add StorageAdapter#id_for

Closes GH-887.

lib/valkyrie/storage/disk.rb

@@ -21,6 +21,16 @@ def upload(file:, original_filename:, resource: nil, **_extra_arguments)
       find_by(id: Valkyrie::ID.new("disk://#{new_path}"))
     end
 
+    # @param file [IO]
+    # @param original_filename [String]
+    # @param resource [Valkyrie::Resource]
+    # @param _extra_arguments [Hash] additional arguments which may be passed to other adapters
+    # @return [Valkyrie::ID]
+    def id_for(file:, original_filename:, resource: nil, **_extra_arguments)
+      new_path = path_generator.generate(resource: resource, file: file, original_filename: original_filename)
+      Valkyrie::ID.new("disk://#{new_path}")
+    end
+
     # @param id [Valkyrie::ID]
     # @return [Boolean] true if this adapter can handle this type of identifer
     def handles?(id:)

lib/valkyrie/storage/fedora.rb

@@ -51,6 +51,19 @@ def upload(file:, original_filename:, resource:, content_type: "application/octe
       find_by(id: Valkyrie::ID.new(identifier.to_s.sub(/^.+\/\//, PROTOCOL)))
     end
 
+    # @param file [IO]
+    # @param original_filename [String]
+    # @param resource [Valkyrie::Resource]
+    # @param content_type [String] content type of file (e.g. 'image/tiff') (default='application/octet-stream')
+    # @param resource_uri_transformer [Lambda] transforms the resource's id (e.g. 'DDS78RK') into a uri (optional)
+    # @param extra_arguments [Hash] additional arguments which may be passed to other adapters
+    # @return [Valkyrie::StorageAdapter::StreamFile]
+    def id_for(file:, original_filename:, resource:, content_type: "application/octet-stream", # rubocop:disable Metrics/ParameterLists
+               resource_uri_transformer: default_resource_uri_transformer, **_extra_arguments)
+      identifier = resource_uri_transformer.call(resource, base_url) + '/original'
+      Valkyrie::ID.new(identifier.to_s.sub(/^.+\/\//, PROTOCOL))
+    end
+
     # Delete the file in Fedora associated with the given identifier.
     # @param id [Valkyrie::ID]
     def delete(id:)

lib/valkyrie/storage/memory.rb

@@ -20,6 +20,15 @@ def upload(file:, original_filename:, resource: nil, **_extra_arguments)
       cache[identifier] = Valkyrie::StorageAdapter::StreamFile.new(id: identifier, io: file)
     end
 
+    # @param file [IO]
+    # @param original_filename [String]
+    # @param resource [Valkyrie::Resource]
+    # @param _extra_arguments [Hash] additional arguments which may be passed to other adapters
+    # @return [Valkyrie::StorageAdapter::StreamFile]
+    def id_for(file:, original_filename:, resource: nil, **_extra_arguments)
+      Valkyrie::ID.new("memory://#{resource.id}")
+    end
+
     # Return the file associated with the given identifier
     # @param id [Valkyrie::ID]
     # @return [Valkyrie::StorageAdapter::StreamFile]