: JsonNode; after=""): Result[Profile] =
result = Result[Profile](beginning: after.len == 0)
let global = parseGlobalObjects(? js)
let instructions = ? js{"timeline", "instructions"}
for e in instructions[0]{"addEntries", "entries"}:
let entry = e{"entryId"}.getStr
if "sq-I-u" in entry:
let id = entry.getId
if id in global.users:
result.content.add global.users[id]
elif "cursor-top" in entry:
result.top = e.getCursor
elif "cursor-bottom" in entry:
result.bottom = e.getCursor
proc parseTimeline*(js: JsonNode; after=""): Timeline =
result = Timeline(beginning: after.len == 0)
let global = parseGlobalObjects(? js)
let instructions = ? js{"timeline", "instructions"}
if instructions.len == 0: return
for i in instructions:
if result.beginning and i{"pinEntry"} != nil:
with pin, parsePin(i, global):
result.content.add pin
else:
# This is necessary for search
with r, i{"replaceEntry", "entry"}:
if "top" in r{"entryId"}.getStr:
result.top = r.getCursor
elif "bottom" in r{"entryId"}.getStr:
result.bottom = r.getCursor
for e in instructions[0]{"addEntries", "entries"}:
let entry = e{"entryId"}.getStr
if "tweet" in entry or "sq-I-t" in entry:
let tweet = finalizeTweet(global, entry.getId)
if not tweet.available: continue
result.content.add tweet
elif "cursor-top" in entry:
result.top = e.getCursor
elif "cursor-bottom" in entry:
result.bottom = e.getCursor
proc parsePhotoRail*(tl: Timeline): PhotoRail =
for tweet in tl.content:
if result.len == 16: break
let 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,
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color: "#161616"
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)