feat: add links to cancel anonymous participations in emails

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/graphql/resolvers/participant.ex

@@ -176,7 +176,9 @@ defmodule Mobilizon.GraphQL.Resolvers.Participant do
 
         case Participations.leave(event, actor, %{local: false, cancellation_token: token}) do
           {:ok, _activity, %Participant{id: participant_id} = _participant} ->
-            {:ok, %{event: %{id: event_id}, actor: %{id: actor_id}, id: participant_id}}
+            {:ok, %Event{} = event} = Events.get_event_with_preload(event_id)
+            %Actor{} = actor = Actors.get_actor_with_preload!(actor_id)
+            {:ok, %{event: event, actor: actor, id: participant_id}}
 
           {:error, :is_only_organizer} ->
             {:error,
@@ -202,8 +204,11 @@ defmodule Mobilizon.GraphQL.Resolvers.Participant do
     with {:is_owned, %Actor{} = actor} <- User.owns_actor(user, actor_id),
          {:has_event, {:ok, %Event{} = event}} <-
            {:has_event, Events.get_event_with_preload(event_id)},
-         {:ok, _activity, _participant} <- Participations.leave(event, actor) do
-      {:ok, %{event: %{id: event_id}, actor: %{id: actor_id}}}
+         {:ok, _activity, %Participant{id: participant_id} = _participant} <-
+           Participations.leave(event, actor) do
+      {:ok, %Event{} = event} = Events.get_event_with_preload(event_id)
+      %Actor{} = actor = Actors.get_actor_with_preload!(actor_id)
+      {:ok, %{event: event, actor: actor, id: participant_id}}
     else
       {:has_event, _} ->
         {:error, "Event with this ID #{inspect(event_id)} doesn't exist"}

lib/graphql/schema/events/participant.ex

@@ -90,8 +90,8 @@ defmodule Mobilizon.GraphQL.Schema.Events.ParticipantType do
   object :deleted_participant do
     meta(:authorize, :all)
     field(:id, :id, description: "The participant ID")
-    field(:event, :deleted_object, description: "The participant's event")
-    field(:actor, :deleted_object, description: "The participant's actor")
+    field(:event, :event, description: "The participant's event")
+    field(:actor, :actor, description: "The participant's actor")
   end
 
   object :participant_mutations do

lib/web/controllers/page_controller.ex

@@ -26,6 +26,8 @@ defmodule Mobilizon.Web.PageController do
   defdelegate moderation_report(conn, params), to: PageController, as: :index
   @spec participation_email_confirmation(Plug.Conn.t(), any) :: Plug.Conn.t()
   defdelegate participation_email_confirmation(conn, params), to: PageController, as: :index
+  @spec participation_email_cancellation(Plug.Conn.t(), any) :: Plug.Conn.t()
+  defdelegate participation_email_cancellation(conn, params), to: PageController, as: :index
   @spec user_email_validation(Plug.Conn.t(), any) :: Plug.Conn.t()
   defdelegate user_email_validation(conn, params), to: PageController, as: :index
   @spec my_groups(Plug.Conn.t(), any) :: Plug.Conn.t()

lib/web/email/participation.ex

@@ -99,6 +99,7 @@ defmodule Mobilizon.Web.Email.Participation do
       locale: locale,
       event: event,
       jsonLDMetadata: json_ld(participant),
+      participant: participant,
       subject: subject
     })
   end
@@ -123,6 +124,7 @@ defmodule Mobilizon.Web.Email.Participation do
       locale: locale,
       event: event,
       jsonLDMetadata: json_ld(participant),
+      participant: participant,
       subject: subject
     })
   end

lib/web/router.ex

@@ -195,6 +195,12 @@ defmodule Mobilizon.Web.Router do
 
     get("/participation/email/confirm/:token", PageController, :participation_email_confirmation)
 
