#77: order the gallery list in a more sensible way

lib/philomena_web/controllers/image_controller.ex

@@ -10,7 +10,6 @@ defmodule PhilomenaWeb.ImageController do
     Images.Image,
     Comments.Comment,
     Galleries.Gallery,
-    Galleries.Interaction,
     Textile.Renderer
   }
 
@@ -77,14 +76,13 @@ defmodule PhilomenaWeb.ImageController do
 
     watching = Images.subscribed?(image, conn.assigns.current_user)
 
-    {user_galleries, image_galleries} = image_and_user_galleries(image, conn.assigns.current_user)
+    user_galleries = user_galleries(image, conn.assigns.current_user)
 
     assigns = [
       image: image,
       comments: comments,
       image_changeset: image_changeset,
       comment_changeset: comment_changeset,
-      image_galleries: image_galleries,
       user_galleries: user_galleries,
       description: description,
       interactions: interactions,
@@ -132,28 +130,23 @@ defmodule PhilomenaWeb.ImageController do
     end
   end
 
-  defp image_and_user_galleries(_image, nil), do: {[], []}
+  defp user_galleries(_image, nil), do: []
 
-  defp image_and_user_galleries(image, user) do
-    image_galleries =
+  defp user_galleries(image, user) do
     Gallery
     |> where(creator_id: ^user.id)
-      |> join(:inner, [g], gi in Interaction,
-        on: g.id == gi.gallery_id and gi.image_id == ^image.id
+    |> join(
+      :inner_lateral,
+      [g],
+      _ in fragment(
+        "SELECT EXISTS(SELECT 1 FROM gallery_interactions gi WHERE gi.image_id = ? AND gi.gallery_id = ?)",
+        ^image.id,
+        g.id
       )
-      |> order_by(desc: :created_at)
+    )
+    |> select([g, e], {g, e.exists})
+    |> order_by(desc: :updated_at)
     |> Repo.all()
-
-    image_gallery_ids = Enum.map(image_galleries, & &1.id)
-
-    user_galleries =
-      Gallery
-      |> where(creator_id: ^user.id)
-      |> where([g], g.id not in ^image_gallery_ids)
-      |> order_by(desc: :created_at)
-      |> Repo.all()
-
-    {user_galleries, image_galleries}
   end
 
   defp load_image(conn, _opts) do

lib/philomena_web/templates/image/_add_to_gallery_dropdown.html.slime

@@ -12,21 +12,23 @@
             i.fa.fa-table>
             span.hide-mobile Featured in
 
-        = if Enum.any?(@image_galleries) or Enum.any?(@user_galleries) do
+        = if Enum.any?(@user_galleries) do
           ul.block__list.js-gallery-list
-            = for gallery <- @user_galleries do
-              li id="gallery_#{gallery.id}"
-                a.block__list__link.js-gallery-add data-fetchcomplete-hide="#gallery_#{gallery.id} .js-gallery-add" data-fetchcomplete-show="#gallery_#{gallery.id} .js-gallery-remove" data-method="post" data-remote="true" href=Routes.gallery_image_path(@conn, :create, gallery, image_id: @image.id)
-                  = gallery.title
-                a.block__list__link.active.js-gallery-remove.hidden data-fetchcomplete-hide="#gallery_#{gallery.id} .js-gallery-remove" data-fetchcomplete-show="#gallery_#{gallery.id} .js-gallery-add" data-method="delete" data-remote="true" href=Routes.gallery_image_path(@conn, :delete, gallery, image_id: @image.id)
-                  = gallery.title
-
-            = for gallery <- @image_galleries do
+            = for {gallery, present} <- @user_galleries do
+              = if present do
+                / Options to remove
                 li id="gallery_#{gallery.id}"
                   a.block__list__link.js-gallery-add.hidden data-fetchcomplete-hide="#gallery_#{gallery.id} .js-gallery-add" data-fetchcomplete-show="#gallery_#{gallery.id} .js-gallery-remove" data-method="post" data-remote="true" href=Routes.gallery_image_path(@conn, :create, gallery, image_id: @image.id)
                     = gallery.title
                   a.block__list__link.active.js-gallery-remove data-fetchcomplete-hide="#gallery_#{gallery.id} .js-gallery-remove" data-fetchcomplete-show="#gallery_#{gallery.id} .js-gallery-add" data-method="delete" data-remote="true" href=Routes.gallery_image_path(@conn, :delete, gallery, image_id: @image.id)
                     = gallery.title
+              - else
+                / Options to add
+                li id="gallery_#{gallery.id}"
+                  a.block__list__link.js-gallery-add data-fetchcomplete-hide="#gallery_#{gallery.id} .js-gallery-add" data-fetchcomplete-show="#gallery_#{gallery.id} .js-gallery-remove" data-method="post" data-remote="true" href=Routes.gallery_image_path(@conn, :create, gallery, image_id: @image.id)
+                    = gallery.title
+                  a.block__list__link.active.js-gallery-remove.hidden data-fetchcomplete-hide="#gallery_#{gallery.id} .js-gallery-remove" data-fetchcomplete-show="#gallery_#{gallery.id} .js-gallery-add" data-method="delete" data-remote="true" href=Routes.gallery_image_path(@conn, :delete, gallery, image_id: @image.id)
+                    = gallery.title
 
         .block__list
           = if @conn.assigns.current_user do

lib/philomena_web/templates/image/_image_meta.html.slime

@@ -33,7 +33,7 @@
           i.fa.fa-eye-slash
     .stretched-mobile-links
       = render PhilomenaWeb.Image.SubscriptionView, "_subscription.html", watching: @watching, image: @image, conn: @conn
-      = render PhilomenaWeb.ImageView, "_add_to_gallery_dropdown.html", image: @image, image_galleries: @image_galleries, user_galleries: @user_galleries, conn: @conn
+      = render PhilomenaWeb.ImageView, "_add_to_gallery_dropdown.html", image: @image, user_galleries: @user_galleries, conn: @conn
       a href=Routes.image_related_path(@conn, :index, @image) title="Related Images"
         i.fa.fa-sitemap>
         span.hide-limited-desktop.hide-mobile Related

lib/philomena_web/templates/image/show.html.slime

@@ -1,4 +1,4 @@
-= render PhilomenaWeb.ImageView, "_image_meta.html", image: @image, watching: @watching, image_galleries: @image_galleries, user_galleries: @user_galleries, changeset: @image_changeset, conn: @conn
+= render PhilomenaWeb.ImageView, "_image_meta.html", image: @image, watching: @watching, user_galleries: @user_galleries, changeset: @image_changeset, conn: @conn
 = render PhilomenaWeb.ImageView, "_image_page.html", image: @image, conn: @conn
 
 .layout--narrow