Merge branch 'develop' of git.pleroma.social:pleroma/pleroma into remake-remodel-dms

32 files changed, 1411 insertions, 789 deletions

diff --git a/lib/pleroma/application.ex b/lib/pleroma/application.ex
index a00938c04..308d8cffa 100644
--- a/lib/pleroma/application.ex
+++ b/lib/pleroma/application.ex
@@ -73,7 +73,6 @@ defmodule Pleroma.Application do
         Pleroma.Repo,
         Config.TransferTask,
         Pleroma.Emoji,
-        Pleroma.Captcha,
         Pleroma.Plugs.RateLimiter.Supervisor
       ] ++
         cachex_children() ++
diff --git a/lib/pleroma/captcha/captcha.ex b/lib/pleroma/captcha/captcha.ex
index cf75c3adc..6ab754b6f 100644
--- a/lib/pleroma/captcha/captcha.ex
+++ b/lib/pleroma/captcha/captcha.ex
@@ -3,53 +3,22 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Captcha do
-  import Pleroma.Web.Gettext
-
   alias Calendar.DateTime
   alias Plug.Crypto.KeyGenerator
   alias Plug.Crypto.MessageEncryptor
 
-  use GenServer
-
-  @doc false
-  def start_link(_) do
-    GenServer.start_link(__MODULE__, [], name: __MODULE__)
-  end
-
-  @doc false
-  def init(_) do
-    {:ok, nil}
-  end
-
   @doc """
   Ask the configured captcha service for a new captcha
   """
   def new do
-    GenServer.call(__MODULE__, :new)
-  end
-
-  @doc """
-  Ask the configured captcha service to validate the captcha
-  """
-  def validate(token, captcha, answer_data) do
-    GenServer.call(__MODULE__, {:validate, token, captcha, answer_data})
-  end
-
-  @doc false
-  def handle_call(:new, _from, state) do
-    enabled = Pleroma.Config.get([__MODULE__, :enabled])
-
-    if !enabled do
-      {:reply, %{type: :none}, state}
+    if not enabled?() do
+      %{type: :none}
     else
       new_captcha = method().new()
 
-      secret_key_base = Pleroma.Config.get!([Pleroma.Web.Endpoint, :secret_key_base])
-
       # This make salt a little different for two keys
-      token = new_captcha[:token]
-      secret = KeyGenerator.generate(secret_key_base, token <> "_encrypt")
-      sign_secret = KeyGenerator.generate(secret_key_base, token <> "_sign")
+      {secret, sign_secret} = secret_pair(new_captcha[:token])
+
       # Basically copy what Phoenix.Token does here, add the time to
       # the actual data and make it a binary to then encrypt it
       encrypted_captcha_answer =
@@ -60,55 +29,73 @@ defmodule Pleroma.Captcha do
         |> :erlang.term_to_binary()
         |> MessageEncryptor.encrypt(secret, sign_secret)
 
-      {
-        :reply,
-        # Replace the answer with the encrypted answer
-        %{new_captcha | answer_data: encrypted_captcha_answer},
-        state
-      }
+      # Replace the answer with the encrypted answer
+      %{new_captcha | answer_data: encrypted_captcha_answer}
     end
   end
 
-  @doc false
-  def handle_call({:validate, token, captcha, answer_data}, _from, state) do
+  @doc """
+  Ask the configured captcha service to validate the captcha
+  """
+  def validate(token, captcha, answer_data) do
+    with {:ok, %{at: at, answer_data: answer_md5}} <- validate_answer_data(token, answer_data),
+         :ok <- validate_expiration(at),
+         :ok <- validate_usage(token),
+         :ok <- method().validate(token, captcha, answer_md5),
+         {:ok, _} <- mark_captcha_as_used(token) do
+      :ok
+    end
+  end
+
+  def enabled?, do: Pleroma.Config.get([__MODULE__, :enabled], false)
+
+  defp seconds_valid, do: Pleroma.Config.get!([__MODULE__, :seconds_valid])
+
+  defp secret_pair(token) do
     secret_key_base = Pleroma.Config.get!([Pleroma.Web.Endpoint, :secret_key_base])
     secret = KeyGenerator.generate(secret_key_base, token <> "_encrypt")
     sign_secret = KeyGenerator.generate(secret_key_base, token <> "_sign")
 
+    {secret, sign_secret}
+  end
+
+  defp validate_answer_data(token, answer_data) do
+    {secret, sign_secret} = secret_pair(token)
+
+    with false <- is_nil(answer_data),
+         {:ok, data} <- MessageEncryptor.decrypt(answer_data, secret, sign_secret),
+         %{at: at, answer_data: answer_md5} <- :erlang.binary_to_term(data) do
+      {:ok, %{at: at, answer_data: answer_md5}}
+    else
+      _ -> {:error, :invalid_answer_data}
+    end
+  end
+
+  defp validate_expiration(created_at) do
     # If the time found is less than (current_time-seconds_valid) then the time has already passed
     # Later we check that the time found is more than the presumed invalidatation time, that means
     # that the data is still valid and the captcha can be checked
-    seconds_valid = Pleroma.Config.get!([Pleroma.Captcha, :seconds_valid])
-    valid_if_after = DateTime.subtract!(DateTime.now_utc(), seconds_valid)
-
-    result =
-      with false <- is_nil(answer_data),
-           {:ok, data} <- MessageEncryptor.decrypt(answer_data, secret, sign_secret),
-           %{at: at, answer_data: answer_md5} <- :erlang.binary_to_term(data) do
-        try do
-          if DateTime.before?(at, valid_if_after),
-            do: throw({:error, dgettext("errors", "CAPTCHA expired")})
-
-          if not is_nil(Cachex.get!(:used_captcha_cache, token)),
-            do: throw({:error, dgettext("errors", "CAPTCHA already used")})
-
-          res = method().validate(token, captcha, answer_md5)
-          # Throw if an error occurs
-          if res != :ok, do: throw(res)
-
-          # Mark this captcha as used
-          {:ok, _} =
-            Cachex.put(:used_captcha_cache, token, true, ttl: :timer.seconds(seconds_valid))
-
-          :ok
-        catch
-          :throw, e -> e
-        end
-      else
-        _ -> {:error, dgettext("errors", "Invalid answer data")}
-      end
-
-    {:reply, result, state}
+
+    valid_if_after = DateTime.subtract!(DateTime.now_utc(), seconds_valid())
+
+    if DateTime.before?(created_at, valid_if_after) do
+      {:error, :expired}
+    else
+      :ok
+    end
+  end
+
+  defp validate_usage(token) do
+    if is_nil(Cachex.get!(:used_captcha_cache, token)) do
+      :ok
+    else
+      {:error, :already_used}
+    end
+  end
+
+  defp mark_captcha_as_used(token) do
+    ttl = seconds_valid() |> :timer.seconds()
+    Cachex.put(:used_captcha_cache, token, true, ttl: ttl)
   end
 
   defp method, do: Pleroma.Config.get!([__MODULE__, :method])
diff --git a/lib/pleroma/captcha/kocaptcha.ex b/lib/pleroma/captcha/kocaptcha.ex
index 06ceb20b6..6bc2fa158 100644
--- a/lib/pleroma/captcha/kocaptcha.ex
+++ b/lib/pleroma/captcha/kocaptcha.ex
@@ -3,7 +3,6 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Captcha.Kocaptcha do
-  import Pleroma.Web.Gettext
   alias Pleroma.Captcha.Service
   @behaviour Service
 
@@ -13,7 +12,7 @@ defmodule Pleroma.Captcha.Kocaptcha do
 
     case Tesla.get(endpoint <> "/new") do
       {:error, _} ->
-        %{error: dgettext("errors", "Kocaptcha service unavailable")}
+        %{error: :kocaptcha_service_unavailable}
 
       {:ok, res} ->
         json_resp = Jason.decode!(res.body)
@@ -33,6 +32,6 @@ defmodule Pleroma.Captcha.Kocaptcha do
     if not is_nil(captcha) and
          :crypto.hash(:md5, captcha) |> Base.encode16() == String.upcase(answer_data),
        do: :ok,
-       else: {:error, dgettext("errors", "Invalid CAPTCHA")}
+       else: {:error, :invalid}
   end
 end
diff --git a/lib/pleroma/captcha/native.ex b/lib/pleroma/captcha/native.ex
index 06c479ca9..a90631d61 100644
--- a/lib/pleroma/captcha/native.ex
+++ b/lib/pleroma/captcha/native.ex
@@ -3,7 +3,6 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Captcha.Native do
-  import Pleroma.Web.Gettext
   alias Pleroma.Captcha.Service
   @behaviour Service
 
@@ -11,7 +10,7 @@ defmodule Pleroma.Captcha.Native do
   def new do
     case Captcha.get() do
       :error ->
-        %{error: dgettext("errors", "Captcha error")}
+        %{error: :captcha_error}
 
       {:ok, answer_data, img_binary} ->
         %{
@@ -25,7 +24,7 @@ defmodule Pleroma.Captcha.Native do
 
   @impl Service
   def validate(_token, captcha, captcha) when not is_nil(captcha), do: :ok
-  def validate(_token, _captcha, _answer), do: {:error, dgettext("errors", "Invalid CAPTCHA")}
+  def validate(_token, _captcha, _answer), do: {:error, :invalid}
 
   defp token do
     10
diff --git a/lib/pleroma/constants.ex b/lib/pleroma/constants.ex
index 4ba39b53f..3a9eec5ea 100644
--- a/lib/pleroma/constants.ex
+++ b/lib/pleroma/constants.ex
@@ -20,4 +20,9 @@ defmodule Pleroma.Constants do
       "deleted_activity_id"
     ]
   )
+
+  const(static_only_files,
+    do:
+      ~w(index.html robots.txt static static-fe finmoji emoji packs sounds images instance sw.js sw-pleroma.js favicon.png schemas doc)
+  )
 end
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
diff --git a/lib/pleroma/following_relationship.ex b/lib/pleroma/following_relationship.ex
index 9ccf40495..3a3082e72 100644
--- a/lib/pleroma/following_relationship.ex
+++ b/lib/pleroma/following_relationship.ex
@@ -10,11 +10,12 @@ defmodule Pleroma.FollowingRelationship do
 
   alias Ecto.Changeset
   alias FlakeId.Ecto.CompatType
+  alias Pleroma.FollowingRelationship.State
   alias Pleroma.Repo
   alias Pleroma.User
 
   schema "following_relationships" do
-    field(:state, Pleroma.FollowingRelationship.State, default: :follow_pending)
+    field(:state, State, default: :follow_pending)
 
     belongs_to(:follower, User, type: CompatType)
     belongs_to(:following, User, type: CompatType)
@@ -22,6 +23,11 @@ defmodule Pleroma.FollowingRelationship do
     timestamps()
   end
 
+  @doc "Returns underlying integer code for state atom"
+  def state_int_code(state_atom), do: State.__enum_map__() |> Keyword.fetch!(state_atom)
+
+  def accept_state_code, do: state_int_code(:follow_accept)
+
   def changeset(%__MODULE__{} = following_relationship, attrs) do
     following_relationship
     |> cast(attrs, [:state])
@@ -82,6 +88,29 @@ defmodule Pleroma.FollowingRelationship do
     |> Repo.aggregate(:count, :id)
   end
 
