296 lines
8.7 KiB
Nim
296 lines
8.7 KiB
Nim
# SPDX-License-Identifier: AGPL-3.0-only
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import std/[strutils, times, macros, htmlgen, options, algorithm, re]
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import std/unicode except strip
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import packedjson
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import types, utils, formatters
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let
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unRegex = re"(^|[^A-z0-9-_./?])@([A-z0-9_]{1,15})"
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unReplace = "$1<a href=\"/$2\">@$2</a>"
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htRegex = re"(^|[^\w-_./?])([#$]|＃)([\w_]+)"
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htReplace = "$1<a href=\"/search?q=%23$3\">$2$3</a>"
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type
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ReplaceSliceKind = enum
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rkRemove, rkUrl, rkHashtag, rkMention
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ReplaceSlice = object
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slice: Slice[int]
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kind: ReplaceSliceKind
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url, display: string
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template isNull*(js: JsonNode): bool = js.kind == JNull
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template notNull*(js: JsonNode): bool = js.kind != JNull
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template `?`*(js: JsonNode): untyped =
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let j = js
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if j.isNull: return
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j
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template `with`*(ident, value, body): untyped =
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block:
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let ident {.inject.} = value
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if ident != nil: body
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template `with`*(ident; value: JsonNode; body): untyped =
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block:
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let ident {.inject.} = value
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if value.notNull: body
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template getCursor*(js: JsonNode): string =
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js{"content", "operation", "cursor", "value"}.getStr
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template getError*(js: JsonNode): Error =
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if js.kind != JArray or js.len == 0: null
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else: Error(js[0]{"code"}.getInt)
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template parseTime(time: string; f: static string; flen: int): DateTime =
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if time.len != flen: return
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parse(time, f, utc())
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proc getDateTime*(js: JsonNode): DateTime =
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parseTime(js.getStr, "yyyy-MM-dd\'T\'HH:mm:ss\'Z\'", 20)
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proc getTime*(js: JsonNode): DateTime =
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parseTime(js.getStr, "ddd MMM dd hh:mm:ss \'+0000\' yyyy", 30)
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proc getId*(id: string): string {.inline.} =
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let start = id.rfind("-")
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if start < 0: return id
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id[start + 1 ..< id.len]
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proc getId*(js: JsonNode): int64 {.inline.} =
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case js.kind
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of JString: return parseBiggestInt(js.getStr("0"))
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of JInt: return js.getBiggestInt()
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else: return 0
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proc getEntryId*(js: JsonNode): string {.inline.} =
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let entry = js{"entryId"}.getStr
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if entry.len == 0: return
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if "tweet" in entry or "sq-I-t" in entry:
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return entry.getId
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elif "tombstone" in entry:
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return js{"content", "item", "content", "tombstone", "tweet", "id"}.getStr
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else:
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echo "unknown entry: ", entry
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return
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template getStrVal*(js: JsonNode; default=""): string =
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js{"string_value"}.getStr(default)
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proc getImageStr*(js: JsonNode): string =
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result = js.getStr
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result.removePrefix(https)
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result.removePrefix(twimg)
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template getImageVal*(js: JsonNode): string =
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js{"image_value", "url"}.getImageStr
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proc getCardUrl*(js: JsonNode; kind: CardKind): string =
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result = js{"website_url"}.getStrVal
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if kind == promoVideoConvo:
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result = js{"thank_you_url"}.getStrVal(result)
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if result.startsWith("card://"):
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result = ""
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proc getCardDomain*(js: JsonNode; kind: CardKind): string =
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result = js{"vanity_url"}.getStrVal(js{"domain"}.getStr)
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if kind == promoVideoConvo:
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result = js{"thank_you_vanity_url"}.getStrVal(result)
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proc getCardTitle*(js: JsonNode; kind: CardKind): string =
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result = js{"title"}.getStrVal
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if kind == promoVideoConvo:
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result = js{"thank_you_text"}.getStrVal(result)
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elif kind == liveEvent:
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result = js{"event_category"}.getStrVal
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elif kind in {videoDirectMessage, imageDirectMessage}:
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result = js{"cta1"}.getStrVal
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proc getBanner*(js: JsonNode): string =
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let url = js{"profile_banner_url"}.getImageStr
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if url.len > 0:
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return url & "/1500x500"
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let color = js{"profile_link_color"}.getStr
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if color.len > 0:
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return '#' & color
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# use primary color from profile picture color histogram
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with p, js{"profile_image_extensions", "mediaColor", "r", "ok", "palette"}:
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if p.len > 0:
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let pal = p[0]{"rgb"}
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result = "#"
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result.add toHex(pal{"red"}.getInt, 2)
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result.add toHex(pal{"green"}.getInt, 2)
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result.add toHex(pal{"blue"}.getInt, 2)
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return
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proc getTombstone*(js: JsonNode): string =
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result = js{"tombstoneInfo", "richText", "text"}.getStr
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result.removeSuffix(" Learn more")
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proc getSource*(js: JsonNode): string =
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let src = js{"source"}.getStr
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result = src.substr(src.find('>') + 1, src.rfind('<') - 1)
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proc getMp4Resolution*(url: string): int =
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# parses the height out of a URL like this one:
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# https://video.twimg.com/ext_tw_video/<tweet-id>/pu/vid/720x1280/<random>.mp4
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const vidSep = "/vid/"
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let
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vidIdx = url.find(vidSep) + vidSep.len
