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Diffstat (limited to 'lib/pleroma/emoji/pack.ex')
| -rw-r--r-- | lib/pleroma/emoji/pack.ex | 507 |
1 files changed, 507 insertions, 0 deletions
diff --git a/lib/pleroma/emoji/pack.ex b/lib/pleroma/emoji/pack.ex new file mode 100644 index 000000000..242344374 --- /dev/null +++ b/lib/pleroma/emoji/pack.ex @@ -0,0 +1,507 @@ +defmodule Pleroma.Emoji.Pack do + @derive {Jason.Encoder, only: [:files, :pack]} + defstruct files: %{}, + pack_file: nil, + path: nil, + pack: %{}, + name: nil + + @type t() :: %__MODULE__{ + files: %{String.t() => Path.t()}, + pack_file: Path.t(), + path: Path.t(), + pack: map(), + name: String.t() + } + + alias Pleroma.Emoji + + @spec emoji_path() :: Path.t() + def emoji_path do + static = Pleroma.Config.get!([:instance, :static_dir]) + Path.join(static, "emoji") + end + + @spec create(String.t()) :: :ok | {:error, File.posix()} | {:error, :empty_values} + def create(name) when byte_size(name) > 0 do + dir = Path.join(emoji_path(), name) + + with :ok <- File.mkdir(dir) do + %__MODULE__{ + pack_file: Path.join(dir, "pack.json") + } + |> save_pack() + end + end + + def create(_), do: {:error, :empty_values} + + @spec show(String.t()) :: {:ok, t()} | {:loaded, nil} | {:error, :empty_values} + def show(name) when byte_size(name) > 0 do + with {_, %__MODULE__{} = pack} <- {:loaded, load_pack(name)}, + {_, pack} <- validate_pack(pack) do + {:ok, pack} + end + end + + def show(_), do: {:error, :empty_values} + + @spec delete(String.t()) :: + {:ok, [binary()]} | {:error, File.posix(), binary()} | {:error, :empty_values} + def delete(name) when byte_size(name) > 0 do + emoji_path() + |> Path.join(name) + |> File.rm_rf() + end + + def delete(_), do: {:error, :empty_values} + + @spec add_file(String.t(), String.t(), Path.t(), Plug.Upload.t() | String.t()) :: + {:ok, t()} | {:error, File.posix()} | {:error, :empty_values} + def add_file(name, shortcode, filename, file) + when byte_size(name) > 0 and byte_size(shortcode) > 0 and byte_size(filename) > 0 do + with {_, nil} <- {:exists, Emoji.get(shortcode)}, + {_, %__MODULE__{} = pack} <- {:loaded, load_pack(name)} do + file_path = Path.join(pack.path, filename) + + create_subdirs(file_path) + + case file do + %Plug.Upload{path: upload_path} -> + # Copy the uploaded file from the temporary directory + File.copy!(upload_path, file_path) + + url when is_binary(url) -> + # Download and write the file + file_contents = Tesla.get!(url).body + File.write!(file_path, file_contents) + end + + files = Map.put(pack.files, shortcode, filename) + + updated_pack = %{pack | files: files} + + case save_pack(updated_pack) do + :ok -> + Emoji.reload() + {:ok, updated_pack} + + e -> + e + end + end + end + + def add_file(_, _, _, _), do: {:error, :empty_values} + + defp create_subdirs(file_path) do + if String.contains?(file_path, "/") do + file_path + |> Path.dirname() + |> File.mkdir_p!() + end + end + + @spec delete_file(String.t(), String.t()) :: + {:ok, t()} | {:error, File.posix()} | {:error, :empty_values} + def delete_file(name, shortcode) when byte_size(name) > 0 and byte_size(shortcode) > 0 do + with {_, %__MODULE__{} = pack} <- {:loaded, load_pack(name)}, + {_, {filename, files}} when not is_nil(filename) <- + {:exists, Map.pop(pack.files, shortcode)}, + emoji <- Path.join(pack.path, filename), + {_, true} <- {:exists, File.exists?(emoji)} do + emoji_dir = Path.dirname(emoji) + + File.rm!(emoji) + + if String.contains?(filename, "/") and File.ls!(emoji_dir) == [] do + File.rmdir!(emoji_dir) + end + + updated_pack = %{pack | files: files} + + case save_pack(updated_pack) do + :ok -> + Emoji.reload() + {:ok, updated_pack} + + e -> + e + end + end + end + + def delete_file(_, _), do: {:error, :empty_values} + + @spec update_file(String.t(), String.t(), String.t(), String.t(), boolean()) :: + {:ok, t()} | {:error, File.posix()} | {:error, :empty_values} + def update_file(name, shortcode, new_shortcode, new_filename, force) + when byte_size(name) > 0 and byte_size(shortcode) > 0 and byte_size(new_shortcode) > 0 and + byte_size(new_filename) > 0 do + with {_, %__MODULE__{} = pack} <- {:loaded, load_pack(name)}, + {_, {filename, files}} when not is_nil(filename) <- + {:exists, Map.pop(pack.files, shortcode)}, + {_, true} <- {:not_used, force or is_nil(Emoji.get(new_shortcode))} do + old_path = Path.join(pack.path, filename) + old_dir = Path.dirname(old_path) + new_path = Path.join(pack.path, new_filename) + + create_subdirs(new_path) + + :ok = File.rename(old_path, new_path) + + if String.contains?