1 /** 2 * Copyright 2019 Google Inc. 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 17 #include "sensors/buildjson.hpp" 18 19 #include "conf.hpp" 20 #include "sensors/sensor.hpp" 21 22 #include <cstdio> 23 #include <nlohmann/json.hpp> 24 25 using json = nlohmann::json; 26 27 namespace conf 28 { 29 void from_json(const json& j, conf::SensorConfig& s) 30 { 31 j.at("type").get_to(s.type); 32 j.at("readPath").get_to(s.readPath); 33 34 /* The writePath field is optional in a configuration */ 35 auto writePath = j.find("writePath"); 36 if (writePath == j.end()) 37 { 38 s.writePath = ""; 39 } 40 else 41 { 42 j.at("writePath").get_to(s.writePath); 43 } 44 45 s.min = 0; 46 s.max = 0; 47 48 /* The min field is optional in a configuration. */ 49 auto min = j.find("min"); 50 if (min != j.end()) 51 { 52 if (s.type == "fan") 53 { 54 j.at("min").get_to(s.min); 55 } 56 else 57 { 58 std::fprintf(stderr, "Non-fan types ignore min value specified\n"); 59 } 60 } 61 62 /* The max field is optional in a configuration. */ 63 auto max = j.find("max"); 64 if (max != j.end()) 65 { 66 if (s.type == "fan") 67 { 68 j.at("max").get_to(s.max); 69 } 70 else 71 { 72 std::fprintf(stderr, "Non-fan types ignore max value specified\n"); 73 } 74 } 75 76 /* The timeout field is optional in a configuration. */ 77 auto timeout = j.find("timeout"); 78 if (timeout == j.end()) 79 { 80 s.timeout = Sensor::getDefaultTimeout(s.type); 81 } 82 else 83 { 84 j.at("timeout").get_to(s.timeout); 85 } 86 } 87 } // namespace conf 88 89 std::map<std::string, struct conf::SensorConfig> 90 buildSensorsFromJson(const json& data) 91 { 92 std::map<std::string, struct conf::SensorConfig> config; 93 auto sensors = data["sensors"]; 94 95 /* TODO: If no sensors, this is invalid, and we should except here or during 96 * parsing. 97 */ 98 for (const auto& sensor : sensors) 99 { 100 config[sensor["name"]] = sensor.get<struct conf::SensorConfig>(); 101 } 102 103 return config; 104 } 105