it is changed in compile time

we can't change module attributes and endpoint settings in runtime

CHANGELOG.md

@@ -19,6 +19,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Mix Tasks: `mix pleroma.database remove_embedded_objects`
 - Mix Tasks: `mix pleroma.database update_users_following_followers_counts`
 - Mix Tasks: `mix pleroma.user toggle_confirmed`
+- Mix Tasks: `mix pleroma.config migrate_to_db`
+- Mix Tasks: `mix pleroma.config migrate_from_db`
 - Federation: Support for `Question` and `Answer` objects
 - Federation: Support for reports
 - Configuration: `poll_limits` option
@@ -37,6 +39,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Admin API: added filters (role, tags, email, name) for users endpoint
 - Admin API: Endpoints for managing reports
 - Admin API: Endpoints for deleting and changing the scope of individual reported statuses
+- Admin API: Endpoints to view and change config settings.
 - AdminFE: initial release with basic user management accessible at /pleroma/admin/
 - Mastodon API: [Scheduled statuses](https://docs.joinmastodon.org/api/rest/scheduled-statuses/)
 - Mastodon API: `/api/v1/notifications/destroy_multiple` (glitch-soc extension)

config/config.exs

@@ -245,7 +245,8 @@ config :pleroma, :instance,
   healthcheck: false,
   remote_post_retention_days: 90,
   skip_thread_containment: true,
-  limit_to_local_content: :unauthenticated
+  limit_to_local_content: :unauthenticated,
+  dynamic_configuration: false
 
 config :pleroma, :markup,
   # XXX - unfortunately, inline images must be enabled by default right now, because

config/dev.exs

@@ -59,3 +59,6 @@ else
     "!!! RUNNING IN LOCALHOST DEV MODE! !!!\nFEDERATION WON'T WORK UNTIL YOU CONFIGURE A dev.secret.exs"
   )
 end
+
+if File.exists?("./config/dev.migrated.secret.exs"),
+  do: import_config("./config/dev.migrated.secret.exs")

config/prod.exs

@@ -63,3 +63,6 @@ config :logger, level: :warn
 # Finally import the config/prod.secret.exs
 # which should be versioned separately.
 import_config "prod.secret.exs"
+
+if File.exists?("./config/prod.migrated.secret.exs"),
+  do: import_config("./config/prod.migrated.secret.exs")

docs/api/admin_api.md

@@ -557,3 +557,83 @@ Note: Available `:permission_group` is currently moderator and admin. 404 is ret
     - 403 Forbidden `{"error": "error_msg"}`
     - 404 Not Found `"Not found"`
   - On success: 200 OK `{}`
+
+## `/api/pleroma/admin/config`
+### List config settings
+- Method `GET`
+- Params: none
+- Response:
+
+```json
+{
+  configs: [
+    {
+      "key": string,
+      "value": string or {} or []
+     }
+  ]
+}
+```
+
+## `/api/pleroma/admin/config`
+### Update config settings
+Module name can be passed as string, which starts with `Pleroma`, e.g. `"Pleroma.Upload"`.
+Atom or boolean value can be passed with `:` in the beginning, e.g. `":true"`, `":upload"`.
+Integer with `i:`, e.g. `"i:150"`.
+
+Compile time settings (need instance reboot):
+- all settings by this keys:
+  - `:hackney_pools`
+  - `:chat`
+  - `Pleroma.Web.Endpoint`
+  - `Pleroma.Repo`
+- part settings:
+  - `Pleroma.Captcha` -> `:seconds_valid`
+  - `Pleroma.Upload` -> `:proxy_remote`
+  - `:instance` -> `:upload_limit`
+
+- Method `POST`
+- Params:
+  - `configs` => [
+    - `key` (string)
+    - `value` (string, [], {})
+    - `delete` = true (optional, if parameter must be deleted)
+  ]
+
+- Request (example):
+
+```json
+{
+  configs: [
+    {
+      "key": "Pleroma.Upload",
+      "value": {
+        "uploader": "Pleroma.Uploaders.Local",
+        "filters": ["Pleroma.Upload.Filter.Dedupe"],
+        "link_name": ":true",
+        "proxy_remote": ":false",
+        "proxy_opts": {
+          "redirect_on_failure": ":false",
+          "max_body_length": "i:1048576",
+          "http": {
+            "follow_redirect": ":true",
+            "pool": ":upload"
+          }
+        }
+      }
+     }
+  ]
+}
+
+- Response:
+
+```json
+{
+  configs: [
+    {
+      "key": string,
+      "value": string or {} or []
+     }
+  ]
+}
+```

docs/config.md

@@ -114,6 +114,7 @@ config :pleroma, Pleroma.Emails.Mailer,
 * `remote_post_retention_days`: The default amount of days to retain remote posts when pruning the database.
 * `skip_thread_containment`: Skip filter out broken threads. The default is `false`.
 * `limit_to_local_content`: Limit unauthenticated users to search for local statutes and users only. Possible values: `:unauthenticated`, `:all` and `false`. The default is `:unauthenticated`.
+* `dynamic_configuration`: Allow transferring configuration to DB with the subsequent customization from Admin api.
 
