From 300409da061273e84e60f6e33bdcf8d351c8d338 Mon Sep 17 00:00:00 2001
From: Jos Vooges | STH <jos@sthbv.nl>
Date: Tue, 8 Sep 2026 04:10:37 +0200
Subject: [PATCH] Auto-apply local sidecar subtitles on iOS playback start.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 apps/ios/VMC/Data/Models.swift           | 11 +++++++++
 apps/ios/VMC/Playback/PlayerScreen.swift | 29 ++++++++++++++++++++----
 2 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/apps/ios/VMC/Data/Models.swift b/apps/ios/VMC/Data/Models.swift
index bebb677..0d7eecf 100644
--- a/apps/ios/VMC/Data/Models.swift
+++ b/apps/ios/VMC/Data/Models.swift
@@ -52,6 +52,17 @@ struct PlayResult: Decodable {
     let streamUrl: String
     let sessionId: String?
     let mediaFileId: String?
+    let defaultSubtitle: DefaultSubtitle?
+}
+
+struct DefaultSubtitle: Decodable {
+    let fileId: Int?
+    let source: String?
+    let language: String?
+    let fileName: String?
+    let format: String?
+    let contentBase64: String
+    let label: String?
 }
 
 struct ViewerProfile: Decodable, Identifiable, Hashable {
diff --git a/apps/ios/VMC/Playback/PlayerScreen.swift b/apps/ios/VMC/Playback/PlayerScreen.swift
index 2025341..f98c815 100644
--- a/apps/ios/VMC/Playback/PlayerScreen.swift
+++ b/apps/ios/VMC/Playback/PlayerScreen.swift
@@ -12,6 +12,7 @@ struct PlayRequest: Identifiable {
     let startMs: Int64
     let isLive: Bool
     let fallbackUrl: URL?
+    let subtitleFileURL: URL?
 
     static func vod(
         url: URL,
@@ -21,12 +22,13 @@ struct PlayRequest: Identifiable {
         movieId: String?,
         episodeId: String?,
         seriesId: String?,
-        startMs: Int64
+        startMs: Int64,
+        subtitleFileURL: URL? = nil
     ) -> PlayRequest {
         PlayRequest(
             url: url, title: title, mediaType: mediaType, mediaFileId: mediaFileId,
             movieId: movieId, episodeId: episodeId, seriesId: seriesId,
-            startMs: startMs, isLive: false, fallbackUrl: nil
+            startMs: startMs, isLive: false, fallbackUrl: nil, subtitleFileURL: subtitleFileURL
         )
     }
 
@@ -34,7 +36,7 @@ struct PlayRequest: Identifiable {
         PlayRequest(
             url: url, title: title, mediaType: "live", mediaFileId: nil,
             movieId: nil, episodeId: nil, seriesId: nil,
-            startMs: 0, isLive: true, fallbackUrl: fallback
+            startMs: 0, isLive: true, fallbackUrl: fallback, subtitleFileURL: nil
         )
     }
 }
@@ -361,7 +363,7 @@ struct PlayerScreen: View {
         if request.isLive {
             player.playLive(url: request.url, fallback: request.fallbackUrl)
         } else {
-            player.play(url: request.url, startMs: request.startMs)
+            player.play(url: request.url, startMs: request.startMs, subtitleFileURL: request.subtitleFileURL)
             progressTask = Task { await progressLoop() }
         }
         try? await Task.sleep(nanoseconds: 900_000_000)
@@ -468,9 +470,26 @@ struct PlayLauncher: View {
             guard let url = URL(string: play.streamUrl) else {
                 throw ApiError.message("Ongeldige stream-URL")
             }
+            var subtitleURL: URL?
+            if let sub = play.defaultSubtitle,
+               let data = Data(base64Encoded: sub.contentBase64),
+               !data.isEmpty {
+                let ext: String = {
+                    let f = (sub.format ?? "").lowercased()
+                    if f == "vtt" { return "vtt" }
+                    if f == "ass" || f == "ssa" { return "ass" }
+                    return "srt"
+                }()
+                let fileId = sub.fileId ?? 0
+                let path = FileManager.default.temporaryDirectory
+                    .appendingPathComponent("vmc-auto-sub-\(fileId).\(ext)")
+                try data.write(to: path, options: .atomic)
+                subtitleURL = path
+            }
             request = .vod(
                 url: url, title: title, mediaType: mediaType, mediaFileId: mediaFileId,
-                movieId: movieId, episodeId: episodeId, seriesId: seriesId, startMs: startMs
+                movieId: movieId, episodeId: episodeId, seriesId: seriesId, startMs: startMs,
+                subtitleFileURL: subtitleURL
             )
             loading = false
         } catch {