working rfid, more player capabilities

src/DirectoryNode.cpp

@@ -122,6 +122,36 @@ void DirectoryNode::advanceToFirstMP3InThisNode() {
     }
 }
 
+DirectoryNode* DirectoryNode::advanceToMP3(const String* currentGlobal) {
+    for (auto subdir : subdirectories)
+    {
+        if (subdir->getName()==*currentGlobal) {
+            subdir->advanceToFirstMP3InThisNode();
+            return subdir;
+        }   
+
+        // Have each subdirectory advance its song
+        for (size_t i = 0; i < subdir->mp3Files.size(); i++)
+        {
+            if (*currentGlobal == subdir->mp3Files[i])
+            {
+                // Found the current MP3 file
+                if (i < subdir->mp3Files.size() - 1)
+                {
+                    subdir->currentPlaying = &subdir->mp3Files[i];
+                    return subdir;
+                } 
+
+            }
+        }
+    }
+
+    // If we get here, there were no MP3 files or subdirectories left to check
+    currentPlaying = nullptr;
+    Serial.println("no more nodes found");
+    return this;
+}
+
 DirectoryNode* DirectoryNode::advanceToNextMP3(const String* currentGlobal)
 {
     bool useFirst = false;

src/DirectoryNode.h

@@ -26,6 +26,7 @@ public:
   void addMP3File(const String& mp3File);
   void buildDirectoryTree(const char* currentPath);
   void printDirectoryTree(int level = 0) const;
+  DirectoryNode* advanceToMP3(const String* currentGlobal);
   DirectoryNode* advanceToNextMP3(const String* currentGlobal);
   void advanceToFirstMP3InThisNode();
   String getDirectoryStructureHTML() const;

src/WebContent.h

@@ -39,6 +39,16 @@ const char index_html[] PROGMEM = R"rawliteral(
     <button class="button" onmouseup="toggleCheckbox('start');" ontouchend="toggleCheckbox('start');">Start</button><br/><br/>
     <button class="button" onmouseup="toggleCheckbox('stop');" ontouchend="toggleCheckbox('stop');">Stop</button><br/><br/>
     <button class="button" onmouseup="toggleCheckbox('next');" ontouchend="toggleCheckbox('next');">Next</button><br/><br/>
+   <form action='playnamed' method='post'>
+     
+  <div>
+    <label for="title">Song title to play</label>
+    <input name="title" id="titleid" value="music" />
+  </div>
+  <div>
+    <button>Submit</button>
+  </div>
+   </form>
    <p>
    <h2>Content of SD Card:</h2>
    %DIRECTORY%
@@ -46,6 +56,19 @@ const char index_html[] PROGMEM = R"rawliteral(
    
    <script>
    setInterval(getState, 500);
+
+    // Get the <li> elements
+    var liElements = document.querySelectorAll('ul li');
+
+    // Add click event listener to each <li> element
+    liElements.forEach(function(li) {
+      li.addEventListener('click', function() {
+        var liText = this.innerText;
+        var inputField = document.getElementById('titleid');
+        inputField.value = liText;
+      });
+    });
+
    function toggleCheckbox(x) {
      var xhr = new XMLHttpRequest();
      xhr.open("GET", "/" + x, true);

src/globals.h

@@ -7,6 +7,8 @@ void start();
 
 void loop2(void* parameter);
 
+void named_song_action(AsyncWebServerRequest *request);
+
 boolean buttonPressed(const uint8_t pin);
 
 /**

src/main.cpp

@@ -12,6 +12,7 @@
 #include <SPI.h>
 #include <SD.h>
 #include <MFRC522.h> //RFID Reader
+#include <map>
 
 // define pins for RFID
 #define CS_RFID 32 // SIC, tried 4 and 32 but only this worked!
@@ -27,7 +28,7 @@
 
 #define CS_SDCARD 22
 
-#define RFID_LOOP_INTERVAL 10
+#define RFID_LOOP_INTERVAL 25
 
 #include "globals.h"
 #include "WebContent.h"
@@ -48,14 +49,19 @@ DNSServer dns;
 DirectoryNode rootNode("/");
 DirectoryNode *currentNode = NULL;
 
-boolean blockState = false;
-
 volatile bool newRfidInt = false;
 
 MFRC522 rfid(CS_RFID, RST_RFID); // instatiate a MFRC522 reader object.
 
