135 lines
2.9 KiB
Elixir
135 lines
2.9 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.Emoji do
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@moduledoc """
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This GenServer stores in an ETS table the list of the loaded emojis,
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and also allows to reload the list at runtime.
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"""
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use GenServer
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alias Pleroma.Emoji.Loader
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require Logger
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@ets __MODULE__.Ets
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@ets_options [
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:ordered_set,
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:protected,
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:named_table,
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{:read_concurrency, true}
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]
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defstruct [:code, :file, :tags, :safe_code, :safe_file]
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@doc "Build emoji struct"
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def build({code, file, tags}) do
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%__MODULE__{
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code: code,
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file: file,
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tags: tags,
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safe_code: Pleroma.HTML.strip_tags(code),
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safe_file: Pleroma.HTML.strip_tags(file)
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}
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end
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def build({code, file}), do: build({code, file, []})
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@doc false
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def start_link(_) do
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GenServer.start_link(__MODULE__, [], name: __MODULE__)
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end
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@doc "Reloads the emojis from disk."
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@spec reload() :: :ok
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def reload do
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GenServer.call(__MODULE__, :reload)
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end
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@doc "Returns the path of the emoji `name`."
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@spec get(String.t()) :: String.t() | nil
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def get(name) do
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case :ets.lookup(@ets, name) do
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[{_, path}] -> path
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_ -> nil
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end
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end
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@spec exist?(String.t()) :: boolean()
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def exist?(name), do: not is_nil(get(name))
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@doc "Returns all the emojos!!"
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@spec get_all() :: list({String.t(), String.t(), String.t()})
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def get_all do
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:ets.tab2list(@ets)
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end
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@doc "Clear out old emojis"
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def clear_all, do: :ets.delete_all_objects(@ets)
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@doc false
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def init(_) do
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@ets = :ets.new(@ets, @ets_options)
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GenServer.cast(self(), :reload)
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{:ok, nil}
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end
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@doc false
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def handle_cast(:reload, state) do
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update_emojis(Loader.load())
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{:noreply, state}
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end
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@doc false
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def handle_call(:reload, _from, state) do
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update_emojis(Loader.load())
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{:reply, :ok, state}
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end
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@doc false
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def terminate(_, _) do
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:ok
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end
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@doc false
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def code_change(_old_vsn, state, _extra) do
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update_emojis(Loader.load())
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{:ok, state}
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end
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defp update_emojis(emojis) do
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:ets.insert(@ets, emojis)
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end
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@external_resource "lib/pleroma/emoji-data.txt"
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emojis =
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@external_resource
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|> File.read!()
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|> String.split("\n")
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|> Enum.filter(fn line -> line != "" and not String.starts_with?(line, "#") end)
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|> Enum.map(fn line ->
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line
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|> String.split(";", parts: 2)
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|> hd()
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|> String.trim()
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|> String.split("..")
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|> case do
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[number] ->
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<<String.to_integer(number, 16)::utf8>>
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[first, last] ->
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String.to_integer(first, 16)..String.to_integer(last, 16)
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|> Enum.map(&<<&1::utf8>>)
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end
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end)
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|> List.flatten()
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|> Enum.uniq()
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for emoji <- emojis do
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def is_unicode_emoji?(unquote(emoji)), do: true
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end
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def is_unicode_emoji?(_), do: false
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end
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