add mix task to set\unset privacy option of notification

lib/mix/tasks/pleroma/notification_settings.ex

@@ -0,0 +1,83 @@
+defmodule Mix.Tasks.Pleroma.NotificationSettings do
+  @shortdoc "Enable&Disable privacy option for push notifications"
+  @moduledoc """
+  Example:
+
+  > mix pleroma.notification_settings --privacy-option=false --nickname-users="parallel588"  # set false only for parallel588 user
+  > mix pleroma.notification_settings --privacy-option=true # set true for all users
+
+  """
+
+  use Mix.Task
+  import Mix.Pleroma
+  import Ecto.Query
+
+  def run(args) do
+    start_pleroma()
+
+    {options, _, _} =
+      OptionParser.parse(
+        args,
+        strict: [
+          privacy_option: :boolean,
+          email_users: :string,
+          nickname_users: :string
+        ]
+      )
+
+    privacy_option = Keyword.get(options, :privacy_option)
+
+    if not is_nil(privacy_option) do
+      privacy_option
+      |> build_query(options)
+      |> Pleroma.Repo.update_all([])
+    end
+
+    shell_info("Done")
+  end
+
+  defp build_query(privacy_option, options) do
+    query =
+      from(u in Pleroma.User,
+        update: [
+          set: [
+            notification_settings:
+              fragment(
+                "jsonb_set(notification_settings, '{privacy_option}', ?)",
+                ^privacy_option
+              )
+          ]
+        ]
+      )
+
+    user_emails =
+      options
+      |> Keyword.get(:email_users, "")
+      |> String.split(",")
+      |> Enum.map(&String.trim(&1))
+      |> Enum.reject(&(&1 == ""))
+
+    query =
+      if length(user_emails) > 0 do
+        where(query, [u], u.email in ^user_emails)
+      else
+        query
+      end
+
+    user_nicknames =
+      options
+      |> Keyword.get(:nickname_users, "")
+      |> String.split(",")
+      |> Enum.map(&String.trim(&1))
+      |> Enum.reject(&(&1 == ""))
+
+    query =
+      if length(user_nicknames) > 0 do
+        where(query, [u], u.nickname in ^user_nicknames)
+      else
+        query
+      end
+
+    query
+  end
+end