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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_MEDIA_ROUTER_ISSUE_MANAGER_H_
#define CHROME_BROWSER_MEDIA_ROUTER_ISSUE_MANAGER_H_
#include <vector>
#include "base/containers/hash_tables.h"
#include "base/observer_list.h"
#include "base/threading/thread_checker.h"
#include "chrome/browser/media/router/issue.h"
#include "chrome/browser/media/router/issues_observer.h"
namespace media_router {
// IssueManager keeps track of current issues related to casting
// connectivity and quality.
// TODO(apacible): Determine what other issues will be handled here.
class IssueManager {
public:
IssueManager();
~IssueManager();
// Adds an issue.
// |issue|: Issue to be added. Must have unique ID.
void AddIssue(const Issue& issue);
// Removes an issue when user has noted it is resolved.
// |issue_id|: Issue::Id of the issue to be removed.
void ClearIssue(const Issue::Id& issue_id);
// Gets the number of unresolved issues.
size_t GetIssueCount() const;
// Removes all unresolved issues.
void ClearAllIssues();
// Removes all unresolved global issues.
void ClearGlobalIssues();
// Removes all unresolved issues with RouteId.
// |route_id|: ID of the media route whose issues are to be cleared.
void ClearIssuesWithRouteId(const MediaRoute::Id& route_id);
// Registers an issue observer |observer|. The observer will be triggered
// when the highest priority issue changes.
// If there is already an observer registered with this instance, do nothing.
// Does not assume ownership of |observer|.
// |observer|: IssuesObserver to be registered.
void RegisterObserver(IssuesObserver* observer);
// Unregisters |observer| from |issues_observers_|.
// |observer|: IssuesObserver to be unregistered.
void UnregisterObserver(IssuesObserver* observer);
private:
// Checks if the current top issue has changed. Updates |top_issue_|.
// If |top_issue_| has changed, issues in |issues_observers_| will be
// notified of the new top issue.
void MaybeUpdateTopIssue();
std::vector<Issue> issues_;
// IssueObserver insteances are not owned by the manager.
base::ObserverList<IssuesObserver> issues_observers_;
// The ID of the current top issue.
Issue::Id top_issue_id_;
base::ThreadChecker thread_checker_;
DISALLOW_COPY_AND_ASSIGN(IssueManager);
};
} // namespace media_router
#endif // CHROME_BROWSER_MEDIA_ROUTER_ISSUE_MANAGER_H_
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