+  def followers_query(%User{} = user) do
+    __MODULE__
+    |> join(:inner, [r], u in User, on: r.follower_id == u.id)
+    |> where([r], r.following_id == ^user.id)
+    |> where([r], r.state == ^:follow_accept)
+  end
+
+  def followers_ap_ids(%User{} = user, from_ap_ids \\ nil) do
+    query =
+      user
+      |> followers_query()
+      |> select([r, u], u.ap_id)
+
+    query =
+      if from_ap_ids do
+        where(query, [r, u], u.ap_id in ^from_ap_ids)
+      else
+        query
+      end
+
+    Repo.all(query)
+  end
+
   def following_count(%User{id: nil}), do: 0
 
   def following_count(%User{} = user) do
@@ -105,12 +134,16 @@ defmodule Pleroma.FollowingRelationship do
     |> Repo.exists?()
   end
 
+  def following_query(%User{} = user) do
+    __MODULE__
+    |> join(:inner, [r], u in User, on: r.following_id == u.id)
+    |> where([r], r.follower_id == ^user.id)
+    |> where([r], r.state == ^:follow_accept)
+  end
+
   def following(%User{} = user) do
     following =
-      __MODULE__
-      |> join(:inner, [r], u in User, on: r.following_id == u.id)
-      |> where([r], r.follower_id == ^user.id)
-      |> where([r], r.state == ^:follow_accept)
+      following_query(user)
       |> select([r, u], u.follower_address)
       |> Repo.all()
 
@@ -171,6 +204,30 @@ defmodule Pleroma.FollowingRelationship do
     end)
   end
 
+  @doc """
+  For a query with joined activity,
+  keeps rows where activity's actor is followed by user -or- is NOT domain-blocked by user.
+  """
+  def keep_following_or_not_domain_blocked(query, user) do
+    where(
+      query,
+      [_, activity],
+      fragment(
+        # "(actor's domain NOT in domain_blocks) OR (actor IS in followed AP IDs)"
+        """
+        NOT (substring(? from '.*://([^/]*)') = ANY(?)) OR
+          ? = ANY(SELECT ap_id FROM users AS u INNER JOIN following_relationships AS fr
+            ON u.id = fr.following_id WHERE fr.follower_id = ? AND fr.state = ?)
+        """,
+        activity.actor,
+        ^user.domain_blocks,
+        activity.actor,
+        ^User.binary_id(user.id),
+        ^accept_state_code()
+      )
+    )
+  end
+
   defp validate_not_self_relationship(%Changeset{} = changeset) do
     changeset
     |> validate_follower_id_following_id_inequality()
diff --git a/lib/pleroma/notification.ex b/lib/pleroma/notification.ex
index d96c12440..a2c870ded 100644
--- a/lib/pleroma/notification.ex
+++ b/lib/pleroma/notification.ex
@@ -6,6 +6,7 @@ defmodule Pleroma.Notification do
   use Ecto.Schema
 
   alias Pleroma.Activity
+  alias Pleroma.FollowingRelationship
   alias Pleroma.Notification
   alias Pleroma.Object
   alias Pleroma.Pagination
@@ -81,15 +82,13 @@ defmodule Pleroma.Notification do
     |> exclude_visibility(opts)
   end
 
+  # Excludes blocked users and non-followed domain-blocked users
   defp exclude_blocked(query, user, opts) do
     blocked_ap_ids = opts[:blocked_users_ap_ids] || User.blocked_users_ap_ids(user)
 
     query
     |> where([n, a], a.actor not in ^blocked_ap_ids)
-    |> where(
-      [n, a],
-      fragment("substring(? from '.*://([^/]*)')", a.actor) not in ^user.domain_blocks
-    )
+    |> FollowingRelationship.keep_following_or_not_domain_blocked(user)
   end
 
   defp exclude_notification_muted(query, _, %{@include_muted_option => true}) do
@@ -262,6 +261,16 @@ defmodule Pleroma.Notification do
     |> Repo.delete_all()
   end
 
+  def dismiss(%Pleroma.Activity{} = activity) do
+    Notification
+    |> where([n], n.activity_id == ^activity.id)
+    |> Repo.delete_all()
+    |> case do
+      {_, notifications} -> {:ok, notifications}
+      _ -> {:error, "Cannot dismiss notification"}
+    end
+  end
+
   def dismiss(%{id: user_id} = _user, id) do
     notification = Repo.get(Notification, id)
 
@@ -284,17 +293,8 @@ defmodule Pleroma.Notification do
     end
   end
 
-  def create_notifications(%Activity{data: %{"type" => "Follow"}} = activity) do
-    if Pleroma.Config.get([:notifications, :enable_follow_request_notifications]) ||
-         Activity.follow_accepted?(activity) do
-      do_create_notifications(activity)
-    else
-      {:ok, []}
-    end
-  end
-
   def create_notifications(%Activity{data: %{"type" => type}} = activity)
-      when type in ["Like", "Announce", "Move", "EmojiReact"] do
+      when type in ["Follow", "Like", "Announce", "Move", "EmojiReact"] do
     do_create_notifications(activity)
   end
 
@@ -330,10 +330,11 @@ defmodule Pleroma.Notification do
 
   @doc """
   Returns a tuple with 2 elements:
-    {enabled notification receivers, currently disabled receivers (blocking / [thread] muting)}
+    {notification-enabled receivers, currently disabled receivers (blocking / [thread] muting)}
 
   NOTE: might be called for FAKE Activities, see ActivityPub.Utils.get_notified_from_object/1
   """
+  @spec get_notified_from_activity(Activity.t(), boolean()) :: {list(User.t()), list(User.t())}
   def get_notified_from_activity(activity, local_only \\ true)
 
   def get_notified_from_activity(%Activity{data: %{"type" => type}} = activity, local_only)
@@ -346,17 +347,14 @@ defmodule Pleroma.Notification do
       |> Utils.maybe_notify_followers(activity)
       |> Enum.uniq()
 
-    # Since even subscribers and followers can mute / thread-mute, filtering all above AP IDs
+    potential_receivers = User.get_users_from_set(potential_receiver_ap_ids, local_only)
+
     notification_enabled_ap_ids =
       potential_receiver_ap_ids
+      |> exclude_domain_blocker_ap_ids(activity, potential_receivers)
       |> exclude_relationship_restricted_ap_ids(activity)
       |> exclude_thread_muter_ap_ids(activity)
 
-    potential_receivers =
-      potential_receiver_ap_ids
-      |> Enum.uniq()
-      |> User.get_users_from_set(local_only)
-
     notification_enabled_users =
       Enum.filter(potential_receivers, fn u -> u.ap_id in notification_enabled_ap_ids end)
 
@@ -365,6 +363,38 @@ defmodule Pleroma.Notification do
 
   def get_notified_from_activity(_, _local_only), do: {[], []}
 
+  @doc "Filters out AP IDs domain-blocking and not following the activity's actor"
+  def exclude_domain_blocker_ap_ids(ap_ids, activity, preloaded_users \\ [])
+
+  def exclude_domain_blocker_ap_ids([], _activity, _preloaded_users), do: []
+
+  def exclude_domain_blocker_ap_ids(ap_ids, %Activity{} = activity, preloaded_users) do
+    activity_actor_domain = activity.actor && URI.parse(activity.actor).host
+
+    users =
+      ap_ids
+      |> Enum.map(fn ap_id ->
+        Enum.find(preloaded_users, &(&1.ap_id == ap_id)) ||
+          User.get_cached_by_ap_id(ap_id)
+      end)
+      |> Enum.filter(& &1)
+
+    domain_blocker_ap_ids = for u <- users, activity_actor_domain in u.domain_blocks, do: u.ap_id
+
+    domain_blocker_follower_ap_ids =
+      if Enum.any?(domain_blocker_ap_ids) do
+        activity
+        |> Activity.user_actor()
+        |> FollowingRelationship.followers_ap_ids(domain_blocker_ap_ids)
+      else
+        []
+      end
+
+    ap_ids
+    |> Kernel.--(domain_blocker_ap_ids)
+    |> Kernel.++(domain_blocker_follower_ap_ids)
+  end
+
   @doc "Filters out AP IDs of users basing on their relationships with activity actor user"
   def exclude_relationship_restricted_ap_ids([], _activity), do: []
 
diff --git a/lib/pleroma/plugs/instance_static.ex b/lib/pleroma/plugs/instance_static.ex
index 927fa2663..7516f75c3 100644
--- a/lib/pleroma/plugs/instance_static.ex
+++ b/lib/pleroma/plugs/instance_static.ex
@@ -3,6 +3,8 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Plugs.InstanceStatic do
+  require Pleroma.Constants
+
   @moduledoc """
   This is a shim to call `Plug.Static` but with runtime `from` configuration.
 
@@ -21,9 +23,6 @@ defmodule Pleroma.Plugs.InstanceStatic do
     end
   end
 
-  @only ~w(index.html robots.txt static emoji packs sounds images instance favicon.png sw.js
-  sw-pleroma.js)
-
   def init(opts) do
     opts
     |> Keyword.put(:from, "__unconfigured_instance_static_plug")
@@ -31,7 +30,7 @@ defmodule Pleroma.Plugs.InstanceStatic do
     |> Plug.Static.init()
   end
 
-  for only <- @only do
+  for only <- Pleroma.Constants.static_only_files() do
     at = Plug.Router.Utils.split("/")
 
     def call(%{request_path: "/" <> unquote(only) <> _} = conn, opts) do
diff --git a/lib/pleroma/plugs/mapped_signature_to_identity_plug.ex b/lib/pleroma/plugs/mapped_signature_to_identity_plug.ex
index 84b7c5d83..f44d4dee5 100644
--- a/lib/pleroma/plugs/mapped_signature_to_identity_plug.ex
+++ b/lib/pleroma/plugs/mapped_signature_to_identity_plug.ex
@@ -13,8 +13,9 @@ defmodule Pleroma.Web.Plugs.MappedSignatureToIdentityPlug do
   def init(options), do: options
 
   defp key_id_from_conn(conn) do
-    with %{"keyId" => key_id} <- HTTPSignatures.signature_for_conn(conn) do
-      Signature.key_id_to_actor_id(key_id)
+    with %{"keyId" => key_id} <- HTTPSignatures.signature_for_conn(conn),
+         {:ok, ap_id} <- Signature.key_id_to_actor_id(key_id) do
+      ap_id
     else
       _ ->
         nil
diff --git a/lib/pleroma/signature.ex b/lib/pleroma/signature.ex
index 6b0b2c969..d01728361 100644
--- a/lib/pleroma/signature.ex
+++ b/lib/pleroma/signature.ex
@@ -8,6 +8,7 @@ defmodule Pleroma.Signature do
   alias Pleroma.Keys
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.ActivityPub.ObjectValidators.Types
 
   def key_id_to_actor_id(key_id) do
     uri =
@@ -21,12 +22,23 @@ defmodule Pleroma.Signature do
         uri
       end
 
