1 files changed, 110 insertions, 0 deletions
diff --git a/internal/bible/registry.go b/internal/bible/registry.go
new file mode 100644
index 0000000..2ab721b
--- /dev/null
+++ b/internal/bible/registry.go
@@ -0,0 +1,110 @@
+package bible
+
+import (
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+	"sync"
+)
+
+var (
+	regMu      sync.Mutex
+	userDir    string
+	regBuilt   bool
+	regMeta    map[string]CorpusMeta // code -> meta (user overrides embed)
+	regUserTSV map[string]string     // code -> user .tsv path (override source)
+)
+
+// SetUserCorporaDir sets the drop-in dir and invalidates the registry cache.
+// Empty string disables user corpora (used by tests).
+func SetUserCorporaDir(dir string) {
+	regMu.Lock()
+	userDir = dir
+	regBuilt = false
+	regMu.Unlock()
+
+	corporaMu.Lock()
+	corpora = map[string]*corpus{} // drop cached loads so overrides take effect
+	corporaMu.Unlock()
+}
+
+func buildRegistry() {
+	if regBuilt {
+		return
+	}
+	regMeta = map[string]CorpusMeta{}
+	regUserTSV = map[string]string{}
+	// embedded first
+	ents, _ := corporaFS.ReadDir("corpora")
+	for _, e := range ents {
+		if code, ok := strings.CutSuffix(e.Name(), ".ini"); ok {
+			if m, ok := embeddedCorpusMeta(code); ok {
+				regMeta[code] = m
+			}
+		}
+	}
+	// user dir overrides
+	if userDir != "" {
+		ents, _ := os.ReadDir(userDir)
+		for _, e := range ents {
+			name := e.Name()
+			if code, ok := strings.CutSuffix(name, ".tsv"); ok {
+				regUserTSV[code] = filepath.Join(userDir, name)
+				if _, have := regMeta[code]; !have {
+					regMeta[code] = CorpusMeta{Code: code, PsalmSystem: "vulgate"}
+				}
+			}
+		}
+		for _, e := range ents {
+			if code, ok := strings.CutSuffix(e.Name(), ".ini"); ok {
+				data, err := os.ReadFile(filepath.Join(userDir, e.Name()))
+				if err == nil {
+					regMeta[code] = parseCorpusMeta(code, data)
+				}
+			}
+		}
+	}
+	regBuilt = true
+}
+
+// Corpora returns all known corpora, sorted by code.
+func Corpora() []CorpusMeta {
+	regMu.Lock()
+	defer regMu.Unlock()
+	buildRegistry()
+	out := make([]CorpusMeta, 0, len(regMeta))
+	for _, m := range regMeta {
+		out = append(out, m)
+	}
+	sort.Slice(out, func(i, j int) bool { return out[i].Code < out[j].Code })
+	return out
+}
+
+// Meta returns a corpus's metadata.
+func Meta(code string) (CorpusMeta, bool) {
+	regMu.Lock()
+	defer regMu.Unlock()
+	buildRegistry()
+	m, ok := regMeta[code]
+	return m, ok
+}
+
+// CorporaForLang returns corpora whose lang == lang, sorted by code.
+func CorporaForLang(lang string) []CorpusMeta {
+	var out []CorpusMeta
+	for _, m := range Corpora() {
+		if m.Lang == lang {
+			out = append(out, m)
+		}
+	}
+	return out
+}
+
+// userTSVPath returns the override .tsv path for code, or "".
+func userTSVPath(code string) string {
+	regMu.Lock()
+	defer regMu.Unlock()
+	buildRegistry()
+	return regUserTSV[code]
+}