 TaskHandle_t RfidTask;
 
+bool asyncStop = false;
+
+bool asyncStart = false;
+
+std::map<String, String> rfid_map{{"67 152 204 14", "bob_dylan-Forrest_Gump_Soundtrack,_Disc_1.mp3"},
+                        {"67 175 148 160","068-Der_Schatz_im_Bergsee"}};
+
 void activateSD()
 {
   digitalWrite(CS_SDCARD, LOW);
@@ -76,9 +82,29 @@ void deactivateRFID()
   digitalWrite(CS_RFID, HIGH);
 }
 
+void playSongByName(String song) {
+  currentNode = rootNode.advanceToMP3(&song);
+  String mp3File = currentNode->getCurrentPlayingFilePath();
+  Serial.println(mp3File.c_str());
+  deactivateRFID();
+  activateSD();
+  audio.connecttoSD(mp3File.c_str());
+  activateRFID();
+  deactivateSD();
+}
+
+void playSongByRFID(String id) {
+  String song = rfid_map[id];
+  Serial.println("searching for ");
+  Serial.println(song);
+  playSongByName(song);
+  
+}
+
+
+
 void playNextMp3()
 {
-  blockState = true;
   stop();
   if (currentNode == NULL)
   {
@@ -100,12 +126,11 @@ void playNextMp3()
   audio.connecttoSD(mp3File.c_str());
   activateRFID();
   deactivateSD();
-  blockState = false;
 }
 
 void audio_info(const char *info)
 {
-  // Serial.print("info        "); Serial.println(info);
+  //Serial.print("info        "); Serial.println(info);
 }
 
 void mute()
@@ -127,11 +152,6 @@ String getState()
 {
   String state = String();
 
-  if (blockState)
-  {
-    return state;
-  }
-  blockState = true;
 
   if (audio.isRunning())
   {
@@ -152,7 +172,6 @@ String getState()
     if (currentNode->getCurrentPlaying())
       state += *currentNode->getCurrentPlaying();
   }
-  blockState = false;
   return state;
 }
 
@@ -210,6 +229,7 @@ void readRFID()
   Serial.print("Tag UID: ");
   String uidString = getRFIDString(rfid.uid.uidByte);
   Serial.println(uidString);
+  playSongByRFID(uidString);
 }
 
 void setup()
@@ -294,6 +314,8 @@ void setup()
                   
                   request->send(200, "text/plain", "next");
                   next(); });
+  
+  server.on("/playnamed", HTTP_POST, named_song_action);
 
   server.begin();
 
@@ -309,18 +331,40 @@ void setup()
   Serial.println("initialization done.");
 }
 
+void named_song_action(AsyncWebServerRequest *request) {
+  Serial.println("named song!");
+
+  int params = request->params();
+  for (int i = 0; i < params; i++) {
+    AsyncWebParameter* p = request->getParam(i);
+    Serial.printf("POST[%s]: %s\n", p->name().c_str(), p->value().c_str());
+    if (p->name()=="title") {
+      playSongByName(p->value());
+    }
+  }
+  request->send_P(200, "text/html", index_html, processor);
+}
+
 void loop()
 {
   if (audio.isRunning())
   {
+    if (asyncStop) {
+    asyncStop = false;
+    stop();
+    }
     deactivateRFID();
     activateSD();
     audio.loop();
     deactivateSD();
     activateRFID();
+  } else if (asyncStart) {
+    asyncStart = false;
+    start();
   }
 
   rfid_loop--;
+  
   if (rfid_loop == 0)
   {
     rfid_loop = RFID_LOOP_INTERVAL;
@@ -332,25 +376,25 @@ void loop()
       readRFID();
     }
   }
-
-  if (buttonPressed(BTN_START_STOP))
-  {
-    if (audio.isRunning())
-    {
-      stop();
-    }
-    else
-    {
-      start();
-    }
-  }
-  delay(5);
 }
 
 void loop2(void *parameter)
 {
   for (;;)
   {
+    if (buttonPressed(BTN_START_STOP))
+    {
+      if (audio.isRunning())
+      {
+        asyncStop = true;
+        asyncStart = false;
+      }
+      else
+      {
+        asyncStart = true;
+        asyncStop = false;
+      }
+    }
   }
 }