136 lines
4.7 KiB
Elixir
136 lines
4.7 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Formatter do
|
|
alias Pleroma.HTML
|
|
alias Pleroma.User
|
|
|
|
@safe_mention_regex ~r/^(\s*(?<mentions>(@.+?\s+){1,})+)(?<rest>.*)/s
|
|
@link_regex ~r"((?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~%:/?#[\]@!\$&'\(\)\*\+,;=.]+)|[0-9a-z+\-\.]+:[0-9a-z$-_.+!*'(),]+"ui
|
|
@markdown_characters_regex ~r/(`|\*|_|{|}|[|]|\(|\)|#|\+|-|\.|!)/
|
|
|
|
@auto_linker_config hashtag: true,
|
|
hashtag_handler: &Pleroma.Formatter.hashtag_handler/4,
|
|
mention: true,
|
|
mention_handler: &Pleroma.Formatter.mention_handler/4
|
|
|
|
def escape_mention_handler("@" <> nickname = mention, buffer, _, _) do
|
|
case User.get_cached_by_nickname(nickname) do
|
|
%User{} ->
|
|
# escape markdown characters with `\\`
|
|
# (we don't want something like @user__name to be parsed by markdown)
|
|
String.replace(mention, @markdown_characters_regex, "\\\\\\1")
|
|
|
|
_ ->
|
|
buffer
|
|
end
|
|
end
|
|
|
|
def mention_handler("@" <> nickname, buffer, opts, acc) do
|
|
case User.get_cached_by_nickname(nickname) do
|
|
%User{id: id} = user ->
|
|
ap_id = get_ap_id(user)
|
|
nickname_text = get_nickname_text(nickname, opts)
|
|
|
|
link =
|
|
"<span class='h-card'><a data-user='#{id}' class='u-url mention' href='#{ap_id}'>@<span>#{
|
|
nickname_text
|
|
}</span></a></span>"
|
|
|
|
{link, %{acc | mentions: MapSet.put(acc.mentions, {"@" <> nickname, user})}}
|
|
|
|
_ ->
|
|
{buffer, acc}
|
|
end
|
|
end
|
|
|
|
def hashtag_handler("#" <> tag = tag_text, _buffer, _opts, acc) do
|
|
tag = String.downcase(tag)
|
|
url = "#{Pleroma.Web.base_url()}/tag/#{tag}"
|
|
link = "<a class='hashtag' data-tag='#{tag}' href='#{url}' rel='tag'>#{tag_text}</a>"
|
|
|
|
{link, %{acc | tags: MapSet.put(acc.tags, {tag_text, tag})}}
|
|
end
|
|
|
|
@doc """
|
|
Parses a text and replace plain text links with HTML. Returns a tuple with a result text, mentions, and hashtags.
|
|
|
|
If the 'safe_mention' option is given, only consecutive mentions at the start the post are actually mentioned.
|
|
"""
|
|
@spec linkify(String.t(), keyword()) ::
|
|
{String.t(), [{String.t(), User.t()}], [{String.t(), String.t()}]}
|
|
def linkify(text, options \\ []) do
|
|
options = options ++ @auto_linker_config
|
|
|
|
if options[:safe_mention] && Regex.named_captures(@safe_mention_regex, text) do
|
|
%{"mentions" => mentions, "rest" => rest} = Regex.named_captures(@safe_mention_regex, text)
|
|
acc = %{mentions: MapSet.new(), tags: MapSet.new()}
|
|
|
|
{text_mentions, %{mentions: mentions}} = AutoLinker.link_map(mentions, acc, options)
|
|
{text_rest, %{tags: tags}} = AutoLinker.link_map(rest, acc, options)
|
|
|
|
{text_mentions <> text_rest, MapSet.to_list(mentions), MapSet.to_list(tags)}
|
|
else
|
|
acc = %{mentions: MapSet.new(), tags: MapSet.new()}
|
|
{text, %{mentions: mentions, tags: tags}} = AutoLinker.link_map(text, acc, options)
|
|
|
|
{text, MapSet.to_list(mentions), MapSet.to_list(tags)}
|
|
end
|
|
end
|
|
|
|
@doc """
|
|
Escapes a special characters in mention names.
|
|
"""
|
|
def mentions_escape(text, options \\ []) do
|
|
options =
|
|
Keyword.merge(options,
|
|
mention: true,
|
|
url: false,
|
|
mention_handler: &Pleroma.Formatter.escape_mention_handler/4
|
|
)
|
|
|
|
if options[:safe_mention] && Regex.named_captures(@safe_mention_regex, text) do
|
|
%{"mentions" => mentions, "rest" => rest} = Regex.named_captures(@safe_mention_regex, text)
|
|
AutoLinker.link(mentions, options) <> AutoLinker.link(rest, options)
|
|
else
|
|
AutoLinker.link(text, options)
|
|
end
|
|
end
|
|
|
|
def html_escape({text, mentions, hashtags}, type) do
|
|
{html_escape(text, type), mentions, hashtags}
|
|
end
|
|
|
|
def html_escape(text, "text/html") do
|
|
HTML.filter_tags(text)
|
|
end
|
|
|
|
def html_escape(text, "text/plain") do
|
|
Regex.split(@link_regex, text, include_captures: true)
|
|
|> Enum.map_every(2, fn chunk ->
|
|
{:safe, part} = Phoenix.HTML.html_escape(chunk)
|
|
part
|
|
end)
|
|
|> Enum.join("")
|
|
end
|
|
|
|
def truncate(text, max_length \\ 200, omission \\ "...") do
|
|
# Remove trailing whitespace
|
|
text = Regex.replace(~r/([^ \t\r\n])([ \t]+$)/u, text, "\\g{1}")
|
|
|
|
if String.length(text) < max_length do
|
|
text
|
|
else
|
|
length_with_omission = max_length - String.length(omission)
|
|
String.slice(text, 0, length_with_omission) <> omission
|
|
end
|
|
end
|
|
|
|
defp get_ap_id(%User{info: %{source_data: %{"url" => url}}}) when is_binary(url), do: url
|
|
defp get_ap_id(%User{ap_id: ap_id}), do: ap_id
|
|
|
|
defp get_nickname_text(nickname, %{mentions_format: :full}), do: User.full_nickname(nickname)
|
|
defp get_nickname_text(nickname, _), do: User.local_nickname(nickname)
|
|
end
|