Added initial Melody Playback Ability

Now, controlled via MQTT a Playback of a melody can Start, Stop, Pause 
etc. 

Settings like speed, total duration, pauses etc can be set.

functions.hpp

@@ -1,71 +1,70 @@
 #pragma once
 
-extern volatile bool playing;
+extern std::vector<uint16_t> melody_steps;
 
 
-void playback(JsonDocument doc){
-	if (doc["playback"].as<bool>()){
-		playing = true;
-		Serial.println("START Playback!");
-	}
-else if (doc["playback"].as<bool>()){ 
-		playing = false;
-		Serial.println("STOP Playback!");
-	}
-}
+void setMelodyAttributes(JsonDocument doc);
+void loadMelodyInRAM(std::vector<uint16_t> &melody_steps);
 
-void selectMelody(JsonDocument doc){
-	
-	melody.name = doc["name"].as<const char*>();      // Convert to std::string
+void setMelodyAttributes(JsonDocument doc){
+
+	melody.name = doc["name"].as<const char*>();      // Convert to std::string                  "name" : "eortastiko"
 	melody.id = doc["id"].as<uint16_t>();
 	melody.duration = doc["duration"].as<uint32_t>();
 	melody.infinite_play = doc["infinite"].as<bool>();
-	melody.interval_duration = doc["inter_dur"].as<uint16_t>();
-	melody.speed = doc["speed"].as<uint8_t>();
+	melody.interval = doc["interval"].as<uint32_t>();
+	melody.speed = doc["speed"].as<uint16_t>();
+	melody.loop_duration = doc["loop_dur"].as<uint32_t>();
 
-	Serial.printf("Name: %s, ID: %d, Duration: %lu, Inf: %s, Inter: %d, Speed: %d\n", 
-		melody.name.c_str(), 
-		melody.id, 
-		melody.duration, 
-		melody.infinite_play ? "true" : "false", 
-		melody.interval_duration, 
-		melody.speed);	
-		
+	// Print Just for Debugging Purposes
+	Serial.printf("Name: %s, ID: %d, Total Duration: %lu, Loop Duration: %lu, Interval:  %d, Speed: %d, Inf: %s\n",
+		melody.name.c_str(),
+		melody.id,
+		melody.duration,
+		melody.loop_duration,
+		melody.interval,
+		melody.speed,
+		melody.infinite_play ? "true" : "false"
+		);
 }
 
-void handleJSON(String payload) {
-	
-	JsonDocument doc;
-	DeserializationError error = deserializeJson(doc, payload);
-	
-	if (error) {
-		Serial.print("deserializeJson() failed: ");
-		Serial.println(error.c_str());
+void loadMelodyInRAM(std::vector<uint16_t> &melody_steps) {
+
+	// read the file and save in RAM
+
+	std::string filePath = "/" + melody.name + ".bin";
+	Serial.println("New Melody Selected !!!");
+	Serial.println("Reading data from file...");
+	//Serial.println(filePath);
+	File bin_file = SPIFFS.open(filePath.c_str(), "r");
+	if (!bin_file) {
+		Serial.println("Failed to Open File");
 		return;
 	}
-	
-	selectMelody(doc);
-	playback(doc);
-	
+
+
+	size_t fileSize = bin_file.size();
+	size_t steps = fileSize / 2;
+	melody_steps.resize(steps);
+
+	Serial.print("Opened File ! Size: ");
+	Serial.print(fileSize);
+	Serial.print(" Steps: ");
+	Serial.println(steps);
+
+	for (size_t i=0; i<steps; i++){
+		melody_steps[i] = bin_file.read() << 8 | bin_file.read();
+	}
+
+	for (size_t i=0; i<steps; i++){
+		Serial.print("Current Step: ");
+		Serial.printf("%03d  // ", i);
+		Serial.print("  HEX Value: ");
+		Serial.printf("0x%04X\n", melody_steps[i]);
+	}
+	Serial.println("Closing File");
+	bin_file.close();
+
+	// closing the file
+
 }
-
-
-
-
-
-
-
-
-/*
-possible topics: 
-
-vesper/client-id/control
-	/play
-	/stop
-
-vesper/client-id/select_melody
-	
-vesper/client-id/update_melody
-
-vesper/client-id/add_melody
-*/