1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/feedback/system_logs/system_logs_fetcher_base.h"
6
7#include "base/bind.h"
8#include "base/bind_helpers.h"
9#include "content/public/browser/browser_thread.h"
10
11using content::BrowserThread;
12
13namespace system_logs {
14
15SystemLogsFetcherBase::SystemLogsFetcherBase()
16    : response_(new SystemLogsResponse),
17      num_pending_requests_(0) {
18}
19
20SystemLogsFetcherBase::~SystemLogsFetcherBase() {}
21
22void SystemLogsFetcherBase::Fetch(const SysLogsFetcherCallback& callback) {
23  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
24  DCHECK(callback_.is_null());
25  DCHECK(!callback.is_null());
26
27  callback_ = callback;
28  for (size_t i = 0; i < data_sources_.size(); ++i) {
29    data_sources_[i]->Fetch(base::Bind(&SystemLogsFetcherBase::AddResponse,
30                                       AsWeakPtr()));
31  }
32}
33
34void SystemLogsFetcherBase::AddResponse(SystemLogsResponse* response) {
35  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
36
37  for (SystemLogsResponse::const_iterator it = response->begin();
38       it != response->end();
39       ++it) {
40    // It is an error to insert an element with a pre-existing key.
41    bool ok = response_->insert(*it).second;
42    DCHECK(ok) << "Duplicate key found: " << it->first;
43  }
44
45  --num_pending_requests_;
46  if (num_pending_requests_ > 0)
47    return;
48
49  callback_.Run(response_.Pass());
50  BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, this);
51}
52
53}  // namespace system_logs
54