From 00d22febd2c73f5ccb058ca2211294b1a1d99e9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Wed, 27 Apr 2022 16:06:42 +0200
Subject: Press left/right to select next/previous unwatched episode.

---
 pl/track_episodes.pl | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'pl')

diff --git a/pl/track_episodes.pl b/pl/track_episodes.pl
index f18e85c..1973a75 100644
--- a/pl/track_episodes.pl
+++ b/pl/track_episodes.pl
@@ -2,7 +2,9 @@
 			   toggle_episode/1,
 			   forget_episode/1,
 			   most_recently_watched/1,
-			   watched/1]).
+			   watched/1,
+			   next_unwatched/2,
+			   previous_unwatched/2]).
 
 :- use_module(library(dcg/basics)).
 :- use_module(library(registry)).
@@ -94,3 +96,17 @@ most_recently_watched(Ep) :-
 
 watched(Ep) :-
 	episode_watched(Ep, true).
+
+next_unwatched(Ep0, Ep) :-
+	Ep1 is Ep0 + 1,
+	(   \+ watched(Ep1)
+	->  Ep = Ep1
+	;   next_unwatched(Ep1, Ep)
+	).
+
+previous_unwatched(Ep0, Ep) :-
+	Ep1 is Ep0 - 1,
+	(   \+ watched(Ep1)
+	->  Ep = Ep1
+	;   previous_unwatched(Ep1, Ep)
+	).
-- 
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