mobilizon/lib/graphql/api/utils.ex

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defmodule Mobilizon.GraphQL.API.Utils do
@moduledoc """
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Utils for API.
"""
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alias Mobilizon.Medias
alias Mobilizon.Medias.Media
alias Mobilizon.Service.Formatter
@doc """
Creates HTML content from text and mentions
"""
@spec make_content_html(String.t(), list(), String.t()) :: {String.t(), list(), list()}
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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)
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|> (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
@doc """
Use the data-media-id attributes to extract media from body text
"""
@spec extract_pictures_from_body(String.t(), integer() | String.t()) :: list(Media.t())
def extract_pictures_from_body(body, actor_id) do
body
|> do_extract_pictures_from_body()
|> Enum.map(&fetch_picture(&1, actor_id))
|> Enum.filter(& &1)
end
@spec do_extract_pictures_from_body(String.t()) :: list(String.t())
defp do_extract_pictures_from_body(body) when is_nil(body) or body == "", do: []
defp do_extract_pictures_from_body(body) do
{:ok, document} = Floki.parse_document(body)
document
|> Floki.attribute("img", "data-media-id")
end
@spec fetch_picture(String.t() | integer(), String.t() | integer()) :: Media.t() | nil
defp fetch_picture(id, actor_id) do
with %Media{actor_id: media_actor_id} = media <- Medias.get_media(id),
{:owns_media, true} <-
{:owns_media, check_actor_owns_media?(actor_id, media_actor_id)} do
media
else
_ -> nil
end
end
@spec check_actor_owns_media?(integer() | String.t(), integer() | String.t()) :: boolean()
defp check_actor_owns_media?(actor_id, media_actor_id) do
actor_id == media_actor_id || Mobilizon.Actors.is_member?(media_actor_id, actor_id)
end
end