readings: lectionary router + part filtering

1 files changed, 75 insertions, 0 deletions

diff --git a/internal/readings/readings.go b/internal/readings/readings.go
new file mode 100644
index 0000000..886c1eb
--- /dev/null
+++ b/internal/readings/readings.go
@@ -0,0 +1,75 @@
+// Package readings is the single entry point the CLI and TUI use to fetch
+// a day's readings. It routes between the modern (liturgy) and traditional
+// (tradlit) lectionaries by config, then applies part filtering, returning
+// source-agnostic liturgy.Section values either way.
+package readings
+
+import (
+	"fmt"
+
+	"github.com/lukaszkasprzak/lectio/internal/config"
+	"github.com/lukaszkasprzak/lectio/internal/liturgy"
+	"github.com/lukaszkasprzak/lectio/internal/tradlit"
+)
+
+// Options controls how Load resolves a day's readings.
+type Options struct {
+	// Date is the day to load, formatted YYYY-MM-DD.
+	Date string
+	// Refresh bypasses cache layers and re-fetches from the network
+	// (modern lectionary only; see liturgy.Options.Refresh).
+	Refresh bool
+	// Offline restricts Load to previously cached/harvested data, never
+	// hitting the network. Traditional+Offline is not yet supported.
+	Offline bool
+	// All, when true, keeps every part the config doesn't explicitly hide;
+	// when false, only the gospel is kept.
+	All bool
+}
+
+// Load fetches the day's sections for the configured lectionary
+// (cfg.Lectionary: "traditional" or "new") and applies part filtering.
+// Returns liturgy.Section values regardless of source.
+func Load(cfg config.Config, opts Options) ([]liturgy.Section, error) {
+	offline := opts.Offline || cfg.Offline
+
+	var secs []liturgy.Section
+	var err error
+
+	if cfg.Lectionary == "traditional" {
+		if offline {
+			return nil, fmt.Errorf("readings: offline traditional not yet supported; use lectionary=new offline")
+		}
+		secs, err = tradlit.Load(opts.Date, cfg.TraditionalLang)
+	} else {
+		secs, err = liturgy.Load(liturgy.Options{
+			Date:    opts.Date,
+			Refresh: opts.Refresh,
+			Offline: offline,
+		})
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	return filterParts(secs, cfg, opts.All), nil
+}
+
+// filterParts keeps only the gospel when !all (PartID "ewangelia" modern or
+// "evangelium" traditional), otherwise keeps sections cfg.PartShown allows
+// (a section with an empty PartID is always kept). Pure and network-free.
+func filterParts(secs []liturgy.Section, cfg config.Config, all bool) []liturgy.Section {
+	var out []liturgy.Section
+	for _, s := range secs {
+		if !all {
+			if s.PartID == "ewangelia" || s.PartID == "evangelium" {
+				out = append(out, s)
+			}
+			continue
+		}
+		if s.PartID == "" || cfg.PartShown(cfg.Lectionary, s.PartID) {
+			out = append(out, s)
+		}
+	}
+	return out
+}