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// Copyright (c) 2011 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_INSTALLER_UTIL_CONDITIONAL_WORK_ITEM_LIST_H_
#define CHROME_INSTALLER_UTIL_CONDITIONAL_WORK_ITEM_LIST_H_
#include "chrome/installer/util/work_item_list.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_ptr.h"
// A WorkItemList subclass that permits conditionally executing a set of
// WorkItems.
class ConditionalWorkItemList : public WorkItemList {
public:
explicit ConditionalWorkItemList(Condition* condition);
~ConditionalWorkItemList() override;
// If condition_->ShouldRun() returns true, then execute the items in this
// list and return true iff they all succeed. If condition_->ShouldRun()
// returns false, does nothing and returns true.
bool Do() override;
// Does a rollback of the items (if any) that were run in Do.
void Rollback() override;
protected:
// Pointer to a Condition that is used to determine whether to run this
// WorkItemList.
scoped_ptr<Condition> condition_;
};
// Pre-defined conditions:
//------------------------------------------------------------------------------
class ConditionRunIfFileExists : public WorkItem::Condition {
public:
explicit ConditionRunIfFileExists(const base::FilePath& key_path)
: key_path_(key_path) {}
bool ShouldRun() const override;
private:
base::FilePath key_path_;
};
// Condition class that inverts the ShouldRun result of another Condition.
// This class assumes ownership of original_condition.
class Not : public WorkItem::Condition {
public:
explicit Not(WorkItem::Condition* original_condition);
~Not() override;
bool ShouldRun() const override;
private:
scoped_ptr<WorkItem::Condition> original_condition_;
};
#endif // CHROME_INSTALLER_UTIL_CONDITIONAL_WORK_ITEM_LIST_H_
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