sources: factor out Source::URL::DeviantArt and Source::URL::Stash.

app/logical/source/url/stash.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+module Source
+  class URL::Stash < Source::URL
+    attr_reader :work_id, :username
+
+    def self.match?(url)
+      url.domain == "sta.sh"
+    end
+
+    def site_name
+      "Sta.sh"
+    end
+
+    def parse
+      case [domain, *path_segments]
+
+      # https://sta.sh/21leo8mz87ue (folder)
+      # https://sta.sh/2uk0v5wabdt (subfolder)
+      # https://sta.sh/0wxs31o7nn2 (single image)
+      in "sta.sh", work_id
+        @work_id = work_id
+
+      # https://sta.sh/zip/21leo8mz87ue
+      in "sta.sh", "zip", work_id
+        @work_id = work_id
+
+      else
+      end
+    end
+
+    def page_url
+      "https://sta.sh/#{work_id}"
+    end
+  end
+end