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# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Emoji.Loader do
@moduledoc """
The Loader emoji from:
* emoji packs in INSTANCE-DIR/emoji
* the files: `config/emoji.txt` and `config/custom_emoji.txt`
* glob paths, nested folder is used as tag name for grouping e.g. priv/static/emoji/custom/nested_folder
"""
alias Pleroma.Config
alias Pleroma.Emoji
require Logger
@type pattern :: Regex.t() | module() | String.t()
@type patterns :: pattern() | [pattern()]
@type group_patterns :: keyword(patterns())
@type emoji :: {String.t(), Emoji.t()}
@doc """
Loads emojis from files/packs.
returns list emojis in format:
`{"000", "/emoji/freespeechextremist.com/000.png", ["Custom"]}`
"""
@spec load() :: list(emoji)
def load do
emoji_dir_path = Path.join(Config.get!([:instance, :static_dir]), "emoji")
emoji_groups = Config.get([:emoji, :groups])
emojis =
case File.ls(emoji_dir_path) do
{:error, :enoent} ->
# The custom emoji directory doesn't exist,
# don't do anything
[]
{:error, e} ->
# There was some other error
Logger.error("Could not access the custom emoji directory #{emoji_dir_path}: #{e}")
[]
{:ok, results} ->
grouped =
Enum.group_by(results, fn file ->
File.dir?(Path.join(emoji_dir_path, file))
end)
packs = grouped[true] || []
files = grouped[false] || []
# Print the packs we've found
Logger.info("Found emoji packs: #{Enum.join(packs, ", ")}")
if not Enum.empty?(files) do
Logger.warn(
"Found files in the emoji folder. These will be ignored, please move them to a subdirectory\nFound files: #{
Enum.join(files, ", ")
}"
)
end
emojis =
Enum.flat_map(packs, fn pack ->
load_pack(Path.join(emoji_dir_path, pack), emoji_groups)
end)
Emoji.clear_all()
emojis
end
# Compat thing for old custom emoji handling & default emoji,
# it should run even if there are no emoji packs
shortcode_globs = Config.get([:emoji, :shortcode_globs], [])
emojis_txt =
(load_from_file("config/emoji.txt", emoji_groups) ++
load_from_file("config/custom_emoji.txt", emoji_groups) ++
load_from_globs(shortcode_globs, emoji_groups))
|> Enum.reject(fn value -> value == nil end)
Enum.map(emojis ++ emojis_txt, &prepare_emoji/1)
end
defp prepare_emoji({code, _, _} = emoji), do: {code, Emoji.build(emoji)}
defp load_pack(pack_dir, emoji_groups) do
pack_name = Path.basename(pack_dir)
pack_file = Path.join(pack_dir, "pack.json")
if File.exists?(pack_file) do
contents = Jason.decode!(File.read!(pack_file))
contents["files"]
|> Enum.map(fn {name, rel_file} ->
filename = Path.join("/emoji/#{pack_name}", rel_file)
{name, filename, ["pack:#{pack_name}"]}
end)
else
# Load from emoji.txt / all files
emoji_txt = Path.join(pack_dir, "emoji.txt")
if File.exists?(emoji_txt) do
load_from_file(emoji_txt, emoji_groups)
else
extensions = Pleroma.Config.get([:emoji, :pack_extensions])
Logger.info(
"No emoji.txt found for pack \"#{pack_name}\", assuming all #{
Enum.join(extensions, ", ")
} files are emoji"
)
make_shortcode_to_file_map(pack_dir, extensions)
|> Enum.map(fn {shortcode, rel_file} ->
filename = Path.join("/emoji/#{pack_name}", rel_file)
{shortcode, filename, [to_string(match_extra(emoji_groups, filename))]}
end)
end
end
end
def make_shortcode_to_file_map(pack_dir, exts) do
find_all_emoji(pack_dir, exts)
|> Enum.map(&Path.relative_to(&1, pack_dir))
|> Enum.map(fn f -> {f |> Path.basename() |> Path.rootname(), f} end)
|> Enum.into(%{})
end
def find_all_emoji(dir, exts) do
dir
|> File.ls!()
|> Enum.flat_map(fn f ->
filepath = Path.join(dir, f)
if File.dir?(filepath) do
find_all_emoji(filepath, exts)
else
[filepath]
end
end)
|> Enum.filter(fn f -> Path.extname(f) in exts end)
end
defp load_from_file(file, emoji_groups) do
if File.exists?(file) do
load_from_file_stream(File.stream!(file), emoji_groups)
else
[]
end
end
defp load_from_file_stream(stream, emoji_groups) do
stream
|> Stream.map(&String.trim/1)
|> Stream.map(fn line ->
case String.split(line, ~r/,\s*/) do
[name, file] ->
{name, file, [to_string(match_extra(emoji_groups, file))]}
[name, file | tags] ->
{name, file, tags}
_ ->
nil
end
end)
|> Enum.to_list()
end
defp load_from_globs(globs, emoji_groups) do
static_path = Path.join(:code.priv_dir(:pleroma), "static")
paths =
Enum.map(globs, fn glob ->
Path.join(static_path, glob)
|> Path.wildcard()
end)
|> Enum.concat()
Enum.map(paths, fn path ->
tag = match_extra(emoji_groups, Path.join("/", Path.relative_to(path, static_path)))
shortcode = Path.basename(path, Path.extname(path))
external_path = Path.join("/", Path.relative_to(path, static_path))
{shortcode, external_path, [to_string(tag)]}
end)
end
@doc """
Finds a matching group for the given emoji filename
"""
@spec match_extra(group_patterns(), String.t()) :: atom() | nil
def match_extra(group_patterns, filename) do
match_group_patterns(group_patterns, fn pattern ->
case pattern do
%Regex{} = regex -> Regex.match?(regex, filename)
string when is_binary(string) -> filename == string
end
end)
end
defp match_group_patterns(group_patterns, matcher) do
Enum.find_value(group_patterns, fn {group, patterns} ->
patterns =
patterns
|> List.wrap()
|> Enum.map(fn pattern ->
if String.contains?(pattern, "*") do
~r(#{String.replace(pattern, "*", ".*")})
else
pattern
end
end)
Enum.any?(patterns, matcher) && group
end)
end
end

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