From b93de95dd24ff2a1d3126e6d7d00cd77530a03bf Mon Sep 17 00:00:00 2001
From: Lukasz Kasprzak <lukas@labunix.xyz>
Date: Fri, 24 Jul 2026 09:15:40 +0200
Subject: tradlit: offline caching + read; update pre-caches traditional;
 --clean prunes it; v0.2.0

---
 internal/cli/cli.go | 51 ++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 48 insertions(+), 3 deletions(-)

(limited to 'internal/cli')

diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index c514607..130683c 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -18,6 +18,7 @@ import (
 	"github.com/lukaszkasprzak/lectio/internal/liturgy"
 	"github.com/lukaszkasprzak/lectio/internal/readings"
 	"github.com/lukaszkasprzak/lectio/internal/render"
+	"github.com/lukaszkasprzak/lectio/internal/tradlit"
 )
 
 const helpText = `lectio — daily Catholic liturgy readings (Polish + 4 versions)
@@ -241,18 +242,62 @@ func normalizeLectionary(lectionary string) (string, error) {
 }
 
 // runHarvest handles -u/--update: harvest sigla maximally (to the
-// unpublished horizon) from date, printing the outcome or -- on a genuine
-// interruption (see liturgy.Harvest) -- the error.
+// unpublished horizon) from date for the modern lectionary, printing the
+// outcome or -- on a genuine interruption (see liturgy.Harvest) -- the
+// error. On a successful harvest it also best-effort pre-caches the
+// traditional lectionary's propers (internal/tradlit) for every date in
+// that same [date, furthest] window, so 'lectio update' prepares both
+// lectionaries for offline use in one run. The 1962 calendar has no
+// "unpublished horizon" (every date has propers), so this is a plain
+// date-range fetch; a per-date failure is not fatal here -- it never
+// prevented the traditional lectionary from working live before, and the
+// modern-harvest outcome is still reported either way.
 func runHarvest(date string, stdout, stderr io.Writer) int {
 	added, furthest, err := liturgy.Harvest(date, 0)
 	if err != nil {
 		fmt.Fprintln(stderr, "lectio:", err)
 		return 1
 	}
-	fmt.Fprintf(stdout, "harvested %d day(s), furthest %s\n", added, furthest)
+
+	lang := config.Default().TraditionalLang
+	cachedTrad := 0
+	if furthest != "" {
+		if cfg, cfgErr := config.Load(); cfgErr == nil {
+			lang = cfg.TraditionalLang
+			cachedTrad = cacheTraditionalRange(date, furthest, lang)
+		}
+	}
+
+	fmt.Fprintf(stdout, "harvested %d day(s), furthest %s; cached traditional propers (%s) for %d day(s)\n",
+		added, furthest, lang, cachedTrad)
 	return 0
 }
 
+// cacheTraditionalRange best-effort pre-caches tradlit's traditional propers
+// for lang for every date in [from, to] inclusive (walking forward a day at
+// a time), returning how many dates succeeded. A per-date failure (e.g. a
+// transient network hiccup) is ignored -- the traditional 1962 calendar has
+// propers for every date, so there is no "unpublished horizon" to stop at
+// the way liturgy.Harvest has for the modern lectionary.
+func cacheTraditionalRange(from, to, lang string) int {
+	start, err := time.Parse("2006-01-02", from)
+	if err != nil {
+		return 0
+	}
+	end, err := time.Parse("2006-01-02", to)
+	if err != nil {
+		return 0
+	}
+
+	cached := 0
+	for d := start; !d.After(end); d = d.AddDate(0, 0, 1) {
+		if _, err := tradlit.Load(d.Format("2006-01-02"), lang, false); err == nil {
+			cached++
+		}
+	}
+	return cached
+}
+
 // runClean handles -C/--clean: prune cached readings older than one year
 // (relative to today()) and print a human-readable summary of what was
 // removed. Like -u/--update, this is a maintenance mode -- it ignores DATE
-- 
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