posts: move expunged image to trash folder.

When a post is expunged, move the image to a trash folder so it can be
recovered if needed.

app/logical/storage_manager.rb

@@ -50,6 +50,24 @@ class StorageManager
     raise NotImplementedError, "open not implemented"
   end
 
+  # Copy the file from src_path to dest_path.
+  #
+  # @param src_path [String] The file to copy.
+  # @param dest_path [String] The location to copy the file to.
+  def copy(src_path, dest_path)
+    file = open(src_path)
+    store(file, dest_path)
+  end
+
+  # Move the file from src_path to dest_path.
+  #
+  # @param src_path [String] The file to move.
+  # @param dest_path [String] The location to move the file to.
+  def move(src_path, dest_path)
+    copy(src_path, dest_path)
+    delete(src_path)
+  end
+
   # Return the full URL of the file at the given path, or nil if the file
   # doesn't have an URL.
   # @return [String, nil] the file URL

app/models/media_asset.rb

@@ -24,8 +24,7 @@ class MediaAsset < ApplicationRecord
 
   # Processing: The asset's files are currently being resized and distributed to the backend servers.
   # Active: The asset has been successfully uploaded and is ready to use.
-  # Deleted: The asset's files have been deleted by moving them to a trash folder. They can be undeleted
-  #          by moving them out of the trash folder. (Not implemented yet).
+  # Deleted: The asset's files have been deleted by moving them to a trash folder. They can be undeleted by moving them out of the trash folder.
   # Expunged: The asset's files have been permanently deleted.
   # Failed: The asset failed to upload. The asset may be in a partially uploaded state, with some
   #         files missing or incompletely transferred.
@@ -62,6 +61,11 @@ class MediaAsset < ApplicationRecord
       backup_storage_service.store(file, file_path)
     end
 
+    def trash_file!
+      storage_service.move(file_path, "/trash/#{file_path}")
+      backup_storage_service.move(file_path, "/trash/#{file_path}")
+    end
+
     def delete_file!
       storage_service.delete(file_path)
       backup_storage_service.delete(file_path)
@@ -276,6 +280,14 @@ class MediaAsset < ApplicationRecord
       raise
     end
 
+    def trash!
+      variants.each(&:trash_file!)
+      update!(status: :deleted)
+    rescue
+      update!(status: :failed)
+      raise
+    end
+
     def delete_files!
       variants.each(&:delete_file!)
     end

app/models/post.rb

@@ -756,7 +756,7 @@ class Post < ApplicationRecord
           decrement_tag_post_counts
           remove_from_all_pools
           remove_from_fav_groups
-          media_asset.expunge!
+          media_asset.trash!
           destroy
           update_parent_on_destroy
         end

test/unit/post_test.rb

@@ -46,10 +46,10 @@ class PostTest < ActiveSupport::TestCase
         assert_raise(StandardError) { @post.file(:original) }
       end
 
-      should "mark the media asset as expunged" do
+      should "mark the media asset as deleted" do
         @post.expunge!
 
-        assert_equal("expunged", @post.media_asset.status)
+        assert_equal("deleted", @post.media_asset.status)
       end
 
       should "remove all favorites" do
@@ -199,16 +199,16 @@ class PostTest < ActiveSupport::TestCase
     context "Expunging a post with" do
       context "a parent" do
         should "reset the has_children flag of the parent" do
-          p1 = FactoryBot.create(:post)
-          c1 = FactoryBot.create(:post, :parent_id => p1.id)
+          p1 = create(:post)
+          c1 = create(:post_with_file, parent_id: p1.id)
           c1.expunge!
           p1.reload
           assert_equal(false, p1.has_children?)
         end
 
         should "update the parent's has_children flag" do
-          p1 = FactoryBot.create(:post)
-          c1 = FactoryBot.create(:post, :parent_id => p1.id)
+          p1 = create(:post)
+          c1 = create(:post_with_file, parent_id: p1.id)
           c1.expunge!
           p1.reload
           assert(!p1.has_children?, "Parent should not have children")
@@ -217,8 +217,8 @@ class PostTest < ActiveSupport::TestCase
 
       context "one child" do
         should "remove the parent of that child" do
-          p1 = FactoryBot.create(:post)
-          c1 = FactoryBot.create(:post, :parent_id => p1.id)
+          p1 = create(:post_with_file)
+          c1 = create(:post, parent_id: p1.id)
           p1.expunge!
           c1.reload
           assert_nil(c1.parent)
@@ -229,10 +229,10 @@ class PostTest < ActiveSupport::TestCase
         setup do
           # ensure initial post versions won't be merged.
           travel_to(1.day.ago) do
-            @p1 = FactoryBot.create(:post)
-            @c1 = FactoryBot.create(:post, :parent_id => @p1.id)
-            @c2 = FactoryBot.create(:post, :parent_id => @p1.id)
-            @c3 = FactoryBot.create(:post, :parent_id => @p1.id)
+            @p1 = create(:post_with_file)
+            @c1 = create(:post, parent_id: @p1.id)
+            @c2 = create(:post, parent_id: @p1.id)
+            @c3 = create(:post, parent_id: @p1.id)
           end
         end