(filename, "/") and File.ls!(old_dir) == [] do + File.rmdir!(old_dir) + end + + files = Map.put(files, new_shortcode, new_filename) + + updated_pack = %{pack | files: files} + + case save_pack(updated_pack) do + :ok -> + Emoji.reload() + {:ok, updated_pack} + + e -> + e + end + end + end + + def update_file(_, _, _, _, _), do: {:error, :empty_values} + + @spec import_from_filesystem() :: {:ok, [String.t()]} | {:error, atom()} + def import_from_filesystem do + emoji_path = emoji_path() + + with {:ok, %{access: :read_write}} <- File.stat(emoji_path), + {:ok, results} <- File.ls(emoji_path) do + names = + results + |> Enum.map(&Path.join(emoji_path, &1)) + |> Enum.reject(fn path -> + File.dir?(path) and File.exists?(Path.join(path, "pack.json")) + end) + |> Enum.map(&write_pack_contents/1) + |> Enum.filter(& &1) + + {:ok, names} + else + {:ok, %{access: _}} -> {:error, :no_read_write} + e -> e + end + end + + defp write_pack_contents(path) do + pack = %__MODULE__{ + files: files_from_path(path), + path: path, + pack_file: Path.join(path, "pack.json") + } + + case save_pack(pack) do + :ok -> Path.basename(path) + _ -> nil + end + end + + defp files_from_path(path) do + txt_path = Path.join(path, "emoji.txt") + + if File.exists?(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 file + + # FIXME: Copy-pasted from Pleroma.Emoji/load_from_file_stream/2 + + # Create a map of shortcodes to filenames from emoji.txt + File.read!(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 | _] -> + file_dir_name = Path.dirname(file) + + file = + if String.ends_with?(path, file_dir_name) do + Path.basename(file) + else + file + end + + {name, file} + + _ -> + nil + end + end) + |> Enum.filter(& &1) + |> 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 + pack_extensions = Pleroma.Config.get!([:emoji, :pack_extensions]) + Emoji.Loader.make_shortcode_to_file_map(path, pack_extensions) + end + end + + @spec list_remote(String.t()) :: {:ok, map()} + def list_remote(url) do + uri = + url + |> String.trim() + |> URI.parse() + + with {_, true} <- {:shareable, shareable_packs_available?(uri)} do + packs = + uri + |> URI.merge("/api/pleroma/emoji/packs") + |> to_string() + |> Tesla.get!() + |> Map.get(:body) + |> Jason.decode!() + + {:ok, packs} + end + end + + @spec list_local() :: {:ok, map()} + def list_local do + emoji_path = emoji_path() + + # Create the directory first if it does not exist. This is probably the first request made + # with the API so it should be sufficient + with {:create_dir, :ok} <- {:create_dir, File.mkdir_p(emoji_path)}, + {:ls, {:ok, results}} <- {:ls, File.ls(emoji_path)} do + packs = + results + |> Enum.map(&load_pack/1) + |> Enum.filter(& &1) + |> Enum.map(&validate_pack/1) + |> Map.new() + + {:ok, packs} + end + end + + defp validate_pack(pack) do + if downloadable?(pack) do + archive = fetch_archive(pack) + archive_sha = :crypto.hash(:sha256, archive) |> Base.encode16() + + info = + pack.pack + |> Map.put("can-download", true) + |> Map.put("download-sha256", archive_sha) + + {pack.name, Map.put(pack, :pack, info)} + else + info = Map.put(pack.pack, "can-download", false) + {pack.name, Map.put(pack, :pack, info)} + end + end + + defp downloadable?(pack) do + # If the pack is set as shared, check if it can be downloaded + # That means that when asked, the pack can be packed and sent to the remote + # Otherwise, they'd have to download it from external-src + pack.pack["share-files"] && + Enum.all?(pack.files, fn {_, file} -> + File.exists?(Path.join(pack.path, file)) + end) + end + + @spec get_archive(String.t()) :: {:ok, binary()} + def get_archive(name) do + with {_, %__MODULE__{} = pack} <- {:exists?, load_pack(name)}, + {_, true} <- {:can_download?, downloadable?(pack)} do + {:ok, fetch_archive(pack)} + end + end + + defp fetch_archive(pack) do + hash = :crypto.hash(:md5, File.read!(pack.pack_file)) + + case Cachex.get!(:emoji_packs_cache, pack.name) do + %{hash: ^hash, pack_data: archive} -> + archive + + _ -> + create_archive_and_cache(pack, hash) + end + end + + defp create_archive_and_cache(pack, hash) do + files = ['pack.json' | Enum.map(pack.files, fn {_, file} -> to_charlist(file) end)] + + {:ok, {_, result}} = + :zip.zip('#{pack.name}.zip', files, [:memory, cwd: to_charlist(pack.path)]) + + ttl_per_file = Pleroma.Config.get!([:emoji, :shared_pack_cache_seconds_per_file]) + overall_ttl = :timer.seconds(ttl_per_file * Enum.count(files)) + + Cachex.put!( + :emoji_packs_cache, + pack.name, + # if pack.json MD5 changes, the cache is not valid anymore + %{hash: hash, pack_data: result}, + # Add a minute to cache time for every file in the pack + ttl: overall_ttl + ) + + result + end + + @spec download(String.t(), String.t(), String.t()) :: :ok + def download(name, url, as) do + uri = + url + |> String.trim() + |> URI.parse() + + with {_, true} <- {:shareable, shareable_packs_available?(uri)} do + remote_pack = + uri + |> URI.merge("/api/pleroma/emoji/packs/#{name}") + |> to_string() + |> Tesla.get!() + |> Map.get(:body) + |> Jason.decode!() + + result = + case remote_pack["pack"] do + %{"share-files" => true, "can-download" => true, "download-sha256" => sha} -> + {:ok, + %{ + sha: sha, + url: URI.merge(uri, "/api/pleroma/emoji/packs/#{name}/archive") |> to_string() + }} + + %{"fallback-src" => src, "fallback-src-sha256" => sha} when is_binary(src) -> + {:ok, + %{ + sha: sha, + url: src, + fallback: true + }} + + _ -> + {:error, + "The pack was not set as shared and there is no fallback src to download from"} + end + + with {:ok, %{sha: sha, url: url} = pinfo} <- result, + %{body: archive} <- Tesla.get!(url), + {_, true} <- {:checksum, Base.decode16!(sha) == :crypto.hash(:sha256, archive)} do + local_name = as || name + + path = Path.join(emoji_path(), local_name) + + pack = %__MODULE__{ + name: local_name, + path: path, + files: remote_pack["files"], + pack_file: Path.join(path, "pack.json") + } + + File.mkdir_p!(pack.path) + + files = Enum.map(remote_pack["files"], fn {_, path} -> to_charlist(path) end) + # Fallback cannot contain a pack.json file + files = if pinfo[:fallback], do: files, else: ['pack.json' | files] + + {:ok, _} = :zip.unzip(archive, cwd: to_charlist(pack.path), file_list: files) + + # Fallback can't contain a pack.json file, since that would cause the fallback-src-sha256 + # in it to depend on itself + if pinfo[:fallback] do + save_pack(pack) + end + + :ok + end + end + end + + defp save_pack(pack), do: File.write(pack.pack_file, Jason.encode!(pack, pretty: true)) + + @spec save_metadata(map(), t()) :: {:ok, t()} | {:error, File.posix()} + def save_metadata(metadata, %__MODULE__{} = pack) do + pack = Map.put(pack, :pack, metadata) + + with :ok <- save_pack(pack) do + {:ok, pack} + end + end + + @spec update_metadata(String.t(), map()) :: {:ok, t()} | {:error, File.posix()} + def update_metadata(name, data) do + pack = load_pack(name) + + fb_sha_changed? = + not is_nil(data["fallback-src"]) and data["fallback-src"] != pack.pack["fallback-src"] + + with {_, true} <- {:update?, fb_sha_changed?}, + {:ok, %{body: zip}} <- Tesla.get(data["fallback-src"]), + {:ok, f_list} <- :zip.unzip(zip, [:memory]), + {_, true} <- {:has_all_files?, has_all_files?(pack.files, f_list)} do + fallback_sha = :crypto.hash(:sha256, zip) |> Base.encode16() + + data + |> Map.put("fallback-src-sha256", fallback_sha) + |> save_metadata(pack) + else + {:update?, _} -> save_metadata(data, pack) + e -> e + end + end + + # Check if all files from the pack.json are in the archive + defp has_all_files?(files, f_list) do + Enum.all?(files, fn {_, from_manifest} -> + List.keyfind(f_list, to_charlist(from_manifest), 0) + end) + end + + @spec load_pack(String.t()) :: t() | nil + def load_pack(name) do + pack_file = Path.join([emoji_path(), name, "pack.json"]) + + if File.exists?(pack_file) do + pack_file + |> File.read!() + |> from_json() + |> Map.put(:pack_file, pack_file) + |> Map.put(:path, Path.dirname(pack_file)) + |> Map.put(:name, name) + end + end + + defp from_json(json) do + map = Jason.decode!(json) + + struct(__MODULE__, %{files: map["files"], pack: map["pack"]}) + end + + defp shareable_packs_available?(uri) do + uri + |> URI.merge("/.well-known/nodeinfo") + |> to_string() + |> Tesla.get!() + |> Map.get(:body) + |> Jason.decode!() + |> Map.get("links") + |> List.last() + |> Map.get("href") + # Get the actual nodeinfo address and fetch it + |> Tesla.get!() + |> Map.get(:body) + |> Jason.decode!() + |> get_in(["metadata", "features"]) + |> Enum.member?("shareable_emoji_packs") + end +end |