1 /**
2  * Copyright © 2020 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 #include "profile.hpp"
17 
18 #include "sdbusplus.hpp"
19 
20 #include <nlohmann/json.hpp>
21 #include <phosphor-logging/log.hpp>
22 
23 #include <algorithm>
24 #include <iterator>
25 #include <numeric>
26 
27 namespace phosphor::fan::control::json
28 {
29 
30 using json = nlohmann::json;
31 using namespace phosphor::logging;
32 
33 // String key must be in all lowercase for method lookup
34 const std::map<std::string, methodHandler> Profile::_methods = {
35     {"all_of", Profile::allOf}};
36 
37 Profile::Profile(const json& jsonObj) : ConfigBase(jsonObj), _active(false)
38 {
39     setActive(jsonObj);
40 }
41 
42 void Profile::setActive(const json& jsonObj)
43 {
44     if (!jsonObj.contains("method") || !jsonObj["method"].contains("name"))
45     {
46         // Log error on missing profile method
47         log<level::ERR>("Missing required profile method",
48                         entry("JSON=%s", jsonObj.dump().c_str()));
49         throw std::runtime_error("Missing required profile method");
50     }
51     // The method to use in determining if the profile is active
52     auto method = jsonObj["method"]["name"].get<std::string>();
53     std::transform(method.begin(), method.end(), method.begin(), tolower);
54     auto handler = _methods.find(method);
55     if (handler != _methods.end())
56     {
57         // Call method for determining profile's active state
58         _active = handler->second(jsonObj["method"]);
59     }
60     else
61     {
62         // Construct list of available methods
63         auto methods = std::accumulate(std::next(_methods.begin()),
64                                        _methods.end(), _methods.begin()->first,
65                                        [](auto list, auto method) {
66             return std::move(list) + ", " + method.first;
67         });
68         log<level::ERR>("Configured method not available",
69                         entry("JSON=%s", jsonObj["method"].dump().c_str()),
70                         entry("METHODS_AVAILABLE=%s", methods.c_str()));
71     }
72 }
73 
74 bool Profile::allOf(const json& method)
75 {
76     if (!method.contains("properties"))
77     {
78         log<level::ERR>("Missing required all_of method properties list",
79                         entry("JSON=%s", method.dump().c_str()));
80         throw std::runtime_error(
81             "Missing required all_of method properties list");
82     }
83 
84     return std::all_of(method["properties"].begin(), method["properties"].end(),
85                        [](const json& obj) {
86         if (!obj.contains("path") || !obj.contains("interface") ||
87             !obj.contains("property") || !obj.contains("value"))
88         {
89             log<level::ERR>(
90                 "Missing required all_of method property parameters",
91                 entry("JSON=%s", obj.dump().c_str()));
92             throw std::runtime_error(
93                 "Missing required all_of method parameters");
94         }
95         auto variant = util::SDBusPlus::getPropertyVariant<PropertyVariantType>(
96             obj["path"].get<std::string>(), obj["interface"].get<std::string>(),
97             obj["property"].get<std::string>());
98 
99         return getJsonValue(obj["value"]) == variant;
100     });
101 }
102 
103 } // namespace phosphor::fan::control::json
104