-    URI.to_string(uri)
+    maybe_ap_id = URI.to_string(uri)
+
+    case Types.ObjectID.cast(maybe_ap_id) do
+      {:ok, ap_id} ->
+        {:ok, ap_id}
+
+      _ ->
+        case Pleroma.Web.WebFinger.finger(maybe_ap_id) do
+          %{"ap_id" => ap_id} -> {:ok, ap_id}
+          _ -> {:error, maybe_ap_id}
+        end
+    end
   end
 
   def fetch_public_key(conn) do
     with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn),
-         actor_id <- key_id_to_actor_id(kid),
+         {:ok, actor_id} <- key_id_to_actor_id(kid),
          {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
       {:ok, public_key}
     else
@@ -37,7 +49,7 @@ defmodule Pleroma.Signature do
 
   def refetch_public_key(conn) do
     with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn),
-         actor_id <- key_id_to_actor_id(kid),
+         {:ok, actor_id} <- key_id_to_actor_id(kid),
          {:ok, _user} <- ActivityPub.make_user_from_ap_id(actor_id),
          {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
       {:ok, public_key}
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index b451202b2..99358ddaf 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -1445,8 +1445,15 @@ defmodule Pleroma.User do
     end)
 
     delete_user_activities(user)
-    invalidate_cache(user)
-    Repo.delete(user)
+
+    if user.local do
+      user
+      |> change(%{deactivated: true, email: nil})
+      |> update_and_set_cache()
+    else
+      invalidate_cache(user)
+      Repo.delete(user)
+    end
   end
 
   def perform(:deactivate_async, user, status), do: deactivate(user, status)
diff --git a/lib/pleroma/web/activity_pub/activity_pub_controller.ex b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
index d625530ec..f607931ab 100644
--- a/lib/pleroma/web/activity_pub/activity_pub_controller.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
@@ -37,9 +37,10 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     [unless_func: &FederatingPlug.federating?/0] when action not in @federating_only_actions
   )
 
+  # Note: :following and :followers must be served even without authentication (as via :api)
   plug(
     EnsureAuthenticatedPlug
-    when action in [:read_inbox, :update_outbox, :whoami, :upload_media, :following, :followers]
+    when action in [:read_inbox, :update_outbox, :whoami, :upload_media]
   )
 
   plug(
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index d3a2e0362..7021d3f24 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -7,6 +7,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   A module to handle coding from internal to wire ActivityPub and back.
   """
   alias Pleroma.Activity
+  alias Pleroma.EarmarkRenderer
   alias Pleroma.FollowingRelationship
   alias Pleroma.Object
   alias Pleroma.Object.Containment
@@ -43,6 +44,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> fix_addressing
     |> fix_summary
     |> fix_type(options)
+    |> fix_content
   end
 
   def fix_summary(%{"summary" => nil} = object) do
@@ -357,6 +359,18 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def fix_type(object, _), do: object
 
+  defp fix_content(%{"mediaType" => "text/markdown", "content" => content} = object)
+       when is_binary(content) do
+    html_content =
+      content
+      |> Earmark.as_html!(%Earmark.Options{renderer: EarmarkRenderer})
+      |> Pleroma.HTML.filter_tags()
+
+    Map.merge(object, %{"content" => html_content, "mediaType" => "text/html"})
+  end
+
+  defp fix_content(object), do: object
+
   defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
     with true <- id =~ "follows",
          %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
@@ -1217,18 +1231,24 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def prepare_attachments(object) do
     attachments =
-      (object["attachment"] || [])
+      object
+      |> Map.get("attachment", [])
       |> Enum.map(fn data ->
         [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
-        %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
+
+        %{
+          "url" => href,
+          "mediaType" => media_type,
+          "name" => data["name"],
+          "type" => "Document"
+        }
       end)
 
     Map.put(object, "attachment", attachments)
   end
 
   def strip_internal_fields(object) do
-    object
-    |> Map.drop(Pleroma.Constants.object_internal_fields())
+    Map.drop(object, Pleroma.Constants.object_internal_fields())
   end
 
   defp strip_internal_tags(%{"tag" => tags} = object) do
diff --git a/lib/pleroma/web/api_spec/helpers.ex b/lib/pleroma/web/api_spec/helpers.ex
index ce40fb9e8..183df43ee 100644
--- a/lib/pleroma/web/api_spec/helpers.ex
+++ b/lib/pleroma/web/api_spec/helpers.ex
@@ -41,9 +41,17 @@ defmodule Pleroma.Web.ApiSpec.Helpers do
       Operation.parameter(
         :limit,
         :query,
-        %Schema{type: :integer, default: 20, maximum: 40},
-        "Limit"
+        %Schema{type: :integer, default: 20},
+        "Maximum number of items to return. Will be ignored if it's more than 40"
       )
     ]
   end
+
+  def empty_object_response do
+    Operation.response("Empty object", "application/json", %Schema{type: :object, example: %{}})
+  end
+
+  def empty_array_response do
+    Operation.response("Empty array", "application/json", %Schema{type: :array, example: []})
+  end
 end
diff --git a/lib/pleroma/web/api_spec/operations/account_operation.ex b/lib/pleroma/web/api_spec/operations/account_operation.ex
index 64e2e43c4..fe9548b1b 100644
--- a/lib/pleroma/web/api_spec/operations/account_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/account_operation.ex
@@ -131,6 +131,7 @@ defmodule Pleroma.Web.ApiSpec.AccountOperation do
             "Include statuses from muted acccounts."
           ),
           Operation.parameter(:exclude_reblogs, :query, BooleanLike, "Exclude reblogs"),
+          Operation.parameter(:exclude_replies, :query, BooleanLike, "Exclude replies"),
           Operation.parameter(
             :exclude_visibilities,
             :query,
@@ -343,7 +344,7 @@ defmodule Pleroma.Web.ApiSpec.AccountOperation do
       description: "Not implemented",
       security: [%{"oAuth" => ["read:accounts"]}],
       responses: %{
-        200 => Operation.response("Empry array", "application/json", %Schema{type: :array})
+        200 => empty_array_response()
       }
     }
   end
@@ -355,7 +356,7 @@ defmodule Pleroma.Web.ApiSpec.AccountOperation do
       operationId: "AccountController.identity_proofs",
       description: "Not implemented",
       responses: %{
-        200 => Operation.response("Empry array", "application/json", %Schema{type: :array})
+        200 => empty_array_response()
       }
     }
   end
diff --git a/lib/pleroma/web/api_spec/operations/domain_block_operation.ex b/lib/pleroma/web/api_spec/operations/domain_block_operation.ex
index 3b7f51ceb..049bcf931 100644
--- a/lib/pleroma/web/api_spec/operations/domain_block_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/domain_block_operation.ex
@@ -5,7 +5,7 @@
 defmodule Pleroma.Web.ApiSpec.DomainBlockOperation do
   alias OpenApiSpex.Operation
   alias OpenApiSpex.Schema
-  alias Pleroma.Web.ApiSpec.Helpers
+  import Pleroma.Web.ApiSpec.Helpers
 
   def open_api_operation(action) do
     operation = String.to_existing_atom("#{action}_operation")
@@ -46,9 +46,7 @@ defmodule Pleroma.Web.ApiSpec.DomainBlockOperation do
       operationId: "DomainBlockController.create",
       requestBody: domain_block_request(),
       security: [%{"oAuth" => ["follow", "write:blocks"]}],
-      responses: %{
-        200 => Operation.response("Empty object", "application/json", %Schema{type: :object})
-      }
+      responses: %{200 => empty_object_response()}
     }
   end
 
