560 lines
18 KiB
Elixir
560 lines
18 KiB
Elixir
defmodule Pleroma.Web.EmojiAPI.EmojiAPIController do
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use Pleroma.Web, :controller
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require Logger
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def reload(conn, _params) do
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Pleroma.Emoji.reload()
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conn |> text("ok")
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end
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@emoji_dir_path Path.join(
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Pleroma.Config.get!([:instance, :static_dir]),
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"emoji"
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)
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@cache_seconds_per_file Pleroma.Config.get!([:emoji, :shared_pack_cache_seconds_per_file])
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@doc """
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Lists the packs available on the instance as JSON.
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The information is public and does not require authentification. The format is
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a map of "pack directory name" to pack.json contents.
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"""
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def list_packs(conn, _params) do
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pack_infos =
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case File.ls(@emoji_dir_path) do
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{:error, _} ->
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%{}
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{:ok, results} ->
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results
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|> Enum.filter(fn file ->
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dir_path = Path.join(@emoji_dir_path, file)
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# Filter to only use the pack.json packs
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File.dir?(dir_path) and File.exists?(Path.join(dir_path, "pack.json"))
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end)
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|> Enum.map(fn pack_name ->
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pack_path = Path.join(@emoji_dir_path, pack_name)
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pack_file = Path.join(pack_path, "pack.json")
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{pack_name, Jason.decode!(File.read!(pack_file))}
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end)
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# Transform into a map of pack-name => pack-data
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# Check if all the files are in place and can be sent
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|> Enum.map(fn {name, pack} ->
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pack_path = Path.join(@emoji_dir_path, name)
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if can_download?(pack, pack_path) do
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archive_for_sha = make_archive(name, pack, pack_path)
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archive_sha = :crypto.hash(:sha256, archive_for_sha) |> Base.encode16()
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{name,
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pack
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|> put_in(["pack", "can-download"], true)
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|> put_in(["pack", "download-sha256"], archive_sha)}
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else
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{name,
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pack
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|> put_in(["pack", "can-download"], false)}
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end
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end)
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|> Enum.into(%{})
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end
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conn |> json(pack_infos)
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end
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defp can_download?(pack, pack_path) do
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# If the pack is set as shared, check if it can be downloaded
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# That means that when asked, the pack can be packed and sent to the remote
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# Otherwise, they'd have to download it from external-src
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pack["pack"]["share-files"] &&
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Enum.all?(pack["files"], fn {_, path} ->
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File.exists?(Path.join(pack_path, path))
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end)
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end
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defp create_archive_and_cache(name, pack, pack_dir, md5) do
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files =
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['pack.json'] ++
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(pack["files"] |> Enum.map(fn {_, path} -> to_charlist(path) end))
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{:ok, {_, zip_result}} = :zip.zip('#{name}.zip', files, [:memory, cwd: to_charlist(pack_dir)])
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cache_ms = :timer.seconds(@cache_seconds_per_file * Enum.count(files))
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Cachex.put!(
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:emoji_packs_cache,
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name,
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# if pack.json MD5 changes, the cache is not valid anymore
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%{pack_json_md5: md5, pack_data: zip_result},
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# Add a minute to cache time for every file in the pack
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ttl: cache_ms
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)
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Logger.debug("Created an archive for the '#{name}' emoji pack, \
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keeping it in cache for #{div(cache_ms, 1000)}s")
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zip_result
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end
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defp make_archive(name, pack, pack_dir) do
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# Having a different pack.json md5 invalidates cache
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pack_file_md5 = :crypto.hash(:md5, File.read!(Path.join(pack_dir, "pack.json")))
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case Cachex.get!(:emoji_packs_cache, name) do
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%{pack_file_md5: ^pack_file_md5, pack_data: zip_result} ->
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Logger.debug("Using cache for the '#{name}' shared emoji pack")
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zip_result
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_ ->
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create_archive_and_cache(name, pack, pack_dir, pack_file_md5)
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end
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end
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@doc """
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An endpoint for other instances (via admin UI) or users (via browser)
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to download packs that the instance shares.
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"""
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def download_shared(conn, %{"name" => name}) do
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pack_dir = Path.join(@emoji_dir_path, name)
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pack_file = Path.join(pack_dir, "pack.json")
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if File.exists?(pack_file) do
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pack = Jason.decode!(File.read!(pack_file))
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if can_download?(pack, pack_dir) do
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zip_result = make_archive(name, pack, pack_dir)
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conn
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|> send_download({:binary, zip_result}, filename: "#{name}.zip")
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else
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{:error,
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conn
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|> put_status(:forbidden)
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|> text("Pack #{name} cannot be downloaded from this instance, either pack sharing\
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was disabled for this pack or some files are missing")}
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end
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else
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{:error,
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conn
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|> put_status(:not_found)
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|> text("Pack #{name} does not exist")}
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end
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end
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@doc """
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An admin endpoint to request downloading a pack named `pack_name` from the instance
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`instance_address`.
