1 /**
2  * Copyright © 2019 IBM Corporation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 #pragma once
17 
18 #include "action.hpp"
19 #include "action_environment.hpp"
20 
21 #include <memory>
22 #include <utility>
23 #include <vector>
24 
25 namespace phosphor::power::regulators
26 {
27 
28 /**
29  * @class AndAction
30  *
31  * Executes a sequence of actions and tests whether all of them returned true.
32  *
33  * Implements the "and" action in the JSON config file.
34  */
35 class AndAction : public Action
36 {
37   public:
38     // Specify which compiler-generated methods we want
39     AndAction() = delete;
40     AndAction(const AndAction&) = delete;
41     AndAction(AndAction&&) = delete;
42     AndAction& operator=(const AndAction&) = delete;
43     AndAction& operator=(AndAction&&) = delete;
44     virtual ~AndAction() = default;
45 
46     /**
47      * Constructor.
48      *
49      * @param actions actions to execute
50      */
51     explicit AndAction(std::vector<std::unique_ptr<Action>> actions) :
52         actions{std::move(actions)}
53     {
54     }
55 
56     /**
57      * Executes the actions specified in the constructor.
58      *
59      * Returns true if all of the actions returned true, otherwise returns
60      * false.
61      *
62      * Note: All of the actions will be executed even if an action before the
63      * end returns false.  This ensures that actions with beneficial
64      * side-effects are always executed, such as a register read that clears
65      * latched fault bits.
66      *
67      * Throws an exception if an error occurs and an action cannot be
68      * successfully executed.
69      *
70      * @param environment action execution environment
71      * @return true if all actions returned true, otherwise returns false
72      */
73     virtual bool execute(ActionEnvironment& environment) override
74     {
75         bool returnValue{true};
76         for (std::unique_ptr<Action>& action : actions)
77         {
78             if (action->execute(environment) == false)
79             {
80                 returnValue = false;
81             }
82         }
83         return returnValue;
84     }
85 
86     /**
87      * Returns the actions to execute.
88      *
89      * @return actions to execute
90      */
91     const std::vector<std::unique_ptr<Action>>& getActions() const
92     {
93         return actions;
94     }
95 
96   private:
97     /**
98      * Actions to execute.
99      */
100     std::vector<std::unique_ptr<Action>> actions{};
101 };
102 
103 } // namespace phosphor::power::regulators
104