@@ -67,7 +65,7 @@ defmodule Pleroma.Web.ApiSpec.DomainBlockOperation do
   end
 
   defp domain_block_request do
-    Helpers.request_body(
+    request_body(
       "Parameters",
       %Schema{
         type: :object,
diff --git a/lib/pleroma/web/api_spec/operations/notification_operation.ex b/lib/pleroma/web/api_spec/operations/notification_operation.ex
new file mode 100644
index 000000000..64adc5319
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/notification_operation.ex
@@ -0,0 +1,211 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.NotificationOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.Account
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+  alias Pleroma.Web.ApiSpec.Schemas.BooleanLike
+  alias Pleroma.Web.ApiSpec.Schemas.Status
+  alias Pleroma.Web.ApiSpec.Schemas.VisibilityScope
+
+  import Pleroma.Web.ApiSpec.Helpers
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def index_operation do
+    %Operation{
+      tags: ["Notifications"],
+      summary: "Get all notifications",
+      description:
+        "Notifications concerning the user. This API returns Link headers containing links to the next/previous page. However, the links can also be constructed dynamically using query params and `id` values.",
+      operationId: "NotificationController.index",
+      security: [%{"oAuth" => ["read:notifications"]}],
+      parameters:
+        [
+          Operation.parameter(
+            :exclude_types,
+            :query,
+            %Schema{type: :array, items: notification_type()},
+            "Array of types to exclude"
+          ),
+          Operation.parameter(
+            :account_id,
+            :query,
+            %Schema{type: :string},
+            "Return only notifications received from this account"
+          ),
+          Operation.parameter(
+            :exclude_visibilities,
+            :query,
+            %Schema{type: :array, items: VisibilityScope},
+            "Exclude the notifications for activities with the given visibilities"
+          ),
+          Operation.parameter(
+            :include_types,
+            :query,
+            %Schema{type: :array, items: notification_type()},
+            "Include the notifications for activities with the given types"
+          ),
+          Operation.parameter(
+            :with_muted,
+            :query,
+            BooleanLike,
+            "Include the notifications from muted users"
+          )
+        ] ++ pagination_params(),
+      responses: %{
+        200 =>
+          Operation.response("Array of notifications", "application/json", %Schema{
+            type: :array,
+            items: notification()
+          }),
+        404 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def show_operation do
+    %Operation{
+      tags: ["Notifications"],
+      summary: "Get a single notification",
+      description: "View information about a notification with a given ID.",
+      operationId: "NotificationController.show",
+      security: [%{"oAuth" => ["read:notifications"]}],
+      parameters: [id_param()],
+      responses: %{
+        200 => Operation.response("Notification", "application/json", notification())
+      }
+    }
+  end
+
+  def clear_operation do
+    %Operation{
+      tags: ["Notifications"],
+      summary: "Dismiss all notifications",
+      description: "Clear all notifications from the server.",
+      operationId: "NotificationController.clear",
+      security: [%{"oAuth" => ["write:notifications"]}],
+      responses: %{200 => empty_object_response()}
+    }
+  end
+
+  def dismiss_operation do
+    %Operation{
+      tags: ["Notifications"],
+      summary: "Dismiss a single notification",
+      description: "Clear a single notification from the server.",
+      operationId: "NotificationController.dismiss",
+      parameters: [id_param()],
+      security: [%{"oAuth" => ["write:notifications"]}],
+      responses: %{200 => empty_object_response()}
+    }
+  end
+
+  def dismiss_via_body_operation do
+    %Operation{
+      tags: ["Notifications"],
+      summary: "Dismiss a single notification",
+      deprecated: true,
+      description: "Clear a single notification from the server.",
+      operationId: "NotificationController.dismiss_via_body",
+      requestBody:
+        request_body(
+          "Parameters",
+          %Schema{type: :object, properties: %{id: %Schema{type: :string}}},
+          required: true
+        ),
+      security: [%{"oAuth" => ["write:notifications"]}],
+      responses: %{200 => empty_object_response()}
+    }
+  end
+
+  def destroy_multiple_operation do
+    %Operation{
+      tags: ["Notifications"],
+      summary: "Dismiss multiple notifications",
+      operationId: "NotificationController.destroy_multiple",
+      security: [%{"oAuth" => ["write:notifications"]}],
+      parameters: [
+        Operation.parameter(
+          :ids,
+          :query,
+          %Schema{type: :array, items: %Schema{type: :string}},
+          "Array of notification IDs to dismiss",
+          required: true
+        )
+      ],
+      responses: %{200 => empty_object_response()}
+    }
+  end
+
+  defp notification do
+    %Schema{
+      title: "Notification",
+      description: "Response schema for a notification",
+      type: :object,
+      properties: %{
+        id: %Schema{type: :string},
+        type: notification_type(),
+        created_at: %Schema{type: :string, format: :"date-time"},
+        account: %Schema{
+          allOf: [Account],
+          description: "The account that performed the action that generated the notification."
+        },
+        status: %Schema{
+          allOf: [Status],
+          description:
+            "Status that was the object of the notification, e.g. in mentions, reblogs, favourites, or polls.",
+          nullable: true
+        }
+      },
+      example: %{
+        "id" => "34975861",
+        "type" => "mention",
+        "created_at" => "2019-11-23T07:49:02.064Z",
+        "account" => Account.schema().example,
+        "status" => Status.schema().example
+      }
+    }
+  end
+
+  defp notification_type do
+    %Schema{
+      type: :string,
+      enum: [
+        "follow",
+        "favourite",
+        "reblog",
+        "mention",
+        "poll",
+        "pleroma:emoji_reaction",
+        "move",
+        "follow_request"
+      ],
+      description: """
+      The type of event that resulted in the notification.
+
+      - `follow` - Someone followed you
+      - `mention` - Someone mentioned you in their status
+      - `reblog` - Someone boosted one of your statuses
+      - `favourite` - Someone favourited one of your statuses
+      - `poll` - A poll you have voted in or created has ended
+      - `move` - Someone moved their account
+      - `pleroma:emoji_reaction` - Someone reacted with emoji to your status
+      """
+    }
+  end
+
+  defp id_param do
+    Operation.parameter(:id, :path, :string, "Notification ID",
+      example: "123",
+      required: true
+    )
+  end
+end
diff --git a/lib/pleroma/web/api_spec/operations/report_operation.ex b/lib/pleroma/web/api_spec/operations/report_operation.ex
new file mode 100644
index 000000000..da4d50703
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/report_operation.ex
@@ -0,0 +1,78 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.ReportOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Helpers
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def create_operation do
+    %Operation{
+      tags: ["reports"],
+      summary: "File a report",
+      description: "Report problematic users to your moderators",
+      operationId: "ReportController.create",
+      security: [%{"oAuth" => ["follow", "write:reports"]}],
+      requestBody: Helpers.request_body("Parameters", create_request(), required: true),
+      responses: %{
+        200 => Operation.response("Report", "application/json", create_response()),
+        400 => Operation.response("Report", "application/json", ApiError)
+      }
+    }
+  end
+
+  defp create_request do
+    %Schema{
+      title: "ReportCreateRequest",
+      description: "POST body for creating a report",
+      type: :object,
+      properties: %{
+        account_id: %Schema{type: :string, description: "ID of the account to report"},
+        status_ids: %Schema{
+          type: :array,
+          items: %Schema{type: :string},
+          description: "Array of Statuses to attach to the report, for context"
+        },
+        comment: %Schema{
+          type: :string,
+          description: "Reason for the report"
+        },
+        forward: %Schema{
+          type: :boolean,
+          default: false,
+          description:
+            "If the account is remote, should the report be forwarded to the remote admin?"
+        }
+      },
+      required: [:account_id],
+      example: %{
+        "account_id" => "123",
+        "status_ids" => ["1337"],
+        "comment" => "bad status!",
+        "forward" => "false"
+      }
+    }
+  end
+
+  defp create_response do
+    %Schema{
+      title: "ReportResponse",
+      type: :object,
+      properties: %{
+        id: %Schema{type: :string, description: "Report ID"},
+        action_taken: %Schema{type: :boolean, description: "Is action taken?"}
+      },
+      example: %{
+        "id" => "123",
+        "action_taken" => false
+      }
+    }
+  end
+end
diff --git a/lib/pleroma/web/common_api/common_api.ex b/lib/pleroma/web/common_api/common_api.ex
index 359045f48..1eda0b2f2 100644
--- a/lib/pleroma/web/common_api/common_api.ex
+++ b/lib/pleroma/web/common_api/common_api.ex
@@ -8,6 +8,7 @@ defmodule Pleroma.Web.CommonAPI do
   alias Pleroma.Conversation.Participation
   alias Pleroma.FollowingRelationship
   alias Pleroma.Formatter
+  alias Pleroma.Notification
   alias Pleroma.Object
   alias Pleroma.ThreadMute
   alias Pleroma.User
@@ -68,8 +69,8 @@ defmodule Pleroma.Web.CommonAPI do
   end
 
   def accept_follow_request(follower, followed) do
-    with {:ok, follower} <- User.follow(follower, followed),
-         %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
+    with %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
+         {:ok, follower} <- User.follow(follower, followed),
          {:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "accept"),
          {:ok, _relationship} <- FollowingRelationship.update(follower, followed, :follow_accept),
          {:ok, _activity} <-
@@ -87,6 +88,7 @@ defmodule Pleroma.Web.CommonAPI do
     with %Activity{} = follow_activity <- Utils.fetch_latest_follow(follower, followed),
          {:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "reject"),
          {:ok, _relationship} <- FollowingRelationship.update(follower, followed, :follow_reject),
+         {:ok, _notifications} <- Notification.dismiss(follow_activity),
          {:ok, _activity} <-
            ActivityPub.reject(%{
              to: [follower.ap_id],
@@ -406,9 +408,9 @@ defmodule Pleroma.Web.CommonAPI do
     ThreadMute.exists?(user.id, activity.data["context"])
   end
 
-  def report(user, %{"account_id" => account_id} = data) do
-    with {:ok, account} <- get_reported_account(account_id),
-         {:ok, {content_html, _, _}} <- make_report_content_html(data["comment"]),
+  def report(user, data) do
+    with {:ok, account} <- get_reported_account(data.account_id),
+         {:ok, {content_html, _, _}} <- make_report_content_html(data[:comment]),
          {:ok, statuses} <- get_report_statuses(account, data) do
       ActivityPub.flag(%{
         context: Utils.generate_context_id(),
@@ -416,13 +418,11 @@ defmodule Pleroma.Web.CommonAPI do
         account: account,
         statuses: statuses,
         content: content_html,
-        forward: data["forward"] || false
+        forward: Map.get(data, :forward, false)
       })
     end
   end
 
-  def report(_user, _params), do: {:error, dgettext("errors", "Valid `account_id` required")}
-
   defp get_reported_account(account_id) do
     case User.get_cached_by_id(account_id) do
       %User{} = account -> {:ok, account}
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 4afdf80af..b0b1bd559 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -504,7 +504,8 @@ defmodule Pleroma.Web.CommonAPI.Utils do
     end
   end
 
-  def get_report_statuses(%User{ap_id: actor}, %{"status_ids" => status_ids}) do
+  def get_report_statuses(%User{ap_id: actor}, %{status_ids: status_ids})
+      when is_list(status_ids) do
     {:ok, Activity.all_by_actor_and_id(actor, status_ids)}
   end
 
diff --git a/lib/pleroma/web/endpoint.ex b/lib/pleroma/web/endpoint.ex
index 72cb3ee27..226d42c2c 100644
--- a/lib/pleroma/web/endpoint.ex
+++ b/lib/pleroma/web/endpoint.ex
@@ -5,6 +5,8 @@
 defmodule Pleroma.Web.Endpoint do
   use Phoenix.Endpoint, otp_app: :pleroma
 
+  require Pleroma.Constants
+
   socket("/socket", Pleroma.Web.UserSocket)
 
   plug(Pleroma.Plugs.SetLocalePlug)
@@ -34,8 +36,7 @@ defmodule Pleroma.Web.Endpoint do
     Plug.Static,
     at: "/",
     from: :pleroma,
-    only:
-      ~w(index.html robots.txt static finmoji emoji packs sounds images instance sw.js sw-pleroma.js favicon.png schemas doc),
+    only: Pleroma.Constants.static_only_files(),
     # credo:disable-for-previous-line Credo.Check.Readability.MaxLineLength
     gzip: true,
     cache_control_for_etags: @static_cache_control,
diff --git a/lib/pleroma/web/mastodon_api/controllers/account_controller.ex b/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
index 1eedf02d6..61b0e2f63 100644
--- a/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
@@ -94,24 +94,8 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do
 
   @doc "POST /api/v1/accounts"
   def create(%{assigns: %{app: app}, body_params: params} = conn, _params) do
-    params =
-      params
-      |> Map.take([
-        :email,
-        :bio,
-        :captcha_solution,
-        :captcha_token,
-        :captcha_answer_data,
-        :token,
-        :password,
-        :fullname
-      ])
-      |> Map.put(:nickname, params.username)
-      |> Map.put(:fullname, Map.get(params, :fullname, params.username))
-      |> Map.put(:confirm, params.password)
-      |> Map.put(:trusted_app, app.trusted)
-
     with :ok <- validate_email_param(params),
+         :ok <- TwitterAPI.validate_captcha(app, params),
          {:ok, user} <- TwitterAPI.register_user(params, need_confirmation: true),
          {:ok, token} <- Token.create_token(app, user, %{scopes: app.scopes}) do
       json(conn, %{
@@ -121,7 +105,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do
         created_at: Token.Utils.format_created_at(token)
       })
     else
-      {:error, errors} -> json_response(conn, :bad_request, errors)
+      {:error, error} -> json_response(conn, :bad_request, %{error: error})
     end
   end
 
@@ -133,11 +117,11 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do
     render_error(conn, :forbidden, "Invalid credentials")
   end
 
-  defp validate_email_param(%{:email => email}) when not is_nil(email), do: :ok
+  defp validate_email_param(%{email: email}) when not is_nil(email), do: :ok
 
   defp validate_email_param(_) do
     case Pleroma.Config.get([:instance, :account_activation_required]) do
-      true -> {:error, %{"error" => "Missing parameters"}}
+      true -> {:error, dgettext("errors", "Missing parameter: %{name}", name: "email")}
       _ -> :ok
     end
   end
diff --git a/lib/pleroma/web/mastodon_api/controllers/notification_controller.ex b/lib/pleroma/web/mastodon_api/controllers/notification_controller.ex
index 311405277..a14c86893 100644
--- a/lib/pleroma/web/mastodon_api/controllers/notification_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/notification_controller.ex
@@ -13,6 +13,8 @@ defmodule Pleroma.Web.MastodonAPI.NotificationController do
 
   @oauth_read_actions [:show, :index]
 
+  plug(OpenApiSpex.Plug.CastAndValidate, render_error: Pleroma.Web.ApiSpec.RenderError)
+
   plug(
     OAuthScopesPlug,
     %{scopes: ["read:notifications"]} when action in @oauth_read_actions
@@ -20,14 +22,16 @@ defmodule Pleroma.Web.MastodonAPI.NotificationController do
 
   plug(OAuthScopesPlug, %{scopes: ["write:notifications"]} when action not in @oauth_read_actions)
 
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.NotificationOperation
+
   # GET /api/v1/notifications
-  def index(conn, %{"account_id" => account_id} = params) do
+  def index(conn, %{account_id: account_id} = params) do
     case Pleroma.User.get_cached_by_id(account_id) do
       %{ap_id: account_ap_id} ->
         params =
           params
-          |> Map.delete("account_id")
-          |> Map.put("account_ap_id", account_ap_id)
+          |> Map.delete(:account_id)
+          |> Map.put(:account_ap_id, account_ap_id)
 
         index(conn, params)
 
