analytics/lib/plausible_web/controllers/unsubscribe_controller.ex

defmodule PlausibleWeb.UnsubscribeController do
  use PlausibleWeb, :controller
  use Plausible.Repo
  alias Plausible.Site.{WeeklyReport, MonthlyReport}

  def weekly_report(conn, %{"website" => website, "email" => email}) do
    site = Repo.get_by(Plausible.Site, domain: website)

    Repo.get_by(WeeklyReport, site_id: site.id)
    |> WeeklyReport.remove_recipient(email)
    |> Repo.update!()

    conn
    |> assign(:skip_plausible_tracking, true)
    |> render("success.html",
      interval: "weekly",
      site: website,
      layout: {PlausibleWeb.LayoutView, "focus.html"}
    )
  end

  def monthly_report(conn, %{"website" => website, "email" => email}) do
    site = Repo.get_by(Plausible.Site, domain: website)

    Repo.get_by(MonthlyReport, site_id: site.id)
    |> MonthlyReport.remove_recipient(email)
    |> Repo.update!()

    conn
    |> assign(:skip_plausible_tracking, true)
    |> render("success.html",
      interval: "monthly",
      site: website,
      layout: {PlausibleWeb.LayoutView, "focus.html"}
    )
  end
end