git.squeep.com Git - akkoma/blob - lib/pleroma/formatter.ex

   1 defmodule Pleroma.Formatter do
   2   alias Pleroma.User
   3   alias Pleroma.Web.MediaProxy
   4   alias Pleroma.HTML
   5   alias Pleroma.Emoji
   6
   7   @tag_regex ~r/\#\w+/u
   8   def parse_tags(text, data \\ %{}) do
   9     Regex.scan(@tag_regex, text)
  10     |> Enum.map(fn ["#" <> tag = full_tag] -> {full_tag, String.downcase(tag)} end)
  11     |> (fn map ->
  12           if data["sensitive"] in [true, "True", "true", "1"],
  13             do: [{"#nsfw", "nsfw"}] ++ map,
  14             else: map
  15         end).()
  16   end
  17
  18   def parse_mentions(text) do
  19     # Modified from https://www.w3.org/TR/html5/forms.html#valid-e-mail-address
  20     regex =
  21       ~r/@[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]*@?[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*/u
  22
  23     Regex.scan(regex, text)
  24     |> List.flatten()
  25     |> Enum.uniq()
  26     |> Enum.map(fn "@" <> match = full_match ->
  27       {full_match, User.get_cached_by_nickname(match)}
  28     end)
  29     |> Enum.filter(fn {_match, user} -> user end)
  30   end
  31
  32   @instance Application.get_env(:pleroma, :instance)
  33
  34   def emojify(text) do
  35     emojify(text, Emoji.get_all())
  36   end
  37
  38   def emojify(text, nil), do: text
  39
  40   def emojify(text, emoji) do
  41     Enum.reduce(emoji, text, fn {emoji, file}, text ->
  42       emoji = HTML.strip_tags(emoji)
  43       file = HTML.strip_tags(file)
  44
  45       String.replace(
  46         text,
  47         ":#{emoji}:",
  48         "<img height='32px' width='32px' alt='#{emoji}' title='#{emoji}' src='#{
  49           MediaProxy.url(file)
  50         }' />"
  51       )
  52       |> HTML.filter_tags()
  53     end)
  54   end
  55
  56   def get_emoji(text) when is_binary(text) do
  57     Enum.filter(Emoji.get_all(), fn {emoji, _} -> String.contains?(text, ":#{emoji}:") end)
  58   end
  59
  60   def get_emoji(_), do: []
  61
  62   @link_regex ~r/[0-9a-z+\-\.]+:[0-9a-z$-_.+!*'(),]+/ui
  63
  64   @uri_schemes Application.get_env(:pleroma, :uri_schemes, [])
  65   @valid_schemes Keyword.get(@uri_schemes, :valid_schemes, [])
  66
  67   # TODO: make it use something other than @link_regex
  68   def html_escape(text, "text/html") do
  69     HTML.filter_tags(text)
  70   end
  71
  72   def html_escape(text, "text/plain") do
  73     Regex.split(@link_regex, text, include_captures: true)
  74     |> Enum.map_every(2, fn chunk ->
  75       {:safe, part} = Phoenix.HTML.html_escape(chunk)
  76       part
  77     end)
  78     |> Enum.join("")
  79   end
  80
  81   @doc "changes scheme:... urls to html links"
  82   def add_links({subs, text}) do
  83     links =
  84       text
  85       |> String.split([" ", "\t", "<br>"])
  86       |> Enum.filter(fn word -> String.starts_with?(word, @valid_schemes) end)
  87       |> Enum.filter(fn word -> Regex.match?(@link_regex, word) end)
  88       |> Enum.map(fn url -> {Ecto.UUID.generate(), url} end)
  89       |> Enum.sort_by(fn {_, url} -> -String.length(url) end)
  90
  91     uuid_text =
  92       links
  93       |> Enum.reduce(text, fn {uuid, url}, acc -> String.replace(acc, url, uuid) end)
  94
  95     subs =
  96       subs ++
  97         Enum.map(links, fn {uuid, url} ->
  98           {uuid, "<a href=\"#{url}\">#{url}</a>"}
  99         end)
 100
 101     {subs, uuid_text}
 102   end
 103
 104   @doc "Adds the links to mentioned users"
 105   def add_user_links({subs, text}, mentions) do
 106     mentions =
 107       mentions
 108       |> Enum.sort_by(fn {name, _} -> -String.length(name) end)
 109       |> Enum.map(fn {name, user} -> {name, user, Ecto.UUID.generate()} end)
 110
 111     uuid_text =
 112       mentions
 113       |> Enum.reduce(text, fn {match, _user, uuid}, text ->
 114         String.replace(text, match, uuid)
 115       end)
 116
 117     subs =
 118       subs ++
 119         Enum.map(mentions, fn {match, %User{ap_id: ap_id, info: info}, uuid} ->
 120           ap_id =
 121             if is_binary(info["source_data"]["url"]) do
 122               info["source_data"]["url"]
 123             else
 124               ap_id
 125             end
 126
 127           short_match = String.split(match, "@") |> tl() |> hd()
 128
 129           {uuid,
 130            "<span><a class='mention' href='#{ap_id}'>@<span>#{short_match}</span></a></span>"}
 131         end)
 132
 133     {subs, uuid_text}
 134   end
 135
 136   @doc "Adds the hashtag links"
 137   def add_hashtag_links({subs, text}, tags) do
 138     tags =
 139       tags
 140       |> Enum.sort_by(fn {name, _} -> -String.length(name) end)
 141       |> Enum.map(fn {name, short} -> {name, short, Ecto.UUID.generate()} end)
 142
 143     uuid_text =
 144       tags
 145       |> Enum.reduce(text, fn {match, _short, uuid}, text ->
 146         String.replace(text, match, uuid)
 147       end)
 148
 149     subs =
 150       subs ++
 151         Enum.map(tags, fn {tag_text, tag, uuid} ->
 152           url = "<a href='#{Pleroma.Web.base_url()}/tag/#{tag}' rel='tag'>#{tag_text}</a>"
 153           {uuid, url}
 154         end)
 155
 156     {subs, uuid_text}
 157   end
 158
 159   def finalize({subs, text}) do
 160     Enum.reduce(subs, text, fn {uuid, replacement}, result_text ->
 161       String.replace(result_text, uuid, replacement)
 162     end)
 163   end
 164 end