@@ -39,6 +43,7 @@ defmodule Pleroma.Web.MastodonAPI.NotificationController do
   end
 
   def index(%{assigns: %{user: user}} = conn, params) do
+    params = Map.new(params, fn {k, v} -> {to_string(k), v} end)
     notifications = MastodonAPI.get_notifications(user, params)
 
     conn
@@ -51,7 +56,7 @@ defmodule Pleroma.Web.MastodonAPI.NotificationController do
   end
 
   # GET /api/v1/notifications/:id
-  def show(%{assigns: %{user: user}} = conn, %{"id" => id}) do
+  def show(%{assigns: %{user: user}} = conn, %{id: id}) do
     with {:ok, notification} <- Notification.get(user, id) do
       render(conn, "show.json", notification: notification, for: user)
     else
@@ -69,8 +74,8 @@ defmodule Pleroma.Web.MastodonAPI.NotificationController do
   end
 
   # POST /api/v1/notifications/:id/dismiss
-  # POST /api/v1/notifications/dismiss (deprecated)
-  def dismiss(%{assigns: %{user: user}} = conn, %{"id" => id} = _params) do
+
+  def dismiss(%{assigns: %{user: user}} = conn, %{id: id} = _params) do
     with {:ok, _notif} <- Notification.dismiss(user, id) do
       json(conn, %{})
     else
@@ -81,8 +86,13 @@ defmodule Pleroma.Web.MastodonAPI.NotificationController do
     end
   end
 
+  # POST /api/v1/notifications/dismiss (deprecated)
+  def dismiss_via_body(%{body_params: params} = conn, _) do
+    dismiss(conn, params)
+  end
+
   # DELETE /api/v1/notifications/destroy_multiple
-  def destroy_multiple(%{assigns: %{user: user}} = conn, %{"ids" => ids} = _params) do
+  def destroy_multiple(%{assigns: %{user: user}} = conn, %{ids: ids} = _params) do
     Notification.destroy_multiple(user, ids)
     json(conn, %{})
   end
diff --git a/lib/pleroma/web/mastodon_api/controllers/report_controller.ex b/lib/pleroma/web/mastodon_api/controllers/report_controller.ex
index 9fbaa7bd1..f65c5c62b 100644
--- a/lib/pleroma/web/mastodon_api/controllers/report_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/report_controller.ex
@@ -9,10 +9,13 @@ defmodule Pleroma.Web.MastodonAPI.ReportController do
 
   action_fallback(Pleroma.Web.MastodonAPI.FallbackController)
 
+  plug(OpenApiSpex.Plug.CastAndValidate, render_error: Pleroma.Web.ApiSpec.RenderError)
   plug(OAuthScopesPlug, %{scopes: ["write:reports"]} when action == :create)
 
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.ReportOperation
+
   @doc "POST /api/v1/reports"
-  def create(%{assigns: %{user: user}} = conn, params) do
+  def create(%{assigns: %{user: user}, body_params: params} = conn, _) do
     with {:ok, activity} <- Pleroma.Web.CommonAPI.report(user, params) do
       render(conn, "show.json", activity: activity)
     end
diff --git a/lib/pleroma/web/mastodon_api/views/instance_view.ex b/lib/pleroma/web/mastodon_api/views/instance_view.ex
index 67214dbea..a329ffc28 100644
--- a/lib/pleroma/web/mastodon_api/views/instance_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/instance_view.ex
@@ -5,10 +5,13 @@
 defmodule Pleroma.Web.MastodonAPI.InstanceView do
   use Pleroma.Web, :view
 
+  alias Pleroma.Config
+  alias Pleroma.Web.ActivityPub.MRF
+
   @mastodon_api_level "2.7.2"
 
   def render("show.json", _) do
-    instance = Pleroma.Config.get(:instance)
+    instance = Config.get(:instance)
 
     %{
       uri: Pleroma.Web.base_url(),
@@ -29,7 +32,58 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do
       upload_limit: Keyword.get(instance, :upload_limit),
       avatar_upload_limit: Keyword.get(instance, :avatar_upload_limit),
       background_upload_limit: Keyword.get(instance, :background_upload_limit),
-      banner_upload_limit: Keyword.get(instance, :banner_upload_limit)
+      banner_upload_limit: Keyword.get(instance, :banner_upload_limit),
+      pleroma: %{
+        metadata: %{
+          features: features(),
+          federation: federation()
+        },
+        vapid_public_key: Keyword.get(Pleroma.Web.Push.vapid_config(), :public_key)
+      }
     }
   end
+
+  def features do
+    [
+      "pleroma_api",
+      "mastodon_api",
+      "mastodon_api_streaming",
+      "polls",
+      "pleroma_explicit_addressing",
+      "shareable_emoji_packs",
+      "multifetch",
+      "pleroma:api/v1/notifications:include_types_filter",
+      if Config.get([:media_proxy, :enabled]) do
+        "media_proxy"
+      end,
+      if Config.get([:gopher, :enabled]) do
+        "gopher"
+      end,
+      if Config.get([:chat, :enabled]) do
+        "chat"
+      end,
+      if Config.get([:instance, :allow_relay]) do
+        "relay"
+      end,
+      if Config.get([:instance, :safe_dm_mentions]) do
+        "safe_dm_mentions"
+      end,
+      "pleroma_emoji_reactions"
+    ]
+    |> Enum.filter(& &1)
+  end
+
+  def federation do
+    quarantined = Config.get([:instance, :quarantined_instances], [])
+
+    if Config.get([:instance, :mrf_transparency]) do
+      {:ok, data} = MRF.describe()
+
+      data
+      |> Map.merge(%{quarantined_instances: quarantined})
+    else
+      %{}
+    end
+    |> Map.put(:enabled, Config.get([:instance, :federating]))
+  end
 end
diff --git a/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex b/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
index f9a5ddcc0..721b599d4 100644
--- a/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
+++ b/lib/pleroma/web/nodeinfo/nodeinfo_controller.ex
@@ -9,8 +9,8 @@ defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
   alias Pleroma.Stats
   alias Pleroma.User
   alias Pleroma.Web
-  alias Pleroma.Web.ActivityPub.MRF
   alias Pleroma.Web.Federator.Publisher
+  alias Pleroma.Web.MastodonAPI.InstanceView
 
   def schemas(conn, _params) do
     response = %{
@@ -34,51 +34,12 @@ defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
   def raw_nodeinfo do
     stats = Stats.get_stats()
 
-    quarantined = Config.get([:instance, :quarantined_instances], [])
-
     staff_accounts =
       User.all_superusers()
       |> Enum.map(fn u -> u.ap_id end)
 
-    federation_response =
-      if Config.get([:instance, :mrf_transparency]) do
-        {:ok, data} = MRF.describe()
-
-        data
-        |> Map.merge(%{quarantined_instances: quarantined})
-      else
-        %{}
-      end
-      |> Map.put(:enabled, Config.get([:instance, :federating]))
-
-    features =
-      [
-        "pleroma_api",
-        "mastodon_api",
-        "mastodon_api_streaming",
-        "polls",
-        "pleroma_explicit_addressing",
-        "shareable_emoji_packs",
-        "multifetch",
-        "pleroma:api/v1/notifications:include_types_filter",
-        if Config.get([:media_proxy, :enabled]) do
-          "media_proxy"
-        end,
-        if Config.get([:gopher, :enabled]) do
-          "gopher"
-        end,
-        if Config.get([:chat, :enabled]) do
-          "chat"
-        end,
-        if Config.get([:instance, :allow_relay]) do
-          "relay"
-        end,
-        if Config.get([:instance, :safe_dm_mentions]) do
-          "safe_dm_mentions"
-        end,
-        "pleroma_emoji_reactions"
-      ]
-      |> Enum.filter(& &1)
+    features = InstanceView.features()
+    federation = InstanceView.federation()
 
     %{
       version: "2.0",
@@ -106,7 +67,7 @@ defmodule Pleroma.Web.Nodeinfo.NodeinfoController do
           enabled: false
         },
         staffAccounts: staff_accounts,
-        federation: federation_response,
+        federation: federation,
         pollLimits: Config.get([:instance, :poll_limits]),
         postFormats: Config.get([:instance, :allowed_post_formats]),
         uploadLimits: %{
diff --git a/lib/pleroma/web/pleroma_api/controllers/emoji_api_controller.ex b/lib/pleroma/web/pleroma_api/controllers/emoji_api_controller.ex
index e01825b48..d276b96a4 100644
--- a/lib/pleroma/web/pleroma_api/controllers/emoji_api_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/emoji_api_controller.ex
@@ -1,195 +1,93 @@
 defmodule Pleroma.Web.PleromaAPI.EmojiAPIController do
   use Pleroma.Web, :controller
 
-  alias Pleroma.Plugs.ExpectPublicOrAuthenticatedCheckPlug
-  alias Pleroma.Plugs.OAuthScopesPlug
-
-  require Logger
+  alias Pleroma.Emoji.Pack
 
   plug(
-    OAuthScopesPlug,
+    Pleroma.Plugs.OAuthScopesPlug,
     %{scopes: ["write"], admin: true}
     when action in [
+           :import_from_filesystem,
+           :remote,
+           :download,
            :create,
+           :update,
            :delete,
-           :save_from,
-           :import_from_fs,
+           :add_file,
            :update_file,
-           :update_metadata
+           :delete_file
          ]
   )
 
   plug(
     :skip_plug,
-    [OAuthScopesPlug, ExpectPublicOrAuthenticatedCheckPlug]
-    when action in [:download_shared, :list_packs, :list_from]
+    [Pleroma.Plugs.OAuthScopesPlug, Pleroma.Plugs.ExpectPublicOrAuthenticatedCheckPlug]
+    when action in [:archive, :show, :list]
   )
 
-  defp emoji_dir_path do
-    Path.join(
-      Pleroma.Config.get!([:instance, :static_dir]),
-      "emoji"
-    )
-  end
-
-  @doc """
-  Lists packs from the remote instance.
-
-  Since JS cannot ask remote instances for their packs due to CPS, it has to
-  be done by the server
-  """
-  def list_from(conn, %{"instance_address" => address}) do
-    address = String.trim(address)
-
-    if shareable_packs_available(address) do
-      list_resp =
-        "#{address}/api/pleroma/emoji/packs" |> Tesla.get!() |> Map.get(:body) |> Jason.decode!()
-
-      json(conn, list_resp)
+  def remote(conn, %{"url" => url}) do
+    with {:ok, packs} <- Pack.list_remote(url) do
+      json(conn, packs)
     else
-      conn
-      |> put_status(:internal_server_error)
-      |> json(%{error: "The requested instance does not support sharing emoji packs"})
+      {:shareable, _} ->
+        conn
+        |> put_status(:internal_server_error)
+        |> json(%{error: "The requested instance does not support sharing emoji packs"})
     end
   end
 
