hide own studio commissions in My Commissions page

Fixes: #592

lib/banchan/commissions/commissions.ex

@@ -88,6 +88,8 @@ defmodule Banchan.Commissions do
 
     * `page` - The page number to return. Defaults to 1.
     * `page_size` - The number of items to return per page. Defaults to 24.
+    * `exclude_member` - Exclude commissions where the current user is a
+      member of the studio.
     * `order_by` - Sort order, and in some cases, filters. Defaults to
       `:recently_updated`. Supports the following values:
       * `:recently_updated` - List by most recently updated commissions (with
@@ -102,6 +104,7 @@ defmodule Banchan.Commissions do
         opts \\ []
       ) do
     main_dashboard_query(user)
+    |> dashboard_exclude_member(opts)
     |> dashboard_query_filter(filter)
     |> dashboard_order_by(opts)
     |> Repo.paginate(
@@ -153,6 +156,22 @@ defmodule Banchan.Commissions do
     end
   end
 
+  defp dashboard_exclude_member(q, opts) do
+    if Keyword.get(opts, :exclude_member, false) do
+      q
+      |> join(
+        :left,
+        [current_user: u, studio: s],
+        current_member in assoc(s, :artists),
+        on: current_member.id == u.id,
+        as: :current_member
+      )
+      |> where([current_member: current_member], is_nil(current_member.id))
+    else
+      q
+    end
+  end
+
   defp dashboard_order_by(q, opts) do
     case Keyword.fetch(opts, :order_by) do
       {:ok, :recently_updated} ->

lib/banchan_web/live/commission_live/index.ex

@@ -42,13 +42,6 @@ defmodule BanchanWeb.CommissionLive do
       |> assign(status_options: @status_options)
       |> assign(filter_open: Map.get(socket.assigns, :filter_open, false))
 
-    socket =
-      socket
-      |> assign(
-        :results,
-        list_comms(socket)
-      )
-
     socket =
       case params do
         %{"commission_id" => commission_id} ->
@@ -124,6 +117,13 @@ defmodule BanchanWeb.CommissionLive do
         end
       )
 
+    socket =
+      socket
+      |> assign(
+        :results,
+        list_comms(socket)
+      )
+
     socket =
       Context.put(socket,
         commission: socket.assigns.commission,
@@ -335,6 +335,7 @@ defmodule BanchanWeb.CommissionLive do
     Commissions.list_commissions(
       socket.assigns.current_user,
       Ecto.Changeset.apply_changes(socket.assigns.filter),
+      exclude_member: is_nil(socket.assigns.studio),
       page: page,
       page_size: 10,
       order_by: socket.assigns.order_by