113 lines
3.6 KiB
Elixir
113 lines
3.6 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 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.TwitterCard do
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alias Pleroma.User
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alias Pleroma.Web.Metadata
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alias Pleroma.Web.Metadata.Providers.Provider
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alias Pleroma.Web.Metadata.Utils
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@behaviour Provider
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@media_types ["image", "audio", "video"]
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@impl Provider
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def build_tags(%{activity_id: id, object: object, user: user}) do
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attachments = build_attachments(id, object)
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scrubbed_content = Utils.scrub_html_and_truncate(object)
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# Zero width space
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content =
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if scrubbed_content != "" and scrubbed_content != "\u200B" do
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"“" <> scrubbed_content <> "”"
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else
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""
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end
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[
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title_tag(user),
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{:meta, [property: "twitter:description", content: content], []}
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] ++
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if attachments == [] or Metadata.activity_nsfw?(object) do
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[
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image_tag(user),
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{:meta, [property: "twitter:card", content: "summary"], []}
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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 = Utils.scrub_html_and_truncate(user.bio || "") do
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[
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title_tag(user),
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{:meta, [property: "twitter:description", content: truncated_bio], []},
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image_tag(user),
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{:meta, [property: "twitter:card", content: "summary"], []}
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]
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end
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end
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defp title_tag(user) do
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{:meta, [property: "twitter:title", content: Utils.user_name_string(user)], []}
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end
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def image_tag(user) do
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{:meta, [property: "twitter:image", content: Utils.attachment_url(User.avatar_url(user))], []}
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end
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defp build_attachments(id, %{data: %{"attachment" => attachments}}) 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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# TODO: Add additional properties to objects when we have the data available.
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case Utils.fetch_media_type(@media_types, url["mediaType"]) do
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"audio" ->
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[
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{:meta, [property: "twitter:card", content: "player"], []},
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{:meta, [property: "twitter:player:width", content: "480"], []},
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{:meta, [property: "twitter:player:height", content: "80"], []},
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{:meta, [property: "twitter:player", content: player_url(id)], []}
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| acc
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]
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"image" ->
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[
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{:meta, [property: "twitter:card", content: "summary_large_image"], []},
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{:meta,
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[
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property: "twitter:player",
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content: Utils.attachment_url(url["href"])
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], []}
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]
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# TODO: Need the true width and height values here or Twitter renders an iFrame with
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# a bad aspect ratio
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"video" ->
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[
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{:meta, [property: "twitter:card", content: "player"], []},
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{:meta, [property: "twitter:player", content: player_url(id)], []},
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{:meta, [property: "twitter:player:width", content: "480"], []},
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{:meta, [property: "twitter:player:height", content: "480"], []}
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| acc
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]
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_ ->
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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 build_attachments(_id, _object), do: []
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defp player_url(id) do
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Pleroma.Web.Router.Helpers.o_status_url(Pleroma.Web.Endpoint, :notice_player, id)
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end
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end
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