From 789bc20106af2716dd72ef3a45fba99bd8231123 Mon Sep 17 00:00:00 2001
From: eric <3024947@stud.hs-mannheim.de>
Date: Fri, 8 Aug 2025 01:58:49 +0200
Subject: [PATCH] =?UTF-8?q?playback=20f=C3=A4ngt=20in=20der=20mitte=20an?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 .../Roullette/controller/GameController.java  | 43 +++++++++++++------
 1 file changed, 31 insertions(+), 12 deletions(-)

diff --git a/src/main/java/eric/Roullette/controller/GameController.java b/src/main/java/eric/Roullette/controller/GameController.java
index 5347025..6a0eafe 100644
--- a/src/main/java/eric/Roullette/controller/GameController.java
+++ b/src/main/java/eric/Roullette/controller/GameController.java
@@ -129,23 +129,42 @@ public class GameController {
         }
 
         try {
-            String accessToken = authService.getAccessTokenForUser(username); // Token vom SpotifyAuthService holen
+            String accessToken = authService.getAccessTokenForUser(username);
             OkHttpClient client = new OkHttpClient();
-            ObjectNode jsonNode = JsonNodeFactory.instance.objectNode();
-            jsonNode.putArray("uris").add(trackUri);
-            String jsonBody = jsonNode.toString();
 
-            Request request = new Request.Builder()
-                    .url("https://api.spotify.com/v1/me/player/play?device_id=" + deviceId)
+            // 1. Track-Details holen
+            String trackId = trackUri.split(":")[2];
+            Request getTrack = new Request.Builder()
+                    .url("https://api.spotify.com/v1/tracks/" + trackId)
                     .addHeader("Authorization", "Bearer " + accessToken)
-                    .put(RequestBody.create(jsonBody, MediaType.parse("application/json")))
                     .build();
+            try (Response trackResp = client.newCall(getTrack).execute()) {
+                if (!trackResp.isSuccessful()) {
+                    ctx.status(500).result("Fehler beim Laden der Track-Details");
+                    return;
+                }
+                var node = new com.fasterxml.jackson.databind.ObjectMapper().readTree(trackResp.body().string());
+                long durationMs = node.get("duration_ms").asLong();
+                long startOffset = durationMs / 2;
 
-            try (Response response = client.newCall(request).execute()) {
-                if (response.isSuccessful()) {
-                    ctx.status(204).result("Track erfolgreich abgespielt");
-                } else {
-                    ctx.status(response.code()).result("Fehler: " + response.body().string());
+                // 2. Play-Request mit position_ms
+                ObjectNode jsonNode = JsonNodeFactory.instance.objectNode();
+                jsonNode.putArray("uris").add(trackUri);
+                jsonNode.put("position_ms", startOffset);
+                String jsonBody = jsonNode.toString();
+
+                Request playReq = new Request.Builder()
+                        .url("https://api.spotify.com/v1/me/player/play?device_id=" + deviceId)
+                        .addHeader("Authorization", "Bearer " + accessToken)
+                        .put(RequestBody.create(jsonBody, MediaType.parse("application/json")))
+                        .build();
+
+                try (Response playResp = client.newCall(playReq).execute()) {
+                    if (playResp.isSuccessful()) {
+                        ctx.status(204).result("Track erfolgreich abgespielt");
+                    } else {
+                        ctx.status(playResp.code()).result("Fehler: " + playResp.body().string());
+                    }
                 }
             }
         } catch (Exception e) {