create api endpoint for playlist

lib/app/app.cpp

@@ -29,6 +29,7 @@ const char *jsonAppVersion = "/dist/version.json";
 AppConfig appConfig;
 
 void setupApiDevice();
+void setupApiPlaylist();
 void setupApiSettings();
 void setupApiWifi();
 void setupApiCache();
@@ -89,6 +90,7 @@ void setupApp()
 	server.serveStatic("/fs/", SPIFFS, "/");
 
 	setupApiDevice();
+	setupApiPlaylist();
 	setupApiSettings();
 	setupApiWifi();
 	setupApiCache();
@@ -130,8 +132,8 @@ void setupApp()
 		doc["device"]["heap"]["total"] = ESP.getHeapSize();
 		doc["device"]["heap"]["free"] = ESP.getFreeHeap();
 
-		doc["playlist"]["current"] = PlaylistGetCurrentFace();
-		doc["playlist"]["remaining"] = (PlaylistGetRemainingTimeMs() / 1000) + 3; // + face rendering time 3s
+		doc["playlist"]["current"] = playlistGetCurrentFace();
+		doc["playlist"]["remaining"] = (playlistGetRemainingTimeMs() / 1000) + 3; // + face rendering time 3s
 
 		doc["firmware"]["created"] = FW_CREATED;
 		doc["firmware"]["rev"] = FW_GIT_REV;
@@ -163,7 +165,7 @@ void loopApp()
 		Serial.println("loop app update display");
 
 		// stop playlist to show the new image
-		PlaylistResetTimer();
+		playlistResetTimer();
 
 		updateDisplayRequired = false;
 		displayFlush();
@@ -294,7 +296,7 @@ void setupApiDevice()
 				bool dither = strcmp(filename.c_str(), "dithering") == 0;
 
 				ImageNew(0, 0, 0, 0, dither);
-				PlaylistResetTimer();
+				playlistResetTimer();
 			}
 
 			ImageWriteBuffer(data, len);
@@ -352,6 +354,21 @@ void setupApiDevice()
 	});
 }
 
+/**
+ * api playlist endpoint
+ */
+void setupApiPlaylist()
+{
+	server.on("/api/playlist/show", HTTP_GET, [](AsyncWebServerRequest *request) {
+
+		if (request->hasParam("face")) {
+			playlistShow(request->getParam("face")->value().c_str());
+		}
+
+		request->send(200, "application/json", "{}");
+	});
+}
+
 /**
  * api wifi endpoint
  */

lib/playlist/playlist.cpp

@@ -61,43 +61,58 @@ void loopPlaylist()
 		faces[i].loop();
 	}
 
-	if (PlaylistGetRemainingTimeMs() <= 0) // && autoplayEnabled
+	if (playlistGetRemainingTimeMs() <= 0) // && autoplayEnabled
 	{
-		PlaylistResetTimer();
-		PlaylistNextFace();
+		playlistResetTimer();
+		playlistNextFace();
 
 		Serial.println("switch face: " + faces[currentFaceIndex].name);
 		faces[currentFaceIndex].show();
 	}
 }
 
-void PlaylistNextFace()
+void playlistNextFace()
 {
 	currentFaceIndex++;
 
-	// wrap around at the ends
 	if (currentFaceIndex < 0)
 	{
-		currentFaceIndex = faceCount - 1;
+		currentFaceIndex = 0;
 	}
 
+	// wrap around at the ends
 	if (currentFaceIndex >= faceCount)
 	{
 		currentFaceIndex = 0;
 	}
 }
 
-String PlaylistGetCurrentFace()
+String playlistGetCurrentFace()
 {
 	return faces[currentFaceIndex].name;
 }
 
-int32_t PlaylistGetRemainingTimeMs()
+int32_t playlistGetRemainingTimeMs()
 {
 	return timer - (millis() - lastSwitch);
 }
 
-void PlaylistResetTimer()
+void playlistResetTimer()
 {
 	lastSwitch = millis();
+}
+
+void playlistShow(const char name[])
+{
+	for (uint8_t i = 0; i < faceCount; i++)
+	{
+		if (faces[i].name.equalsIgnoreCase(name))
+		{
+			Serial.println("switch to face " + faces[i].name);
+
+			currentFaceIndex = i -1;
+			lastSwitch = 0;
+			break;
+		}
+	}
 }

lib/playlist/playlist.h

@@ -6,9 +6,10 @@
 void setupPlaylist();
 void loopPlaylist();
 
-void PlaylistNextFace();
-String PlaylistGetCurrentFace();
-int32_t PlaylistGetRemainingTimeMs();
-void PlaylistResetTimer();
+void playlistNextFace();
+String playlistGetCurrentFace();
+int32_t playlistGetRemainingTimeMs();
+void playlistResetTimer();
+void playlistShow(const char name[]);
 
 #endif