Resolve saved native channel references after receiver migrations

2026-10-23 18:31:55 +02:00
parent 0ab790d1e4
commit 4ff46f547b
9 changed files with 227 additions and 5 deletions
@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using MediaBrowser.Controller.LiveTv;
+
+namespace Jellyfin.Plugin.Enigma2;
+
+/// <summary>Keep saved native channels playable after a receiver bouquet migration.</summary>
+public static class ChannelReferenceResolver
+{
+    public static string Resolve(string reference, IEnumerable<ChannelInfo> channels, Func<string> previousName)
+    {
+        var current = channels.Where(c => !string.IsNullOrWhiteSpace(c.Id)).ToArray();
+        var exact = current.FirstOrDefault(c => string.Equals(c.Id, reference, StringComparison.OrdinalIgnoreCase));
+        if (exact != null) return exact.Id;
+
+        // A changed Enigma service type does not change the DVB service identity.
+        var identity = Identity(reference);
+        var matches = current.Where(c => identity != null && Identity(c.Id) == identity)
+            .Select(c => c.Id).Distinct(StringComparer.OrdinalIgnoreCase).ToArray();
+        if (matches.Length == 1) return matches[0];
+        if (matches.Length > 1) return reference;
+
+        // A moved service has a new SID/TSID. Use only a unique exact historical
+        // name; never guess between HD/SD, regional or alternative services.
+        var name = previousName()?.Trim();
+        if (string.IsNullOrEmpty(name)) return reference;
+        matches = current.Where(c => string.Equals(c.Name?.Trim(), name, StringComparison.OrdinalIgnoreCase))
+            .Select(c => c.Id).Distinct(StringComparer.OrdinalIgnoreCase).ToArray();
+        return matches.Length == 1 ? matches[0] : reference;
+    }
+
+    private static string Identity(string reference)
+    {
+        var fields = reference?.TrimEnd(':').Split(':');
+        if (fields == null || fields.Length != 10 || fields[0] != "1" || fields[1] != "0") return null;
+        // No URLs, labels or non-DVB references participate in this fallback.
+        if (fields.Any(f => f.Length == 0 || !f.All(Uri.IsHexDigit))) return null;
+        fields[2] = "";
+        return string.Join(':', fields).ToUpperInvariant();
+    }
+}