export: month calendar PDF (A4 landscape, Monday-first grid, feast name + gospel ref + liturgical colour per day); cli --calendar YYYY-MM; web /calendar + link; readings.GospelCitation; v0.23.0

1 files changed, 36 insertions, 0 deletions

diff --git a/internal/web/server.go b/internal/web/server.go
index 45ab06f..5ebed38 100644
--- a/internal/web/server.go
+++ b/internal/web/server.go
@@ -69,6 +69,7 @@ func NewServer(cfg config.Config) http.Handler {
 	mux.HandleFunc("GET /{$}", func(w http.ResponseWriter, r *http.Request) { indexHandler(s.get())(w, r) })
 	mux.HandleFunc("GET /readings", func(w http.ResponseWriter, r *http.Request) { readingsHandler(s.get())(w, r) })
 	mux.HandleFunc("GET /export", func(w http.ResponseWriter, r *http.Request) { exportHandler(s.get())(w, r) })
+	mux.HandleFunc("GET /calendar", func(w http.ResponseWriter, r *http.Request) { calendarHandler(s.get())(w, r) })
 	mux.HandleFunc("GET /reader", func(w http.ResponseWriter, r *http.Request) { readerHandler(s.get(), s.table())(w, r) })
 	mux.HandleFunc("GET /theme.css", func(w http.ResponseWriter, r *http.Request) { themeCSSHandler(s.get())(w, r) })
 	mux.HandleFunc("GET /settings", settingsGet(s))
@@ -381,6 +382,41 @@ func exportHandler(cfg config.Config) http.HandlerFunc {
 	}
 }
 
+// calendarHandler serves GET /calendar?month=YYYY-MM&lectionary=: a printable
+// A4 PDF month calendar of the celebration names + gospel references. Missing/
+// bad month defaults to the current month.
+func calendarHandler(cfg config.Config) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		t, err := time.Parse("2006-01", r.URL.Query().Get("month"))
+		if err != nil {
+			t = time.Now()
+		}
+		year, month := t.Year(), int(t.Month())
+		cfg.Lectionary = requestLectionary(cfg, r)
+		first := time.Date(year, time.Month(month), 1, 0, 0, 0, 0, time.UTC)
+
+		var days []export.CalendarDay
+		for d := first; int(d.Month()) == month; d = d.AddDate(0, 0, 1) {
+			cd := export.CalendarDay{Day: d.Day()}
+			if secs, info, lerr := readings.Load(cfg, readings.Options{Date: d.Format("2006-01-02"), Offline: cfg.Offline, All: false}); lerr == nil {
+				cd.Name = info.Name
+				cd.Colour = info.Colour
+				cd.Citation = readings.GospelCitation(secs)
+			}
+			days = append(days, cd)
+		}
+
+		data, perr := export.CalendarPDF(year, month, days, cfg.Lectionary, cfg.UILanguage)
+		if perr != nil {
+			http.Error(w, perr.Error(), http.StatusInternalServerError)
+			return
+		}
+		w.Header().Set("Content-Type", "application/pdf")
+		w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="lectio-%04d-%02d-calendar.pdf"`, year, month))
+		w.Write(data)
+	}
+}
+
 // renderOrError returns RenderReadings' fragment, or (on a readings.Load
 // error, or no sections at all for the date) a small escaped error
 // paragraph, localised via lang -- readings.Load errors are expected in