more progress

api.ino

@@ -2,8 +2,10 @@
 #include <FirebaseJson.h>
 
 #define PLAYER_UPDATE_INTERVAL_MS (500)
+#define UI_ENTRIES_TO_LOAD (20)
 
 static unsigned long playerLastUpdateTime = 0;
+static ViewMode lastViewMode = (ViewMode)-1;
 
 String httpURL(String path) {
   return String(OWNTONE_SERVER_ADDRESS) + "/api/" + path;
@@ -35,13 +37,55 @@ void apiLoop(AppState *state) {
     json.setJsonData(playerText);
     FirebaseJsonData result;
     json.get(result, "volume");
-    Serial.println(result.type);
-    Serial.println(result.to<int>());
-
+    
     state->volume = result.to<int>();
 
     playerLastUpdateTime = state->sinceBoot;
   }
+
+  bool viewNeedsUpdate = (state->viewMode != lastViewMode);
+  if (viewNeedsUpdate) {
+    String parameters = "?limit=" + String(UI_ENTRIES_TO_LOAD);
+    lastViewMode = state->viewMode;
+    if (state->viewMode == ViewModeArtists) {
+      String artistsText = httpGET(String("library/artists" + parameters));
+      FirebaseJson json;
+      json.setJsonData(artistsText);
+      FirebaseJsonData result;
+      json.get(result, "items");
+      FirebaseJsonArray arr;
+      result.get<FirebaseJsonArray>(arr);
+      Serial.println(arr.size());
+
+      if(state->uiEntries != NULL) {
+        free(state->uiEntries);
+      }
+      state->uiEntries = (UIEntry *)malloc(UI_ENTRIES_TO_LOAD * sizeof(UIEntry));
+      state->uiEntriesCount = UI_ENTRIES_TO_LOAD;
+
+      FirebaseJsonData arrayIndexResult;
+      for (size_t i = 0; i < arr.size(); i++) {
+        Serial.println("Processing item...");
+        String path = "/[" + String(i) + "]/";
+        String namePath = path + "name";
+        String idPath = path + "id";
+
+        Serial.println("name...");
+        arr.get(arrayIndexResult, namePath);
+        String text = arrayIndexResult.to<String>().c_str();
+
+        Serial.println("id...");
+        arr.get(arrayIndexResult, idPath);
+        int id = arrayIndexResult.to<int>();
+
+        Serial.println("setting...");
+        state->uiEntries[i].text = text;
+        state->uiEntries[i].id = id;
+        
+        Serial.println(text);
+      }
+    }
+  }
 }
 
 void apiSetup(AppState *state) {

ui.ino

@@ -40,6 +40,7 @@ void uiLoop(AppState *state) {
 
 void uiSetup(AppState *state) {
   lcd.init();
+  lcd.setColorDepth(16);
   lcd.fillScreen(0xFF0000);
   lcd.setBrightness(128);
 

wiowntone.ino

@@ -6,12 +6,36 @@ const char *WIFI_SSID = "TortugaNoT";
 const char *WIFI_PASS = "april302021";
 const char *OWNTONE_SERVER_ADDRESS = "http://192.168.1.2:3689";
 
+enum ViewMode {
+  ViewModeArtists = 0,
+  ViewModeAlbums = 1,
+  ViewModeTracks = 2,
+};
+
+typedef struct UIEntry {
+  // OwnTone ID
+  int id;
+
+  // Text (name, title, etc.)
+  String text;
+} UIEntry;
+
 typedef struct AppState {
   unsigned long sinceBoot;
   
   bool  wifiOnline;
   IPAddress wifiIP;
 
+  ViewMode viewMode;
+  
+  size_t uiEntriesCount;
+  int uiEntryIndex;
+  UIEntry *uiEntries;
+
+  int songCount;
+  int artistCount;
+  int albumCount;
+  
   int volume; // out of 100;
 } AppState;
 
@@ -20,6 +44,13 @@ AppState AppStateMake(void) {
   out.sinceBoot = 0;
   out.wifiOnline = false;
   out.wifiIP = IPAddress();
+  out.viewMode = ViewModeArtists;
+  out.uiEntriesCount = 0;
+  out.uiEntryIndex = 0;
+  out.uiEntries = NULL;
+  out.songCount = 0;
+  out.artistCount = 0;
+  out.albumCount = 0;
   out.volume = 0;
   return out;
 }