Temporary commit to add document collection matching

I'll put this in its own PR. Just commiting here to see if it performs
better than #1803

app/queries/subscriber_list_query.rb

@@ -2,7 +2,7 @@ class SubscriberListQuery
   def initialize(content_id:, tags:, links:, document_type:, email_document_supertype:, government_document_supertype:)
     @content_id = content_id
     @tags = tags.symbolize_keys
-    @links = links.symbolize_keys
+    @links = links.deep_symbolize_keys
     @document_type = document_type
     @email_document_supertype = email_document_supertype
     @government_document_supertype = government_document_supertype
@@ -13,7 +13,8 @@ def lists
       lists_matched_on_document_types_and_links +
       lists_matched_on_document_types_and_tags +
       lists_matched_on_document_types_only +
-      lists_matched_on_content_id_only
+      lists_matched_on_content_id_only +
+      lists_matched_on_document_collection_id
     ).uniq(&:id)
   end
 
@@ -35,6 +36,18 @@ def lists_matched_on_content_id_only
     FindWithoutLinksAndTags.new(scope: content_id_scope).call
   end
 
+  def lists_matched_on_document_collection_id
+    return [] unless document_collection_ids
+
+    document_collection_ids.flat_map do |id|
+      FindWithoutLinksAndTags.new(scope: content_id_scope(id)).call
+    end
+  end
+
+  def document_collection_ids
+    @links[:document_collections].presence
+  end
+
   def document_type_scope
     SubscriberList
       .where(content_id: nil)
@@ -43,8 +56,8 @@ def document_type_scope
       .where(government_document_supertype: ["", @government_document_supertype])
   end
 
-  def content_id_scope
+  def content_id_scope(content_id = @content_id)
     SubscriberList
-      .where(content_id: @content_id)
+      .where(content_id:)
   end
 end

spec/queries/subscriber_list_query_spec.rb

@@ -162,6 +162,22 @@
       subscriber_list = create_subscriber_list(default_list_attributes.merge(content_id: no_match_content_id))
       expect(subject.lists).not_to include(subscriber_list)
     end
+
+    context "when matching on document collection id" do
+      let(:document_collection_id) { "4d74904a-e45e-47e4-921d-c9dc13c8c9de" }
+      let(:document_collection_attributes) { { links: { document_collections: [document_collection_id] } } }
+      let(:query) { described_class.new(**content_change_attributes.merge(document_collection_attributes)) }
+
+      it "includes lists where the content id matches the document_collection_id" do
+        subscriber_list = create_subscriber_list(default_list_attributes.merge(content_id: document_collection_id))
+        expect(query.lists).to include(subscriber_list)
+      end
+
+      it "excludes lists where the content id does not match the document_collection_id" do
+        subscriber_list = create_subscriber_list(default_list_attributes.merge(content_id: no_match_content_id))
+        expect(query.lists).not_to include(subscriber_list)
+      end
+    end
   end
 
   def create_subscriber_list(options)