load pixel config from json file

lib/NeoPattern/NeoPatternDto.h

@@ -0,0 +1,63 @@
+#ifndef __NEOPATTERN_STATE__
+#define __NEOPATTERN_STATE__
+
+#include <ArduinoJson.h>
+#include "NeoPattern_api_json.h"
+#include "NeoPattern_api_modes.cpp"
+#include "utils_print.h"
+#include "JsonStruct.h"
+
+// TODO move ARRAY_LENGTH to core lib
+#define ARRAY_LENGTH(array) sizeof(array)/sizeof(array[0])
+
+struct NeoPixelConfig : public JsonStruct {
+    int pin;
+    int length;
+    int brightness;
+    int updateInterval;
+    int defaultColor;
+    void mapJsonObject(JsonObject& root) {
+        root["pin"] = pin;
+        root["length"] = length;
+        root["brightness"] = brightness;
+        root["updateInterval"] = updateInterval;
+        root["defaultColor"] = defaultColor;
+    }
+    void fromJsonObject(JsonObject& json) {
+        pin = getIntAttrFromJson(json, "pin");
+        length = getIntAttrFromJson(json, "length");
+        brightness = getIntAttrFromJson(json, "brightness");
+        updateInterval = getIntAttrFromJson(json, "updateInterval");
+        defaultColor = getIntAttrFromJson(json, "defaultColor");
+    }
+};
+
+struct NeoPatternDto : public JsonStruct {
+    uint mode;
+    uint value;
+    const char* valueStr;
+    // ------------------------------------------------------------------------------------------
+    //Check if given object is valid and contains fields: JSON_MODE_NODE, JSON_VALUE
+    int verifyJsonObject(JsonObject& json){
+        return json.success() 
+            && json.containsKey(JSON_MODE_NODE)
+            && json.containsKey(JSON_VALUE);
+    };
+    void mapJsonObject(JsonObject& root) {
+        root[JSON_MODE_NODE] = mode;
+        root[JSON_VALUE] = value;
+    }
+    // Map a json object to this struct.
+    void fromJsonObject(JsonObject& json){
+        if(!verifyJsonObject(json)){
+            PRINT_MSG(Serial, "PatternState.fromJsonObject", "cannot parse JSON");
+            return;
+        }
+        mode = atoi(json[JSON_MODE_NODE]);
+        mode = mode < ARRAY_LENGTH(PIXEL_FNCS) ? mode : 0;
+        value = json[JSON_VALUE];
+        valueStr = json[JSON_VALUE];
+    };
+};
+
+#endif