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If the requested instance's admin chose to share the pack, it will be downloaded
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from that instance, otherwise it will be downloaded from the fallback source, if there is one.
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"""
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def download_from(conn, %{"instance_address" => address, "pack_name" => name} = data) do
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list_uri = "#{address}/api/pleroma/emoji/packs/list"
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list = Tesla.get!(list_uri).body |> Jason.decode!()
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full_pack = list[name]
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pfiles = full_pack["files"]
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pack = full_pack["pack"]
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pack_info_res =
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cond do
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pack["share-files"] && pack["can-download"] ->
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{:ok,
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%{
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sha: pack["download-sha256"],
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uri: "#{address}/api/pleroma/emoji/packs/download_shared/#{name}"
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}}
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pack["fallback-src"] ->
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{:ok,
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%{
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sha: pack["fallback-src-sha256"],
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uri: pack["fallback-src"],
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fallback: true
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}}
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true ->
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{:error, "The pack was not set as shared and there is no fallback src to download from"}
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end
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case pack_info_res do
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{:ok, %{sha: sha, uri: uri} = pinfo} ->
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sha = Base.decode16!(sha)
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emoji_archive = Tesla.get!(uri).body
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got_sha = :crypto.hash(:sha256, emoji_archive)
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if got_sha == sha do
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local_name = data["as"] || name
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pack_dir = Path.join(@emoji_dir_path, local_name)
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File.mkdir_p!(pack_dir)
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# Fallback cannot contain a pack.json file
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files =
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unless(pinfo[:fallback], do: ['pack.json'], else: []) ++
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(pfiles |> Enum.map(fn {_, path} -> to_charlist(path) end))
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{:ok, _} = :zip.unzip(emoji_archive, cwd: to_charlist(pack_dir), file_list: files)
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# Fallback can't contain a pack.json file, since that would cause the fallback-src-sha256
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# in it to depend on itself
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if pinfo[:fallback] do
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pack_file_path = Path.join(pack_dir, "pack.json")
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File.write!(pack_file_path, Jason.encode!(full_pack, pretty: true))
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end
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conn |> text("ok")
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else
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conn
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|> put_status(:internal_server_error)
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|> text("SHA256 for the pack doesn't match the one sent by the server")
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end
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{:error, e} ->
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conn |> put_status(:internal_server_error) |> text(e)
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end
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end
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@doc """
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Creates an empty pack named `name` which then can be updated via the admin UI.
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"""
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def create(conn, %{"name" => name}) do
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pack_dir = Path.join(@emoji_dir_path, name)
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unless File.exists?(pack_dir) do
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File.mkdir_p!(pack_dir)
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pack_file_p = Path.join(pack_dir, "pack.json")
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File.write!(
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pack_file_p,
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Jason.encode!(%{pack: %{}, files: %{}})
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)
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conn |> text("ok")
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else
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conn
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|> put_status(:conflict)
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|> text("A pack named \"#{name}\" already exists")
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end
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end
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@doc """
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Deletes the pack `name` and all it's files.
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"""
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def delete(conn, %{"name" => name}) do
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pack_dir = Path.join(@emoji_dir_path, name)
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case File.rm_rf(pack_dir) do
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{:ok, _} ->
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conn |> text("ok")
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{:error, _} ->
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conn |> put_status(:internal_server_error) |> text("Couldn't delete the pack #{name}")
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end
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end
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@doc """
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An endpoint to update `pack_names`'s metadata.
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`new_data` is the new metadata for the pack, that will replace the old metadata.
