Expose image subscriptions similar to hides (#527).

lib/philomena/images.ex

@@ -43,6 +43,26 @@ defmodule Philomena.Images do
     on_delete: :clear_image_notification,
     id_name: :image_id
 
+  def create_subscription(object, user) do
+    result = super(object, user)
+
+    if match?({:ok, _}, result) do
+      Image |> where(id: ^object.id) |> Repo.update_all(inc: [subscriptions_count: 1])
+    end
+
+    result
+  end
+
+  def delete_subscription(object, user) do
+    result = super(object, user)
+
+    if match?({:ok, _}, result) do
+      Image |> where(id: ^object.id) |> Repo.update_all(inc: [subscriptions_count: -1])
+    end
+
+    result
+  end
+
   @doc """
   Gets a single image.
 

lib/philomena/images/image.ex

@@ -83,6 +83,7 @@ defmodule Philomena.Images.Image do
     field :hidden_image_key, :string
     field :scratchpad, :string
     field :hides_count, :integer, default: 0
+    field :subscriptions_count, :integer, default: 0
     field :approved, :boolean
 
     field :removed_tags, {:array, :any}, default: [], virtual: true

lib/philomena/images/query.ex

@@ -110,7 +110,7 @@ defmodule Philomena.Images.Query do
   defp anonymous_fields do
     [
       int_fields:
-        ~W(id width height score upvotes downvotes hides faves pixels size orig_size comment_count source_count tag_count) ++
+        ~W(id width height score upvotes downvotes hides subscriptions faves pixels size orig_size comment_count source_count tag_count) ++
           tag_count_fields(),
       numeric_fields: ~W(uploader_id faved_by_id duplicate_id),
       float_fields: ~W(aspect_ratio wilson_score duration),

lib/philomena/images/search_index.ex

@@ -89,7 +89,8 @@ defmodule Philomena.Images.SearchIndex do
           content_official_tag_count: %{type: "integer"},
           spoiler_tag_count: %{type: "integer"},
           scratchpad: %{type: "text", analyzer: "snowball"},
-          hides: %{type: "integer"}
+          hides: %{type: "integer"},
+          subscriptions: %{type: "integer"}
         }
       }
     }
@@ -104,6 +105,7 @@ defmodule Philomena.Images.SearchIndex do
       score: image.score,
       faves: image.faves_count,
       hides: image.hides_count,
+      subscriptions: image.subscriptions_count,
       comment_count: image.comments_count,
       width: image.image_width,
       height: image.image_height,

lib/philomena/subscriptions.ex

@@ -140,6 +140,8 @@ defmodule Philomena.Subscriptions do
       def maybe_subscribe_on(multi, change_name, user, field) do
         Philomena.Subscriptions.maybe_subscribe_on(multi, __MODULE__, change_name, user, field)
       end
+
+      defoverridable create_subscription: 2, delete_subscription: 2
     end
   end
 

lib/philomena_web/image_sorter.ex

@@ -17,6 +17,7 @@ defmodule PhilomenaWeb.ImageSorter do
     size
     duration
     hides
+    subscriptions
   )
 
   def parse_sort(params, query) do

lib/philomena_web/templates/search/_form.html.slime

@@ -156,6 +156,7 @@ h1 Search
         "Sort by score": :score,
         "Sort by Wilson score": :wilson_score,
         "Sort by hides": :hides,
+        "Sort by subscriptions": :subscriptions,
         "Sort by relevance": :_score,
         "Sort by width": :width,
         "Sort by height": :height,

lib/philomena_web/views/api/json/image_view.ex

@@ -79,6 +79,7 @@ defmodule PhilomenaWeb.Api.Json.ImageView do
       downvotes: image.downvotes_count,
       faves: image.faves_count,
       hides: image.hides_count,
+      subscriptions: image.subscriptions_count,
       comment_count: image.comments_count,
       tag_count: length(image.tags),
       description: image.description,

priv/repo/migrations/20260501234567_add_subscriptions_count_to_images.exs

@@ -0,0 +1,16 @@
+defmodule Philomena.Repo.Migrations.AddSubscriptionsCountToImages do
+  use Ecto.Migration
+
+  def change do
+    alter table(:images) do
+      add :subscriptions_count, :integer, default: 0, null: false
+    end
+
+    execute("""
+    UPDATE images
+    SET subscriptions_count = (
+      SELECT COUNT(*) FROM image_subscriptions WHERE image_id = images.id
+    )
+    """)
+  end
+end