mobilizon/lib/web/templates/email/activity/_group_activity_item.html.heex

<%= case @activity.subject do %>
    <% :group_created -> %>
        <%= 
            dgettext("activity", "%{profile} created the group %{group}.", 
                %{
                    profile: "<b>#{Mobilizon.Actors.Actor.display_name_and_username(@activity.author)}</b>",
                    group: "<a href=\"#{
                        Routes.page_url(
                            Mobilizon.Web.Endpoint,
                            :actor,
                            @activity.subject_params["group_federated_username"]
                        ) |> URI.decode()}\">
                            #{@activity.subject_params["group_name"]}
                        </a>"
                }
            ) |> raw %>
    <% :group_updated -> %>
    <%= 
            dgettext("activity", "%{profile} updated the group %{group}.", 
                %{
                    profile: "<b>#{Mobilizon.Actors.Actor.display_name_and_username(@activity.author)}</b>",
                    group: "<a href=\"#{
                        Routes.page_url(
                            Mobilizon.Web.Endpoint,
                            :actor,
                            @activity.subject_params["group_federated_username"]
                        ) |> URI.decode()}\">
                            #{@activity.subject_params["group_name"]}
                        </a>"
                }
            ) |> raw %>
<% end %>