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"""
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def update_metadata(conn, %{"pack_name" => name, "new_data" => new_data}) do
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pack_dir = Path.join(@emoji_dir_path, name)
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pack_file_p = Path.join(pack_dir, "pack.json")
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full_pack = Jason.decode!(File.read!(pack_file_p))
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# The new fallback-src is in the new data and it's not the same as it was in the old data
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should_update_fb_sha =
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not is_nil(new_data["fallback-src"]) and
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new_data["fallback-src"] != full_pack["pack"]["fallback-src"]
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new_data =
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if should_update_fb_sha do
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pack_arch = Tesla.get!(new_data["fallback-src"]).body
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{:ok, flist} = :zip.unzip(pack_arch, [:memory])
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# Check if all files from the pack.json are in the archive
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has_all_files =
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Enum.all?(full_pack["files"], fn {_, from_manifest} ->
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Enum.find(flist, fn {from_archive, _} ->
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to_string(from_archive) == from_manifest
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end)
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end)
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unless has_all_files do
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{:error,
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conn
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|> put_status(:bad_request)
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|> text("The fallback archive does not have all files specified in pack.json")}
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else
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fallback_sha = :crypto.hash(:sha256, pack_arch) |> Base.encode16()
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{:ok, new_data |> Map.put("fallback-src-sha256", fallback_sha)}
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end
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else
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{:ok, new_data}
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end
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case new_data do
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{:ok, new_data} ->
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full_pack = Map.put(full_pack, "pack", new_data)
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File.write!(pack_file_p, Jason.encode!(full_pack, pretty: true))
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# Send new data back with fallback sha filled
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conn |> json(new_data)
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{:error, e} ->
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e
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end
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end
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@doc """
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Updates a file in a pack.
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Updating can mean three things:
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- `add` adds an emoji named `shortcode` to the pack `pack_name`,
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that means that the emoji file needs to be uploaded with the request
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(thus requiring it to be a multipart request) and be named `file`.
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There can also be an optional `filename` that will be the new emoji file name
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(if it's not there, the name will be taken from the uploaded file).
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- `update` changes emoji shortcode (from `shortcode` to `new_shortcode` or moves the file
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(from the current filename to `new_filename`)
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- `remove` removes the emoji named `shortcode` and it's associated file
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"""
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def update_file(
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conn,
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%{"pack_name" => pack_name, "action" => action, "shortcode" => shortcode} = params
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) do
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pack_dir = Path.join(@emoji_dir_path, pack_name)
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pack_file_p = Path.join(pack_dir, "pack.json")
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full_pack = Jason.decode!(File.read!(pack_file_p))
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res =
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case action do
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"add" ->
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unless Map.has_key?(full_pack["files"], shortcode) do
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filename =
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if Map.has_key?(params, "filename") do
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params["filename"]
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else
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case params["file"] do
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%Plug.Upload{filename: filename} -> filename
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url when is_binary(url) -> Path.basename(url)
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end
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end
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unless String.trim(shortcode) |> String.length() == 0 or
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String.trim(filename) |> String.length() == 0 do
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file_path = Path.join(pack_dir, filename)
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# If the name contains directories, create them
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if String.contains?(file_path, "/") do
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File.mkdir_p!(Path.dirname(file_path))
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end
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case params["file"] do
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%Plug.Upload{path: upload_path} ->
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# Copy the uploaded file from the temporary directory
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File.copy!(upload_path, file_path)
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url when is_binary(url) ->
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# Download and write the file
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file_contents = Tesla.get!(url).body
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File.write!(file_path, file_contents)
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end
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updated_full_pack = put_in(full_pack, ["files", shortcode], filename)
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{:ok, updated_full_pack}
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else
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{:error,
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conn
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|> put_status(:bad_request)
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|> text("shortcode or filename cannot be empty")}
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end
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else
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{:error,
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conn
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|> put_status(:conflict)
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|> text("An emoji with the \"#{shortcode}\" shortcode already exists")}
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end
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"remove" ->
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if Map.has_key?(full_pack["files"], shortcode) do
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{emoji_file_path, updated_full_pack} = pop_in(full_pack, ["files", shortcode])
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emoji_file_path = Path.join(pack_dir, emoji_file_path)
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# Delete the emoji file