 
 ## :logger

lib/mix/tasks/pleroma/config.ex

@@ -0,0 +1,68 @@
+defmodule Mix.Tasks.Pleroma.Config do
+  use Mix.Task
+  alias Mix.Tasks.Pleroma.Common
+  alias Pleroma.Repo
+  alias Pleroma.Web.AdminAPI.Config
+  @shortdoc "Manages the location of the config"
+  @moduledoc """
+  Manages the location of the config.
+
+  ## Transfers config from file to DB.
+
+      mix pleroma.config migrate_to_db
+
+  ## Transfers config from DB to file.
+
+      mix pleroma.config migrate_from_db ENV
+  """
+
+  def run(["migrate_to_db"]) do
+    Common.start_pleroma()
+
+    if Pleroma.Config.get([:instance, :dynamic_configuration]) do
+      Application.get_all_env(:pleroma)
+      |> Enum.reject(fn {k, _v} -> k in [Pleroma.Repo, :env] end)
+      |> Enum.each(fn {k, v} ->
+        key = to_string(k) |> String.replace("Elixir.", "")
+        {:ok, _} = Config.update_or_create(%{key: key, value: v})
+        Mix.shell().info("#{key} is migrated.")
+      end)
+
+      Mix.shell().info("Settings migrated.")
+    else
+      Mix.shell().info(
+        "Migration is not allowed by config. You can change this behavior in instance settings."
+      )
+    end
+  end
+
+  def run(["migrate_from_db", env]) do
+    Common.start_pleroma()
+
+    if Pleroma.Config.get([:instance, :dynamic_configuration]) do
+      config_path = "config/#{env}.migrated.secret.exs"
+
+      {:ok, file} = File.open(config_path, [:write])
+
+      Repo.all(Config)
+      |> Enum.each(fn config ->
+        mark = if String.starts_with?(config.key, "Pleroma."), do: ",", else: ":"
+
+        IO.write(
+          file,
+          "config :pleroma, #{config.key}#{mark} #{inspect(Config.from_binary(config.value))}\r\n"
+        )
+
+        {:ok, _} = Repo.delete(config)
+        Mix.shell().info("#{config.key} deleted from DB.")
+      end)
+
+      File.close(file)
+      System.cmd("mix", ["format", config_path])
+    else
+      Mix.shell().info(
+        "Migration is not allowed by config. You can change this behavior in instance settings."
+      )
+    end
+  end
+end

lib/mix/tasks/pleroma/emoji.ex

@@ -55,15 +55,13 @@ defmodule Mix.Tasks.Pleroma.Emoji do
   are extracted).
   """
 
-  @default_manifest Pleroma.Config.get!([:emoji, :default_manifest])
-
   def run(["ls-packs" | args]) do
     Application.ensure_all_started(:hackney)
 
     {options, [], []} = parse_global_opts(args)
 
     manifest =
-      fetch_manifest(if options[:manifest], do: options[:manifest], else: @default_manifest)
+      fetch_manifest(if options[:manifest], do: options[:manifest], else: default_manifest())
 
     Enum.each(manifest, fn {name, info} ->
       to_print = [
@@ -88,7 +86,7 @@ defmodule Mix.Tasks.Pleroma.Emoji do
 
     {options, pack_names, []} = parse_global_opts(args)
 
-    manifest_url = if options[:manifest], do: options[:manifest], else: @default_manifest
+    manifest_url = if options[:manifest], do: options[:manifest], else: default_manifest()
 
     manifest = fetch_manifest(manifest_url)
 
@@ -298,4 +296,6 @@ defmodule Mix.Tasks.Pleroma.Emoji do
 
     Tesla.client(middleware)
   end
+
+  defp default_manifest, do: Pleroma.Config.get!([:emoji, :default_manifest])
 end

lib/mix/tasks/pleroma/instance.ex

@@ -30,6 +30,7 @@ defmodule Mix.Tasks.Pleroma.Instance do
   - `--dbuser DBUSER` - the user (aka role) to use for the database connection
   - `--dbpass DBPASS` - the password to use for the database connection
   - `--indexable Y/N` - Allow/disallow indexing site by search engines
+  - `--db-configurable Y/N` - Allow/disallow configuring instance from admin part
   """
 
   def run(["gen" | rest]) do
@@ -48,7 +49,8 @@ defmodule Mix.Tasks.Pleroma.Instance do
           dbname: :string,
           dbuser: :string,
           dbpass: :string,
-          indexable: :string
+          indexable: :string,
+          db_configurable: :string
         ],
         aliases: [
           o: :output,
@@ -101,6 +103,14 @@ defmodule Mix.Tasks.Pleroma.Instance do
           "y"
         ) === "y"
 
+      db_configurable? =
+        Common.get_option(
+          options,
+          :db_configurable,
+          "Do you want to be able to configure instance from admin part? (y/n)",
+          "y"
+        ) === "y"
+
       dbhost =
         Common.get_option(options, :dbhost, "What is the hostname of your database?", "localhost")
 
@@ -144,7 +154,8 @@ defmodule Mix.Tasks.Pleroma.Instance do
           secret: secret,
           signing_salt: signing_salt,
           web_push_public_key: Base.url_encode64(web_push_public_key, padding: false),
-          web_push_private_key: Base.url_encode64(web_push_private_key, padding: false)
+          web_push_private_key: Base.url_encode64(web_push_private_key, padding: false),
+          db_configurable?: db_configurable?
         )
 
       result_psql =

lib/mix/tasks/pleroma/sample_config.eex

@@ -16,7 +16,8 @@ config :pleroma, :instance,
   notify_email: "<%= notify_email %>",
   limit: 5000,
   registrations_open: true,
-  dedupe_media: false
+  dedupe_media: false,
+  dynamic_configuration: <%= db_configurable? %>
 
 config :pleroma, :media_proxy,
   enabled: false,

lib/pleroma/application.ex

@@ -31,6 +31,7 @@ defmodule Pleroma.Application do
       [
         # Start the Ecto repository
         %{id: Pleroma.Repo, start: {Pleroma.Repo, :start_link, []}, type: :supervisor},
+        %{id: Pleroma.Config.TransferTask, start: {Pleroma.Config.TransferTask, :start_link, []}},
         %{id: Pleroma.Emoji, start: {Pleroma.Emoji, :start_link, []}},
         %{id: Pleroma.Captcha, start: {Pleroma.Captcha, :start_link, []}},
         %{
@@ -186,7 +187,7 @@ defmodule Pleroma.Application do
       else
         []
       end ++
-      if Pleroma.Config.get([Pleroma.Uploader, :proxy_remote]) do
+      if Pleroma.Config.get([Pleroma.Upload, :proxy_remote]) do
         [:upload]
       else
         []

lib/pleroma/config/transfer_task.ex

@@ -0,0 +1,41 @@
+defmodule Pleroma.Config.TransferTask do
+  use Task
+  alias Pleroma.Web.AdminAPI.Config
+
+  def start_link do
+    load_and_update_env()
+    if Pleroma.Config.get(:env) == :test, do: Ecto.Adapters.SQL.Sandbox.checkin(Pleroma.Repo)
+    :ignore
+  end
+
+  def load_and_update_env do
+    if Pleroma.Config.get([:instance, :dynamic_configuration]) do
+      Pleroma.Repo.all(Config)
+      |> Enum.each(&update_env(&1))
+    end
+  end
+
+  defp update_env(setting) do
+    try do
+      key =
+        if String.starts_with?(setting.key, "Pleroma.") do
+          "Elixir." <> setting.key
+        else
+          setting.key
+        end
+
+      Application.put_env(
+        :pleroma,
+        String.to_existing_atom(key),
+        Config.from_binary(setting.value)
+      )
+    rescue
+      e ->
+        require Logger
+
+        Logger.warn(
+          "updating env causes error, key: #{inspect(setting.key)}, error: #{inspect(e)}"
+        )
+    end
+  end
+end

lib/pleroma/emoji.ex

@@ -22,7 +22,6 @@ defmodule Pleroma.Emoji do
 
   @ets __MODULE__.Ets
   @ets_options [:ordered_set, :protected, :named_table, {:read_concurrency, true}]
-  @groups Pleroma.Config.get([:emoji, :groups])
 
   @doc false
   def start_link do
@@ -87,6 +86,8 @@ defmodule Pleroma.Emoji do
         "emoji"
       )
 
+    emoji_groups = Pleroma.Config.get([:emoji, :groups])
+
     case File.ls(emoji_dir_path) do
       {:error, :enoent} ->
         # The custom emoji directory doesn't exist,
@@ -118,7 +119,7 @@ defmodule Pleroma.Emoji do
         emojis =
           Enum.flat_map(
             packs,
-            fn pack -> load_pack(Path.join(emoji_dir_path, pack)) end
+            fn pack -> load_pack(Path.join(emoji_dir_path, pack), emoji_groups) end
           )
 
         true = :ets.insert(@ets, emojis)
@@ -129,9 +130,9 @@ defmodule Pleroma.Emoji do
     shortcode_globs = Pleroma.Config.get([:emoji, :shortcode_globs], [])
 
     emojis =
-      (load_from_file("config/emoji.txt") ++
+      (load_from_file("config/emoji.txt", emoji_groups) ++
-         load_from_file("config/custom_emoji.txt") ++
+         load_from_file("config/custom_emoji.txt", emoji_groups) ++
-         load_from_globs(shortcode_globs))
+         load_from_globs(shortcode_globs, emoji_groups))
       |> Enum.reject(fn value -> value == nil end)
 
     true = :ets.insert(@ets, emojis)
@@ -139,13 +140,13 @@ defmodule Pleroma.Emoji do
     :ok
   end
 
-  defp load_pack(pack_dir) do
+  defp load_pack(pack_dir, emoji_groups) do
     pack_name = Path.basename(pack_dir)
 
     emoji_txt = Path.join(pack_dir, "emoji.txt")
 
     if File.exists?(emoji_txt) do
-      load_from_file(emoji_txt)
+      load_from_file(emoji_txt, emoji_groups)
     else
       Logger.info(
         "No emoji.txt found for pack \"#{pack_name}\", assuming all .png files are emoji"
@@ -155,7 +156,7 @@ defmodule Pleroma.Emoji do
       |> Enum.map(fn {shortcode, rel_file} ->
         filename = Path.join("/emoji/#{pack_name}", rel_file)
 
-        {shortcode, filename, [to_string(match_extra(@groups, filename))]}
+        {shortcode, filename, [to_string(match_extra(emoji_groups, filename))]}
       end)
     end
   end
@@ -184,21 +185,21 @@ defmodule Pleroma.Emoji do
     |> Enum.filter(fn f -> Path.extname(f) in exts end)
   end
 
-  defp load_from_file(file) do
+  defp load_from_file(file, emoji_groups) do
     if File.exists?(file) do
-      load_from_file_stream(File.stream!(file))
+      load_from_file_stream(File.stream!(file), emoji_groups)
     else
       []
     end
   end
 
-  defp load_from_file_stream(stream) do
+  defp load_from_file_stream(stream, emoji_groups) do
     stream
     |> Stream.map(&String.trim/1)
     |> Stream.map(fn line ->
       case String.split(line, ~r/,\s*/) do
         [name, file] ->
-          {name, file, [to_string(match_extra(@groups, file))]}
+          {name, file, [to_string(match_extra(emoji_groups, file))]}
 
         [name, file | tags] ->
           {name, file, tags}
@@ -210,7 +211,7 @@ defmodule Pleroma.Emoji do
     |> Enum.to_list()
   end
 
-  defp load_from_globs(globs) do
+  defp load_from_globs(globs, emoji_groups) do
     static_path = Path.join(:code.priv_dir(:pleroma), "static")
 
     paths =
@@ -221,7 +222,7 @@ defmodule Pleroma.Emoji do
       |> Enum.concat()
 
     Enum.map(paths, fn path ->
-      tag = match_extra(@groups, Path.join("/", Path.relative_to(path, static_path)))
+      tag = match_extra(emoji_groups, Path.join("/", Path.relative_to(path, static_path)))
       shortcode = Path.basename(path, Path.extname(path))
       external_path = Path.join("/", Path.relative_to(path, static_path))
       {shortcode, external_path, [to_string(tag)]}

lib/pleroma/instances.ex

@@ -13,7 +13,7 @@ defmodule Pleroma.Instances do
 
   def reachability_datetime_threshold do
     federation_reachability_timeout_days =
-      Pleroma.Config.get(:instance)[:federation_reachability_timeout_days] || 0
+      Pleroma.Config.get([:instance, :federation_reachability_timeout_days], 0)
 
     if federation_reachability_timeout_days > 0 do
       NaiveDateTime.add(

lib/pleroma/plugs/uploaded_media.ex

@@ -36,7 +36,7 @@ defmodule Pleroma.Plugs.UploadedMedia do
           conn
       end
 
-    config = Pleroma.Config.get([Pleroma.Upload])
+    config = Pleroma.Config.get(Pleroma.Upload)
 
     with uploader <- Keyword.fetch!(config, :uploader),
          proxy_remote = Keyword.get(config, :proxy_remote, false),

lib/pleroma/reverse_proxy.ex

@@ -146,7 +146,7 @@ defmodule Pleroma.ReverseProxy do
     Logger.debug("#{__MODULE__} #{method} #{url} #{inspect(headers)}")
     method = method |> String.downcase() |> String.to_existing_atom()
 
-    case :hackney.request(method, url, headers, "", hackney_opts) do
+    case hackney().request(method, url, headers, "", hackney_opts) do
       {:ok, code, headers, client} when code in @valid_resp_codes ->
         {:ok, code, downcase_headers(headers), client}
 
@@ -196,7 +196,7 @@ defmodule Pleroma.ReverseProxy do
              duration,
              Keyword.get(opts, :max_read_duration, @max_read_duration)
            ),
-         {:ok, data} <- :hackney.stream_body(client),
+         {:ok, data} <- hackney().stream_body(client),
          {:ok, duration} <- increase_read_duration(duration),
          sent_so_far = sent_so_far + byte_size(data),
          :ok <- body_size_constraint(sent_so_far, Keyword.get(opts, :max_body_size)),
@@ -377,4 +377,6 @@ defmodule Pleroma.ReverseProxy do
   defp increase_read_duration(_) do
     {:ok, :no_duration_limit, :no_duration_limit}
   end
+
+  defp hackney, do: Pleroma.Config.get(:hackney, :hackney)
 end

lib/pleroma/user.ex

@@ -1036,9 +1036,7 @@ defmodule Pleroma.User do
     Pleroma.HTML.Scrubber.TwitterText
   end
 
-  @default_scrubbers Pleroma.Config.get([:markup, :scrub_policy])
+  def html_filter_policy(_), do: Pleroma.Config.get([:markup, :scrub_policy])
-
-  def html_filter_policy(_), do: @default_scrubbers
 
   def fetch_by_ap_id(ap_id) do
     ap_try = ActivityPub.make_user_from_ap_id(ap_id)

lib/pleroma/web/activity_pub/publisher.ex

@@ -88,7 +88,7 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
       true
     else
       inbox_info = URI.parse(inbox)
-      !Enum.member?(Pleroma.Config.get([:instance, :quarantined_instances], []), inbox_info.host)
+      !Enum.member?(Config.get([:instance, :quarantined_instances], []), inbox_info.host)
     end
   end
 

lib/pleroma/web/admin_api/admin_api_controller.ex

@@ -10,6 +10,8 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   alias Pleroma.Web.ActivityPub.ActivityPub
   alias Pleroma.Web.ActivityPub.Relay
   alias Pleroma.Web.AdminAPI.AccountView
+  alias Pleroma.Web.AdminAPI.Config
+  alias Pleroma.Web.AdminAPI.ConfigView
   alias Pleroma.Web.AdminAPI.ReportView
   alias Pleroma.Web.AdminAPI.Search
   alias Pleroma.Web.CommonAPI
@@ -362,6 +364,41 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
     end
   end
 
+  def config_show(conn, _params) do
+    configs = Pleroma.Repo.all(Config)
+
+    conn
+    |> put_view(ConfigView)
+    |> render("index.json", %{configs: configs})
+  end
+
+  def config_update(conn, %{"configs" => configs}) do
+    updated =
+      if Pleroma.Config.get([:instance, :dynamic_configuration]) do
+        updated =
+          Enum.map(configs, fn
+            %{"key" => key, "value" => value} ->
+              {:ok, config} = Config.update_or_create(%{key: key, value: value})
+              config
+
+            %{"key" => key, "delete" => "true"} ->
+              {:ok, _} = Config.delete(key)
+              nil
+          end)
+          |> Enum.reject(&is_nil(&1))
+
+        Pleroma.Config.TransferTask.load_and_update_env()
+        Mix.Tasks.Pleroma.Config.run(["migrate_from_db", Pleroma.Config.get(:env)])
+        updated
+      else
+        []
+      end
+
+    conn
+    |> put_view(ConfigView)
+    |> render("index.json", %{configs: updated})
+  end
+
   def errors(conn, {:error, :not_found}) do
     conn
     |> put_status(404)

lib/pleroma/web/admin_api/config.ex

@@ -0,0 +1,144 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.Config do
+  use Ecto.Schema
+  import Ecto.Changeset
+  alias __MODULE__
+  alias Pleroma.Repo
+
+  @type t :: %__MODULE__{}
+
+  schema "config" do
+    field(:key, :string)
+    field(:value, :binary)
+
+    timestamps()
+  end
+
+  @spec get_by_key(String.t()) :: Config.t() | nil
+  def get_by_key(key), do: Repo.get_by(Config, key: key)
+
+  @spec changeset(Config.t(), map()) :: Changeset.t()
+  def changeset(config, params \\ %{}) do
+    config
+    |> cast(params, [:key, :value])
+    |> validate_required([:key, :value])
+    |> unique_constraint(:key)
+  end
+
+  @spec create(map()) :: {:ok, Config.t()} | {:error, Changeset.t()}
+  def create(%{key: key, value: value}) do
+    %Config{}
+    |> changeset(%{key: key, value: transform(value)})
+    |> Repo.insert()
+  end
+
+  @spec update(Config.t(), map()) :: {:ok, Config} | {:error, Changeset.t()}
+  def update(%Config{} = config, %{value: value}) do
+    config
+    |> change(value: transform(value))
+    |> Repo.update()
+  end
+
+  @spec update_or_create(map()) :: {:ok, Config.t()} | {:error, Changeset.t()}
+  def update_or_create(%{key: key} = params) do
+    with %Config{} = config <- Config.get_by_key(key) do
+      Config.update(config, params)
+    else
+      nil -> Config.create(params)
+    end
+  end
+
+  @spec delete(String.t()) :: {:ok, Config.t()} | {:error, Changeset.t()}
+  def delete(key) do
+    with %Config{} = config <- Config.get_by_key(key) do
+      Repo.delete(config)
+    else
+      nil -> {:error, "Config with key #{key} not found"}
+    end
+  end
+
+  @spec from_binary(binary()) :: term()
+  def from_binary(value), do: :erlang.binary_to_term(value)
+
+  @spec from_binary_to_map(binary()) :: any()
+  def from_binary_to_map(binary) do
+    from_binary(binary)
+    |> do_convert()
+  end
+
+  defp do_convert([{k, v}] = value) when is_list(value) and length(value) == 1,
+    do: %{k => do_convert(v)}
+
+  defp do_convert(values) when is_list(values), do: for(val <- values, do: do_convert(val))
+
+  defp do_convert({k, v} = value) when is_tuple(value),
+    do: %{k => do_convert(v)}
+
+  defp do_convert(value) when is_binary(value) or is_atom(value) or is_map(value),
+    do: value
+
+  @spec transform(any()) :: binary()
+  def transform(entity) when is_map(entity) do
+    tuples =
+      for {k, v} <- entity,
+          into: [],
+          do: {if(is_atom(k), do: k, else: String.to_atom(k)), do_transform(v)}
+
+    Enum.reject(tuples, fn {_k, v} -> is_nil(v) end)
+    |> Enum.sort()
+    |> :erlang.term_to_binary()
+  end
+
+  def transform(entity) when is_list(entity) do
+    list = Enum.map(entity, &do_transform(&1))
+    :erlang.term_to_binary(list)
+  end
+
+  def transform(entity), do: :erlang.term_to_binary(entity)
+
+  defp do_transform(%Regex{} = value) when is_map(value), do: value
+
+  defp do_transform(value) when is_map(value) do
+    values =
+      for {key, val} <- value,
+          into: [],
+          do: {String.to_atom(key), do_transform(val)}
+
+    Enum.sort(values)
+  end
+
+  defp do_transform(value) when is_list(value) do
+    Enum.map(value, &do_transform(&1))
+  end
+
+  defp do_transform(entity) when is_list(entity) and length(entity) == 1, do: hd(entity)
+
+  defp do_transform(value) when is_binary(value) do
+    value = String.trim(value)
+
+    case String.length(value) do
+      0 ->
+        nil
+
+      _ ->
+        cond do
+          String.starts_with?(value, "Pleroma") ->
+            String.to_existing_atom("Elixir." <> value)
+
+          String.starts_with?(value, ":") ->
+            String.replace(value, ":", "") |> String.to_existing_atom()
+
+          String.starts_with?(value, "i:") ->
+            String.replace(value, "i:", "") |> String.to_integer()
+
+          true ->
+            value
+        end
+    end
+  end
+
+  defp do_transform(value), do: value
+end

lib/pleroma/web/admin_api/views/config_view.ex

@@ -0,0 +1,16 @@
+defmodule Pleroma.Web.AdminAPI.ConfigView do
+  use Pleroma.Web, :view
+
+  def render("index.json", %{configs: configs}) do
+    %{
+      configs: render_many(configs, __MODULE__, "show.json", as: :config)
+    }
+  end
+
+  def render("show.json", %{config: config}) do
+    %{
+      key: config.key,
+      value: Pleroma.Web.AdminAPI.Config.from_binary_to_map(config.value)
+    }
+  end
+end

lib/pleroma/web/endpoint.ex

@@ -91,7 +91,7 @@ defmodule Pleroma.Web.Endpoint do
     Plug.Session,
     store: :cookie,
     key: cookie_name,
-    signing_salt: {Pleroma.Config, :get, [[__MODULE__, :signing_salt], "CqaoopA2"]},
+    signing_salt: Pleroma.Config.get([__MODULE__, :signing_salt], "CqaoopA2"),
     http_only: true,
     secure: secure_cookies,
     extra: extra

lib/pleroma/web/oauth/token.ex

@@ -14,7 +14,6 @@ defmodule Pleroma.Web.OAuth.Token do
   alias Pleroma.Web.OAuth.Token
   alias Pleroma.Web.OAuth.Token.Query
 
-  @expires_in Pleroma.Config.get([:oauth2, :token_expires_in], 600)
   @type t :: %__MODULE__{}
 
   schema "oauth_tokens" do
@@ -78,7 +77,7 @@ defmodule Pleroma.Web.OAuth.Token do
 
   defp put_valid_until(changeset, attrs) do
     expires_in =
-      Map.get(attrs, :valid_until, NaiveDateTime.add(NaiveDateTime.utc_now(), @expires_in))
+      Map.get(attrs, :valid_until, NaiveDateTime.add(NaiveDateTime.utc_now(), expires_in()))
 
     changeset
     |> change(%{valid_until: expires_in})
@@ -123,4 +122,6 @@ defmodule Pleroma.Web.OAuth.Token do
   end
 
   def is_expired?(_), do: false
+
+  defp expires_in, do: Pleroma.Config.get([:oauth2, :token_expires_in], 600)
 end

lib/pleroma/web/oauth/token/response.ex

@@ -4,15 +4,13 @@ defmodule Pleroma.Web.OAuth.Token.Response do
   alias Pleroma.User
   alias Pleroma.Web.OAuth.Token.Utils
 
-  @expires_in Pleroma.Config.get([:oauth2, :token_expires_in], 600)
-
   @doc false
   def build(%User{} = user, token, opts \\ %{}) do
     %{
       token_type: "Bearer",
       access_token: token.token,
       refresh_token: token.refresh_token,
-      expires_in: @expires_in,
+      expires_in: expires_in(),
       scope: Enum.join(token.scopes, " "),
       me: user.ap_id
     }
@@ -25,8 +23,10 @@ defmodule Pleroma.Web.OAuth.Token.Response do
       access_token: token.token,
       refresh_token: token.refresh_token,
       created_at: Utils.format_created_at(token),
-      expires_in: @expires_in,
+      expires_in: expires_in(),
       scope: Enum.join(token.scopes, " ")
     }
   end
+
+  defp expires_in, do: Pleroma.Config.get([:oauth2, :token_expires_in], 600)
 end

lib/pleroma/web/router.ex

@@ -202,6 +202,9 @@ defmodule Pleroma.Web.Router do
 
     put("/statuses/:id", AdminAPIController, :status_update)
     delete("/statuses/:id", AdminAPIController, :status_delete)
+
+    get("/config", AdminAPIController, :config_show)
+    post("/config", AdminAPIController, :config_update)
   end
 
   scope "/", Pleroma.Web.TwitterAPI do

priv/repo/migrations/20190518032627_create_config.exs

@@ -0,0 +1,13 @@
+defmodule Pleroma.Repo.Migrations.CreateConfig do
+  use Ecto.Migration
+
+  def change do
+    create table(:config) do
+      add(:key, :string)
+      add(:value, :binary)
+      timestamps()
+    end
+
+    create(unique_index(:config, :key))
+  end
+end

test/config/transfer_task_test.exs

@@ -0,0 +1,35 @@
+defmodule Pleroma.Config.TransferTaskTest do
+  use Pleroma.DataCase
+
+  setup do
+    dynamic = Pleroma.Config.get([:instance, :dynamic_configuration])
+
+    Pleroma.Config.put([:instance, :dynamic_configuration], true)
+
+    on_exit(fn ->
+      Pleroma.Config.put([:instance, :dynamic_configuration], dynamic)
+    end)
+  end
+
+  test "transfer config values from db to env" do
+    refute Application.get_env(:pleroma, :test_key)
+    Pleroma.Web.AdminAPI.Config.create(%{key: "test_key", value: [live: 2, com: 3]})
+
+    Pleroma.Config.TransferTask.start_link()
+
+    assert Application.get_env(:pleroma, :test_key) == [live: 2, com: 3]
+
+    on_exit(fn ->
+      Application.delete_env(:pleroma, :test_key)
+    end)
+  end
+
+  test "non existing atom" do
+    Pleroma.Web.AdminAPI.Config.create(%{key: "undefined_atom_key", value: [live: 2, com: 3]})
+
+    assert ExUnit.CaptureLog.capture_log(fn ->
+             Pleroma.Config.TransferTask.start_link()
+           end) =~
+             "updating env causes error, key: \"undefined_atom_key\", error: %ArgumentError{message: \"argument error\"}"
+  end
+end

test/support/factory.ex

@@ -310,4 +310,17 @@ defmodule Pleroma.Factory do
       }
     }
   end
+
+  def config_factory do
+    %Pleroma.Web.AdminAPI.Config{
+      key: sequence(:key, &"some_key_#{&1}"),
+      value:
+        sequence(
+          :value,
+          fn key ->
+            :erlang.term_to_binary(%{another_key: "#{key}somevalue", another: "#{key}somevalue"})
+          end
+        )
+    }
+  end
 end

test/tasks/config_test.exs

@@ -0,0 +1,54 @@
+defmodule Mix.Tasks.Pleroma.ConfigTest do
+  use Pleroma.DataCase
+  alias Pleroma.Repo
+  alias Pleroma.Web.AdminAPI.Config
+
+  setup_all do
+    Mix.shell(Mix.Shell.Process)
+    temp_file = "config/temp.migrated.secret.exs"
+
+    dynamic = Pleroma.Config.get([:instance, :dynamic_configuration])
+
+    Pleroma.Config.put([:instance, :dynamic_configuration], true)
+
+    on_exit(fn ->
+      Mix.shell(Mix.Shell.IO)
+      Application.delete_env(:pleroma, :first_setting)
+      Application.delete_env(:pleroma, :second_setting)
+      Pleroma.Config.put([:instance, :dynamic_configuration], dynamic)
+      :ok = File.rm(temp_file)
+    end)
+
+    {:ok, temp_file: temp_file}
+  end
+
+  test "settings are migrated to db" do
+    assert Repo.all(Config) == []
+
+    Application.put_env(:pleroma, :first_setting, key: "value", key2: [Pleroma.Repo])
+    Application.put_env(:pleroma, :second_setting, key: "value2", key2: [Pleroma.Activity])
+
+    Mix.Tasks.Pleroma.Config.run(["migrate_to_db"])
+
+    first_db = Config.get_by_key("first_setting")
+    second_db = Config.get_by_key("second_setting")
+    refute Config.get_by_key("Pleroma.Repo")
+
+    assert Config.from_binary(first_db.value) == [key: "value", key2: [Pleroma.Repo]]
+    assert Config.from_binary(second_db.value) == [key: "value2", key2: [Pleroma.Activity]]
+  end
+
+  test "settings are migrated to file and deleted from db", %{temp_file: temp_file} do
+    Config.create(%{key: "setting_first", value: [key: "value", key2: [Pleroma.Activity]]})
+    Config.create(%{key: "setting_second", value: [key: "valu2", key2: [Pleroma.Repo]]})
+
+    Mix.Tasks.Pleroma.Config.run(["migrate_from_db", "temp"])
+
+    assert Repo.all(Config) == []
+    assert File.exists?(temp_file)
+    {:ok, file} = File.read(temp_file)
+
+    assert file =~ "config :pleroma, setting_first:"
+    assert file =~ "config :pleroma, setting_second:"
+  end
+end

