131 lines
4.1 KiB
Elixir
131 lines
4.1 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Formatter do
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alias Pleroma.Emoji
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alias Pleroma.HTML
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alias Pleroma.User
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alias Pleroma.Web.MediaProxy
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@markdown_characters_regex ~r/(`|\*|_|{|}|[|]|\(|\)|#|\+|-|\.|!)/
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@link_regex ~r{((?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~%:/?#[\]@!\$&'\(\)\*\+,;=.]+)|[0-9a-z+\-\.]+:[0-9a-z$-_.+!*'(),]+}ui
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@auto_linker_config hashtag: true,
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hashtag_handler: &Pleroma.Formatter.hashtag_handler/4,
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mention: true,
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mention_handler: &Pleroma.Formatter.mention_handler/4
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def mention_handler("@" <> nickname, buffer, opts, acc) do
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case User.get_cached_by_nickname(nickname) do
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%User{id: id} = user ->
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ap_id = get_ap_id(user)
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nickname_text = get_nickname_text(nickname, opts) |> maybe_escape(opts)
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link =
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"<span class='h-card'><a data-user='#{id}' class='u-url mention' href='#{ap_id}'>@<span>#{
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nickname_text
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}</span></a></span>"
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{link, %{acc | mentions: MapSet.put(acc.mentions, {"@" <> nickname, user})}}
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_ ->
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{buffer, acc}
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end
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end
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def hashtag_handler("#" <> tag = tag_text, _buffer, _opts, acc) do
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tag = String.downcase(tag)
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url = "#{Pleroma.Web.base_url()}/tag/#{tag}"
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link = "<a class='hashtag' data-tag='#{tag}' href='#{url}' rel='tag'>#{tag_text}</a>"
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{link, %{acc | tags: MapSet.put(acc.tags, {tag_text, tag})}}
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end
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@doc """
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Parses a text and replace plain text links with HTML. Returns a tuple with a result text, mentions, and hashtags.
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"""
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@spec linkify(String.t(), keyword()) ::
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{String.t(), [{String.t(), User.t()}], [{String.t(), String.t()}]}
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def linkify(text, options \\ []) do
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options = options ++ @auto_linker_config
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acc = %{mentions: MapSet.new(), tags: MapSet.new()}
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{text, %{mentions: mentions, tags: tags}} = AutoLinker.link_map(text, acc, options)
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{text, MapSet.to_list(mentions), MapSet.to_list(tags)}
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end
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def emojify(text) do
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emojify(text, Emoji.get_all())
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end
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def emojify(text, nil), do: text
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def emojify(text, emoji, strip \\ false) do
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Enum.reduce(emoji, text, fn {emoji, file}, text ->
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emoji = HTML.strip_tags(emoji)
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file = HTML.strip_tags(file)
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html =
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if not strip do
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"<img height='32px' width='32px' alt='#{emoji}' title='#{emoji}' src='#{
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MediaProxy.url(file)
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}' />"
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else
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""
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end
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String.replace(text, ":#{emoji}:", html) |> HTML.filter_tags()
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end)
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end
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def demojify(text) do
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emojify(text, Emoji.get_all(), true)
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end
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def demojify(text, nil), do: text
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def get_emoji(text) when is_binary(text) do
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Enum.filter(Emoji.get_all(), fn {emoji, _} -> String.contains?(text, ":#{emoji}:") end)
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end
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def get_emoji(_), do: []
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def html_escape(text, "text/html") do
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HTML.filter_tags(text)
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end
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def html_escape(text, "text/plain") do
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Regex.split(@link_regex, text, include_captures: true)
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|> Enum.map_every(2, fn chunk ->
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{:safe, part} = Phoenix.HTML.html_escape(chunk)
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part
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end)
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|> Enum.join("")
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end
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def truncate(text, max_length \\ 200, omission \\ "...") do
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# Remove trailing whitespace
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text = Regex.replace(~r/([^ \t\r\n])([ \t]+$)/u, text, "\\g{1}")
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if String.length(text) < max_length do
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text
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else
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length_with_omission = max_length - String.length(omission)
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String.slice(text, 0, length_with_omission) <> omission
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end
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end
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defp get_ap_id(%User{info: %{source_data: %{"url" => url}}}) when is_binary(url), do: url
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defp get_ap_id(%User{ap_id: ap_id}), do: ap_id
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defp get_nickname_text(nickname, %{mentions_format: :full}), do: User.full_nickname(nickname)
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defp get_nickname_text(nickname, _), do: User.local_nickname(nickname)
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defp maybe_escape(str, %{mentions_escape: true}) do
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String.replace(str, @markdown_characters_regex, "\\\\\\1")
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end
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defp maybe_escape(str, _), do: str
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end
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