Add configurable length limits for `User.bio` and `User.name`

4 files changed, 29 insertions, 18 deletions

diff --git a/config/config.exs b/config/config.exs
index 17770640a..aa4cdf409 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -253,6 +253,8 @@ config :pleroma, :instance,
   skip_thread_containment: true,
   limit_to_local_content: :unauthenticated,
   dynamic_configuration: false,
+  user_bio_length: 5000,
+  user_name_length: 100,
   external_user_synchronization: true
 
 config :pleroma, :markup,
diff --git a/docs/config.md b/docs/config.md
index 02f86dc16..8f58eaf06 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -125,6 +125,8 @@ config :pleroma, Pleroma.Emails.Mailer,
 * `safe_dm_mentions`: If set to true, only mentions at the beginning of a post will be used to address people in direct messages. This is to prevent accidental mentioning of people when talking about them (e.g. "@friend hey i really don't like @enemy"). Default: `false`.
 * `healthcheck`: If set to true, system data will be shown on ``/api/pleroma/healthcheck``.
 * `remote_post_retention_days`: The default amount of days to retain remote posts when pruning the database.
+* `user_bio_length`: A user bio maximum length (default: `5000`)
+* `user_name_length`: A user name maximum length (default: `100`)
 * `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.
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 1adb82f32..776dbbe6d 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -149,10 +149,10 @@ defmodule Pleroma.User do
   end
 
   def remote_user_creation(params) do
-    params =
-      params
-      |> Map.put(:info, params[:info] || %{})
+    bio_limit = Pleroma.Config.get([:instance, :user_bio_length], 5000)
+    name_limit = Pleroma.Config.get([:instance, :user_name_length], 100)
 
+    params = Map.put(params, :info, params[:info] || %{})
     info_cng = User.Info.remote_user_creation(%User.Info{}, params[:info])
 
     changes =
@@ -161,8 +161,8 @@ defmodule Pleroma.User do
       |> validate_required([:name, :ap_id])
       |> unique_constraint(:nickname)
       |> validate_format(:nickname, @email_regex)
-      |> validate_length(:bio, max: 5000)
-      |> validate_length(:name, max: 100)
+      |> validate_length(:bio, max: bio_limit)
+      |> validate_length(:name, max: name_limit)
       |> put_change(:local, false)
       |> put_embed(:info, info_cng)
 
@@ -185,22 +185,23 @@ defmodule Pleroma.User do
   end
 
   def update_changeset(struct, params \\ %{}) do
+    bio_limit = Pleroma.Config.get([:instance, :user_bio_length], 5000)
+    name_limit = Pleroma.Config.get([:instance, :user_name_length], 100)
+
     struct
     |> cast(params, [:bio, :name, :avatar, :following])
     |> unique_constraint(:nickname)
     |> validate_format(:nickname, local_nickname_regex())
-    |> validate_length(:bio, max: 5000)
-    |> validate_length(:name, min: 1, max: 100)
+    |> validate_length(:bio, max: bio_limit)
+    |> validate_length(:name, min: 1, max: name_limit)
   end
 
   def upgrade_changeset(struct, params \\ %{}) do
-    params =
-      params
-      |> Map.put(:last_refreshed_at, NaiveDateTime.utc_now())
+    bio_limit = Pleroma.Config.get([:instance, :user_bio_length], 5000)
+    name_limit = Pleroma.Config.get([:instance, :user_name_length], 100)
 
-    info_cng =
-      struct.info
-      |> User.Info.user_upgrade(params[:info])
+    params = Map.put(params, :last_refreshed_at, NaiveDateTime.utc_now())
+    info_cng = User.Info.user_upgrade(struct.info, params[:info])
 
     struct
     |> cast(params, [
@@ -213,8 +214,8 @@ defmodule Pleroma.User do
     ])
     |> unique_constraint(:nickname)
     |> validate_format(:nickname, local_nickname_regex())
-    |> validate_length(:bio, max: 5000)
-    |> validate_length(:name, max: 100)
+    |> validate_length(:bio, max: bio_limit)
+    |> validate_length(:name, max: name_limit)
     |> put_embed(:info, info_cng)
   end
 
@@ -241,6 +242,9 @@ defmodule Pleroma.User do
   end
 
   def register_changeset(struct, params \\ %{}, opts \\ []) do
+    bio_limit = Pleroma.Config.get([:instance, :user_bio_length], 5000)
+    name_limit = Pleroma.Config.get([:instance, :user_name_length], 100)
+
     need_confirmation? =
       if is_nil(opts[:need_confirmation]) do
         Pleroma.Config.get([:instance, :account_activation_required])
@@ -261,8 +265,8 @@ defmodule Pleroma.User do
       |> validate_exclusion(:nickname, Pleroma.Config.get([User, :restricted_nicknames]))
       |> validate_format(:nickname, local_nickname_regex())
       |> validate_format(:email, @email_regex)
-      |> validate_length(:bio, max: 1000)
-      |> validate_length(:name, min: 1, max: 100)
+      |> validate_length(:bio, max: bio_limit)
+      |> validate_length(:name, min: 1, max: name_limit)
       |> put_change(:info, info_change)
 
     changeset =
diff --git a/test/user_test.exs b/test/user_test.exs
index 556df45fd..dfa91a106 100644
--- a/test/user_test.exs
+++ b/test/user_test.exs
@@ -525,7 +525,10 @@ defmodule Pleroma.UserTest do
     end
 
     test "it restricts some sizes" do
-      [bio: 5000, name: 100]
+      bio_limit = Pleroma.Config.get([:instance, :user_bio_length], 5000)
+      name_limit = Pleroma.Config.get([:instance, :user_name_length], 100)
+
+      [bio: bio_limit, name: name_limit]
       |> Enum.each(fn {field, size} ->
         string = String.pad_leading(".", size)
         cs = User.remote_user_creation(Map.put(@valid_remote, field, string))