From c03cd0bd194832cd845461090b26b80ef5fce291 Mon Sep 17 00:00:00 2001
From: Arkadiusz Fal <arek@arekf.net>
Date: Fri, 17 Apr 2026 20:00:38 +0200
Subject: [PATCH] Store higher-quality YouTube thumbnail URLs in recent
 playlists

Rewrites /vi/ID/{default|mq|hq|sd}default.jpg to maxresdefault.jpg when
saving/updating a recent playlist, so the card shows a sharper image
than the low-res search-result thumbnail.
---
 Yattee/Data/DataManager+Recents.swift |  2 +-
 Yattee/Data/RecentPlaylist.swift      | 19 +++++++++++++++++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/Yattee/Data/DataManager+Recents.swift b/Yattee/Data/DataManager+Recents.swift
index 10b49e9a..254c04b4 100644
--- a/Yattee/Data/DataManager+Recents.swift
+++ b/Yattee/Data/DataManager+Recents.swift
@@ -338,7 +338,7 @@ extension DataManager {
             existing.title = playlist.title
             existing.authorName = playlist.authorName
             existing.videoCount = playlist.videoCount
-            existing.thumbnailURLString = playlist.thumbnailURL?.absoluteString
+            existing.thumbnailURLString = RecentPlaylist.upgradedThumbnailURLString(playlist.thumbnailURL)
             savedEntry = existing
         } else {
             // Create new entry
diff --git a/Yattee/Data/RecentPlaylist.swift b/Yattee/Data/RecentPlaylist.swift
index 856ca4aa..5e3635aa 100644
--- a/Yattee/Data/RecentPlaylist.swift
+++ b/Yattee/Data/RecentPlaylist.swift
@@ -57,10 +57,25 @@ final class RecentPlaylist {
             title: playlist.title,
             authorName: playlist.authorName,
             videoCount: playlist.videoCount,
-            thumbnailURLString: playlist.thumbnailURL?.absoluteString
+            thumbnailURLString: upgradedThumbnailURLString(playlist.thumbnailURL)
         )
     }
-    
+
+    /// Rewrites YouTube `/vi/ID/{default|mq|hq|sd}default.jpg` thumbnails to `maxresdefault.jpg`
+    /// so recent playlist cards show a higher-quality image.
+    static func upgradedThumbnailURLString(_ url: URL?) -> String? {
+        guard let url else { return nil }
+        let path = url.path
+        let upgradable = ["default.jpg", "mqdefault.jpg", "hqdefault.jpg", "sddefault.jpg"]
+        guard path.range(of: #"/vi/[^/]+/"#, options: .regularExpression) != nil,
+              let match = upgradable.first(where: { path.hasSuffix($0) }),
+              var components = URLComponents(url: url, resolvingAgainstBaseURL: false) else {
+            return url.absoluteString
+        }
+        components.path = String(path.dropLast(match.count)) + "maxresdefault.jpg"
+        return components.url?.absoluteString ?? url.absoluteString
+    }
+
     private static func extractSourceInfo(from source: ContentSource) -> (String, String?) {
         switch source {
         case .global: