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emoji_react_validator.ex
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emoji_react_validator.ex
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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.ObjectValidators.EmojiReactValidator do
use Ecto.Schema
alias Pleroma.Emoji
alias Pleroma.Object
alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
alias Pleroma.Web.ActivityPub.ObjectValidators.TagValidator
import Ecto.Changeset
import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
@primary_key false
embedded_schema do
quote do
unquote do
import Elixir.Pleroma.Web.ActivityPub.ObjectValidators.CommonFields
message_fields()
activity_fields()
embeds_many(:tag, TagValidator)
end
end
field(:context, :string)
field(:content, :string)
end
def cast_and_validate(data) do
data
|> cast_data()
|> validate_data()
end
def cast_data(data) do
data =
data
|> fix()
%__MODULE__{}
|> changeset(data)
end
def changeset(struct, data) do
struct
|> cast(data, __schema__(:fields) -- [:tag])
|> cast_embed(:tag)
end
defp fix(data) do
data =
data
|> fix_emoji_qualification()
|> CommonFixes.fix_actor()
|> CommonFixes.fix_activity_addressing()
data = Map.put_new(data, "tag", [])
case Object.normalize(data["object"]) do
%Object{} = object ->
data
|> CommonFixes.fix_activity_context(object)
|> CommonFixes.fix_object_action_recipients(object)
_ ->
data
end
end
defp fix_emoji_qualification(%{"content" => emoji} = data) do
new_emoji = Pleroma.Emoji.fully_qualify_emoji(emoji)
cond do
Pleroma.Emoji.unicode?(emoji) ->
data
Pleroma.Emoji.unicode?(new_emoji) ->
data |> Map.put("content", new_emoji)
true ->
data
end
end
defp fix_emoji_qualification(data), do: data
defp validate_emoji(cng) do
content = get_field(cng, :content)
if Emoji.unicode?(content) || Emoji.custom?(content) do
cng
else
cng
|> add_error(:content, "is not a valid emoji")
end
end
defp maybe_validate_tag_presence(cng) do
content = get_field(cng, :content)
if Emoji.unicode?(content) do
cng
else
tag = get_field(cng, :tag)
emoji_name = Emoji.maybe_strip_name(content)
case tag do
[%{name: ^emoji_name, type: "Emoji", icon: %{url: _}}] ->
cng
_ ->
cng
|> add_error(:tag, "does not contain an Emoji tag")
end
end
end
defp validate_data(data_cng) do
data_cng
|> validate_inclusion(:type, ["EmojiReact"])
|> validate_required([:id, :type, :object, :actor, :context, :to, :cc, :content])
|> validate_actor_presence()
|> validate_object_presence()
|> validate_emoji()
|> maybe_validate_tag_presence()
end
end

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