// Copyright 2007, Google Inc.
//
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions are met:
//
//  1. Redistributions of source code must retain the above copyright notice, 
//     this list of conditions and the following disclaimer.
//  2. Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
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//     used to endorse or promote products derived from this software without
//     specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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#include "gears/workerpool/common/workerpool_utils.h"

#include "gears/base/common/js_runner.h"
#include "gears/base/common/string_utils.h"

const char16 *kWorkerInsertedFactoryName    = STRING16(L"gearsFactory");
const char16 *kWorkerInsertedWorkerPoolName = STRING16(L"gearsWorkerPool");

const char *kWorkerInsertedFactoryNameAscii    = "gearsFactory";
const char *kWorkerInsertedWorkerPoolNameAscii = "gearsWorkerPool";

const char16 *kWorkerInsertedPreamble = STRING16(
  L"var google = {};"
  L"google.gears = {};"
  L"google.gears.factory = gearsFactory;"
  L"google.gears.workerPool = gearsWorkerPool;");

// The "owning" worker is the first worker that creates the workerpool and
// whose deletion causes the workerpool to shutdown.
const int kOwningWorkerId = 0;
const int kInvalidWorkerId = -1;

static const char16 *kGearsWorkerContentType = STRING16(
    L"application/x-gears-worker");

void FormatWorkerPoolErrorMessage(const JsErrorInfo &error_info,
                                  int src_worker_id,
                                  std::string16 *message) {
  *message = STRING16(L"Error in worker ");
  *message += IntegerToString16(src_worker_id);

  if (error_info.line != 0) {
    *message += STRING16(L" at line ");
    *message += IntegerToString16(error_info.line);
  }

  *message += STRING16(L". ");
  *message += error_info.message;
}

bool HasGearsWorkerContentType(HttpRequest *request) {
  std::string16 content_type;
  request->GetResponseHeader(HttpConstants::kContentTypeHeader, &content_type);
  LowerString(content_type);

  std::string::size_type semicolon_pos = content_type.find(STRING16(L";"));
  if (semicolon_pos != std::string::npos) {
    content_type = content_type.substr(0, semicolon_pos);
  }

  content_type = StripWhiteSpace(content_type);

  std::string16 worker_url;
  request->GetFinalUrl(&worker_url);
  std::string16 message(STRING16(L"Worker '"));
  message += worker_url;
  message += STRING16(L"' is cross-origin. Content-type is '");
  message += content_type;
  message += STRING16(L"'.");
  LOG((String16ToUTF8(message).c_str()));

  return content_type == kGearsWorkerContentType;
}