// Copyright 2016 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Author: morlovich@google.com (Maksim Orlovich)

syntax = "proto2";

import "net/instaweb/rewriter/input_info.proto";

package net_instaweb;

enum DependencyType {
  DEP_JAVASCRIPT = 1;
  DEP_CSS = 2;
}

// A single candidate for pushing or preloading.
message Dependency {
  // URL. We prefer this to be the most rewritten version.
  optional string url = 1;

  // Type of the content.
  optional DependencyType content_type = 2;

  // True if this is a .pagespeed. optimized resource.
  optional bool is_pagespeed_resource = 3;

  // True if this turned out to be small enough to inline.
  optional bool can_inline = 4;

  // If this is a .pagespeed. resources, includes info on all the inputs,
  // including other_dependency, so at the time we have to decide whether to
  // push/preload we can tell if .pagespeed. resource has expired yet or not.
  repeated InputInfo validity_info = 5;

  // Encodes the order of this compared to other dependencies. The semantics
  // are lexicographic, e.g. (4) is before (4,1) is before (5).
  repeated int32 order_key = 6;
}

// All the candidates for pushing or preloading.
message Dependencies {
  repeated Dependency dependency = 1;
}