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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.Emoji do
@moduledoc """
This GenServer stores in an ETS table the list of the loaded emojis,
and also allows to reload the list at runtime.
"""
use GenServer
alias Pleroma.Emoji.Combinations
alias Pleroma.Emoji.Loader
require Logger
@ets __MODULE__.Ets
@ets_options [
:ordered_set,
:protected,
:named_table,
{:read_concurrency, true}
]
defstruct [:code, :file, :tags, :safe_code, :safe_file]
@type t :: %__MODULE__{}
@doc "Build emoji struct"
def build({code, file, tags}) do
%__MODULE__{
code: code,
file: file,
tags: tags,
safe_code: Pleroma.HTML.strip_tags(code),
safe_file: Pleroma.HTML.strip_tags(file)
}
end
def build({code, file}), do: build({code, file, []})
@doc false
def start_link(_) do
GenServer.start_link(__MODULE__, [], name: __MODULE__)
end
@doc "Reloads the emojis from disk."
@spec reload() :: :ok
def reload do
GenServer.call(__MODULE__, :reload)
end
@doc "Returns the path of the emoji `name`."
@spec get(String.t()) :: Pleroma.Emoji.t() | nil
def get(name) do
name = maybe_strip_name(name)
case :ets.lookup(@ets, name) do
[{_, emoji}] -> emoji
_ -> nil
end
end
@spec exist?(String.t()) :: boolean()
def exist?(name), do: not is_nil(get(name))
@doc "Returns all the emojos!!"
@spec get_all() :: list({String.t(), String.t(), String.t()})
def get_all do
:ets.tab2list(@ets)
end
@doc "Clear out old emojis"
def clear_all, do: :ets.delete_all_objects(@ets)
@doc false
def init(_) do
@ets = :ets.new(@ets, @ets_options)
GenServer.cast(self(), :reload)
{:ok, nil}
end
@doc false
def handle_cast(:reload, state) do
update_emojis(Loader.load())
{:noreply, state}
end
@doc false
def handle_call(:reload, _from, state) do
update_emojis(Loader.load())
{:reply, :ok, state}
end
@doc false
def terminate(_, _) do
:ok
end
@doc false
def code_change(_old_vsn, state, _extra) do
update_emojis(Loader.load())
{:ok, state}
end
defp update_emojis(emojis) do
:ets.insert(@ets, emojis)
end
@external_resource "lib/pleroma/emoji-test.txt"
regional_indicators =
Enum.map(127_462..127_487, fn codepoint ->
<<codepoint::utf8>>
end)
emojis =
@external_resource
|> File.read!()
|> String.split("\n")
|> Enum.filter(fn line ->
line != "" and not String.starts_with?(line, "#") and
String.contains?(line, "fully-qualified")
end)
|> Enum.map(fn line ->
line
|> String.split(";", parts: 2)
|> hd()
|> String.trim()
|> String.split()
|> Enum.map(fn codepoint ->
<<String.to_integer(codepoint, 16)::utf8>>
end)
|> Enum.join()
end)
|> Enum.uniq()
emojis = emojis ++ regional_indicators
for emoji <- emojis do
def unicode?(unquote(emoji)), do: true
end
def unicode?(_), do: false
@emoji_regex ~r/:[A-Za-z0-9_-]+(@.+)?:/
def custom?(s) when is_binary(s), do: Regex.match?(@emoji_regex, s)
def custom?(_), do: false
def maybe_strip_name(name) when is_binary(name), do: String.trim(name, ":")
def maybe_strip_name(name), do: name
def maybe_quote(name) when is_binary(name) do
if unicode?(name) do
name
else
if String.starts_with?(name, ":") do
name
else
":#{name}:"
end
end
end
def maybe_quote(name), do: name
def emoji_url(%{"type" => "EmojiReact", "content" => _, "tag" => []}), do: nil
def emoji_url(%{"type" => "EmojiReact", "content" => emoji, "tag" => tags}) do
emoji = maybe_strip_name(emoji)
tag =
tags
|> Enum.find(fn tag ->
tag["type"] == "Emoji" && !is_nil(tag["name"]) && tag["name"] == emoji
end)
if is_nil(tag) do
nil
else
tag
|> Map.get("icon")
|> Map.get("url")
end
end
def emoji_url(_), do: nil
def emoji_name_with_instance(name, url) do
url = url |> URI.parse() |> Map.get(:host)
"#{name}@#{url}"
end
emoji_qualification_map =
emojis
|> Enum.filter(&String.contains?(&1, "\uFE0F"))
|> Combinations.variate_emoji_qualification()
for {qualified, unqualified_list} <- emoji_qualification_map do
for unqualified <- unqualified_list do
def fully_qualify_emoji(unquote(unqualified)), do: unquote(qualified)
end
end
def fully_qualify_emoji(emoji), do: emoji
end

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