add json config

src/MqttConfig.h

@@ -0,0 +1,48 @@
+#ifndef __MQTT_CONFIG__
+#define __MQTT_CONFIG__
+
+#include <JsonStruct.h>
+
+#define JSON_MQTT_CLIENT_NAME "mqttClientName"
+#define JSON_MQTT_BROKER_HOST "mqttBrokerHost"
+#define JSON_MQTT_BROKER_PORT "mqttBrokerPort"
+#define JSON_MQTT_IN_TOPIC_ROOT "mqttInTopicRoot"
+#define JSON_MQTT_OUT_TOPIC_ROOT "mqttOutTopicRoot"
+
+struct MqttConfig
+{
+    const char *clientName;
+    const char *brokerHost;
+    int brokerPort;
+    const char *inTopicRoot;
+    const char *outTopicRoot;
+};
+
+struct MqttConfigJson : public MqttConfig, public JsonStruct
+{
+    void mapJsonObject(JsonObject &root)
+    {
+        root[JSON_MQTT_CLIENT_NAME] = clientName;
+        root[JSON_MQTT_BROKER_HOST] = brokerHost;
+        root[JSON_MQTT_BROKER_PORT] = brokerPort;
+        root[JSON_MQTT_IN_TOPIC_ROOT] = inTopicRoot;
+        root[JSON_MQTT_OUT_TOPIC_ROOT] = outTopicRoot;
+    }
+    void fromJsonObject(JsonObject &json)
+    {
+        if (!verifyJsonObject(json))
+        {
+            Serial.println("ERROR: cannot parse JSON object");
+            valid = 0;
+            return;
+        }
+        clientName = getAttr(json, JSON_MQTT_CLIENT_NAME);
+        brokerHost = getAttr(json, JSON_MQTT_BROKER_HOST);
+        brokerPort = getIntAttrFromJson(json, JSON_MQTT_BROKER_PORT);
+        inTopicRoot = getAttr(json, JSON_MQTT_IN_TOPIC_ROOT);
+        outTopicRoot = getAttr(json, JSON_MQTT_OUT_TOPIC_ROOT);
+        valid = 1;
+    };
+};
+
+#endif