forked from AkkomaGang/akkoma
107 lines
3.3 KiB
Elixir
107 lines
3.3 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.Web.Metadata.Providers.OpenGraph do
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alias Pleroma.Web.Metadata.Providers.Provider
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alias Pleroma.{HTML, Formatter, User}
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alias Pleroma.Web.MediaProxy
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@behaviour Provider
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@impl Provider
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def build_tags(%{activity: activity, user: user}) do
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attachments = build_attachments(activity)
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[
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{:meta,
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[
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property: "og:title",
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content: user_name_string(user)
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], []},
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{:meta, [property: "og:url", content: activity.data["id"]], []},
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{:meta, [property: "og:description", content: scrub_html_and_truncate(activity)], []}
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] ++
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if attachments == [] or
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Enum.any?(activity.data["object"]["tag"], fn tag -> tag == "nsfw" end) do
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[
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{:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
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{:meta, [property: "og:image:width", content: 120], []},
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{:meta, [property: "og:image:height", content: 120], []}
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]
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else
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attachments
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end
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end
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@impl Provider
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def build_tags(%{user: user}) do
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with truncated_bio = scrub_html_and_truncate(user.bio || "") do
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[
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{:meta,
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[
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property: "og:title",
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content: user_name_string(user)
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], []},
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{:meta, [property: "og:url", content: User.profile_url(user)], []},
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{:meta, [property: "og:description", content: truncated_bio], []},
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{:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
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{:meta, [property: "og:image:width", content: 120], []},
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{:meta, [property: "og:image:height", content: 120], []}
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]
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end
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end
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defp build_attachments(%{data: %{"object" => %{"attachment" => attachments}}} = _activity) do
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Enum.reduce(attachments, [], fn attachment, acc ->
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rendered_tags =
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Enum.reduce(attachment["url"], [], fn url, acc ->
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media_type =
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Enum.find(["image", "audio", "video"], fn media_type ->
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String.starts_with?(url["mediaType"], media_type)
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end)
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if media_type do
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[
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{:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])], []}
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| acc
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]
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else
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acc
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end
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end)
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acc ++ rendered_tags
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end)
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end
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defp scrub_html_and_truncate(%{data: %{"object" => %{"content" => content}}} = activity) do
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content
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# html content comes from DB already encoded, decode first and scrub after
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|> HtmlEntities.decode()
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|> String.replace(~r/<br\s?\/?>/, " ")
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|> HTML.get_cached_stripped_html_for_object(activity, __MODULE__)
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|> Formatter.truncate()
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end
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defp scrub_html_and_truncate(content) when is_binary(content) do
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content
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# html content comes from DB already encoded, decode first and scrub after
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|> HtmlEntities.decode()
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|> String.replace(~r/<br\s?\/?>/, " ")
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|> HTML.strip_tags()
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|> Formatter.truncate()
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end
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defp attachment_url(url) do
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MediaProxy.url(url)
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end
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defp user_name_string(user) do
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"#{user.name} " <>
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if user.local do
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"(@#{user.nickname}@#{Pleroma.Web.Endpoint.host()})"
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else
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"(@#{user.nickname})"
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end
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end
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end
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