sticker/Database: add method Reopen()

src/sticker/Database.cxx

@@ -67,11 +67,10 @@ static constexpr const char sticker_sql_create[] =
 	" sticker_value ON sticker(type, uri, name);"
 	"";
 
-StickerDatabase::StickerDatabase(Path path)
-	:db(NarrowPath(path))
+StickerDatabase::StickerDatabase(const char *_path)
+	:path(_path),
+	 db(path.c_str())
 {
-	assert(!path.IsNull());
-
 	int ret;
 
 	/* create the table and index */
@@ -91,6 +90,9 @@ StickerDatabase::StickerDatabase(Path path)
 	}
 }
 
+StickerDatabase::StickerDatabase(Path _path)
+	:StickerDatabase(NarrowPath{_path}) {}
+
 StickerDatabase::~StickerDatabase() noexcept
 {
 	if (db == nullptr)

src/sticker/Database.hxx

@@ -53,9 +53,13 @@ class StickerDatabase {
 		  SQL_COUNT
 	};
 
+	std::string path;
+
 	Sqlite::Database db;
 	sqlite3_stmt *stmt[SQL_COUNT];
 
+	explicit StickerDatabase(const char *_path);
+
 public:
 	/**
 	 * Opens the sticker database.
@@ -68,6 +72,14 @@ public:
 	StickerDatabase(StickerDatabase &&) noexcept = default;
 	StickerDatabase &operator=(StickerDatabase &&) noexcept = default;
 
+	/**
+	 * Open another connection to the same database file.
+	 */
+	[[nodiscard]]
+	StickerDatabase Reopen() const {
+		return StickerDatabase{path.c_str()};
+	}
+
 	/**
 	 * Returns one value from an object's sticker record.  Returns an
 	 * empty string if the value doesn't exist.