-  @doc """
-  Lists the packs available on the instance as JSON.
-
-  The information is public and does not require authentication. The format is
-  a map of "pack directory name" to pack.json contents.
-  """
-  def list_packs(conn, _params) do
-    # 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_dir_path())},
-         {:ls, {:ok, results}} <- {:ls, File.ls(emoji_dir_path())} do
-      pack_infos =
-        results
-        |> Enum.filter(&has_pack_json?/1)
-        |> Enum.map(&load_pack/1)
-        # Check if all the files are in place and can be sent
-        |> Enum.map(&validate_pack/1)
-        # Transform into a map of pack-name => pack-data
-        |> Enum.into(%{})
-
-      json(conn, pack_infos)
+  def list(conn, _params) do
+    emoji_path =
+      Path.join(
+        Pleroma.Config.get!([:instance, :static_dir]),
+        "emoji"
+      )
+
+    with {:ok, packs} <- Pack.list_local() do
+      json(conn, packs)
     else
       {:create_dir, {:error, e}} ->
         conn
         |> put_status(:internal_server_error)
-        |> json(%{error: "Failed to create the emoji pack directory at #{emoji_dir_path()}: #{e}"})
+        |> json(%{error: "Failed to create the emoji pack directory at #{emoji_path}: #{e}"})
 
       {:ls, {:error, e}} ->
         conn
         |> put_status(:internal_server_error)
         |> json(%{
-          error:
-            "Failed to get the contents of the emoji pack directory at #{emoji_dir_path()}: #{e}"
+          error: "Failed to get the contents of the emoji pack directory at #{emoji_path}: #{e}"
         })
     end
   end
 
-  defp has_pack_json?(file) do
-    dir_path = Path.join(emoji_dir_path(), file)
-    # Filter to only use the pack.json packs
-    File.dir?(dir_path) and File.exists?(Path.join(dir_path, "pack.json"))
-  end
-
-  defp load_pack(pack_name) do
-    pack_path = Path.join(emoji_dir_path(), pack_name)
-    pack_file = Path.join(pack_path, "pack.json")
-
-    {pack_name, Jason.decode!(File.read!(pack_file))}
-  end
-
-  defp validate_pack({name, pack}) do
-    pack_path = Path.join(emoji_dir_path(), name)
-
-    if can_download?(pack, pack_path) do
-      archive_for_sha = make_archive(name, pack, pack_path)
-      archive_sha = :crypto.hash(:sha256, archive_for_sha) |> Base.encode16()
+  def show(conn, %{"name" => name}) do
+    name = String.trim(name)
 
-      pack =
-        pack
-        |> put_in(["pack", "can-download"], true)
-        |> put_in(["pack", "download-sha256"], archive_sha)
-
-      {name, pack}
+    with {:ok, pack} <- Pack.show(name) do
+      json(conn, pack)
     else
-      {name, put_in(pack, ["pack", "can-download"], false)}
-    end
-  end
-
-  defp can_download?(pack, pack_path) 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 {_, path} ->
-        File.exists?(Path.join(pack_path, path))
-      end)
-  end
-
-  defp create_archive_and_cache(name, pack, pack_dir, md5) do
-    files =
-      ['pack.json'] ++
-        (pack["files"] |> Enum.map(fn {_, path} -> to_charlist(path) end))
-
-    {:ok, {_, zip_result}} = :zip.zip('#{name}.zip', files, [:memory, cwd: to_charlist(pack_dir)])
-
-    cache_seconds_per_file = Pleroma.Config.get!([:emoji, :shared_pack_cache_seconds_per_file])
-    cache_ms = :timer.seconds(cache_seconds_per_file * Enum.count(files))
-
-    Cachex.put!(
-      :emoji_packs_cache,
-      name,
-      # if pack.json MD5 changes, the cache is not valid anymore
-      %{pack_json_md5: md5, pack_data: zip_result},
-      # Add a minute to cache time for every file in the pack
-      ttl: cache_ms
-    )
-
-    Logger.debug("Created an archive for the '#{name}' emoji pack, \
-keeping it in cache for #{div(cache_ms, 1000)}s")
-
-    zip_result
-  end
-
-  defp make_archive(name, pack, pack_dir) do
-    # Having a different pack.json md5 invalidates cache
-    pack_file_md5 = :crypto.hash(:md5, File.read!(Path.join(pack_dir, "pack.json")))
-
-    case Cachex.get!(:emoji_packs_cache, name) do
-      %{pack_file_md5: ^pack_file_md5, pack_data: zip_result} ->
-        Logger.debug("Using cache for the '#{name}' shared emoji pack")
-        zip_result
+      {:loaded, _} ->
+        conn
+        |> put_status(:not_found)
+        |> json(%{error: "Pack #{name} does not exist"})
 
-      _ ->
-        create_archive_and_cache(name, pack, pack_dir, pack_file_md5)
+      {:error, :empty_values} ->
+        conn
+        |> put_status(:bad_request)
+        |> json(%{error: "pack name cannot be empty"})
     end
   end
 
-  @doc """
-  An endpoint for other instances (via admin UI) or users (via browser)
-  to download packs that the instance shares.
-  """
-  def download_shared(conn, %{"name" => name}) do
-    pack_dir = Path.join(emoji_dir_path(), name)
-    pack_file = Path.join(pack_dir, "pack.json")
-
-    with {_, true} <- {:exists?, File.exists?(pack_file)},
-         pack = Jason.decode!(File.read!(pack_file)),
-         {_, true} <- {:can_download?, can_download?(pack, pack_dir)} do
-      zip_result = make_archive(name, pack, pack_dir)
-      send_download(conn, {:binary, zip_result}, filename: "#{name}.zip")
+  def archive(conn, %{"name" => name}) do
+    with {:ok, archive} <- Pack.get_archive(name) do
+      send_download(conn, {:binary, archive}, filename: "#{name}.zip")
     else
       {:can_download?, _} ->
         conn
         |> put_status(:forbidden)
         |> json(%{
-          error: "Pack #{name} cannot be downloaded from this instance, either pack sharing\
-           was disabled for this pack or some files are missing"
+          error:
+            "Pack #{name} cannot be downloaded from this instance, either pack sharing was disabled for this pack or some files are missing"
         })
 
       {:exists?, _} ->
@@ -199,133 +97,67 @@ keeping it in cache for #{div(cache_ms, 1000)}s")
     end
   end
 
-  defp shareable_packs_available(address) do
-    "#{address}/.well-known/nodeinfo"
-    |> 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
-
-  @doc """
-  An admin endpoint to request downloading and storing a pack named `pack_name` from the instance
-  `instance_address`.
-
-  If the requested instance's admin chose to share the pack, it will be downloaded
-  from that instance, otherwise it will be downloaded from the fallback source, if there is one.
-  """
-  def save_from(conn, %{"instance_address" => address, "pack_name" => name} = data) do
-    address = String.trim(address)
-
-    if shareable_packs_available(address) do
-      full_pack =
-        "#{address}/api/pleroma/emoji/packs/list"
-        |> Tesla.get!()
-        |> Map.get(:body)
-        |> Jason.decode!()
-        |> Map.get(name)
-
-      pack_info_res =
-        case full_pack["pack"] do
-          %{"share-files" => true, "can-download" => true, "download-sha256" => sha} ->
-            {:ok,
-             %{
-               sha: sha,
-               uri: "#{address}/api/pleroma/emoji/packs/download_shared/#{name}"
-             }}
-
-          %{"fallback-src" => src, "fallback-src-sha256" => sha} when is_binary(src) ->
-            {:ok,
-             %{
-               sha: sha,
-               uri: 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, uri: uri} = pinfo} <- pack_info_res,
-           %{body: emoji_archive} <- Tesla.get!(uri),
-           {_, true} <- {:checksum, Base.decode16!(sha) == :crypto.hash(:sha256, emoji_archive)} do
-        local_name = data["as"] || name
-        pack_dir = Path.join(emoji_dir_path(), local_name)
-        File.mkdir_p!(pack_dir)
-
-        files = Enum.map(full_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(emoji_archive, cwd: to_charlist(pack_dir), 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
-          pack_file_path = Path.join(pack_dir, "pack.json")
-
-          File.write!(pack_file_path, Jason.encode!(full_pack, pretty: true))
-        end
-
-        json(conn, "ok")
-      else
-        {:error, e} ->
-          conn |> put_status(:internal_server_error) |> json(%{error: e})
-
-        {:checksum, _} ->
-          conn
-          |> put_status(:internal_server_error)
-          |> json(%{error: "SHA256 for the pack doesn't match the one sent by the server"})
-      end
+  def download(conn, %{"url" => url, "name" => name} = params) do
+    with :ok <- Pack.download(name, url, params["as"]) do
+      json(conn, "ok")
     else
-      conn
-      |> put_status(:internal_server_error)
-      |> json(%{error: "The requested instance does not support sharing emoji packs"})
+      {:shareable, _} ->
+        conn
+        |> put_status(:internal_server_error)
+        |> json(%{error: "The requested instance does not support sharing emoji packs"})
+
+      {:checksum, _} ->
+        conn
+        |> put_status(:internal_server_error)
+        |> json(%{error: "SHA256 for the pack doesn't match the one sent by the server"})
+
+      {:error, e} ->
+        conn
+        |> put_status(:internal_server_error)
+        |> json(%{error: e})
     end
   end
 
-  @doc """
-  Creates an empty pack named `name` which then can be updated via the admin UI.
-  """
   def create(conn, %{"name" => name}) do
-    pack_dir = Path.join(emoji_dir_path(), name)
+    name = String.trim(name)
 
-    if not File.exists?(pack_dir) do
-      File.mkdir_p!(pack_dir)
-
-      pack_file_p = Path.join(pack_dir, "pack.json")
+    with :ok <- Pack.create(name) do
+      json(conn, "ok")
+    else
+      {:error, :eexist} ->
+        conn
+        |> put_status(:conflict)
+        |> json(%{error: "A pack named \"#{name}\" already exists"})
 
-      File.write!(
-        pack_file_p,
-        Jason.encode!(%{pack: %{}, files: %{}}, pretty: true)
-      )
+      {:error, :empty_values} ->
+        conn
+        |> put_status(:bad_request)
+        |> json(%{error: "pack name cannot be empty"})
 
-      conn |> json("ok")
-    else
-      conn
-      |> put_status(:conflict)
-      |> json(%{error: "A pack named \"#{name}\" already exists"})
+      {:error, _} ->
+        render_error(
+          conn,
+          :internal_server_error,
+          "Unexpected error occurred while creating pack."
+        )
     end
   end
 
-  @doc """
-  Deletes the pack `name` and all it's files.
-  """
   def delete(conn, %{"name" => name}) do
-    pack_dir = Path.join(emoji_dir_path(), name)
+    name = String.trim(name)
 
-    case File.rm_rf(pack_dir) do
-      {:ok, _} ->
-        conn |> json("ok")
+    with {:ok, deleted} when deleted != [] <- Pack.delete(name) do
+      json(conn, "ok")
+    else
+      {:ok, []} ->
+        conn
+        |> put_status(:not_found)
+        |> json(%{error: "Pack #{name} does not exist"})
+
+      {:error, :empty_values} ->
+        conn
+        |> put_status(:bad_request)
+        |> json(%{error: "pack name cannot be empty"})
 
       {:error, _, _} ->
         conn
@@ -334,265 +166,128 @@ keeping it in cache for #{div(cache_ms, 1000)}s")
     end
   end
 
