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 <nlohmann/json.hpp> 23 24 using json = nlohmann::json; 25 26 namespace conf 27 { 28 void from_json(const json& j, conf::SensorConfig& s) 29 { 30 j.at("type").get_to(s.type); 31 j.at("readPath").get_to(s.readPath); 32 33 /* The writePath field is optional in a configuration */ 34 auto writePath = j.find("writePath"); 35 if (writePath == j.end()) 36 { 37 s.writePath = ""; 38 } 39 else 40 { 41 j.at("writePath").get_to(s.writePath); 42 } 43 44 s.min = 0; 45 s.max = 0; 46 47 /* The min field is optional in a configuration. */ 48 auto min = j.find("min"); 49 if (min != j.end()) 50 { 51 j.at("min").get_to(s.min); 52 } 53 54 /* The max field is optional in a configuration. */ 55 auto max = j.find("max"); 56 if (max != j.end()) 57 { 58 j.at("max").get_to(s.max); 59 } 60 61 /* The timeout field is optional in a configuration. */ 62 auto timeout = j.find("timeout"); 63 if (timeout == j.end()) 64 { 65 s.timeout = Sensor::getDefaultTimeout(s.type); 66 } 67 else 68 { 69 j.at("timeout").get_to(s.timeout); 70 } 71 } 72 } // namespace conf 73 74 std::map<std::string, struct conf::SensorConfig> 75 buildSensorsFromJson(const json& data) 76 { 77 std::map<std::string, struct conf::SensorConfig> config; 78 auto sensors = data["sensors"]; 79 80 /* TODO: If no sensors, this is invalid, and we should except here or during 81 * parsing. 82 */ 83 for (const auto& sensor : sensors) 84 { 85 config[sensor["name"]] = sensor.get<struct conf::SensorConfig>(); 86 } 87 88 return config; 89 } 90