1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
# 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 =
~s(<span class="h-card"><a data-user="#{id}" class="u-url mention" href="#{ap_id}" rel="ugc">@<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 = ~s(<a class="hashtag" data-tag="#{tag}" href="#{url}" rel="tag ugc">#{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
|