-  @doc """
-  An endpoint to update `pack_names`'s metadata.
-
-  `new_data` is the new metadata for the pack, that will replace the old metadata.
-  """
-  def update_metadata(conn, %{"pack_name" => name, "new_data" => new_data}) do
-    pack_file_p = Path.join([emoji_dir_path(), name, "pack.json"])
-
-    full_pack = Jason.decode!(File.read!(pack_file_p))
-
-    # The new fallback-src is in the new data and it's not the same as it was in the old data
-    should_update_fb_sha =
-      not is_nil(new_data["fallback-src"]) and
-        new_data["fallback-src"] != full_pack["pack"]["fallback-src"]
-
-    with {_, true} <- {:should_update?, should_update_fb_sha},
-         %{body: pack_arch} <- Tesla.get!(new_data["fallback-src"]),
-         {:ok, flist} <- :zip.unzip(pack_arch, [:memory]),
-         {_, true} <- {:has_all_files?, has_all_files?(full_pack, flist)} do
-      fallback_sha = :crypto.hash(:sha256, pack_arch) |> Base.encode16()
-
-      new_data = Map.put(new_data, "fallback-src-sha256", fallback_sha)
-      update_metadata_and_send(conn, full_pack, new_data, pack_file_p)
+  def update(conn, %{"name" => name, "metadata" => metadata}) do
+    with {:ok, pack} <- Pack.update_metadata(name, metadata) do
+      json(conn, pack.pack)
     else
-      {:should_update?, _} ->
-        update_metadata_and_send(conn, full_pack, new_data, pack_file_p)
-
       {:has_all_files?, _} ->
         conn
         |> put_status(:bad_request)
         |> json(%{error: "The fallback archive does not have all files specified in pack.json"})
-    end
-  end
-
-  # Check if all files from the pack.json are in the archive
-  defp has_all_files?(%{"files" => files}, flist) do
-    Enum.all?(files, fn {_, from_manifest} ->
-      Enum.find(flist, fn {from_archive, _} ->
-        to_string(from_archive) == from_manifest
-      end)
-    end)
-  end
-
-  defp update_metadata_and_send(conn, full_pack, new_data, pack_file_p) do
-    full_pack = Map.put(full_pack, "pack", new_data)
-    File.write!(pack_file_p, Jason.encode!(full_pack, pretty: true))
 
-    # Send new data back with fallback sha filled
-    json(conn, new_data)
-  end
-
-  defp get_filename(%{"filename" => filename}), do: filename
-
-  defp get_filename(%{"file" => file}) do
-    case file do
-      %Plug.Upload{filename: filename} -> filename
-      url when is_binary(url) -> Path.basename(url)
+      {:error, _} ->
+        render_error(
+          conn,
+          :internal_server_error,
+          "Unexpected error occurred while updating pack metadata."
+        )
     end
   end
 
-  defp empty?(str), do: String.trim(str) == ""
-
-  defp update_file_and_send(conn, updated_full_pack, pack_file_p) do
-    # Write the emoji pack file
-    File.write!(pack_file_p, Jason.encode!(updated_full_pack, pretty: true))
-
-    # Return the modified file list
-    json(conn, updated_full_pack["files"])
-  end
+  def add_file(conn, %{"name" => name} = params) do
+    filename = params["filename"] || get_filename(params["file"])
+    shortcode = params["shortcode"] || Path.basename(filename, Path.extname(filename))
 
-  @doc """
-  Updates a file in a pack.
-
-  Updating can mean three things:
-
-  - `add` adds an emoji named `shortcode` to the pack `pack_name`,
-    that means that the emoji file needs to be uploaded with the request
-    (thus requiring it to be a multipart request) and be named `file`.
-    There can also be an optional `filename` that will be the new emoji file name
-    (if it's not there, the name will be taken from the uploaded file).
-  - `update` changes emoji shortcode (from `shortcode` to `new_shortcode` or moves the file
-    (from the current filename to `new_filename`)
-  - `remove` removes the emoji named `shortcode` and it's associated file
-  """
-
-  # Add
-  def update_file(
-        conn,
-        %{"pack_name" => pack_name, "action" => "add", "shortcode" => shortcode} = params
-      ) do
-    pack_dir = Path.join(emoji_dir_path(), pack_name)
-    pack_file_p = Path.join(pack_dir, "pack.json")
-
-    full_pack = Jason.decode!(File.read!(pack_file_p))
-
-    with {_, false} <- {:has_shortcode, Map.has_key?(full_pack["files"], shortcode)},
-         filename <- get_filename(params),
-         false <- empty?(shortcode),
-         false <- empty?(filename) do
-      file_path = Path.join(pack_dir, filename)
-
-      # If the name contains directories, create them
-      if String.contains?(file_path, "/") do
-        File.mkdir_p!(Path.dirname(file_path))
-      end
-
-      case params["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
-
-      updated_full_pack = put_in(full_pack, ["files", shortcode], filename)
-      update_file_and_send(conn, updated_full_pack, pack_file_p)
+    with {:ok, pack} <- Pack.add_file(name, shortcode, filename, params["file"]) do
+      json(conn, pack.files)
     else
-      {:has_shortcode, _} ->
+      {:exists, _} ->
         conn
         |> put_status(:conflict)
         |> json(%{error: "An emoji with the \"#{shortcode}\" shortcode already exists"})
 
-      true ->
+      {:loaded, _} ->
         conn
         |> put_status(:bad_request)
-        |> json(%{error: "shortcode or filename cannot be empty"})
-    end
-  end
+        |> json(%{error: "pack \"#{name}\" is not found"})
 
-  # Remove
-  def update_file(conn, %{
-        "pack_name" => pack_name,
-        "action" => "remove",
-        "shortcode" => shortcode
-      }) do
-    pack_dir = Path.join(emoji_dir_path(), pack_name)
-    pack_file_p = Path.join(pack_dir, "pack.json")
+      {:error, :empty_values} ->
+        conn
+        |> put_status(:bad_request)
+        |> json(%{error: "pack name, shortcode or filename cannot be empty"})
 
-    full_pack = Jason.decode!(File.read!(pack_file_p))
+      {:error, _} ->
+        render_error(
+          conn,
+          :internal_server_error,
+          "Unexpected error occurred while adding file to pack."
+        )
+    end
+  end
 
-    if Map.has_key?(full_pack["files"], shortcode) do
-      {emoji_file_path, updated_full_pack} = pop_in(full_pack, ["files", shortcode])
+  def update_file(conn, %{"name" => name, "shortcode" => shortcode} = params) do
+    new_shortcode = params["new_shortcode"]
+    new_filename = params["new_filename"]
+    force = params["force"] == true
 
-      emoji_file_path = Path.join(pack_dir, emoji_file_path)
+    with {:ok, pack} <- Pack.update_file(name, shortcode, new_shortcode, new_filename, force) do
+      json(conn, pack.files)
+    else
+      {:exists, _} ->
+        conn
+        |> put_status(:bad_request)
+        |> json(%{error: "Emoji \"#{shortcode}\" does not exist"})
 
-      # Delete the emoji file
-      File.rm!(emoji_file_path)
+      {:not_used, _} ->
+        conn
+        |> put_status(:conflict)
+        |> json(%{
+          error:
+            "New shortcode \"#{new_shortcode}\" is already used. If you want to override emoji use 'force' option"
+        })
 
-      # If the old directory has no more files, remove it
-      if String.contains?(emoji_file_path, "/") do
-        dir = Path.dirname(emoji_file_path)
+      {:loaded, _} ->
+        conn
+        |> put_status(:bad_request)
+        |> json(%{error: "pack \"#{name}\" is not found"})
 
-        if Enum.empty?(File.ls!(dir)) do
-          File.rmdir!(dir)
-        end
-      end
+      {:error, :empty_values} ->
+        conn
+        |> put_status(:bad_request)
+        |> json(%{error: "new_shortcode or new_filename cannot be empty"})
 
-      update_file_and_send(conn, updated_full_pack, pack_file_p)
-    else
-      conn
-      |> put_status(:bad_request)
-      |> json(%{error: "Emoji \"#{shortcode}\" does not exist"})
+      {:error, _} ->
+        render_error(
+          conn,
+          :internal_server_error,
+          "Unexpected error occurred while updating file in pack."
+        )
     end
   end
 
-  # Update
-  def update_file(
-        conn,
-        %{"pack_name" => pack_name, "action" => "update", "shortcode" => shortcode} = params
-      ) do
-    pack_dir = Path.join(emoji_dir_path(), pack_name)
-    pack_file_p = Path.join(pack_dir, "pack.json")
-
-    full_pack = Jason.decode!(File.read!(pack_file_p))
-
-    with {_, true} <- {:has_shortcode, Map.has_key?(full_pack["files"], shortcode)},
-         %{"new_shortcode" => new_shortcode, "new_filename" => new_filename} <- params,
-         false <- empty?(new_shortcode),
-         false <- empty?(new_filename) do
-      # First, remove the old shortcode, saving the old path
-      {old_emoji_file_path, updated_full_pack} = pop_in(full_pack, ["files", shortcode])
-      old_emoji_file_path = Path.join(pack_dir, old_emoji_file_path)
-      new_emoji_file_path = Path.join(pack_dir, new_filename)
-
-      # If the name contains directories, create them
-      if String.contains?(new_emoji_file_path, "/") do
-        File.mkdir_p!(Path.dirname(new_emoji_file_path))
-      end
-
-      # Move/Rename the old filename to a new filename
-      # These are probably on the same filesystem, so just rename should work
-      :ok = File.rename(old_emoji_file_path, new_emoji_file_path)
-
-      # If the old directory has no more files, remove it
-      if String.contains?(old_emoji_file_path, "/") do
-        dir = Path.dirname(old_emoji_file_path)
-
-        if Enum.empty?(File.ls!(dir)) do
-          File.rmdir!(dir)
-        end
-      end
-
-      # Then, put in the new shortcode with the new path
-      updated_full_pack = put_in(updated_full_pack, ["files", new_shortcode], new_filename)
-      update_file_and_send(conn, updated_full_pack, pack_file_p)
+  def delete_file(conn, %{"name" => name, "shortcode" => shortcode}) do
+    with {:ok, pack} <- Pack.delete_file(name, shortcode) do
+      json(conn, pack.files)
     else
-      {:has_shortcode, _} ->
+      {:exists, _} ->
         conn
         |> put_status(:bad_request)
         |> json(%{error: "Emoji \"#{shortcode}\" does not exist"})
 
-      true ->
+      {:loaded, _} ->
         conn
         |> put_status(:bad_request)
-        |> json(%{error: "new_shortcode or new_filename cannot be empty"})
+        |> json(%{error: "pack \"#{name}\" is not found"})
 
-      _ ->
+      {:error, :empty_values} ->
         conn
         |> put_status(:bad_request)
-        |> json(%{error: "new_shortcode or new_file were not specified"})
-    end
-  end
+        |> json(%{error: "pack name or shortcode cannot be empty"})
 
-  def update_file(conn, %{"action" => action}) do
-    conn
-    |> put_status(:bad_request)
-    |> json(%{error: "Unknown action: #{action}"})
+      {:error, _} ->
+        render_error(
+          conn,
+          :internal_server_error,
+          "Unexpected error occurred while removing file from pack."
+        )
+    end
   end
 