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resIdx = url.find('x', vidIdx) + 1
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res = url[resIdx ..< url.find("/", resIdx)]
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try:
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return parseInt(res)
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except ValueError:
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# cannot determine resolution (e.g. m3u8/non-mp4 video)
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return 0
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proc extractSlice(js: JsonNode): Slice[int] =
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result = js["indices"][0].getInt ..< js["indices"][1].getInt
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proc extractUrls(result: var seq[ReplaceSlice]; js: JsonNode;
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textLen: int; hideTwitter = false) =
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let
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url = js["expanded_url"].getStr
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slice = js.extractSlice
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if hideTwitter and slice.b.succ >= textLen and url.isTwitterUrl:
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if slice.a < textLen:
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result.add ReplaceSlice(kind: rkRemove, slice: slice)
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else:
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result.add ReplaceSlice(kind: rkUrl, url: url,
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display: url.shortLink, slice: slice)
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proc extractHashtags(result: var seq[ReplaceSlice]; js: JsonNode) =
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result.add ReplaceSlice(kind: rkHashtag, slice: js.extractSlice)
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proc replacedWith(runes: seq[Rune]; repls: openArray[ReplaceSlice];
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textSlice: Slice[int]): string =
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template extractLowerBound(i: int; idx): int =
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if i > 0: repls[idx].slice.b.succ else: textSlice.a
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result = newStringOfCap(runes.len)
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for i, rep in repls:
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result.add $runes[extractLowerBound(i, i - 1) ..< rep.slice.a]
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case rep.kind
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of rkHashtag:
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let
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name = $runes[rep.slice.a.succ .. rep.slice.b]
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symbol = $runes[rep.slice.a]
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result.add a(symbol & name, href = "/search?q=%23" & name)
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of rkMention:
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result.add a($runes[rep.slice], href = rep.url, title = rep.display)
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of rkUrl:
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result.add a(rep.display, href = rep.url)
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of rkRemove:
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discard
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let rest = extractLowerBound(repls.len, ^1) ..< textSlice.b
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if rest.a <= rest.b:
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result.add $runes[rest]
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proc deduplicate(s: var seq[ReplaceSlice]) =
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var
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len = s.len
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i = 0
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while i < len:
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var j = i + 1
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while j < len:
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if s[i].slice.a == s[j].slice.a:
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s.del j
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dec len
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else:
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inc j
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inc i
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proc cmp(x, y: ReplaceSlice): int = cmp(x.slice.a, y.slice.b)
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proc expandUserEntities*(user: var User; js: JsonNode) =
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let
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orig = user.bio.toRunes
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ent = ? js{"entities"}
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with urls, ent{"url", "urls"}:
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user.website = urls[0]{"expanded_url"}.getStr
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var replacements = newSeq[ReplaceSlice]()
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with urls, ent{"description", "urls"}:
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for u in urls:
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replacements.extractUrls(u, orig.high)
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replacements.deduplicate
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replacements.sort(cmp)
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user.bio = orig.replacedWith(replacements, 0 .. orig.len)
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user.bio = user.bio.replacef(unRegex, unReplace)
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.replacef(htRegex, htReplace)
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proc expandTweetEntities*(tweet: Tweet; js: JsonNode) =
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let
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orig = tweet.text.toRunes
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textRange = js{"display_text_range"}
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textSlice = textRange{0}.getInt .. textRange{1}.getInt
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hasQuote = js{"is_quote_status"}.getBool
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hasCard = tweet.card.isSome
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var replyTo = ""
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if tweet.replyId != 0:
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with reply, js{"in_reply_to_screen_name"}:
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tweet.reply.add reply.getStr
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replyTo = reply.getStr
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let ent = ? js{"entities"}
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var replacements = newSeq[ReplaceSlice]()
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with urls, ent{"urls"}:
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for u in urls:
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let urlStr = u["url"].getStr
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if urlStr.len == 0 or urlStr notin tweet.text:
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continue
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replacements.extractUrls(u, textSlice.b, hideTwitter = hasQuote)
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if hasCard and u{"url"}.getStr == get(tweet.card).url:
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get(tweet.card).url = u{"expanded_url"}.getStr
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with media, ent{"media"}:
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for m in media:
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replacements.extractUrls(m, textSlice.b, hideTwitter = true)
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if "hashtags" in ent:
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for hashtag in ent["hashtags"]:
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replacements.extractHashtags(hashtag)
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if "symbols" in ent:
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for symbol in ent["symbols"]:
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replacements.extractHashtags(symbol)
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if "user_mentions" in ent:
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for mention in ent["user_mentions"]:
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let
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name = mention{"screen_name"}.getStr
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slice = mention.extractSlice
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idx = tweet.reply.find(name)
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if slice.a >= textSlice.a:
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replacements.add ReplaceSlice(kind: rkMention, slice: slice,
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url: "/" & name, display: mention["name"].getStr)
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if idx > -1 and name != replyTo:
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tweet.reply.delete idx
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elif idx == -1 and tweet.replyId != 0:
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tweet.reply.add name
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replacements.deduplicate
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replacements.sort(cmp)
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tweet.text = orig.replacedWith(replacements, textSlice)
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.strip(leading=false)
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