feat: Add /alter random command

Author: atlas-oc

lib/octocon/alters.ex

@@ -258,6 +258,37 @@ defmodule Octocon.Alters do
     end)
   end
 
+  def get_random_alter(system_identity, fields \\ @all_fields) do
+    system_id = Accounts.id_from_system_identity(system_identity, :system)
+
+    all_alter_ids =
+      from(
+        a in Alter,
+        where: a.user_id == ^system_id,
+        select: a.id
+      )
+      |> Repo.all_regional({:user, system_identity})
+
+    if all_alter_ids == [] do
+      nil
+    else
+      random_alter_id = Enum.random(all_alter_ids)
+
+      where =
+        unwrap_system_identity_where(system_identity, [id: random_alter_id])
+
+      query =
+        Alter
+        |> where(^where)
+        |> select([a], struct(a, ^fields))
+
+      case Repo.one_regional(query, {:user, system_identity}) do
+        nil -> nil
+        alter -> {:ok, alter}
+      end
+    end
+  end
+
   @doc """
   Given the friendship level and security level of an entity, returns whether the entity can be viewed.
 

lib/octocon_discord/commands/alter.ex

@@ -19,6 +19,7 @@ defmodule OctoconDiscord.Commands.Alter do
     "delete" => &__MODULE__.delete/2,
     "view" => &__MODULE__.view/2,
     "avatar" => &__MODULE__.Avatar.command/2,
+    "random" => &__MODULE__.random/2,
     "remove-alias" => &__MODULE__.remove_alias/2,
     "remove-proxy-name" => &__MODULE__.remove_proxy_name/2,
     "extra-images" => &__MODULE__.extra_images/2,
@@ -104,6 +105,22 @@ defmodule OctoconDiscord.Commands.Alter do
     end)
   end
 
+  def random(%{system_identity: system_identity}, options) do
+    case Alters.get_random_alter(system_identity) do
+      nil ->
+        Utils.error_embed("You don't have any alters to choose from.")
+
+      {:ok, alter} ->
+        show = Utils.get_show_option(options)
+
+        [
+          embeds: [Utils.alter_embed(alter)],
+          ephemeral?: !show
+        ]
+    end
+
+  end
+
   def list(%{system_identity: system_identity}, options) do
     system_id = Accounts.id_from_system_identity(system_identity, :system)
 
@@ -320,6 +337,12 @@ defmodule OctoconDiscord.Commands.Alter do
           ]
           |> Utils.add_show_option()
       },
+      %{
+        name: "random",
+        description: "Views a random alter.",
+        type: :sub_command,
+        options: Utils.add_show_option([])
+      },
       %{
         name: "list",
         description: "Lists all of your alters.",