-  @doc """
-  Imports emoji from the filesystem.
-
-  Importing means checking all the directories in the
-  `$instance_static/emoji/` for directories which do not have
-  `pack.json`. If one has an emoji.txt file, that file will be used
-  to create a `pack.json` file with it's contents. If the directory has
-  neither, all the files with specific configured extenstions will be
-  assumed to be emojis and stored in the new `pack.json` file.
-  """
-  def import_from_fs(conn, _params) do
-    emoji_path = emoji_dir_path()
-
-    with {:ok, %{access: :read_write}} <- File.stat(emoji_path),
-         {:ok, results} <- File.ls(emoji_path) do
-      imported_pack_names =
-        results
-        |> Enum.filter(fn file ->
-          dir_path = Path.join(emoji_path, file)
-          # Find the directories that do NOT have pack.json
-          File.dir?(dir_path) and not File.exists?(Path.join(dir_path, "pack.json"))
-        end)
-        |> Enum.map(&write_pack_json_contents/1)
-
-      json(conn, imported_pack_names)
+  def import_from_filesystem(conn, _params) do
+    with {:ok, names} <- Pack.import_from_filesystem() do
+      json(conn, names)
     else
-      {:ok, %{access: _}} ->
+      {:error, :no_read_write} ->
         conn
         |> put_status(:internal_server_error)
         |> json(%{error: "Error: emoji pack directory must be writable"})
@@ -604,44 +299,6 @@ keeping it in cache for #{div(cache_ms, 1000)}s")
     end
   end
 
-  defp write_pack_json_contents(dir) do
-    dir_path = Path.join(emoji_dir_path(), dir)
-    emoji_txt_path = Path.join(dir_path, "emoji.txt")
-
-    files_for_pack = files_for_pack(emoji_txt_path, dir_path)
-    pack_json_contents = Jason.encode!(%{pack: %{}, files: files_for_pack})
-
-    File.write!(Path.join(dir_path, "pack.json"), pack_json_contents)
-
-    dir
-  end
-
-  defp files_for_pack(emoji_txt_path, dir_path) do
-    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
-      pack_extensions = Pleroma.Config.get!([:emoji, :pack_extensions])
-      Pleroma.Emoji.Loader.make_shortcode_to_file_map(dir_path, pack_extensions)
-    end
-  end
+  defp get_filename(%Plug.Upload{filename: filename}), do: filename
+  defp get_filename(url) when is_binary(url), do: Path.basename(url)
 end
diff --git a/lib/pleroma/web/pleroma_api/controllers/pleroma_api_controller.ex b/lib/pleroma/web/pleroma_api/controllers/pleroma_api_controller.ex
index 2c1874051..1bdb3aa4d 100644
--- a/lib/pleroma/web/pleroma_api/controllers/pleroma_api_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/pleroma_api_controller.ex
@@ -61,7 +61,10 @@ defmodule Pleroma.Web.PleromaAPI.PleromaAPIController do
           else
             users =
               Enum.map(user_ap_ids, &User.get_cached_by_ap_id/1)
-              |> Enum.filter(& &1)
+              |> Enum.filter(fn
+                %{deactivated: false} -> true
+                _ -> false
+              end)
 
             %{
               name: emoji,
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index e826bff6f..3a5063d4a 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -214,24 +214,24 @@ defmodule Pleroma.Web.Router do
     scope "/packs" do
       pipe_through(:admin_api)
 
-      post("/import_from_fs", EmojiAPIController, :import_from_fs)
-      post("/:pack_name/update_file", EmojiAPIController, :update_file)
-      post("/:pack_name/update_metadata", EmojiAPIController, :update_metadata)
-      put("/:name", EmojiAPIController, :create)
+      get("/import", EmojiAPIController, :import_from_filesystem)
+      get("/remote", EmojiAPIController, :remote)
+      post("/download", EmojiAPIController, :download)
+
+      post("/:name", EmojiAPIController, :create)
+      patch("/:name", EmojiAPIController, :update)
       delete("/:name", EmojiAPIController, :delete)
 
-      # Note: /download_from downloads and saves to instance, not to requester
-      post("/download_from", EmojiAPIController, :save_from)
+      post("/:name/files", EmojiAPIController, :add_file)
+      patch("/:name/files", EmojiAPIController, :update_file)
+      delete("/:name/files", EmojiAPIController, :delete_file)
     end
 
     # Pack info / downloading
     scope "/packs" do
-      get("/", EmojiAPIController, :list_packs)
-      get("/:name/download_shared/", EmojiAPIController, :download_shared)
-      get("/list_from", EmojiAPIController, :list_from)
-
-      # Deprecated: POST /api/pleroma/emoji/packs/list_from (use GET instead)
-      post("/list_from", EmojiAPIController, :list_from)
+      get("/", EmojiAPIController, :list)
+      get("/:name", EmojiAPIController, :show)
+      get("/:name/archive", EmojiAPIController, :archive)
     end
   end
 
@@ -405,7 +405,7 @@ defmodule Pleroma.Web.Router do
     post("/notifications/clear", NotificationController, :clear)
     delete("/notifications/destroy_multiple", NotificationController, :destroy_multiple)
     # Deprecated: was removed in Mastodon v3, use `/notifications/:id/dismiss` instead
-    post("/notifications/dismiss", NotificationController, :dismiss)
+    post("/notifications/dismiss", NotificationController, :dismiss_via_body)
 
     post("/polls/:id/votes", PollController, :vote)
 
@@ -594,6 +594,7 @@ defmodule Pleroma.Web.Router do
     post("/users/:nickname/outbox", ActivityPubController, :update_outbox)
     post("/api/ap/upload_media", ActivityPubController, :upload_media)
 
+    # The following two are S2S as well, see `ActivityPub.fetch_follow_information_for_user/1`:
     get("/users/:nickname/followers", ActivityPubController, :followers)
     get("/users/:nickname/following", ActivityPubController, :following)
   end
diff --git a/lib/pleroma/web/templates/layout/static_fe.html.eex b/lib/pleroma/web/templates/layout/static_fe.html.eex
index 819632cec..dc0ee2a5c 100644
--- a/lib/pleroma/web/templates/layout/static_fe.html.eex
+++ b/lib/pleroma/web/templates/layout/static_fe.html.eex
@@ -5,7 +5,7 @@
     <meta name="viewport" content="width=device-width,initial-scale=1,minimal-ui" />
     <title><%= Pleroma.Config.get([:instance, :name]) %></title>
     <%= Phoenix.HTML.raw(assigns[:meta] || "") %>
-    <link rel="stylesheet" href="/static/static-fe.css">
+    <link rel="stylesheet" href="/static-fe/static-fe.css">
   </head>
   <body>
     <div class="container">
diff --git a/lib/pleroma/web/twitter_api/twitter_api.ex b/lib/pleroma/web/twitter_api/twitter_api.ex
index cf1d9c74c..5cfb385ac 100644
--- a/lib/pleroma/web/twitter_api/twitter_api.ex
+++ b/lib/pleroma/web/twitter_api/twitter_api.ex
@@ -3,54 +3,27 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
+  import Pleroma.Web.Gettext
+
   alias Pleroma.Emails.Mailer
   alias Pleroma.Emails.UserEmail
   alias Pleroma.Repo
   alias Pleroma.User
   alias Pleroma.UserInviteToken
 
-  require Pleroma.Constants
-
   def register_user(params, opts \\ []) do
     params =
       params
-      |> Map.take([
-        :nickname,
-        :password,
-        :captcha_solution,
-        :captcha_token,
-        :captcha_answer_data,
-        :token,
-        :email,
-        :trusted_app
-      ])
-      |> Map.put(:bio, User.parse_bio(params[:bio] || ""))
-      |> Map.put(:name, params.fullname)
-      |> Map.put(:password_confirmation, params[:confirm])
-
-    case validate_captcha(params) do
-      :ok ->
-        if Pleroma.Config.get([:instance, :registrations_open]) do
-          create_user(params, opts)
-        else
-          create_user_with_invite(params, opts)
-        end
+      |> Map.take([:email, :token, :password])
+      |> Map.put(:bio, params |> Map.get(:bio, "") |> User.parse_bio())
+      |> Map.put(:nickname, params[:username])
+      |> Map.put(:name, Map.get(params, :fullname, params[:username]))
+      |> Map.put(:password_confirmation, params[:password])
 
-      {:error, error} ->
-        # I have no idea how this error handling works
-        {:error, %{error: Jason.encode!(%{captcha: [error]})}}
-    end
-  end
-
-  defp validate_captcha(params) do
-    if params[:trusted_app] || not Pleroma.Config.get([Pleroma.Captcha, :enabled]) do
-      :ok
+    if Pleroma.Config.get([:instance, :registrations_open]) do
+      create_user(params, opts)
     else
-      Pleroma.Captcha.validate(
-        params.captcha_token,
-        params.captcha_solution,
-        params.captcha_answer_data
-      )
+      create_user_with_invite(params, opts)
     end
   end
 
@@ -75,16 +48,17 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
 
       {:error, changeset} ->
         errors =
-          Ecto.Changeset.traverse_errors(changeset, fn {msg, _opts} -> msg end)
+          changeset
+          |> Ecto.Changeset.traverse_errors(fn {msg, _opts} -> msg end)
           |> Jason.encode!()
 
-        {:error, %{error: errors}}
+        {:error, errors}
     end
   end
 
   def password_reset(nickname_or_email) do
     with true <- is_binary(nickname_or_email),
-         %User{local: true, email: email} = user when not is_nil(email) <-
+         %User{local: true, email: email} = user when is_binary(email) <-
            User.get_by_nickname_or_email(nickname_or_email),
          {:ok, token_record} <- Pleroma.PasswordResetToken.create_token(user) do
       user
@@ -106,4 +80,58 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
         {:error, "unknown user"}
     end
   end
+
+  def validate_captcha(app, params) do
+    if app.trusted || not Pleroma.Captcha.enabled?() do
+      :ok
+    else
+      do_validate_captcha(params)
+    end
+  end
+
+  defp do_validate_captcha(params) do
+    with :ok <- validate_captcha_presence(params),
+         :ok <-
+           Pleroma.Captcha.validate(
+             params[:captcha_token],
+             params[:captcha_solution],
+             params[:captcha_answer_data]
+           ) do
+      :ok
+    else
+      {:error, :captcha_error} ->
+        captcha_error(dgettext("errors", "CAPTCHA Error"))
+
+      {:error, :invalid} ->
+        captcha_error(dgettext("errors", "Invalid CAPTCHA"))
+
+      {:error, :kocaptcha_service_unavailable} ->
+        captcha_error(dgettext("errors", "Kocaptcha service unavailable"))
+
+      {:error, :expired} ->
+        captcha_error(dgettext("errors", "CAPTCHA expired"))
+
+      {:error, :already_used} ->
+        captcha_error(dgettext("errors", "CAPTCHA already used"))
+
+      {:error, :invalid_answer_data} ->
+        captcha_error(dgettext("errors", "Invalid answer data"))
+
+      {:error, error} ->
+        captcha_error(error)
+    end
+  end
+
+  defp validate_captcha_presence(params) do
+    [:captcha_solution, :captcha_token, :captcha_answer_data]
+    |> Enum.find_value(:ok, fn key ->
+      unless is_binary(params[key]) do
+        error = dgettext("errors", "Invalid CAPTCHA (Missing parameter: %{name})", name: key)
+        {:error, error}
+      end
+    end)
+  end
+
+  # For some reason FE expects error message to be a serialized JSON
+  defp captcha_error(error), do: {:error, Jason.encode!(%{captcha: [error]})}
 end