Add GetPkg endpoint to API

internal/db/db.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"github.com/genjidb/genji"
+	"github.com/genjidb/genji/document"
 	"github.com/genjidb/genji/types"
 )
 
@@ -81,6 +82,18 @@ func GetPkgs(db *genji.DB, where string, args ...any) (*genji.Result, error) {
 	return stream, nil
 }
 
+// GetPkg returns a single package that match the where conditions
+func GetPkg(db *genji.DB, where string, args ...any) (*Package, error) {
+	doc, err := db.QueryDocument("SELECT * FROM pkgs WHERE "+where+"LIMIT 1", args...)
+	if err != nil {
+		return nil, err
+	}
+
+	out := &Package{}
+	err = document.ScanDocument(doc, out)
+	return out, err
+}
+
 // DeletePkgs deletes all packages matching the where conditions
 func DeletePkgs(db *genji.DB, where string, args ...any) error {
 	return db.Exec("DELETE FROM pkgs WHERE "+where, args...)