1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Emoji do
7 The emojis are loaded from:
9 * emoji packs in INSTANCE-DIR/emoji
10 * the files: `config/emoji.txt` and `config/custom_emoji.txt`
11 * glob paths, nested folder is used as tag name for grouping e.g. priv/static/emoji/custom/nested_folder
13 This GenServer stores in an ETS table the list of the loaded emojis, and also allows to reload the list at runtime.
19 @type pattern :: Regex.t() | module() | String.t()
20 @type patterns :: pattern() | [pattern()]
21 @type group_patterns :: keyword(patterns())
24 @ets_options [:ordered_set, :protected, :named_table, {:read_concurrency, true}]
25 @groups Application.get_env(:pleroma, :emoji)[:groups]
29 GenServer.start_link(__MODULE__, [], name: __MODULE__)
32 @doc "Reloads the emojis from disk."
35 GenServer.call(__MODULE__, :reload)
38 @doc "Returns the path of the emoji `name`."
39 @spec get(String.t()) :: String.t() | nil
41 case :ets.lookup(@ets, name) do
47 @doc "Returns all the emojos!!"
48 @spec get_all() :: [{String.t(), String.t()}, ...]
55 @ets = :ets.new(@ets, @ets_options)
56 GenServer.cast(self(), :reload)
61 def handle_cast(:reload, state) do
67 def handle_call(:reload, _from, state) do
73 def terminate(_, _) do
78 def code_change(_old_vsn, state, _extra) do
86 Pleroma.Config.get!([:instance, :static_dir]),
90 case File.ls(emoji_dir_path) do
92 # The custom emoji directory doesn't exist,
97 # There was some other error
98 Logger.error("Could not access the custom emoji directory #{emoji_dir_path}: #{e}")
101 # Print the packs we've found
102 Logger.info("Found emoji packs: #{Enum.join(packs, ", ")}")
107 fn pack -> load_pack(Path.join(emoji_dir_path, pack)) end
110 true = :ets.insert(@ets, emojis)
113 # Compat thing for old custom emoji handling & default emoji,
114 # it should run even if there are no emoji packs
115 shortcode_globs = Application.get_env(:pleroma, :emoji)[:shortcode_globs] || []
118 (load_from_file("config/emoji.txt") ++
119 load_from_file("config/custom_emoji.txt") ++
120 load_from_globs(shortcode_globs))
121 |> Enum.reject(fn value -> value == nil end)
123 true = :ets.insert(@ets, emojis)
128 defp load_pack(pack_dir) do
129 pack_name = Path.basename(pack_dir)
131 emoji_txt = Path.join(pack_dir, "emoji.txt")
133 if File.exists?(emoji_txt) do
134 load_from_file(emoji_txt)
137 "No emoji.txt found for pack \"#{pack_name}\", assuming all .png files are emoji"
140 make_shortcode_to_file_map(pack_dir, [".png"])
141 |> Enum.map(fn {shortcode, rel_file} ->
142 filename = Path.join("/emoji/#{pack_name}", rel_file)
144 {shortcode, filename, [to_string(match_extra(@groups, filename))]}
149 def make_shortcode_to_file_map(pack_dir, exts) do
150 find_all_emoji(pack_dir, exts)
151 |> Enum.map(&Path.relative_to(&1, pack_dir))
152 |> Enum.map(fn f -> {f |> Path.basename() |> Path.rootname(), f} end)
156 def find_all_emoji(dir, exts) do
161 filepath = Path.join(dir, f)
163 if File.dir?(filepath) do
164 acc ++ find_all_emoji(filepath, exts)
170 |> Enum.filter(fn f -> Path.extname(f) in exts end)
173 defp load_from_file(file) do
174 if File.exists?(file) do
175 load_from_file_stream(File.stream!(file))
181 defp load_from_file_stream(stream) do
183 |> Stream.map(&String.trim/1)
184 |> Stream.map(fn line ->
185 case String.split(line, ~r/,\s*/) do
187 {name, file, [to_string(match_extra(@groups, file))]}
189 [name, file | tags] ->
199 defp load_from_globs(globs) do
200 static_path = Path.join(:code.priv_dir(:pleroma), "static")
203 Enum.map(globs, fn glob ->
204 Path.join(static_path, glob)
209 Enum.map(paths, fn path ->
210 tag = match_extra(@groups, Path.join("/", Path.relative_to(path, static_path)))
211 shortcode = Path.basename(path, Path.extname(path))
212 external_path = Path.join("/", Path.relative_to(path, static_path))
213 {shortcode, external_path, [to_string(tag)]}
218 Finds a matching group for the given emoji filename
220 @spec match_extra(group_patterns(), String.t()) :: atom() | nil
221 def match_extra(group_patterns, filename) do
222 match_group_patterns(group_patterns, fn pattern ->
224 %Regex{} = regex -> Regex.match?(regex, filename)
225 string when is_binary(string) -> filename == string
230 defp match_group_patterns(group_patterns, matcher) do
231 Enum.find_value(group_patterns, fn {group, patterns} ->
235 |> Enum.map(fn pattern ->
236 if String.contains?(pattern, "*") do
237 ~r(#{String.replace(pattern, "*", ".*")})
243 Enum.any?(patterns, matcher) && group