test/tasks/instance.exs

@@ -36,6 +36,8 @@ defmodule Pleroma.InstanceTest do
         "--dbpass",
         "dbpass",
         "--indexable",
+        "y",
+        "--db-configurable",
         "y"
       ])
     end
@@ -53,6 +55,7 @@ defmodule Pleroma.InstanceTest do
     assert generated_config =~ "database: \"dbname\""
     assert generated_config =~ "username: \"dbuser\""
     assert generated_config =~ "password: \"dbpass\""
+    assert generated_config =~ "dynamic_configuration: true"
     assert File.read!(tmp_path() <> "setup.psql") == generated_setup_psql()
   end
 

test/web/admin_api/admin_api_controller_test.exs

@@ -1292,4 +1292,176 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIControllerTest do
       assert json_response(conn, :bad_request) == "Could not delete"
     end
   end
+
+  describe "GET /api/pleroma/admin/config" do
+    setup %{conn: conn} do
+      admin = insert(:user, info: %{is_admin: true})
+
+      %{conn: assign(conn, :user, admin)}
+    end
+
+    test "without any settings in db", %{conn: conn} do
+      conn = get(conn, "/api/pleroma/admin/config")
+
+      assert json_response(conn, 200) == %{"configs" => []}
+    end
+
+    test "with settings in db", %{conn: conn} do
+      config1 = insert(:config)
+      config2 = insert(:config)
+
+      conn = get(conn, "/api/pleroma/admin/config")
+
+      %{
+        "configs" => [
+          %{
+            "key" => key1,
+            "value" => _
+          },
+          %{
+            "key" => key2,
+            "value" => _
+          }
+        ]
+      } = json_response(conn, 200)
+
+      assert key1 == config1.key
+      assert key2 == config2.key
+    end
+  end
+
+  describe "POST /api/pleroma/admin/config" do
+    setup %{conn: conn} do
+      admin = insert(:user, info: %{is_admin: true})
+
+      temp_file = "config/test.migrated.secret.exs"
+
+      on_exit(fn ->
+        Application.delete_env(:pleroma, :key1)
+        Application.delete_env(:pleroma, :key2)
+        Application.delete_env(:pleroma, :key3)
+        Application.delete_env(:pleroma, :key4)
+        Application.delete_env(:pleroma, :keyaa1)
+        Application.delete_env(:pleroma, :keyaa2)
+        :ok = File.rm(temp_file)
+      end)
+
+      dynamic = Pleroma.Config.get([:instance, :dynamic_configuration])
+
+      Pleroma.Config.put([:instance, :dynamic_configuration], true)
+
+      on_exit(fn ->
+        Pleroma.Config.put([:instance, :dynamic_configuration], dynamic)
+      end)
+
+      %{conn: assign(conn, :user, admin)}
+    end
+
+    test "create new config setting in db", %{conn: conn} do
+      conn =
+        post(conn, "/api/pleroma/admin/config", %{
+          configs: [
+            %{key: "key1", value: "value1"},
+            %{
+              key: "key2",
+              value: %{
+                "nested_1" => "nested_value1",
+                "nested_2" => [
+                  %{"nested_22" => "nested_value222"},
+                  %{"nested_33" => %{"nested_44" => "nested_444"}}
+                ]
+              }
+            },
+            %{
+              key: "key3",
+              value: [
+                %{"nested_3" => ":nested_3", "nested_33" => "nested_33"},
+                %{"nested_4" => ":true"}
+              ]
+            },
+            %{
+              key: "key4",
+              value: %{"nested_5" => ":upload", "endpoint" => "https://example.com"}
+            }
+          ]
+        })
+
+      assert json_response(conn, 200) == %{
+               "configs" => [
+                 %{
+                   "key" => "key1",
+                   "value" => "value1"
+                 },
+                 %{
+                   "key" => "key2",
+                   "value" => [
+                     %{"nested_1" => "nested_value1"},
+                     %{
+                       "nested_2" => [
+                         %{"nested_22" => "nested_value222"},
+                         %{"nested_33" => %{"nested_44" => "nested_444"}}
+                       ]
+                     }
+                   ]
+                 },
+                 %{
+                   "key" => "key3",
+                   "value" => [
+                     [%{"nested_3" => "nested_3"}, %{"nested_33" => "nested_33"}],
+                     %{"nested_4" => true}
+                   ]
+                 },
+                 %{
+                   "key" => "key4",
+                   "value" => [%{"endpoint" => "https://example.com"}, %{"nested_5" => "upload"}]
+                 }
+               ]
+             }
+
+      assert Application.get_env(:pleroma, :key1) == "value1"
+
+      assert Application.get_env(:pleroma, :key2) == [
+               nested_1: "nested_value1",
+               nested_2: [
+                 [nested_22: "nested_value222"],
+                 [nested_33: [nested_44: "nested_444"]]
+               ]
+             ]
+
+      assert Application.get_env(:pleroma, :key3) == [
+               [nested_3: :nested_3, nested_33: "nested_33"],
+               [nested_4: true]
+             ]
+
+      assert Application.get_env(:pleroma, :key4) == [
+               endpoint: "https://example.com",
+               nested_5: :upload
+             ]
+    end
+
+    test "update config setting & delete", %{conn: conn} do
+      config1 = insert(:config, key: "keyaa1")
+      config2 = insert(:config, key: "keyaa2")
+
+      conn =
+        post(conn, "/api/pleroma/admin/config", %{
+          configs: [
+            %{key: config1.key, value: "another_value"},
+            %{key: config2.key, delete: "true"}
+          ]
+        })
+
+      assert json_response(conn, 200) == %{
+               "configs" => [
+                 %{
+                   "key" => config1.key,
+                   "value" => "another_value"
+                 }
+               ]
+             }
+
+      assert Application.get_env(:pleroma, :keyaa1) == "another_value"
+      refute Application.get_env(:pleroma, :keyaa2)
+    end
+  end
 end

test/web/admin_api/config_test.exs

@@ -0,0 +1,183 @@
+defmodule Pleroma.Web.AdminAPI.ConfigTest do
+  use Pleroma.DataCase, async: true
+  import Pleroma.Factory
+  alias Pleroma.Web.AdminAPI.Config
+
+  test "get_by_key/1" do
+    config = insert(:config)
+    insert(:config)
+
+    assert config == Config.get_by_key(config.key)
+  end
+
+  test "create/1" do
+    {:ok, config} = Config.create(%{key: "some_key", value: "some_value"})
+    assert config == Config.get_by_key("some_key")
+  end
+
+  test "update/1" do
+    config = insert(:config)
+    {:ok, updated} = Config.update(config, %{value: "some_value"})
+    loaded = Config.get_by_key(config.key)
+    assert loaded == updated
+  end
+
+  test "update_or_create/1" do
+    config = insert(:config)
+    key2 = "another_key"
+
+    params = [
+      %{key: key2, value: "another_value"},
+      %{key: config.key, value: "new_value"}
+    ]
+
+    assert Repo.all(Config) |> length() == 1
+
+    Enum.each(params, &Config.update_or_create(&1))
+
+    assert Repo.all(Config) |> length() == 2
+
+    config1 = Config.get_by_key(config.key)
+    config2 = Config.get_by_key(key2)
+
+    assert config1.value == Config.transform("new_value")
+    assert config2.value == Config.transform("another_value")
+  end
+
+  test "delete/1" do
+    config = insert(:config)
+    {:ok, _} = Config.delete(config.key)
+    refute Config.get_by_key(config.key)
+  end
+
+  describe "transform/1" do
+    test "string" do
+      binary = Config.transform("value as string")
+      assert binary == :erlang.term_to_binary("value as string")
+      assert Config.from_binary(binary) == "value as string"
+    end
+
+    test "list of modules" do
+      binary = Config.transform(["Pleroma.Repo", "Pleroma.Activity"])
+      assert binary == :erlang.term_to_binary([Pleroma.Repo, Pleroma.Activity])
+      assert Config.from_binary(binary) == [Pleroma.Repo, Pleroma.Activity]
+    end
+
+    test "list of strings" do
+      binary = Config.transform(["string1", "string2"])
+      assert binary == :erlang.term_to_binary(["string1", "string2"])
+      assert Config.from_binary(binary) == ["string1", "string2"]
+    end
+
+    test "map" do
+      binary =
+        Config.transform(%{
+          "types" => "Pleroma.PostgresTypes",
+          "telemetry_event" => ["Pleroma.Repo.Instrumenter"],
+          "migration_lock" => ""
+        })
+
+      assert binary ==
+               :erlang.term_to_binary(
+                 telemetry_event: [Pleroma.Repo.Instrumenter],
+                 types: Pleroma.PostgresTypes
+               )
+
+      assert Config.from_binary(binary) == [
+               telemetry_event: [Pleroma.Repo.Instrumenter],
+               types: Pleroma.PostgresTypes
+             ]
+    end
+
+    test "complex map with nested integers, lists and atoms" do
+      binary =
+        Config.transform(%{
+          "uploader" => "Pleroma.Uploaders.Local",
+          "filters" => ["Pleroma.Upload.Filter.Dedupe"],
+          "link_name" => ":true",
+          "proxy_remote" => ":false",
+          "proxy_opts" => %{
+            "redirect_on_failure" => ":false",
+            "max_body_length" => "i:1048576",
+            "http" => %{
+              "follow_redirect" => ":true",
+              "pool" => ":upload"
+            }
+          }
+        })
+
+      assert binary ==
+               :erlang.term_to_binary(
+                 filters: [Pleroma.Upload.Filter.Dedupe],
+                 link_name: true,
+                 proxy_opts: [
+                   http: [
+                     follow_redirect: true,
+                     pool: :upload
+                   ],
+                   max_body_length: 1_048_576,
+                   redirect_on_failure: false
+                 ],
+                 proxy_remote: false,
+                 uploader: Pleroma.Uploaders.Local
+               )
+
+      assert Config.from_binary(binary) ==
+               [
+                 filters: [Pleroma.Upload.Filter.Dedupe],
+                 link_name: true,
+                 proxy_opts: [
+                   http: [
+                     follow_redirect: true,
+                     pool: :upload
+                   ],
+                   max_body_length: 1_048_576,
+                   redirect_on_failure: false
+                 ],
+                 proxy_remote: false,
+                 uploader: Pleroma.Uploaders.Local
+               ]
+    end
+
+    test "keyword" do
+      binary =
+        Config.transform(%{
+          "level" => ":warn",
+          "meta" => [":all"],
+          "webhook_url" => "https://hooks.slack.com/services/YOUR-KEY-HERE"
+        })
+
+      assert binary ==
+               :erlang.term_to_binary(
+                 level: :warn,
+                 meta: [:all],
+                 webhook_url: "https://hooks.slack.com/services/YOUR-KEY-HERE"
+               )
+
+      assert Config.from_binary(binary) == [
+               level: :warn,
+               meta: [:all],
+               webhook_url: "https://hooks.slack.com/services/YOUR-KEY-HERE"
+             ]
+    end
+
+    test "complex map with sigil" do
+      binary =
+        Config.transform(%{
+          federated_timeline_removal: [],
+          reject: [~r/comp[lL][aA][iI][nN]er/],
+          replace: []
+        })
+
+      assert binary ==
+               :erlang.term_to_binary(
+                 federated_timeline_removal: [],
+                 reject: [~r/comp[lL][aA][iI][nN]er/],
+                 replace: []
+               )
+
+      assert Config.from_binary(binary) ==
+               [federated_timeline_removal: [], reject: [~r/comp[lL][aA][iI][nN]er/], replace: []]
+    end
+  end
+end