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Diffstat (limited to 'lib/pleroma/emoji/loader.ex')
| -rw-r--r-- | lib/pleroma/emoji/loader.ex | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/lib/pleroma/emoji/loader.ex b/lib/pleroma/emoji/loader.ex new file mode 100644 index 000000000..4f4ee51d1 --- /dev/null +++ b/lib/pleroma/emoji/loader.ex @@ -0,0 +1,224 @@ +# 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 |