+    get(
+      "/participation/email/cancel/:uuid/:token",
+      PageController,
+      :participation_email_cancellation
+    )
+
     get("/validate/email/:token", PageController, :user_email_validation)
 
     get("/groups/me", PageController, :my_groups)

lib/web/templates/email/anonymous_participation_confirmation.html.heex

@@ -87,14 +87,39 @@
           style="padding: 20px 30px 40px 30px; color: #474467; font-family: 'Roboto', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;"
         >
           <p style="margin: 0">
-            <%= ngettext(
-              "Would you wish to cancel your attendance, visit the event page through the link above and click the « Attending » button.",
-              "Would you wish to cancel your attendance to one or several events, visit the event pages through the links above and click the « Attending » button.",
-              1
+            <%= gettext(
+              "If you wish to cancel your participation, simply click on the link below."
             ) %>
           </p>
         </td>
       </tr>
+      <tr>
+        <td bgcolor="#ffffff" align="left">
+          <table width="100%" border="0" cellspacing="0" cellpadding="0">
+            <tr>
+              <td bgcolor="#ffffff" align="center" style="padding: 20px 30px 60px 30px;">
+                <table border="0" cellspacing="0" cellpadding="0">
+                  <tr>
+                    <td align="center" style="border-radius: 3px;">
+                      <a
+                        href={
+                          ~p"/participation/email/cancel/#{@event.uuid}/#{@participant.metadata.cancellation_token}"
+                          |> url()
+                          |> URI.decode()
+                        }
+                        target="_blank"
+                        style="font-size: 20px; font-family: 'Roboto', Helvetica, Arial, sans-serif; color: #3C376E; text-decoration: none; padding: 15px 25px; border-radius: 2px; border: 1px solid #3C376E; display: inline-block;"
+                      >
+                        <%= gettext("Cancel my attendance") %>
+                      </a>
+                    </td>
+                  </tr>
+                </table>
+              </td>
+            </tr>
+          </table>
+        </td>
+      </tr>
       <tr>
         <td
           bgcolor="#ffffff"

lib/web/templates/email/event_participation_confirmed.html.heex

@@ -88,19 +88,62 @@
           </table>
         </td>
       </tr>
-      <tr>
-        <td
-          bgcolor="#ffffff"
-          align="left"
-          style="padding: 20px 30px 40px 30px; color: #474467; font-family: 'Roboto', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;"
-        >
-          <p style="margin: 0">
-            <%= gettext(
-              "Would you wish to update or cancel your attendance, simply access the event page through the link above and click on the Attending button."
-            ) %>
-          </p>
-        </td>
-      </tr>
+      <%= if @participant.metadata.cancellation_token do %>
+        <tr>
+          <td
+            bgcolor="#ffffff"
+            align="left"
+            style="padding: 20px 30px 40px 30px; color: #474467; font-family: 'Roboto', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;"
+          >
+            <p style="margin: 0">
+              <%= gettext(
+                "If you wish to cancel your participation, simply click on the link below."
+              ) %>
+            </p>
+          </td>
+        </tr>
+        <tr>
+          <td bgcolor="#ffffff" align="left">
+            <table width="100%" border="0" cellspacing="0" cellpadding="0">
+              <tr>
+                <td bgcolor="#ffffff" align="center" style="padding: 20px 30px 60px 30px;">
+                  <table border="0" cellspacing="0" cellpadding="0">
+                    <tr>
+                      <td align="center" style="border-radius: 3px;">
+                        <a
+                          href={
+                            ~p"/participation/email/cancel/#{@event.uuid}/#{@participant.metadata.cancellation_token}"
+                            |> url()
+                            |> URI.decode()
+                          }
+                          target="_blank"
+                          style="font-size: 20px; font-family: 'Roboto', Helvetica, Arial, sans-serif; color: #3C376E; text-decoration: none; padding: 15px 25px; border-radius: 2px; border: 1px solid #3C376E; display: inline-block;"
+                        >
+                          <%= gettext("Cancel my attendance") %>
+                        </a>
+                      </td>
+                    </tr>
+                  </table>
+                </td>
+              </tr>
+            </table>
+          </td>
+        </tr>
+      <% else %>
+        <tr>
+          <td
+            bgcolor="#ffffff"
+            align="left"
+            style="padding: 20px 30px 40px 30px; color: #474467; font-family: 'Roboto', Helvetica, Arial, sans-serif; font-size: 18px; font-weight: 400; line-height: 25px;"
+          >
+            <p style="margin: 0">
+              <%= gettext(
+                "Would you wish to update or cancel your attendance, simply access the event page through the link above and click on the Attending button."
+              ) %>
+            </p>
+          </td>
+        </tr>
+      <% end %>
     </table>
     <!--[if (gte mso 9)|(IE)]>
     </td>