2 files changed, 90 insertions, 0 deletions
diff --git a/internal/bible/bible.go b/internal/bible/bible.go
new file mode 100644
index 0000000..0254ceb
--- /dev/null
+++ b/internal/bible/bible.go
@@ -0,0 +1,60 @@
+package bible
+
+import (
+	"embed"
+	"strconv"
+	"strings"
+	"sync"
+)
+
+//go:embed corpora/wuj.tsv corpora/vul.tsv corpora/grb.tsv corpora/drb.tsv
+var corporaFS embed.FS
+
+// Verse is a single verse.
+type Verse struct {
+	Chapter, Verse int
+	Text           string
+}
+
+type corpus struct {
+	books map[string]map[int][]Verse // book -> chapter -> verses (verse-ordered)
+}
+
+var (
+	corpora   = map[string]*corpus{}
+	corporaMu sync.Mutex
+)
+
+func load(version string) *corpus {
+	corporaMu.Lock()
+	defer corporaMu.Unlock()
+	if c, ok := corpora[version]; ok {
+		return c
+	}
+	data, err := corporaFS.ReadFile("corpora/" + version + ".tsv")
+	if err != nil {
+		corpora[version] = &corpus{books: map[string]map[int][]Verse{}}
+		return corpora[version]
+	}
+	c := &corpus{books: map[string]map[int][]Verse{}}
+	for _, line := range strings.Split(string(data), "\n") {
+		f := strings.Split(line, "\t")
+		if len(f) != 6 {
+			continue
+		}
+		chap, _ := strconv.Atoi(f[3])
+		vn, _ := strconv.Atoi(f[4])
+		book := f[0]
+		if c.books[book] == nil {
+			c.books[book] = map[int][]Verse{}
+		}
+		c.books[book][chap] = append(c.books[book][chap], Verse{chap, vn, f[5]})
+	}
+	corpora[version] = c
+	return c
+}
+
+// Verses returns all verses of one chapter of a book in a version (may be empty).
+func Verses(version, book string, chap int) []Verse {
+	return load(version).books[book][chap]
+}
diff --git a/internal/bible/bible_test.go b/internal/bible/bible_test.go
new file mode 100644
index 0000000..efd22d6
--- /dev/null
+++ b/internal/bible/bible_test.go
@@ -0,0 +1,30 @@
+package bible
+
+import "testing"
+
+func TestVerses(t *testing.T) {
+	cases := []struct {
+		version, book string
+		chap, verse   int
+		wantPrefix    string
+	}{
+		{"wuj", "Genesis", 1, 1, "Na początku stworzył Bóg"},
+		{"vul", "Genesis", 1, 1, "In principio creavit Deus"},
+		{"drb", "John", 20, 1, "AND on the first day of the week"},
+		{"wuj", "Wisdom", 3, 1, "A dusze sprawiedliwych"}, // deuterocanonical
+	}
+	for _, c := range cases {
+		vs := Verses(c.version, c.book, c.chap)
+		var got string
+		for _, v := range vs {
+			if v.Verse == c.verse {
+				got = v.Text
+			}
+		}
+		if !hasPrefix(got, c.wantPrefix) {
+			t.Errorf("%s %s %d:%d = %q want prefix %q", c.version, c.book, c.chap, c.verse, got, c.wantPrefix)
+		}
+	}
+}
+
+func hasPrefix(s, p string) bool { return len(s) >= len(p) && s[:len(p)] == p }