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File.rm!(emoji_file_path)
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# If the old directory has no more files, remove it
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if String.contains?(emoji_file_path, "/") do
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dir = Path.dirname(emoji_file_path)
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if Enum.empty?(File.ls!(dir)) do
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File.rmdir!(dir)
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end
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end
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{:ok, updated_full_pack}
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else
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{:error,
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conn |> put_status(:bad_request) |> text("Emoji \"#{shortcode}\" does not exist")}
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end
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"update" ->
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if Map.has_key?(full_pack["files"], shortcode) do
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with %{"new_shortcode" => new_shortcode, "new_filename" => new_filename} <- params do
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unless String.trim(new_shortcode) |> String.length() == 0 or
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String.trim(new_filename) |> String.length() == 0 do
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# First, remove the old shortcode, saving the old path
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{old_emoji_file_path, updated_full_pack} = pop_in(full_pack, ["files", shortcode])
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old_emoji_file_path = Path.join(pack_dir, old_emoji_file_path)
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new_emoji_file_path = Path.join(pack_dir, new_filename)
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# If the name contains directories, create them
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if String.contains?(new_emoji_file_path, "/") do
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File.mkdir_p!(Path.dirname(new_emoji_file_path))
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end
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# Move/Rename the old filename to a new filename
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# These are probably on the same filesystem, so just rename should work
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:ok = File.rename(old_emoji_file_path, new_emoji_file_path)
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# If the old directory has no more files, remove it
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if String.contains?(old_emoji_file_path, "/") do
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dir = Path.dirname(old_emoji_file_path)
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if Enum.empty?(File.ls!(dir)) do
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File.rmdir!(dir)
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end
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end
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# Then, put in the new shortcode with the new path
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updated_full_pack =
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put_in(updated_full_pack, ["files", new_shortcode], new_filename)
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{:ok, updated_full_pack}
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else
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{:error,
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conn
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|> put_status(:bad_request)
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|> text("new_shortcode or new_filename cannot be empty")}
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end
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else
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_ ->
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{:error,
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conn
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|> put_status(:bad_request)
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|> text("new_shortcode or new_file were not specified")}
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end
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else
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{:error,
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conn |> put_status(:bad_request) |> text("Emoji \"#{shortcode}\" does not exist")}
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end
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_ ->
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{:error, conn |> put_status(:bad_request) |> text("Unknown action: #{action}")}
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end
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case res do
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{:ok, updated_full_pack} ->
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# Write the emoji pack file
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File.write!(pack_file_p, Jason.encode!(updated_full_pack, pretty: true))
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# Return the modified file list
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conn |> json(updated_full_pack["files"])
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{:error, e} ->
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e
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end
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end
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@doc """
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Imports emoji from the filesystem.
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Importing means checking all the directories in the
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`$instance_static/emoji/` for directories which do not have
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`pack.json`. If one has an emoji.txt file, that file will be used
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to create a `pack.json` file with it's contents. If the directory has
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neither, all the files with specific configured extenstions will be
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assumed to be emojis and stored in the new `pack.json` file.
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"""
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def import_from_fs(conn, _params) do
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case File.ls(@emoji_dir_path) do
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{:error, _} ->
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conn
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|> put_status(:internal_server_error)
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|> text("Error accessing emoji pack directory")
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{:ok, results} ->
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imported_pack_names =
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results
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|> Enum.filter(fn file ->
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dir_path = Path.join(@emoji_dir_path, file)
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# Find the directories that do NOT have pack.json
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File.dir?(dir_path) and not File.exists?(Path.join(dir_path, "pack.json"))
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end)
|
|
|> Enum.map(fn dir ->
|
|
dir_path = Path.join(@emoji_dir_path, dir)
|
|
emoji_txt_path = Path.join(dir_path, "emoji.txt")
|
|
|
|
files_for_pack =
|
|
if File.exists?(emoji_txt_path) do
|
|
# There's an emoji.txt file, it's likely from a pack installed by the pack manager.
|
|
# Make a pack.json file from the contents of that emoji.txt fileh
|
|
|
|
# FIXME: Copy-pasted from Pleroma.Emoji/load_from_file_stream/2
|
|
|
|
# Create a map of shortcodes to filenames from emoji.txt
|
|
|
|
File.read!(emoji_txt_path)
|
|
|> String.split("\n")
|
|
|> Enum.map(&String.trim/1)
|
|
|> Enum.map(fn line ->
|
|
case String.split(line, ~r/,\s*/) do
|
|
# This matches both strings with and without tags
|
|
# and we don't care about tags here
|
|
[name, file | _] ->
|
|
{name, file}
|
|
|
|
_ ->
|
|
nil
|
|
end
|
|
end)
|
|
|> Enum.filter(fn x -> not is_nil(x) end)
|
|
|> Enum.into(%{})
|
|
else
|
|
# If there's no emoji.txt, assume all files
|
|
# that are of certain extensions from the config are emojis and import them all
|
|
Pleroma.Emoji.make_shortcode_to_file_map(
|
|
dir_path,
|
|
Pleroma.Config.get!([:emoji, :pack_extensions])
|
|
)
|
|
end
|
|
|
|
pack_json_contents = Jason.encode!(%{pack: %{}, files: files_for_pack})
|
|
|
|
File.write!(
|
|
Path.join(dir_path, "pack.json"),
|
|
pack_json_contents
|
|
)
|
|
|
|
dir
|
|
end)
|
|
|
|
conn |> json(imported_pack_names)
|
|
end
|
|
end
|
|
end
|