chrome/browser/media/router/issue_manager.cc

   1 // Copyright 2015 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/media/router/issue_manager.h"
   6
   7 #include <algorithm>
   8
   9 namespace media_router {
  10
  11 IssueManager::IssueManager() {
  12 }
  13
  14 IssueManager::~IssueManager() {
  15 }
  16
  17 void IssueManager::AddIssue(const Issue& issue) {
  18   DCHECK(thread_checker_.CalledOnValidThread());
  19   for (const Issue& next_issue : issues_) {
  20     if (next_issue.Equals(issue)) {
  21       return;
  22     }
  23   }
  24   issues_.push_back(issue);
  25   MaybeUpdateTopIssue();
  26 }
  27
  28 void IssueManager::ClearIssue(const Issue::Id& issue_id) {
  29   DCHECK(thread_checker_.CalledOnValidThread());
  30   issues_.erase(std::remove_if(issues_.begin(), issues_.end(),
  31                                [&issue_id](const Issue& issue) {
  32                                  return issue_id == issue.id();
  33                                }),
  34                 issues_.end());
  35   MaybeUpdateTopIssue();
  36 }
  37
  38 size_t IssueManager::GetIssueCount() const {
  39   DCHECK(thread_checker_.CalledOnValidThread());
  40   return issues_.size();
  41 }
  42
  43 void IssueManager::ClearAllIssues() {
  44   DCHECK(thread_checker_.CalledOnValidThread());
  45   issues_.clear();
  46   MaybeUpdateTopIssue();
  47 }
  48
  49 void IssueManager::ClearGlobalIssues() {
  50   DCHECK(thread_checker_.CalledOnValidThread());
  51   issues_.erase(
  52       std::remove_if(issues_.begin(), issues_.end(), [](const Issue& issue) {
  53         return issue.is_global();
  54       }), issues_.end());
  55   MaybeUpdateTopIssue();
  56 }
  57
  58 void IssueManager::ClearIssuesWithRouteId(const MediaRoute::Id& route_id) {
  59   DCHECK(thread_checker_.CalledOnValidThread());
  60   issues_.erase(std::remove_if(issues_.begin(), issues_.end(),
  61                                [&route_id](const Issue& issue) {
  62                                  return route_id == issue.route_id();
  63                                }),
  64                 issues_.end());
  65   MaybeUpdateTopIssue();
  66 }
  67
  68 void IssueManager::RegisterObserver(IssuesObserver* observer) {
  69   DCHECK(thread_checker_.CalledOnValidThread());
  70   DCHECK(observer);
  71   DCHECK(!issues_observers_.HasObserver(observer));
  72
  73   issues_observers_.AddObserver(observer);
  74   if (!top_issue_id_.empty()) {
  75     // Find the current top issue and report it to the observer.
  76     for (const auto& next_issue : issues_) {
  77       if (next_issue.id() == top_issue_id_) {
  78         observer->OnIssueUpdated(&next_issue);
  79       }
  80     }
  81   }
  82 }
  83
  84 void IssueManager::UnregisterObserver(IssuesObserver* observer) {
  85   DCHECK(thread_checker_.CalledOnValidThread());
  86   issues_observers_.RemoveObserver(observer);
  87 }
  88
  89 void IssueManager::MaybeUpdateTopIssue() {
  90   Issue* new_top_issue = nullptr;
  91
  92   if (issues_.empty()) {
  93     FOR_EACH_OBSERVER(IssuesObserver, issues_observers_,
  94                       OnIssueUpdated(new_top_issue));
  95     return;
  96   }
  97
  98   // Select the first blocking issue in the list of issues.
  99   // If there are none, simply select the first issue in the list.
 100   new_top_issue = &(issues_.front());
 101   for (auto it = issues_.begin(); it != issues_.end(); ++it) {
 102     // The first blocking issue is of higher priority than the first issue.
 103     if (it->is_blocking()) {
 104       new_top_issue = &(*it);
 105       break;
 106     }
 107   }
 108
 109   // If we've found a new top issue, then report it via the observer.
 110   if (new_top_issue->id() != top_issue_id_) {
 111     top_issue_id_ = new_top_issue->id();
 112     FOR_EACH_OBSERVER(IssuesObserver, issues_observers_,
 113                       OnIssueUpdated(new_top_issue));
 114   }
 115 }
 116
 117 }  // namespace media_router