mobilizon/lib/mobilizon_web/api/utils.ex

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Elixir
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defmodule MobilizonWeb.API.Utils do
@moduledoc """
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Utils for API.
"""
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Config
alias Mobilizon.Service.Formatter
@ap_public "https://www.w3.org/ns/activitystreams#Public"
@doc """
Determines the full audience based on mentions for a public audience
Audience is:
* `to` : the mentioned actors, the eventual actor we're replying to and the public
* `cc` : the actor's followers
"""
@spec get_to_and_cc(Actor.t(), list(), map(), String.t()) :: {list(), list()}
def get_to_and_cc(%Actor{} = actor, mentions, inReplyTo, :public) do
to = [@ap_public | mentions]
cc = [actor.followers_url]
if inReplyTo do
{Enum.uniq([inReplyTo.actor | to]), cc}
else
{to, cc}
end
end
@doc """
Determines the full audience based on mentions based on a unlisted audience
Audience is:
* `to` : the mentionned actors, actor's followers and the eventual actor we're replying to
* `cc` : public
"""
@spec get_to_and_cc(Actor.t(), list(), map(), String.t()) :: {list(), list()}
def get_to_and_cc(%Actor{} = actor, mentions, inReplyTo, :unlisted) do
to = [actor.followers_url | mentions]
cc = [@ap_public]
if inReplyTo do
{Enum.uniq([inReplyTo.actor | to]), cc}
else
{to, cc}
end
end
@doc """
Determines the full audience based on mentions based on a private audience
Audience is:
* `to` : the mentioned actors, actor's followers and the eventual actor we're replying to
* `cc` : none
"""
@spec get_to_and_cc(Actor.t(), list(), map(), String.t()) :: {list(), list()}
def get_to_and_cc(%Actor{} = actor, mentions, inReplyTo, :private) do
{to, cc} = get_to_and_cc(actor, mentions, inReplyTo, :direct)
{[actor.followers_url | to], cc}
end
@doc """
Determines the full audience based on mentions based on a direct audience
Audience is:
* `to` : the mentioned actors and the eventual actor we're replying to
* `cc` : none
"""
@spec get_to_and_cc(Actor.t(), list(), map(), String.t()) :: {list(), list()}
def get_to_and_cc(_actor, mentions, inReplyTo, :direct) do
if inReplyTo do
{Enum.uniq([inReplyTo.actor | mentions]), []}
else
{mentions, []}
end
end
def get_to_and_cc(_actor, mentions, _inReplyTo, {:list, _}) do
{mentions, []}
end
# def get_addressed_users(_, to) when is_list(to) do
# Actors.get(to)
# end
def get_addressed_users(mentioned_users, _), do: mentioned_users
@doc """
Creates HTML content from text and mentions
"""
@spec make_content_html(String.t(), list(), String.t()) :: String.t()
def make_content_html(
text,
additional_tags,
content_type
) do
with {text, mentions, tags} <- format_input(text, content_type, []) do
{text, mentions, additional_tags ++ Enum.map(tags, fn {_, tag} -> tag end)}
end
end
def format_input(text, "text/plain", options) do
text
|> Formatter.html_escape("text/plain")
|> Formatter.linkify(options)
|> (fn {text, mentions, tags} ->
{String.replace(text, ~r/\r?\n/, "<br>"), mentions, tags}
end).()
end
def format_input(text, "text/html", options) do
text
|> Formatter.html_escape("text/html")
|> Formatter.linkify(options)
end
def make_report_content_text(nil), do: {:ok, nil}
def make_report_content_text(comment) do
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max_size = Config.get([:instance, :max_report_comment_size], 1000)
if String.length(comment) <= max_size do
{:ok, Formatter.html_escape(comment, "text/plain")}
else
{:error, "Comment must be up to #{max_size} characters"}
end
end
def prepare_content(actor, content, visibility, tags, in_reply_to) do
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with content <- String.trim(content || ""),
{content_html, mentions, tags} <-
make_content_html(
content,
tags,
"text/html"
),
mentioned_users <- for({_, mentioned_user} <- mentions, do: mentioned_user.url),
addressed_users <- get_addressed_users(mentioned_users, nil),
{to, cc} <- get_to_and_cc(actor, addressed_users, in_reply_to, visibility) do
{content_html, tags, to, cc}
end
end
end